Electric lamp and discharge devices: systems – With signal – indicator – or alarm – Electrically operated switch controlling the signal circuit
Patent
1992-11-03
1994-03-01
Pascal, Robert J.
Electric lamp and discharge devices: systems
With signal, indicator, or alarm
Electrically operated switch controlling the signal circuit
315290, 315219, 315276, 315DIG7, 315307, G05F 100, H05B 3702
Patent
active
052911004
ABSTRACT:
A low DC input, low wattage, high efficacy metal halide arc discharge lamp apparatus is provided which has a simplified control system including a regulated power supply, a forty kilohertz oscillator and driver for powering the bulb a main power transformer connected to the metal halide bulb; a starting and filtering inductive/capacitive network connected to the secondary of said main power transformer for start up and running the arc discharge bulb, and a power output sensing and emergency shutdown control circuit for safety shutdown of the system should a failure occur in the lamp or associated circuitry that could cause undesired sparking. An automatic mechanism for compensating for aging of the discharge bulb is also provided.
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Pascal Robert J.
Shingleton Michael
Welch Allyn Inc.
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