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US Patent: 385,464
Wrench
Patentee:
Richard Lee Mabrey - Doniphan, MO

USPTO Classifications:
81/111

Tool Categories:
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
P. B. Turpin
Fred. G. Dieterich
John P. Campbell
Jas. K. Langford

Patent Dates:
Applied: Nov. 15, 1887
Granted: Jul. 03, 1888

Patent Pictures:
Richard Lee Mabrey patent July 3, 1888
USPTO pdf tiff
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Description:
The two bars pivot, with a spring to spread them. The adjustment is held by a hinged pawl with gripping teeth engaging teeth on a stud on the opposite jaw piece. The shape of the teeth allows quick closing, with the pawl having to be swung open to open the wrench.

Ken Cope's "American Wrench Makers 1830-1930" notes a SCIENTIFIC AMERICAN item as evidence Mabrey contemplated producing the wrench.

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