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US Patent: 625,457
Wrench
Patentee:
William C. McCowan - Lancaster, OH

USPTO Classifications:
81/168

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. L. Phelps
J. H. Frasel
C. C. Shepherd
Charles Case

Patent Dates:
Applied: Aug. 29, 1898
Granted: May 23, 1899

Patent Pictures:
William C. McCowan patent May 23, 1899
USPTO pdf tiff
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Description:
Internal threads in the handle shift the movable jaw which has a partially threaded shank. A sliding latch on the main shank engages one of a series of notches in the handle to hold the adjustment against accidental change.

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