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US Patent: 219,942
Improvement in Carpenters' Gages
Patentee:
Alban Heiran - San Leandro, CA

USPTO Classifications:
33/42, 33/44

Tool Categories:
layout tools : marking gauges
layout tools : marking gauges : curve marking gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Samuel Fillman
Thomas Isaacs
Francis McArdle
C. Sedgwick

Patent Dates:
Applied: Jun. 05, 1879
Granted: Sep. 23, 1879

Patent Pictures:
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Description:
This patent covers a circular marking attachment for gages. It is a fairly simple idea, but it works quite well. It uses a pair of rollers attached to opposite edges of the face, allowing the gage to easily follow any convex or concave curve.

It is interesting to note that Mr. Heiran patented the rollers themselves, and not their layout. This allowed Stanley to come along a few years later and patent the same basic idea (334,308 - 1/12/1886), only using solid bumps rather than rollers.

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