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US Patent: 86,308
Adjustable Gauge
Patentee:
Robert E. Jones - New York, NY

USPTO Classifications:
33/555.2

Tool Categories:
layout tools : special purpose gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Fred Haynes
A. Kinnear

Patent Dates:
Granted: Jan. 26, 1869

Patent Pictures:
USPTO pdf tiff
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Description:
This is a simple "Go/No-Go" gauge designed to test the diameter of a rod. A rod of the desired diameter will be able to pass through one end of the gauge, but not the other. This allows a quick test to ensure the parts is within tolerance.

The actual diameter is adjustable using the screw in the head

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