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US Patent: 728,007
William H. Preston - Valley Junction, WI

USPTO Classifications:
81/161, 81/DIG.3

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

Philip M. Knippenberg - Portage, WI

Adjustable Wrench and Specialty Mfg. Co. - Harvard, IL

H. M. Sowle
W. H. Boyington
Louis Dieterich
Lee B. Kemon

Patent Dates:
Applied: Sep. 20, 1902
Granted: May 12, 1903

Patent Pictures:
William H. Preston patent May 12, 1903
USPTO pdf tiff
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Adjusting nut with interrupted threads can slide freely on the main shank, or adjust a partial turn when engaged with the threads on the shank. A spring-tensioned lever with projection acts to hold the adjustment. Teeth on the exterior of the adjusting nut have a "one-way" bevel so the nut can be tightened while the lever is pressing against it.

Produced as a nut wrench, pipe wrench, and combination pipe and nut wrench by the Adjustable Wrench and Specialty Mfg. Co. which formed at Oshkosh, WI and moved to Harvard, IL.

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