US2114779A - Jack - Google Patents

Description

April 19, 1938. H JOSEY 2,114,779

JACK

Filed Feb. 18, 1957 2 Sheets-Sheet l Inventor Aiiorneys J. H. JosEY April 19, 1938.

JACK

Filed Feb. 18, 1937 2 SheetS--S he =:1- 2

Attorneys atented Apr. 19, 1938 TES PATENT OFFICE JACK John H. Josey, Moscow, Tex. Application February 18, 1937, Serial No. 126,491

4 Claims.

l vantages will be best understood from a study of the following description taken in connection with the accompanying drawings wherein:-

Figure 1 is a side elevational view of the jack embodying the features of the present invention.

Figure 2 is an end elevational view of the jack.

Figure 3 is a top plan View of the jack.

Figure 4 is a transverse sectional View taken substantially on the line 4-4 of Figure 3.

Figure 5 is a perspective view of the head end 20 of the jack.

Figure 6 is a fragmentary side elevational view illustrating a slightly modifiedform -0f the invention.

Figure 7 is a perspective view of an anchoring :55 member hereinafter more fully referred to.

, Referring to the drawings by reference numerals it will be seen that my improved jack comprises a substantially U-shaped body bar 5 in which an inverted T bar or slide member 6 has asliding fit.

At the upper edges thereof the sides of the member 5 are provided with outstanding flanges and bolted or otherwise secured to the flanges at one end of the member 5 and as indicated generally at l is a guide plate 8 that serves as a retainer for the slide bar 6.

Secured to one end of the slide bar 6 through the medium of angle brackets or the, like 9 is a head member l0.

As shown in Figure5 the head member ID is hollow beingv open along one side and at the bottom thereof to accommodate a work engaging element or block, such as for example, a piece 45 of flooring or the like shown in broken lines in Figure 5 and indicated by the reference numeral l I. To secure the block I l within the head member It said member at one end is provided with a binding screw I2. As shown in Figure 5 the 50 opposite ends of the member [0 have their inner faces beveled to complement the beveled ends of block I I.

For feeding or retracting the slide 6 relative to the fixed member 5 there is provided a hand 55 lever I3 that is pivoted adjacent its lower end as at H! between a pair of plates l5 formed with rack segments l6.

At one vertical edge thereof the plates l5 are provided with outstanding flanges through the medium of whichand bolts or the like I! said 5 plates are secured to a block member IB that is bolted as at I9 to outstanding flanges 20 projecting from the-sides of the member 5 at one end of the latter.

The hand lever I3 is equipped with a conven- 1o tional detent 2| that cooperates with the rack segments 16 for securing the lever 13 at the desired position of adjustment. Adjacent its pivoted end the lever I3 is connected with the inner end of the slide 6 through the medium of a 15 link 22.

In the form of the invention shown in Figures 1'00 5, inclusive, the jack is provided with an anchoring device in the form of a clamp consisting of a'pair of jaw members 23 pivoted to the plate [8 as at 24 and at the pivots 24 connected by a link 25. A pair of levers 26 are also pivoted together and to the plate H3 at one end of the members 26 as at 21 and adjacent said pivoted end the levers 26 are connected together through the medium of a coil spring 28.

The spring 28 has its respective opposite ends suitably secured to one end of pins 29 that extend through the lever 26 and have their free ends arranged to engage the inner or concave edges 30 of the shanks 23w of the jaw members 23.

Levers 26 are also provided with laterally extending pins 30 that are arranged to engage the convex edges of the shanks 23a of jaws 23 for urging the shanks 23d inwardly in a manner 55 to spread the jaws 23 apart.

From the above, it will be apparent that when laying, for example sub-flooring, the channel member 5 rests longitudinally on. a rafter as:for example suggested in Figure 2 wherein the rafter 4 is illustrated by broken lines and indicated by the letter R. To anchor the jack in place the operator presses down on the levers 26 and as the levers swing downward against the action of spring 28 pins 29 act on the shanks 23a. for '45 causing the latter toswing away from one another and the jaws 23 to swing inwardly into positive gripping engagement with opposite sides of the rafter R. Next the floor plank to be laid is positioned so that the groove-equipped edge 5 thereof will face the tongue equipped edge of the previously laid plank, and the tongue of the plank to be laid intermediate the ends of the plank is engaged in the groove of the block II. The operator, the floor jack being anchored in 5 position, then releases lever l3 and pushes or pulls on the lever swinging the same in a counter clockwise direction for projecting the slide 6 thus forcing the plank being laid into positive edge engagement with the previously laid plank, holding the plank being laid in this position until said plank has been nailed to the rafter. When the plank has been nailed in place, the operator then retracts the slide 6 by swinging the lever l3 in a reverse direction.

Obviously this operation is repeated in the laying of each successive floor plank.

Also the operation is substantially the same when placing sidings or when laying top-flooring.

When laying top-flooring, however, instead of using an anchoring clamp such as shown in Figures l to 5, inclusive and herein described in detail anchoring means such as shown in Figures 6 and 7 may be resorted to. In these figures the anchoring means is shown as consisting of a plate 34 provided at one edge with an upstanding flange 35 apertured as at 36 to accommodate bolts or other suitable fastening elements 31 through the medium of which the flange 35 is secured to the plate E8 of the jack.

The flange 35 projects beyond the lateral edges of the plate 34 and at its respective opposite ends is formed to present right angularly disposed downwardly directed penetrating prongs 31,;

Thus when using this form of the invention for the purpose of laying, as above suggested, topflooring plate 34 rests flatly on the sub-flooring and a downward pressure being exerted thereon the prongs 3T bite into or penetrate the wood of the sub-flooring for anchoring the jack in position.

It will also be seen that in both forms of the invention the plate I8 is braced through the medium of inclined brace bars 38 which at one end are secured as at 39 to the opposite sides of the member and at their upper ends are secured through the medium of the uppermost bolts I! to the outstanding flanges of the rack plates l5, which bolts, as previously described serve also to secure the plates Hi to the plate l8.

To accommodate the brace bars 38 the flanges of the member 5 are notched as at 40.

It is thought that a clear understanding of the construction, utility and advantages of an invention of this character will be had without a more detailed description.

Having thus described the invention, what is claimed as new is:-

1. A jack for laying floors and analogous work, and comprising a substantially channel member, a T bar having a sliding fit in the channel of said member, said T bar being provided at one end with a work engaging head, a vertical plate secured to the channel member at one end of the latter, a clamp mounted on said plate and including a pair of clamping jaws, a vertical rack segment extending inwardly from said plate, a hand lever pivoted to said rack plate and provided with a detent cooperable with the rack plate for securing the lever at the desired position of adjustment and link means operatively connecting said lever with said T bar.

2. A jack for laying floors and analogous work, and comprising a channel member, a slide member having a working bit in said channel member, a work engaging head on one end of said slide member, an upstanding plate secured to one end of the channel member, a rack segment mounted on and extending inwardly from one side of said plate, a lever pivotally mounted on said rack segment and provided with a detent cooperable with the segment for securing the lever at the desired position of adjustment, a motion transmitting link operatively connecting said lever with said slide member for transmitting movement of the lever to the slide member, a work engaging plate provided at one edge thereof with a flange secured to the aforementioned vertical plate, and said flange of the work engaging plate having angularly disposed ends fashioned to provide downwardly projecting penetrating points adapted to bite into the work for anchoring the jack in position.

3. In a floor jack, a member provided at one end thereof with means to engage a. floor beam, a second member mounted on the first mentioned member for sliding movement longitudinally of the latter, a lever pivotally mounted on the first member and having means engaging the sliding member for shifting the latter and for securing said sliding member at the desired position of adjustment, and a head on one end of said sliding member, said head being open at the front and under side thereof and having end walls provided with beveled inner faces, a work engaging element arranged within said head and having beveled end faces complemental to the beveled faces of the end walls of said head whereby to prevent passage of said work engaging element through the open underside of said head.

4. In a floor jack, a member provided at one end thereof with means to engage a floor beam, a second member mounted on the first mentioned member for sliding movement longitudinally of the latter, a lever pivotally mounted on the first member, means operatively connecting said lever with said sliding member for shifting the latter and for securing the sliding member at the desired position of adjustment, and a head on one end of said sliding member, said head being open at the front and under side thereof and having end walls provided with beveled inner faces, a work engaging element arranged within said head and having beveled end faces complemental to the beveled faces of the end walls of said head whereby to prevent passage of said work engaging element through the open underside of said head, and a binding screw threaded through one of the end walls of said head to bind against the adjacent end of said work engaging element to positively secure the latter Within said head.

JOHN H. JOSEY.

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