Apparatus for starting high pressure gaseous discharge lamps

Details Apparatus for starting high pressure gaseous discharge lamps Apparatus for starting high pressure gaseous discharge lamps

1975-06-02

1977-09-13

Demeo, Palmer C.

Electric lamp and discharge devices: systems

Plural power supplies

Diverse-type current supplies

315239, 315243, 315277, H05B 41231, H05B 4124

Patent

active

040485390

ABSTRACT:
Method and apparatus for start and hot restart of a high pressure arc discharge lamp includes the application of an AC ionizing potential to the lamp, the ionizing potential characterized by a period such that the electron density of the fill material of the lamp is increased on each half cycle of said potential until the lamp is started. The invention is disclosed in an integrated ballast, and in an addition to an existing conventional ballast.

REFERENCES:
patent: 2892125 (1959-06-01), Warner et al.
patent: 2951971 (1960-09-01), Schultz
patent: 3170084 (1965-02-01), Retzer
patent: 3235770 (1966-02-01), Wattenbach
patent: 3309566 (1967-03-01), Michalski
patent: 3575630 (1971-04-01), Edris
patent: 3732460 (1973-05-01), Wattenbach

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