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US Patent: 187,112
Improvement in Carpenters' Gages
Patentee:
Charles O. Farciot (exact or similar names) - San Francisco, CA

USPTO Classifications:
33/42

Tool Categories:
layout tools : marking gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Wm. B. Upperman
F. H. Duffy
P. C. Dietrich

Patent Dates:
Applied: Nov. 02, 1876
Granted: Feb. 06, 1877

Patent Pictures:
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Report data errors or omissions to steward Ralph Brendler
Description:
The 1870s were a banner decade for marking gage head locking patents-- here's another, only this time it's a metal gage. This one uses a tapered split collar on the head, which can be tightened by advancing a locknut to compress the sides of the collar.

This doesn't seem like that great an idea to me. I would think that it would be very difficult to keep the bar from slipping out of position while tightening the head. Once the arm was locked, though, it would certainly hold its position securely!

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