US872972A - Link-last. - Google Patents

Description

PATEfiTED DEC. 3, 1907.

C. F. PYM.

LINK LAST.

APPLIOAIION FILED JULY11,1907.

liwewfar:

1 likeletters I to that'class of lasts. in

as m a shoe,'and Fig. shortened or collapsed position.

Unrran s reens Parana enric .cnARLEs F; PYM, or ESSEX, olv'mnio, CANADA, ASSIGNOR 'ro assumes-Ammo HINGE LAST COMPANY, or erson, MICHIGAN, A coaronirion or WEST vIseiNIA.

LINK-LAST.

Specification of Letters Patent.

Patentedllbec. 3, 1907.

' To all whom it may concern:

Be it known that I, CHARLES F. Pm, a subject :of the King of Great Britain, and

' resident of Essex, in the, county of Essex and 5 Province of Ontario, Canada, have'invented an Improvement in Link-Lasts,-oi which the following description, in connection with the accompanying drawings, is a specification, on the drawings representing like parts.

My-invention is a divided lastfor. use in connection with boots and shoes, and relates which the forepart by two hinges or unions, covered broadly in the Goding patent, No. 674,084-01 May 14, 1901, my last employing aliuk form of connection, one type of which is shown in the companion Goding patent, No. 674,085.

and heel-part are joined character in which the forepart and heel-part tending from the top obliquely rearward to the bottom, so constructed that it will begin to shorten immediately upon rnovin toward colla sed position, having no ten enoy or possi ility of lengthening any whatever in moving from its fully open or operative position to its closed or collapsedand shortened position, a further object being to provide a construction which permits the heel-part to slidealon the forepart in direct contact therewith if desired, although not necessarily so, and to the above ends, I provide two 35 hinge-plates or articulated unions in the form of pivoted links set one vertically above the other in the last, the pivots of both unions inthe heel-part being preferably at the same distance apart as the pivots in the lorcpart, and lficated higher, or at least as high, in the heel-part as those in the forcpart. In other Words, the pivots are preferably in parallel lanes extending obliquely downward and forward in the last, and the con nccting hinges stand above each other and are intermediately pivoted or articulated between their ends, the latter being pivoted respectively in the opposite parts of the last.

In the drawings, Figures 1 and 2 represent the last in side elevation, the side being broken out or sectioned to show the joint construction more clearly, l lig. lksllmllillgtlle last. inlits lengthened oro'pm'atrvc position, 2 showing the last in its near the rear end of the .20 My object is to provide a last of the above It'will be understood that I have not herein attempted to all its usual trimmings, but have confined my drawing to the invention in hand. The secant line 1 which separates the forepart 2 from the heel-part 3 extends from. a point 4 in the crown. ornpper instep portion of the last downwardly and rearwardly to a' point 5 shank of the last, and While this secant line may be in one or more planes, I prefer to locate an oilset 6 therein slightly'above the middle of the last, so that when the last is in operative position, with the parts extended as in Fig. l, the bottom alinement of the forepart and heel-part will. be controlled mainly by the offset 6, which relieves the hinges of most-pf the strain, this being more p-articular 'tlihcase when the last is used in inverted position, as is customary in the manufacture of shoes. Opposite kerfs or recesses 7, 8 are provided, extending lon itudinally into the opposite last parts, and in these arcrnounted a top show the last provided with pair of links 9, 10, and a bottom pair of links l1, l2, pivotally connected at their inner ends 13, and preferably provided with stops 14, which tend to prevent the pairs of links from getting on a'dead center, the upper pairof links or hinge union being secured at its opposite ends by transverse pins or bolts l5, l6, and the lower pair of links or hinge union being connected by similar transversely extending pins l2, [8. i have shown the links mounting, but it will be understood that the at practically the extreme upward angle ofmounting of the links is not confined to this angle, as the intermediate pivotingof the links so as to make an articulated. bond or uni n makes it absolutely impossible for the heel-part to lengthen in slidin upwardly from its-position Fig. l to,,its.collapsed position Fig. 2, even though thc'rear pivots 16 and 18 were located much lower than as shown, Also, while the preferred and most advantageous construction is that in which the upper pair of allel to the mediate pivoting of the links causes the last to work properly irrespective of whether the pivot pinsare parallel or not.

One of the chief advantages of a second last is to have the heel-part leave the counter-lining instantly upon the very first movemont oi the last in the shoe when it is to be removed therefrom, and on the other hand,

pivot pins are exactly par lower pair of pivot pins, the inter- 1 when the lost is being inserted in eshoe, to

, have the heel-pert epproech and engage the lining at the counter of the shoe horizontally or straight ahead Without any sliding movement on seirl" "ihese results are at tained in e merlreci degree by my invention, inasmuch as the intermedistelypivotecllinks yield automatically to Whatever position the heel-pert may he required to assume in its removal or insertion into n shoe. it the stops 14- are employed, there is never any den or of the hinge connections getting on e (lea center so as to coin el the heel-pert to swing onthe forepert, elt ough if these stops 14 are, hot used there is still very little danger of saidiswinging movement, because the links tend to drop into 9. bent position naturally.

I prefer to employ the stops l and thereby topompellthe links to hreek in opposite directions, as thisfgives greater strength and broo- 1 also refer to locate the linlrs or unions at leost es 1 or sport as they are shown in thejl drawings, as this gives, maximum strength against the twisting or shifting strains whichere reierrecl to more particle 'larly in the Gosling patent No. $74,684:, and

which render it advisable to employ two links or 111110115 (as therein claimed) instead of one. In use, the lost, in its collapsed positron vFig. 2, is inserted in the shoe, and then cli rectly vertical pressure is brought upon the heel-port, which causes it to do end into the heel of the shoe in direct slidi ontect with the forepert, and Without swinging ection. The links yield at their pivots 13, per-- mitting the maintenance of this sliding contact Without compelling the heel-part to" leitve or get out of contact with the fore art. The result is thatthe surface of the 1eclport of the lost engages the lining or inner surface of the heel'psrt of the shoe with 0. direct outward thrust, end substantially With-- out any sliding or downward frictional pres-- sure on said; liningwhetever. This secures an entire absence of any tendency to disturb (in or wrinkle, tear or roughen said lining. the other hand, when the last is to l moved. from the shoe, being then in its 7 two subscribing Witnesses.

tended position the same as shown in Fi 1, and. tightly engaging the inner surface 0 the shoe, ct ell points, the heel-pert is forced'forwe'rci end upward in. "sliding contact along the line 1, the result being that the heebpzirt of the last leaves the lining ofthe heel-part of the shoe almost solely hya, forward movement, and. without any tendency tolscra, e or slide n Word on the lining surface of port 0? the shoe. The arrangement of the relmtermetlietely pivoted links permits this dirent fonvord movement of the heel-pert and the continued maintenance-"oi sliding contact hetween the heel-part and forepart as the last changes froinlengthened position Fig. l to'shortened position Fig. 2, and. vice;

eke no claim 'to the useofthe verse; I 1 link form of connecting union, broadly conentered, as thetiform ,of connectlng device has long been commonly known'inthis art, see for" example Clark patent, No. 534,856,.

endlhitz patent, No. 632,994.

Having described my invention ,jwl1et I claim as new and desire to secnre by Letters Petentis: s y

i. A mngecllost, compmsing e forepart end heetpelrt transversely severed obll uely toward the'hcttoin of the heel-pert, on two ogposite ends in the respective last parts one s ove the other, said unions being on able of flexing in opposite directions as t. e last ports move from. one position to the other.

In testimony whereof, I have signed my memo to this specification,

CHARLES F. PYM.

Witnesses 1 *QTTO l3. BAn'r'nnL,

JLEME T It. STICKNEY. I I

in the presence ol

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