US2027703A

US2027703A - Shoe jack

Info

Publication number: US2027703A
Application number: US731584A
Authority: US
Inventors: Ribar Peter
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-06-21
Filing date: 1934-06-21
Publication date: 1936-01-14
Anticipated expiration: 1953-01-14

Description

Jan 141, 1936., p WEAR 2,627,703

SHOE JACK Filed June 21, 1954 Patented Jan. 14, 1936 UNITED STATES PATENT OFICE.

SHOE JACK Peter Ribar, Pueblo, Colo. Application June 21, 1934, Serial No. 731,584

4 Claims.

This invention relates to a shoemakers jack for supporting lasts in making and repairing shoes.v The principal object of the invention is: to provide a neat and efiicient device which will firmly hold a last in either of two or more directions and which can be quickly and easily released to change the direction as desired without the necessity of removing the hands from the: work.

Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and efliciency. These will become more apparent from the following description.

In the following detailed description of the invention reference is had to the accompanying drawing which forms a part hereof. Like numerals refer to like parts in all w'ews of the drawing and throughout the description.

In the drawing:

Fig. 1 is a side elevation of one form of the improved shoemakers last.

Fig. 2 is an enlarged, fragmentary, section therethrough.

Fig. 3 is a horizontal section taken on the line 33, Fig. 2, looking upwardly.

Fig. 4 is a vertical fragmentary section of an alternate form of the jack.

Fig. 5 is a horizontal section, taken on the line 5-5, Fig. 4.

Fig. 6 is a similar section, taken on the line 6--6, Fig. 4.

The invention comprises a hollow standard I!) enlarged at its bottom to provide a supporting foot II. A last shank i2 is carried in the top of the standard it for supporting any of the usual lasts l3. The last shank i2 is provided with a supporting flange it which rests upon the top of the standard iii, and with a stub portion l4 which projects into the standard Ii].

Two crossed notches or grooves l5 are formed in the bottom of the portion l -l, preferably at right angles to each other. The grooves 15 receive a locking key It which extends across the standard It through slots II in the opposite sides thereof. The key It is supported on a plunger I8 arising from a hinged connection I9 on a foot treadle 20.

The plunger l8 and the foot treadle are constantly urged upwardly by means of any suitable spring 2|. The plunger may be maintained centrally of the standard In by means of a suitable bearing bracket 22 or in any other suitable manner.

It can be readily seen that if the foot treadle vertical 26 is depressed, it will withdraw the key It from the groove It so that the last 16 can be turned to a right angular position. When the new position is reached, the key I6 will snap into the other lateral groove 55 and lock the 5 last in the new position. This enables an operator to turn his Work as much as required without interrupting the use of his hands. When working around the edge of a sole, the operator can hold the treadle depressed so that the shoe may be readily revolved.

In Figs. 4, 5, and 6, an alternate form of the invention accomplishing the same functions is illustrated. In this form, a similar standard 23 is employed for supporting a last shank 24. The stub portion of the last shank in this form, however, is provided with vertical grooves 25 in its sides. The standard carries oppositely positioned locking dogs 26 which are constantly forced against the shank 24 by means of suitable wire springs 21. The locking keys 26 are carried upon pins 28 which pass through slotted holes 29 in the keys so that they are free to move outwardly.

Immediately below the locking keys 26 is a releasing ring 3 mounted on the upper extremity of a push rod 3| which terminates in a foot treadle 32. It can be readily seen that if the foot treadle is depressed, it will raise the releasing ring 36, causing it to pass between the opposite keys 38 so as to force them outwardly. This releases the last shank 24 so that it may be freely turned to any desired position, at which time the dogs 2% will again snap into the grooves 25, provided the foot treadle has been released.

. While a specific form of the improvement has been described and illustrated herein, it is desired to be understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired secured by Letters Patent is:-

1. A shoemakers jack comprising: a hollow vertical standard; a last shank rotatably mounted in the top of said standard and having crossed grooves in its bottom; a key member extending laterally across said standard and engageable in said grooves; a spring acting to force said key member into said grooves; a foot treadle projecting from said standard adjacent the bottom thereof; and a connecting rod extending from said foot treadle to said key memher to withdraw the latter from said grooves when desired, said key member extending through slotted holes in the opposite sides of said standard.

2. A shoemakers jack comprising: a vertical tubular standard having vertical slots formed in its opposite sides adjacent the top thereof; a T-shaped latch member with the extremities over its head projecting oppositely outward from said standard through said slots with its stem extending downwardly within said standard; a foot treadle connected to the lower extremity of said stem to move the latter downwardly; a spring arranged to move said stem upwardly; a last shank mounted to rotate in the top of said standard, the bottom of said last shank being provided with crossed grooves for receiving the head of said latch member.

3. A shoemakers jack comprising: a hollow vertical standard; a last jack arranged to rotate in the top of said standard; a supporting flange surrounding said jack to limit its insertion in said standard; said last jack having crossed grooves formed in its bottom substantially at right angles to each other; a locking key extending across said standard below said grooves,

there being vertical slots in the walls of said standard to receive the extremities of said key; a plunger extending downwardly from the midportion of said key Within said standard, said plunger being fixedly secured to said key; and a foot treadle operably connected with said plunger so as to pull said key from said grooves when desired.

4. A shoemakers jack comprising: a hollow vertical standard; a last jack arranged to rotate in the top of said standard; a supporting flange.

surrounding said jack to limit its insertion in said standard; said last jack having crossed grooves formed in its bottom substantially at right angles to each other; a locking key extending across said standard below said grooves, there being vertical slots in the walls of said standard to receive the extremities of said key; a plunger extending downwardly from the mid portion of said key within said standard, said plunger being fixedly secured to said key; and a foot treadle operably connected with said plunger so as to pull said key from said grooves when desired; and a bearing bracket within said standard acting to guide said plunger.

PETER RIBAR.