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US Patent: 594,399
Wrench
Patentee:
John A. Hill (exact or similar names) - Leechburg, PA

USPTO Classifications:
81/135

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. B. Hallock
S. S. Williamson
James B. Kifer
Isaac T. Klingensmith

Patent Dates:
Applied: Feb. 16, 1897
Granted: Nov. 30, 1897

Patent Pictures:
John A. Hill patent November 30, 1897
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Description:
A swinging rack bar attached to the fixed jaw of the monkey wrench engages rack teeth on the movable jaw to hold the adjustment. A notched rotating collar on the handle ferule serves to latch the rack bar in place.

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