Improvements in Tympan-shifting Mechanism for Printing": Machines.
Year: 1899

page_text: Date of Application, 24th Jan., 1899-Accepted, 25th Mar., 1899
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1 COMPLETE SPECIFICATION.
'
[Communicated from abroad by ROBERT HOE, Printing Press Manufacturer, of 504,
Grand Street, in the City of New York, State of New York, United States of
America.]
Improvements in Tympan-shifting Mechanism for Printing":
Machines.
I, HENRY EDWARD NEWTON, of the Office for Patents, 6, Breams Buildings, Chancery
Lane, in the County of London, Patent Agent, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
The object of, this invention is to provide the second impression surface of a
perfecting printing machine, such as a two-revolution flat-bed printing machine,
with a tympan or offset covering, in the form of a long sheet or web (hereinafter
called the tympan), and with a tympan-shifting mechanism, whereby a clean
portion of said tympan, equal at least to the extent of the impression surface of
the cylinder used in the printing operation, and which may be called the printing
surface, may be presented for each sheet printed, which, in the example referred:
to, will be at every second revolution of the impression cylinders, whereby the
offset from the freshly printed sheet is taken up, and each sheet printed upon is:
protected from being soiled.
The invention consists in the structure and combination of mechanisms whereby
the aforesaid object is carried out or practically embodied, all of which is so
specifically hereinafter explained and claimed, as to need no further preliminary
description.
One practical embodiment of the invention is illustrated in the accompanying
drawings, wherein :-,
Figure represents an elevation of one end of the second impression cylinder of
a perfecting printing machine, and particularly that of a double-cylinder flat-bed
perfecting printing machine provided with these improved tympan appliances or
mechanisms, the view being taken from the gear side of the machine, and just
within the side frame, as is indicated by the section line 1 in Figure 5, the direction
in which the view is seen being indicated by the arrow 1 in Figure 5.
* Figure 2 is an elevation of the opposite end of said impression cylinder, or as the
same is seen from the non-gear or feeding side of the machine, looking in the
direction of the arrow 2 in Figure 5.
Figure 3 is a transverse sectional elevation of said impression cylinder and its
tympan appliances, the view being taken on the section line 3 of Figure 5, and as
seen from the gear side of the machine, or when looking in the direction in which
the arrows attached to the section line 3 point.
Figure 4 is a view similar to Figure 1, but with parts broken away, and with the
shifting mechanism adjusted so as to move the tympan in a direction contrary to that
in which it is illustrated as moving in the other figures.
Figure 5 is a broken side elevation of said cylinder and its mechanisins, the view
being taken on section line 4 of Figures 1 and 2, and illustrating the mechanisms

page_text: as seen looking in the direction of the arrows 4 associated with said Figures 1
and 2.
Figure 6 is an elevation of part of the end of the impression cylinder at the gear
side of the machine, the view being as seen looking in the direction in which the
arrow points in Figure 5.
Figures 7, 8, and 9, illustrate the clutches for the tympan rollers, which clutches
are alike, except that one is right-handed and the other left-handed;-Figures 7
and 8 being sectional views on the line 7 of Figure 9, and showing the parts in two
different positions; while
Figure 9 is a sectional elevation of one end of the tympan shaft taken on the
section line 9 of Figure 7, and showing the clutch mechanism.
Figure 10 is an elevation, partly in section, on the section line 10 of Figure 11 of
the clutch operating the measuring rollers, as seen from the gear side of the
machine.
Figure 11 is a plan view of the same, as seen on the section line 11 of Figure 10.
Figure 12 is an end elevation of the same, as seen looking in the direction of the
arrow 12 in Figure 10.
Figure 13 is a plan view of a portion of the bearer 82 and its accessories.
Figures 14, 15, 16, and 17, are diagrams showing the method of changing the
direction of the travel of the tympan web at the end of its run in one direction, the
views being taken from the feeding side of the machine.
Figure 18 is an inside facial view of the wheel 62, illustrating more particularly a
means for adjusting the cam 52.
Figure 19 is a sectional view thereof, taken on the section line 19, as seen in the
direction indicated by the pointer attached to said section line; and
.
Figure 20 is a bottom plan view, as indicated by the arrow 20 associated with
Figure 18, showing more particularly the structure of the adjustable governing guard
or cam guide 52.
Figures 21 and 22 represent a counting device for automatically operating the
reversing mechanism.
In order that a general understanding of the invention may be had, preliminary to
a detailed description of the mechanisms embodying it, it should be stated that the
impression cylinder I may be provided with grippers 88, as is usual, whereby sheets
are successively clamped to the cylinder, laid onto that portion of it which is the
impression surface, and carried around upon it into contact with the printing form, a
tympan covering said impression surface so as to take up whatever ink offsets from
the first printed side of said sheets. Before a repeated impression is made upon this
tympan-protected impression surface, the mechanisms operate so as to cause an extent
of tympan equal at least to a sheet's length to be shifted circumferentially over the
impression surface of the cylinder. This shifting of the tympan occurs at each second
revolution of the cylinder, such a shifting of the tympan, after each printing
impression, being repeated in one direction until a long tympan, say, one equal to the
length of two hundred sheets, has been progressively so shifted, whereupon the
shifting mechanism is automatically reversed, so that it causes the tympan to be
unwound, and shifted in the contrary direction an equal number of times, and
so on.
This tympan-shifting mechanism embodies the following principal parts: A long
web W of tympan, whose opposite ends are respectively secured to tympan rollers T, R,
and adapted to be unwound from one tympan roller (as R) and wound up upon the
other tympan roller (as T), or vice versa, which tympan rollers are located within
the casing of the cylinder I, and the tympan W in passing from one tympan roller
(as R) to the other (as T) is led over a guiding roller 50 within the cylinder, thence
outside of the cylinder and over its impression surface, thence into the cylinder and
over a guiding roller, 51, to the surface of the other tympan roller (as T), and vice
versa, according to the direction in which the tympan may be moving.
The winding-up movements of this tympan are effected by means of clutch
mechanisms attached respectively to the shafts of the tympan rollers T, R, said

page_text: clutch mechanisms being outside the head of the cylinder at the gear side of the
machine. The loose member of each of these clutch mechanisms is, of course, at
times locked fast to the tympan roller shaft, to drive the same, and at other times
runs freely thereon, and the loose member of the clutch mechanism belonging to
the shaft of the tympan roller T is constantly rotated by means of a pinion 60, and the
corresponding loose member of the clutch nechanisın belonging to the shaft of the
tympan roller R is constantly driven by a pinion 61 attached thereto, which
pinion 60, 61, mesh with a stationary wheel 62 that is fixed to the cylinder shaft
journal-box 63.
It will have been understood that the winding-up action of these tympan rollers T, R,
is alternative, that is to say, the tympan is wound up in one direction on the roller T,
and simultaneously unwound from the roller R, and when a complete unwinding of
the same from the roller R has been effected, a reverse operation causes this roller R
to become a receiving or winding up roller for the tympan from the delivering or un-
winding roller T.
In order to a clear understanding of this operation, we will consider the winding-up
operation in one direction only, having reference to Figure 3, as showing the initial
position of the web of tympan. A description of how the web is unwound from the
delivering roller R, and wound up upon the receiving roller T, in, say, two hundred,
or, as shown herein, about two hundred and eighty, successive step-like shifting
movements, before the reversal takes place, will first be described.
To admit of this operation, the driving action of the pinion 61, through the clutch
connected with the shaft of the tympan delivering roller R, must first be suspended
by unclutching said pinion from the shaft of the roller R, and the clutch mechanism
connected with the tympan receiving roller T must be put into clutching action, in
order that the pinion 60 may drive that roller, to cause the winding-up operation.
These novel clutches, as herein shown, will be described, although other clutch
mechanisms may be substituted therefor, without departing from the invention.
One of these clutches, that associated with the tympan roller T, will now be described
with special reference to Figures 7, 8, and 9, which show the clutches connected with
the shaft of the roller T, but as the parts corresponding therewith on the shaft of the
tympan roller R are the same in structure, they are marked with like letters of
reference, in order that this description may apply thereto, wherever that mechanism
is shown herein, Figures 7 and 9 showing the clutch in its active position, and
Figure 8 the same in its inactive or unclutched position.
The loose member M of the clutch nechanism has an annular outward projection,
to which is secured the driving pinion 60, and which annular projection and pinion
normally revolve freely upon a hub 64 that is keyed to the shaft 65 of the tympan
roller T. This hub carries radially-disposed tenons 66, in this instance, four, upon
which tenons segmental bearers 67 are so mounted that they may move slightly outward
and inward upon these tenons as guiding bearers. These bearers 67 project laterally
within and circumferentially with respect to the loose member M, and have broad and
roughened surfaces in contact therewith, and they overhang arms 68, that are secured
by pivots 69 to an oscillating ring 70, that moves on a hub 71 between the loose
member M and a plate 72, to which plate 72 said hub 71 is attached, the said plate 72
being fixed to the cylinder head by bolts 73. This fixed hub 71 projects from the
plate 72 within the member M, and extends to the radial tenons of the hub 64, and
it carries at equidistant points around its surface, near its outer end, cam projec-
tions 8, upon which the inner faces of the arms 68 ride. The oscillating ring 70
carrying the overhanging arms 68 is moved so that the cam projections 8 of the hub 71
shall rock the arms or levers 68 when the same are carried over said projections by the
movement of the ring 70, and thus force the segments 67 into frictional contact with
the inner periphery of the loose member M of the clutch, by the action of the spring-
pressed rods 74, which are attached to ears fast upon said ring 70, the contrary move-
ment of these rings 70 being effected by contact with their lugs 75, against which
rocking tappets 76 are pressed at proper times by the cam D, as is shown in connection

page_text: with the lug 75 of the oscillating ring 70 of the clutch mechanism coniected with
the tympan roller R.
Understanding that when the web of tympan is to be unwound from the tympan
roller R, and to be simultaneously wound np upon the tympan roller T, the clutch
mechanism connecting the driving pinion 60 with the shaft of the tympan-receiving
roller T being in active operation as just described, that roller will be rotated to wind
up the tympan web, for the reason that the friction exerted between the roughened
surfaces of the bearers 67 and the part M will be sufficient to so lock the parts
together as to cause them to move in unison while the smoother surfaces of the arms 68
in contact with the bearers 67 exerting less friction, will admit of the bearers 67
riding over them while they continue to maintain the frictional adherence of the
bearers 67 and the member M. This winding-shifting movement of the tympan must
however not only be controlled, but the time when it is to take place must be deter-
mined, and the extent to which it is to be shifted must be governed. These objects
are attained as follows:-Two controlling rollers, K, L, whose surfaces frictionally pay
out, and thus measure the extent of tympan shifted, are mounted in oscillating
frames 0, 0, so that the active controlling roller L, in this present described move-
ment shall be in frictional bearing contact with the periphery of the roll V of tympan
being unwound, and the revolutions of this controlling roller are such as to cause its
periphery to roll in contact with the unwinding tympan web to an extent that is
equal to the length of tympan web it is desired to move after each impression. These
controlling rollers K, L, have their shafts 10, 11, journalled in the oscillating frames
0, 0¹, which latter are hung on the main shaft 150¹, and counterbalanced, as by the
weight bar 59 connecting them.
Whenever these oscillating frames 0, 0¹, are moved to bring the controlling
roller L into contact with the roll V of tympan web then carried by the unwinding
tympan roller R, the controlling roller K is simultaneously moved away from the
tympan receiving roller T, whereupon this controlling roller L will be held in
frictional contact with the periphery of the roll V of tympan web on the tympan-
delivering roller R, by the action of the spring-seated rods 80, 81, which are pivotted
to curved bearers 82, 83, that slide in curved guiding ways attached to the heads of
the cylinder, and press against said oscillating frames:-and the clutch mechanism
connected with the shaft of said delivering roller R will be simultaneously unclutched
therefrom by the action of the cams D, D¹, as follows:-
The action of these cams D, D¹, is as follows:-The cam D cooperates with the
friction rollers 2, 4, and the cam D' cooperates with the rollers 3, 5, while the cam D
also moves the rock arms 12, 13 of a tappet 76 belonging to the clutch mechanisms,
and the movement of these arms is a quarter oscillation and then a long period
of rest. While resting, as in Figure 1, the high parts of these cams D, D¹,
bear against the friction rollers 2, 3, compress the springs on the rods 86, 87,
and hold the spring-pressed bearers 84, 85, out of contact with the oscillating
frames 0, 0¹, and, through the rock arm 12, the cam D releases the clutch
connected with the shaft of the tympan roller R. When these cams D, D¹, move
to carry the mechanisms to, and maintain them in the positions in which they
are in most instances illustrated, their action is to move their high parts away
from the friction rollers 4, 5, and thus release the bearers 82, 83, and permit
them to abut against the oscillating frames 0, 0, and thus press the same in a
direction toward the tympan roller R and away from the roller T.
The cam D also releases the rock arm 13, and the clutch mechanism simultaneously
becomes active with respect to the tympan roller T, through the action of the spring-
pressed rod 74. When the oscillating movement of these cams D, D', in this
direction is complete, they will have reached the positions shown in Figures 1 and 2,
which are views of opposite ends of the cylinder, the cam D having pressed
against and caused the rock arm 12 to rock the ring 70, and thus throw the
clutch mechanism actuated thereby out of action with respect to the tympan
roller R, and at the same time the spring pressed bearers 84, 85 pivotted to the

page_text: spring-seated rods 86, 87 are forced away from, and held out of contact with, said
oscillating frames 0, 0¹, by the cams D D¹.
With the mechanisins in the positions last described, the tympan-shifting
apparatus is in condition to be repeatedly operated to shift the tympan a large
number of times, say, two hundred, or, as shown herein, about two hundred and
eighty, according to the length which the tympan web has, said shifting being
performed, as before stated, at every second revolution of the impression cylinder,
and being made to an extent that is equal to the impression surface of the form with
which said cylinder cooperates.
The shifting movements of this tympan web are controlled by the paying out or
feeding action of the controlling roller L, which is rotated to frictionally drive and
unwind the rolled web V on the tympan-delivering roller R, while the companion
controlling roller K is out of action with respect to the tympan-receiving roller T,
and the latter is rotated by its driving pinion 60 (then frictionally coupled to its
shaft), to wind up the paid-out web, the positive driving action of this pinion 60,
which might otherwise tear the web, being compensated for to the extent that it
shall only roll up the web sufficiently to draw snugly and tightly around the
impression surface of the cylinder, and thus keep it taut, by the slipping action
which takes place in the mechanism frictionally clutching this driving pinion 60)
with the shaft of the tympan carrying roller T.
These controlling rollers K, L, are driven by means of sprocket wheels 30, 31,
carried on their shafts, just inside the cylinder head, with which a sprocket driving
chain 32 co-acts said chain running over a driving sprocket wheel 33, and being
intermediately supported by guide rollers 34, 35. The driving sprocket wheel 33 is
fast on a short shaft 36 that carries a driving pinion 37 running loosely on the outer
end of said shaft, where it meshes with, and is positively driven by, the fixed
wheel 62.
As this driving pinion 37 constantly revolves, and as the controlling roller must
intermittently revolve, said pinion is provided with a clutch whereby it may be
periodically coupled to the shaft 36. The loose member 4 of this clutch is a
hollow rimmed member fast to the hub of the pinion 37, and extends
inwardly, while the fast portion 41 of this clutch is a hollow rimmed member
fast to the hub of the pinion 37, and extends inwardly, while the fast portion
41 of this clutch is a hollow rimmed member) secured by a sleeve to the
shaft 36, and extends toward the loose member 40, the two constituting a hollow
structure for containing the interior spring bearer 29, which is secured to the sleeve
of the fast member 41. They are set apart so as to provide hetween their facing
flanges a space for the interposition of lugs 42 projecting inwardly from the exterior
friction band 39, which friction band 39 embraces this clutch mechanism, and has
one end fast to a poppet head 43 secured to a rock arm 44, that is fast to a rocking
sleeve 9 that vibrates on a pin 45 fast to the cylinder head, while the opposite end of
said friction band 39 is pivotted to a rock arm 46, also extending from said rocking
sleeve 9, which rocking sleeve 9 and connected parts are maintained in one position
by means of the spring-seated rod 47, which, attached to a rock arm 28 extending
from the sleeve 9, constantly presses outwardly, and mormally tightens the friction
band 39.
The spring bearer 29 normally tends to press against the interior surface of the
inwardly-projecting flange of the loose part 40 of the clutch mechanism, to frictionally
couple the two together, as in Figure 10. The friction band 39 is normally main-
tained in its tightened position by means of the spring-seated rod 47, which, holding
the parts in their dotted positions, shown in Figure 10, causes the lugs 42 to press
inwardly against the spring 29, and hold it away from, or out of contact with, the
inner peripheries of said fast and loose parts of the clutch, said band 39 simultaneously
contacting with the exterior surface of the fast part. 41 of the clutch, and acting as
a friction brake, to arrest the rotation of the shaft 36, and suspend any movement of
the controlling roller L. Thus, the driving pinion 37 being normally unclutched

page_text: from the shaft 36, it follows that the tympan controlling rollers K, L, are normally
stationary.
This friction band 39 is periodically loosened and expanded, to permit the
spring 29, through the clutch mechanism, to couple the driving wheel 37 with the
shaft 36 by means of an arm 48 that projects from the rocking sleeve 9, and carries
a friction bowl 49, which normally runs inside of a fixed governing guard or cam
guide 52, which projects froin the inner face of the fixed wheel 62, as appears by the
dotted lines in Figure 10.
So long as the friction bowl travels normally or within the governing guard or
cam guide 52, the tympan-controlling rollers are stationary, and the tympan is not
shifted, but when the bowl 49 is caused to travel on the outer side of the said guard
or guide 52, it will be raised to its full line position shown in Figure 10, thus
expanding the friction band 39, causing the lugs 42 to relieve the spring 29, and the
latter to bear upon the loose part 40 of the clutch mechanism, and couple the
driving pinion 37 to the shaft 36; consequently driving the controlling roller L so
long as the governing guard or cam guide 52 maintains this relation of the parts.
According, therefore, to the length of the said guard or guide 52, will be the
duration of the described coupling action with respect to the circumference of the
cylinder I, and consequently the number of turns of the controlling roller L, and
the resulting surface movement of said roller and the tympan it governs. This
guard or guide, therefore, governs the extent to which the tympan is shifted at each
movement. In order to determine the time when this shifting movement shall take
place, the entrance of the bowl 49 onto the governing guard or cam guide 52 is
accomplished by a switch 53, the time of the action of which is determined by a
cam 58. This switch slides on a pin 54, and is actuated by a guiding pin 55 that
reciprocates in a guiding sleeve 56, said pin 55 having a head 57 from which a toe
projects into the groove of a cam 58, that is fast upon, and revolved by, a wheel 78,
which is driven outside of the framework by a pinion 77 on the shaft 150 of the
impression cylinder.
The pinion 77 being half the size of the wheel 78 it drives, it follows that the
periodical movement of this switch 53 is at every second revolution of the impression
cylinder, whence it results. that the friction roller 49, and hence the arm 48, is main-
tained within the fixed guard or guide 52 by the action of the spring rod 47 during
one revolution of the impression cylinder, as is shown in dotted lines in Figure 10,
and is thus caused to contact with, and ride over, switch 53, and hence onto the
outer periphery of the fixed guard or guide 52, as shewn in full lines in Figure 10,
during each alternate revolution of the impression cylinder.
When the arm 48, and its friction roll 49, travel within the fixed guard or guide 52,
the tympan remains stationary, and this is during the printing revolution of the
impression cylinder I, and when the said friction roller runs on the outer side of the
fixed guard or guide 52, the tympan-shifting mechanism becomes active, and operates
to shift the tympan at a period which is during the second or non-printing revolution
of the impression cylinder.
With the parts thus acting, it is obvious that during each second or non-printing
revolution of the impression cylinder I, the tympan will be shifted a distance equal
to the extent of circumferential travel or peripheral movement of the controlling
roller L, the surface of which bears frictionally, under the pressure of the spring
rods 80 and 81, upon the constantly decreasing periphery of the unwinding roll V of
tympan web carried by the delivering roller R, the extent of which measuring move-
ment or circumferential travel of the periphery of the controlling roller being
determined by the length of the fixed guard or guide 52, which governs the period
of time in which the chain 32 shall drive said roller, and consequently the extent to
which the tympan is moving, or, otherwise stated, the duration of time in which the
clutch mechanism connected with the driving sprocket wheel 33 is in action.
The extent to which the tympan-carrying rollers R, T, will revolve at each shifting
movement of the tympan, will vary of course as the rolled tympan web V carried by
the delivering roller R diminishes in size, and the shifting operations will be repeated

page_text: so long as there is tympan web upon the delivering roller R to be thus shifted, but,
as the quantity that can be carried by one roller is necessarily a limited one, it is
requisite, for a continuous operation, that when the tympan upon the delivering
rolier R is about to become exhausted, by being shifted or transferred to and wound
up upon the tympan-receiving roller T, the mechanisms shall be reversed in their
operation, and said tympan web shall be shifted or fed by the repeated step-like
shifting movements described, in the opposite direction, in which operation the
tympan-carrying roller T becomes the delivering roller, and the roller R becomes the
tympan-receiving roller.
It is found to be practical in the size of the machine illustrated, to provide a
tympan web that may be shifted distances equal to the lengthwise extent of the
impression surface two to three hundred times in one direction before it is
reversed, and shifted two to three hundred times in the opposite direction.
As this tympan-shifting mechanism, as shown herein, is arranged to shift the
tympan two hundred times, and then be reversed, it is apparent, since every other
revolution of the impression cylinder is the printing period, that the reversing of the
tympan-shifting devices must take place after four hundred revolutions of the cylinder
have been made.
.
To accomplish this reversal, in order that the mechanisms shall feed in the opposite
direction from that which has been described, as is illustrated in Figure 4, it is obvious
that the oscillating frames 0, 0¹, must be swung to cause the controlling roller K to
become active by frictionally contacting with the periphery of the rolled tympan
web V then accumulated upon the tyinpan carrying roller T, and also that the friction
clutch connected with the shaft of the tympan roller R shall be released or put out of
action, and that the friction clutch connected with the tympan roller T shall be put
into action.
The means accomplishing this is a tripping bolt A, that is arranged to reciprocate
in one of the side frames 100 on the feeding side of the machine, its movement being
effected by any common means for producing reciprocation, after any predetermined
number of revolutions of the moving instrumentalities in the machine.
The object of this tripping bolt is (after each two-hundredth impression or other
predetermined number, according to the length of tympan that may be carried upon
its tympan rollers) to trip the operating mechanisms of said tympan rollers, so that
the tympan may be caused to travel in a contrary direction to that in which it is
running at the time of the tripping operation.
This tripping bolt A is arranged to slide in the side frame at the feeding side of
the machine, and it is provided with means for causing it to be reciprocated, and
thus protruded inward for action upon the mechanisms at an appropriate revolution
of the impression cylinder, as, say, the four-hundredth, or, as shewn herein, the five
hundred and sixty-second. Said means may be automatic, if desired, and actuated
by suitable connections from a moving part of the machine, or be operated by hand
by the attendant, a suitable index showing the approach of the four-hundredth revo-
lution being provided, if desired.
A mechanism by which the proper movement of the bolt A may be effected is
illustrated in Figures 21 and 22. Upon a stud 104' fixed to the frame is mounted,
so as to rotate, a cam 105, which acts upon a segmental lever 106¹, and causes
it to vibrate twice during each revolution of the cam. The cam 105 carries a gear
wheel 103, which engages with a gear wheel 1021 upon the shaft of the cylinder. The
segmental lever 1061 is geared with a similar lever 107', which is pivotted on the
shaft of a multiplex ratchet wheel composed of two ratchet wheels 109 and 110¹,
and a cam disc 1111, and this lever 1071 carries pivotted to a stud projecting from it,
three pawls 112, 113, 1141. The ratchet wheel 110¹, in this instance, is provided
with thirty teeth, and it has attached to it, at one side, next to the ratchet wheel 109¹,
a guard disc 1161, having in its periphery one recess. The ratchet wheel 1091 in this
instance has thirty-one teeth, and between it and the cam disc 1111 there is a guard
disc 115, having one recess in its periphery. This ratchet wheel 109¹, guard
disc 115, and cam disc 111', are attached together as a single member. At each

page_text: revolution of the cylinder, the pawl 112¹ moves the ratchet wheel 1101 a distance: of
one tooth, during which revolution the pawl 1131 rides idly upon the plane periphery.
of the guard disc 1161, and the pawl 1141 rides idly upon the plane periphery of the
guard disc 1151. Thirty onward movements of the ratchet wheel 110¹ are thus made,
to cause it to complete one revolution, but as its revolution is completed at its
thirtieth movement, the pawl 1131 simultaneously drops in the single recess of the.
guard disc 116¹, and into one of the teeth of the ratchet wheel 109¹, so that at the
making of its thirtieth movement, or the completion of a revolution of the ratchet
wheel 110¹, the ratchet wheel 109¹ is moved one tooth. As the lever 1071 is again;
moved, the pawl 1121 will alone be active, the pawls 1131 and 114¹ riding idly upon
the plane peripheries of the guard dises 1161 and 115¹.
When thirty movements of the ratchet wheel 110¹ are again made, the pawl 113
will again move the ratchet wheel 109! one tooth. When this operation has been
performed thirty times, the pawl 1131, by moving the ratchet wheel-forward, will
move the projection 1171 on the cam disc 1111 into position to operate the lever 1181,
pivotted at 1191, which lever, at its free end, is pivotted to the bolt A, and presses.
the latter inwardly when it is operated upon by the cam 117', so that it will stand in
the path of the cams B and B¹. The bolt A is normally pressed outward by
spring 120 on the return stroke of the pawls, after the thirtieth complete revolution
of the ratchet wheel 110¹, and when the projection 1171 is in operative position, the
pawl 114 will drop into the recess of the guard disc 1151, and, upon its next
forward movement, it will move the guard disc and cam disc 1111 attached thereto;
so that the projection 1171 will be carried out of operative position, thus permitting the
spring 120 to withdraw the bolt A, before it has acted upon the second of the pair of
cams BB. This movement will also move the ratchet wheel 1091 onward its thirty-
first tooth. The gear wheels 1021, 103¹, and the number of the teeth upon the
ratchet wheel, are so adjusted to each other that the bolt A will be protruded
alternately at different parts of the revolution of the cylinder so as to operate i
alternately upon the cams B, B1, as will be hereafter pointed out.
In the construction illustrated in the drawings, the gear wheel 1021 makes two and:
one half revolutions to two revolutions of the gear wheel 1031, and the ratchet wheels
110 and 109¹ have.respectively thirty and thirty-one teeth. From this it results, that
nine hundred movements of the segmental-lever 1061 intervene between two successive:
operative positions of the projection 1171. Since the seginental lever 106' is moved
twice during each revolution of the cam 1051, this will be four hundred and fifty.
revolutions of the cam 1051, which is equivalent to five hundred and sixty-two and
one-half revolutions of the gear wheel 102¹ and the cylinder shaft. It therefore,
results, that the successive periods between operative positions of the projection 117:
begin with diametrically opposite points in the cylinder opposite to the bolt A.
course, a great variety of adjustments may be adopted for securing this result, and'
the frequency with which the bolt A is protruded by the counting mechanism may be.
fixed as desired. Thus, the reversal may be provided at each four hundred revolutions.
of the cylinder as hereinabove suggested, or at other periods. In the mechanism:
shown, the reversal occurs during each five hundred and sixty-second revolution.
Of.
This tripping bolt A, when moved (see Figures 2 and 5), is projected into thei
pathway of levers B, B1, and when said levers contact with the bolt A, they will rock
the segment arms 14, 15, and cause the segments 16 or 17, as the case may be, toi
rotate the pinion 18 on the shaft 19 carrying the cams D, D¹, which cams, as we have
heretofore seen, rock the oscillating frames 0, 0¹, and actuate the clutch mechanisms
connected with the tympan rollers T, R.
I.
In order to better illustrate this reversing operation, the diagrams Figures 14 to 17.
have been introduced. In the main illustrations, the mechanisins' are shown in the.
positions they have when the tympan web W. is being periodically shifted by being.
unwound from the tympan roller R, operating as a delivering roller, and wound ups
upon the tympan roller T, acting as a receiving roller, said positions having been
attained, by the movements illustrated in Figures. 14, 15, where (Figure. 14) the
lever B.is shown as contacting with the tripping bolt A, and, in passing over said.

page_text: bolt A, moving the mechanisms to the position shown in Figure 15, which is that
illustrated in the general views, and the one in which said mechanisms remain
during, say, two hundred, more or less, shifting movements of the tympan, or until
the reversing of the direction of the shifting movements of the tympan is to be
effected. It will be observed that when the lever B is moved as just described, it is
forced out of the pathway which intercepts the bolt A, while the lever B¹ is
simultaneously forced into the pathway, which will intercept that bolt A, when the
same is again protruded therein; the parts then standing as is indicated in Figure 15,
until it is required to reverse them.
and
When the reversing operation is to take place, and the tympan web is to be shifted
step by step in a contrary direction, the bolt A is protruded inwardly during the
appropriate, say, the four-hundredth revolution, and intercepts the lever B₁ carried
by the segment arın 15 as in Figure 16, thus causing the segment 17 to rock in the
direction of its arrow and to rotate the pinion 18 in the direction of its arrow,
consequently move the cam D¹ and its companion D in a like direction, said
mechanism being left standing in the positions shown in Figure 17, as the lever B¹
clears the bolt A, the lever B having been moved into the pathway of the bolt A,
ready to engage therewith, when said bolt is next protruded inwardly, or, as illustrated
in Figure 14. After operating the cam B¹, the bolt A is withdrawn by the cam 105,
before it engages with the cam B.
In the positions of the parts shewn in Figure 15, and in the main views (see
Figures 1 and 2), the cams D D¹ will, by contact with the friction rollers 2, 3; be
holding the spring arm 86, 87, and the bearers 84, 85, out of pressing contact with
the oscillating frames 0, 0¹, thus allowing the spring-seated bearers 82, 83, to press
against said frames, so as to cause the controlling roller L to bear upon the rolled
tympan web V on the tympan roller R, and the cam D to bear upon the rock arm 12,
so as to cause the tappet 76 to bear on the lug 75, and thus uncouple or relieve the
clutching mechanism connected with the shaft of the tympan-unwinding or delivering
roller R, and simultaneously allow the companion rock arm to move the tappet 76
away from the lug 75, and allow the spring-seated rod 74 to move the ring 70, and
thus render active the friction clutch connected with the tympan wind-up or
receiving roller T.
Now, when the reversing operation is to be effected, as illustrated in Figures 4, 16,
and 17, the cams D, D¹, will relieve the spring seated bearers 84, 85, so that by
their contact with the oscillating frames 0, 0¹, they will move the same into a
position that will carry the controlling roller K into, and hold the same in, spring-
pressed or frictional contact with the rolled web V, now wound up upon the tympan
carrying roller T, now acting as a receiving roller, simultaneously moving the spring
bearers 82, 85, out of pressing contact with said oscillating frames 0, 01, and holding
the same in that position during the four hundred revolutions referred to.
Simultaneously, the cam D allows the rock arm 12 to swing the tappet 76 out of
contact with the lug 75 on the ring 70, thus permitting said ring to move under the
driving action of its spring-seated rod 74, and render active the friction clutch
connected with the shaft of the tympan carrying roller R, and simultaneously this
cam D moves the companion rock arm 13, to perform the reverse operation upon the
ring 70 of the clutch mechanisin connected with the tympan carrying roller T, thus
unclutching the same by bearing the tappet 76 upon the lug 75 against the pressure
of the spring-seated rod 74.
In these positions, the frictionally-pressed controlling roller K will become active
as the means through which the shifting movement of the tympan in the contrary
direction is effected, the same being driven through the action of the sprocket chain
32, and the operation of the various parts being the same as has heretofore been
described with respect to the movement of the tympan in the opposite direction. In
this movement of the tympan, the tympan carrying roller T becomes the delivering
roller, and the tympan-carrying roller R becomes the receiving roller, which tympan-
shifting operations are carried on until the time arrives when the tympan web upon
B

page_text: the tympan-delivering roller T is about being exhausted, and requires to be shifted
in the contrary direction, at which time the mechanism controlling the tripping bolt
A acts to thrust the same into the pathway of the lever B, reverse the mechanisms,
and cause the first shifting-operation described to be again performed.
It is obvious that the clutching mechanisms may have substituted for them other
appropriate constructions, but it is to be observed that the action of the clutching
mechanism connected with each of the tympan-carrying rollers T, R, is to transmit
the power that drives the one of said rollers which is acting as a wind up or
receiving roller, and as this power is applied through the pinions 60, 61, and the
size of the roll V of tympan web constantly varies, while that of the said pinions
is a fixed quantity, it results that the said clutches must be of such a construction as
to allow a slipping between the loose and fast parts thereof, when so far coupled as to
be in driving contact. It is obvious that, by shortening the length of the fixed
governing guard, or cam guide, 52, in any of the common ways of making cams
capable of a longer and shorter activity, the duration of the time when the tympan
moves may be increased, and thus its shifting extent be lengthened. One good way
of accomplishing this result is by having removable parts, or one part sliding upon
another, to fixed positions or passages through the said guard or guide, controlled by
a switch, would be effective, and in illustration of this, the modification where one
part of the governing guard or cam guide 52 slides upon another part, showing
the same in Figures 18 to 20, has been selected. Here the main part of this
guard or guide 52 is fixed, and its forward portion 90 is divided widthwise, so as
to form a way upon which a detached or separable portion 91 of said guard may
slide circumferentially, the same being provided with an arm 95, for receiving a
fastening screw 93, the shank of which runs in a slot 92 formed in the web of said
wheel 62. This movable portion 91 may thus be adjusted at any required position
within the limits of its inovement, indicated by the dotted lines in Figure 18.
Furthermore, when the guard or guide cam 52 is thus capable of a number of
adjustments, this governing of the extent of movement of the tympan may be aided
by increasing the size of the sproked wheel driving the chain 32, so that the tympan
may be moved a greater or less distance than is normally provided for its shifting
action by the mechanisms as illustrated.
Figures 23 to 42 represent a machine which is a second embodiment of the
invention. This machine contains various modifications, and one of the principal
consists in the provision of feeding or driving rollers independent of the tympan rollers
by which the tympan is moved.
In the drawings:-
:-
Figure 23 represents an end elevation of an impression cylinder of a printing
machine provided with a tympan-shifting mechanism embracing this modification
of the invention, the view being taken on the section line 23 of Figure 26, just within
the frame of the machine, as seen looking in the direction of the arrow 23 in that
figure.
Figure 24 represents an elevation of the opposite end of said cylinder, the view
being taken on the section line 24 of Figure 26, just within the frame of the
machine.
Figure 25 represents a vertical sectional elevation of said cylinder and its
mechanisms, the view being taken on the section line 25 of Figure 26.
Figure 26 represents a side elevation of said cylinder (shaft omitted), as seen
when in the position of its rotation shown in Figures 23 and 24, and looking in the
direction of the arrows 26 in said figures, the friction clutch applied to one of the
paper rolls being drawn in section, to expose its inside construction.
Figure 27 represents a sectional plan view of said cylinder, said view being taken
on the irregular section line 27 of Figure 23.
Figure 28 represents a horizontal sectional plan view of one of the clutch
mechanisms.
Figure 29 represents an enlarged vertical sectional elevation of one of the friction
clutches which operate in connection with the tympan-carrying rollers, the view being

page_text: :
taken on the line 29 of Figure 31, as seen looking in the direction of its attached
arrow.
Figure 30 represents the same by a similar view, but showing the operative parts
in different positions.
Figure 31 represents à partial side elevation and partial vertical section of the same,
as seen looking in the direction of the arrow 31 in Figure 30.
Figure 32 represents the bearing hub in position in the head of the cylinder, and
shows a part of the clutch in section, the view being central on the line 32'of
Figure 30.
Figure 33 represents an enlarged vertical sectional elevation of the friction driving
clutch for moving or shifting the tympan, the view being taken on the section line 33
of Figure 34.
Figure 34 represents and enlarged horizontal section of the same, taken on the
line 34 of Figure 33.
Figure 35 represents an enlarged vertical sectional elevation of the same, taken on
the line 35 of Figure 33.
.
Figure 36 illustrates detached parts by side elevations.
Figure 37, represents, on a diminished scale, so much of a side elevation of a
printing machine as is necessary to illustrate one.end of the impression cylinder, and
the attachments for setting the tympan moving or shifting mechanisms at: each
second revolution of said cylinder.
:
Figure 38 represents upon the same scale a sectional elevation of the parts shown
in Figure 37, the view being taken on the section line 38 of said figure, some of the
attachments being wholly in elevation.
Figure 39 represents an end elevation of the machine, same scale as Figure 33, of
so much of the machine as is necessary to illustrate a reversing apparatus whereby
the tympan moving or shifting mechanism is made to operate in both directions.
Figure 40 represents on the same scale a side elevation of one end of said impression
cylinder and reversing apparatus.
Figure 41 is a vertical sectional elevation of the ratchet wheel of the reversing
mechanism.
Figure 42 represents, by an enlarged perspective view, the pawl and ratchet feed
of the reversing apparatus.
In some of the figures, parts are omitted in aid of perspicuity, and where section
lines appear, their attached arrows point in the direction in which the view is seen.
It may first be stated that while this invention is applicable generally to impression
cylinders, it is most usefully employed in connection with the second impression
cylinder of a perfecting printing machine. These improvements are, therefore,
herein shown as applied in connection with such an impression cylinder, which, for
convenience of the support and carriage of the devices and mechanisms, consists of
two heads, C, D aud an interinediate shell or curved bearing plate, which affords an
impression surface E, over which the tympan W is stretched and moves, and a recess
or opening into which the ends of the tympan enter, to be wound and rewound,
and through which the tympan-carrying and tympan-feeding rollers may be
.reached.
This cylinder is mounted. fast upon its shaft 199, which turns in bearings supported
in the framework, as is usual, and will have, operating in connection with it, a first
impression cylinder, and suitable co-operating mechanisms whereby the printing
operations are effected,, and which may be of various structures, said impression
cylinders and co-operating mechanisms being provided with means for appropriately
driving them.
The various mechanisms associated with this second impression cylinder whereby
the tympan is operated, will first be separately described, in order that the operation
of the whole may be readily understood when it hereinafter set forth. The impression
cylinder is provided with tympan-carrying rollers R, T, about which the tympan. W
is wound, it being rewound from one to the other during its shifting operation in
both directions, as will hereinafter appear, each of said rollers thus acting at times

page_text: as a winding-up or receiving roller, and as a paying-out or delivering roller, which
junctions are reversed when the movement of the tympan is reversed. As illustrated
herein, the tympan roller R is acting as the paying out or delivering roller, and the
tympan roller T is acting as the winding-up or receiving roller, the tympan thus
moving in the direction of its associated arrows. The rolled up tympan upon these
tympan-carrying rollers, as indicated by dotted lines in Figure 23, is marked with
the designating letters R, T, in that figure, so as to readily distinguish their positions
therein. This cylinder is also provided with two sets of measuring or feeding
rollers 124, 125 and 126, 127, whose shafts are marked with the roller numbers in
Figure 24, so that their relation to other parts in that figure may be readily under-
stood. The pairs of rollers are situated near the tympan carrying rollers R, T,
respectively, and when the operation to move or shift the tympan, both act to move
it in the same direction.
The tympan-carrying rollers R, T, have their shafts journaled in bearings in the
cylinder heads C* D*, so that said rollers may rotate therein while making the rotative
circuit of said cylinder.
The shafts of the tympan-carrying rollers R and T each have one end turning in
a bearing composed of a a curved seat 10111 and a bearing block 1021, a retaining
block 103 and a holding screw 104, and, at their other ends (see Figures 27
and 32), each of these shafts projects through a journal box 157, that is supported
in the cylinder head Cx by means of a curved seat, a bearing block 10511, a retaining
block 10611, and a holding screw 10711 (see Figure 27), by means of which holding
devices said rollers, their shafts, and associated parts, may be bodily removed. The
shaft 153 of the tympan carrying roller R is provided on its outer end with a
pinion 107 loose thereon, which meshes with a stationary circular rack or wheel 180
(see Figure 26), and the shaft 158 of tympan-carrying roller T carries loose on its
outer end a pinion 108, which also meshes with said wheel 180 (see Figure 27),
which pinions are fast to the loose members of the clutches.
The journal bearings 157 of the tympan-carrying rollers R and T are enlarged (see
Figures 27 and 32), where they protrude beyond the cylinder head Cx, to form hubs,
that in part support the friction clutches with which the tympan roller shafts are
provided. The shaft 153 of the tympan roller R has a friction clutch X mounted
upon its shaft between its pinion 107 and the cylinder head Cx, and the tympan
carrying roller T has a friction clutch Y mounted upon its shaft 158, between its
pinion 108 and the cylinder head Cx, and each shaft is provided, near its opposite
end, with a brake pulley, as 169, 170 (see Figures 25 26, 27), which are operated
upon by brake shoes 171, 172, that are pivoted to the arms of a double lever 191,
fulcrummed to the cylinder Dr. Between the arms of this lever 191, there is a
double-armed spring 193, fast to a small bell-crank 194, pivoted to the cylinder
head D*, the ends of which spring may bear upon adjusting screws carried at the
. end of each lever 191, and which spring is rocked by means of a cam 192 fast
upon the shaft 190.
The high parts of this cam 192 act alternately upon the
ends of the bell-crank 194, to cause the application of the brake shoes 171, 172,
the movement being such as to apply the brake to the shaft of the tympan
roller, that is, acting as the paying-cut roller, for the purpose of applying suit-
able tension thereto, or prevent its overrunning the spring 193 causing the brake
shoe to be applied with an elastic pressure.
The wheel 180, which normally acts as a stationary circular rack, is mounted
so as to be rotative at times upon a stationary hub 181, which is secured to the
inner face of one of the stationery journal boxes of the cylinder by means of
bolts 179 (see Figures 23 and 27). It is prevented from moving in the direction in
which the cylinder turns when rotating during the printing operation, by means of
its spring-seated pawls 182 that engage ratchet teeth 106 in the peripheral face of
said hub 181, but may move in the opposite direction, if the cylinder is turned
backward.
When the cylinder revolves during the printing operation its direction of
movement is that of its associated arrow, and the wheel 180 will be maintained

page_text: stationary while the pinions 107, 108 and 109, whose applied movements are yet to
be referred to, will be caused to rotate in the direction indicated by their arrows;
but if the cylinder is reversed, as is necessary at times in making ready for printing,
this wheel 180 being free to move in that direction, will thus nove upon its hub 181
concertedly with said pinions, which are carried with the cylinder, without imparting
rotative movement to them for the reason that these pinions bear frictinally thereon
sufficiently to carry this wheel 180 with them in their movement, when making a
'backward circuit with the cylinder, and thus not rotate themselves at this time,
which movement of them would move the tympan out of place.
The measuring or feeding rollers 124, 125, and 126, 127, have their shafts mounted
in journals in the cylinder heads C, D, and their shafts project beyond the
cylinder head D*, outside of which they are respectively geared together, to revolve
in unison by means of pinions 138, 139 and 140, 141, the pinions 138 and 140
meshing with a wheel 160, whose hub 159 einbraces the shaft 199 of the cylinder,
and upon which shaft said wheel 160 may freely revolve in both directions. This
wheel 160 acts as part of a train of gearing actuating the feeding or measuring
rollers, and it is driven through an intermediate 161 that gears with pinions 162
and 163, by one or the other of which it is driven, when it moves according to which
one of the pinions is then active as the driver. The wheel 162 runs free upon a
stud 168 fast to the cylinder head D, and pinion 163 is loose upon a shaft 164. The
stud 168 also carries a wheel 165 loose upon it, and shaft 164, wheel 166 fast upon it,
said wheels 165, 166 being of the same size and maintained in gear. Upon each of
the hubs of the wheels 165 and 166 is a clutch member as 147, 148, that slides on a
spline, & coacts with a fast clutch member, as 149, 150, fast to the wheels 162, 163,
respectively. The details of construction of one of these clutches is shown in
Figure 28, while Figure 27 shows the relation of both to the parts with which they
are associated. The sliding movement of the movable clutch members 147, 148, is
effected by an oscillating shaft 173 journaled in the cylinder head Dx, and having a
rock arm 174 that extends into a slotted cam 156 on the cam shaft 190. Said
shaft 173 carries fast, at its outer end, a two-armed lever 175, toes from the ends of
which lever arms respectively enter a peripheral slot in the loose members 147, 148
of the clutch mechanisms, and thus alternately throw one of the clutches into couple,
and simultaneously cause the uncoupling of the other parts.
This clutching operation is perforined after long intervals, and is controlled by
means of a tumbler cam 167 on the outer extremity of the shaft 190, which shaft
makes a quarter turn each time it is operated upon, and carries all the cams that
operate upon the levers, whose functions are to change the direction of the movement
of the tympan, and the cams are of such shape that upon each such quarter
turning of the shaft 190, the change is made. This tumbler cum 167 (best seen
in Figure 40) is actuated through means of a tumbler pin 136, which is projected
through the side frame, to enter one of its four recesses, and be withdrawn there-
from, in manner as will hereinafter more fully appear.
The shaft 164 is journaled in the cylinder heads, and projects at that end opposite
to its end carrying the wheel 163, far enough to support a pinion 109, that meshes
with, and is driven by, the wheel 180, in like manner as are the pinions 107, 108,
said shaft 164 has a friction clutch Z interposed. between its pinion 109 and the
cylinder head C. This pinion 9, as well as the pinions 107 and 108, will, for the
reason that their carrying shafts make the rotative circuit of the cylinder, thus be
caused to roll in the teetli of the then stationary circular rack or wheel 180, and
hence be uniformnly driven rotatively thereby, and they respectively are fast to, and
hence drive, the loose members of the clutches X, Y, Z.
The friction clutch X causes the movement of the tympan roller R, the friction
clutch causes the movement of the tympan roller T, and the friction clutch
causes the movement of the measuring rollers 124, 125 and 126, 127. The
clutches X, Y are controlled in their action by a reversing cam 188, with which the
clutch levers 187, 187 coact, said cam 188 being fast upon the shaft 190; and,
the clutch Z is controlled in its action by a cain 183, which is provided with a hub 198

page_text: embracing the shaft 199, said cain 183 being capable of a lateral or sliding movement
upon the shaft, as seen in Figure 38, and being prevented from rotating by a pin 184,
which is bolted to it, and sliding in the cylinder journal box, and through the ratchet
.hub 181 of the wheel 180.
The friction clutches X, Y, Z, are in general construction and mode of operation
alike, and for this reason corresponding parts in each are designated by the same
letters of reference, in order that the description of one may in part be read upon the
!
other.
The structure and action of the clutches X and Y will be understood from the
following detailed description of one of them, in connection with Figures 29, 30, 31,
and 32.
As appears in Figure 31, the shaft 153 of the tympan roller R turns in a journal or
bearing hub 157, supported by the cylinder head Cx, which journal or bearing hub 157
(see Figure 32) has its outer end formed as a hub, to aid in supporting the movable
parts constituting the internal member of the clutch. The internal, or fast member
of the clutch, cousists of a circular plate 113, provided with four radially projecting
tongues 103, each of which enters into a slot in one of the segments constituting a
ring 114, which rests just within the shell or outer member 110, which ring 114 is
made segmental, in order that it may expand, and be pressed outward forcibly against
the inner periphery of the shell of the outer loose or driving member 110.
This internal or fast member 113 is provided with a central circular hub, which
is of a size to enter within the journal bearing 157, and embrace the shaft 153, to
which it is made fast by a key (see Figures 29, 30, and 31.
Arranged at a distance within, and concentrically with this segmental ring 114, is
a split ring 115, and the space between the segmental ring 114 and the split ring 115
is filled with anti-friction rollers 101. This split ring 115 has two lugs 102, 104,
projecting inwardly from it, one at each side of its split portions, which cooperate with
rolls 116, 117, as will appear.
The roll 117, is pivoted to the stationary journal box 157 (see Figures 29, 30,
and 32), so as to be aligned circumferentially with the lug 104 of the split ring. 115,
and the roll 116 is pivoted to the enlarged journal plate of the lever 187, and projects
therefrom (see Figure 31) within the body of this clutch, so as to protrude into
circumferential alignment with the lug 102, the hub of the journal box 157 being cut
away (see Figures 29, 30), to permit of the circumferential movement of the roll 116
carried by the lever 187.
The outer shell or loose member 110 has keyed to it the pinion 107, and turns
freely on the shaft 153. It is cup-shaped, to provide it with an inwardly projecting
flange that overlies the ring 114, and thus envelopes the internal members of the
'clutch.
The enlarged journal of the operating lever 187 of the clutch swings upon a stepped
•portion of the journal box 157 (see Figure 32), and carries, at its outer end, an anti-
friction bowl, which is borne upon by the cam 188. This lever 187 is moved to carry
the movable devices of the fast member of the clutch into clutching action with
respect to the loose member by means of a spring 146, the heel of which is fixed by
bolts securing it to the cylinder head C, and the free end of which bears upon an
adjustable screw that protrudes from a lug 11111, which projects at one side of said
lever 187, and the contrary movement of these parts is compelled by the cam 188.
It will now be understood that when the high part of the cam 188 bears against
the lever arm 187, and thus holds said lever against the pressure of the
spring 146, as in the position shown in Figure 29, the roll 116 carried
by said lever will be swung out of contact with the lug 102 on the split
ring 115, thus enabling said ring to collapse sufficiently to remove the
pressure it exerted upon the segmental ring 114, through the non-friction
rollers 101, and thus allow inward movement of the segments of the ring 114 to such
an extent as to relieve them from exerting any friction upon the loose member 110
of the clutch, whereupon said loose member will run free without affecting the
'shaft. 153. In other words, the clutch will be inactive. When, however, the cam 188

page_text: is turned so as to present its low part to the lever arm 187, as in Figure 30, the
spring 146 will, by its pressure, swing the said lever and the parts it carries into the
position shown in Figures 30 and 31. This swinging movement of the lever 187 will
press the roll 116 it carries against the lug 102 of the split ring 115, and thus,
coacting with the fixed roll 117 carried by the stationary journal box 157 and held
against the lug 104 of said split ring, cause the same to be spread and enlarged
in its circular extent, so as to press, through the anti-friction rolls 101, the seg-
ments 114 outwardly into contact with the inner surface of the circular rim 110 of the
loose member of the clutch, and to exert such a frictional pressure thereon as to cause
the fast members of the clutch to turn with the said loose member, whence it follows
that the motion of the latter applied to it from the wheel 180, through the pinion 107,
will be imparted to the shaft by a frictional connection, the power of which is
determined by the pressure of the spring 146, which latter may be adjusted by the
adjusting screw 1501.1.
The friction clutch z is best illustrated in Figures 33, 34, 35, and 36. Its outer
shell or loose number 112 has keyed to it the pinion 109, and with it turns freely on
the shaft 164. The internal or fast member 113 is keyed to said shaft 164, and is
provided with four radially projecting tongues 103, which each enter segments of a
ring 114 that rests just within the shell or outer member 112. This ring 114 is made
segmental, in order that it may expand and be pressed forcibly against the inner
periphery of the loose member 112. Arranged concentrically within this segmental
ring 114, is a split ring 115, and the space between the segments 114 and this split
ring 115 is filled with anti-friction rolls 101. This split ring 115 has two lugs 102,
104 projecting inwardly from it, one at each side of its split portions, in connection
with which two rolls 116, 117, co-operate. The roll 116 is pivoted to the enlarged
journal plate of the lever 186, and projects therefrom and within the body of this
clutch, so that it bears behind the split ring 115 (see Figure 34), and the roll 117 is
pivoted to the journal bearing 118 of this shaft 164, and projects therefrom through'
a recess in the journal plate of the lever 186, and extends behind the split ring 115
(see Figure 35). These rolls 116, 117, are so related thereto, that they will be
contacted with by the lugs 102, 104, whenever the lever 186 of this clutch is properly
moved. When so moved, the roller 117, will fold the ring 115 in one direction, and
the roller 116 will move it in the other, thus expanding it circumferentially, and,
through the anti-friction rollers 101, forcing the segmental ring 114 outwardly, into
such frictional contact with the loose member 112, as to cause the same to be clutched
to the shaft 164, and thus enable the driven pinion 109 to impart motion to the
shaft 164.
The journal bearing 118, which is bolted fast to the cylinder head Cx through lugs,
as shown in Figures 23 and 33, has said lugs provided with slots whereby its fastening
bolts may be loosened, and the position of said journal bearing may be rotatively
adjusted so that the extent of expanding movement applied to the split ring 115 by
the lever 186, aided by the roll 117, may be regulated, and the pressure exerted by
said ring, when it is expanded circumferentially, be adjusted to a nicety, which
position of adjustment is fixed by means of an adjusting screw 14011 and
lugs 141, 14211, fast to the cylinder head. The clutch is put into action by lifting
the lever 186, which is hung to vibrate upon the journal bearing 118 of the shaft 164,
and held depressed by a spring-seated rod 122, that constantly forces this lever
inwardly. This lever is raised to apply the clutch by means of the cam 183, which
is moved inwardly, or into the position of Figure 116, to engage the roll 185 while
the low part of said cam is passing this roll. When this roll rides over the high part
of the cam, it presses the lever 186 outwardly, and, by expanding the split ring 115,
causes the segments 114 to press against the loose member 112, and thus to so
frictionally connect the fast and loose members of said clutch, that the shaft 164 will.
be rotated, and cause the feed rollers 124, 125, and 126, 127, to be driven at a
uniform speed during the whole of the time that said roll is running over the high
part of this cam.

page_text: move the
A brake wheel 119 is fast to this shaft 164, just within the cylinder head Cx, and
has acting upon it a brake shoe 120, from which extends an arm 123, hung on an
excentric pin 121, journaled in the cylinder head Cx, and rocked to
brake shoe to and from the brake wheel 119 by a rock arm 129, which latter has,
at its outer end (see Figure 36), a laterally enlarged bearing for the play of the
end of a driving stud 105, that projects from the lever 186. This stud 105 is
adjustable in a vertical slot provided in the lever 186, so that the degree of
pressure exerted upon the brake may be nicely regulated.
This rotative movement of the said rollers 124, 125, 126 and 127, determined by
the cam 183, causes the tympan to be moved or shifted over the impress on surface
of the cylinder, and to be transferred from one tympan roller, as R, to the other
tympan roller, as T, at each second revolution of the cylinder, and it controls or
measures the length of tympan which is thus fed, and thus shifted from one to
the other.
It will be understood that in this tympan-moving or shifting operation, the clutch Y,
which is in active operation, as shown, simultaneously drives the shaft, 158, and
causes the tympan roller T to wind up the tympan as long as the roll of its lever 187
is opposite to the low part of the reversing cam 188, in which position of the parts,
the spring 146 forces the lever 187 to expand the split ring 115, so that it forces the
segment ring 114 to frictionally clutch its outer or loose member 110; also, that
during this movement of the tympan, the friction clutch X is inactive, and so
remains, as long as the roll of its lever 187 is pressed upon by the high part of the
cam 188, in which position it allows the split ring 15 of this clutch to contract, and
thus enables the segment rings 114 to be relieved of frictional pressure upon the
loose member of the clutch.
The mechanism for causing the shifting operation of the tympan to be
performed at each second revolution of the cylinder, or, in other words, the
mechanism for controlling the active and inactive positions of the cam 183, is shown
in Figures 37 and 38. This cam is moved into active position at the appropriate
time by means of an oscillating inclined-faced lever 128, which is pivoted to the
side frame in such position as to play in the slotted head of the stud 184. The
rocking motion of this lever 128 is caused by a cam 142 on a cam shaft 100 at the
lower part of the machine, which shaft makes one revolution to two of the impression
cylinder, and moves the lever 128 by means of a connecting rod 143, which is
attached at its upper end to a rock arm on the shaft of the lever 128,
and at its lower end carries a stud which bears upon the face of the cam 142,
where it is held to duty by means of a spring rod 144, and an intermediate bell-
crank attached to said rod 143. A hook 145 is provided to hold the cam lever up,
and prevent movement of the rock lever 128, when that effect is desired.
The mechanism for causing the reversal of the direction of the run of the tympan
at the end of a desired or predetermined number of revolutions, is illustrated in
Figures 39 to 42. The cylinder shaft 199 carries, near its outer end, a cam 130,
which acts upon a segment lever 131, and causes it to vibrate once during every
revolution of the cylinder. Said lever 131 is geared with a similar lever 132, which
is pivoted on the shaft 151 of a multiplex ratchet wheel, composed of two ratchet
wheels 176, 177, and a cam disk 178, and this lever 132 carries, pivoted to a stud
projecting from it, three pawls, 133, 134, 137.
The ratchet wheel 176 in this instance, is provided with twenty teeth, and it has
attached to it at one side, next to the ratchet wheel 177 a guard disk 195 having one
tooth. The ratchet wheel 177 in this instance has twenty teeth and between it and
the cam disk 178 there is a guard disk 196 which has one tooth. This ratchet
wheel 177, guard disk 196, and the cam disk 178, are attached together as a single
member.
At each revolution of the cylinder, the pawl 133 moves the ratchet wheel 176 the
distance of one tooth, during which revolution the pawl 134 rides idly on the plane
periphery of the guard disk 195, and the pawl 137 rides idly upon the plane
periphery of the guard disk 196. Twenty onward movements of the ratchet wheel 176

page_text: are thus made to cause it to revolve once, but as its revolution is completed at
its twentieth movement, the pawl 134 simultaneously drops into the single tooth of
of guard disk 195, and into one of the teeth of the ratchet wheel 177, so that at the
making of its twentieth impulse, or completion of a revolution of the. ratchet
wheel 176, the ratchet wheel 177 is moved one tooth. As the pawls again move,
the pawl 133 will alone be active, the pawis 134, 137, again riding idly upon
the plane peripheries of the guard disks 195 and 196. When twenty movements:
of the ratchet wheel 176 are again made, the pawl 134 will again move the
ratchet wheel 177 one tooth. When this action. has been performed nineteen
times, the pawl 134, by moving the ratchet wheel 177 forward one tooth, will
move the projection 152 on the cam disk 178, which is attached to the ratchet
wheel 177, into position, to operate the lever 135, which is attached to the spring-
seated stud 136, and press the latter inwardly, so that it will engage a tooth of.
the tumbler cam 167, which, thus engaged, will cause the shaft 100 to makė
one quarter revolution.
On the return stroke of the pawls, after the nineteenth complete revolution of the
ratchet wheel 176, and when the projection of the cam disk is in operating position,
the pawl 137 will drop into the tooth of the disk 196, and, at its next forward move-:
ment, it will move the projection on the cam disk to which it is attached out of:
operation, and thus prevent the reversing action of the stud 136. It will also move
the ratchet wheel 177 onward its twentieth tooth. Thus, it will be seen that the:
projection will be in position every three-hundred-and-eightieth revolution of the
cylinder (20 times 19), and remain in position only through one revolution.
It being understood that this second or tympan cylinder makes turn for turn with.
the first impression cylinder; receives the once printed sheet at its alternate revolutions,.
at which time it carries the sheet through its second or perfecting impression, and
thus has the freshly-printed first side of the sheet bearing upon the tympan, and
that during a predetermined number, say, three hundred and eighty revolutions of
this tympan cylinder, the tympan is to be shifted onward a form's length at a time,"
during which, the reversing shaft 190, which, though moved rotatively with the
cylinder, maintains the fixed position of its own rotation therein, shown particularly:
in Figures 23, 24, 25, 26, in which position it is held by the spring lever 154 fast to
the shaft 199, and taking into one of four notches in the pulley 155, carried by thei
shaft 190 (see Figures 24, 28, and 29), which shaft 190, thus maintained fixedly,
holds the clutch X out of action, allows the clutch Y to be in action, or clutched to
the shaft 158, maintains the cam 156 stationary, and thus holds the wheels 165
and 162 clutched together, so that the train of wheels 166, 165, 162, 161, may act to
drive the wheel 160, and, through it, the wheels 138, 139 and 140, 141, and, also,
that the tympan W is then, when shifted through this train, moved in the direction:
of its arrow, being unwound from the roller R, and wound up upon the roller T, and,
further, that the friction clutch Y,-which couples the pinion 108 to the shaft of
roller T, is then in action, so that that pulley may drive it, and that the friction clutch X,
associated with roller R, is then out of action :-the following description of the
operation will be clear.
"
;
As soon as the sheet, a second time printed by the co-action of this tympan
cylinder, has, in its movement for delivery, passed off from the impression surface:
of this cylinder, which, it will be observed, occupies about one half of the
circumferential extent of its periphery, and the tympan cylinder is beginning its
revolution, during the making of which the first impression cylinder is, by its
alternate revolution, printing the first-side of the sheet, the tripping mechanism
(Figures 37, 38), which moves the stud 184, will projects the same inwardly, thus
carrying with it the cain 183, which will thus be brought into a vertical pathway,
which will cause it to hear upon the roll 185 of the lever 186, as seen in Figure 37.
When this roll 185 mounts the high part of the cam 183, it will move the lever 186
outward against the resistance of its spring rod 122 as in Figure 1 and thus set the
friction clutch Z into action, whereupon the motion of the pinion 109, turning on
0

page_text: the wheel 180, will be applied to the shaft 164, which, through the wheel 166,
rotates the wheel 165, which latter, then clutched to the wheel 162, will drive
the wheel 160 through the intermediate 161, and thus rotate the wheel 160,
which in turn will revolve the wheels 138, 139 and 140, 141, on the shafts
respectively of the feeding rolls 124, 125 and 126, 127, thus causing these
rollers, together with the action of the winding-up clutch Y, to move or feed the
tympan W, the pair of rollers 124, 125 to draw off or unwind the tympan from
the roller R against the resistance afforded by the brake shoe 171, then applied
to it, and causing the pair of rollers 126, 127 to move uniformly onward, to
move or feed it to the wind-up roller T, which latter winds it up by rotation
imparted to it by the pinion 108 through the clutch Y, these operatious causing
the tympan stretched over the impression surface of the cylinder to be moved or shifted
over the same to an extent equal circumferentially to the bearing which the form has
thereon. The length of the high part of the cam 183 corresponds with this circum-
ferential extent, and when the roller 185 passes off the high part of this cam (after
which the cam is withdrawn by the oscillating lever 128), the lever 186 is moved
inwardly by its spring rod 122, which movement of the lever 186 opens the clutch Z,
and simultaneously applies the brake shoe 120, to suspend rotary movement of the
shaft 164, and (see Figure 24) the movement of the wheels, 162, 161, and 160, 138,
139, 140, and 141, and consequently suspends the feeding action of the tympan
rollers 124, 125, and 126, 127.
The tympan W is thus, at every second or alternate revolution of this second
impression cylinder, shifted over its surface, to a distance equal to the space occupied
by the impression of the form, whereby is presented an entirely clean tympan surface
for the offset during the second printing, and this operation is repeated, say, three
hundred and eighty times, at the end of which the tympan web will have been
unwound from the roller R, and will have been rewound upon the roller T, whereupon,
in order to shift this tympan, in a like manner, in the opposite direction, and thus
transfer the tympan web from the roller T to, and wind it up upon, the roller R, the
reversing mechanism (Figures 39 to 42) comes into action, to impart a quarter turn
to the shaft 190, by moving the tappet pin 136 into engagement with the tumbler
wheel 167 through the action of the cam projection 152 on the shaft 151, the result
being that this tumbler wheel 167 will be moved a quarter turn in the direction of its
arrow in Figure 24, and secured by the spring lever 154 falling into the notched
periphery of the pulley 155. This tumbler wheel 167 is shown in dotted lines in
Figure 24, to illustrate this operation. This movement of the shaft 190 will swing
the reversing cam 188 in the direction of its associated arrow in Figure 23, and cause
its enlarged part to move the clutch lever 187 on clutch Y into a position correspond-
ing to the position the clutch lever 187 has with respect to the clutch X, and allow
the clutch lever 187 of the clutch X to overlie the low part of the cam 188, in like
position as the clutch lever 187 is shown with respect to the clutch Y in full lines in
Figure 23.
This action couples or sets into operation the clutch X, to cause the
tyimpan roller R to act as a wind-up roll, and releases the clutch mechanism Y, so
that the tympan may pass off from the roller T, and the cam 192 simultaneously
through the bell crank 194 applies the brake shoe 172 to the brake pulley 170 on the
shaft of roller T, so as to maintain an even tension upon the tympan W in its move-
ment therefro:n, and relieves the brake pulley 169 on the shaft of roller R from the
pressure of the brake shoe, 171, thereon, thus leaving said wind-up roller R wholly
within the control of its clutch X. This rotary movement of the shaft 190 also
simultaneously causes a quarter turn of the cam 156, which, through the rock arm
174, oscillating shaft 173, and two-armed lever 175, (see Figures 26 and 27), slides
the moving members 47, 48 of their respective clutches in a direction that causes the
wheel 162 to be unclutched from the wheel 165, and the wheel 163 to be clutched to
the wheel 166, so that, when motion is imparted to the shaft 164, the wheel 166, fast
upon the shaft, will, though moving the wheel 165 idly, actively rotate the wheel 163,
and, through it, wheel 161, in a direction opposite to that which it formerly had, and
thus impart such opposite movement of rotation through the wheel 160 to the wheels

page_text: 139, 138, and 140, 141, whereupon such movement will shift or carry the tympan W
in a direction opposite to that in which it is illustrated as moving generally in the
drawings, the result being, since the tappet pin 136 is quickly withdrawn, that the
shaft 190, and the parts it controls, will stand in the last-described positions during
the next three hundred and eighty revolutions of this cylinder, during which, said
tympan W is progressively shifted a form's length at a time over the impression sur-
face of this second impression cylinder, whereupon the tappet pin 136 is again operated
to repeat the reversing operation, and cause the tympan, when moved, to move in
the direction first described. Only one of the rollers of the pairs 124, 125 and 126,
127, needs to be driven positively, as its companion may be driven from the other,
and yet move the tympan. Although advantageous to have the driving wheel of
the companion rollers 124, 125, and 126, 127, constantly geared to wheel 160, so that
both will be positively driven when either is moved, it will be apparent that only one
set need be driven when the tympan is moved, the other set being disengaged, as by
throwing out one of its gears, so that it will be moved by the tympan only, one or the
other set being thus disconnected according to the direction in which the tympan is
moving.
Figures 43 to 47 illustrate a machine which is a third embodiment of my inven-
tion, and which illustrates various modifications thereof. The principal one of these
modifications relates to the mechanism for determining the extent of movement of the
tympan in one direction, and for controlling the operation of the reversing mechanism
by which the direction of movement of the tympan is automatically changed. In this
modification, the operation of an automatic reversing mechanism is governed by the
size of one of the rolls of tympan, and preferably by the size of the delivering roll,.
or the roll from which the tympan is being unwound. The time of the change of
direction of the movement of the tympan being thus determined by the size of one
of the rolls of tympan, and especially when determined by the size of the delivering
roll, all danger of the movement of the tympan in one direction being continued too
long is avoided; the tympan may be used almost to the end before reversal, and
tympans of different lengths may be employed equally well; whereas the reversing
mechanisins in which the reversing is made at the end of a predetermined number
of shifting movements, the tympan must be of a length at least sufficient to permit
that number of movements before reversing, and, moreover, the tympan is liable to
be taken up a trifle more when it is moved in one direction than when it is moved in
the other, which might result after repeated reversals in the drawing of the tympan
entirely off from one of the rolls before the time for reversing, so that it is
desirable, in such constructions, to allow a considerable surplus of length of tympan,
in view of this possible gradual movement of the tympan toward one of the
rolls.
It will be seen also that the invention provides an efficient means for preventing
the tympan being drawn entirely off the tympan rollers by controlling the extent of
feed of the tympan in one direction, by the size of one of the rolls of tympan,
whether in connection with means for automatically reversing the direction of the
movement of the tympan or not, and this feature forms a part of the invention,
which is not limited to the controlling of automatic reversing mechanism.
In the drawings
Figure 43 is an end view of an impression cylinder and a part of the supporting
frame-work of a printing machine provided with a tympan-shifting mechanism, and
provided with a reversing mechanism embodying this modification of the invention,
so much only of the tympan-shifting mechanism as is necessary for an understanding
of the present invention being indicated by dotted lines, and parts not necessary for
the understanding of the present invention being entirely omitted.
Figure 44 is a section on line 44 of Figures 45 and 47.
Figure 45 is a broken side view of the cylinder and reversing mechanism, taken
from the right of Figure 43.
Figure 46 is a detail sectional view taken on line 44 of Figures 45 and 47, but
showing the parts in a different position from that shown in Figure 44.

page_text: Figure 47 is a detail view taken on line 47 of. Figure 46.,
Referring to Figures 43 to 47, the impression cylinder is shown as mounted upon
a shaft 299, having bearings. in the side frames, and consists of two heads Cx and D.
and an intermediate shell or curved bearing plate, which forms an impression
surface E, over which the tympan W is stretched, and over which it moves. Within
this cylinder, and mounted to rotate in the heads thereof, are two tympan-carrying
rollers R and T, about which the tympan is wound, and between which it extends
over the impression surface E, each of said rollers acting at times as a winding-up
or receiving roller, and as a paying-out or delivering roller. In passing between
the roller R and the impression surface E, the tympan passes around and between
a set of measuring or feeding rollers 224¹ and 225¹, and in passing between the
roller T and the impression surface of the cylinder, the tympan also passes around
and between a set of measuring or feeding rollers 226, 227. These parts are all as
shown, and more fully described in Figures 23 to 42, and may be operated and
controlled for shifting the tympan by mechanism such as therein shown and described.
The reversing of the movement of the tympany is caused by the rotation of a reversing
cam shaft 290, as shown in the drawings of this part of the application, whereby
the mechanisms for actuating and controlling the tympan rollers R,..T, and the
feeding rollers 2241, 225¹, 226, 2271, are controlled, to cause the reversing of the
movement of the tympan.
1.
.1
This part of the present invention consists partly of means whereby, in the pre-
ferred application of the invention shown, the reversing shaft 290 is actuated through
a tumbler cam 267, and will now be described.
Pivoted to a bracket 2991, carried by the cylinder shaft 299, are two tripping
lévers 200, 200", each having an arm 201, the ends of which arms extend opposite the
tympan rollers R and T respectively. These levers are under spring tension, to move
their arms 201 toward the tympan rollers, as by coiled springs 202, the ends of the
arms 201 being preferably provided with antifriction rolls 203, to bear against the
rolls of tympan on the tympan rollers. Each of the levers 200, 200%; has also an
arm 204, which arms extend one toward either side of the reversing shaft 290, and
carry rolls 205, 205, positioned to be engaged by a double-acting cam 206 on said
shaft, whereby one or the other of the rolls 205 is engaged to hold one or the other
of the arms 201 away from the tympan roller R or T, the cam 206 being so formed
that, for each reversing movement of the shaft 290, that is, in the construction shown,
for each quarter rotation of the shaft, one of the levers 200, 200º, will be moved
to carry its arm 201 away from, &, to hold it out of contact with, the tympan, and
the other lever released, and allowed to move under the action of its tension spring,
so that is bearing roll 203 will bear against the roll of tympan which is to be
unwound.
Mounted in a hole 210, extending centrally of the cylinder shaft 299, is a
spindle 211, normally held in the position shown in Figures 46 and 47, against the
tension of a spring 212, by means of a catch or detent 213, engaging in a notch 214
in said spindle, and spring-pressed, as by a spring 215, to hold it in engaging position.
Beyond the end of the cylinder shaft, the spindle carries a spool 216, between the
shoulders of which, extends a stud or roll. 217 on; the end of a rocking lever 218
pivoted to a bracket on the journal box of the cylinder shaft, the other end of which
lever engages a pin 219 extending through the supporting frame of the machine, in
position so that its inner end may be moved into position to engage and actuate the
tumbler cam 267 on the shaft 290, as it moves with the cylinder. Also entering
between the shoulders of the spool 216, is a roll 220, carried by one arm of a rocking
lever 221, pivoted in a bracket on the journal box of the cylinder shaft, the other arm
of which lever carries a roll 222, extending over an annular cam 223, by which the
movement of the spindle outward from the end of the shaft is prevented, except
when the cam is in position with its depressed portion beneath the roll 222, as shown
in Figures 43 and 45, when the spindle is free to move outward. to the position shown
in Figure 45, except as it is prevented from so doing by the detent 213. The cam-223
carries a gear 224, meshing with, and driven by, a gear 225 on the end of the cylinder

page_text: shaft 299. Pivotally connected to the outer end of the detent 213 are the ends of
two tappet levers 230, 230, the other ends of which extend into position to be
engaged by arms 231 of the tripping levers 200, 200, to cause the detent to be with-
drawn, to release the spindle when the tympan has been almost all unwound from
the tympan roller, so as to permit a sufficient movement of the lever 200, or 200º, as
the case may be, under the action of its tension spring.
During the shifting of the tympan in either direction, the spindle 211 is normally
held retracted against the tension of the spring 212 by means of the detent 213, as
shown in Figures 45 and 47, thus holding the pin 219 retracted, so as not to engage
the tumbler cam 267 as the cylinder rotates, and one of the levers 200, 200° is held
against the tension of its spring 202, to prevent its arm 231 from engaging the corre-
sponding tappet lever. 230 by means of the cam 206 engaging its arm 204, and the
other of the levers 200, 200, is held. against the tension of its spring, to hold its
arm 231 out of contact with the corresponding.tappet lever 230 by engagement of
its antifriction roll 203 with the roll of tympan on the tympan roller R or T, as the
case may be. Figure 46 shows sach position of the parts during the time that the
tympan is being fed from the roller R to the roller T.
When, however, the tympan has been almost unwound from the delivery roller;
the lever 200 or 200, whose anti-frictio: roller .203 has been pressing against the
tympan on, the delivery roller, will have been moved by its spring, so as to carry its
arm 231 into engagement with the corresponding tappet lever 230, and when only,
say, two or three thicknesses of the tympin remain on the delivery roller, the arin
will have been. moved so far, as to have caused the tappet lever to withdraw
the detent 213, so as to release the spindle 211. Such position of the parts
is shown in Figure 44, in which the movement of the tympan has been from the
roller T to the roller R, as indicated by the arrows.
The spindle having been released by the detent 213, will be free to move outward
under the tension of its spring 212, except as such movement is restrained by the
engagement of the roll 222 on the lever 221 with the cam 223, and as soon as the
depressed portion of the cam 223 comes opposite the roll 222, the spindle will nové
outward, thereby rocking the lever 218, to throw the pin 219 into the path of the
tumbler cain 267, as shown in Figures 43 and 45, whereby, as the rotation of the
cylinder continues, the reversing shaft 290 will be given a one-quarter rotation, to
cause the reversing of the movement of the tympan-feeding mechanism.
By this movement of the shaft 290, also, the cam 206 will be moved to engage the
arm 204 of the lever 200, to hold said lever out of operative position, and the arm 204 of
the lever 200 will be released, to allow the roll 203 of said lever to contact with the
roll of tympan on the tympan roller R, which now becomes the delivery roller, the
parts being then in the position shown in Figures 45 and 46..
After the tumbler cam 267 is moved out of engagement with the pin 219 by the
rotation of the cylinder, the lever 221 is rocked by the: cam 223, to throw the
spindle 211 back to its normal position, and to cause the lever 218 to be rocked, to
retract the pin 219 out of the path of the cam 267, and the detent 213, having been
released by the movement of the lever 200 by the cam 206, will again engage
the spindle, to hold it in its normal retracted position. The spindle will then
remain retracted until the tympan has been almost unwound from the tympan
roller R, when it will be again released through the action of the lever 200°; to
cause another quarter rotation of the shaft 290, as before, and consequent reversing
of the movement of the tympan..
The cam 223 is driven so as to made one revolution for each two revolutions of the
impression cylinder, the impression cylinder being supposed to make two revolutions
for each impression, and the cam is timed so as to permit the outward movement of
the spindle 211 only at a time to cause the pin 219 to engage the tumbler cam on
the, shaft 290, on the desired alternate revolutions of the impression cylinder.
.r
The term "positive, driving," used in. the specification indicates driving by
mechanism connected with a moving part, of the machine, as contrasted with driving
by, means of spring power. So, too, the term "power-operated mechanism" is used

page_text: in the claims to indicate mechanism operated through connection with a moving
part of the machine, as contrasted with mechanism operated by a spring.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed (as communicated to
me from abroad), I declare that what I claim is :-
1. The combination with an impression cylinder and two tympan-carrying rollers
mounted to revolve therein, and between which the tympan is intermediately
stretched over the impression surface of the said cylinder, of a mechanism con-
structing and operating to shift said tympan from roller to roller, over the impression
surface, after each impression, and means acting automatically to reverse the tympan-
shifting action of said mechanism so that the same shall operate to shift said tympan
first in one direction and then in the other, substantially as described.
2. In a printing machine, the combination with an impression cylinder and two
tympan-carrying rollers mounted to revolve therein, and from which the tympan is
intermediately stretched over the impression surface of the cylinder, of a power-
operated driving mechanism for the wind-up or receiving roller, and a friction clutch
interposed between said driving mechanism and the shaft of the tympan-receiving
roller, for shifting the tympan from off the delivering roller on to the receiving
roller, and means for reversing the tympan-shifting action of said mechanism, so
that it shall operate to shift said tympan first in one direction and then in the other,
substantially as described.
3. The combination with an impression cylinder and two tympan-carrying rollers
mounted to revolve therein, and between which the tympan is intermediately
stretched over the impression surface of said cylinder, of a mechanism constructed
and operating to shift said tympan from roller to roller, each shifting movement
carrying a portion of the tympan over the whole extent of the printing surface after
each printing impression, and means acting automatically to reverse the tympan-
shifting action of said mechanism, so that it shall operate to shift said tympan first
in one direction and then in the other, substantially as described.
4. In a printing machine, the combination with an impression cylinder and two
tympan-carrying rollers mounted to revolve therein, and from which the tympan-
bed is intermediately stretched over the impression surface of said cylinder, of a
power-operated driving mechanism for the wind-up or receiving roller, and a friction
roller interposed between said driving mechanism and the shaft of the tympan-
receiving roller, for shifting the tympan from off the delivering roller on to the
receiving roller, and means acting automatically to reverse the tympan-shifting
action of said mechanism, so that it will operate to shift said tympan first in one
direction and then in the other, substantially as described.
5. In a printing machine, the combination with an impression cylinder and two
tympan-carrying rollers mounted to revolve therein, and from which the tympan web
is intermediately stretched over the impression surface of said cylinder, of a power-
operated driving mechanism for the wind-up or receiving roller, for shifting the
tympan from off the delivering roller on to the receiving roller, a friction clutch
interposed between said driving mechanism and the shaft of the tympan-receiving
roller, and a controlling roller acting by surface contact with the rolled tympan, to
control its slipping movement, substantially as described.
6. In a printing machine, the combination with an impression cylinder and two
tympan-carrying rollers mounted to revolve therein, and from which the tympan
web is intermediately stretched over the impression surface of said cylinder, of a
power-operated driving mechanisin for the wind-up or receiving roller, for shifting the
tympan from off the delivering roller on to the receiving roller, a friction clutch interposed
between said driving mechanism and the shaft of the receiving roller, a controlling
roller in contact with the rolled tympan, to control the shifting movement of the
tympan, and means governing the extent of surface movement of said controlling
roller during each shifting operation, substantially as described.
7. The combination with an impression cylinder and two tympan-carrying rollers

page_text: mounted to revolve therein, and between which the tympan web is intermediately
stretched over the impression surface of said cylinder, of a power-operated driving
mechanism for each of said rollers, a friction clutch interposed between each of said
driving mechanisms and the shaft of the roller with which it is associated, and means
for simultaneously connecting one friction clutch mechanismn with its shaft, and
disconnecting the other friction clutch mechanism from its shaft, substantially as
described.
8. In a printing machine, the combination with an impression cylinder, two
tympan carrying rollers mounted to revolve therein, and between which the tympan
web is intermediately stretched over the impression surface of said cylinder, a
constantly operating driving mechanism associated with the shaft of each of said
tvinpan rollers, a friction clutch mechanism intermediate of said driving mechanism
and the shaft of each of said rollers, and means simultaneously connecting one
friction clutch mechanism with the shaft of one of the tympan rollers, and discon-
necting the other friction clutch mechanism from its shaft, of two controlling rollers
rotated to control the shifting of the tympan, means moving them alternately into
co-active relation with the tympan-carrying rollers, to reverse the direction of its
movement, a power-operated driving mechanism for the controlling rollers, & a
coupling connecting said driving mechanism with the shaft operating said con-
trolling rollers, substantially as described.
9. The combination with the impression cylinder and the tympan carrying
roilers, of means for shifting the tympan from one to the other roller, the
controlling, rollers, and means for operating them, and the oscillating frame, and
means for operating it, substantially as described in Figures 1 to 22.
10. The combination with the impression cylinder, tympan-carrying rollers, friction
clutches for their shafts, power-operated mechanism for driving one member of said
clutches, and means for moving the other clutch members into and out of action, of
a controlling roller, a clutch for its driving shaft, power operated mechanism for
positively driving one member of said clutch, & means for moving the other clutch
member into and out of action, substantially as described in connection with
Figures 1 to 22.
11. The combination of an impression cylinder, mechanism carried by the cylinder
for supporting a tympan web, power-operated driving mechanism for causing a
tympan-shifting action of the supporting mechanism, a shifting movement occurring
after each impression, sufficient to carry a portion of the tympan over the whole
extent of the impression surface, and mechanism, driven independently of the tympan
supporting mechanism, for controlling the length of tympan shifted at each movement
thereof, substantially as described.
12. The combination of an impression cylinder, mechanism carried by the cylinder
for supporting a tympan web, power-operated driving mechanism for causing a
tympan-shifting action of the supporting mechanism, a shifting movement occurring
after each impression sufficient to carry a portion of the tympan over the whole extent
of the impression surface, and means for automatically reversing the tympan-shifting
action of said driving mechanism, substantially as described.
13. The combination with an impression cylinder, two tympan-carrying rollers
mounted to revolve therein, and two sets of feeding rolls, between which the tympan
is intermediately stretched over the impression surface of said cylinder, of means for
simultaneously driving said feeding rolls, to shift the tympan by drawing it from one
carrying roller and feeding it to the other, and means for reversing the direction of
motion of the feeding rolls, substantially as described.
14. The combination with an impression cylinder, of two tympan-carrying rollers
mounted to revolve therein, between which the tympan is intermediately stretched
over the impression surface of said cylinder, an interposed set of feeding rolls,
inechanism for driving said feeding rolls, to shift the tympan by drawing it from the
delivery carrying roller and feeding it to the receiving carrying roller, and mechanism
for driving the receiving carrying roller and maintaining a constant driving tension
thereon, substantially as described.

page_text: 15. The combination with an impression cylinder, of two tympan carrying rollers
mounted to revolve therein, between which the tympan is intermediately stretched
over the impression surface of said cylinder, an interposed set of feeding rolls,
mechanism for driving said feeding rolls, to shift the tympan by drawing it from the
delivery carrying roller, and feeding it to the receiving carrying roller, mechanism
for driving the receiving carrying roller, and means for applying friction to the
delivery carrying roller, substantially as described.
16. The combination with an impression cylinder, two tympan-carrying rollers
imounted to revolve therein, and two sets of feeding rolls between which the tympan
is intermediately stretched over the impression cylinder of said surface, of ineans for
simultaneously driving said feeding rolls, to shift the tympan, a positive driving
mechanism for the receiving tympan-carrying roller, and a friction clutch on the
Shaft of the tympan-receiving roller, substantially as described.
17. The combination with an impression cylinder, two tympan-carrying rollers.
mounted to revolve therein, and two sets of feeding rolls, between which the tympan
is intermediately stretched over the impression surface of said cylinder, of means for
simultaneously driving said feeding rolls, to shift the tympan, driving mechanism for
each of the tympan-carrying rollers, a friction clutch between each said driving
mechanism and the shaft of the roller with which it is associated, and means for
Simultaneously connecting one friction clutch with its shaft, and disconnecting the
other friction clutch from its shaft, and for reversing the movement of the feeding
rolls, substantially as described.
18. The combination with an impression cylinder, and two tympan-carrying rollers
mounted to revolve therein, and between which the tympan is intermediately
stretched over the impression surface of said cylinder, of a driving mechanism
for each of said rollers, a friction clutch between the driving mechanism and
the shaft of each of said rollers, two sets of feeding rolls which control the shifting
movement of the tympan, and means for rendering the set of feeding rolls and
carrying roller which act upon opposite ends of the tympan, operative to advance
and wind up the tympan in opposite directions during alternate periods, substantially
as described.
19. The combination with an impression cylinder and feeding rolls which control
The shifting movement of the tympan, a driving shaft for said rolls, a friction clutch
connected with said shafts, the fast member whereof is positively driven, and the
loose member of which is applied by a lever, of the lever-bearing 188 carrying the
pin 117, and means for adjusting the position of said pin, to vary the friction of
the clutch, substantially as described, in connection with Figures 23 to 42.
20. The combination with an impression cylinder, two tyınpan-carrying rollers
mounted to revolve therein, and two sets of feeding rolls between which the tympan
is intermediately stretched over the impression suface of said cylinder, of the circular
rack 180 constructed and mounted so as to be stationary when the tympan-supporting
cylinder moves in its printing direction, and to be movable therewith in its non-
printing direction, whereby the position of the tympan is maintained at all times,
substantially as described in connection with Figures 23 to 42.
21. The combination with an impression cylinder, and tympan-carrying rollers
mounted to revolve therein, of a friction clutch for the actuating shaft thereof, and
means for driving said clutch, a spring-actuated lever operating to couple the clutch,
and means for adjusting the pressure of said spring, substantially as described.
22. The combination with an impression cylinder and two tympan-carrying rollers
mounted to revolve therein, of friction clutches for the actuating shaft thereof, ineans
for driving said clutches, spring-actuated levers for coupling the clutches, and a
cam 188 controlling the movements of said levers, substantially as described in
connection with Figures 23 to 42.
23. The combination with an impression cylinder and feeding rolls between which
the tympan is intermediately stretched over the impression surface of said cylinder,
of a driving shaft therefor, gearing connecting said shaft and the shafts of the feeding
rolls, an intermediate reversing coupling for causing said driving shaft to rotate the

page_text: feeding rolls in either direction, and means for shifting said coupling, whereby the
feeding movement of said rolls is made in opposite directions during alternate periods,
substantially as described.
24. The combination with shaft 164, a driving clutch therefor, and lever 186 for
operating said clutch, of brake shoe 120, its rock arm 129, and driving stud 105,
and means adjustably connecting said stud 105 with the lever 186, substantially as
described in connection with Figures 23 to 42.
25. The combination with shaft 164, lever 186, brake shoe 120, of the arm 123;
carrying the brake shoe, excentric 121 on which arm 123 is hung, rock arm 129 on
the excentric 121, and connections between lever 186 and rock arm 120, substantially
as described, in connection with Figures 23 to 42.
26. The combination with the clutch Z, its operating lever 186; its shaft 164, and
gearing connecting said shaft with the feeding rolls, of a clutching mechanism
interposed between said shaft and gearing, a cam 156, and a reversing mechanism
therefor, substantially as described in connection with Figures 23 to 42.
27. The combination with the shaft 190, and means operated thereby, to change
the driving direction of the gearing transmitting the movement of the shaft 164; of
the cam 188 operating the clutches X, Y, of a compound ratchet mechanism making
a predetermined number of impulses, and applying the last to move a pin into
engagement with a tumbler-cam operating said shaft 190, to reverse the direction of
movement of the tympan-shifting devices, substantially as described in connection
with Figures 23 to 42.
28. The combination with the clutch Z and the shaft 164 which it moves, and the
lever 186 of, said clutch of the cam 183 formed to actuate the lever 186 at a certain
time with relation to the operation of the machine, and means for sliding said cam
into and out of active relation to said lever, substantially as described, in connection
with Figures 23 to 42.
29.. The combination with an impression cylinder and tympan-shifting mechanism,
including two tympan-carrying rollers, between which the tympan is stretched over
the impression surface of the cylinder, and from one of which rollers the tympan is
wound onto the other, of means for determining the extent of the movement of the
tympan, according to the size of the roll of tympan on one of the carrying rollers,
substantially as described.
30. The combination with an impression cylinder and tympan-shifting mechanism,
including two tympan-carrying rollers, between which the tympan is stretched over
the impression surface of the cylinder, and means for reversing the direction of
movement of the tympan, to wind the tympan onto either carrying roller from the
other, of means for determining the extent of movement of the tympan in one
direction, according to the size of the roll of tympan on one of the carrying rollers,
substantially as described.
31. The combination with an impression cylinder and tympan-shifting mechanism;
including two tympan carrying rollers, between which the tympan is stretched over
the impression surface of the cylinder, and means for automatically reversing, the
direction of movement of the tympan; to wind the tympan onto either carrying roller
from the other, of a member, under tension, to move toward one of the tympan
rollers, and bearing against the roll of tympan on said roller, and means controlled
by said member for controlling the operation of the reversing means, substantially as
described.
32. The combination with an impression cylinder and tympan-shifting mechanism,
including two tympan-carrying rollers, between which the tympan is stretched over
the impression surface of the cylinder, and means for automatically reversing the
direction of movement of the tympan, to wind the tympan on to either carrying
roller from the other, of two members under tension, to move one toward each
of the tympan rollers, means for holding said members alternately out of contact
with the tympan on said rollers, as the movement of the tympan is reversed, and
means controlled by said members for controlling the operation of reversing means,
substantially as described.

page_text: 33. The combination with an impression cylinder and tympan-shifting mechanism,
including two tympan-carrying rollers, between which the tympan is stretched over
the impression surface of the cylinder, and means for automatically reversing
the direction of movement of the tympan, to wind the tympan onto either carrying
roller from the other, of a member and connections for controlling the operation of
the reversing means, a detent for said member, and a tripping lever controlled by the
roll of tympan on one of the tympan rollers, to trip the detent, substantially as
described.
34. The combination with an impression cylinder and tympan-shifting mechanism,
including two tympan-carrying rollers, between which the tympan is stretched over
the impression surface of the cylinder, and means for automatically reversing the
direction of movement of the tympan, to wind the tympan onto either carrying roller
from the other, of tripping levers 200 and 200°, having arms 201 and 231, a member
and connections for controlling the operation of the reversing means, a detent for
holding said member in normal position against spring tension, tappet levers 230 for
withdrawing said detent, to release said member, means for holding said levers
200, 200, alternately out of operation, as the movement of the tympan is reversed,
means for holding the other of said levers in contact with the roll of tympan on the
delivering roller, and under tension, to move toward the delivering roller, to engage
the corresponding tappet lever 230, to trip the detent, and means for returning said
member to normal position, substantially as described in connection with Figures 43
to 47.
35. The combination with an impression cylinder and tympan-shifting mechanism,
including two tympan-carrying rollers, between which the tympan is stretched over
the impression surface of the cylinder, and means, including a shaft 290 having a
tumbler cam 267, for automatically reversing the direction of movement of the
tympan, to wind the tympan onto either carrying roller from the other, of a spring-
pressed spindle 211 mounted centrally in the cylinder shaft, and free to move
longitudinally thereof, a detent whereby the spindle is held in its normal retracted
position, a tripping lever under tension, to move toward the delivering tympan roller,
to trip the detent, an actuating pin 219 for the tumbler cam 167, and connections
whereby the pin 219 is moved into operative position by the movement of the
spindle 211, substantially as described in connection with Figures 43 to 47.
36. The combination with two web-carrying rollers, means for causing the web to
be wound from one of said rollers onto the other, and means for automatically
reversing the direction of movement of the web, of a member and connections for
controlling the operation of the reversing means, a detent for said member, and
a tripping lever under tension, to move toward the delivering tympan-carrying roller,
to trip the detent, substantially as described.
37. A tympan-shifting mechanism substantially such as illustrated in Figures 1
to 22.
38. A tympan-shifting mechanism substantially such as illustrated in Figures 23
to 42.
39. A tympan-shifting mechanism substantially such as illustrated in Figures 43
to 47.
Dated this 24th day of January 1899.