Ballast for supplying a plurality of discharge lamps

Details Ballast for supplying a plurality of discharge lamps Ballast for supplying a plurality of discharge lamps

1990-10-11

1992-01-07

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Plural load device systems

Plural discharge device loads

315153, 315154, 315320, 315322, H05B 4114

Patent

active

050794850

ABSTRACT:
A device which enables a plurality of discharge lamps that are connected to a common ballast to be turned on and off separately via external switches. The operation circuit of the ballast is connected to the external switches through decouplers. The operation circuit may be supplied with voltage via any of the decouplers. A detector detects which of the switches has been closed and closes a logic member in the lamp circuit of the discharge lamp concerned. Consequently, the only lamp circuits that are closed are those in which the detectors have responded.

REFERENCES:
patent: 2859387 (1958-11-01), Ulffers
patent: 4238711 (1980-12-01), Wallot
patent: 4247766 (1981-01-01), Warren et al.
patent: 4260932 (1981-04-01), Johnson
patent: 4484105 (1984-11-01), Kriete et al.
patent: 4947086 (1990-08-01), Hagano

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