US225429A - Machine for punching nuts - Google Patents

Description

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Machine for Punching Nuts.

Patented Mar. 9,1880.

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No. 225,4-29. Patented Mar. 9, 1880'.

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UNITED STATES WILLIAM SHIELDS, OF PHILADELPHIA, PENNSYLVANIA.

MACHINE FOR PUNCHING NUTS.

SPECIFICATION forming part of Letters Patent No. 225,429,

dated March 9, 1880,

Application filed April 5, 1879.

To all whom it may concern Be it known that 1, WILLIAM SHIELDS, of Philadelphia,in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Machines for aching N uts; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification, in which- Figure 1 is a vertical section, and Fig. 2 an elevation.

My invention has for its object to provide means whereby a nut-blank may be cut and punched at each stroke of the plunger of a nutmaking machine.

My improvement consists in the peculiar construction of the plunger and die, said plunger having two punches and the die two corresponding openings, located at such distance apart that the nut-bar will have a support on the die and be held thereon while being cut and punched, as hereinafter set forth, and will require to be moved a distance equal to twice the length of one side of the nut to bring its punched portion from one punch tothe other, the parts named being combined with a holddown, to hold the bar or blank while being cut and to strip the perforating-punch.

Referring to the accompanying drawings, A indicates a plunger-spindle, which is made hollow or formed with a socket, a, for the reception of a spring, B. A is a head on the spindle A, and O a toolstock fastened therein.

D is a round punch for forming holes, and

E a square or angular punch for cutting off the blanks from the bar which is designed to be made into nuts.

F is a stripper and hold-down, consisting of a spindle, f, with shoulder f. Said spindle passes through the tool-stock G and head A, entering the spring B, which passes through the head A and bears down upon the shoulderf, the latter, as shown, being above said tool-stock.

G represents a stationary die having guide blocks 9 g and a gage, g. It has also two openings, g 9 corresponding, respectively, to the punches D and E, and through which the plug out from the bar by the punch D and the blank out from said bar by the punch E severally pass. The punches I) E (as well as the .correspondin g die-openings g g are, from center to center, a distance apart equal to twice the length of one of the sides 6 of the punch E or one of the sides g of the opening g The operation is as follows: The bar from which the nuts are to be formed is fed between the guides g g until its end meets the gage g. The plunger A is now caused to descend by any suitable means-such, for example, as are ordinarily employed for the purpose. The lower end of the stripper and hold-down F, which, it will be observed, is below the cutting-faces of the punches D E, first meets said bar, holding the latter firmly on the die G. The punches D E next meet the bar as the plunger descends, the punch D forming a hole and the punch E cutting oft a square unpunched blank from the end of said bar. The plunger then rises, the bar being held down, however, by the device F until the punch D is stripped or drawn clear out of the opening just formed in said bar. The plunger continuing to ascend, the stripper F is lifted clear of the bar, when the latter is again fed onward until its end meets the gage g. This brings the hole just punched directly beneath the stripper F, which latter is of greater diameter than said hole, so as not to enter the same. The plunger A again descends, the stripper F meeting and holding the bar, the punch D forming another hole, and the punch E cutting offanother unpunched blank. The plunger A again ascends, and the punch D is stripped, as before. The bar is then again fed onward till its end meets the gage g. This brings the hole first punched directly beneath the cutoff punch E, so that the latter, at the next stroke of the plunger, will sever a blank having its hole already formed in it. At every succeeding stroke of the plunger a complete-- '5. 0., cut and punched out--blank will be produced and driven through the opening 9 In other words, a given portion of the nut-bar is first punched, then brought beneath the stripper and held on the die, and then fed forwardly a distance equal to the length of one side of the blanks, and then cut oft, the punching of holes and cutting off of punched-out blanks being, however, simultaneous, so that after two unpunched blanks are first severed a complete punched and out blank is produced at each stroke of the plunger.

The advantage of placing the punches and die-openings the described distance apart is that it permits the simultaneous operation of said punches, while at the same time the bar is supported on the die between them while the punching and cutting are proceeding, and held down while the perforating-punch is ascending.

The bar from which the blanks are cut may be fed either hot or cold, and of such width that its rough edges Will be cut off by punch E.

Although I have described my invention as a means for punching and cutting nuts, I do not limit myself to this application, since it is obvious it may be used as well for washers and all sorts of perforated angular blanks.

What I claim as my invention is 1. In a nut or washer machine, the combination of a perforating-punch anda cuttingoff punch located apart, center to center, from each other a distance equal to the diameter of two nuts or washers to be cut 0E, and a die with matrices relatively so located, with a hold-down between said punches and operating to hold the bar or blank upon said die while being cut and punched and to strip the perforating-punch, substantially as set forth. 2. The combination of plunger A, having spring B, punches D E, and stripper or holddown F, with die Gr, having openings g 9 said stripper being located between said punches and operating to hold the nut-bar on the die between the openings in the latter, as set forth. 3. In combination with hollow or socketed spindle A, spring B, head A, tool-stock O, punches D E, and hold-down or stripper F, the stationary die G, having guides g g, gage g, and openings 9 substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this 26th day of March, 1879.

WILLIAM SHIELDS. Witnesses:

M. D. OoNNoLLY, CHAS. F. VAN HORN.

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