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US Patent: 1,001,471
Micrometer Calipers
Direct-Reading Micrometer
Patentee:
Frank Spaulding (exact or similar names) - Providence, RI

USPTO Classifications:
33/819

Tool Categories:
layout tools : measurement gauges

Assignees:
Brown & Sharpe Mfg. Co. - Providence, RI

Manufacturer:
Not known to have been produced

Witnesses:
Ada E. Haggerty
J. A. Miller
Annie F. Miller

Patent Dates:
Applied: Jun. 27, 1909
Granted: Aug. 22, 1911

Patent Pictures:
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Report data errors or omissions to steward Ralph Brendler
"Vintage Machinery" entry for Brown & Sharpe Mfg. Co.
Description:
This micrometer uses a series of internal gears to display the measurement as numbers instead of using a vernier.

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