US Patent: 317,923


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US Patent: 317,923

Wrench

Patentee:

Amos Call (exact or similar names) - Springfield, MA

USPTO Classifications:

81/93

Tool Categories:

wrenches : pipe and nut combination wrenches

Assignees:

Bemis & Call Hardware & Tool Co. - Springfield, MA

Manufacturer:

Not known to have been produced

Witnesses:

H. A. Chapin

J. D. Garfield

Louis Papanti

Patent Dates:
Applied:	Sep. 25, 1884
Granted:	May 12, 1885

Patent Pictures:

Amos Call patent May 12, 1885

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Description:

The patent describes a combination pipe and nut wrench where the movable jaws have a common adjusting nut on the central shank, and where the pipe jaw has a range of lateral motion with the jaw being forced outward by a compression spring in the body of the movable nut jaw.

In parallel patent 317,924 only one of the jaws engages with the adjustment screw.