Speed control switch

Details Speed control switch Speed control switch

1979-01-22

1980-12-23

Smith, Jr., David

Electricity: motive power systems

Portable-mounted motor and/or portable-mounted electrical...

200 1A, 200 16C, 200157, 318345D, 318345H, 338309, H02P 516

Patent

active

042412986

ABSTRACT:
An improved compact electronic switch for controlling an electric motor comprising a housing into which a trigger actuator reciprocates for selecting motor speed and a reversing switch mounted on the housing and interlocked with the trigger actuator for selecting motor direction. Improvements include; an improved switch contact arrangement which reduces arcing on switching from full power to variable power motor control, an improved printed variable resistor for the electronic speed control circuitry, and an improved and simplified reversing switch unit.

REFERENCES:
patent: 2095176 (1937-10-01), Douglas
patent: 3422386 (1969-01-01), Helgeland
patent: 3546556 (1970-12-01), Benkert et al.
patent: 3573703 (1971-04-01), Burks et al.
patent: 3637967 (1972-01-01), Braun
patent: 3745286 (1973-07-01), Sahrbacker
patent: 3761788 (1973-09-01), Matthews et al.
patent: 3886340 (1975-05-01), Bittel
patent: 3947801 (1976-03-01), Bube
patent: 4072834 (1978-02-01), Godfrey

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