APPLICATION FILED FEB. I8. 1914. 1,1 34,505. Patented Apr. 6, 1915.l
GEORGE E. BELCI-IER, OF STOUGHTCN, MASSACHUSETTS.
Specification of Letters Patent.
Application filed February 18, 1914. Serial No. 819,312.
To all whom it may concern:
Be it known that l, GEORGE E. BELGHER, a citizen of the United States, residing at Stoughton, county of Norfolk, Commonwealth of Massachusetts, have invented certain new and useful Tmprovements in Lasts, of which the following is a specification.
This invention relates to transversely d1- vided lasts and particularly to a two-part last in which the last parts move on each other with a bearing formed by a dividing cut.
ln the various shoe operations, the last is subjected to excessive pressure, which not only tends to split the last at the spindle socket but frequently breaks down the last at the union. lt is to prevent this latter condition, that my present invention is particularly designed. As is well known a very considerable amount of this breaking down pressure is received by the pivot pin of the last union. Any slackness or play here, even the slightest, is therefore liable to destroy the predetermined adjustment of the last, by reason of the wood wearing away under the friction developed by the play of the parts of the union. YWhen it is considered that the ordinary pivot pin is merely inserted through the hole at the link end and that neither pin nor hole are very accurately aged for diameter it will be seen that oonsiderable latitude for play is aorded at this point. This play is usually bothvertical and lateral with its most pronounced tendency toward the lateral. The usual link simply works in a vertical kerf in the wood and has no lateral bearing. The usual pin simply passes through the hole in the link end and obviously can not assist, since the pin does not bear against the sides of the link. Tt has been proposed to use a pin of' larger diameter to more nearly fit the hole in the link end. rIhis expedient is open to the objection that it necessitates increasing the diameter of the hole in the link end and thereby weakens the link. Moreover the pin of larger diameter affords no more lateral bearing than does one of smaller size. This in hole is used furthermore as a bearing on which the last turns on the jig in sawing the last. The small hole necessitated the use of a small jig pin with a constant tendency to accident or mistake. The larger bearing not only increases the strength of the jig but makes it more accurate against possible eccentricities. To the end therefore of providing a form of last union in which allplay will be obviated, T have devised my present invention. Tn it l use a novel form of pivot for the link which not only provides an enlarged bearing for the link end, but lits tightly against the sides of the link to prevent lateral play without interfering with the swinging motions of the link.
T he construction and operation of my invention will be more fully disclosed in the specication which follows and in the drawings forming a part of that specification I have shown as an illustrative embodiment constructions which not only clearly illustrate the principles involved, but are in themselves forms proven satisfactory in practice'and well adapted to the requirements of manufacture.
Throughout specification and drawings like reference numerals are correspondingly applied and in these drawings:
Figure l is a central longitudinal section through a last in accordance with my invention. Fig. 2 is a longitudinal section on the line 2 2 of Fig. l. Fig. 3 is a transverse section on the line 3 3 of Fig. l. Fig. 4 is a detail of the link and pivot therefor and Fig. 5 is a partial section showing a slightly modified construction.
l have indicated at l and 2 the fore and heel parts respectively of a divided last in which the last parts move on each other with a bearing formed by a curved dividing cut. The fore part l has a vertical kerf 8 and the heel part 2 a longitudinal bore l extending partially back toward the rear face of the heel part. The last union in the form shown consists of a link 5 which seats in the bore 4: at its rear end and is pinned in the heel part by a transverse pin 6. The link at its forward end is received and works in the kerf 3. fet this end it has a transverse hole 7 let therethrough to receive the shank 8 of the pivot pin. The metal of the link on each side of the hole is cleared away as indicated at 20 and 21, Fig. l. This enables the enlarged integral head l0 at one end of the shank and the 'enlarged detachable bearing sleeve 9 at the other end tocome up tightly against the link end, and provide ay lateral bearing effective to prevent play of the link. The head l0 and sleeve 9 are of substantially the same diameter and closely ll the transverse bore 13 of the toe part. This pro- Patented Apr. 6, 1915.
vides an enlarged bearing for the link without necessitating drilling the hole 7 of more than ordinary diameterwhich would be vthe y casewere a pin of the desired bearing used.
`The possibilities of diameter of the hole 7` are limited to the diameter of the link itself andif Vthe hole is made too large itis apparent that the link will be unduly weakened. Y In assembling the shank of the pivot pin is inserted throughthe hole 7 in the forward end of the link until the shoulder forme-d by the head 10 seats tightly against the link in the cutout 20. The sleeve 9 is next slid onv to the projecting'end of the'shank until its inner end abuts the opposite face of the link Y pended claims. y
What I therefore claim and desire to se' "e at the cutout 21. .l/Jhen soV set up the shank projects slightly beyond the outer end of the sleeve. This projectingend is then upsetas indicated'at 14;, Fig. 3. This locks the pin in place. 7'.,
In Fig. 5I have shown as aV slightly modified construction two set screws 15 engaging the'link'on opposite sides. The screws each oure by Letters Patent is z- 1.y Ina divided last comprising last parts and a union pivotally connecting said parts, Yand a pivot for said union comprising enlarged lateral bearings embedded in .the body of the last and an intermediate-union vsupporting portion,said intermediate por-- tion having a removable lit in one ofsa1d` enlarged. bearings.
2. In a Vdivided last, a link havingV a` hole let therethrough .near one end and having the Vmaterial at each end of said hole cleared away, a transversepin vlodged in "one of the llastparts and extending through said hole in the link land an enlarged bearing on, said pin-arranged to be brought up close against both sides of said link at said cleared vends of the hole therethrough, a part of said en- Y Copies ot this patent may be obtained for larged bearing having a removable it on t saidrpin. 2 Y 3. In a divided last, a pivotal connection comprising a link, a transverse pinlodged f in one of the lastv parts and extending through a Vhole in the link, a head integral f with said pin at one end and providing an enlarged bearing for said link atjone side, and a slidable sleeve on said pinrat its opposite end and providing anenlarged bearing for said link at the otherend.
4.' In a divided last comprising last parts and a union pivotally connecting said parts, a transversefpin lodged'in onek of the'last parts and extending through a hole' in the union and a fixed and a movable member onv` said pin affording enlarged lateralVv bearing Y for said union on both sides of said hole.
In a divided last comprisinglast-.parts and a union pivotally .connecting said parts,
a transverse pin'lodged Vin one of the last parts and extending'through a liole inthe' union, a head integral with'said pin atlone end and providingk an enlarged bearingY for said union at one side, anda sleeve, on said pin on its oppositeend .and'providing an enlarged bearing forsaid union at Vthe'other end, said lhead and sleeve being of'lsubstan-' tially the same diameter.
6. In a divided last comprising last partsV and a union pivotally connecting said parts,
a pivot for said union in ione of said kparts comprising a union supporting portion, and a iixed and a movable portion associated with said unionV supporting portion and providing enlargedlateralbearing'on both sides of saidV union. 77 f 7 In a divided last comprising last parts and a union vpivotally lconnecting said parts,
a pivot' for said union in one of said partsA comprising a unionsupporting portion, and
a fixed and a movable portion associated with Y said union supporting portion and provid` V ing enlarged lateral bearing on both sides of said union, said movable kportion receiving said linksupporting portion. f
In testimony whereof I aifix' my signature 1 in presence of two witnesses.
GEORGE nBiaLcHER] y ViYVitnesses: Y
S. A. UPHM, I RALPH P. Rovii.
tive cents each, by addressing .the Commissioner of Patents, v
Washington, D. C. f Y