Positive starting and operating apparatus for high-pressure sodi

Details Positive starting and operating apparatus for high-pressure sodi Positive starting and operating apparatus for high-pressure sodi

1976-10-06

1979-03-06

Nelson, Peter A.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

H05B 4116

Patent

active

041433041

ABSTRACT:
Lighting apparatus provides high-voltage pulses for starting high-pressure sodium discharge lamps and thereafter provides operating ballasting. The apparatus uses a voltage amplification circuit the output of which is applied across a ballast reactor which is connected thereto in autotransformer relationship. This provides a sufficiently high-voltage starting pulse, even when ballast reactors of low open circuit voltage are used, to initiate the operation of high-pressure sodium discharge lamps.

REFERENCES:
patent: 3475651 (1969-10-01), Harding et al.
patent: 3579026 (1971-05-01), Paget
patent: 3676734 (1972-07-01), Shimizu et al.
patent: 3917976 (1975-11-01), Nuckolls
patent: 3931543 (1976-01-01), Nuckolls
patent: 3963958 (1976-06-01), Nuckolls
patent: 3997814 (1976-12-01), Toho

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