New and Improved Mechanical Movement for Converting Rotary Motion into Rectilinearly Reciprocating Motion.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
New and Improved Mechanical Movement for Converting Rotary
Motion into Rectilinearly Reciprocating Motion.
I, GEORGE CROYDON MARKS, of 18, Southampton Buildings, Chancery Lane,
London, W.C., Consulting Engineer, (a communication from abroad by the
Campbell Printing Press and Manufacturing Company, of 1, Madison Avenue,
New York City, State of New York, United States of America, Manufacturers),
do hereby declare the nature of this invention to be as follows:-
This invention relates to a new and improved mechanical movement for con-
verting rotary motion into rectinilearly reciprocating motion, and while the
same may be adapted to any use where it is desired to apply such a movement,
the invention has been principally devised for use in connection with recipro-
cating beds of printing presses.
The invention consists of a driving gear which is continuously rotated.
The part or bed which is to be moved has a double rack attached thereto.
Means are provided so that the driving gear will engage one part, and then the
other part of the double rack at one and then the other side of its axis of rota-
tion, so that a to and fro working stroke will be imparted to the bed.
The driving gear carries a wrist-pin thereon, which engages a member entirely
separate of the reciprocating bed.
This member is arranged to have a to and fro movement in line with the bed.
The wrist pin engages a slot in this member, so that the member will be moved
back and forth at all times by a crank motion.
When the main working stroke of the bed is finished in one direction, lugs
carried by the same will come against one moving member, and at the same
time a locking pin carried by the bed will be inserted into the moving member.
By this construction the movement of the bed will be reversed.
Two locking pins are provided, one at each end of the bed. These locking pins
are carried by hangers depending from the bed, and are operated by stationary
double faced cams which positively push each one in, and positively pull it out
of engagement with the moving member to connect the parts at each end of
the stroke of the bed in either direction.
'
The locking pins are preferably spring pressed to keep them normally in
operative position.
Each locking pin is arranged to be operated by an arm projecting from a shaft
carried by one of the said hangers, and each shaft preferably carries two arms
or rollers to engage said double faced cams.
The construction for the locking pin at each end of the bed is substantially
the same, except, that it is right and left.
The especial feature of novelty in this locking pin engagement, wherein each
locking pin
positively moved in and out by said double faced cams to connect

page_text: and disconnect the moving member to the bed, so that the same will reverse the
bed at each end of its movement.
Dated this 28th day of October 1899.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.
New and Improved Mechanical Movement for Converting Rotary
Motion into Rectilinearly Reciprocating Motion.
I, GEORGE CROYDON MARKS, of 18, Southampton Buildings, Chancery Lane,
London, W.C., Chartered Patent Agent and Consulting Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement: -
This invention relates to a new and improved mechanical movement for con-
verting rotary motion into rectilinarly reciprocating motion, and while the
same may be adapted to any use where it is desired to apply such a movement,
the invention has been principally devised for use in connection with recipro-
cating beds of printing presses.
The invention consists of a driving gear which is continuously rotated.
The part or bed which is to be moved has a double rack attached thereto.
Means are provided so that the driving gear will engage one part, and then the
other part of the double rack at one and then the other side of its axis of rota-
tion, so that a to and fro working stroke will be imparted to the bed.
This means consists of two bushings, in which the shaft of the main driving
gear is excentrically journalled, and connecting actuating mechanism arranged
so that said two bushings will operate together to raise and lower the main
driving gear.
By this arrangement if the parts should become stuck or clogged in operation,
the same can be readily taken apart for the purpose of refitting or lubrication.
The driving gear carries a wrist-pin thereon, which engages a member entirely
separate of the reciprocating bed.
This member is arranged to have a to and fro movement in line with the bed.
The wrist-pin engages a slot in this member, so that the member will be moved
back and forth at all times by a crank motion.
When the main working stroke of the bed is finished in one direction, lugs
carried by the same will come against the moving member, and at the same
time a locking-pin carried by the bed will be inserted into the moving member.
By this construction the movement of the bed will be reversed.
Two locking-pins are provided, one at each end of the bed. These locking-pins
are carried by hangers depending from the bed, and are operated by stationary
double-faced cams which positively push each pin in, and positively pull it out
of, engagement with the moving member to connect and disconnect the bed and
member to reverse the movement of the bed in either direction.
The locking-pins are preferably spring-pressed to keep them normally. in
inoperative position.
Each locking-pin is arranged to be operated by an arm projecting from a shaft
carried by one of said hangers, and each shaft preferably carries
or rollers to engage said double-faced cams.
two arms
The construction for the locking-pin at each end of the bed is substantially
the same, except, that they are relatively rights and lefts.

page_text: By these arrangements a strong and efficient movement for the purpose 1s
provided.
The accompanying five sheets of drawings illustrate the details of the inven-
tion.
Referring to said drawings,
Fig. 1 is a side view partly in section, illustrating the arrangements of the
parts;
:
Fig. 2 is a plan view taken on the line 2-2 of Fig. 1;
Fig. 3 is a detail view of a supporting roll for the lower part of the bed;
Fig. 4 is a detail sectional view illustrating the mounting of the reciprocating
slider;
Fig. 5 is an enlarged plan view, and
Fig. 6 an enlarged elevation partly in section taken on the line 6-6 of Fig. 5
showing the details of one of the locking-pin actuating mechanisms carried by
the bed:
Figs. 7 and 8 are perspective views illustrating the cams used to actuate the
locking-pins;
Fig. 9 is a side elevation, and
Fig. 10 an end elevation, showing the mounting of the main driving gear, and
Figs. 11 to 16 inclusive are diagramatic views illustrating the operation of
the parts.
Referring to the drawings and in detail, A designates the reciprocating bed
or member, which is mounted so as to be capable of a right line movement upon
a suitable frame in any of the manners common in printing press machinery
not necessary to herein describe at length.
Extending down from each end of the bed are brackets AL-A', which are
connected together at their lower ends by a piece or frame A².
B designates the upper rack, and C the lower rack, which are secured to the
bed in the same vertical plane.
D designates the framing of the machine in which the driving gear and pinion
are arranged.
E designates the driving gear, which is disposed between the two racks B
and C, the diameter of said driving gear being slightly less than the distance
between said two racks, so that when said gear engages one rack it will just clear
the other.
J designates the pinion which is mounted on a suitable shaft to which power
is imparted. This pinion J meshes with and turns the main driving gear E.
The main driving gear is secured on the end of a shaft 10 which is journalled
excentrically in two bushings 11 and 110, which are fitted in bearings in the
framing D.
The bushing 11 has a collar 111 thereon, which collar has gear teeth cut in
a portion of its surface.
The bushing 110 has a similar collar 114.
Collars 112 and 113 are secured on the shaft 10 to keep the bushings 11 and 110
in place in their bearings.
A shaft 115 is journalled in the framing D below the shaft 10.
On this shaft 115 is fitted a quill 116 which has extending arms 117-118 on
which are cut or formed gear teeth to engage the gear teeth cut on the collars 111
and 114 of the bushings.
The quill 116 has an extending arm 119 which carries a stud 120, provided
with a roller 121, which engages the groove of a cam 122 secured on shaft 123.
This shaft is driven by any suitable gearing, and in the device shown, is arranged
to make one turn for every complete cycle or forward and backward reciproca-
tion of the bed.
By this arrangement, the main driving gear E will be properly raised and
lowered to alternately mesh with the racks B and C.
By this arrangement the shaft 10 will be strongly and rigidly journalled,

page_text: and also the bushings can be readily got at and adjusted or fitted by loosening
the collars 112 and 113 and sliding the same along the shaft 10.
Referring now to the details of the reversing mechanism, 12 designates a wrist-
pin which is fitted on the gear E on the pitch line thereof.
Fitted on said wrist-pin is a block 13 which engages a groove 15 cut in a
slider S..
This slider S is provided with suitable grooves 14 which have bearing faces,
which are fitted on bearings or supports projecting from the framing 1), as shown
in Fig. 4 whereby said slider will have a crank actuated reciprocating motion
at all times.
Holes 16-16 are bored in said slider at each side of the groove 15, as shown
in Figs. 1 and 2.
Surrounding said holes are steel faces 17.
Suitable stops 18-18 are formed on the brackets A¹ of the bed to come against
the slider.
Projecting from each of said brackets A¹ are bearings 19-19, in each set
of which is journalled a shaft 20.
On each shaft 20 a rocker L is arranged.
The rockers at the ends of the bed are rights and lefts, and the one at the left
hand end of the bed will be particularly described. The same is illustrated in
Figs. 5 and 6.
The same has projecting from one side thereof two arms 21 and 22, and pro-
jecting from the other side an arm 23.
A bearing 24 is formed on each bracket A', and fitted to slide in each of said
bearings is a locking-pin or bolt 25.
The end of each of said locking-pins is tapered. These locking-pins are
adapted to engage the holes 16-16 formed in the slider. The taper on the ends
of the bolts insures a very quick and easy locking action, the taper being of
such angle as to prevent any sticking.
To prevent the bolts from entering too far into the holes, the tapered portion
at the ends thereof is cut slightly down below the full diameter of the bolts, so
as to leave a slight shoulder 250 which limits the movement of the locking-
bolts into the holes 16.
"
The faces 17 are made removable and out of steel, so that they can be readily
replaced in case of wear.
The two arms 21 and 22 are forked at their outer ends, as shown, and engage
a pin 26 which passes through the locking-pin 25, and which projects through
slots 27 formed in the bearing 24.
In the arm 23 a stud 28 is secured, which carries a roller 29.
A stud 30 is secured in the arm 21, and the same carries a roll 31.
A bolt or stud 33 is fitted into the bracket A', and the same is provided with
a suitable nut or collar 34.
A spring 35 is arranged thereon between the bracket A¹ and a web extending
between the arms 21 and 22, whereby the movement of said rocker will be limited,
and whereby the same will be normally moved to keep the bolt. 25 in retracted
position.
Stationary cams F and G are secured to the framing D, the cam F being in
the horizontal plane of the roller 31, and the cam G in the horizontal plane of
the roller 29.
The rocker at the right hand end of the bed is substantially the same as the
rocker previously described at the left hand end, except that it is oppositely
arranged thereto, so that the two rockers are relatively rights and lefts.
The arm 23 of the right hand rocker has the roller 29 on the lower side thereof,
and the roller 31 is disposed on the arm 22 instead of the arm 21.
Another stationary cam H is arranged in the same horizontal plane with the
roller 29 of the right hand rocker, and another cam I in the same horizontal
plane with the roller 31 of said right hand rocker.

page_text: By this arrangement as hereinafter described, the bolts 25-25 will be pro-
perly actuated to engage the slider.
A shaft 37 is arranged below the bed, and is provided with a roller 38 which
engages a groove in the lower part of the bed, as shown in Fig. 3, to steady
the bed in operation.
The operation can be readily followed from the fifth sheet of the drawings.
In the particular device shown and described, the pinion is arranged to con-
stitute what is termed a three-revolution pinion. That is, it will make three
revolutions for each complete reciprocation of the bed.
In Fig. 11 the bed is just commencing its main stroke to the left, the gear E
engaging the rack B.
In Fig. 12 the main stroke to the left is just completed, the main driving
gear having made a complete revolution from the position shown in Fig. 11,
and just leaving the rack B.
In this position the slider comes against the stops 18 on the right hand end
of the bed, and the roller 31 on the right hand rocker has just run up the cam I
to push the right hand bolt 25 out into the right hand hole 16 on the slider,
whereby the slider and the bed are locked together.
The main driving gear will then gradually retard and bring the bed to a
state of rest at the left hand extreme, this action taking a quarter revolution
of the gear, and bringing the parts to the position shown in Fig. 13.
Then during the next quarter revolution, the slider will gradually start the
bed from zero up to full speed, and bring the parts to the position shown in
Fig. 14.
During this last half revolution of the gear E, the excentric bushings will
have acted to lower said gear E, so that the same will now engage the lower
rack C.
Just as the parts assume this position, the roller 29 on the right hand rocker
will run up the cam H, and this motion will cause the right hand bolt 25 to
withdraw and release the bed from the slider.
During the next turn of the gear E the bed will receive its main movement
to the right at full speed, which will bring the parts to the position shown in
Fig. 15.
As the parts assume this position, the stops 18 on the left hand side of the
bed will come against the slider S, and the roller 31 on the left hand rocker
will have run up the cam F, thereby inserting the left hand locking-bolt 25
into the left hand hole 16 in the slider.
During the next quarter revolution of the main driving gear, the slider will
act to reverse the bed, or bring the same to a state of rest, as shown in Fig. 16.
During the next quarter revolution of the driving gear E, the bed will be
started up from zero to full speed, and the parts brought to the position shown
in Fig. 11.
During the left half turn of the driving gear E, the same will have been
raised by the excentric bushings to engage the upper rack B.
Just as the parts assume this position, the roller 29 on the left hand rocker
will have engaged the cam G, and the left hand locking-bolt will have been
withdrawn from the slider, thus disconnecting the slider from the bed.
The previously described movements will give the complete forward and back-
ward reciprocation to the bed, and the same will make three revolutions of the
driving gear.
This relative proportion and arrangement, of course, can be varied and pro-
portioned, as desired.
It will be seen that the locking mechanism described forms a very strong and
efficient quick acting device for instantly and positively connecting and dis-
connecting the slider and bed at the proper times.
It will further be seen that the particular means employed. for controlling
the main driving gear so that the same will mesh alternately with the two racks,

page_text: is of simple and strong construction, and so arranged that it can be quickly
adjusted and lubricated.
The details and arrangements herein shown and described may be varied
without departing from the scope of the invention as expressed in the claims.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what
I claim is:-
1. The combination in a mechanical movement, of the bed, the main driving
mechanism therefor, and a reversing mechanism comprising a slider and lock-
ing-pins or bolts for connecting the bed and slider during the reversing move-
ments, substantially as described.
2. The combination in a mechanical movement of the bed, the main driving
mechanism therefor, and a reversing mechanism comprising a slider, locking-
bolts or pins, and cams for actuating the bolts to connect the bed and slider
during the reversing movements, substantially as described.
3. The combination in a mechanical movement of the bed, the main driving
mechanism therefor, and a reversing mechanism comprising a reciprocating
slider, sliding-bolts fitted in bearings carried by the bed, rockers controlling
said bolts, and cams for actuating said rockers to cause the bolts to connect the
bed and slider during the reversing movements, substantially as described.
4. The combination in a mechanical movement, of the bed, the main driving
mechanism therefor, and a reversing mechanism comprising a reciprocating
slider, locking-bolts carried by the bed, rockers for actuating the bolts, and
stationary cams F, G, H, and I for actuating the rockers, substantially as
described.
5. The combination in a mechanical movement, of the bed, the main driving
mechanism therefor, and a reversing mechanism comprising a reciprocating
slider, locking-bolts for connecting the bed and slider during the reversing
movements, means for actuating the bolts, and springs for normally holding
said bolts in retracted positions, substantially as described.
6. The combination in a mechanical movement, of the bed, the main driving
mechanism therefor, and a reversing mechanism comprising a reciprocating
slider having holes, wearing plates protecting said holes, locking-bolts carried
by the bed, and means for actuating said bolts to connect the bed and slider
during the reversing movements, substantially as described.
7. The combination in a mechanical movement of the bed, the main driving
mechanism therefor, and a reversing mechanism comprising a reciprocating
slider, right and left rockers carried by the bed, bolts actuated by said rockers,
and means for moving said rockers so that said bolts will lock the slider and
bed during the reversing movements, substantially as described.
8. The combination in a mechanical movement, of the bed, the main driving
mechanism therefor, and a reversing mechanism comprising a reciprocating slider,
and locking-bolts or pins having tapered ends for connecting the bed and slider
during the reversing movements, substantially as described.
9. The combination in a mechanical movement, of the bed, the main driving
mechanism therefor, and a reversing mechanism comprising a reciprocating
slider, and locking-bolts having tapered ends, and shoulders between the tapered
ends and the body of the bolts, for locking the bed and slider together during
the reversing movements, substantially as described.
10. The combination in a mechanical movement, of the bed, the main driv-
ing mechanism therefor, a reciprocating slider provided with slots 14-14 fitted
on bearings, and means for connecting the slider and bed during the reversing
movements, substantially as described.
11. In the main driving mechanism of a mechanical movement, as herein-
before specified, the main driving gear, the shaft on which the same is mounted,
two bushings in which said shaft is excentrically journalled, and connected

page_text: actuating mechanism for oscillating said bushings to raise and lower said gear,
substantially as described
as herein-
12. In the main driving mechanism of a mechanical movement
before specified, the main driving gear, the shaft on which the same is mounted,
two bushings in which said shaft is excentrically journalled, gear-teeth formed
on each of said bushings, a quill having segments engaging said gear-teeth, and
means for oscillating said quill, substantially as described.
13. In the main driving mechanism of a mechanical movement as herein-
before specified, the main driving gear, the shaft therefor, two oppositely faced
bushings in which said shaft is excentrically journalled, callers for holding said
bushings in their bearings, and means for oscillating said bushings, substantially
as described.
14. In the main driving mechanism of a mechanical movement as herein-
before specified, the main driving gear, the shaft on which the same is mounted,
two oppositely disposed bushings in which said shaft is excentrically journalled,
collars on the ends of said bushings, a quill having two segments engaging
teeth formed on said collars, a cam, and connections therefrom to oscillate said
quill, substantially as described.
15. A new and improved mechanical movement for converting rotary motion
into rectilinary reciprocating motion constructed and operating substantially as
and for the purposes described.