Improvements in Pantograph Engraving Machines.
Year: 1899

page_text: Date of Application, 7th Nov., 1899-Accepted, 3rd Mar., 1900
COMPLETE SPECIFICATION.
Improvements in Pantograph Engraving Machines.
We, JOHN HOPE and Joux Hore, Junior, both of Mashapaug Street in the City
of Providence, County of Providence and State of Rhode Island, United States of
America, Machinists, 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; —
This invention has reference to an improvement in pantograph engraving
machines; and it consists in the peculiar and novel construction and the com-
bination of parts more fully set forth hereinafter.
In pantograph engraving machines the pattern of the design to be engraved
on the rolls is larger and usually many times larger than the design. This pat-
tern is placed on the table of the pantograph engraving machine and is traced by
the stylus, supported usually on a carriage, the longitudinal notion of which is
transmitted, on a diminished scale, to the carriages supporting the gravers. The
traverse motion of the stylus carriage is transmitted to the roller and rotates the
same at a given diminished scale, so as to reproduce the design of the pattern on
a smaller scale on the roller.
The designs engraved on calico-printers' rolls consist of parts of leaves, stems
and Howers placed obliquely to the center of the design on opposite sides.
To facilitate the engraving and to reduce the cost of the pattern, one side of
the design, or in some cases one of the figures of the design, only is cut into
the pattern to be traced by the stylus. The carriages supporting the gravers are
connected so that one or more carriages more longitudinally with the movement
of the stylus and another carriage or carriages move in the opposite direction,
thereby engraving. on the roller operated upon, both sides of the design at the
same time or two sets of figures extending in opposite directions on a predeter-
mined reduced scale.
The required diminution of the pattern engraved on the roller from the pattern
traced by the stylus determines the adjustment of the transmitting mechanism,
so that a pattern may be transferred to the rollers. if desired, in the same design
on a larger scale and also on a smaller scale, but always of less size than the pat-
tern traced by the stylus.
Some of the objects of this invention are to facilitate the accurate adjustment
of the carriages to the required scale of diminution of the design to be engraved
and the accurate reversal of the movement of the carriages without disturbing
the adjustment, so that a multiple of designs may be simultaneously engraved
on one roll in opposite directions while the operative guides the stylus over one
pattern.
A further object of the invention is the construction of the supporting cou-
nections, whereby the movement of the stylus, in tracing the pattern, is trans-
mitted to the gravers and to the roll by means of the bars, engaging with the
levers or carriages, with the least possible resistance and yet so positive that the
slightest movement of the stylus will be transmitted.

page_text: Referring to the accompanying drawings,
Figure is a transverse sectional view of part of a pantograph engraving
machine illustrating our invention.
Figure 2 is a top view of the bracket connected with the lower carriage, show-
ing the slotted portion through which the actuating spindle, operated by the
movement of the stylus carriage, extends.
Figure is a top view of the end of the bracket in which the actuating spindle
is journaled, showing the opening through which the upper lock-hut of the ball-
bearing is adjusted.
Figure is a vertical sectional view of the actuating spindle, showing the
reversible arms operating the carriages and the antifriction ball-bearings for the
actuating spindle.
Figure 5 is a top view of one of the carriage-operating arms and the supporting
plate provided with stops.
Figure 6 is a side view, partly in section, of the same. (Figures 4. 5 and 6
are shown on an enlarged scale.)
Figure is a front view of the supporting connection.
Figure 8 is a side view of the same.
Figure 9 is a plan view of the supporting block, the beveled disks being shown
m broken lines.
Figure 10 is a sectional view of the supporting block, showing the ball-bearings
of the spindle supporting the block, and
Figure 11 is a sectional view of the block, showing the bearings of the spindle
of one of the beveled disks.
Similar marks of reference indicate corresponding parts in all the figures.
In the drawings A indicates the main frame of the machine; the bracket
extending rearward from the main frame and forming the journal support for
the actuating spindle; A3 the stylus carriage; a a bar extending longitudinally
on the stylus carriage. From this bar a the inward and outward movement of
the stylus carriage is transmitted to the roller being engraved: a bar extend-
ing transversely to the stylus carriage. On this bar a rests and moves, longi-
tudinally, the lever-operating device 12 called the mushroom connection, con-
sisting of a frame revolving freely on a post and provided with two conical disks
secured to revolvable spindles. The beveled edges of the disks are in contact
with the bar and move freely, longitudinally, on the bar, transmitting however
every movement of the stylus carriage at right angle to the bar a¹.
The spindle of the mushroom connection 12 is secured in the end of the lever b
pivotally secured to a fork attached to the actuating spindle B journaled in the
brackets A. Near the end of the actuating spindle B (more clearly shewn in
Figure 4) the plate b' is keyed, or otherwise rigidly secured, so as to turn there-
with.
On one side of the plate are the stops which are accurately planed,
milled or otherwise finished to form the stops for the arm, which is secured
by a set screw to the projecting end of the actuating spindle B so that it can be
reversed and secured in two opposite positions bearing on one or the other of the
stops This arm is provided with a boss, arranged perpendicularly over
the axial center of the actuating spindle B. and this boss carries the post 6, near
the upper end of which is rigidly secured another plate provided with the
stops, and to the projecting end of the post 64 is secured another arm &
80 that it can be turned and secured exactly in the same direction as the lower
arm or in the direction exactly opposite to the direction of the lower arm.
When it is required to engrave the design along portions of the printing roll
and reverse the design on other portions of the roll, it can be quickly and accu-
rately done without changing the adjustments by releasing the lower arm 63 and
turning it, with the post 6 and the upper arm &, through half a circle until the
lower arm bears against the opposito stop 6, and then securing the arm again
to the actuating spindle. By thus reversing the positions of the arms 3-1³,

page_text: the movemont of the carriages supporting the gravers is reversed and the tracing
of the design on the pattern will operate the gravers to engrave the design in
the reverse direction.
The arms are accurately planed and of uniform width. The pivotal holes
extending over the end of the actuating spindle B and the end of the post bare
in the exact center of the arms, and the grooves extend along the centers
of the arms b³. The grooves are undercut and form the ways on which the
Blides are supported and secured by the bolts. The arms are
provided with a graduated scale and the slides with a zero mark, so that the
slides may be accurately adjusted on the arius and require no readjustment when
the arms are reversed. The slides support the spindles of the mushroom con-
nections 13 on the upper one of which rests the arm pivotally secured to the
carriage 6, and on the lower mushroom connection 14 rests the arm 610 pivotally
secured to the carriage 6 Tho arm bo is provided with the slot 13 through
which the post 6+, forming the extension of the actuating spindle B, passes. The
carriages baud 618 support the diamond gravers.
The bar a on the stylus carriage A transmits the inward and outward move-
ment of the stylus carriage through a mushroom connection 15 to a lever, similar
to the lever b, connected with a spindle supported in the bearing at. An arm
similar to the arm is secured to the upper end of the spindle. The art is pro-
vided with a slide 6 supporting a mushroom connection 16 which connects with
a bar on the carriage a connected, in the usual manner, with the roll to be en-
graved to impart the rotary movement to the roll at the predetermined
diminished scale.
The actuating spindle B is provided with two V-shaped grooves forming the
ruces for a series of balls c-c. The race rings - and the uut-lock rings 2
are in screw-thread engagement with the sleeve ³ and are provided with a series
of radial holes bored into their peripheral surfaces. The sleeve is provided
with openings through which a pin may be inserted to enter the peripheral
holes in the rings to adjust the races to the balls.
By this construction the actuating spindle B is held against longitudinal move-
ment and turns freely on the ball-bearings.
In Figures 7, 8, 9, 10 and 11 is shown the construction of the supporting or
mushroom connections on un enlarged scale; indicates the slide on which the
block is pivotally supported; 17 the spindle, secured to the slide 6º, preferably
by a clamp-screw, as is shown in Figures 7 and 8, forming the pivotal support
of the block; 18 the supporting block: 19 the bearings for the spindle 17, and
20 the bearings for the spindles 21 of the beveled disks 22-22. The spindles 17
and 21 are provided with the annular grooves 23-23 and 24-24 for the bulls.
The bearings 19 and 20 are made up of the races 25-25, adjustably held in the
required position above and below each of the ball-bearings 26 by the lock-
mute 27-27 in screw-thread engagement with the internally-screw-threaded
holes 28 in the block 18. Portions of the block 18 are cut away at 20-29 to give
access to the several lock-nuts 27 to permit of their adjustment by means of a pin
which enters holes in the peripheral surface of the lock-nuts 27. The arm & may
be the arm connected with the stylus carriage or any other arm of the panto-
graph engraving machine by which or through which motion is transmifted.
The arm bears on the adjacent, inclined edges of the bevoled disks 22-22 and
may be moved longitudinally, thereby causing the beveled disks to rotate, or the
arm may be moved laterally to move the slide 66 laterally, or, when the arm 69
and the slide are pivotally supported, the slide 68 may impart a swinging move-
ment to the arm or rice versa.
By this construction the arm is firmly supported on the adjacent, beveled.
edges of the disks 22-22 and may be moved longitudinally, practically without
any frictional resistance, while the disks freely adjust themselves to the arm
automatically by the swinging of the block 18.

page_text: 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 :
Claim 1. In a pantograph engraving machine, in combination with the stylus
carriage, means for rotating the roll being engraved, the carriages supporting
the gravers and a lever connected with the stylus carriage and with the actuating
spindle, of an arm adjustably secured to the actuating spindle and adapted to
swing around the axial center of the actuating spindle, and connections between
the arm and the lever connected with the stylus carriage; whereby the arm may
be swung from the rear of the actuating spindle to the front, or vice versa, to
reverse the movement of the carriage carrying the gravers, as described.
2. In a pantograph engraving machine, the combination with an actuating
spindle rotatably supported and connections between the actuating spindle and
the stylus carriage, of an arm pivotally supported on the actuating spindle, a
slide adjustably secured on the arm, a carriage for supporting the gravers, and
connections between the carriage and the adjustable slide; whereby the move-
ments of the carriage may be reversed without adjusting the slide, as described.
3. In a pantograph engraving machine, the combination with an actuating
spindle rotatably supported and connected with the stylus carriage, of arms sup-
ported and actuated by the actuating spindle, slides on the arms, means for
Securing the slides in the adjusted position, means for securing the arms to the
actuating spindle, carriages supporting the gravers, and connections between the
carriages and the slides carried by the arms; whereby the design traced by
the gravers may be reversed without changing the adjustment of the parts, as
described.
4. In a pantograph engraving machine, the combination with the actuating
spindle, of an actuating arm journaled on the actuating spindle, and means for
securing the arm to the actuating spindle; whereby the movements transmitted
through the arm may be reversed, as described.
5. In a pantograph engraving machine, the combination with the actuating
spindle, of a plate secured to the actuating spindle, stops on the plate, an arm
journaled at one end so as to swing around the axial center of the actuating
spindle, and means for clamping the arm; whereby the operating mechanismi
may be reversed, as described.
In a pantograph engraving machine, the combination with the actuating
spindle B and connections between the actuating spindle and the stylus carriage,
of a plate secured to the actuating spindle, stops on the plate, an arm pivotally
connected with the actuating spindle, a post connected and turning with the
actuating spindle, a plate secured to the post, stops on the plate, an arm pivotally
secured on the post above the plate and adjustable slides on the arms, whereby
the two arms may be swung around the axial center of the actuating spindle to
reverse the arms, as described.
7. In a pantograph engraving machine, the combination of the following
instrumentalities: a stylus carriage, a rotatable actuating spindle supported on
ball-bearings, plates provided with stops turning with the actuating spindle,
arms pivotally connected, turning with and having capacity to swing around the
vertical axis of the actuating spindle, adjustable slides on the arms, carriages
supporting the gravers, and connections between the slides on the arms and the
carriages and between the actuating spindle and the stylus carriage; whereby
the motions transmitted from the stylus frame to the graver supporting carriages
may be reversed, as described.
8. In a pantograph engraving machine, the combination with the post + sup-
ported on and moving with the actuating spindle and the arm, of the cur-
riage 6, and the arm to pivoted on the carriage and provided with the
slot 63, as and for the purpose described.
0. In a bar-support for pantograph engraving machines, in combination, a
blook supported on a spindle, two disks having beveled edges and pivotal supports

page_text: for the two beveled disks in the block; whereby an arm or bar may be supported
on the beveled edges of the disks, as described.
10. In a bar-support for pantograph engraving machines, the combination with
a member of the machine and a spindle carried by the member, of a spindle, a
block pivotally supported by the spindle, two disks having beveled edges, and
spindles on the disks journaled in the block; whereby motion may be trans-
mitted from one part of the machine to another part in one direction while part
of the machine is free to move with or on the beveled disks.
11. In a bar-support for pantograph engraving machines, the combination with
the spindle 17 secured to one part of the machine, the block 18, the beveled
disks 22-22 and the spindles 21-21, of annular grooves on the spindles for the
balls 26 26, the races 25-25 above and below each series of balls, the lock-
nuts 27-27 in screw-thread engagement with the internally-screw-threaded
holes 28-28, the holes in the peripheral surfaces of the lock-nuts, and the cut-
away portions 29-29; whereby the ball-bearings for the spindles may be adjusted
and the support may automatically adjust itself, as described.
Dated this 23rd day of August A.D. 1899.
Haseltine, Lake & Co.,
JOHN HOPE,
JOHN HOPE, JR.
45, Southampton Buildings, London, W.C., Agents for the Applicants.