Single-wired switching circuit directed to limit surge into lamp

Details Single-wired switching circuit directed to limit surge into lamp Single-wired switching circuit directed to limit surge into lamp

1988-01-27

1989-08-08

Boudreau, Leo H.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315DIG5, 315311, 361 58, 323908, 323902, H05B 3702

Patent

active

048556491

ABSTRACT:
Disclosed is a novel switching circuit directed to use for limiting surge into lamp, comprising a diode circuit wherein two sets of diodes are connected in reverse-parallel; a resistive element connected in series with a lamp to limit the switch-on surge thereinto; a bidirectionally conductive element having a main current path connected in seried with an ac source through said resistive element, diode circuit and lamp; and a timing circuit having a time constant, said timing circuit triggering said bidirectionally conductive element with the voltage across said diode circuit to short-circuit said resistive element after a lapse of said time constant from switch-on.

REFERENCES:
patent: 4463284 (1984-07-01), Tamura et al.
patent: 4555741 (1985-11-01), Masaki
patent: 4572992 (1986-02-01), Masaki
patent: 4644229 (1987-02-01), Masaki
patent: 4701675 (1987-10-01), Masaki
patent: 4716511 (1987-12-01), Masaki

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