US1630191A - Shoe-raising-platform device - Google Patents

Description

1,630,191 C. LIBERMAN SHOE RAISING PLATFORM DEVICE Filed Aug 19, 1926 2 Sheets-Sheet l May 24, 1927.

WITNESSES ATTORNEYS May v24, 1927. 1,630,191

c. LIBERMAN SHOE RAISING PLATFORM DEVICE Filed Ag. 19, 1926 2 Sheets-Sheet 2 INVENTOR OWHLEs L/Bffi/VHN ATTORNEYS Patented May 24, 1927.

UNITED STATES.

CHARLES LIBERMAN, OF NEW YORK, N. Y.

SHpE-RAISING-ILATFORM DEVICE. 7

Application filed August 19, 1926. Serial No. 130,259.

This invention relates to a shoe raising platform and has for an object to provide an improved simplified construction whereby a minimum number of parts are presented.

Another object of the invention is to provide a shoe raisin-g platform wherein the parts will quickly and automatically move whenv released.

A still further object of the invention is to provide a shoe raising device in which a lazy tong structure is used, the constructionbeing: such that upon a proper release, meanswill function to cause the lazy tong structure to be extended and when properly acted on by the foot will cause the lazy tong structure to be collapsed whereby the efied five height of the person standing on the device will be varied.

In the accompanying drawings- Figure 1 is a longitudinal vertical sectional view through a shoe raising platform disclosing an embodiment of the invention.

Figure 2 is a sectional view through Figure 1 on line 2-2. v

Figure 3 is a horizontal sectional'view through Figure 1 on line 3-3-.

Referring to the accompanying drawings by numerals, 1 indicates a platform adapted' to receive a shoe, said platform having a pair of webs 3 at the bottom. It is to be understood that two of these devices are used together as a rule and that aperson will place a foot on each of the platforms 1 and then operate the mechanism herein described whereby the platforms may be raised or lowered so that the person may be moved upwardly or downwardly to work on a wall or ceil'ii'ig or other place as desired. Coacting with the platform 1 is a base 4 which is provided with a: pair-of upstanding flanges 5y each of said flanges being provided with slots 6* and 7 througlr which the re spective axles 8 and 9 extend. Each ofthe axles 8 and 9 carries a pair of rollers, name 1y, rollers 10 and 11. Suitable nuts 1:2 are provided at each end of each axle so as to hold the axles properly centered. The slots 6' and 7 permit a loose motion of the axles so that the rollers 10 and 11 may bear on the upper surface 1'3 of base 4. This causes the flanges 5 to act merely as guiding mem bers for the axles as they move back and forth. A pair of arms 14 is connected with axle 8 and similar pair of arms 15 is connected with a'Xle 9, said arms crossing at a central point where they are pivotally connected' together by a-rod or shaft 16, which rod or shaft also extends through the vertical guides 17. These guides are riveted or otherwise rigidly secured to the base 41 and cause the rods 16 to move at right angles to the surface 13 or usually in a verticalhp and-down direction. The arms 14 and 15 form part of the lazy tong structure 18. The upper arms 19 and 20 of the lazy tong structure 18 are mounted on the axles 21 and 22 which carry the respective pairs of rollers 28 and 2 1 adapted to bear against the surface 25 of the platform 1. Suitable nuts 26 are carried at each end of the axles 21 and 22 for preventing undue longitudinal movement. comparatively strong springs 27 and 27 are connected to the axles 22 and 21 respectively, said springs at their opposite ends being connected to posts 84 and 35 respectively. These springs are under tension so that they will continually act to move the axles 21 and 22 towards each other and thereby distend the lazy tong structure 18. This will cause theplatform 1 to move away from the base 4;. The springs 27 and 27 normally cannot function by reason of the notched locking bar 28 said bar having a series of notches 29 for each of the axles 8 and 9;- This bar is resiliently held in a lower position by the various springs 32 at the center and at the ends, and bar 28 extends through slots 36 in their respective posts 37 and 38, which are rigidly secured to base 1. A cord or cable 33 is connected to each end of the locking bar 28 and is adapted to be grasped by the person standing on the platform 1. From Figure 1 it' will be noted that the posts 37 and 38 are provided with notches 39 adapted to accommodate the respective locking bolts on catches 40 and 11. These bolts or catches are urged by the respective springs 412 and 43 so that they will snap into any of the notches whenever permitted. A cable 1 1 is connected. to each of thebolts 40 and 11 so that when it is desired to release the platform 1 cables 1 1 must be pulled and simultaneously therewith or shortly thereafter cables 33 must be pulled whereupon the platform 1 must be forced downwardly or may be allowed to move upwardly under the platform rigid. Without these catches there is a small give or yield to the lazy tong structure 18. but by using these catches the platform is rigidly held in any adjusted position.

hen two devices are used. the weight is removed from one of the platforms 1 and cords or cables it and 33 are pulled until the catches or locking bolts if and 41 and locking bar are all disengaged. This will permit springs 27 and QT to function where.- by the platform is raised as far as the foot posed above the same will permit. The raising action at one time is usually not more than six inches. After the parts have been raised the desired distance. as for instance, six inches. the cords or cables l-l and 33 are released and locking bar 28 will resume the position shown in Figure l and also the bolts or catches 4-0 and ll will move into certain of the notches 38. The weight of the worluuen may then rest on the raised platform 1 and the other platform may then be raised in a similar manner. If the new height is not sufiicient. the operation will be duplicated once or as often as desired within the limits of the device.

lVhen it is desired to lower the platform 1 the locking bar 28 is raised and the catches l0 and ell disengaged. After this has been done and while these parts are held in a disengaged position platform 1 is pushed downwardly by the weight of the person. said downward movement being any desired distance, as for instance. six inches. The locking bar 28 is then allowed to resume its locking position as shown in Figure 1. and catches 4t) and ll allowed to snap into certain of the notches 39, and then the other device is lowered in a similar manner. This action is continued until the lazy tong 19 has been completely collapsed or collapsed to the desired extent. If desired. straps or other fastening means can be associated with the platform 1 so as to connect the same with the foot of a workman. though ordinarily this is not necessary. Also; if desired. a board or plank can be placed across two of the plattorn'is and the platforms elevated as described so that the device will act as a collapsible and distensible device for supporting a scatl'olding.

hat I claim is:

1. A. shoe raising platform comprisii'ig a lazy tong structure. a base associated with one end of the lazy tong structure. a platform associated with the other end of the lazy tong structure. a spring tending continually to distend said lazy tong structure. a vertically movable locking bar formed with means for locking the lazy tong structure against distention. and means extending from said bar to a position adjacent the platform whereby a person standing on a platform may move the looking bar to an unlocked position. and a spring for automatically returning said bar to a locking position when the bar is released.

2. A shoe raising plat l'orm device incliniing a lazy tong. a platform carried by one end of the lazy tong. a spring continually tending to cause said lazy tong to be dis tended. a rod connected to each leg of the lazy tong at the lower end. a base formed with guiding means for guiding said rods in a back and forth horizontal movement: at right angles to their axes. a vertically movable notched bar adapted to engage and lock said rods against movement. a spring for normally holding said notched bar in a locked position. and means extending from said notched bar to a point adjacent the platform whereby any one standing on the platform may raise the notched bar out of engagement with said rods and permit said spring to function.

3. In a shoe raising platform device a lazy tong structure. a platform adapted to he raised by the lazy tong structure, a base, a rod extending through each leg of the lower end of the lazy tong structure. means carried by the base for permitting said rods to more parallel to the base as the lazy tong structure is distended and collapsed. wheels arried by said rods resting on the base and movable along the base as the lazy tong structure is caused to function. a notched locking bar engaging said rods and nornially locking the. same against movement. and a spring for resiliently holding said notched bar in locking position.

4;. In a shoe raising platform device a base formed with a pair of flanges. each flange having openings therein. a lazy tong having one end positioned near said base. a rod extending through each leg of the end of the lazy tong adjacent the base. said rods extending through said openings. said rods being movable. parallel with the base. anthfriction rollers carried by each of the rods resting on the base. a notched locking bar mounted on said base. and spring means normally holding said locking bar so that said rods will be positioned in one of the notches thereof and thereby looked against movement.

5. In a shoe raising platform device a base provided with a. pair of upstanding flanges. each flange having elongated openings. a lazy tong provided with a rod at the lower end of each leg. said rods extending through said openings. a locking bar carried by the base formed with a series of comparatively deep notches. said rods being adapted to tit into said notches and thereby be locked against movement whereby the lazy tong structure cannot be distended or collapsed. and a spring for normally holding said locking bar in a locked position.

6. In a shoe raising platform device a lazy tong structure, a base for supporting said l on llifi Ian lazy tong structure, a platform supported by carried by said platform for each post, said a lazy tong structure, a spring acting on the catches being adapted to fit into any of said 10 lazy tong structure to give the same tendency notches and flexible members extending from to distend, means for locking the lazy tong said catches to a point adjacent said platform structure in different distended positions, a whereby they may be disengaged whenever pair of posts connected Withsai-d base and desired. extending through said platform, each of said posts having a series of notches, acatch CHARLES LIBERMAN.

Images