Instant light lamp control circuit

Details Instant light lamp control circuit Instant light lamp control circuit

1978-02-15

1979-04-24

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Automatic substitution of the load device or electrode

Diverse-type load device or electrode substituted

315 87, 315219, H05B 4124, H05B 4146

Patent

active

041514459

ABSTRACT:
An instant light lamp combining a miniature arc tube and a standby filament in a sealed vitreous envelope is operated by a high frequency power supply combined with a filament control circuit. The power supply comprises transforming means including voltage sensing means having an output proportional to the drop across the arc tube. The control circuit comprises an electronic switch for energizing the filament and a comparator circuit which has an output gating on the switch when the sensing means output is either above a high limit or below a low limit.

REFERENCES:
patent: 3517254 (1970-06-01), McNamara, Jr.
patent: 3693045 (1972-09-01), Price
patent: 3737720 (1973-06-01), Willis
patent: 4005331 (1977-01-01), Horowitz

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