IMPROVEMENTS IN CYLINDER PRINTING MACHINES
Year: 1885

page_text: HENRY PATTMAN TRUEMAN and JOHN GEORGE NEW of 78 Parade Birmingham
in the county of Warwick, Engineers and Machinists do hereby declare the nature
of our invention for "IMPROVEMENTS IN CYLINDER PRINTING MACHINES" to be as
follows:-
Our invention consists firstly of improved means for starting and completeing
the revolution of the gear wheels attached to the cylinder of that class of printing
machine known as stop cylinder machines. On the end of the cylinder is fixed a
toothed wheel which has its teeth removed or mutilated for a portion of the
circumference, so as to allow a rack on a table moving underneath to pass to and
fro without engaging with the toothed wheel. On the side of the said mutilated
gear wheel is fixed a projection which engages with the device on the rack which
we will now describe.
1
At one end of the rack is a detent lever, and at the other end is an adjustable
stop piece, both the detent and stop piece are in the same plane as the projection
on the mutilated gear. When the rack on the table is moved to the end of its
stroke, the detent is pushed down by the projection and springs up again behind
it. When the rack reverses its motion the detent engages the projection, and the
first tooth of the mutilated gear is started into the proper space of the rack and
the wheel travels in gear till near the other end of the stroke, when the projection:
then engages with the stop piece aforesaid, and the complete revolution is effected.
The stop piece is adjustable to compensate for wear, and the detent is held back.
from engaging with the projection, when it is desired to stop the cylinder while.
the machine is allowed to continue its motion.
Our invention consists secondly of means for lifting the feed board of printing
machines by a device which is operated from the reciprocating table of the machine
and yet allows of the motion of the feed board being stopped, while the table
continues its motion. This is effected by an inclined plane fixed to the under side
of the table which engages with and depresses a lever. This downward motion is
converted into the required upward motion by a lever of the 1st order, the fulcrum
of the said lever of the 1st order is made to rise and fall, when the said fulcrum is
lowered, the said lever can no longer engage with the inclined plane on the table,.
so that the feed board stops while the table continues running.
.
Our invention consists thirdly of improved rollers or bowls for, working in the
internal cam grooves usually employed in constructing this class of machinery.

page_text: Instead of the usual plain groove and roller loosely fitted therein, we employ two
rollers of half the usual thickness and of dissimilar diameters. The cam groove is
also made in steps to correspond with the said rollers, by this device we avoid all
loose fitting and reduce the friction of these parts.
Our invention consists fourthly of the employment of roller guides to the tables
of printing machines, which said rollers are provided with eccentric pins, for the
purpose of taking up the natural wear.
Our invention consists fifthly of a single shaft so placed with regard to the
before-named contrivances, that all the operations before described are actuated and
controlled by the turning of this said single shaft.
HENRY PATTMAN TRUEMAN.
JOHN GEORGE NEW.
Improvements in Cylinder Printing Machines.
HENRY PATTMAN TRUEMAN and JOHN GEORGE NEW of 78 Parade Birmingham,
in the county of Warwick, Engineers and Machinists, do hereby declare the
nature of our invention for IMPROVEMENTS IN CYLINDER PRINTING MACHINES
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
Our invention consists firstly of improved means for starting and completing the
revolution of the gear wheels attached to the cylinder of that class of printing
machines known as stop cylinder machines. On the end of the cylinder is fixed
a toothed wheel which has its teeth removed or mutilated for a portion of the
circumference so as to allow a rack on a table moving underneath to pass to and
fro without engaging with the toothed wheel. On the side of the said mutilated
gear wheel is fixed a projection which engages with the device on the rack which
we will now describe. At one end of the rack is a detent lever, and at the other
end is an adjustable stop piece, both the detent and stop piece are in the same
plane as the projection on the mutilated gear. When the rack on the table is
moved to the end of its stroke, the detent is pushed down by the projection and
springs up again behind it. When the rack reverses its motion the detent engages
the projection, and the first tooth of the mutilated gear is started into the proper
space of the rack, and the wheel travels in gear till near the other end of the
stroke, when the projection then engages with the stop piece aforesaid and the
complete revolution is effected. The stop piece is adjustable to compensate for
wear, and the detent is held back from engaging with the projection, when it is
desired to stop the cylinder while the machine is allowed to continue its motion,
..

page_text: Our invention consists secondly of means for lifting the feed board of printing
machines by a device which is operated from the reciprocating table of the machine
and yet allows of the motion of the feed board being stopped, while the table
continues its motion. This is effected by an inclined plane fixed to the under side
of the table which engages with and depresses a lever, this downward motion is
converted into the required upward motion by a lever of the 1st order. The
fulcrum of this lever of the 1st order is made to rise and fall, when the said fulcrum
is lowered, the said lever can no longer engage with the inclined plane on the table,
so that the feed board stops while the table continues running.
Our invention consists thirdly of improved rollers or bowls for working in the
internal cam grooves usually employed in constructing this class of machinery.
Instead of the usual plain groove and roller loosely fitted therein, we employ two
rollers of half the usual thickness and of dissimilar diameters. The cam groove is
also made in steps to correspond with the said rollers, by this device we avoid all
loose fitting and reduce the friction of those parts.
Our invention consists fourthly of the employment of roller guides to the tables
of printing machines, which said rollers are provided with eccentric pins, for the
purpose of taking up the natural wear.
Our invention consists fifthly of a single shaft so placed with regard to the
before-named contrivances that all the operations before described are actuated and
controlled by the turning of this said single shaft.
In order that our invention may be fully understood and carried into operation
we will describe the accompanying sheet of drawings made to a scale of about
1 inch to the foot, and marked with letters of reference.
Fig. 1 is a perspective view of so much of a printing machine as is required to
shew our improvements. Figs. 2 and 3 are views partly in section of our improved
rollers for cam grooves of printing machines.
Fig. 4 is an end elevation of our improved roller table guides for printing
machines.
In figure 1 A is the mutilated gear wheel. B the projecting piece on starting
tooth. C the detent lever. D the stop piece. E the lifter resting on the cam I
on shaft J. The parts being in the position indicated on the drawing, motion is
communicated to the rack which moves toward the cylinder wheel A. The detent C
engages the projection B and starts the teeth of wheel A in the rack. At the
completion of this in stroke of the machine the stop piece D engages with B and
causes a complete revolution of the cylinder wheel A. On the return stroke the
rack passes under the flat or mutilated portion of A and C is depressed by B and
springs up behind it into the position shewn in Fig. 1 in the drawings. When it
is desired to prevent the detent catch engaging with B the lifter E is moved
upward by the cam I on shaft J. being operated by means of the handle K.
The mechanism for lifting the feed board is shewn at F. G. H. F is an inclined
plane fixed to the reciprocating table (not shown in the drawing). G a lever of
the first order whose fulcrum is at the top end of the rising and falling piece, H,
which also rests on a cam working on the shaft J in the same manner as the
lifting piece E on the opposite side of the machine. The inclined plane presses
downwardly on one end of the lever G. the other end being consequently elevated.
This elevated end is provided with a connecting rod L which said rod lifts the feed
board of the machine (not shewn in the drawings).
F
When it is desired that the inclined plane F should not raise the connecting
rod L the fulcrum H is lowered by moving the shaft J by its handle K. the lever G
then falls out of the range of the inclined plane F and no motion can be derived
from it. It will now be seen that the movement of the single shaft J stops the
detent C engaging with the cylinder and at the same time stops the motion of the
feed board mechanism, G. H. L.
The improved bowls or cam rollers are shewn in Figs. 2 & 3. in Fig. 2. A. B. indicate
the side of the grooves. The rollers C. D being made of dissimilar diameters touch
opposite sides of the groove and are free to receive independent motion therefrom
"

page_text: ་
as they pass along it. In fig. 3 both rollers are of the same diameter but one of
the surfaces engaging with the rollers is placed in higher or lower plane, and so
allows free movement to the rollers without sliding friction or side shake.
Fig. 4. A is the bed piece and B the table of a printing machine. The rollers C. D.
are mounted on eccentric pins fixed in the bosses E on the underside of the table B.
The rollers C bear against the sides of the bed piece A at F. F. Compensation for
wear is made by turning the eccentric pins working in the bosses E. E.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
First. In cylinder printing machines the starting tooth B. detent catch O. and
stop piece D. substantially as described.
Second. The feed board lifting mechanism consisting of a lever arranged to
convert a downward movement into an upward movement, in combination with a
rising and falling fulcrum, substantially as described.
Third. The rollers for cam grooves which are adapted to move freely on their
own axes, while completely filling the groove in which they travel, substantially as
described.
Fourth. The application of roller guides to the tables of printing machines, such
rollers being provided with eccentric axes, substantially as described.
Fifth. The arrangement of a single shaft by means of which all the required
motions of the printing machine are controlled, substantially as described.
Dated this 16th mình tinh 1001