Method and apparatus for saving energy

Details Method and apparatus for saving energy Method and apparatus for saving energy

1978-03-07

1980-10-28

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315310, 315311, 315DIG7, 307234, 323 17, 323 19, 323 22T, 363 23, G05F 100, H05B 3702, H05B 3904, H05B 4136

Patent

active

042309700

ABSTRACT:
A method and apparatus for regulating the output flux generated by a lamp with the degeneration of the voltage from a power source such as a battery. The regulating circuit maintains a constant luminous flux output from a lamp over a substantial range of voltages by switching the voltage to the lamp on and off at a preselected and controlled duty cycle. The power pulses applied to the lamp have heights that vary directly as the voltage variations of the power source and widths that vary as the inverse square of the voltage from the power source for maintaining a constant RMS voltage on the lamp and thereby constant light output flux.

REFERENCES:
patent: 3648106 (1972-03-01), Engel et al.
patent: 3890562 (1975-06-01), West
patent: 3898549 (1975-08-01), Mitchell
patent: 3946302 (1976-03-01), Kovalick et al.
patent: 3959716 (1976-05-01), Gilbert, Jr. et al.
patent: 3967159 (1976-06-01), Dendy et al.
patent: 3999100 (1976-12-01), Dendy et al.
patent: 4004187 (1977-01-01), Walker
patent: 4039897 (1977-08-01), Dragoset
patent: 4042856 (1977-08-01), Steigerwald
patent: 4076974 (1978-02-01), Gee
patent: 4093908 (1978-06-01), Evans

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