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US Patent: 283,546
Electro-magnetic motor
Patentee:
Edward Weston - Newark, NJ

USPTO Classifications:
125/13.01, 310/91, 83/477, 83/477.1, 83/575

Tool Categories:
electrical devices : electric motors
woodworking machines : circular saws : tablesaws
woodworking machines : woodworking machine mechanisms : woodworking power transmission

Assignees:
United States Electric Lighting Co. - New York, NY

Manufacturer:
Not known to have been produced

Witnesses:
Henry A. Beckmeyer
L. V. E. Innes

Patent Dates:
Applied: Mar. 15, 1883
Granted: Aug. 21, 1883

Patent Pictures:
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Description:
This is the earliest patent for a DMD (Direct Motor Drive) machine that we have found.

"My invention relates to devices for utilizing power transmitted by electric currents for purposes of sawing, grooving, or cutting timber and such material, the invention being applicable to those instruments that consists in general of a bench or table through which the saw or similar instrument driven by belts or gears projects. My object is mainly to utilize the power of an electro-magnetic motor directly for driving or operating such tools by dispensing with the gears or belts, and for this purpose I fix the tool directly to the shaft of an electro-magnetic motor, the motor itself being so constructed that it my be combined and used with a bench or table similar to those now in use."

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