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US Patent: 599,844
Wrench
Patentee:
Edward J. Johnson (exact or similar names) - Austin, PA

USPTO Classifications:
81/134

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

Assignees:
Edward J. Johnson - Austin, PA
Alexander Rambo, Sr. - Austin, PA

Manufacturer:
Not known to have been produced

Witnesses:
Chas. E. Brock
Wm. F. Doyle
Ambrose H. Sassaman
Frank E. Baldwin

Patent Dates:
Applied: Oct. 14, 1897
Granted: Mar. 01, 1898

Patent Pictures:
Edward J. Johnson patent March 1, 1898
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Description:
Quick adjust nut wrench with a spring-loaded pawl inside the movable jaw engaging rack teeth inset in one side of the main shank. A stud on the pawl is threaded for a thumb screw which turns the pawl against spring pressure to allow the jaw to open.

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