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US Patent: 667,468
Wagon Jack
Patentee:
Charles James Shirreff - Brockville, ON Canada

USPTO Classifications:
254/106

Tool Categories:

Assignees:
None

Manufacturer:
Unknown

Witnesses:
Henry T. H. Marsden
W. H. Chapman
John Grist
H. H. Horsey

Patent Dates:
Applied: Nov. 13, 1899
Granted: Feb. 05, 1901

Patent Pictures: [ 1 | 2 | 3 ]
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Description:
Harry Grist - patent attorney

My invention relates to a lever lifting-jack for raising wagons, carriages, &c., and has for its object to frictionally hold the lift bar or shaft step by step or automatically while operating the lever. My invention consists of two gripping eyes or rings through which the vertically-operating lift-bar passes, and said eyes are rounded on the gripping-surface to insure the grip. The lifting-eye is hinged to the operating hand-lever, and the check eye or ring has an elbow projection which stands on a bracket at the top of the pipe-standard in which the lift-bar telescopes, said projection causing the eye to assume of itself an inclined position to grip the lift-bar by the downward pressure or gravity of said bar to hold the axle of the wagon at its elevated position, so that at every down-stroke of the free end of the lever the upper or lifting ring or eye, which is connected thereto by a hinge-joint, raises the lift-bar, which afterward becomes disengaged on the upstroke of the lever. On the upstroke of the lever the check-eye will frictionally grip the lift-bar by reason of its gravity or pressure downward and hold the lift-bar from falling until the operation is repeated. The lift-bar is fully released by slightly depressing the free end of the lever to take off the pressure and then removing the elbow of the check-eye from the bracket to cause the check-eye to change from an inclined to a horizontal position and lie flatly and loosely upon the bracket, thereby permitting the lift-bar to slide freely through the check-eye when the grip of the lift-eye is released by raising the free end of the lever until both eyes meet, the impact releasing the lift-eye of its grip. The lift-bar will then fall by its own weight automatically and by releasing the check-eye as aforesaid the lift-bar B will fall by its own gravity or imposed weight.

I claim as my invention;

A wagon-jack, comprising a pipe-standard A, having a bracket A3, at top, a lift-bar B, telescoping into said standard, a lever C, fulcrumed to said bracket by a link D, a lift gripping-eye E, hinged to the shorter end of said lever, and a check gripping-eye F, having an elbow F', adapted to stand displaceable on said bracket, said lift-bar passing through both eyes, whereby the cheek-eye F, will incline downwardly against said bar and the eyes alternately grip the bar when the lever is operated, and when said elbow is displaced, its eye will lie on said bracket, and being loose, the lift-bar slides freely in it, and when the lift-eye is brought into contact with the checkeye by raising the free end of the lever s the impact releases the grip of the lift-eye and the lift-bar slides in both eyes, by gravity after use.

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