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US Patent: 539,890
Wrench
Patentee:
Edward A. Cochran - Brooklyn, NY

USPTO Classifications:
81/156

Tool Categories:
wrenches : wrench adjustment types

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. Kennedy
K. M. Tucker
H. F. Parker

Patent Dates:
Applied: Oct. 01, 1894
Granted: May 28, 1895

Patent Pictures:
Edward A. Cochran patent May 28, 1895
USPTO pdf tiff
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Description:
The patent describes a two-stage adjusting nut. The outer portion has paired gripping pawls which allow for quick adjustment by pressing their bases together to release their grip on the shank of the adjustable jaw. The inner portion is a conventional adjusting nut. The whole works is held in place by a compression spring. Alternate provisions for construction of the adjusting nut, and the handle are described. The end of the movable jaw shank has a screwdriver tip.

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