US1447232A - Last - Google Patents

Description

Mar. 6, 1923. 1,447,232 I vS. E. BOYNTON Paranas a. e, issa,

iiiiflfilr earner ;naisin STANLEY E. BOENTON, 0F ROCHESTER,VNEVI YORK, ASSIGNOB-TO FITZ-E1IPIRE DOUBLE PIVOT LAST 'COIV {?ANY, GF AUBURN,. IVEAINE, A CORPORATION 0F LAST.

Appiieetion fiea iana-sry as, 1920. serial No. assess;

To all whom it may concern:

Be it known that I, S'rANLnY E. BoYN'roN, a citizen of the United States, residing at locliester, in the county of Monroe and State of New York, have invented certain improvements in Lasts, of which the following description, in connection with the accompanying drawings, is a specifioation, like reference characters on the drawings in-v dicating like parts in the several figures.

This invention relates to hinge lasts, that is, lasts comprisi-ng a forepart and a heel part, together with a bonding or hinge mechanism to these last parts when removing the last from a shoe. This so-called hinge mechanism is frequently not a true hinge, that is, it may not provide for ya strictly Circular 'swing' about a single fixed pivot, but may provide for a relative movement of any type. in the illustrated embodiment of the invention, the.

movement is a compound one about a moving center.

The primary mechanical (as distinguished from geometrical) desiderata in a last hingc` mechanism are simplicity and strength. The last is also frequentlyV desired to have certain positive or impositive locking characteristics, the provision for which generally detracts from the simplicity (and therefore from the reliability and cheapness) of the construction. It is generally desirablethat a last be held in extended position with suffi-v cient rgidty to withstand the operations of machine shoeniaking, and often desirable that it be absolutely rigidly so held and, at least, impositively held in collapsed position, to avoid accidents in handling it or to insure that it will not straighten until it is desired to do so.

It is the object of my invention to provide,

a hinge mechanism for a last which shall be simple, strong and cheap, as well as reliable in operation. An importantV feature of the invention consists in two hinge members which inclependently unite the last parts and co-operate with each other to hold the last in a desired position. In the illustrated last a hingie member has a pin connection with one last part and a pivot and slot connection with the other whereby it may move in the last to co-operate with the other hinge member. This connection is also preferably arranged so that the effective length of the facilitate relatively moving.

which show a preferred lembodimen't ofthe invention selected for'illustrative 'purposes,

and thenl pointed out in' the appended. claims. Fig. l of the drawings' shows the last in extended' position' I Fig., 2 shows the last in collapsed position; The last is divided into a forepart lO anda heel part 12 by a cutof suitable shape. in the last, shown in the diawingithis' cut comprises a'substantially vertical cut 14 beginning in the treadface of the last,' fo`llowed by aforwardly and'upwardlyextending cut 16, extending to the l opening18, and

followed by more or less forwardly'slopingf cuts 20, 22 in the forepart, and a backwardly sloping cutfi24`on 'the heel part. vThe forepart is bored for'two hinge pins 26,28 and the heel part for two more hinge pins ,30, 32. The upper and lower pairs of these pins are connected by links 34, 36, respectiv'elyf The link 34 has a s'lot`38, substantially arcuate about the center of the pin ,26, and

' an Vapertune 40V for the reception vof an 'operating tool, Vas will be described. The link also has a downwardly extending 'projection 42, having front and rear facesv 44 and 46 arranged to (Jo-operate with the rear and front faces 48, 50 r'espectively, of'lan upwardly extending lug 52 on the'link 36, when the last is in collapsed andl extended position, respectively. i

These two positions are illustrated in the two figures of the drawing. The 'combined link. and locking member 34 vismaintained in operative position by a spring54 seating against it abovel the pivot 26,`as shown.

In View of the relation of the slot-38 to the pin 26 the movement 'of thefmember 34 upon the pin. 30y will permit no'looscness in the last. The lock in 'extended'l position is positive, and is broken by lifting the member 34 by means of some suitable tool in engagement withthe hole 40. The angularity of the surfaces 44 and 48 is so adjusted that the lock in'collapsed position is mpositive,

i. e., the lock in collapsed position may be loo under the pressure oi' the spring 5d, the angularity of the suraces ate and 50 in the last illustratedv being so adjusted that the lock, in extended position, is positive and not brealrable by pressure. Either loclr may be made to Work either way by a suitable change in slope oi' the suriaces Ale and 48, or 46 and 50.

ril`he entire hinge and locking mechanism is thus seen to consist of the two link members and single spring only. lt is extremelyY simple and very strong. p

The last is not Weakened by additional cutting in order to accommodate the locking mechanism, as is the case in many lasts or the prior art. All of its mechanism can be placed in a. single keri of minimum Width.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent of the United States is l. A last comprising a iorepart, a heel part, and tWo rigid hinge members 'each joining said parts, said Imembers being constructed and arranged to engage each other' to hold the last in extended position.

2. A last comprising a forepart, a heel part, and tWo rigid links each joining said parts, said links being constructed ano arranged to engage each other to hold the last positively in extended position.

3. A last comprising al torepart, a heel part, and two link members lying one above the other each uniting said parts, said links being constructed and arranged to co-operate with each other to hold the last in collapsed position.

ll. A last comprising a. forepart. 'a heel part, and tivo links lying one above the other and uniting said parts, said links being constructed and arranged to co-operate With each other to hold the last impositively in collapsed position.

5. A last comprising a forepart, a heel part, and two hinge members each uniting said parts, said members being constructed and arranged to co-operate with each other to hold the last. in collapsed position and to hold it positively in extended position.

6. A last comprising a heel part, a. i'ore part, and hinge members joining said parts, one hinge member being constructed and arranged to move in the last independently oi its behavior as a hinge member to eo-operate with the other hinge member to hold the last parts in a desired relative position.

7. A last comprising a heel part, a 'toremiamee part, and hinge members joining said parts, one hinge member being constructed and arranged to move in the last independently of its behavior as a hinge member to wedge against the other hinge member to hold the last parts in a desired relative position.

8. A last comprising a heel part, a forepart and a. hinge link joining said parts, said link having a rotary movement as regai-ds one last part and a combined movement of rotation and translation as regards the other said last part, and a second link j oining said last parts.

9. A last comprising a heel part, a forepart and a hinge link joining said parts. said linlr having a rotary movement regards one last part, and a combined movement of rotation and translation as regards the other .said last part, said link being oonstructed and arranged to form an inextensible connection between said last parts.

10. A last comprising a heel part, a forepart, and two hinge members unit'ng said parts, one of said members having a pin connection with one ot said last parts and a pin and slot connection with the other ot said last parts Whereby it may move into and out oi' co-op ration with said other linlr member to hold the last. parts in position.

ll. A last comprising heel part, 'torepart. tivo hinge members each independently unit-ing said parts and rigid and integral b, lugs on said members constrncted and arranged for interengagernent to hold the last in a` desired position.

12. A last comprising :forepar a heel part, and tWo hinge members unitingr said last parts, one of said members having a simple pivotal connection with one last partV and apin and slot connection with the other said last part, the slot being subs'rntally Circular around the axis of the said s mple pivotal connection, Whereby the said one member may be sivung into eng.,..gem t and disengagement With the other said bingo member to hold the last parts in relative position.

13. A last comprising a torepart and a heel part and hinge i'nembers joining said parts co structedand arranged to hold the last positively in extended position and impositively in collapsed position.

ln testimony ivhoreotl I have signed my name to this specitioation.

STANLEY E. BGYNTON.

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