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US Patent: 1,812,871
Variable Speed Controller Mechanism
Patentee: Benjamin P. Graves (exact or similar names) - Cranston, Providence County, RI USPTO Classifications: 409/145, 74/333, 74/527, 74/548 Tool Categories: metalworking machines : machine tool controls Assignees: Brown & Sharpe Mfg. Co. - Providence, Providence County, RI Manufacturer: Brown & Sharpe Mfg. Co. - Providence, Providence County, RI Witnesses: Unknown	Patent Dates: Applied: Jan. 20, 1928 Granted: Jul. 07, 1931 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Brown & Sharpe Mfg. Co
Description: We have seen this patent number, one of about 50 listed, on a No. 2B Plain Mill from Brown & Sharpe.

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