US38463A - Improvement in shoe-pegging machines - Google Patents

Description

UNITED STATES PATENT OFFICE.

VIILLIAM G. BUDLONG, OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT IN SHOE-PEGGING MACHINES.

Specification forming part of Letters Patent No. 38,463, dated May 12, 1863; antedated June 30, 1862.

'made to the annexed drawings, making apart of this specification, which are fully referred to by letters herein, and in which similar letters indicate similar parts throughout the figures.

My improvement in machines vf'or pegging soles of boots and shoes has reference to that class capable of performing the operations by motive power and automatically.'

The first part of my invention consists in the manner of operatin g the awl and peg driver or hammer. The second is a means for regulating the force of the descent of the peg driver. The third is the arrangement of the several parts which work in connection with the main shaft and cams to effect the proper propulsion of the Vsaid several parts.

The machine is supported upon a suitable table or bench in such manner that the awl and peg-driver shall project sufficiently to allowv of the sole ofthe boot or shoe being placed beneath in order to receive their action. All the parts are caused to move by power applied to a single shaft, as shown at A in the several figures. The awl and the peg-driver have motions vertically and laterally in the same planes in both directions and at fixed distances apart, so that while a hole is being made by the awl in the sole a peg shall at the same time be undergoing the operation of being cut from the peg-wood and driven into the hole made at the previous descent of the awl.

It is considered an important principle in pegging soles by machinery that the pegs be driven by some instrument having an action similar to that of a hammer-z'. e., driving by percussion-as then the wood is less liable to be broken or crushed than when driven by pressure merely, and the pegs may likewise be forced into smaller holes. As the awl and peg-driver are to advance in regular order at fixed distances apart, it has been usual to place both in one stock, and drive both together. This plan is found defective, in that it is difficult to prevent overdriving of the pegs, especially when the awl is penetrating places in the leather which are softer than in others, since an amount of power must be applied which will overcome the resistance in the hardest places. By my improvements the awl is driven by a positive force derived from cam action, while the peg-driver is actuated by the sudden recoil of a suitable spring. By my improvements, also, the action ofthis spring is so governed at or as it approaches the end of its stroke, that its force can be arrested just as it shall be found to be required, and, therefore, the pegs are never driven beneath the surface of the sole. The awl and pegdriver are secured to separate pieces of metal or stocks, fitted to have vertical motion, which stocks are both attached to a slide havinglateral motion, or a motion at right angles'to the motion of the stocks. The awl is shown at a in the several figures, secured to a verticallymoving plate, b, byits stock b, which has a slot in it where the screw enters for adjusting the distance of the awl from the pegdriver, which latter is placed at the distance of one peghole from the former, and which distance can thus be varied for coarse or fine pegging. The piece l) is a flat plate with beveled edges to fit it to move in a dovetail groove in the laterallymoving piece c, as shown in Figures l, 2, and 3 The laterally-moving slide c plays upon afiXed guide, E, secured permanently to the table or frame, and is held in place by dovetail grooves in the manner described for b, and as seen in Fig. 7. The peg driver (shown at f) is a small bar or punch, of steel or other suitable metal, fixed in the end of a stock, by which it is raised and driven upon the pegs. The stock is shown at g, being a bar fitted to lie in a groove onthe inside of the plate b. At g is a projection or toe, Figs. 2, 3, and 6, by which the stock g is lifted by the action of the cam i. The driver is lifted against the force of a strong spring, h, which causes the peg to be driven into the sole as soon as the driver is permitted to descend by the disengagement of the toe from the cam. The descent of the peg-driver is controlled by a retarder, so attached as to effect a regulating of the force of the spring toward the end of the downward motion of the peg-driver, whereby its action on the peg is caused to cease at the precise moment the head of the latter is flush with the surface of the sole. The retarder consists of a dash-pot or cushioning-chamber, into which falls a plunger, (attached to the peg-drivers shank.) rlhe dash-pot is seen at 7c and the plunger at 7c in the several gures. The parts are put in motion by a series of cams fitted to one end of the shaft A. The slide-plate b, to which the awl is attached, is made to play vertically by means of a crank, the pin m of which enters a cross-slot, m', (shown in dotted lines in Figs. 2 and 6.) The piece c is caused to move back and forth upon its horizontal slide by the cam n. (Seen in Fig. 4, and shown as if the slide-plate b were removed.) This cam n, acting upon a projecting pin or plate, l, screwed to the slide, drives the piece c only in one direction. It is caused to return by the force of arecoil-spring, (seen at c', Fig. l.) The pegwood is fed along in a channel, o, Figs. 1, 2, and 5, by means of a roughened roller, p, having ratchetteeth cut on its upper edge, into which a pawl, p', operates, Figs. l and 2. The vibratory motion to this pawl is given by a lever made to operate at the right time by a pin, q, Fig. 2, in the piece b, which plays in ar crooked slot, q', in said lever.

The operation is as follows: The boot or shoe, as the case may be, is supported upon a last supported upon a post hinged to the iloor; or the last may be held in any other Way which will permit it to be carried along in the proper direction by the feed. The position of the shoe is shown at B. The edge of the sole is to be kept pressed up against a guide-plate, so that the pegs may be driven inat the same distance from the edge all round said sole. Startin g from the toe, and a strip of peg-wood being fed into the channel o, revolution is given'to the driving-shaft A. The plate or verticallymoving slide b descends and causes the awl a to perforate the sole, at the same time a cut ter attached to b (shown at s, Figs. 2 and 6) cuts oil' a peg. The cam n now arrives at the stud l, Fig. 4, and causes the slide c to move in the direction of the arr ow. This carries b along while the awl is in the leather, and thus gives the feed by moving the sole with it, as seen in Fig. 2. The pin m next lifts b, so that the awl clears the sole, and the cam n then passing the stud l, the spring c' forces the slide c back to the place of starting, the sole of the shoe being held meanwhile in a fixed position by means of a roughened-surface stud, ,which presses down upon the sole, as seen at t, Figs. 2 and 6. By this means the peg-driver is advanced directly over the hole made bythe awl, and the peg-wood being also carried along with its channel its inner end will stand directly over said hole. While in this position, the toe z' will have arrived at the pin g on the stock of the peg-driver g, and will cause the latter to be lifted to a certain distance. As soon as disengaged, the spring h will act to force down the stock g, giving the effect of a sudden blow to the pegdriver, which accordingly falls upon the head of the peg standing immediately beneath, and thus drives it through a hole in the bottom of the feed-channel into the sole beneath. The retarder now comes into play. The plunger 7c', dropping into the dash-pot k as the peg-driver descends, cushions upon the air beneath, and thus arrests the force of the blow toward the end of its stroke. To regulate this part with nicety, an escape-hole is placed near the bottom of the dash-pot, as seen at u, Figs. 1 and 7, with a screw-stop to cover it, so that by screwing out or in this stop the escape of air regulated, and thus the velocity of the descent of the peg-driver is controlled.

I claim- 1. The arrangement of the peg-driver and the awl Within the slides b c, so that While they are capable of moving vertically indcpendently of each other, they shall have a lateral motion in unison, in the manner substantially as described.

2. The employment, in combination with the peg-driver, ofthe retarder to control the force of the descent of said driver, substantially as described.

3. The arrangement of the vertically and laterally moving slide-plates, in combination with the cams, so placed as to operate upon said plates from Within or between said plates, substantially in the manner described herein.

1n testimony whereof I have hereunto subscribed my name.

WILLIAM Gr. BUDLONG.

Witnesses:

J. P. PIRssoN, S. H. MAYNARD.

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