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US Patent: 483,803
Wrench
Improvements in Ratchet-Wrenches
Patentees:
Lawrence I. Folk - Dubuque, IA
John W. Nairn - Dubuque, IA
Louis H. Dempsey - Dubuque, IA

USPTO Classifications:
81/116

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
L. C. Hills
E. H. Bond
James McDonald
C. Gantenbein, Jr.

Patent Dates:
Applied: May 28, 1892
Granted: Oct. 04, 1892

Patent Pictures:
Lawrence I. Folk, John W. Nairn and Louis H. Dempsey patent October 4, 1892
USPTO pdf tiff
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Description:
The size adjustment is held by a sliding wedge. The jaw frame on which this wedge-adjust operates can be closed by a toggle-link lever and is held open by a spring.

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