Electricity: circuit makers and breakers – Multiple circuit control – Sequential operations
Patent
1988-09-01
1990-01-16
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Sequential operations
200 4, H01H 900
Patent
active
048944920
ABSTRACT:
Rotary switch providing selectable forward and reverse motor speeds responsive to a single control. A rotatable shaft moves two power source contacts interdependently between a motor terminal and a bus, for two polarity conditions, or holds the contacts in a power off condition. Three concentric coplanar tracks, radially spaced and centered about the shaft axis, each comprises conductive and non-conductive arcuate segments. At least one track has a segment powered by connection to the bus. Each conductive segment of a non-powered track is connected to a switch output. The shaft carries two arcuately spaced wipers, each providing electrical contacts for connecting conductive segments of a distinct pair of tracks including a powered track. Segments, wipers, and contacts are mutually spaced to successively connect distinct sets of segments as the shaft is rotated, to provide at the switch outputs distinct switch conditions including an off condition. Each switch polarity condition provides a plurality of switch output conditions.
REFERENCES:
patent: 3140689 (1964-07-01), Miner
patent: 3196237 (1965-07-01), Westgate, Jr.
patent: 3668491 (1972-06-01), Kelley et al.
patent: 4273971 (1981-06-01), Tregurtha
patent: 4518832 (1985-05-01), Geremia
Arkles Corp, T. Boebel, Blueprint of a Motor Control Switch, 1 sheet, date: 11-20-85.
Boyd Sylvia L.
Scott J. R.
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