US Patent: 1,499,186


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Wrench

Patentee:

Thomas Murphy (exact or similar names) - Middletown, CT

USPTO Classifications:

81/112, 81/122, 81/145, 81/323, 81/328

Tool Categories:

wrenches : wrench adjustment types : quick adjust wrenches

wrenches : nut wrenches

Assignees:

Thomas Murphy - Middletown, CT

Berkley C. Stone - Middletown, CT

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	May 15, 1923
Granted:	Jun. 24, 1924

Patent Pictures:

Thomas Murphy patent June 24, 1924

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Description:

The adjustment on this open end wrench is a stud at the intersection of two slots. The stud has teeth on the underside of its head. The teeth mesh with grooves on the surface of the adjacent wrench half. The stud is held in place by a spring, and can be pushed back sufficiently to slide, thereby changing the adjustment.