US1199946A - Last. - Google Patents

Description

0. I. VAN SCHOICK,

LAST. APPLICATION FILED MAYI9. 1915.

Pa tentd Oct.

v \HVEHTII'ORZ- BY I 1 m -3 p Y I To all whom e't may, concern s gns I siren Be it known that I, QRA 1. Vin Sorrows, acitizen of the United States, residing at Pontiac, county ofi Oakland, State of Michigan, have invented a certain. new and useful Improvement in'La'sts, and declare the following to be a full, clear, and exact do 'scription of the same, such as will enable others skilled in the art to which is pertains to make and use the same, reterence beinghad to the accompanying drawings,

which form a part of this specification.

My invention relates to lasts for boots I and shoes of the hinged or jointed type and consists in the arrangements and combinations hereinafter described,

In the drawings, Figure L'represents avertical elevation partly in section oi my,

construction showing the internal arrangements in the closed or used position. -Fig.

2, represents the same structure in the same manner, but in position for withdrawal of the last in the usual manner. Fig. 3, is .a partially longitudin'al, section on the line XX of Fig. 2.

Similar letters refer to similar parts.

In the drawings, A represents the toeportion of the last, B the heel portion. These' are two distinct parts.

C is a joint between the two portions A and B upon which they turn respectively. This joint I prefer to make by means of an inclosed cylindrical stud D, separating the two parts, said stud preferably having an enlarged central portion formed thereon at (Z. The parts A and B are cut out suilioiently to permit the insertion of the stud D and thus prevent vertical displacement when they are held in position as shown in the figures by the means hereinafter stated. It is obvious, however, that other forms of a joint, so-called, may be used,-

as for instance either the part A or part B might be cut out and the parts A and.

Brespectively have a convex curved part to fit the concavity, a manner in which twopart lasts have been heretofore united and therefore need not be further described. All that is necessary is to hold the two parts in fixed relation while they turn upon each other and means to prevent displacement.

Each of the parts A and B has a narrow central groove a, b, in. a semicircular form, as shown in Figs. 1- and 2 and also as shown in Fig. 3. Within this groove'is placed a curved spring 8 which preferably is of an hm bum/4.1mm! vzinmumnunmmly LAST.

' Wmjmem I Specification of Letters Patent.

ver remiss show I in maintaining the shown intention in This spring is held In place and under longitudinal tens,

sio'n by two' pins' E, F, such relation to {the stud or pivot]? that when the last is in the position show Fig. '1, a straightflinedrawnBetween}? err centers will be below the I I I I when the last is open for withdrawal, as;

shown in Fig.2, it I .111 an equivalent manner, sarily henig strained when the intersecting 'lin e passes the center C. The spring lacingv flat and filling the grooves or slots a and'b with a "fairly close fit, it affords means for holding the parts A and B in/arelative position. so that there can be no motion sidewise of said partsupon each other. It therefore acts a guide as well as aspring the correct position; I

The mode of operation of this device is evident from the foregoing description.

itismhvious-that the spring 8 may he made of any reasonable asto produce an .efi'ectual resistance to any accidental force which would tend, to shift the parts from one position to the other. I It is also evident set it would, by means of its engagement of the the two parts A and separation. I What I desire to claim is: 1. In, a: last-of the type described, the" B of the last from combinationof a toe and heel piece arranged 100 to turn respectively/upon. a common pivot, an elliptical spring located in a vertical plane and uniting the two parts of the last,

and means for holding the spring in opcr I ative engagement with each part respec 105'.

I Plttenteilfiet'.3,1918 e r enter-n11n ieeiira ia-ieis. aeratin .sense. I TI the pins being in ee 1 r -fishnet ancrwhen the last 18 open' 'for withdrawal, '6 5 I and F, theconsequenee is that when 7Q I is also held hy'the springl-Z-{i y the spring necesposition of. the parts in desired tension so pins E and, F, hold ranged t0 tum respectivelynpon' a cemmon -p1v0t and havmg vertical slots, 3. .sprmg or". an elliptical shape heated. vertically end uniting the two parts, and means for held- 111g the spnng m epemlz ve engagement 'With each part. respectively, which means is so located with reference to the pivotal turning point that the sprifig is strained in varying th'e geesition of the tweperts from one; liznityef mevement to the other;

3. in last of the type described, the combmatlen of a toe and heel plece arranged to turn z-espectlvely upon,a. common "pivot and having vertical slots, and av spring 15 of an elhptlcal shape located verincally, umtgimme I ing the twdparts, closely engaging in .verbmaLslets' in the toe and heel pieces and forming a guide therefor, a'nd pins so located with reference to the pivotal tern ing point and so eliga ging fihespring that the spring is'strained' in varying; the 790s? 131011 of the parts from one hmlt of move ment to the other.

I In testimony whereof, I sign this specifig when m the presence of two witnesses.

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