US306943A - Lifting-jack - Google Patents

Description

(No Model.)

W. K. MOTTRAM-& J. A. M'UNDY. LIFTING JACK.

Patented Oct. 21, 1 884.

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lUnrrnn S rarns XVILLIAM K. MOTTRAM AND JAMES A. MUNDY, OF OTTAW'A, KANSAS.

LlFTlNG-JACK.

iziPECIPICATIQN forming part oi Letters Patent No. 306,943, dated October 21, 1884.

Application tiled August 30,1854. (No model.

To a5} whom it may concern Be it known that we, WILLIAM K MOTTRAM and James A. MUNDY, citizens of the United States, residing at Ottawa, in the county of Franklin and State of Kansas, have invented certain new and'usefnl Improvements in Lifting-Jacks. of which the following is a specification, reference being had to the accompanying drawings.

This invention has relation to liftingjacks, and is designed as an improvement upon the invention described in the Letters Patent granted to us April 1, 1884.

.iheimprovement. consists in so arranging or 'hinging one of the branches of the standard as to permit a quick and easy removal of the power-lever and adjustment of the same, with relation to the standard, and. in combination with the said hinged branch, of means for locking the same at the upper end of the stan vard when the powericver has been adjusted, and in other details of construction, all as will be hereinafter more fully set forth and claimed.

In the accompanying drawings, to which similar letters of reference are made indicating corresponding parts, Figure 1 is a representation of onrimproreijl lifting-jack in a perspectlve view. Fig. 2 is a perspective view of the loop-dog removed from the jack; and Fig. 3 is a view of the standard, showing the hinged branch let down for the adjustment of the lifting or power lever.

Referring to the said drawings by letter, A indicates the standard, having the brace a and the upper portion bifurcated, as shown at B. One of the branches of the bifurcation (preferably the right-hand one) is cut off a short distance below the base I) of the opposite branch, and is hinged to the vertical side ofthe standard, as at O, the portion 1) serving as an engagement or stop for the said hinged branch, and both the fixed and hinged branch are provided ontheir inner sides with opposite recesses d, to receive the laterally-projecting pin of the hand-lever. The upper end of the fixed branch 0 of the standard is provided with a transverse bolt, E, carrying a jamblock, F, of sufficient thickness to permit a free and easy movement of the hand-lever between the branches. This boltE may be also threaded at its opposite end, and is designed to pass through a transverse perforation at the upper end of the hinged branch, whereit may be connected by a nut or other suitable fastening device.

While we have shown a bolt and nut for connecting the hinged branch to the fixed one, it is obvious that various devices-such as a band or clam pmay be used without departing from the spirit of our invention.

\Vhile the loop-dog is of a construction substantially similar to the one shown in our patcut above referred to, we desire to attach the arms to the rear upper s de of the standard branches by means of staples or the like, and

the right-hand branch of the loop, or that one so that the same may be readily connected to and disconnected from the said hinged branch during the operation of adjusting the handlever. Thus it will be perceived that the operation may be both rapid and effective, as it is only necessary, after loosening the bolt at the top of the standard, to pull the hook-arm of the loop-dog from the staple in the hinged branch of the standard, after which the said branch may be let down upon its hinge and the lever raised or lowered to the desired recessed bearings. The hinged branch is then thrown up, the loop-dog attached, and the nut applied to the top bolt when thejack' is again ready for use. The forward recessed end of the power-lever is faced with metal, (shown at at G,)having its vertical portion g extending slightly above the upper longitudinal surface ofthe said lever, to prevent a vehicle or other deviee, when engaged thereby, from sliding rearwardly thereon;

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. A lit'tingjack having ahinged branch adapted to cooperate with a fixed branch to support a power'lcver, substantially as specified.

-2. The combination, with the standard having a vertical branch or extension provided on its inner side with recessed bearings, of the parallel hinged branch having similar recesses to receive the lateral pin ot the power-lever, and means for connecting the respective branches at their upper ends. substantially as specified.

3. The combination. with the standard, constructed as deseri bed, 0 l'the hi nged hranch having its upper end trans ersely perforated. and the belt at the upper end of the fixed branch carrying a jam block and nut, substantially as shown and specified.

4. The combination, with the standard ha-V- f ing the hinged branch, and means l'ercenneee ing the same to the fixed branch. of the loopdeg having its forward ends connected to the upper end of the respective branches of the standard, the arm of the loop connecting" with the hinged branch being adapted to disconnect readily in adjusting the power-lever, sub stantially as specified.

In testimony whereof we all'u; our signatures in presence of witnesses.

YVILLTAM K. MOTTRAM.

J AMES A. D'IUND'Y.

Witnesses:

Jenn P. LAInin,

DEVON,

Jenn P. .llm'lun, Jr.

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