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US Patent: 783,502
Clamp or vise
William Black - Mendota, IL
John Black - Mendota, IL

USPTO Classifications:
269/165, 269/222, 269/238

Tool Categories:
work holding : clamps : hand screws


Black Brothers Machinery Co. - Chicago, IL

Dan C. Haskell
George H. Madden

Patent Dates:
Applied: Feb. 09, 1903
Granted: Feb. 28, 1905

Patent Pictures: [ 1 | 2 | 3 | 4 ]
USPTO pdf tiff
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"Vintage Machinery" entry for Black Bros. Co.
An example of this clamp has been seen. The piece is marked, "PAT APLD FOR" along with the Black Bros. Mchy Co, Mendota, ILL. It is fairly close to the patent drawing except for the addition of a tilting jaw face.

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