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US Patent: 437,403
Clamp
Patentees:
Arnold Nacke - Philadelphia, PA
Albert Brinkmann - Philadelphia, PA

USPTO Classifications:
269/166, 269/203, 269/221, 269/285

Tool Categories:
work holding : clamps : bar and pipe clamps

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
W. W. Mortimer
F. Granby Elmore
Harold E. Cobb
William J. Kelly

Patent Dates:
Applied: Jan. 16, 1890
Granted: Sep. 30, 1890

Patent Pictures:
Arnold Nacke and Albert Brinkmann patent September 30, 1890
USPTO pdf tiff
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Description:
The movable jaw has sliding plates that bear against the hank of the clamp. The base of the sliding jaw has a thumb screw which hold it in place, and by lever action also tightens the grip of the clamp.

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