US Patent: 609,895 - Combined Drill Gage and Protractor


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US Patent: 609,895

Combination Tool
Combined Drill Gage and Protractor

Patentee:

C. A. Mitchell (exact or similar names) - Indianapolis, IN

USPTO Classifications:

33/201, 33/426

Tool Categories:

layout tools : protractors

layout tools : measurement gauges

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

C. S. Frye

L. Nathan

Patent Dates:
Applied:	Jan. 17, 1898
Granted:	Aug. 30, 1898

Patent Pictures:

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Description:

This is a machinists' combination tool that provides a protractor or bevel gage with a center finder. The patent claims many features, but the drawing shows it being used to check the angles on a drill bit (which is what it is really designed for)