US549694A

US549694A - Punching-machine

Info

Publication number: US549694A
Authority: US
Publication date: 1895-11-12
Anticipated expiration: 1912-11-12

Description

(No Model.) I

E. vB. STIMPSON. PUNHING MACHINE.

N0. 549,694. Patented NOV. 12, 18945.

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I UNITED STATES PATENT OFFICE.

EDWIN B, srIMPsON, OF BROOKLYN, NEW YORK.

PUNCHlNG-NIACHINE.

SPECIFICATION forming part of LettersPatent No.Y 549,694, dated November 12, 1895.

Application iiled March 16, 1894.

To all whom t may concern:

Be it known that I, EDWIN B. STIMPsON, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Punching Machines, of which the following is a specification.

My invention relates most particularly to that class of punching-machines employed for ornamenting shoe-tips wherein a gang of punches, sometimes of different sizes and forms, are set in a punch-plate in a manner to form an ornamentally-perforated border on the tip. In this class of machines it is desirable that the punch-plate and die-plate shall be readily removable from the machine in order that they may be substituted by others. It is also desirable that the under side or lower face of the punch-plate shall be free from holes, slots, or recesses in order that it may be utilized to the best advantage for setting punches therein in patterns. Keeping in view these requirements, the object of my invention is to provide means for securing the punch-plate and die-plate firmly and Y quickly in place and in such a manner as to be readily removed for substitution by others. At the same time the device for securing the punch-plate to the plunger-head is so constructed that it does not interfere, with the setting of punches in said plate at any point desired and to form any desired pattern.

In carrying out the invention the fastening or securing devices are so arranged as to prevent them from being lost or mislaid.

In the accompanying drawings I have illustrated an embodiment of my invention. Figure 1 is afront View of a part of a punchingmachine furnished with my improvements. Some of the parts are represented as broken away or in section, as will be hereinafter explained. Fig. 2 is a plan of the plunger-head, showing the locking-levers.' Fig. 3 is a detached perspective view of one of the studs in the punch-plate. Fig. 4: is a sectional view, and Fig. 5 a plan view, of the plunger-head and punch-plate, illustrating a form of the fastening differing slightly from that shown in Figs. 1 and 2. Fig. 6 is a view of the fastening for the die-plate as seen from the under side of the machine-bed. Fig. 7

Serial No. 503,840. (No model.)

illustrates a slight modification of the fastening illustrated in Fig. l.

Before describing the construction illustrated I may say that I have not deemed it necessary to show the entire punching-machine, as these machines are well known and they vary considerably in general construction and form.

The punching-machine to which my improvements, as herein illustrated, are intended to be applied comprises a suitable bed A, on which is mounted a head, (not shown,) and in this head is mounted a reciprocating plunger B, bearing a plunger-head C. Mechanism of any kind may be provided for depressing and retracting the plunger.

`Usually a cam and lever device is employed for this purpose. On the plunger-head is removably secured a punch-plate D, provided with a series of punches CZ, and on the bed is removably secured a die-plate E, provided with dies lor holes which register with the respective punches. The die-plate is provided, ordinarily, with a stripper F, having holes in which the punches play.

All of the 'above features are, broadly considered, old and well known. My invention, which will now be described, relates to the means for securing the punch-plate D and dieplate E removably to the plunger-head and base, respectively.

Referring first to Figs 1, 2, and 3, the punch-plate has secured in it and projecting from its upper face or back two locking-studs G, preferably situated near' its respective ends, and the plunger-head has in it two holes c, which are so spaced as to register with these studs. In Fig. 1 the punch-plate and plunger are broken away at the right hand so as to show the stud at that end in place. In one side of the stud G at the point where it emerges from the-hole in the plunger-head is formed a transverse slot g. (Seen best in Fig. 3.)

On the upper face of the plunger-head are pivotally mounted two like locking-levers H. Each lever is pivoted at fr and is provided with a cam h, which is so placed as to engage the slot g in the locking-stud when the lever is in the position indicated in full lines in Figs. l and 2. The upper face of the cam g is beveled or inclined, as clearly seen in Fig. l,

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so that when the lever is drawn in such a manner as to put the cam h in engagement with the recess g in the locking-stud its beveled surface will take under the shoulder formed at the upper edge of said recess and draw the punch-plate D up firmly to the plun ger-head. By throwing the levers II back to the position indicated by dotted lines at the right in Fig. 2 the punch-plate may be removed by withdrawing the locking studs from the holes in the plunger-head.

By cutting a recess, as g, in the stud G a shoulder is formed for the cam to engage without any lateral projection on the stud which would prevent it from passing up through the hole in the plunger-head; but in Fig. 7 I have shown another way of providing such a shoulder. In this view the stud G is represented as provided with a laterallyproj ectin g pin gx, which forms the shoulder, and the hole c in the plunger-head has a groove cx, like a keyway, to permit said pin to pass when the stud G is inserted.

Figs. 5 and l illustrate another construction, wherein a head g is formed on the stud G to provide the necessary shoulder. In this case an open slot cL extends from the hole c (see Fig. 5) to the edge of the plunger-head to permit the stud G to be inserted by a lateralmovcment. This view, Fig. 5, also shows the cam h made inthe form of a fork, so as to take under the head g of the stud at both sides. In all the several varieties of the construction the studs G are secured firmly in the plate, as they need not be removed, and the locking-lever is attached to the plunger-head, so that it will not be lost or displaced.

The die-plate Il is secured removably to the base A in a manner somewhat similar to that described. The construction of the fasten ing is illustrated in Figs. l and G. In Fig. l the bed and a part of the die-plate are represented in section to show the parts in place.

In the die-plate E are two holes e, preferably near the respective ends of the plate, and in these holes are locking-studs I. The shank of the stud I lits snugly but loosely in the hole in the die-plate, and said stud has a head 'i at each end so that it cannot escape from the hole e. In the bed A, and properly registering with the studs in the die-plate, are holes a of such size as to allow the heads yi on the lower ends of the studs to pass. Pivotally mounted at y/ on the under side of the bed are locking-levers IIA", substantially like the levers II before described, and provided each with a beveled cam hx to engage the shoulder formed by the lower head a on the bolt I and draw the die-plate down firmly to the bed. Ordinarily the punch-plate and dieplate are connected when placed in the machine, the punches l being pushed down into the dies or holes in the die-plate. Thile thus connected, they are passed under the uplifted plunger-head, the studs G passed up through the holes e in the head C, and the locking then eifected with the levers Il. The studs I are then dropped through the holes in the bed and the plunger depressed, so as to seat the die-plate on the bed while the punches are in their holes. Then the die-plate is seated, the lookin g is elected by the levers I-Ix.

The above mode is a convenient way of setting the die-plate and punch-plate in place; but they may be put in place as preferred by the operator.

So far as the means for securing the dicplate on the bed is concerned, this may be employed in connection either with the de* vice for securing the punch-plate shown in Figs. 1 and 2 or with that shown in Figs. 4 and 5. This latter is the form of fastening device for the punch-plate which l believe to be new.

Having thus described my invention, l claiml. In a punching machine, the combination of a plunger-head having parallel open-ended slots, a punclbplate having shouldered lugs adapted to enter said slots and locking-levers mounted on the plunger-head in position to engage the shoulders on said lugs, whereby the attachment and removal of said punchplate are greatly facilitated, substantially as set fort-h.

2. In a punching machine, the combination with thc apertured bed and apertured dieplatc, of the loose, double-headed lockingstuds in the die-plate, and the locking-levers mounted on the bed and adapted to engage the shoulders formed by the lower heads on the respective locking-studs, substantially as set forth.

The combination in a punching mach ine of the apertured bed A, the slotted plungerhead C, the locking-levers IIx, mounted on said bed, and the locking-levers II, mounted on said plunger-head7 of the punch-plate l), provided with shouldered studs lr, adapted to enter the .respective slots in the plungerhead, and the loose, double-headed studs I, mounted in the die-plate and adapted to pass down through the apertures in the base and be engaged by the locking-levers I'l, substan-' tially as set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

EDWIN B. STIIHPSON. lVitnesses I'IENRY CoNNE'rT, 'PETER A. Ross.

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