US1798225A - Floor jack - Google Patents

Description

March 31, 1931. M c. R'OQK ET AL moon JACK Filed Jan. 8, 1930 2 Sheets- Sheet 1 Wzzzz'amgl S ar/rs, Gerzeraljf G/Fa/vmam, INIVENTORS.

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March 31, 1931. c RQQK ET AL I 1,798,225

FLOQR JACK Filed Jan. 8, 1930 2 Sheets-Sheet 2 JYZrybw 6'. 300k [Valium 6: 51 a r/rsj ATTORNEY.

Patented Mar. 31, 1931 [UNITED STATES PATENT; OFFICE MARION CICERO BOOK AND WILLIAM GOODMAN SPARKS, F HENDERSON, AND GENERAL HUGH CHAPMAN, 0F LANEVILLE, TEXAS FLOOR JACK Application 'filed January 8, 1930. Serial No. 419,332.

The present invention relates to improvements in floor laying devices, and has referonce more particularly to a jack for use in laying tongue and groove flooring, siding,

or the like, where it is required that the boards be brought snugly together. 7

One of the important objects of the present invention is to provide a floor jack of the above-mentioned character that will at all times be positive and efficient in its operation, the same being further simple in construction, inexpensive, strong and durable.

A further and important object is to provide a floor jack of the above-mentioned character which includes a base having a boardengaging head formed on its forward end and being provided with j oist-engaging spurs at its rear end, an operating lever being fulcrumed at its lower end on the intermediate portion of the base and being oper atively connected to the forward end of a ratchet bar, the rear end of which isformed with a joist-engaging foot that also carries an anchoring spur; there being arranged on the rear end portion of the base, a pivoted pawl for cooperation with the ratchet bar whereby the movable base and floor-engaging head will be held in its advanced position.

Other objects and advantages of the invention will become apparent from the following description when taken in connection with the accompanying drawings.

In the accompanying drawings wherein like reference characters indicate corresponding parts throughout the several views Figure 1 is a side elevation of our improved floor jack showing the same in use.

Figure 2 is a similar view, parts of the jack being shown in section with the dotted lines indicating the relative positions of the parts during the operation of the jack.

Figure 3 is a sectional View taken approximately on the line 3-3 of Figure 1 for disclosing the floor jack in top plan.

Figure 4 is a detail perspective view of the base; and b Figure 5 is a similar view of the ratchet In the drawings wherein for the purpose of illustration is shown thepreferred embodiment of our invention, the numeral 1 designates generally the base of the jack, the

same being formed at its forward end with the enlarged head 2 and the forward edge of the head is provided with the longitudinal slot 3 to fit the tongues of flooring, siding and the like. The upper front portion of the head 2 is cut-out as indicated at 4 in order to facilitate the driving of nails into the floor boards as they are laid.

The base 1 is formed with the longitudinal slot 5 that extends from the rear end to a point adjacent the head 2 thus forming the parallel spaced arms 6. Apertured lugs 7 extend upwardly from the rear ends of the I arms 6 adjacent the inner opposed faces thereof and the rear free ends of these arms are slightly enlarged and projecting downwardly understood of course that the lever 9 is adapt-' ed for swinging movement between the spaced arms of the base.

Forming a salient part of the present invention is the elongated ratchet bar 11 shown in Figure 5 of the drawings. This bar is formed at its forward end with the upwardly curved portion 12 terminating in the bifurcated laterally disposedyoke 13 that straddles the lever 9 at a point above the fulcrum 10 and a pivot pin 14 extends transversely through the free ends of the arms of the yoke 13 and the adjacent portion of the lever 9 to provide an operative connection between the lever and the ratchet bar. The ratchet bar is furthermore formed at its opposite end with the downwardly inclined foot 15, the bottom face thereof being slightly rounded and projecting from the bottom face of the foot 15 is the j oist-engaging spur 16.

The ratchet bar 11 is arranged for disposition between the spaced arms of the base 1 and formed in the upper face of the ratchet bar are the transversely disposed teeth 17 with which cooperates the pivoted pawl 18 mounted on a pin 19 that extends through the apertured upstanding lugs 7 in the manner as clearly shown in the drawings. The forward end of the pivoted pawl 18 provides a handle portion 20 for releasing the rear end of the pawl from engagement with the teeth 17.

A pin 21 extends transversely through the enlarged rear ends of the arms (5 to provide a rest for the longitudinally movable ratchet bar 11.

The operation of our improved floor ack is thought to be readily obvious from the construction disclosed in the drawings. When the parts are arranged as shown in Figure 1, a rearward pull upon the lever 9 will cause the base 1 and the head 2 to move forwardly and force the flooring board A to be brou into interlocking engagement with the section of flooring already laid whereupon a nail is driven into the board. In this operation, the spur 16 is anchored in the top of the joist B. A further downward pressure on the lever 9 will cause the spurs 8 to bite into the floor joist B thereby locking the base and the head 2 against further longitudinal sliding movement. Subsequently the mud 18 is released from the ratchet teeth 17 and a forward pull upon the lever 9 will cause the ratchet bar 11 to travel forwardly to its foremost position whereupon the spur 16 is again anchored in the joist B, this operation resulting in the spurs 8 being brought out of engagement with the joist whereupon the operation of the floor jack is repeated to cause a further forward sliding movement of the board.

It will thus be seen from the foregoing description, that we have provided a floor jack that will at all times prove positive and efiicient in its operation and due to its simplicity, can be readily and easily adjusted. Also a fioor jack of this character can be constructed at a very low cost and the same will be strong and durable. By the use of our improved floor jack, considerable time and labor will be saved in laying a floor, sidin ceiling or the like.

lVhile we have shown the preferred em'- bodiment of our invention, it is to be understood that minor changes in the size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention and the scope of the appended claims. lVhile the invention has been particularly re ferred to as a floor jack, it is obvious that it may be employed for any other suitable purpose without departing from the scope of the invention as claimed.

lVhat we claim as new is:

1. In a floor jack of the class described, a base, a floor-engaging head carried by the forward end of the base, a ratchet bar arranged for slidable movement on the rear end portion of the base, a support-engaging foot formed on the rear end of the ratchet bar, an anchoring spur carried by the foot, an actuating lever fulcrumed at its lower end on the base, the forward end of the ratchet bar being operatively connected with the lever at a point above the fulcrum, and a pivoted pawl carried by the base for cooperation with the ratchet bar as and for the purpose described.

2. In a floor jack of the class described, a base, a floor-engaging head carried by the forward end of the base, a ratchet bar arranged for slidable movement on the rear end portion of the base, a support-engaging foot formed on the rear end of the ratchet bar, an anchoring spur carried by the foot, an actuating lever fulcrumed at its lower end on the base, the forward end of the ratchet bar being operatively connected with the lever at a point above the fulcrum, and a pivoted pawl carried by the base for cooperation with the ratchet bar, and a support-engaging spur carried by the rear portion of the base and adapted to bite into the support only when the ratchet bar has moved forwardly and a downward pressure is exerted upon the rear portion of the base as and for the purpose described.

3. In a floor jack of the class described, a base, a floor board engaging head formed on the forward end of the base, a lever fulcrumed at its lower end on the base rearwardly of said head, a pair of spaced upstanding lugs formed on the rear portion of the base, an elongated ratchet bar arranged for slidable movement between said lugs, a yoke formed on the forward end of the ratchet bar and being operatively connected to the lever at a point above the fulcrum, a support-engaging foot formed on the rear portion of the ratchet bar, an anchoring spur carried by the bottom of the foot, and apivoted pawl mounted between the lugs for cooperation with the ratchet bar to prevent the return movement of the base and the head, said base and head being moved forwardly when the lever is swung rearwardly and the spur is in biting engagement with the support.

4:. In a floor jack of the class described, a base, a floor board engaging head formed on the forward end of the base, a lever fulcrumed at its lower end on the base rearwardly of said head, a pair of spaced upstanding lugs formed on the rear portion of the base, an elongated ratchet bar arranged for slidable movement between said lugs, a yoke formed on the forward end of the ratchet bar and being operatively connected to the lever at a point above the fulcrum, a support-engaging foot formed on the rear portion of the ratchet bar, an anchoring spur carried by the bottom of the foot, and a pivoted pawl mounted between the lugs for cooperation engagement with the support when the ratchet bar is at the limit of its forward movement, and a downward pressure is exerted upon the rear end portion of the base as and for the purpose described. In testimony whereof we aflix our signatures.

MARION CICERO BOOK. WILLIAM GOODMAN SPARKS. GENERAL HUGH CHAPMAN.

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