US665097A - Pantograph engraving-machine. - Google Patents

Description

No. 665,097. Patented Jan. I, I90l.

JOHN HOPE & JOHN HOPE, In. PANTOGBAPH ENGRAVING MACHINE.

(Application filed Aug. 21. 1899.)

.2 Sheets-Shut 1.

(No Model.)

zzxz YEN Z'DH No. 665,097. rammed Ian. I, I90l.

JOHN HOPE & mun HOPE, In. PANTUGRAFH ENHRAVING MACHINE.

(Appliatidn'filed A; 21. 1899.) (N0 "0 r 2 Shaw -Shoot 2.

s A \x f 1 WITNEEEiEE/I fiamzgzmy? J erence being had to the accompanying draw- NITED STATES PATENT FFICE.

JOHN HOPE AND JOHN HOPE, JR., OF PRovIDENoE, RHODE ISLAND, AS- SIGNORS TO THE JOHN HOPE. & SONS ENGRAVING AND MANUFAC- TUBING COMPANY, or SAME PLACE.

PANTQG RAPH ENG RAVlNG-MACHIN E.

SPECIFIQATION forming partof Letters Patent No. 665,097, dated January 1, 1901.

Application filed August 21, 1899.

To all whom it may concern.-

Be it known that we, JOHN HOPE and JOHN HOPE, Jr, of Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Pantograph Engraving-Machines; and we hereby declare that the following is a full, clear, and exact description of thesame, refings, forming part of this specification.

This invention has reference to an improvement in pantograph engraving-machines; and it consists in the peculiar and novel construction and the combination 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 pattern is placed on the table of the pantograph engraving-machine and is traced by the stylus, supported usually on a carriage, the longitudinal motion 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 flowers 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 move 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 oppositedirections on a predetermined reduced scale. The required diminution of the pattern engraved onthe roller from the pattern traced by the stylus determines the adjustment of the transmitting mechanism, so that apattern may be transferred to the rollers, if de- 7 V with stops.

sired, in the same design on a larger scale and Serial No. 727,876. (No model.)

of the movement of the carriages without disturbing the adjustment, so thata multiple of I designs may be simultaneously engraved on one roll in opposite directions while the operative guides the stylus over one pattern.

Figure 1 is a transverse sectional view of .part of a pantograph engraving-machine illustrating our invention. Fig. 2 is a top View of the bracket connected with the lower carriage, showing the slotted portion through which the actuating-spindle operated by the movement of the stylus-carriage extends.

Fig. 3 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-nut of the ball-bearing is adjusted. Fig. 4. is a vertical sectional view of the actuating-spindle, showing the reversible arms operating the carriages and the antifriction ballbearings for the actuating-spindle. Fig. 5 is a top view of one of the carriage-operating arms and the supporting-plate provided Fig. 6 is a side View, partly in section, of the same. Figs. 4, 5, and 6 are shown on an enlarged scale.

Similar marks of reference indicate corresponding parts in all the figures.

In the drawings,Aindicates the main frame of the machine; A, the bracket, extending rearward from the main frame and forming the journal-support for the actuating-spindle; A the stylus-carriage, and a a bar extending longitudinally on the stylus-carriage. From this bar a, the in ward and outward movement of the stylus-carriage is transmitted to the roller being engraved. a is a bar extending transversely to the stylus-carriage. On this bar a rests and moves longitudinally the lever-operating device G2, called the mushroom, consisting of a frame revolving freely on a post and provided with two conical disks secured to revoluble spindles. The beveled edges of the disks are in contact with the bar a and move freely longitudinally on the bar, transmitting, however, every movement of the stylus-carriage at a right angle to the bar a. The spindle of the mushroom a is secured in the end of the lever b, pivotally secured to a fork attached to the actuatingspindle B, journaled in the bracket A. To the upper end of the actuating-spindle B the plate I) is keyed or otherwise rigidly secured, so as to turn with the actuating-spindle B.

On one side of the plate Z) are the stops 1) b which are accurately planed, milled, or otherwise finished to form the stops for the arm b secured by a set-screw to the projecting end of the actuatingspindle B, so that it can be reversed and secured in two opposite positions, bearing on one or the other of the stops b Perpendicularly over the axial center of the actuating-spindle B the post 11 is secured to the arm Z2 near the upper end of which post 17 is rigidly secured another plate I), provided with the stops b 19 and to the projecting end of the post b is secured another arm b so 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 accurately done without changing the adjustments by releasing the lower arm 17 and turning it, with the post I) and the upper arm 5 through half a circle until the lower arm 5 bears against the opposite stop 11 and then securing the arm again to the actuating-spindle. By thus reversing the positions of the arms b the movement 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 19 b 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 I) are in the exact center of the arms, and the grooves 79 12 extend along the centers of the arms The grooves are undercut and form the ways on which the slides Z9 U are supported and secured by the bolts Z1 If. The arms 12 b are provided with a graduated scale and the slides b with a zero-mark, so that the slides may be accurately adjusted on the arms and require no readjustment when the arms are reversed. The slides support the spindles of the mushrooms b 17 on the upper one of which rests the arm I), pivotally secured to the carriage b, and on the lower mushroom rests the arm b pivotally secured to the carriage I1 The arm 19 is provided with the slot Z2 through which the post 19 forming the extension of the actuating-spindle B, passes. The carriages b and D support the diamond gravers.

The bar a on the stylus-carriage A transmits the inward and outward movement of the stylus-carriage through a mushroom a to a lever similar to the lever 19, connected with a spindle supported in the bearing a An arm similar to the arm b is secured to the upper end of the spindle. The arm is provided with aslide b supporting a mushroom 11 which connects with a bar on the carriage a connected in the usual manner with the roll to be engraved 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 races for a series of balls 0 c. The race-rings c c and the nut-lock rings 0 c are in screw-thread engagement with the sleeve 0 and are provided with a series of radial holes bored into their peripheral surfaces. The sleeve 0 is provided with openings 0 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 movement and turns freely on the ball-bearings.

Having thus described our invention, we claim as new and desire to secure by Letters .Patent 1. 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, means for securing the arm to the spindle, a slide adj ustably secured on the arm, a carriage for supporting the gravers, and connections between the carriage and the adj ustable slide; whereby the movements of the carriage may be reversed without adj usting the slide, as described.

2. In a pantograph engraving-machine, the combination with the actuating-spindle, and connections to the actuating-spindle from the stylus-carriage, of a tool-actuating arm journaled on the actuating-spindle, and a bolt for securing the arm to the actuating-spindle; whereby the position of the arm may be reversed, as described.

3. In a pantograph engraving-machine, the combination with the actuating-spindle, and connections between the actuating-spindle and the stylus-carriage, ot' a plate secured to the actuating-spindle, stops 011 the plate, a tool-actuating 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 mechanism may be reversed, as described.

4. 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.

5. In a pantograph engraving-machine, the combination of the following instrumentalities: a stylus-carriage, a rotatable actuatingspindle supported on ballbearings, 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 styluscarriage; whereby the motions transmitted JOHN HOPE. JOHN HOPE; J R.

Witnesses:

B. M. SIMMs, J. A. MILLER, Jr.

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