US819970A - Jack-pin for hinged lasts. - Google Patents

Description

PATENTED MAY 8, 1906.

W. B. ARNOLD.

JACK PIN FOR HINGED LASTS.

APPLICATION FILED MAR. 28, 1904.

10227266566. 38711??? M RSW, wz'ZZz'arrLB (Zfnnaid, 9- 7skdmwu UNITED STATES PATENT OFFICE.

WILLIAM B. ARNOLD, OF NORTH ABINGTON, MASSACHUSETTS, AS-

SIGNOR TO KRENTLER ARNOLD HINGE LAST COMPANY, OF

DETROIT, M IUH IGAN.

Specification of Letters Patent.

Patented. May 8, 1906.

Application filed March 28, 1904:. Serial No. 200.496.

To all whom it may concern.-

Be it known that I, WILLIAM B. ARNOLD, a citizen of the United States, and a resident of North Abington, in the Commonwealth of Massachusetts, have invented a Jack-Pin for Hinged Lasts, of which the following description, in connection with the accompanying drawings, is a specification.

Those kinds of hinged lasts which have a swinging movement are liable to buckleor shorten unexpectedly in the shoe, especially when lasting, and even when the hinge of the last is placed high enough to counteract this tendency a careless workman will often bend or shorten the last inadvertently.

My present invention is a ack-spindle or supportingin for preventing the abovementioned 'ability of the last to buckle or bend when in place on a jack having a toerest, and is intended for use with lastlng-machines, such as the Chase laster, or with any jack that has a toe-rest.

Briefly stated, the invention resides in providing means cooperating with the support at the heel end of the last for giving a positive tendency to said heel end to swing bottomward with reference to the fore part of the last as the shoe is being operated upon.

Several expedients are herein shown for accomplishing this result, and I refer to unite them all in one device in whic the pin is pivotally supported to the rear of its projecting portion or pin proper and also has a knob or engaging ortion projecting against the heel end of the last behind the thimble .or socket thereof.

Further constructional details and the operation and advantages of my invention Wlll be pointed out in the course of the following description, reference being had to the accompanying drawings, in which I have illustrated my invention.

Figure 1 of the drawings is a sectional view showlng one form of my invention in use. Fig. 2 is a side elevation of the j ack-pin shown in Fig. 1. Fig. 3 is an end elevatlon thereof, and Fig. 4. is a side elevation of a modified form.

For convenience of illustrationI have omitted the usual details of the lasting machine or jack and have shown only the toe-rest a and post a, the latter being broken away and provided with a threaded lower end a and an adjusting-nut a Bearing in mind that in order to counteract the liability of the last to buckle or shorten unexpectedly, heretofore referred to, it is necessary to give the heel part c of the last a swinging movement or tendency to swing bottomward on its hinge, I provide a jaw-like support or jack-pin b, which automatically grabs or embraces two points of said heel partviz., the back side at the 0 on end of the thimble socket or hole 0 and t e rear end of the cone or narrow top portion of the heel at the rear of said socket. In connection with this j aw-like grabbing means I preferably provide a tendency of the same to tip forward and downward, thereby producing mechanically as nearly as possible a positive swinging impulse to said heel end on 1ts hinge as a pivot. This swinging impulse is to be distinguished from a mere downward or forward movement imparted to the whole last-such, for instance, as that shown in the Winkley patent, No. 573,068, December 15, 1896.

My invention resides in providing means for cooperating with the thimble-socket for giving a positive turning movement to the heel part on its hinge. To this end the pin portion 1) of the jack-pin is smaller than the socket c and is pivoted at 6 close to the last out of vertical alinement with the pin portion 6 and provided at the rear of said pivot 11 with an upwardly-projecting knob 12 shown in Figs. 1 and 2 as having its apex at about the same distance from the pivot as the part b, while in Fig. 4 it is at the extreme rear end of the jack-pin. Also preferably the pin 1) is cut away obliquely at its front side, as shown at b, or it may be tapered or cut away at both sides. as shown in Fig. 4, or at the rear only if not jointed. The reason for beveling the jack-pin b at b is to permit the up er end of said pin to tip or swing laterally 1n the socket c, it being obvious that even when the socket is larger than said pin practically no swinging movement would be IOO gaging pin portion b, or, in other words, the rear engaging side of said pin portion and the top side of the base of the jack-pin diverge at less than a right angle to each other, so that they operate to grasp or pinch at two remote oints the right-angled portion of the lastheel which they embrace, as clearly shown in Fig. 1.

To give steadiness, a headed block a is held by a spring a yieldingly against the bottom of the ack-pin b to maintain the latter in normal position.

In operation when a last is put in position, as shown in Fig. 1, it is obvious that the weight of the last immediately causes the last to slide forward until the rear wall of the socket c engages against the rear side of the part b. The knob 6 acts immediately to tend to raise the rear end of the heel, and as said knob b and the pin portion b are integral or unyieldingly connected the result is that the heel is clamped or grabbed between the ver tical rear side of the pin portion 5 and the projecting knob b which, being free to swing over forward on the pivot b operate to positively and automatically give a bottomward swing or swinging tendency to said heel part. The rear top edge (at the open end) of the socket c presses unremittingly against the rear side of the pin portion I), while the knob b cooperates with the cone of the last and with the pivot 19 to cause the pin portion b to tend to swing forward at its free inner end toward the front wall of the bottom of said socket c. If the last is not in its utmost lengthened position, this swinging movement will actually take place, so that my invention insures that under all circumstances the heel end of the last will be given the desired positive swinging movement or tendency irrespective of whether the toe-rest a happens to be adjusted exactly to the right height or not. Of course if the jack-pin b is not pivoted, but is mounted rigidly on the post a, it is obvious that in order to obtain the positive swinging tendency or movement of the heel end, as above explained, the spindle must be cut away on the rear side, as shown in Fig. 4. Ihis results, as in the previously-described pivoted construction, in compelling the heel part to tend constantly to turn bottomward on its hinge as a pivot.

In Fig. 4 I have shown a jack-pin having the knob or projection 5 still further to the rear of the pin.

It will be understood that while I prefer to employ all the features together, as shown, they may be used to advantage alone and also that many changes, modifications, and supstitutions may be resorted to without departing from the spirit and scope of my invention.

Having now particularly described and ascertained the nature of my invention and in of, having a pin portion and an upwardlyprojecting knob at the rear thereof, said pin portion being adapted to engage firmly against the rear side of the thimble-socket at theouter end of the latter and being shaped to permit a lateral tipping movement within.

said socket with reference to said engaging region as a pivotal center, said knobbeing arched rearwardly to span an appreciable portion of the cone of the last and engage the same solely at the rear end thereof for binding and clamping the intervening portion of the heel part between said knob andthe rear, lowerside of said pin portion.

2. A device of the kind described, comprising a support for the toe of a hinged last, and a jack-pin for the heel end of the last, having a pin portion shaped to tip freely forward in the thimble-socket of the last, said j ack-pin extending rearwardly from the base of said pin portion and having at the rear end of said extension an upwardly-projecting knob, and being pivotally supported adjacent the top of the jack-pinand back of vertical alinement with said pin portion.

3. A device of the kind described, comprising a support, a jack-pin ivoted thereon out of vertical alinement wit its engaging pin, and means tending to maintain and restore said jack-pin normally yieldingly in vertical position.

4. In a device of the kind described, the combination, with a support, of a one-piece jack-pin having an upwardly-projecting engaging pin at its forward end, and terminating at its rear end in an upwardly-projecting knob, said jack-pin being pivoted-close to its upper side between said knob and engaging 5. In a device of the kind described, a jackpin having an engaging pin portion capable of entering and tipping loosely in the spindlesocket of a hinged last, said pin being smaller than said socket and an integral knob proj ecting upwardly from the base of said jackpin to engage the cone of the last at the rear of said spindle-socket.

6. A jackpin, having an upwardly-extending pin portion to enter the spindle-socket of a hinged last, said pin portion being obliquely cut away on one side to permit relative tipping movement of said spindle-socket and pin portion, turning on the rear lower side of the latter as a pivotal .center, and an upwardly-proj ecting knob at the rear of and integral with said ack-pin and pin portion for cooperating with the latter in giving said tipping move- In witness whereof I have signed my name ment to the heel end of the last. to this specification in the presence of two IO 7. A jack-pin, comprisingi a basf: hafyring an Subscribing witnesses.

engaging pin portion eXten ing t ere om at an acute angle to its rearward top surface, WILLIAM ARNOLD and the latter terminating in an engaging Witnesses;

knob, for engaging the rear end of the cone of GEO. H. MAXWELL,

the last back of the spindle-socket. M. I. DELHOMMEAU.

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