US300379A - Machine foe making shane stiffeiers - Google Patents

Description

(No Model.) 2 Sheets--Sheet 1.

J. LOWE.

MAGHINE FOR MAKING sHANK STIFFENBRS.

No. 300,379. Patented June 17, 1884.v

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MACHINE FOR MAKING SHANK STIFFENERSJ. No. 800,379. Patented June 1'7, 18844.

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JOHN LOXVE, OF PROVIDENCE, RHODE ISLAND.

MACHINE FOR MAKING SHANK-STlFFENERS.

SPECIFICATION forming part of Letters Patent No. 300,379, dated June 17, 1884.

Application filed Jannaryfi, 1853. (No modchl To (0U whom it may cancer/1,.-

Be it known that 1, JOHN Lown, of the city and county of Providence, and State of Rhode Island, have invented certain new and useful Improvements in Machines for Making Shank- Stifteners; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to machines for punchin g and bending metal stiffeners for the shanks of boots and shoes; and my invention consists in certain combinations of devices whereby the punching and bending operations are more eiiiciently and accurately performed, as hereinafter described and claimed.

Figure 1 is a i'ront view of the improved machine. Fig. 2 is a sectional View through the plunger of the machine. Fig. '3 is a perspective view of the shank-stiffener. Fig. at is a view of the lever acting as the discharger and showing its relation to the machine. Fig.

5 is a diagram showing the relative motions ofthe working parts of the machine during one revolution.

Shank-still'encrs-such as the one shown in Fig. 3-have heretofore been made of strips of sheet metal or of flat wire. These stii't'eners require to be very tough, so as to keep the shank in its curved position, and also must have sufficient spring to yield to the bending of the boot or shoe. The stock of which my improved stifi'encrs are made is iron, or, more preferably, steel wire which has been reduced by cold-rolling to a flattened section in which the rounded corners are preserved. 3y this cold-rolling the metal is condensed, the atoms being forced into much closer and more compact relation to each other, the metal becomes tougher and more resilient. The so-prepared metal strips are fed to my improved machine, by which they are punched, out into the required lengths, and stamped into the desired form.

In the drawings, A is the frame of the ma chine. B is the balancewheel secured to the end of the shaft C. This shaft has a crank formed near the center of the machine, to which the plunger D, sliding in the ways (6- d, is secured, so that at each revolution of the shaft the plunger is reciprocated downward and upward through one reciprocation. The end of the plunger is provided with the dovetailed clamp, e c, in one of which the punchdie 1'', and the other the bending-die g, is socured. 1'1 is a shearing or cutting lever, by means of which the strips are-separated into the desired lengths. It is operated by the bell-crank lever i, one arm of which comes in contact with the cam i, secured to the plunger D as the same descends. The curved die g fits the female die g, and as it descends bends the shank-stiil ener and subjects it to considerable pressure. The curvature of the blank is, however, much greater than what is required for the shank-stifl'ener, which, owing to the process of eold-rolling, will spring back and assume the shape shown in Fig. 3.

The prepared flattened wire is supplied to the machine by means of the feednollers L 7:, operated by rack-bar I, engaging with the pinion connected with-the ratchet-gear on the upper roller, 7.. (Shown in Fig. 1.) The rackbarlis connected with the disk m, which is secured to the end of the main shaft (3, so that at each revolution reciprocating motion is imparted to the rackbar Z and the feed -1ollers rotated intermittently to feed the desired length of wire, the said pinion being on the spindle of the roll, and carrying a pawl which engages the teeth of a ratch et-gear ring mount ed rigidly on the said spindle, the arrangement being such that the rolls turn only at the upward movement of the rack-bar. Punches f pierce the wire with two holes, and the cut ter h separates the wire between the two holes so punched, thereby producing the shankstiflener (shown in Fig. 3) with a hole near each end. The shank-stiffener so produced differs from the shank-stifteners heretofore made in that the metal is more condensed, therefore more rigid. The edges of the shank, being cold-rolled from round wire, are round cd and not liable to injure the interior of the shank. The machine operates continuously and discharges the completed shank by means of thelever o, the upper end of which, by coming in contact with the cam o, throws the lower part into the female die 5 and discharges the bent shank-stiffener.

In the diagram, Fig. 5, the line 1 represents the path of the plunger; 2, the feeding device; 3, the cutter, and4 the throw-offor discharger.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In amachinefor making shank-stiffeners, the combination, with the machine-frame and its punching and bending dies, of the plunger arranged to reciprocate vertically in guides on'said frame, the punches and bender, and the cam secured to said plunger, and the shearing-lever and its operating bell-crank lever, all constructed and arranged substantially as described.

2. The combination, with the machineframe and its driving-shaft and the reciprocating plunger actuated by said shaft, of the geared feed-rolls, the rack-bar, and the disk m, arranged to actuate said rack-bar, substantially as described.

k k, and the lever 0, constructed to discharge the work, as described.

JOHN L OWVE.

Vitnesses:

J OSEPH A. MILLER, M. F. BLIG-H.

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