US1223206A - Expansible shoe-last. - Google Patents

Description

C. SCHEVITZ.

EXPANSIBLE SHOE LAST.

APPLICATION FILED AUG. I6, |916.

1 ,223,206. Patented Apr. 17, 1917.

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C. SCHEVITZ.

EXPANSIBLE SHOE LAST.

APPLICATION FILED AUG. I6. 191B- 1,223,2G6. y `mami Apr. 17,1917.

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CARL scHnvITz, oraAcxsoNVrLLE, FLORIDA.

' ExPANsiBLE 'SHOE-LAST.

Jacksonville, in the county of Duval andv State of Florida, have invented newand useful Improvements in Expan'sible Shoe- Lasts, of .which the following is' a specifi'- cation.

This invention relates to expansible shoe lasts and has particular application to an improvement of that coveredin my prior Patent No. 1,184,577 patented May 23, 1916. The chief characteristic of this invention is to provide improved means operable from the exterior of theA shoe for adjusting and laterally moving the stretching elements, whereby I eliminate the use of nu# merous pinions thus, reducing the cost of the device to a minimum.

Another characteristic of this invention 'resides in the provision of a device of the above described character having means for so mounting the stretching elements as to permit of a greater' adjustment thereof than that ydisclosed in the above mentioned patent, the said means being slidably mounted and operable exteriorly of the shoe.

Other objects of the invention will appear as the specification is read in connection with the accompanying drawings in which Figure l is a top plan view partly in section, showing the'device constructed in accordance with my invention;

Fig. 2 isy a vertical longitudinal section taken on the line 2-2 of Fig. 1;

Fig. 3 is a transverse section taken on the line 3 3 of Fig. 1;

Fig. 4 is a .vertical transverse section taken on the line 4 4 of Fig. 1;

Fig. 5 is a detailed perspective of the frame.

Referring to the drawings in detail, my invention comprises a frame generally indicated as at A which is elongated and of substantially rectangular formation, and comprises the side bars 1, the forward end bar 2 and the rear end bar 3, the latter being curved in the form of an arc to conform to the contour of the inner heel portion of the shoe. The end bars 2v and 3 are connected by the parallel spaced longitudinally extending bars 4, having shown in this instance two bars which coperate with the side bars 1 to form guideways for the Specification of Letters Patent.

ratenfe'a'npr. 17, 1917.

Application filed August 16, 1916. Serial No. 115,249.

'yokes as will be hereinafter described. The

sidebars 1 and the longitudinally extending bars 4 are each provided withlongitudlnal extendingregistering slots 5, theslots vbeing preferablyarranged at' the medial portion ofthe bars as is 'clearly shown in Fig. 5vof the drawings Mounted between each pair ofbars 1 and 4 are the yokes or frames generally indicated as at B, 'each of which comprise the sidemembers 6 and the end members 7, the side members having'their opposite ends formed with Ilongitudinally extending, extensions 8 which project an appreciable' distance beyond the end members y7 as is clearly shown in Fig. 1 'of the drawings. The yokes B are relatively shorter than the frame A and have the side members 6 provided with laterally extending trunnions 9 which are adapted to ride within the slots 5, thereby holding the yoke within the frame A and at the same time permitting sliding movement of the yokes, the opposite extremities of the slots limiting the movement of the yokeas will be understood. Mounted within each of the lyokes B and extending longitudinally of the same is an extensible shaft C, the section 10 of -which is journaled within the outer end member 7 while the section 11 is slidably mounted within the inner end member 7. The section 11 is preferably rectangular in cross section and has one end thereof bored longitudinally and threaded to receive the threaded inner extremity 12 of the'se'ction 10, while the opposite end is normally disposed between the inner extension 8 and is tapered toward one edge to provide the cam surface 13. The outer ends of each of the sections 10 are disposed between the outer extensions 8 and are each provided with a beveled pinion 14while rigidly secured to the outer extensions 8 are the opposite extremity of a U-shaped handle 15, thelatter being vertically disposed and arrangedi at right angles tothe frame A. The end ofv each of the handles l'l-areconnected by means of the bearing liwhile extending longitudinally of the "handle is a shaftv 17 which has its opposite end j ournaled in the upper end of the handle and the bearing 16 respectively, the lower end oftheY shaft being disposed between the outer extension 8` of the yoke B and provided with a beveled pinion 18 which is ladapted to mesh with and drive the pinion 14. The upper ends of each of the -shafts 17 are provided with operating heads 19 Which are in this instance in the form of milled Wheels.

Arranged upon the opposite sides of the frame A and adjacent its inner end are the side stretching elements D Which are similar to that shown in my prior patent. The stretching elements D, are provided upon their confronting sides with a shank 20 which extends through the slots 5 formed in the side members 1 and the outer extension of the inner extensions 8, its inner end being inclined transversely to provide the cam surface 21. This cam surface 21 is adapted to engage thecam surface 13 of the sections 11 as Will be hereinafter described. The toe stretching element as indicated at E is of any suitable construction and is provided With an extendible shaft C comprising the sections 10 and 11, the same being constructed in a manner similar to the previously described shaft C With the exception that the section 11 is not provided with a cam surface but is extended through the end Wall 2 of the frame A and is formed integral With the toe stretching element E. This element E is actuated in a manner similar to that shown in my 'previously mentioned patent, parallel bars 4 being provided With a handle 22 Which is pivotally mounted thereon and in Which a shaft 23 is journaled, the loWer end of the shaft being provided with a beveled gear 24: Which is adapted to mesh and drive the pinion 18 formed on the outer end of the section 10.

In operation, 'the frame A is inserted in a shoe the operating head and a portion of the handles 15 and 22 projecting from the /top of the shoe as Will be understood. By rotating the shafts 17 and 23 through the medium of the head 19, the sections 10 of the shaft C Will be rotated so as to advance or retract the sections 11 and consequently the cam surfaces 13. Assuming that` the sections 11 have been moved forwardly, they will be caused to engage the cam surfaces of the shanks 20 thereby causing the side stretching elements to be moved laterally of the frame and thus exerting an outward pressure against the upper shoe. Vhen it is desired to adjust the side stretching elements E to a point upon the upper of the shoe, the elements being carried by the yokes B, by sliding the latter between the bars 1 and A, a corresponding adjustment Will be imparted to the side stretching elements E,

the trunnions 9 working Within the slots 5 as has been described. After the shoe has been sufficiently stretched, the device may be Withdrawn from the shoe by reversing the operation of the shaft to retract the sections 11 thus permitting the shanks 20 to be moved inwardly into the frame thereby causing the side stretching elelnents to disengage the upper of the shoe as will be understood.

It Will be evident from the foregoing that 1 have provided simple and eflicient means for actuating the side stretching elements to properly stretch the upper' of the shoe and thatthe said elements'may be adjusted to any part of the upper by movement of the yoke B.

That l claim is 1. An expansible shoe last comprising a frame, a Vyoke slidably mounted in the frame, extensible shafts journaled in the yoke, and stretching elementsr movable in the` frame and having a cam engagement with said shaft.

2. An expansible shoe `last comprising a frame, yokes movable -in the frame, extensible shafts journaled in the yoke, stretching elements movable in and with the yoke and having a cam engagement with the said shafts, and means operable exteriorly of a' shoe for independently moving each of the yokes and stretching elements.

3. An expansible shoe last comprising a frame, a plurality of extensible shafts journaled in and moving longitudinally of the frame, stretching elements movable in the frame and with the shafts and having a cam engagementivith the shafts, and means operable exteriorly of the shoe for extending the shafts to move the stretching elements and for moving the shafts longitudinally of the frame.

4f. An expansible shoe last comprising a frame, L-shaped vokes slidable in the frame` shafts journaled in each arm of the yoke and engageable with each other, one of said shafts being formed of extensible sections threadedly engaging each other, one of the sections having a cam surface, and stretching elements movable in the yokes and having cam surfaces engageable with the cam surfaces of said sections for moving the elements laterally of the frame.

ln testimony whereof l alix my signature.

CARL SCHEVITZ.

Gopies of this patent may be obtained for ve 'cents each, by addressing the Commissioner of Patents, Washington, D.

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