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US Patent: 37,459
Wrench
Improvement in Wrenches
Patentee:
Norton Porter (exact or similar names) - Youngstown, NY

USPTO Classifications:
81/143, 81/185.2

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

Assignees:
None

Manufacturer:
Norton Porter - Youngstown, NY

Witnesses:
J. W. Coombs
G. W. Reid
B. W. Moore
H. Stines

Patent Dates:
Granted: Jan. 20, 1863

Patent Pictures:
Norton Porter patent January 20, 1863 with nominal six-inch example.
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Description:
An eccentric cam on the adjustable jaw pushes a toothed slide against serrations on the shank to hold the adjustment.

Ken Cope's "American Wrench Makers 1830-1930" cites a contemporary advertisement for Porter's Adjustable Wrench.

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