US686745A - Wagon-jack. - Google Patents

Description

No. 688,745. Patented Nov. l9, I90l.

' F. P. LUTZ.

WAGON JACK.

(Application filed May 18, 1901.)

(No Model.)

UNlTED STATES PATENT OFFICE.

FRANKLIN PIERCE LUTZ, OF MILLHALL, PENNSYLVANIA.

WAGON-JAG K.

SPECIFICATION forming part of Letters Patent No. 686,745, dated November 19, 1901.

Application filed May 18, 1901.

T0 aZZ whom it may concern:

Be it known that LFRANKLIN PIERCE LUTZ, a citizen of the United States, residing at Millhall, in the county of Clinton and State of Pennsylvania, have invented a new and useful Wagon-Jack, of which the following is a specification.

This invention relates generally to liftingjacks, and more particularly to that class thereof known as lever lifting-jacks.

The object of the present invention is to provide an exceedingly simple, durable, and inexpensive form of lifting-jack which can be quickly and easily adjusted beneath the object to be lifted and one which will be steady and safe in operation.

Another object of this invention is to provide a lifting-jack in which the strain will be evenly distributed and one in which the looking of the parts after adjustment will be entirely automatic; and a still further object is to provide a lifting-jack which will avoid the use of pawls and ratchets and still be capable of a multiplicity of adjustments.

With these various objects in View the invention consists, essentially, in the employment of an upright standard carrying an operating-lever and a lifting-bar connected to said lever by means of a pivoted link, a supporting-bar adjustable upon the lifting-bar and having a bearing against the standard, and a clutch-bar attached to the lower end of the lifting-bar and adapted to engage the standard for the purpose of locking the lifting-bar in its adjusted position.

The invention consists also in certain details of construct-ion and novelties of combination, all of which will be fully described hereinafter and pointed out in the claims.

In the drawings forming part of this specification, Figure 1 is a perspective view of a lifting-jack constructed in accordance with my invention. Fig. 2 is a side elevation, partly in sect-ion. Fig. 3 is a detail perspective showing the end of the lever and the link connected thereto. Fig. 4 is a top plan view of the supporting-bar, and Fig. 5 is a similar View of the clutch-bar.

In carrying out my invention I employ a suitable base A, upon which is mounted the upright standard 13, said standard being bi- Serial No. 60,894. No model.

furcated at its upper end, as shown at B, and pivoted in the bifurcation is the operatinglever O, the short arm of the lever being curved downwardly, as shown at O, and pivotally connected toa link D, the opposite end of said link being pivotally connected to the lifting-bar E, which is arranged parallel to the upright standard B.

The lower end of the lifting-bar E is pivotally attached to the forward end of the clutchbar F, said clutchbar having an opening F, through which the upright standard passes, and the forward edge of the opening is beveled, as shown at F to provide a sharp edge, which is adapted to bite into or bind against the forward face of the upright standard B. A supporting-bar G is adjustable vertically upon the lifting-bar E, said bar having an opening G, through which the lifting-bar passes, and the forward edge of this opening is beveled, as shown at G to provide a cutting edge adapted to bite into or bind against the forward face of the lifting-bar E. The supporting-bar G is also providedwith a rearwardly-extending handle portion G ,by means of which the suppo'rtingbar can be quickly and easily adjusted up or down uponthe lifting-bar, and the shoulderG bearing against the upright standard, serves to guide the supporting-bar in its movement and also serves to steady said bar when weight is placed upon the end of the supporting-arm.

In operation the supporting-bar is adjusted beneath the axle or other object to be elevated, and the lever is then thrown down, causing the lifting-bar to be elevated, and inasmuch as the weight or strain is upon the end of the supporting-bar G the sharp edge G will bite into or bind against the liftingrod and will of course be moved up with the said rod. After the supporting arm or bar has been moved up to a desired extent the lever is released, and the strain being coinmunicated to the clutch-bar F through the lifting-bar E the beveled edge F will bind into the standard and hold the lifting-bar in its elevated position.

In practice I prefer to construct my liftingjack of spring metal; but it will of course be understood that certain of the parts may be made of wood, if sodesired. The clutch-bar is also formed with a handle portion F so that said bar can be thrown out of engagement with the standard Whenever desired.

It will thus be seen that I provide an exceedingly simple, strong, and durable liftingjack which can be quickly and easily oper 2. The combination with the upright standard, of the lever pivoted to the upper end thereof, a lifting-bar pivotally connected to the end of the lever, a supporting-bar movable upon the lifting-bar and having a guiding-shoulder bearing upon the upright standard, and a clutch-bar working upon the standard and pivotally connected to the lower end of the lifting-bar, substantially as shown and described.

3. The combination with a base having an upright standard, of the lever pivoted to the upper end of the upright standard, a clutchbar through which the standard passes, the opening in the clutch-bar having a beveled edge adapted to engage the upright standard, a link pivoted to the lever and a lifting-bar pivoted to the link, and a supporting-bar having an opening through which the lifting-bar passes, the edge of said opening being beveled to engage the lifting-bar, said supporting-bar having a shoulder adapted to engage the standard, and also provided with a handle for easy operation, substantially as shown and described.

FRANKLIN PIERCE LUTZ.

Witnesses:

JOSIAH R. FoX,. ADAM 0. Luv.

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