US193931A - Improvement in lifting-jacks - Google Patents

Description

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TIMOTHY R. DAY, OF DEVALLS BLUFF, ARKANSAS, ASSIGNOR OF TWO- THIBDS HIS RIGHT TO J. M. MCOLINTOOK AND'PAT. H. WHEAT, OF SAME PLACE.

IMPROVEMENT IN LlFTlNG-JACKS.

Specification forming part of Letters Patent No. 193,93 R, dated August 7, 1877; application filed June 23, 1877.

To all whom it may concern Be it known that I, TLMO'rHY R. DAY, of Devalls Bluff, in the county of Prairie and State of Arkansas, have invented certain new and useful Improvements in Wagon-Jacks; and 1 do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same, reference being-had to the accompanying drawings, which form a part of this specification, and in which a Figure l is a side elevation of the jack standing at full length. Fig. 2 is a similar view, the joint being bent. Fig. 3. is a perspective view of the lower end of the upper piece A detached; and Fig. 4 is a longitudinal vertical section of the jack complete.

This invention relates to that class of devices which are used for lifting the sides of carriages and wagons for the purpose of detaching or lubricating the wheels; and it consists, first, in the construction of the lever, which is self-setting, and so arranged as to prevent the wagon from sliding off while being lifted and, secondly, in the construction of the joint, by which the jack may be adjusted to wagons of different heights,-all as hereinafter more fully shown and described. ln the drawings, A is apost or upright, having at its upper end a recess, b, in which is pivoted a lever, B. The end of this has a curved recess, 0, thus presenting two points, a (1,. The end of the lever itself is curved, as shown at d, and shod with iron, the body of the lever being made of wood. The lower end of upright A is tenoned, as shown at e 0, so as As will be seen by reference to'the accompanying drawings, the peculiar construction of the joint by which the upright A and block 0 are connected (or the slot is, which takes the place of an ordinary pivot-hole) enables thejack to be adjusted in either of the positions shown in Figs. 1 and 2, the difl'erence in height being equal to the difference between the height and width of the block 0. In either case the upright A rests firmly upon the square shoulders formed by the tenons e e.

The operation of my improved wagon-jack is obvious, and requires no explanation. The construction of the lever enables it to be used with equal advantage for square and round axles, the curve of the lever preventing slipping, and when the wagon is raised the body will be supported by the points a a, which being, when raised, upon the side of the fulcrum of the lever, retain it in its elevated position as long as desired.

Having thus described my invention, I

TIMOTHY R. DAY.

Witnesses: I

J. M. MoOLIN'rocK, JAMES LOVEJOY.

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