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US Patent: 169,812
Wrench
Patentee:
Robert Jack - Jersey City, NJ

USPTO Classifications:
81/177.9, 81/62

Tool Categories:
wrenches : wrench adjustment types : angle adjustable wrenches

Assignees:
Robert Jack - Jersey City, NJ
Thomas Gannon - Jersey City, NJ

Manufacturer:
Not known to have been produced

Witnesses:
Michael Ryan
Henry T. Brown
John Becker
Fred Haynes

Patent Dates:
Applied: Aug. 30, 1875
Granted: Nov. 09, 1875

Patent Pictures:
Robert Jack Pat. November 9, 1875
USPTO pdf tiff
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Description:
Spring pawls and teeth allow the head to be adjusted in relation to the handle, including a limited range of ratchet action.

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