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US Patent: 422,516
Wrench
Patentee:
Omer P. Foote (exact or similar names) - Newark, OH

USPTO Classifications:
81/140

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Ellsworth Henry
Edson B. Dennis

Patent Dates:
Applied: Feb. 21, 1889
Granted: Mar. 04, 1890

Patent Pictures:
Omer P. Foote patent March 4, 1890
USPTO (New site tip)
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Description:
Quick adjust action, with paired ratchet dogs in the movable jaw. The paired sets of rack teeth are "half a step apart" which doubles the number of adjustment stops for the wrench. The rack teeth are on either side of a spring which provides sufficient friction to keep the movable jaw open unless intentionally moved.

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