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US Patent: 601,851
Wrench
Patentee:
Alfred Barclay Frack (exact or similar names) - Girard, OH

USPTO Classifications:
81/169

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

Assignees:
Henry C. Marshall - Girard, OH

Manufacturer:
Not known to have been produced

Witnesses:
L. C. Proctor
E. C. Weaver

Patent Dates:
Applied: Jul. 26, 1897
Granted: Apr. 05, 1898

Patent Pictures:
Alfred Barclay Frack patent April 5, 1898
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Description:
The "turn handle to adjust" mechanism is accomplished by a ball in the outer handle that moves in a spiral groove on the outside of the extended shank of the movable jaw. A sliding latch can be slid into one of a series of notches in the flanged end of the outer handle to hold the adjustment.

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