US171810A - Improvement in lasting-machines - Google Patents

Description

` UNITEDl STATES PATENT CFT-Ionc FREDERIC S. HUNT, OF LYNN, MASSACHUSETTS.

IMPROVEMENT IN LASTlNG-MACHINES.

Specication forming part of Letters Patent No. 171,810, dated January 4, 1876 application liled l December 21, 1875.

To all whom t may concern:

Be it known that I, FREDERIC S. HUNT, of Lynn, Massachusetts, have invented certain Improvements in Machines for Lasting Bootsv and Shoes, of `which the following is a specilication:

The purpose of this machine is to supersede hand labor in the lasting of boots and shoes, not by stretching the entire upper over the boot, as is customary in most lasting machinery, but by stretching such upper at one point at a time only, practically as is now accomplished by hand labor; a second object of this machine being to tack the upper to the last at the point where, and the time when, the said upper is stretched.

To this end I employ, first, a last-supporting jack, mounted upon the top of an adjustable post, and adapted to carry a last, over which the upper is to be stretched and tacked or lasted 5 secondly, of a vibratory or swing ing beam or carriage, carrying at top a head, which is provided with an elastic adhesive pad or cushion, and so disposed with respect Vto the lasting-jack, or the gage or stop which determines the position of such jack, that, with each forward swinging motion of the beam and head, the pad wipes against the upper at one point and stretches it over the edge of the last; thirdly, in the combination, withthe swinging beam and its head, of a reciprocating bolt or tack-driver, operated by suitable mechanism, in such manner that, as the stretchingghead ot' the machine reaches its extreme outward position, the driver descends and drives the tack through the upper and into the last.

The drawing accompanying this specification represents, in'Figure 1, a side elevation of my machine. Fig. 2 is an eleval ion of the upper part of the same from the other side. Fig. 3 is-a rear elevation. Fig. 4 is a front eleva* tion of the upper part of the machine.- Fig. 5 is a perspective view of the cam which controls the barv that operates the hammer-lever.

In these drawings, A A' represent two upright housings or standards, erected upon a suitable base, B, united by crossbars C D, and at the top by a cross-beam, E. The last-supporting jack is shown at F as mounted upon the upper end of an upright swinging rod orA bar, G, which is stepped at bottom in a pedal,`

H, suitably pivoted to the-lower cross-bar U of the machine-frame, while the last is shown at I as applied to the jack, the construction of;

-such jack being similar to many now in use,

and being retained in an upright position when not in use by a chain attached to it and the machine-frame.

The upper which isto be lasted is placed l about the last I, and the adjustable or varia# ble support of the jack enables the positionv of the last and upper to be varied at pleasure 5 but, as it isr desirable that a uniform height of the bottom of the last with respect to the stretching-head shall be maintained, I atlix to the front of the cross-beam E a gage or stop composed ot' a l'urcated or. channeled abutment, U. The horizontal horns a a of the latter, which determine the height ot' thel last, overhang the said last, and permit. the

stretchinghead to pass between them in the. act ofturningand rubbing thev edge ot' the upper over upon the last.

The stretching-head before alluded te is shown at J as a rectangular block mounted horizontally upon the upper end of a swinging or vibratory beam, K, erected upon a horilzontal rock-shaft, L, which is journaled within the standards A A at the front. of the latter, and at about midway of their height; the

lower front edge of the head J being covered down upon the last.

To effect the requisite vibratory motion of the beam K and head J, I connect 011e of the journals of the rock-shaft L, outside ofthe standard A', to one end of a crank, N, to the opposite end or wrist-pin c ot' which I pivot one end of a pitinan, 0, the opposite end of such pitman being, in turn, pivoted to the wrist-pin d l of `a crank-wheel, P, which is mounted upon the journal ofahorizontal conn- `tershaft,`1, such shaft being mounted in` t the shank c2 of the head and the upper part of the bar K in a tubular sleeve, d2, and applying a spring, d3, in a suitable manner to draw the, head down 5 and Inext ax to one endof the shaft R a crank or crank-wheel,e1, to the wrist-pin of, which I pivotone end of a ,pitman, e2, the opposite end of such pitman being, in turn, pivoted to the lower end of an arm or crank, f2, whose upper end is afxedY to the i outer extremity of a horizontal rockshaft, g2, while to the inner end of such shaft I aix therear end of a crank, h2, to the front end of which crank I pivot the lower end of an upright rodor bar, t2, whose upper end is forked, and embraces a lateral stud, k2, projecting from the side of thel head J; the arrangement of the sleeve d2, crank e1,f2,.and h2, and rods e2 and 2 being such that each rotation of the shaft R produces a rocking of the shaft g2, and such rocking'of thelatter shaft is transmitted to the head J to raise the latter from olf the last or the upper upon it,` the mechanism being so timed that the rod or bar i lifts the head at the moment the latterreaches its extreme forward position, and immediately prior'to its return.

I propose to combine with this machine a` device for tacking the upper to the last simultaneously with the turning over of the Vupper upon the latter; and to this end I employ a vertical bolt, l2, which plays within an orifice in the front of the head J, and to and fro thereof with respect to the last jack below; this bolt being depressed by a'. proper spring, and actuated by a lever, m2, which is fnlcrumed to the top of said head by` a pivot, n2, and engages` the bolt, as shown in the drawings, the rear end of the handle o2 of this lever being operated in such manner that, as the head moves forward, the `bolt is held at its highest point, and restrained from falling until such head has completed `its forward movement and stroked the edge of the upper of the boot over upon the last, when the handler? is released, and the bolt immediate-` ly descends and drives the tack.` i V To actuate the hammer-lever I employ an upright oscillating bar, p2, pivoted atpa to the inside of the frame, and arranged to vibrate to and'from the Stroker J. It is provided `at its upper end with a stud or projecting pin, g2, which wipes or operates at proper times the hammer-lever. The bar p2 isoperated by a double wedge or cam, r2, attached tothe side yielding pressure on thework.

of` bar K, said cam` being depressibleybnt normally upheld byfa spring, r1. `Opposite the cam, on the bar p2, is a pin, r3, adapted to lopera-te in conjunction with thecam, in such manner that when the head J moves forward the pin r3 will4 ride over the inclined top ot' the cam, and the bar p2, by its spring p4, will be held toward the head J, with its pin q2 in position to wipe over and depress the part o2 of the hammerlever. i This continues until the stroking-head J reaches its forward position, and has pushed forward, stretched, and

folded the upper over `the last, at 'which time the hammer-lever clears the pin, and the hamj mer or boltl2 descends and drives the tack.

. When the head J movesback, the cam rf (depressed during the forward movement by the overriding pin r3, but now released and returned `to its normal position) wipes, with its side incline, against the pin r3, andso forces back the bar p2 far enough to cause the upper pin g2 to clear the hammer-lever.` i

I propose adding to my machine a deviceA for feeding and presenting the tacks to the action of the driving bolt `orihammer; but

the combination of a tack feeding and driv` ing device with my system `of llasting will be the subject of a separateapplicationfor at patent.

The movementand action lof the strokinghead are designed to imitate, as far as possible, hand-work. i 4

l'lhe head has a wiping or 'stroking action,

which tendsto properly draw and stretch the leather-a result which is furthered by makin g .the acting face of the head of rubber or other material that will take hold of the leather.

As soon as the head has `performed its work and the tack has beendriven, the head is `then raised by the lifting-bar far enough to' clear the leather, and is then retracted.

The imode of connecting the head with its stock also enables me to exert a powerful but I am aware that, in j machineryl for lasting boots and shoes, a horizontally-moving slide has been employed to fold over the edge of the leather into position to receive the tack or `nail.- I am also aware `that a nail driving mech# anism has been combined with such a slide.1A

Iclaim neither of"these'features.` i i i `Having described my invention, what claim, and desire to secure byLettersvBat# ent,is-.` i i i 1. In a machine for lasting bootsandshoes;

the combination, substantially as shown and described, with a jack movable-inrequired directions, of a vibratory strokinglhead,1 which moves to and from the work in the arc of a circle, at the timesand iintthemanner stated.`

2. Thevibrating strokinghead, providedfon its acting face with rubber or analogousmaterial, in combination with the jack i or i work-` support, said lparts beingi for operationlas shown and `set forth. 7 i t i 1 vf 3. The combinationfwith an adjustable jack or worksupport, of a stroking-head having driving mechanism and jack or work-support, an up-and-down and to-and-fro movement, substantially as set forth. substantially as shown and set forth.

4. The stroking-head, vibrating upon an FREDERIC S. HUNT. axis, so as to move to and from the Work in Witnesses: i the are of a circle, as herein shown and de- C. M. HINCKLEY,

scribed, in combination with the tack or nail W. E. BOARDMAN.

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