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US Patent: 302,315
Gage
Lever-Locked Marking Gage
Patentee:
Charles L. Bellamy - Arlington, NJ

USPTO Classifications:
33/42

Tool Categories:
layout tools : marking gauges

Assignees:
None

Manufacturer:
Unknown

Witnesses:
Wm. A. Lowe
Wm. H. Weightman
Eugene N. Eliot
A. M. Pierce

Patent Dates:
Applied: Feb. 20, 1884
Granted: Jul. 22, 1884

Patent Pictures: [ 1 | 2 ]
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Description:
This is perhaps the king of the cam-locked head patents. It uses an eccentric cam, which actuates a plunger, which compresses a rubber disk, which bears on a plate on top of the arm. Rube Goldberg would be proud...

The locking mechanism on this piece is so complicated that it must have been extremely fragile. The few examples of this piece that I know of are all inoperable

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