Gas discharge lamp ballast with equally spaced windings

Details Gas discharge lamp ballast with equally spaced windings Gas discharge lamp ballast with equally spaced windings

1978-05-04

1980-01-15

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

315277, 315289, 315DIG7, H05B 4114, H05B 436

Patent

active

041841034

ABSTRACT:
A lamp ballast is disclosed which includes a main winding, and an auxiliary winding connected in series with the main winding. The auxiliary winding is wound concentrically with the main winding and with substantially fewer turns than it. The pitch (space between two adjacent turns) of the auxiliary winding is much higher than that of the main winding so that the turns of the auxiliary winding are spaced over the entire length of the main winding. When a voltage pulse of comparatively low amplitude is applied across the auxiliary winding by a conventional electronic lamp starter, a substantially higher amplitude pulse, which is sufficient to ignite a sodium lamp appears across the main winding, by reason of the improved transformer action between the two windings. Thereafter, the ballast provides sufficient support to the lamp to keep it on.

REFERENCES:
patent: 3374396 (1968-03-01), Bell et al.
patent: 3476977 (1969-11-01), Hallay

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