US1393851A

US1393851A - Jack

Info

Publication number: US1393851A
Application number: US336673A
Authority: US
Inventors: Herrbert A Thorndike
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-11-08
Filing date: 1919-11-08
Publication date: 1921-10-18
Anticipated expiration: 1938-10-18

Description

H. A. THURNDIKE.

JACK.

APPLICATION msu Nov. f1. 1919y RENLWH) FEB. 23,1921.

2 SHEETS SHEET Z,

Patented Oct. 18, 1921.

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Specification of Letters Entente'.

Patented @eto it,

Application tiled November e, loro, Serial ido. 55365513. Renewed rebrnary 23, 1921. serial No. Ef-$7,226.

VTo all w from if may concern:

Be it lrnovrn that l, Herinner A, 'llnionnorne, a citizen oi the United States, and a resident of iliashington, in the District of Columbia, have invented certain new and useful improvements in Jacks, of which the following is a speeilicetion.

My invention is an improvement in jacks, and has for its object to provide a device ot the character specified, especially adapted :for use with motor vehicles, and to be tached permanently in place on the axles, and to be normally ont oi' operative position, but capable of being brought into operirtion when desired, merely by the rnoveinent of the jaclr in its normal operation.

ln the drawings:

Figure l is :i side view of e portion o e motor vehicle provided with the improved isch, the jack being shown in operative posi tion, l

2 isa vertical section in a piene porallel with the erle,

Fig. 3 is a side view of the jock in inop erotive position,

ligs. d and 5 are sections on the lines 4rd, and 5 5 respectively, of Fig. 2.

'ln the embodiment of the invention shown, e. suitable casing is provided, the said casing)7 comprising a body l, which is substantinlly rectangular in cross section, the top beine; closed by la plete 2, While the bottorn is adapted to be closed by the foot 3 of the jack.

llt vvill be noticed that the casing l is of relatively great length, and relatively narrow width, and a screw d is journaled longitudinally of the casing at the top. This screw has intermediate its ends an annular groove 5, and a cross pin 6 held in the casing, engages the groove, to prevent longitudinal movement of the screw.

The ends of the screw are oppositely threaded. es clearly shown in Fig. 2, and upon each of the said ends there is mounted a nut 7. Each of these nuts has on its'upper side an undercut rib 8, and these ribs engage within a similarly shaped groove 9 in the top of the casing, to guide the nuts and to prevent downward vmovement thereof with respect to the casing, when the screw is turned.` lt will be obvious that when the screw is turned the nuts will be moved toward or from each other, in a direction depending upon the direction of motion of the screw.

Esch nut 'l' has a pair of depending,u luge l0 at its outer end, the said lugs being spaced apart -lirorn eoch other, and a system, of lazy tongs l1 is pivoted to' the logs. rllhe system of lazy tongs is oivoted et its lower end to the tootB before mentioned, and at the center of the seid foot, and'the lazy tongs is composed of levers pivotally connected to each other the nuts end in snch inenner that when thenuts are moved together the systeni as a whole is elongated, While when the nuts are nioved apart the system is shortened. Thos when the nn'ts .are rnoved together, the `loot 'ivill be moved away from the screw, ivhile when the nuts nre rnoved apart, the oot vvill he moved toward 'the screw, and when the systern is `fully contracted, the floot abutsagainst the lovver edge of the casing and closes the seine.

ln order 'to turn the screw to operate 'the lazy tongs e Worin Wheel l2 is secured to extended end oi3 the screw, and this rvorrn Wheel meshes with a worin 13 on o driving shaft to which the Worin is keyed. llhis driving shaft lll has one end polygonal as shovvn at l5, lor engagement by a wrench or the like to turn the shaft. The driving mechanism for the screw namely the vorm Wheel, ivorrn and shaft lll are arrenged in an auxiliary housing 16, which is detachably connected to the casing 1,*to permit its removal to inspect the Worin gearing.

While it is obvious that the improved jaclr may be used, and is suitable for use, in any connection Where a jack is desired, it is especially edapted Afor use with motor vehicles, to form a permanent attachment in connection with the vehicle. With vthis object in view l arrange a jack at each corner of the vehicle, that is near each end of each axle. ln order to connect the jack to the axle, l provide in connection with each casing a sectional bearing, consisting of e section 16 rigid with the casing, and s section 17 detachably connected with the section 16, as indicated at 18. The sections 16 and 17 are adapted to embrace the 4rear axle housing and the front axle, and the bearings are shaped to lit housing or axle as the case may be. lln the present instance the bearf ings are shaped to fit the housing. @nce 1n place, the jacks may be so left, they being of such size that they will be inconspicuous, depending but slightly below the axle housing or axle as the case may be` The relative the foot,

proportion oi axle housing and jaclr is indicated in l41 ig. l. When it is desired to use the gaelr, a suitable tool may be engaged with the polygonal end l5 ot the shatt 14, to rotate the shaft in a direction to extend the lazy tongs. rlhe toot 3 is moved downward and will engage the ground smoothly, re-

y of the intermediate series, which are single,

and a little less than twice the thickness of a member of the first named series.

l claim:

l. A jaclr of the character described comprising a substantially rectangular casing open at its bottom and carrying at one side clamping means engageable about the axle of a vehicle, an extension formed at one end of the upper portion of the casing, a shaft journaled through the upper portion of the casing and the extension, said shaft being oppositely threaded adjacent its ends and being limited to rotary movement, the underside of the top of the casing being formed insonni with a guide groove, nut members slidable along said groove and engaged upon the threaded portions of said shaft, a lazy tongs having the ends ot its uppermost links connected with said nut members, a toot member connected with the lowerrnost links of the lazfzyitongs.Z and means for turning said shaft comprising a worm wheel secured thereon within said extension, a shaft journaled through said extension at right angles to said threaded shaft and having one end formedfor engagement by ahandle, and a worm on said second named shaft meshing with the worm wheel,

2. A jack of the character described comprising a substantially rectangular casing open at its bottom and carrying ab one side clamping means engageable about the axle of a vehicle, a shaft journaled through the upperdportion ot the casing, said shaft being oppositely threaded adjacent its ends and being limited to rotary movement, the underside of the top of the casing being Jformed with a guide groove, nut members slidable along said groove and engagedv upon the threaded portions ot said shalt, a lazy tongs having the ends of its uppermost links connected with said nut members, a foot member connected with the lowermost links 'of the lazy tongs, and means for turning said shaft.

HERBERT A. THRNDlKE.