US1537747A - Last - Google Patents

Description

May 12, 1925. V

G. CLAUSING LAST Filed March 7, 1925 11v VEN TOR A TTORNEJLSC Patented May 12, 1925.

UNITED STATES PATENT OFFICE.

GEORGE OLA-USING, OF'PORTSMOU'IH, OHIO, ASS-IGNOR TO' THE VULCAN LAST COM- PANY, OF PORTSMOUTH, OHIO, A. CORPORATION OF OHIO.

LAST.

Application filed March 7, 1923. Serial No. 623,322.

to lasts comprising a toe part and a heel part which are attached to each other in such a manner that the two parts of the last may be given a relative movement to shorten or to extend the last as the case may be, an

15 object of the invention being the provision of a last of this type wherein lost motion or wobble of the last parts when extended is prevented.

In a last of the divided type it is usual to divide the block from which the last is made into two parts by a saw cut to form a socket in one part of the last and a knuckle on the other portion thereby providing a bearing about which the last parts move when the last parts are being changed from an extended position to a shortened position and vice versa. In order that the last parts may be held against separation it is usual to connectthem together by a link attached to the two last parts by pins or other suitable means (in the present construction spring pins are used), this link lying within a longitudinally extending groove or slot with which the last parts are provided.

It has been found in practice with lasts of this type that there is more or less side play or lost motion between "the two parts of the 'last when the last is extended although the last partsare held against septance between thespring pins by which the link is attached to the two last parts of the last being slightly greater than the distance between the holes in the ends of the link which receive these pins to form a draw in holding the two parts firmly together.

In the accompanying drawings a last embodying my improved construction has been illustrated,-

Fig. 1 being a part sectional elevational View of the same;

Fig. 2 a section on the line 2-2 of Fig. 1; and

Fig. 3 a section on the line 3-3 of Fig. 2.

Referring to the drawings in detail,-1

aration under more or less tension, the disand 2 designate respectively, the fore part and heel part of a last embodying my improved construction, the two parts of the last being divided along the lines 3 and 4 to form a knuckle 5 and socket 6 providing a hearing about which the two parts of the last are moved as the last is extended or collapsed.

The last parts are connected by,,a link 7 extending longitudinally of the last parts and lying. in a groove orslot 8 in the two parts of the last, one end of thelink being connected to the toe part by a spring pin 9 and the other end being connected to the heel part by a spring pin 10. These pins as is customary, are so located that a line drawn through their centers falls below the center of the knuckle 5 when the last is extended and abovethis point when the last is 001- lapsed. I The link in the present case comprises two metal members 11 and 12 lying side-by-side or it may be any suitable link so shaped to fill the slot, the face of these members next the walls of the slot or groove 8 being bulged as indicated at 13 and 14 so as to fill the groove or slot transversely of the last while the two ends of thesemembers are contracted so as to permit the resilient pins 9 and 10 to yield in the operation of the last.

It will be seen, therefore, that this con-- struction provides a last structure wherein relative side motion of the last parts is effectively prevented by the particular form of link employed, whether two-piece, solid, or tube; with flattened ends, this link as above pdinted out filling the groove 8 which receives the link without sacrificing the resiliency of the pins 9 and 10.

I claim: I

1. In a last, the combination 'of a fore part and a heel part each of which is provided with a longitudinally extending groove, a rigid link for attaching the last parts to each other to prevent their separation and comprising two plates lying side by side, spring pins passing through said plates for attaching the rigid link to the last parts,

said plates intermediate said pins being of increased erossfsection relatively to the remaining portions of the plates, to substantially fill the said longitudinally extending grooves in the toe and heel parts of the last.

2. In a last, the combination of a fore part and a heel part each provided with a longitudinally extending groove, a rigid link for beyond the point of attachment of the plates attaching the lastparts to each other, spring to the pins, to substantially fill the said 10 pins passing through the ends of said link longitudinal grooves in the last parts, said for attaching the link to the last parts, said plates engaging the walls of said grooves for link comprising two plates lying side by substantially their entire length.

side and in contact with each other through- This specification signed this 1 day of out their length, that portion of said plates March, 1923. 1

between said pins extending transversely GEORGE CLAUSING.

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