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US Patent: 24,190
Wrench
Patentee:
John W. Brewster - Stamford, NY

USPTO Classifications:
81/152, 81/177.1

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John O. Brewster
G. W. Gardner

Patent Dates:
Granted: May 31, 1859

Patent Pictures:
John W. Brewster patent May 31, 1859
USPTO pdf tiff
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Description:
The wrench shank is six-sided; the sliding movable jaw has a slightly oblique hole, so that as pressure is applied to the jaw face, the sides of the hole bind against the sides of the wrench shank. A retaining pin keeps the jaw from sliding off the shank.

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