Electric lamp and discharge devices: systems – With automatic shunt and/or cutout – Supply circuit current and/or potential actuated switch
Patent
1982-08-04
1984-05-22
LaRoche, Eugene
Electric lamp and discharge devices: systems
With automatic shunt and/or cutout
Supply circuit current and/or potential actuated switch
315225, 315291, 315308, 361 84, H05B 3702
Patent
active
044503849
ABSTRACT:
A light dimmer control system for controlling the current supplied from a DC power source to high power illuminating lamps. The current fed to the lamp is controlled by manually setting the width of the pulsed output of a pulse width modulator by means of a potentiometer or the like appropriately connected to the pulse width modulator. The output of the pulse width modulator drives an output driver circuit which is connected in series with the current path to the lamp. The lamp power is provided from a DC source which is controlled by the output driver circuit in series with the lamp. The power for the semiconductor components of the DC controller, which includes the pulse width modulator, is provided from the same DC source and stepped down by a DC-DC converter. A logical control circuit is employed which enables the energization of the system only when both the polarity of the DC input supply is correct and the low voltage DC is on, thereby minimizing the possibility of damaging system components.
REFERENCES:
patent: 3320477 (1967-05-01), Boeker
patent: 3719858 (1973-03-01), Gilbreath
LaRoche Eugene
Mole-Richardson Company
Sokolski Edward A.
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