US Patent: 397,988 - Thumb Nut Wrench


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US Patent: 397,988

Thumb Nut Wrench

Patentee:

Charles W. Kimball (exact or similar names) - Chicago, IL

USPTO Classifications:

411/435, 411/918

Tool Categories:

wrenches

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Chas. E. Gaylord

L. M. Freeman

L. B. Coupland

Patent Dates:
Applied:	Jun. 05, 1888
Granted:	Feb. 19, 1889

Patent Pictures:

Charles W. Kimball patent February 19, 1889

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Description:

A large-proportioned wing nut form with a slot for insertion of a square nut. If constructed as shown in the drawing, this would end up being "locked into place" by the nut it manipulates.