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US Patent: 12,510
Improvement in Screw-Wrenches
Joseph Hyde - New York, NY

USPTO Classifications:
81/150, 81/97

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


Gray Brothers - New York, NY

J. G. Mason
J. W. Coombs

Patent Dates:
Granted: Mar. 13, 1855

Patent Pictures: [ 1 | 2 ]
Joseph Hyde patent March 13, 1855
USPTO pdf tiff
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The title is misleading. The moveable jaw is held in position by a cam-lever, and the patented feature is a moveable jaw insert which enables the wrench to grip pipe or other round objects.

A GRAY BROTHERS (N.Y.) 1857 listing shows a HYDE's PATENT GRIPPING WRENCH that incorporates features of this patent and Hyde's Oct. 2, 1855 patent (no. 13,617). The directory also connects this firm to Gray's Ratchet Bed Key (see patent no. 71,871 for later manifestation).

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