Fluorescent light unit with dual light levels

Details Fluorescent light unit with dual light levels Fluorescent light unit with dual light levels

1980-12-19

1983-05-31

La Roche, Eugene R.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Plural circuit elements

315 58, 315 62, 315100, 315291, 315309, 315DIG4, H05B 4118, H05B 4142

Patent

active

043862969

ABSTRACT:
A screw-in fluorescent light unit having two light levels, for use in a 3-way socket. A reactor ballasts the lamp for high light output, and a positive temperature coefficient resistor (thermistor) is added to ballast the lamp for low light output and to facilitate lamp starting at the low light output. The light-level sequence is off-high-low-high-off.

REFERENCES:
patent: 2320424 (1943-06-01), Gates
patent: 2350462 (1944-06-01), Johns
patent: 2652483 (1953-09-01), Laidig
patent: 2817004 (1957-12-01), Baumgartner et al.
patent: 3028525 (1962-04-01), Morton
patent: 3836814 (1974-09-01), Rodriquez
patent: 4178535 (1979-12-01), Miller
patent: 4284925 (1981-08-01), Bessone et al.

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