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US Patent: 289,513
Micrometer Gage
Patentee:
Samuel Darling (exact or similar names) - Providence, RI

USPTO Classifications:
33/813

Tool Categories:
metalworking tools : machinist tools : measuring tools : micrometers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John E. Hall
Jacob Kettner

Patent Dates:
Applied: Sep. 08, 1883
Granted: Dec. 04, 1883

Patent Pictures:
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Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Brown & Sharpe Mfg. Co
Description:
Abstract:

The end in view in this invention is to so construct a micrometer gage that the index sleeve may be comparatively short say one inch long, more or less and be used to indicate correctly on a gage of any desired size and length of screw, and it consists in making the screw movable and adjustable in the sleeve.

Claim:

A micrometer-gage having, in combination, a frame, A, provided with a graduated fixed screw-nut, E, a revolving measuring-screw, B, and a graduated sleeve, D, said sleeve being shorter than the measuring capacity of the gage, and arranged to be changed and fastened to different parts of the screw and pass to and fro over the screw-nut E.

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