US543407A - Earl sherwood and lorenzo lake - Google Patents

Description

(No Model.)

B. SHERWOOD -& L. LAKE. LIFTING JACK.

No. 543,407. Patented July 23, 1895.

UNITED, STATES PATENT OFFICE. v

EARL SHERWOOD AND LORENZO LAKE, OF HONESDALE, PENNSYLVANIA,

ASSIGNORS OF ONE-HALF TO WALTER A. WOOD AND N. E.BIGELOW,

OF SAME PLACE. A

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent N 0. 543,407, dated July 23, 1895.

I Application filed March 5, 1895. Serial No. 540,646. (No model.) 7

To all whom it may concern.-

Be it known that we, EARL SHERWOOD and LORENZO LAKE, citizens of the United States, residing at Honesdale, in the county of Wayne and State of Pennsylvania, have invented a raised position after the operating-lever has been depressed, and which shall be simple in construction and durable in practice.

Our invention consists in the combination with an inclined post or standard provided with a broad base having a triangular extension for giving the necessary strength thereto, of a lifting arm or bar pivoted to the post or standard, and having a corrugated face-plate,

an operating-lever also pivoted to said inclined standard, andan open link interposed between the lifting-bar and the operating-lever, and provided with a stop for limiting the upward movement of the operating-lever, and in certain details of construct-ion and arrangement of parts hereinafter described and claimed.

In the accompanying drawings, Figure lis a perspective view of our improved wagonjack complete. Fig. 2 is a side elevation of the same with one side bar of the open link omitted to show the relation of the parts and the means for automatically locking the lifting-bar in its raised position.

Similar numerals of reference indicate corresponding parts in both figures of the drawlngs.

1 represents the base of our lifting-jack, which has sufficient length and width to properly steady the jack and hold it in an upright position. v

2 indicates a triangular extension projecting upwardly from the base 1 and adapted to receive and support an inclined postor standard 3 bolted thereto, as shown. We prefer to make the inclined post or standard 3 of two parallel bars adapted to stride and embrace the triangular extension 2 of the base, and to .oted thereto by a bolt 7.

8 indicates an open link consisting of two separate and substantially-parallel side-bars, as shown in Fig. 1. The link 8 pivotally connects the lifting-bar 6 with one end of the opcrating-lever by means of the through-bolts 9 and 10. a

11 indicates a face-plate made of soft iron or other suitable metal, capable of being bent -to form at suitable intervals corrugations or teeth, the purpose 'of which is. to engage the axle or other convenient point of a vehicle and prevent the same from accidentally sliding therefrom. The face-plate 11 may be screwed or otherwise secured to the upper side of the lifting-bar 6.

12 is a stop in the form of a small plate or cross-bar secured upon the upper faces of and connecting the two side bars of the open link 8.

The operating-lever 4 is made to project at its end beyond the pivotal bolt 10 to such extent that when the parts are .caused to assume the position indicated in Fig. 2, the raised position, said projecting-end of the opcrating-lever 4 will rest against the lower face of the stop 12 and bar 6, thereby limiting the further progress of the lever 4.

The parts of our lifting-jack, and the angles thereof with relation to each other, are so arranged that the pivot 10, when the bar 6 is raised to its highest position, will be out of line with and above the line of the pivots 5 and 9. By such arrangement it will be evident that it is impossible to depress the lifting-bar 6, thus obviating accidents, damage to the vehicle, and loss of time incident to lifting-jacks incapable of being locked in raised position.

By means of the construction above described, a simple and durable lighting-jack is provided, which is adapted for use in connection with the lowest barouche or the highest lumber-wagon. It will-also be apparent that the device Will be doubly and automatically locked in its raised position by means of the stop 12 and the engagement between the end of the operating-lever and the lifting-bar.

Having described our invention, we claim In a lifting jack, an elongated base, and an inclined post or standard secured thereto, in combination with a lifting bar pivoted to said post or standard, a corrugated plate secured to the upper face of the lifting bar, an operating lever also pivoted to said post or standard, an open link comprising two side members disposed upon opposite sides of and pivotally connecting the lifting bar with one end of the operating lever, and a stop in the form of a plate or cross bar connecting the side

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