US Patent: 76,519 - Improvement inWrenches


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US Patent: 76,519

Improvement inWrenches

Patentee:

A. S. Petrie (exact or similar names) - Hudson City, NJ

USPTO Classifications:

81/128, 81/146, 81/180.1

Tool Categories:

wrenches : nut wrenches

wrenches : wrench adjustment types

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

J. W. Coombs

A. Le Clerc

Patent Dates:
Granted:	Apr. 07, 1868

Patent Pictures:

A. S. Petrie Pat. April 7, 1868

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Description:

The movable jaw includes a sliding key with oblique ribs that meshes with transverse oblique grooves or ribs on the wrench shank. A pin or screw in the key limits its range of motion and holds in in the jaw.