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US Patent: 823,748
Clamp
Patentee:
Frederick E. Walden - Worcester, MA

USPTO Classifications:
269/182, 269/187

Tool Categories:
work holding : clamps : C clamps

Assignees:
Bay State Tool Co. - Boston, MA

Manufacturer:
Bay State Tool Co. - Boston, MA

Witnesses:
A. B. Upham
F. Tudor

Patent Dates:
Applied: Aug. 26, 1905
Granted: Jun. 19, 1906

Patent Pictures: [ 1 | 2 ]
USPTO pdf tiff
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Description:
One of these appeared in a Martin J. Donnelley auction. The screw can be set to travel freely by depressing the thumb latch.

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