Fluorescent lamp ballast operable from two different power suppl

Details Fluorescent lamp ballast operable from two different power suppl Fluorescent lamp ballast operable from two different power suppl

1990-04-06

1992-03-24

Laroche, Eugene R.

Electric lamp and discharge devices: systems

Automatic substitution of the power supply

315226, 315DIG4, 315209R, H05B 3700

Patent

active

050991760

ABSTRACT:
A fluorescent lamp control system operable from either an AC power supply of a first frequency or a power supply of a second frequency and which operates the lamp in a dimmed condition when the power supply is that of the second frequency.

REFERENCES:
patent: 3373313 (1968-03-01), Prines
patent: 3611021 (1971-10-01), Wallace
patent: 3869639 (1975-03-01), Herzog
patent: 4158792 (1979-06-01), Kuroi et al.
patent: 4362971 (1982-12-01), Sloan
patent: 4694194 (1987-09-01), Hansel
patent: 4727291 (1988-02-01), Bavaro
patent: 4751398 (1988-06-01), Ertz
patent: 4866350 (1989-09-01), Counts
patent: 4952849 (1990-08-01), Fellows
patent: 5003230 (1991-03-01), Wong

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