US412947A - Lasting-jack and support - Google Patents

Description

(No Model.) A S CLARK LASTING JACK AND SUPPORT.

No. 412,947. Patented Oct. 15, 1889.

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SAMUEL CLARK, OF ROCHESTER, NEW HAMPSHIRE.

LASTlNG-JACK AND SUPPORT.

SPECIFICATION forming part of Letters Patent No. 412,947, dated October 15, 1889. Application filed June 20, 1889. Serial No. 314,989. (No model.)

To all whom it may concern.

Be it known that l, SAMUEL CLARK, a citizen of the United States, residing at Rochester, in the county of Strafford and State of New Hampshire, have invented. certain new and useful Improvements in Lasting-Jacks and Supports, of which the following is a specification.

The objects of this invention are to provide a jack which, by the peculiar construction of its heel and toe piece, will readily accommodate itself to any last from childrens sizes to the largest of mens sizes, and to provide a post upon which to mount the jack, which may be easily adjusted to various heights.

The invention will be fully set forth in the following specification and claims and clearly illustrated in the accompanying drawings, forming an inseparable part thereof, of which- Figure 1 is a sectional elevation of my improved jack mounted upon an adjustable supporting-post. Fig. 2 is a detached elevation of the toe-piece. Fig. 3 is a detached sectional view of a modification of that piece upon which the jack is swiveled, and Fig. 4 is a modification of the lower end of the supporting-post and its socket-piece.

Similar letters indicate like parts throughout the various views.

The jack is made, preferably, in the form shown in the drawings, having an arm A, rising in the form of a goose-neck, which ter- ,minates in a straight or nearly horizonal arm or projection a, upon which to mount an adjustable toe-rest, and provided also with an arm A, rising at an angle, and cored or slotted at a to receive the lower end of an adjustable hee1rest, as shown. The lower part A of the jack is turned to fit a central perforation b of the jack-block B, thereby forming a shoulder a, which will rest upon the top I) of said block. The bottom of said block may be chambered out at b to receive the upper enlarged end of the supporting-post D, which is preferably formed hollow, as at cl, and upon the lower end of said post is formed a finished journal D, turned to fit a socket E, which should be bolted to the floor. It is often desirable to adjust said post vertically, in which case the journal 1) may be threaded to fit a threaded opening 6 in the socket-piece E, as in Fig. 1; or, if a less rigid support is preferred, the threads maybe omitted from the journal D and its socket-piece E and a suitable spring be placed underneath the said journal. This maybe of rubber or of metal and made in the form of a helical spring F, as seen in Fig. 4. The top of the supporting-post D is provided with a circumferential groove cl, as seen in cross-section, Fig. 1, into which the tips of two or more set-screws B (which are threaded to openings formed in the lower part of theblocl; B and communicating with the chamber 12) may rest. Thus by loosening said screws B the block B may be adjusted in a rotative course upon the supporting-post, and by tightening the said screws the connection of the block with said post may be made rigid. A11 adjustable heel rest or block C is ful crumed at o to the arm A of the jack, and is provided with shoulders c", which, by contact with the top of said arm A, limit its forward and backward movcn1ent,in which it is placed to suit the convenience of an operator, in either of which positions it. may be firmly held by means of a helical spring c ,'mounted upon a rod 0 having its upper end pivoted at c to the bottom of the adjustable heel-block C, and its lower end adapted to play somewhat loosely in an opening made for the purpose in the bottom of the cored portion a of the arm A, the said helical spring operating expansively between a nut which is threaded to said rod 0 and the bottom of said cored portion a. A last G is mounted upon the heelbloclc C by means of a spindle g, projecting upward from said block and entering a hole in said last, said spindle being secured within the said heel-block by a set-screw g. The block G of the last is also supported by the heel-block C, as seen in Fig. 1. The toe rest or block C is preferably made in the form shown in the drawings, and may be readily adjusted upon the arm a. of the jack to various lengths of lasts by means of a setscrew 0 The jack is secured to the block B by means of a bolt H passing upward through central openings in both, and to which a nut h is threaded above said jack. In order that the jack may be more easily rotated or swiveled upon the block. B, while still being firm enough to operate upon, said bolt may be made sufficiently long to have mounted upon it a helical spring I, which will work expansively between its head h and the under surface of the block B, or between washers provided upon said bolt for the purpose, as seen in Fig. 1. The jack may be mounted at an angle upon the said block B, if desired, by

bench-post; and said post D may be prevented from accidentally rotating by threading a setscrew K to said sleeve J and setting it hard upon said post.

To hold the last firmly upon the toe-rest, an ordinary strap L, provided with a buckle Z, may be perforated at Z to receive a cap-screw M, which is threaded to an opening in the arm 0,.

Having described my improvements, what I claim as new, and desire to secure by Letters Patent, is

1. A lasting-jack and its support combining the following elements: a pivoted adjustable heel-block provided with a spindle for mounting a last and shoulders for limiting its motion by contact with the arm of the jack to which it is pivoted, a horizontal arm and an adjustable toe-rest provided with a set-screw for securing it at any desired point upon said arm, a strap provided with a buckle and connected by set-screw to said arm,'a jack-block to which said jack is swiveled, as shown, and provided with an annular flange at its bottom, a vertically-adj ustable support fitting Within the flange of said jack-block and provided with an annular groove in its side, and two or more set'screws threaded to the flange of said jack-block and adapted to enter and rest in the groove of said support, all substantially for the purpose set forth.

2. The combination, with an adjustable hollow support having an annular groove near its top, of a jack-block having its bottom chambered to receive said hollow support,

provided with set-screws in its sides to enter the groove therein, and a socket in its top, a lasting-jack having a turned portion fitting the socket in said jack-block, and a bolt passing through both said jack and jack-block,

provided with a helical spring upon its lower end operating eXpansively against said jackblock.

3. In a lasting jack, a hollow adjustable support, a j ack-block mounted and capable of adjustment in a rotative course thereon, having its top surface inclined and provided with a socket sunk at right angles therewith, a lasting-jack having a turned portion fitting the socket in said jack-block, and abolt passing through both jack and jack-block, provided with a helical spring operating expansively against the latter, all substantially for the purpose specified.

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

SAMUEL CLARK.

WVitnesses:

J. B. THURSTON, NATHANIEL E. MARTIN.

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