Single input, single supply three-state controller

Details Single input, single supply three-state controller Single input, single supply three-state controller

1989-05-22

1990-01-23

Ro, Bentsu

Electricity: motive power systems

Motor-reversing

318256, 318273, 318293, 318443, H02P 122, H02P 312

Patent

active

048960845

ABSTRACT:
A circuit for controlling three modes of operation of a multiple terminal load using a single positive DC voltage 12, simple circuitry, two relays 26, 30 and a single input control line 17. The circuit senses a switch 16, or logic device generating three conditions: open circuit, connection to positive voltage or connection to ground. Three operating modes are effected while minimizing the number of wires needed to control the multiple terminal load.

REFERENCES:
patent: 1732711 (1929-11-01), Boddie
patent: 2875391 (1959-02-01), Brannan
patent: 3290575 (1966-12-01), Modiano
patent: 3305718 (1967-02-01), Waldron
patent: 4020361 (1977-04-01), Suelzle et al.
patent: 4020403 (1977-04-01), Means
patent: 4288726 (1981-09-01), Vazquez-Cuervo et al.
patent: 4394605 (1983-07-01), Terazawa
patent: 4677356 (1987-06-01), Tsuneda et al.

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