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US Patent: 52,487
Improvement in Wrenches
John C. Conner - Williamsburg, NY

USPTO Classifications:

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches
wrenches : nut wrenches

T. J. Hennessey - New York, NY

T. J. Hennessey - New York, NY

Albert W. Brown
M. M. Livingston

Patent Dates:
Applied: Dec. 05, 1865
Granted: Feb. 06, 1866

Patent Pictures:
John C. Conner Pat. Feb. 6, 1866
USPTO pdf tiff
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The movable jaw has a cylindrical "heel" which slides inside the main shank. The adjustment is accomplished by a screw shaft fixed to the rotatable handle, which engages threads cut inside the "heel" of the movable jaw. According to an 1866 "Scientific American" listing cited in Ken Cope's "American Wrench Makers 1830-1930," T.J. Hennessey produced this wrench.

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