Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch cut-out
Patent
1988-03-10
1989-12-26
Yusko, Donald J.
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch cut-out
315171, 315172, 315176, 315177, 315244, 315DIG5, H05B 3700, H05B 3900
Patent
active
048900419
ABSTRACT:
A lamp start, hot-restart and operating circuit for a high wattage, high intensity discharge lamp includes cascaded resonant circuits with capacitors and series-connected inductors connected to an AC source. A pulse circuit including two pulse transformers supplies streamer-forming current, the secondary windings of the pulse transformers being connected in series with the lamp. When the lamp commences normal operation, the operating current energizes a relay to remove the capacitors and pulse circuit from the operating circuit, allowing the inductor to function as the lamp ballast.
REFERENCES:
patent: 4127795 (1978-11-01), Knoll
patent: 4342948 (1982-08-01), Samuels
patent: 4663571 (1987-05-01), Nilssen
patent: 4682082 (1987-07-01), MacAskill et al.
Nuckolls Joe A.
Payne Paul E.
'Hubbell Incorporated
Farley Walter C.
Palladino Brian
Presson Jerry M.
Yusko Donald J.
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