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US Patent: 222,744
Improvement in Measuring Scales and Rules
Patentee:
Lucian Sharpe (exact or similar names) - Providence, Providence County, RI

USPTO Classifications:
33/490, D10/70, D11/95

Tool Categories:
rules

Assignees:
Darling, Brown & Sharpe - Providence, Providence County, RI

Manufacturer:
Darling, Brown & Sharpe - Providence, Providence County, RI

Witnesses:
Geo. Fuller
J. C. B. Woods

Patent Dates:
Applied: Sep. 30, 1878
Granted: Dec. 16, 1879

Patent Pictures:
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"Vintage Machinery" entry for Brown & Sharpe Mfg. Co.
Description:
Three sided "draftsmen rule" made of sheet brass formed into a seamless tube and then formed into a triangular shape instead of using boxwood. Sold by DBS as the No 72.

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