Circuit for selective individual operation of multiple arc discharge lamps
First Claim
1. A circuit for selectively and individually starting and operating at least two arc discharge lamps connected in parallel, comprising:
- a regulator for providing regulated current for operating a selected one of the at least two lamps;
the regulator including means for connection to a power source and further including a pair of output terminals for connection to the respective lamps;
means for starting the at least two lamps, respectively, including at least two pulse transformers and a pulse generator for supplying pulses to the respective pulse transformers;
one each of said pulse transformers arranged for association with a corresponding one of said lamps; and
means for selecting a one of said lamps to be started and operated;
the selecting means arranged for low voltage operation and including means for enabling the regulator and the pulse generator and for steering the pulses from the pulse generator to a one of said pulse transformers associated with the one of said lamps selected for operation;
the selecting means further including means for disabling the pulse generator and the regulator for effecting turn-off of a previously lighted lamp and for resetting the circuit in preparation for starting a second of said lamps when the selecting means is operated to select the second of said lamps for operation.
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Accused Products
Abstract
A circuit including a switching regulator and a pair of pulse transformers for selectively starting and operating a pair of arc discharge lamps. The lamps are arranged to be connected in parallel across the regulator output, and in order to operate one lamp at a time, the circuit is provided with low-voltage switching means for selecting the lamp to be started and operated. This switching means, in the form of a ganged switch, includes a switch portion for completing an enable circuit from the regulator controller for enabling the regulator and a pulse generator, and a second switch portion for steering pulses from the generator to the pulse transformer associated with the lamp selected for operation.
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Citations
11 Claims
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1. A circuit for selectively and individually starting and operating at least two arc discharge lamps connected in parallel, comprising:
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a regulator for providing regulated current for operating a selected one of the at least two lamps;
the regulator including means for connection to a power source and further including a pair of output terminals for connection to the respective lamps;means for starting the at least two lamps, respectively, including at least two pulse transformers and a pulse generator for supplying pulses to the respective pulse transformers;
one each of said pulse transformers arranged for association with a corresponding one of said lamps; andmeans for selecting a one of said lamps to be started and operated;
the selecting means arranged for low voltage operation and including means for enabling the regulator and the pulse generator and for steering the pulses from the pulse generator to a one of said pulse transformers associated with the one of said lamps selected for operation;
the selecting means further including means for disabling the pulse generator and the regulator for effecting turn-off of a previously lighted lamp and for resetting the circuit in preparation for starting a second of said lamps when the selecting means is operated to select the second of said lamps for operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification