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US Patent: 436,101
Carpenter's Gage
Patentee:
William P. Orr - Bradshaw, TN

USPTO Classifications:
33/44

Tool Categories:
layout tools : marking gauges

Assignees:
William P. Harwell - Bradshaw, TN

Manufacturer:
Not known to have been produced

Witnesses:
R. J. Curtis
W. B. Orr
Geo. E. Frich
H. F. Riley

Patent Dates:
Applied: Dec. 28, 1889
Granted: Sep. 09, 1890

Patent Pictures:
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Description:
This tool is perhaps the stupidest marking gage ever patented. It features eighteen retractable fixed points (!), designed such that you can advance two to get a fixed width mortise in a wide variety of sizes.

This tool was so complex that it features a table engraved into a metal plate on the arm, detailing which combinations of screws result in specific mortise widths. I can't imagine anyone thinking this was a good idea.

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