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US Patent: 442,020
Vernier Scale
Patentee:
Samuel Darling (exact or similar names) - Providence, RI

USPTO Classifications:
33/483, 33/832

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John S. Lynch
Socrates Scholfield
Patent Dates:
Applied: Mar. 22, 1890
Granted: Dec. 02, 1890

Patent Pictures:
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Report data errors or omissions to steward Russ Allen.
Description:
Combination of a finely divided measuring scale with a coarsely graduated vernier to overcome the difficulty in reading ordinary vernier scales.

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