US1097669A - Punch. - Google Patents

Description

G. R. PHILP.

PUNCH.

APPLICATION FILED MAY23, 1913.

1,097,669. Patent d May 26, 1914.

Inventor Attorneys tlNfTED STATES PATENT OFFICE.

GEORGE R. PHILP, OF LAKE CITY, MICHIGAN.

PUNCH.

roaacco.

Application filed May 23,1913.

To all whom it may concern Be it known that l, Gnoncn R. Pninr, a citizen of the United States, residing at Lake City, in the county of lllissaukee and tate of Michigan, have invented a new and useful Punch, of which the following is a specification.

The present invention appertains to a novel and improved punch for sheet metal or other stock.

It is the object of the present invention to provide a punch which is operable either by the hand or foot of the operator.

Another object of the present invention is to provide a device of the nature indicated which shall be improved gene "ally in its con struction and operation, the device being comparatively simple, durable, substantial, compact and inexpensive in construction, as well as serviceable, convenient and efficient in its use.

lVith the foregoing and other objects in view, which will be apparent as the description proceeds, the present invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention has been illustrated in its preferred embodiment in the accompanying drawing, wherein Figure 1 is a side elevation of the improved device. Figs. 2, 3, l, and 6 are sectional views on the lines 22, 3-3, il-, 5-5, and 6-6, respectively, of Fig. 1. Fig. 7 is a plan view of the beam lifting spring. Fig. 8 is an enlarged elevation of the male die. Fig. 9 is a fragmental detail of the stock holding member.

In carrying out the invention, reference being had in detail to the drawing, there is provided a base 11 comprising a bar of suit able metal set on edge and having its forward end bent or formed into an eye 12. lhe base 11 as well as the other parts hereinafter described, may be of any suitable dimensions or proportions, according to the circumstances. A beam 13 fashioned from a bar of suitable metal is disposed above the base 11, and has its forward end bent or formed into an eye 1% complementing the.

Specification of Letters Patent.

Patented May 26, 1914.

Serial No. 769,543.

eye of the base, while the rear end of the beam 13 is bent or deflected downwardly and bifurcated or forked as at 16, to straddle the base 11 adjoining its rear end. A fulcrum pin 17 has its ends or terminals loosely ournaled within the branches of the fork 16, and has its intermediate portion seated within a notch 18 provided in the upper edge of the base 11. A. pair of uprights or standards 19 are riveted at their ends to the sides of the base 11 adjoining the forward end or eye 12 of the base, while a similar pair of uprights or standards 20 are riveted to the sides of the base at its rear end, the said uprights or standards being fashioned from suitable bars of metal, and having their lower ends bent angularly or outwardly into feet 21 adapted to be attached to a bench or table top, or other surface for maintaining the device in position. The forward uprights 19 are relatively long, while the rear uprights 20 are relatively short, the beam 13 working snugly between the up rights 19 so as to be guided for vertical movements by the saiduprights 19.

An operating lever 22 is provided with an eccentric or cam 23 at one end, the said eccentric or cam being fulcrumed between the upper ends of the uprights 19 by means of a bolt 9.411'and being designed to engage the upper edge of the beam 13. The eccentric or cam 23 is so designed that it may engage the beam 13 either in rear or-in advance of the uprights 19, whereby the lever may project either rearwardly or forwardly to be operated by the foot or hand, of the operator, whichever is desired. As seen in Fig. 1, the lever is shown in full lines projecting rearwardly, for the attachment of a connecting rod to permit the lever to be depressed by a foot treadle, or the like. In the said figure, the lever is shown as thrown forwardly, in dot and dash lines, to be oper ated by the hand of the operator, as will be apparent. In either event, the depression of the free end of the lever will serve to forcibly depress the beam 13 for bringing the dies together, as will hereinafter apear.

A clutch 26, which is in the form of an elbow or angular member, has one arm or one end fulcrumed between the upper ends of the uprights 20 by means of a pin 27, in order that the lower edge of the other or free arm will cooperate with the upper edge 1 of the base 11 within the fork 16 of the beam. The lower edge of the free arm of the clutch 26 is provided with a notch 28 engaging over the pin 17, while the other or pivoted arm of the clutch is provided with a rearwardly projecting tail or finger 29 protruding from between the uprights and having a washer 30 and a nut 31 engaged thereon. The washer 30 contacts with the rear edges of the uprights 20, while the nut 31 is threaded upon the tail 29 to draw the clutch 26 rearwardly to thereby force the free arm of the clutch downwardly and to firmly grip the fulcrum pin 1'7 in position, so that the fulcrum pin will be constrained against rotating. In this manner, the branches of the fork 16 are mounted to swing upon the ends of the fulcrum pin 17, and if the clutch 26 is loosened, the fulcrum pin 17 may be withdrawn and replaced whenever desired.

In order to normally press the beam 13 upwardly, the leaf spring 32 is secured to the base 11 and engages the beam 1", as will be presently described. The leaf spring 32 is preferably tapered from its butt end or heel to its tip or free end, as seen in Fig. 7, and is provided at its butt end or heel with an extension 33 projecting within the fork 16 of the beam and below the free end or arm of the clutch 26. A pin 34 is disposed between the extension 33 of the spring and the free arm of the clutch 26, the said extension of the spring and arm of the clutch being notched so as to receive the pin 34 to prevent the spring from shifting longitudinally when the clutch is tightened. The free end of the leaf spring 32 engages the lower edge of the beam 13 in order that the upward tension of the spring will raise the beam when free. The female die 35 is secured within the eye 12 of the base, the upper portion of the eye 12 being preferably cut away and the eye 35 being preferably provided with the flange 36 fitting within the cut away port-ion flush with the upper edge of the base 11. The male die or bit 37 is provided with an inverted, conical enlargement 38 providing a shoulder bearing against the lower end of the eye 14, said die having an upstanding shank 39 projecting from the enlargement 3S and fitting within the eye 14. Set screws 40 are engaged through the eyes 12 and 14 to bind the female die 35 and shank 39 of the male die within the respective eyes or sockets. The active end or face of the male die 37 is of novel formation, the same being beveled or inclined from one side to a point short of the other side, as at 41, to provide a sharp projecting piercing point 42 at the first mentioned side and an inset severing shoulder 43 at the opposite side. The point 42 is adapted to readily pierce the sheet metal or other stock while the shoulder 43 completes the operation and severs the disk or piece punched from the stock.

The stock holding member embodies a block 44 mounted on the upper edge of the base 11 between the uprights 19, a pin 45 being passed through the uprights 19 and engaging within a notch 46 provided in the upper edge of the block 44 to maintain the said block in position. The block 44 is providcd with a forwardly projecting arm 47 spaced slightly above the base 11 and provided at its forward or free end with a fork 48 above the female die and through which the male die is projectable. The sheet metal or other stock is adapted to be received between the arm 47 and the upper edge of the base 11, so as to stand over the female die.

From the foregoing, taken in connection with the drawing, it will be evident that the several parts may be inexpensively manufactured and readily assembled, the several parts being readily taken apart for purpose of repair or displacement, whenever desired.

In use, the sheet metal or other stock to be punched is introduced over the female die below the fork 48 of the arm 47, and by depressing the free end of the lever 22, the beam 13 may be depressed in order that the male die carried by the free end of the beam 13 may be brought into cofiperation with the female die. The male die in being depressed may readily punch a hole in the stock, due to the particular construction of the male die, the disk or piece severed passing through the female die 35, which is hollow or tubular for this purpose. After the operation above described, the lever 22 is released, which will permit the spring 32 to come into play for raising the beam 13 and consequently retracting the male die from the female die. The arm 47 will pre vent the stock from being raised with the male die, and will serve to hold the stock in position on the female die, in order that the stock may be slid to a new position for a second operation, if so desired.

Having thus described the invention, what is claimed as new is 1. In a device of the character described, a base, a beam, cooperating dies carried by the said members, a fulcrum pin journaled to the beam, the fulcrum pin resting on the base, a clutch engageable over the fulcrum pin, and means for clamping the clutch upon the fulcrum pin.

2. In a device of the character described, a base, a beam having a fork at one end, the base and beam having cooperating dies, a fulcrum pin journaled to the branches of the fork and resting upon the base at its intermediate portion, a clutch projecting within the fork and engaging over the fulcrum pin, means for clamping the clutch over the fulcrum pin, and a leaf spring having its butt end clamped between the clutch and base, the free end of the leaf spring contacting with the beam to lift the same.

3. In a device of the character described, a base, a beam having a fork, the base and beam having cooperating dies, a fulcrum pin having its ends journaled through the branches of the fork, the intermediate portion of the fulcrum pin resting on the base, an upright secured to the base, a clutch pivoted to the upright and projecting Within the fork, and means for operably connecting the clutch and upright for clamping the clutch over the fulcrunrpin.

at. In a device of the character described, a base, a beam having a fork, the base and beam having cooperating dies, a fulcrum pin having its ends journaled through the branches of the fork, the intermediate portion of the pin resting on the base, uprights secured to the sides of the base, a clutch pivoted between the uprights and projecting within the fork to engage the fulcrum pin, the clutch having a projection protruding from between the uprights, and a member threaded on the projection and engaging the uprights to clamp the clutch member over the fulcrum pin.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

GEORGE It. PHILP.

Witnesses EVERETT REEDER, Eva LA DOUGEUR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, .D. G.

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