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US Patent: 941,506
Change Speed Mechanism
Patentee: Charles B. Elmore (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 144/92, 474/63, 474/68, 474/77 Tool Categories: metalworking machines : metalworking machine mechanisms : metalworking machine gearing : metalworking speed changing mechanisms metalworking machines : drilling and boring : drill presses Assignees: Samuel E. Elmore - Hartford, Hartford County, CT Manufacturer: Dwight Slate Machine Co. - Hartford, Hartford County, CT Witnesses: Arthur B. Jenkins Lena E. Berkovitch F. H. Elliott	Patent Dates: Applied: Nov. 07, 1906 Granted: Nov. 30, 1909 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Dwight Slate Machine Co.

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