Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1978-03-10
1980-12-02
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
042374057
ABSTRACT:
A method and apparatus for regulating the luminous 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 principal advantage of this regulation is that only the minimum energy necessary to produce a required minimum luminous flux is used from the power sources irrespective of its voltage value within the operative range. The power pulses applied to the lamp are of a voltage that varies 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. The oscillating signal generator for providing the power pulses is defined for sensing the power source output voltage variations and generates a fixed frequency signal having amplitudes varying between values directly related to the power source output voltages.
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Chatmon, Jr. Saxfield
DaRin Edward J.
Lear Siegler, Inc.
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