US308643A - Lifting-jack - Google Patents

Description

' 2 Sheets -'Sheet- 1. D. TRUE.

LIPTING JACK.

(No Model.)

Patented Dec. 2, 1884.

INVENTEJR WlTil E J 2 Sheets-Sheet- D. TRUE.

LIPTING LTAGK.

(No Model.)

Patented Dec. 2, 1884.

INVENTUR- Q N, Pnaas, FhMn-Ulhngnplwr. Washington. a. a

Nrrnn STATES PATENT rricii,

LlFTiNG-JACK SPECIPICATIQEE forming part of Letters Patent No. 308,643, dated December 2, 1884.

Application filed May 26, 1884. (No model.)

To aZZ whom it may concern:

Be it known that 1, DAVID TRUE, of Salisbury, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in LiftingJacks, of which the following is a specification.

In the accompanying drawings, in which similar letters of reference indicate like parts, Figures 1 and 2 are side elevations of my improved lifting-j ack. Fig. 3 is a sectional view of the operative portion. Fig. 4 is a perspective view of the pedestal detached. Fig. 5 is a horizontal section on line as, Fig. 1. Fig. 6 is a horizontal section on line 1, Fig. 1.

This invention relates more particularly to that class of lifting-jacks adapted for use in connection with carriages and wagons; and it is so constructed that it may be placed beneath the axle, between the wheel and carriage or wagon body, and operated by a person standing erect outside the wheel. The jack may be placed in position, operated, and removed without any necessity for stooping or getting behind the wheel, or danger of soiling the clothing or person.

A represents a post or standard secured to and supported by a pedestal consisting of the horizontal piece B and legs 0 D." The legs 0 are provided with two feet, 0, or points of contact with the ground, said feet being at the outer ends of said legs. The legs D are provided with one foot, D, or'point of contact with the ground, centrally situated, as shown; hence the pedestal rests upon the ground at three pointsviz., the two feet 0 and the foot D. The outer feet, 0, are produced by removing material from the leg at the central portion, 0', and the central foot, D, is produced by removing material from the leg at the outer portions, D. There are three results produced by this method of constructing a pedestal-first, as there are but three points of contact with the ground, it has the advantage on a rough or uneven surface possessed. by a tripod; second, it has, practically, the use of four feet or points of contact withthe ground when liable to fall, as the portions D of the leg D are but slightly raised; and, third, owing to the relatively long connecting-bar B and the shape of the legs, when it tips and falls it will always fall sidewise, (not cornerwise, as in case of a tripod,) thus protecting certain of the operative portions of the jacksuch as the lifting-lever.

The post A may be secured to the pedestal in any suitable manner. In this case it is secured by means of rivets, a, passing through the outer plates, b, the bar B, and the post A, which straddles the bar. Additional strength is secured'by means of the braces d.

E is the lifting-bar, provided with the foot or hook E, and held next the post A by means of guides F and G, said guide F consisting of a strap secured to the post and passing around the lifting-bar, and the said guides G consist ing of bent metallic pieces of the shape shown, (see Fig. 5,) secured to the post and extend ing into vertical grooves e in the lifting-bar.

H is a rack-bar pivoted at H to the liftingbar E, and provided with the teeth H near its upper end. i

I is a socket sliding upon the rack-bar and provided with the pawl J, pivoted at J thereto and held in the teeth by means of the spring K. The rack-bar H is provided with a depression or thumb-place, h, and the pawl J is provided with a thumb place, f, for convenience in handling. The short arm L of the lifting-lever L ispivoted at Z to the projection 1, extending from the socket I, said liftinglever being fnlcrumed at g in the parallel bars or uprights N, bolted to and extending upward from the post A. These bars are provided with holes a for convenience in hanging up the lifting-jack. They are also provided with rubber blocks or buffers 19, secured horizontally to the outer sides of the bars N by springing their shanks 1 into beveled rings N, or by any other suitable means. The object of these buffers is to ease the blow when the lifting-jack tips over sidewise, as will always be the case, owing to the shape of the pedestal, as above described.

S is a spring extending from the upper end of the post A, and bearing against the under 'side of the short arm Lof the lifting-lever L,

as shown in Fig. 3; and U is astop -pin or rest extending horizontally from one of the uprights N beneath the short arm of the lifting-lever. The object of the spring S is to hold the short arm L a little above the pin U, upon which it would otherwise rest, for the purpose below stated.

The operation of the device is as follows: The liftingjack is placed between the wheel and carriage-body, with the foot or hook E under the axle which is to be raised. The rack-bar H is then raised by placing the thumb and finger in the depressions it until the foot or hook E touches lightly the under side of the axle, the position being that shown in Figs. 1 and 3. The axle is then raised by hearing down the long arm L of the liftinglever, the short arm of course lifting the socket 1, and by means of the pawl J, the rack-bar H, and'lifting-bar E, the position assumed be ing that shown in Fig. 2. The axle is then dropped by raising the liftinglever so that the device is in the position shown in Figs. 1 and 3, and the lifting-jack is readily removed from its position under the carriage-axle by raising the long arm of the lifting-lever L un til the short arm L, bearing down the spring S, rests against the projection U. This leaves an appreciable space between the foot E and the axle, so that the jack may be removed from under. the axle with facility, without catching or crowding either the axle or the ground.

The operator, during the entire process above described, stands outside the wheel, and is not obliged to stoop or get in behind the wheel for any purpose.

There are various modifications possible to my invention, two of which are shown in Figs. 7 and 8, which are respectively an elevation and a section on line 2, Fig. 7. These modifications consist, iirst, in applying the spring S at a different place, but producing the same result, and, second, in a slightlydifferent means for attaching the buffer P. The spring S is, in Figs. 7 and 8, riveted at 1 to the bar N, and bears upwardly against the pin 2, secured to the sliding socket I. The buffers 1 are held by fingers or prongs 3, extending from the bars N, and adapted to be bent over spring adapted when in its normal position to hold the lifting-bar and foot orhook slightly above its resting point, so that said bar and foot or hook may be pressed slightly down ward against the spring to remove the liftingjaek, substantially as and for the purpose set forth.

2. In a liftiugjack, the combination, with the post A and the short arm L of the liftinglever L, of the spring S, secured to said post and bearing against said short arm, substantially as and for the purpose described.

3. In a lifting-jack, the combination, with the post A and lifting-lever L, of the spring S, secured to said post and bearing against the short arm of said lever, and the projection or rest U, extending from the bar N under the short arm of said lever, substantially as and for the purpose set forth.

at. In a lifting-jack, the herein-described pedestal, consisting, essentially, of the horizontal bar 13, provided with the legs 0, having the two outer feet, C, and thelegs D, having the central foot, D, and their under sides removed at D, substantially as and for the purpose described.

5. The combination of the post A, bars N, provided with the beveled rings N, and the buffers P, provided with shanks P, substantially as and for the purpose set forth.

6. The combination of the post A, provided with the parallel bars N, lifting-lever L, pivoted at g to said bars, sliding socket 1, provided with the projection I and spring K, the pawl J, rack-bar H H, and lifting-bar E, pivoted at H to said rack-bar, and provided with suitable guides extending from said post A, substantially as and for the purpose described.

7. The con'ibination, with the lifting-lever L L and socket I, of the rack-bar H H, provided with the depressions h, and the pawl J, provided with the depressions f, substantiall y as and for the purpose set forth.

8. The combination of the post A, the guides G, of the shape shown, and the liftingbar E, provided with the grooves a, into which said guides extend, substantially as and for the purpose described.

' DAVID TRUE.

\Vitnesscs:

GEORGE XV. (Darn,

JHARLEs E. Howls.

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