US373840A

US373840A - Shoe-last

Info

Publication number: US373840A
Authority: US
Publication date: 1887-11-29
Anticipated expiration: 1904-11-29

Description

(No Model S. B. MONAMARA.

, SHOELAST.

' No. 373,840. Patented Nov.

UNITED STATES PATENT OFFICE.

S. BURTON MONAMAR-A, OF HAVERHILL, MASSACHUSETTS.

SHOE-LAST.

SPECIFICATION forming part of Letters Patent No. 373,840, dated November 29, 1887. Application filed September 19, 1887. Serial No. 250,091. (No model.)

To aZZ whom it may concern:

Be it known that I, S. BURTON MONAMARA, a citizen of the United States, residing at Haverhill, in the county of Essex and State of Massachusetts, haveinvented certain new and useful Improvements in Extension-Lasts,- and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters orfigu resof reference marked thereon, which form a part of this specification.

This invention relates to lasts adapted particularly to the" manufacture of turned shoes, so called. It consistsin an extensionlast, the peculiar features in the construction of which will be hereinafter more fully described.

The drawings represent in Figure 1 a central vertical section longitudinally of an extension-last embodying my improvements with the block in its retracted position. Fig. 2 is a plan of the last with the block removed; Fig. 3 is a plan of the under side of the block.

As before premised, the primary object of my invention is to produce an extension-last.

To those skilled in the art it is well understood that an extension-last is almost a necessity in the manufacture of shoes, particularly that class styled turned shoes, for the rea son that the same last is generally reinserted and is employed during the finishing process. To effect this object I have formed a last which is composed of a main body, B, and block C. One prominent feature in this last A is embodied in the block portion,which contains the toe D. This result is secured by cutting the last A as an entirety, not in the usual manner, leaving the toe partintact with the main body B, but in dividing it by an oblique curved out, which leaves the toe attached to the block; hence the last is shortened upon retraction of the block, as shown in Fig. 1, the latter-piece moving back and obliquely upward upon the main body.

the numerals 24, which represent the concave ones on the main body, while 24are the convex surfaces on the block. This cut extends forward down through the bottom of the last to a point a short distance from the extremity of the toe thereof; hence the last is composed of two sections-the main body B and the block 0, with the toe portion D. Upon rearward movement of' the block, which moves likewise obliquely upward, the last is temporarily reduced in length and its withdrawal from the shoe facilitated without stretching or straining the material composing the latter. The for- Ward travel of the block is limited by the contact or meeting of the surfaces 3 3, and therefore the size of the last likewise. These shouldersS 3 extend across the last, and thus brace the spring-catch against any twisting motion, besides limiting the movement of block 0 on body B.

To connect the block to the body of the last, I have inserted in the surface 2 a plate, b, slotted'longitudinally at 0 and adapted to receive a bolt, d, which is screwed to the block 0, the head of said bolt engaging beneath the plate, while the main body B is grooved to permit passage to and fro of the bolt-head. Thus endwise movement of the block is effected upon and with respect to the body portion B.

To secure the retaining-bolt in the block, I have bored ahole, e, whichopens upon the bottom of the last, as shown in Fig. 1. The bolt is inserted therein and, by means of a suitable tool, properly positioned in saidblock, when a plug, f, is driven into the hole to coverit and preserve the surface of the last A unimpaired. Furthermore, to prevent the block from retracting or springing back when in the act of lasting a shoe, I have secured within a recess upon the under convex side, 2', of the block a plate-spring, g, which is provided with astud or locking-pin, h, adapted to engage a hole, '6, in the plate b near its upper end, thus forming a spring-catch for the two parts of the last. This plate-spring projects slightly beyond the top of the last, and thereby enables the operator to actuate it whenever he desires to remove the last A.

As the extremity of the bottom of the last in the body portion is somewhat reduced where it joins the toe portion, I have preferably se IOC cured upon the surface 4 a thin metallic plate, j, which strengthens and prevents it from being chipped or broken; but this plate may be omitted without affecting the action of the last proper. t

The operation of the last is simple-that is, presuming it to be in position with the block disposed as shown by the dotted lines in Fig. 1, and that it is desirable to withdraw it from a shoe. The laster pushes forward the platespring g, disengaging the stud from the hole 1', in which it sets, when the block can be retracted. This rearward travel withdraws the too D with it, and thereby shortens the last A sufficiently to enable the body B to be obliquely tilted and readily removed. This is easily done, since the pressure from the toe and instep is obviated by the movement of the block andtoe part obliquely upward upon the body B.

As above described, the extensible last A is, when in an extended position, of smooth and uniform contour in every portion and perfectly adapted to lasting uppers of any description, while its extensibility enables it to be used in fine work, where an ordinary last is not available.

1 am aware that extension-lasts have been made, and therefore I do not broadly claim this feature of construction; but I have no knowledge of a last which has been formed in two sections-a body portion and a block having the toe portion attached to it-by an oblique cut extending from the upper part near the ankle forward to and through the bottom at a 7 point near the toe of the last. Thereby the last, when in an extended position in the shoe, preserves its contour unimpaired in every part, in eontradistinction to'extensionlasts in which aslot or space exists between the two parts when actively extended, this space preventing the employment of lasts of this class in lasting uppers where one made and embodying my improvements could be used.

Vhat I claim is- 1. An extension-last composed of the main body B and block O,in combination with plate Z1, flush with the inner face of said body and having theperforationiformedinihandthespringplate 9, attached to and countersunk in the corresponding face of the block and provided with a stud, h, for entering said perforation, said block having the toe integral with itand being adapted to move obliquely to and fro on the main body, substantially as set forth.

2. As an improved article of manufacture, an extension -last, A, composed of the main body B, block 0, and the plate I), having slot and perforation i, the screw (7, engaging with the walls of said perforation, and the springplate 9, provided with stud It, for entering said perforation, said block having the toe D integral with it and adapted to move obliquely to and fro upon the main body, substantially as and for the purposes stated.

3. In an extension-last, the main body B, having the oblique concave surfaces 2 4, shoulder 3, the slotted plate b, and the imperforate plate 9, combined with the block 0, the toe D, integral therewith, having similar convex surfaces, 2 4, the interlocking shoulder 3, and spring g, with its pin h, all operating substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

S. BURTON MGNAMARA.

Vitnesses:

G120. W. WENTwoRrH, J ARED M. DAVIS.