US1536154A - Last - Google Patents

Description

May 5, i925. 1,53`6Il54 c. M. sEARL LAST original Filed April 2l. 1924 Y l/ FMl. Il

ATTORNEYS.

Patented May 5, 1925.

11151111511) STATES s y 1,536,154 PATENTN ottica,

' CLINTON M. siriana, or PORTSMOUTH; OHIO, Assieiioa To THE vULcAN Laer cora PATTY, or PORTSMOUTH; OHIO, A CORPORATION or OHIO.

LAST.

-Oi-igmaieppiicatioii sieaaprii 21.1924, seriai No. 707.796. Divided ananas application. fiieanovefnber i type of last which is dividedY into two parts,I

aItoIe part and a heel part, movable rela tivelyV to .each other to collapsed and extendedpositionsI The present, application ils Il I is a division'of my application filed April I i 2l, 1924, Serial No. 707,796. I

lt. is desirable in lasts of' this type that thelast `be capable .O'E being easily collapsed y so that it may be rem-Oved from a shoe withyout injury tothe lining of the shoe and 'without stretcliingtlie shoe outlof` place.I

In lasting: ashoe the last is `held upside .dovvnf-that is, with the solefside uppermostf-andinasmuch asa great deal of pres sure is puton ythe toe of the last during the `lasting operation, `this tends to collapse the last, andconsequently one o'tythe objectsof 30 my invention is the provision of a construction. iniwhich the `last `is capablebf withstanding the stresses to which it is subjected during the lasting operation Without collapsing," but may Ibe readily collapsedby the operator when desired. y f I y Inone form otlast now in extensive use, `theiiore part and heel part areIat-tached to eachother by a link attached to the fore `part `andlieel part bypins so located relatively that a line drawn through their centers will `iallabove the` axison which the 4*last parts move when theIlast is collapsed and belowthis point` or axis when the last is extended.I .I y ,I In such a construction, the greater I- the distance the pins arebelovvthe axis of the last whentlie last is extended, or the greater the distance they are above the axis `ot the last Iwhen the last is collapsed, the more resistance the last will offer to collapse or extension, but this Idistance is limited inas- `much as thepins mustbe located'in the last body itself, and in the case of wooden lasts `the pinsmust be kept at an appreciable dis- It is one of the especial 24, 1924. serial No. 751,761.

tance from the bottom or sole tace owing to the danger of `splitting the last when the saine is in use or when being moved from extended position to collapsedposition or viceversa. y y f VIn the present construction have pro-` vided an arrangement for attaching the two last parts to each other whereby an effect is ing `oit the pins in the above-outlined confI structioiitothe danger point, the resistanceI to collapse or extension offered by my last being very materially increased, without,

at a point where they are likely to-.cause the last to split.. .y II objects of my invention'to provide a last in which the lastl `obtained which is as eiiicient vas thelowervi howevery neressitating placingof any pins V partsare held together lunder tension` and 1 not' simply held in expanded or collapsedpoi i I 15 I sition .under tension. I I

, It is a further` object of my invention to hold the last parts together by means ein.- ployiiig A a leve1', with the parts Iconstantly under tension. I I

I It is a still further object of invention to hold Athe partsof the lastItogethe'r under tension with the parts so arrangedv that the tension'will assume its maximum Vwhen the parts are either in their yfullyexpanded oi' .fully collapsed position.

It is an additional object ofiny invention to provide the holdingtogether oi the parts under tension and to associate therewith a tension will "achieve its maximum at the of the last parts. ltvvill be realized that the tension `maybe created by a variety of I meanswhich may be' very con'ipressible or .expaiid'ible, and that the details of creating this condition are not essential. I l

lt is a ,furtheriobject ot my invention Ato l provide` such mechanism ,to hold the parts of the last together under tension thatIitI will not be necessary Ito have resilient links or resilient anchor pins. `Such means are eliminated and the same results. are obtained. 'Y i It is a further ob]ect or' my inventionv to provide the holding of such parts together IunderY tension and the increasing of this tension at. extreme V)ositions together with means to lock, the parte iiiex-tended position'I by such tension means to resist the pressure, tending to collapse the last imposed on the bottom ot' the toe member in constructing the shoe thereon until such tension means is overcome by the operator breaking the last.

In the accompanying' drawings Fig. 1 is a sectional view showing one embodiment of my invention;

Fig. 2 is a similar view of another ein-- bodiment.

Referring to the drawings, in Fig. 1, I provide a last comprising a heel part 1 and a toe part 2, -divided by an arcuate -cut 3. i designates a center or bearing pin about which the last parts move when being extended or collapsed, as the case may be, this pin being located at the center of the cut 3. Fastened by this pin is a triangular shaped plate 5, one extremity ot' the base of which is secured by the pin 4 while the other extremity ot the base is secured to the heel part 1 ot the last bythe pin G. The apex of the triangular plate 5 is pivotally attached by a pin 7 to the heel 0r rear end of a link` 8. The forward yend of this link extends into the toe part ot the last where it 'is pivotally attached by a pin 9 to a triangular shaped plate 10. The forward extremity oit this plate is pivoted by apin 11 to the toe part oi' the last. Extending longitudinally of the last is a tube 12, slotted at 13 to receive the plate 10, the tube extending from the pin 11 to the pin f1. Iithin the tube is a spring 14 always 4under compression between the pin il and a ball 15 within the tube and which engages one side 1t of the plate 10. This side or edge of the plate is in the form of a cam.

lith the parts in extended position, as indicated in full lines, the spring 14, which is under compression, tends to rotate 'the plate 10 about the body pin 11 to move the lever 8 tov the left, as viewed in the draw ing, to in turn rotate the plate 5 about the center or bearing pin 1. This carries the pin 6 downwardly in a direction to slierten the distance between the pins and 1l to hold the last in extended psition `under tension. The cam on the plate 10 acts as a lock. W'hen the last is collapsed, the spring 14 tends to actuate the pin 6 in the oppositie direction to again shorten the distance between the pins 6 and 11, and hence hold the last parts in collapsed position under tension.

In Fig. 2, 17 designates the heel part and 1S the toe part of a last divided by an arcuate cut 19, these two last parts moving or pivoting from extended position to collapsed position, and vice versa, about a bearing pin 20. Secured to the heel part by the pin 2() is a triangular shaped plate 21, one extremity oi? the base of this plate being attached to said heel part by a pin 22. The other extremity ot this plate is pivotally attached by a pin Q3 to a link 24;. This link extends into the toe part ot the -l-ast, where it is pivot-ed at 25 to the Ait'orw-ard extremity et the base of a second plate 26 pivoted to the toe part of the last by a pin 27. This last is provided with a longitudinally extending tube 2S, within which VI mount a spring 29, this spring being held under compression between the bearing pin 2O and a ball 3() which engages the lface 31 ot plate E26 when the last is extended rand the lace 32 when the last is collapsed.

In this embodiment of my invention, when the parts are in extended position, vthe action -ot' the spring` 29 on th-e face 31 ol the plate 26 tends to swing the pin 22 in a direction to shorten the ldistance between this pin and the pin 27, thereby holding the last in extended position under tension. Likewise when the last parts are collapse-d, these two `pins are being forced toward each other to hold the last collapsed under tension.

It will be apparent that I have provided a last structure wherein the last parts vare held in extended position and in collapsed position under tension, thereby Jroviding a structure which will successtu ly withstand accidental collapse or extension et the last parts when the same are in use in the manufacture of shoes. It will be seen also that in my invention I provide a structure in which the force exerted on lthe last parts to hold the. last in extended and in collapsed position is fol some magnitude, my improved construction being such, however, that this increase in torce is provided without weakening t'he last. In other words, more power is `available for holding the last parts in adjusted position due to my improved structure than is possible in lasts as now manufactured.

It willbe 'seen also that I have provided a last structure wherein the last parts are held in extended position and in collapsed position 'under greatest tension- In other words, the tension under which the last parts are held to each other when the last is yextended or when the last is collapsed, as the case may be, greater than the tension under which the last parts 'are held when in an intermediate position. y

Having thus fully described my invention, what I claim 'as new and desire to secure by Letters Patent is 1. In a last ofthe divided type and coniprising a heel part and a toe part, a bearing pin tor said last parts, a triangular shaped plate having one extremity secured on said bearing pin, another extremity secured to said heel part, a bearing pin in the toe part, a tube within the heel part and toe part and mounted on said bearing pins, a substantially triangular shaped plate pivoted about said bearing pin in the toe parta link having one end pivotally connected to said plate in the heel part and its other end pivotally connected to the plate in the toe part, and a spring within said tube for rotating the plate within the toe part about the bearing pin in said toe `part to thereby maintain the heel part and toe part in extended position and in ool` lapsed position under tension.

2. In a last of the divided type, the coinbination of a heel part and a'toe part, a triangular plate having the forward `extremity of its base secured to the heel part of the last at the axis of the last parts and having the rear extremity of its base secured to the heel part of the last, a link pivotally attached to the apex of said plate and extending into thetoe part of the last, a second triangular plate, the apex of which is attached to said link pivotally and the y forward extremity of the base of which is of the two plates to the respective last parts to thereby maintain the last parts in extended position and in collapsed position under tension. o

In testimony whereof, I affix iny signature.

CLINTON M. sEARL.

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