US1742559A - Jack - Google Patents

Description

Jan. 7, 1930. c; E. RICE JACK Filed De. '7. 1926 f m. me W@ D" L a Q W G O m Vf... u.. lumi W 2 0- v O ATTORNEY.

Patented Jan. 7, 1930 [UNITED STATES PA'rsNrorrics v cAaaa/mcaorrorm mus l c My invention relates to improvements in jacks. The object of m a jack that is attac hicle.

A further object of my invention is to provide a jack that will function without placing the up er'end beneath the axle.

A still urther object of my invention is -l vto provide a 'ack that can be operated under unusual conditions such as in mud, Sandor the like when the axle is in close proximity to the surface rendering it diiiicult to lace an ordinary jack between the axle an the M ground.

A still further object of my invention is to provide a jack that can be attached ad]acent to one or all of the wheels of the vehicle.

These and other objects will hereinafter be more fully explained.`

Referring to the drawingsl: u Fig. 1 is an elevation of the )aclras applied, parts removed for convenience of illustration. Fig. 2 is a transverse View of Fig. lapartly in section for convenience of illustration.

Fig. 3 is a transverse view of the screw attaching means.

Fig. 4 is a side view of the drum and housing showing the spring actuating means for the drum. n

Fig. 5 is a view showing the )ack in its operative position on the rear axle of an automobile.

.7 n invention is to provide shown in Fig. 1.

The mechanism herein disclosed consists of a clamp 1 the form of whichwould apply to the rear axle of an automobile; other forms will be made to suit the shape of other axles. The saidclamp is made in. two parts A and B, the said arts being rigidly connected by means of bolts 2 engaging throu in the outer turned ends of the c amp. ntegral with member B is a hanger 3 t o which are pivotally connected the expanding and retracting members 4 by means'of a .bolt 3', the said members having a block 5 ipivotally enga ing in the upper ends thereo and remova le by means of a member 6 which is .50 rigidly attached to the members 4 as'shown ed to the axle of the ve- Fig. 6 is a transverse view of the pawl4 h apertures in Fig.l 3.` The said blocks have apertures 7 concentrically positionedand threaded to receive a threaded screw 8. The threads on said screw are right and left handed so that when turned the members 4 will move to or from each other.

On the opposite ends of the members 4 are pivotally connected a series of hars 4', and at 'the lower end thereof pivotally connected is a foot plate 4.as a bearin on the ground. As an actuating means for igiefsaid screw I have centrally positioned a drum 9 having two peripheral grooves 10 as shown in Fig. 1. The said groovesare adapted to receive cords 11 and 11 as rotating means therefor for the pulrlpose hereinafter described.

oused within the drum is a pair of toothed members 12, the said members formed to rigidly engage at their center the square portion C of. the screw member 8. Rotation of the toothedmembers 12 is thereby transmitted to the screw 8. The teeth on said members extend in opposite directions as shown in Fi 2 to engage with a pawl 13 adapted to alternately drive the screw in opposite directions as hereinafter described.

The drum is hollow and has one side removed as a convenient. means to assemble or remove the toothed members. The said drum is inclosed by a housing 14 in whichit is rotatably Vcarried on the said screw 8, the housing being prevented from rotation by means of a le 15 having a slot 16 centrally and longitu inally ositioned as shown in Fig. 1, the said s ot engaging with a screw 17 which threadedly engages .in the head of thebolt 8. By this arrange-= ment the drum is free to move vertically when the members 4 are expanded and retracted. The drum being free to rotate on the screw is tensioned in a certain osition by means of springs' 18, the ends o which are attached to the housing as at D. The opposite ends are attached to thev drum as at E. Note that the springs extend in op osite directions so that the tension thereo will retract, the drum after being rotated by pulling the cords lland 11. The said cords are wound on the drum in opposite directions connecting with the pin 19 transversely ex- 100 tending from the pawl, the pawl being pivotally connected to the drum by means ofa pin 20 so that by drawing either of the cords the pawl will be rocked to engagement with its respective toothed member rotating .the screw accordingly. It will be understood that the cords when drawn will slip on the face of thedrum suiiicient to rock the pawl to ,engagement pre aratory to rotating the screw in the pre full extent of the revolution and release the springs will cause the drumv to retract as heretofore described. By repeating the pull on theA saine cord the screw will revolve in one continuous direction.

As a means to actuate the pawl from en# gagement with both of the toothed members simultaneously I have provided springs 21 to engage therewith as shown in Fig. 2, the said springs being rigidly attached to the peripheral wall of the drum to equally tension on both endsof the said pawl.

y Tooperate the mechanism herein disclosed it will be assumed that the automobile or other vehicle to which the jacks are attached is'mired, with the axle so near the ground that it would be impossible to place an ordi` nary jack such as commonly used, but when equipped with the jack as herein set forth, such diiiiculty will be obviated.

Toe'igage, the cord 11 is drawn outward .to theposition'shown at F in Fig. 5.` To dis-i engage, the cord 11 will be drawn outward which will retract the toggle members as shown at Gin Fig. 5.

The clamping means for the jack bein constructed as shown will render'it possi le to rock the jack to a horizontal position above the axle. y'However it is designed that the foot willretract'to a level with the under side of the axle.

When applied to the front axle which is of rectangular shape semi-circular members could be placed on either side of the axle permitting the jack to rock to a horizontal position in like manner to thatof the'rear.'

Such modifications may be employed as lie within the scope of the appended claims.

Having'thus' described my invention, what 1 I claim as newand desire to secure by Letters Patent is 1. In a jack, a right and left hand threaded screw having a square portion centrally positioned on the screw, a pair of toothed discs r fitted snugly on the square portion of the screw and rotatable therewith, the teeth of the discs extendingin opposite directions, a hollow drum havin drum rotatable on t e screw and housing the toothed -mei'nbers concentrically,- a toothed pawl pivotall connected and positioned in the drum, an a tensioning spring for each end ofthe' pawl respectively, the toothed members of the pawl positioned on a plane with theirrespective toothed discs and means erred direction. .When

one side removed, the

to rock the pawl simultaneously with the rotation of the drum to turn the said screw in either direction, a lazy tong having a foot plate pivotally carried on the outer or lower end, the two opposite end portions of the lazy tong havin a lpivotally .mounted block in each-thereo the blocks threadedly engaging on their respective end portions of the screw by which means the lazy tong is raised or lowered by the rotation of the drum, a housing for the said drum, the drum rotatably carried on the screw9 and in the housing a leg outwardly extending and connected to the periphery of the housing the leg being slotted to slidably engage on a headed screw positioned in thetop joint of the lazy tong by which means rotation of the said housing is prevented, leaf springs having one end attached to the housing and the other to the drum a'sretracting means for the drum as the ,screw is turned'. I

2. In a jack, a jack of the class described comprising a lazy tong and a right and left hand threaded element to expand and contract the lazy tong',l a pair of toothed wheels rigidly attached to the center of the screw, the teeth of said wheels extending in opposite directions, and a drum housing the toothed wheels and having annular grooves in the periphery thereof, the drum rotatable on the screw, and a pawl having toothedmembers extending in opposite directions and positioned to engagewith each of said toothed wheels respectively, the pawl pivotally carried by the drum and having a pin outwardly extending to receive cords, cords wound on the drum in opposite directions as rotating means therefor, the cords Ibeing attached to the pin of the pawl as rocking means for the pawl simultaneously with the rotation of the drum, a housing for the said drum, the drum rotatable` on the scre'w in the housing and the housing having a leg to englage with the y and the housingas retracting means for the drum to 'a normal position for the pawls engagement with the toothed wheels.

. i CARL E. RICE.

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