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US Patent: 1,218,316
Wrench
Patentee:
Mark A. Rice - Los Angeles, CA

USPTO Classifications:
81/165, 81/DIG3, D8/22

Tool Categories:
wrenches : wrench components : wrench adjustment locks
wrenches : wrench adjustment types

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. E. Larsen
Chas. J. Liebman

Patent Dates:
Applied: Aug. 22, 1916
Granted: Mar. 06, 1917

Patent Pictures:
M.A. Rice Pat. March 6, 1917
USPTO pdf tiff
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Description:
A coil spring provides tension on the adjusting nut to hold the adjusting nut against accidental movement.

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