US3077A - Improvement in machines for punching holes in iron or other metallic plates - Google Patents

Description

claim and Wish to have secu-red to us by Lef- Vbe punched.

Y j NTTED STATES PATENT OEEICE.

TVILLIAM ADAMS AND ARTEMUS HAMMOND, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN MACHINES FOR PUNCHING HOLES IN IRON 0R OTHER METALLIC PLATES.

Specification foi-ming part of Letters To all whom it may concern,.-

Be it known that we, WILLIAM ADAMS and ARTEMUS HAMMOND, both of Boston, in the county of Suffolk and State of Massachusetis, have invented a new and useful machine for punching holes in iron or other metallic plates, so as to give said holes the peculiar "bui-r on their inner or under sides which is indispensably requisite for sparkers'of locomotives; and l do hereby declare that the following description of our improvements, taken in connection with the accompanying drawings hereinafter referred to, forms a full and exact specification of the same, wherein we have set forth the nature and particulars of our invention by which it may be distinguished from others of a similar class, together with such parts or combinations as We ters Patent.

The object of our improvements is to produce the holes with the burr, as above suggested, more rapidly or expeditiously than they have hitherto been made, and at the same time (and by a peculiar connection or combination of the punching machinery with that which moves the plate to be punched along) to form the holes very near to each other and at regular distances apart.

In the drawings above mentioned,Figure l is a plan or top view of our punching-machine. Fig. 2 is a front elevation. Fig. 3 is a side elevation, and Fig. 4 is a transverse vertical section on the line A B, Fig. 1.

A A A A in the several drawings represent the frame work, which may be constructed in any suitable manner to enable it to support the machinery during its operation.

B B- is a strong bed-piece or table of wood or iron, which is arranged so as to move-forward and back longitudinally on the guiderails O C, Figs. l, 2, 3, and 4, a distance equal to the length of the longest sheet of metal to On each side of the table B B a rack-plate D is fixed, the teeth of which engage with those of the pinions E E, properly situated or placed on the turning shaft F, as shown in Fig. 4, which shaft has proper bearings in the frame-work.

A rectangular adjustable frame G G rests on the top of the table B B, in which a simi- Patent No. 3,077, dated May 8, 1843.

larly-shaped plate or tablet H, Figs. 1 and 4, of lead or othersuitably soft metal, is arranged in any proper manner so as to be controlled by or moved with the said frame G G, and on this tablet or plate H the sheet or strip of metal I to be operated upon is properly confined, as will be more fully explained hereinafter.

The frame G G and consequently the tablet H and sheet l are moved laterally to and fro any required distance by means of the revolving screws K K, Figs. l and 2, arranged, as seen in the drawings, one at the front and the other at the rear of the table B B. screws rest and revolve and are conned so as not to advance in the projections L L L L from each end of the table B B. Nuts M M, with proper screws formed therein, depend (one from each end) from the adjustable frame G G, which nuts move forward and back on the screws K K in accordance with the revolutions of said screws, and consequently change the position of the frame G G as desired. EachA of lt-he screws K K has a beveled geared pinion N N, which two pinions engage with the teeth of similar ones O O on the long shaft P, Figs. l, 2, and 4, and by turning said shaft th rough the medium of the crank Qthe screws K K will be equally and simultaneously revolved and the frame G G moved regularly in either direction.

The apparatus forl punching is arranged at about the center of the machine and between the two upright standards R R, which are fastened to the exterior ofthe frame-work A A. The punches or tools d a, Figs. 2 and 4, for forming the holes are fixed, two or more of them, in the vertical piston b, which moves up and down in proper guides and is connected at its top to one end of a connectingrod c, Figs. 2 and 4, said connectingrod at its opposite end being secured in any proper manner to the bell-crank d of the driving shaft e e, Figs. 1,-2, and 4. This shaft e e is provided with a fast and loose pulley at f and a sliding lever-staple arranged near it, as shown in Fig. 1, which serves to change or shift the belt in the usual manner. A bent spring g, attached to the under side of the frame-work jjjj between the standards R R,

(which frame-Work may be arranged as seen in Figs. 2 and 4 or in any other sufciently These successive holes or sets of holes.

strong manner,) and a guiding wheel or roller h, attached to the side of the adjustable framepiece t i', serve to prevent the plate of iron from being drawn up with the tools or punches after it has been pierced by the same. A roller or cylinder le, suit-ably supported, as shown in Fig. l, assists the spring g and wheel h in keeping the frame G G and parts moving with the same in contiguity with the table B' 13', and the said table B B' is kept in its horizontal position during its motion forward and back by the roller Z in the` adjustable block m, screwed to the frame j j, the., as shown in Figs. 1, 2, and 4.

The table B' B', frame G G, tablet H, and plate of metal I, arranged together, as hereinbefore described, are advanced a regular distance after each descent of the punching-piston by the following novel combination of machinery: A cam or eccentric n, shaped as seen in Fig. 3 and shown in Figs. l, 2, and et, is fixed on one end of the driving-shaft@ e, which, as has been shown, operates the punching-piston l). The cam 'n works on the top of the vertical pawl o, which moves up and down in the guide-blocks p p, and is supported justbeneath the upper guide-block by means of thepin q resting on the top of the spiral or helical spring rr, which springis wound round the pawl 0 between the guide-blocks and rests at its bottom on a shoulders on the top of the lowerguide-block. The lowerend of the pawl o engages with the teeth of the ratchet-wheel t on one end of the shaft F, on which the pinions E E are fixed, said pinions working the table B' B forward and back, as hereinbefore explained. There is a spring a behind the lower part of the pawl o to keep it in its proper position anda secondary orspring` pawl tr, which engages with the ratchet-wheel t below the point where the main pawl o operates, said spring and pawl being properly secured to the outside of one of the standards R.

From the above specilied arrangement of machinery it will readily be seen' that at each revolution of the shaft e c and after each descent of the punching-piston the pawl o by the action of the cam n will cause the ratchetwheel t to turn a distance equal to the space between any two of its teeth,thereby moving the table B' B', and consequently the plate of metal I, a sufficient distance before the next descent of the punching-piston to leave the proper or requisite space between any twov After the pawl o has moved the wheel t, as specified, the spring o" r withdraws said pawl upward until the lower end comes in contact with the next tooth above that which it has previously operated upon, where it remains in readiness for the next revolution of the cam n. After holes have been punched throughout the length of the plate on one ora double line the pawls are thrown out ot' connection with the ratchet-wheel t by means of the compound lever w :r y, having proper prongs z z, which press against the pawis, as shown in Fig. 3. Vhen this is accomplished, the table B' B' may loeY moved back by means ofn the crank a' on the shaft F toits starting position. The frame G G, with the tablet H and plate I, are then moved sidewise a little, as hereinbefore shown, by turning the shaft P, and are then in position for forming another line or doubleV line of holes.

The use of the leaden tablet- H is an important feature in our invention, as the solid punch, which does not cut but a small particle of iron ont of the plate, merely pierces the plate and sinks into the leaden tablet, and thereby forms that peculiar burr so indispensably requisite in sparlters for arresting the cinders, dvc., which escape from the fuelchambers of locomotives.

Having thus described our improvements, we shall claimrlhe combination of the bed piece or table B' B', which moves longitudinally, as speci-v fied, and rectangular frame G G, which is moved laterally, as set forth, and leaden or other suitably soft metallic tablet H, arranged in said frame G G, as' described, with the punching-piston, in which the solid punches or piercing-tools are fixed, the wholek being, substantially as hereinbefore described, for the purpose of punching successive holes or sets of holes in successive lines in a plate 4of metal and for giving said holes on one side the peculiar burr requisite in sparkers of locomotive's.

In testimony that the foregoing is a true description of our said invention and improvements we have hereto set our signatures this (3th day of March, 18435.

VILLIAM ADAMS. ARTEMUS HAMMOND.

Witnesses:

R. H. EDDY, v EZRA LINCOLN, Jr,

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