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US Patent: 181,699
Improvement in Wrenches
Patentee:
Thomas McDonough (exact or similar names) - Montclair, NJ

USPTO Classifications:
81/112, 81/77

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

Assignees:
None

Manufacturer:
Unknown

Witnesses:
Hugh Gallagher
N. O. Pillsbury

Patent Dates:
Applied: Feb. 26, 1876
Granted: Aug. 29, 1876

Patent Pictures:
Thomas McDonough Pat. August 29, 1876
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Description:
The patent is an expansion and improvement on McDonough's February 22, 1876 calipers and dividers patent (no. 173,802). This patent adds wrench jaws to the adjustment mechanism previously patented.

A known example has no legible markings.

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