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US Patent: 489,822
Wrench
Patentee:
George Washington Martin (exact or similar names) - Titusville, FL

USPTO Classifications:
81/179, 81/185.1, 81/185.2

Tool Categories:
wrenches : wrench adjustment types : quick adjust wrenches
wrenches : wrench components : wrench jaw components
wrenches : pipe and nut combination wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
C. P. Elwell
E. G. Julihn
H. F. Atkinson
Howell Titus
Patent Dates:
Applied: Oct. 13, 1892
Granted: Jan. 10, 1893

Patent Pictures:
George Washington Martin patent January 10, 1893
USPTO (New site tip)
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Description:
A rigid hook jaw, with a sliding toothed wedge forcing a work piece against a gripping block that inserts in the hook portion. The gripping block can be configured with an angled toothed face suitable for a pipe wrench, or a straight face suitable for a nut wrench.

Martin called his February 23, 12897 patent (no. 577,770) an improvement in certain regards.

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