US Patent: 274,545


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US Patent: 274,545

Wrench

Patentees:

Frank Armstrong (exact or similar names) - Bridgeport, CT

John H. Hine (exact or similar names) - Bridgeport, CT

USPTO Classifications:

81/134, 81/356, 81/413, 81/427

Tool Categories:

wrenches : wrench adjustment types : quick adjust wrenches

Assignees:

Frank Armstrong - Bridgeport, CT

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	Jan. 30, 1883
Granted:	Mar. 27, 1883

Patent Pictures:

Frank Armstrong and John H. Hine patent March 27, 1883

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Description:

The movable jaw slides, and is held in place by a tooth on the swinging handle that engages a rack on the shank. The spring between the jaw and lever handle keeps the jaw faces parallel.