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US Patent: 263,794
Wrench
Patentee:
Dolphus S. Maynard - Auburn, NY

USPTO Classifications:
81/162

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
W. B. Wasson
L. C. Hills
R. N. Hudson
R. R. Westcott

Patent Dates:
Applied: Jul. 17, 1882
Granted: Sep. 05, 1882

Patent Pictures:
Dolphus S. Maynard patent September 5, 1882
USPTO pdf tiff
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Description:
A threaded three-lobed adjusting cam on the base of the movable jaw meshes with a rack on the back side of the main bar. The bar is oval or diamond shaped so the sliding jaw wedges tightly against the shank, and the three lobes on the adjuster are to compensate for wear.

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