US1047107A - Lifting-jack. - Google Patents

Description

H. s; & 0.1. NBATS.

LIFTING JACK. APPLICATION FILED JULY 5, 1912.

1,047,107, Patented Dec. 10, 1912.

2 SHEETS-SHEET 1.

v Patented: Dec. 10; 1912.

:WL/ N 3i:

NBATS. f LIPTING JACK.

APPLICATION FILED JULY 5 1912, 1,047, 1 O7.

mirra sTATns PATENT oFFioE.

HARRY S. NEATS AND CLARENCE P. NEATS, 0F 4EAST ORANGE, 'NEW J'ERSEY.

'LIFTI-NG-J'ACK.

`Specification of Letters Patent. Patented Dec, 1Q, 1912, Application filed July 5, 1912. Serial No. 707,786.

To all whom it may concern.'l

- Beit known that we, HARRY S. NnA'rs and CLARENCE P. NEATS, citizens of the Unitedy States, and residents of East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Lifting-Jacks, of which theof our invention is toprovide a lifting jack of great strength, easily and quickly operated but voccupying small space so that it may easily be carried in an automobile or similar vehicle and brought into use if occasion should require the lifting of an axle thereof to 4replace a tire or for any other purpose. WVe do not, however, limit ourselves to any particular size or to the application to any specific purpose, nor do we wish to limit our invent-ion to the particular construction lwhich is'here shown and described, as it -is obvious that more or less variation can easily be made by those skilled in the art, without depart-ing from the spirit and` scope of our invention.'

In the accompanying drawings, Figure 1 is a side elevation of a lifting jack constructed according to our invention; Fig. 2 is a front elevation of the samem; Fig. 3 is a transverse vertical section of thesa-me; Fig. 4 is an elevation of the lower part of the invention, showing the means by which the outer sleeve is fixed in an elevated position upon the standard, as hereinafter described;

Figs. 5 and 6 are detail views of a portion of themechanism; 'Fig'.Y 7 is a plan view of the operating handle; and Fig. Slis a perspective view of the jointed connection of the handle. `Figs. 5, 6, 7 and 8 are drawn to a scale larger thanv that` of Figs. 1, 2, -3 and 4.'

ln carrying ourinvention into effect in the embodimentthereof which i we have selected for thev purpose -of description and vinto laterally downwardly extending bends 16 (see Figs. 3 and 4). Theseslots are preferably two in number and -located at approximately opposite points in the wall of thetubular standard A. 14. Sldably mounted upon the standard 14 is an eX- terior member 17. This member 17 is provided near its lower end with lugs 18 in which are set studs 1 9, which project inwardly beyond the inner surface' of the lmember 17 and which slide in the slots l5 of the standard 14;- these lugs and studs are best shown in Fig. 3. Near the upper end of the member 17 is located an interior annular flange or shoulder 20 which, when the member 17 is in its lowered position, rests upon the top of the standard. 14.

Suitably journaled in the upper portion of the member 1( is a shaft 21', which bears near its vinner end, within 4the interior of the said member, a gear wheel 22. Located on a squared end of saidshaft, outside of the member, 17, so as to rotate with said shaft, but capable of sliding motion upon the same longitudinally thereof, is a ratchet 23, which engages witha. similar ratchet.

40 fast upon the [worin gear 24, which wornffgear is loose upon the round part of the shaft 21. This 'construction is shown in detail on a larger scale in Figs. 5 and 6. spring 25 (see Fig. 1) operates to keep these two ratchet-s normally*v in operative connection, but permits the ratchet 23to recede .from the ratchet 40 of the wormgear 24,

so as to permit said worm gear 24 to rotate freely on said'shaft. j

Suitably journaledl in the member 17, somewhat above ythe middle thereof, is a shaft 26 bearing a worm 27. The outer end of this shaft-26l is provided with a universal joint 28, in which is a squared socket 29 which is adapted to receive the square end of an operating bar 30 whichmay, if.

desired,.be.provided with a cross piece or handle 31.

Located within the, standard 14 is a rack barl 32, the upper end of which projects through an opening in the top of the said standard and through the member 17 and bears a rest 33. As shown more particularly in Fig..3, the gear-"wheel 22 is adapted lto engage with vthe, teethof this rack bar.

The operation of our invention is as follows: If the axle -or other object to be lifted by t-he jack is moderately low, so that the jack in its lowered position as shown in Fig. 2 will `reach conveniently near to the. axle, the jack is placedin position. The rack bar 32 is then raised by ha'nd until it touches lthe axle, the teeth of the ratchets 23 and 40 dls# engaging so -that the shaft 21 may rotate backward without rotating the worm gear vworm gear 24, which, acting through its ratchet 40 and the ratchet 23 and the shaft 21, causes the gear wheel 22 to elevate the rack bar 32 and thereby lift the object placed vupon the jack. Should the object to loe lifted be too high for the rack bar 32 to reach when the jack is in the lowered position shown in Fig. 3, the member 17 is raised, the studs 19 sliding up through the slots 15, and then, upon giving the member 17 a partial rotation or twist, the studs pass i into the upper bends 16 ofthe said slots and the member 17 is held in the elevated position as shown in Fig. .4; the bar 30 is then operated to elevate the rack 32 in the same manner as heretofore described. In' order to restore the rack 32 to its lowered position, the ratchet 23 is withdrawn from its engagement with the ratchet 40.

The advantages of our invention will be obvious from what has been above said. It will be seen that in using a jack constructed according to our invention the operating handle. can be bent or turned and operated from any convenient point, the handle being, for instance, put in between the spokes of a wheel,.`or turned toward the front or the rear or otherwise as desired.

Having thus described ourinvention, what we claim as new and desire to secure by Letters Patent, is as follows:

1. A lifting jack, comprising in combina- -tion a standard, a stem slidably mount-ed in said standard, a rack onsaid steml` a shaft rotatably mounted in said standard and provided with a gear adapted to engage with said rack, the outer end of said shaft being square-ended and bearing a ratchet mount.- ed thereon and adapted to slide longitudinally thereof, a gear loose on said shaft inside of said square-end provided with a ratchet adapted to engage with said first mentioned ratchet when the two ratchets are placed in operative contact with each other, a second shaft rotatably mounted onsaid standard and provided with a worm adaptto engage with said last named gear, and means adapted to rotate said second shaft.

2. A lifting jack, comprising in combination a standard, a stem slidahly mounted in said standard, a rack on said stem, a shaft l 'l rotatably lmounted in said standard and provided with a gear adapted to engage with said rack, the outer end of said shaft being square-ended and bearing a ratchet mounted thereon and adapted to slide longitudinally thereof, a gear loose on said shaft inside of said square-end provided with a ratchet adapted to engage with said first mentioned ratchet when the two ratchets are placed in operative contact with each other, a spring adapted to normally hold said ratchets in operative engagement, a second shaft rotatably mounted on saidstandard and provided with a worm adapted to engage with said last named gear, and means adapted to rotate said second shaft.

3. A lifting jack, comprising in combination a standard, a telescopic sleeve slidably mounted upon said standard, a stem slidahly mounted in said standard, a rack on said stem, a shaft rotatably mounted in said standard and provided with a gear adapted to engage with said rack, the outer end of said shaft being square-ended and bearing a ratchet mounted thereon and adapted to slide longitudinally thereof, a gear loose on said shaft inside of said square-end provided with a ratchet adapted to engage with said first mentioned ratchet when the two ratchets are placed in operative contact with each other, a second shaft rotatably mounted on said standard and provided with a worm adapted to engage with said last named gear, and means adapted .to rotate said second shaft.

4. A lifting iack, comprising in combinatien a standard, a telescopic sleeve slidably mounted on said standard, a stem slidably mounted in said standard, a rack on said stem, a shaft rotatably mounted in said stanti-ard and provided with a gear adapted to engage with said rack, the outer end of said shaft being square-ended and bearing a ratchet mounted thereon and adapted to slide longitudinally thereof, a gear loose on said shaft inside of said square-end provided with a ratchet adapted to engage with saidfirst mentioned ratchet when the two ratchets are placed in operative contact with each other, a spring adapted to normally hold said ratchets in operative engagement` a second shaft rotatably'mounted on said standard and provided with a worm adapted to engage with said last named gear, and means adapted to rotate said second shaft.

Tn witness whereof we have hereunto signed our names this 26th day of June 1912, in the presence of two subscribing witnesses.

' HARRY S. NEATS.

CLARENCE P. NEATS. Vitnesses:

ELIJAH Dominus, FRANK M. MUNN.

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