US779577A - Lifting-jack. - Google Patents

Description

PATENTED JAN-10, 1905. "'EY.

BY .M

APPL

NATION FILED EEB. b, 1904.

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BLlCYNlIY. F NElVAltK, Nlll' JERSEY.

LIFTiNe-.JACK- SPECIFICATION formingpart of Letters Patent No. 779,577, dated January 10, 1905. Application tiled February 5,1904- Serial No. 192,095.

To 1.77 Who/1t it my f'o//w/fl'n.'

Be it known that. l. Joux (I. lLiivNnr, a citizen ofthe UnitedStates, residing' at A\'ewark, f

in the county of Essex and State ot' New Jersey, have invented and produced a new and useful improvement in Lifting-Jacks; nd I do herehy declare the following' to he a full, clear. and exaet descri] such as will enahle others skilled in thi art )tion of the inventim'i, j

to which it appertains to make and use the, E same. reference heing' had to the accoinpnnying' drawings. and to lignres of reference marked thereon. which forni a part of this specitieation.

The objects of this invention are to reduce the cost oi' constructing' lifting-jacks. especially those adapted for raising' heavy vehicles to permit the removal, lula'ieation. or other manipulation of the wheels, to .secure a strong' and durahle and vet simple construction. and to ohtain other advantagesl and results, some of which may he referred to hereinafter in connection with the description of the working' parts.

r1`he invention consists in the improved lifting-jack and in the arrai'igements and conihinations of parts of the same, all Substantially as will he hereinafter set forth, and linally embraced in the clauses of the claim.

"eferring to the accompanying' drawings. in which like ligeros of reference indicate eor- Figure 1 is a side elevation of the `improved working' 21 of the handle or key 25.

and other parts have their hearings. Said head-piece 12 provides an integral `box 14 at one side fora gear-wheel 15 and also bearings 1t, t'or a worm-shaft 1T, which latter meshes with the gear-wheel 15, as shown in Fig'. 1, to cll'ect a slow turning' of the same.

'lhe gear-wheel 15 is seated on the shaft 1S. heing' provided with an angular central aperture to receive a correspondingly-shaped portion 19, Fig'. l. of said shaft. Said shaft 1X is preferahly a casting', and next to said angular portion thereof it is provided with radial teeth, forming' a pinion 2l), to engage the rai-k 12),. the said pinion 2l) being preferably smaller in diameter than the gear-wheel 15. 'l`he opposite ends ot' the shaft 18 lie loosely in Alwaring's formed at the opposite sides of the box 14. the openings or receptacles 21 for said shaft ends heing larg'er in diameter than said ends and of peculiar conformation, as iinlicated in Fig'. 5, to permit the operations liereirnil'ter descrihed.

The hearingsl 1U for the worm or screw shaft are arranged or disposed so that said shaft lies at an outward and upward inclination from the line of the rack, and said shaft is provided with an angular aperture 23, Fig'. 2. to receive the correspondingly-shaped end The outermost hearing' 1o for the screw-shaft is preferably a hollow screw 26, `separable from the headresponding' parts in each of thesevcral figures.

)ieee and ada )ted to he removed to )ermit l f the insert ion or arrangement of the said screwder'ice, partly broken away to show therela`` l l l vices are operated. Fig. 4 isa detail edg'e view ot a certain gear-wheel and connections, the .f

functions of which will he hereinafter fully explained;- and Fig'. illustrating' one of the hearings for said gearwheel more clearly.

ln said drawings, 1t) indicates the base on which the device may stand: 11, a tubular vertical extension of l"aid base. which may he inte,f,iall,\v cast or otherwise f-orn'iected thcre- With and which is provided with a head-piece 5 is a detail side View shaft upon its said hearings. v

'lhe relation ofthe loose shaft 18 and its gear-wheel to the screw-shaft 17 and the vertical rack 13 is such as to permit the rack 13 to slide vertically in its slideways or bearings in the head 12 independent of the screwshaft, an uplift of said rack causing a rise and lateralLv-outward movement of the shaft 18 in its open bearings, so that the teeth of the pinion 20 are withdrawn from between the teeth of the rack. Thus the operator may quickly raise the head-piece 300i' the rack into Contact with the, article to be raised. After thus raising the said, rack the weight of the movable parts causes the same to automaticy all y assume their relative operative positions 12, 1n which the vertically-sliding' rack 1?),

handpiece in its socket in the screw-shaft the construction without departing from the spirit and scope of the invention, and consequently I do not wish to be understood as limiting myself by all the positive descriptive expressions I have above employed, excepting as the state of the art may require.

Having thus described the invention, what I claim as new is- 1 The improved y lifting-jack herein described, comprising a stand having a vertical slideway for a rack and bearings for a screwshaft and bearings for a shaft having a gearwheeland pinion. the bearings for the last said shaft permitting a movement upward and away from the rack, a screw-shaft and means for 'turning the same, a shaft having a gearwheel and pinion, the gear-wheel meshing with the said screw-shaft and the pinion moving on its shaft with said gear-wheel and meshing with the rack, and said rack arranged in said slideway, substantially as set forth.

2. The improved lifting-jack herein described, comprising a stand having a slideway for a rack and bearings for a screw-shaft and bearings for a shaft having a gear-wheel and pinion the bearings for the last said shaft peri niitting a movement away from the racli', a screw-shaft and means for turning the same in its bearings, a shaft having a gear-wheel 1 meshing' with said screw-shaft and also having a pinion moving thereon with said gear-wheel, said pinion normally meshing with the rack, and said rack arranged in said slideway.

3. The improved lifting-jack herein de-i scribed, comprising a stand having a slideway for a rack and bearings for a screw-shaft and bearings for a shaft having a gear-wheel and pinion, the bearings for the last said shaft permitting a movement away from the rack, an upwardly-inclining screw-shaft and a shaft havingagear-wheel and pinion the gear-Wheel meshing with the screw-shaft and moving with the'pinion and the pinion normally meshing with the rack, and means for turning the screwshaft, substantially as set forth.

4. The improved liftingjack herein described. comprising a stand having a slideway for a rack and a box for inclosing a gear-wheel, pinion and screw-shaft, a rack, an inclined screw-shaft in said box, a gear-wheel arranged above said screw-shaft and adapted to move upward and away from said screw-shaft, and a pinion movable with said gear-wheel and adapted to engage and move away from said rack to permit the latter to slide upward in its bearings, substantially as set forth.

` The combination with the stand having a vertical slideway for a rack and a box for iii- 'closing a pinion, gear-wheel and screw-shaft,

said box providing bearings for an inclined screw, the outer bearing of which is a hollow screw separably arranged in the walls of the box, of said rack, an inclined screw-shaft, and a shaft movable in a direction away from the rack and having a gear-wheel engaging the screw-shaft and a pinion engaging the rack, and means for turning the screw-shaft and raising said rack, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 18th day of January, i.

JOHN (l. BLEVNEY. VitneSSeS: f

CHAiiLics H. PELL, RUssELL M. Evisiinri.

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