US159559A - Improvement in dies for forming spring-shanks for shoes - Google Patents

Description

a. BR-INER. Dies fo r Furmiti'g Spring-Shanks for Shoes.

Nb.159,5 59 v Patented Feb. 9, 1875.

WITNESSES:

ATTORNEYS.

l mvsmom rrnp STATES ion PA'IEN EMIL BRINER, OF NEW YORK, N. Y,

Specification forming part of Letters Patent No. 159,559, dated February 9, 1875; application filed December 12, 1874.

To all whom it may concern:

Be it known that I, EMIL BRINER, of the city, county, and State of New York, have invented anew and Improved. Press for Punching Spring-Shanks, of which the following is a specification:

In the accompanying drawing, Figure 1 represents a top view; Fig. 2, a vertical longitudinal section on the line 0 c, Fig. 1, of my improved press for punching spring-shanks; and Fig. 3, a side View of the plunger for cutting off the blanks.

Similar letters of reference indicate correspondin g parts.

The invention will first be fully described, and then pointed out in the claims.

In the drawing, A represents the -stationary main part or casing of my improved punchingpress, which is securely attached to side guide-pieces, B, on a supporting-bed, forming between the guidepiece-s a cavity or pan, into which the shanks are dropped for being fed forward in regular order. The main part A is constructed of three separate parts, having entirely diiferent functions, and forming a kind of easing, into which the plunger 0 enters when sliding forward on pieces B, or other. suitable guide mechanism, reciprocating motion being imparted to the same by machinery of suitable power. At the uppermost part of main casing A is arranged rigidly the steel cutting plate or die D, which has above the cutting-edge a vertical guide-frame, through which the piece of sheet metal from which plunger. The plunger 0 is also constructed of three different parts with a top cutting plate or die, 0 whose upper cutting-edge, however, is at the height of the lower cutting-edge of the die-plate of the main casing, and concaved slightly from the edges toward the center, for

the purpose of shearing off the blank gradually without cutting across its whole width at the same time. This facilitates the cutting considerably and requires less power,while imparting at the same time to the blank a tendency to bend easier at themiddle part. Below the cutting-plate D of main casing A. is arranged a sliding spring-acted bolt, D which is thrown forward its movement being limited by guideslot and stop-pin, to such a position that its face is vertically in line with that of the cutting-plate D, and comes in contact with the punched off blank on each stroke of the plunger, pressing the same, while receding against the face of the cutting plate or die of the plunger, and preventing the dropping of the blank. Upon the return of the plunger the blank cut from the plate on the forward movement is carried between the spring-bolt D and the cutter, until the bolt reaches its extreme forward position, when the continued retreat of the cutter releases the blank, which falls down past the gage-pieces a, the ends of the blank-being bent by the curved form of the cutter, so as to permit its passage. The

blank is received on a projecting plate, 0 in front of the shaping-die 0 below the cuttingdie-O The shaping-die 0 of the plunger 0 corresponds to the form of the springshank to be produced, the curved or concaved part of the same being, however, curved to a greater extent than the shape of the finished shank, for the purpose of allowing for the elasticity or spring of the metal. The correspondinglycurved convex shaping-die D .of the main part fits exactly to the die 0 and imparts therewith the required degree ofcurvature or spring to the shank. The drop-plate G is provided with a shank-shaped slot, 1), at such a distance in front of the concave shaping-die C that when the shank is released by the return motion of the plunger from the shaping dies the same springs forward toward the slotted recess b, for assuming its permanent curved shape, and drops through the same to the pan below. The curved recess b is made of such width that shanks of metal of slightly-varying tension, and consequently different extent of spring motion, may readily fall within the slot and be dropped through the same. The rapid forward motion of the plunger carries the punched-off blank over the recess without any chance of its passing through the same, while instantly after the commencement of the return stroke the shank drops into the pan below, arranging itself regularly back of the others in front. Set-pieces 'G at both sides of the plunger below the dropplate 0 extend with their faces forward to the drop-re :ess, and correspond in shape therewith, for feeding the whole set of shanks in the pan in forward direction at each forward stroke of the plunger, producing thereby a space sufficient for the unobstructed dropping of the next shank. The guide-plates a, on which the metallic sheet for cutting ofii' the blank is seated, project toward the inside, and serve, in conn ction with side grooves, a, of the plunger, as steadying devices for securing the accurate andv regular action of the press.

The shanks are fed forward on the drop-pan, either to a suitable receptacle or directly through the annealing-oven, for being tempered to the required degree of spring power. A set of main casings and plungers may be arranged sidewise of each other for the same or different sizes of shanks, so that at each stroke several of them are produced ready for annealing, and thereby the manufacture of spring-shanks not only greatly expedited, but also economized, as the space and time through which the shanks have to pass are reduced by the compact shape and construction of the press to a small and very effective compass.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination of the cutters O D, spring-follower D supports a, and shapingdies (3 D in the manner and for the purpose specified.

2. The combination, with plunger 0, of the snbjacent pushers G G and casing A, having passage below the die D as and for the purpose set forth.

EMIL BRINER.

Witnesses PAUL GOEPEL, T. B. MOSHER.

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