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US Patent: 57,195
Screw Clamp
Patentee:
Hermann Schmidt - New York, NY

USPTO Classifications:
269/182, 269/219

Tool Categories:
work holding : clamps : hand screws

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
W. Hauff
Wm. F. McNamara
Jas. A. Service

Patent Dates:
Granted: Aug. 14, 1866

Patent Pictures:
Hermann Schmidt Pat. Aug. 14, 1866
USPTO pdf tiff
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Description:
The threads in the clamp jaws are on spring loaded levers, so the threads can be swung away from the screws enabling quick adjustment.

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