Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Transformer in the supply circuit
Patent
1992-03-26
1994-09-06
Mis, David
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Transformer in the supply circuit
315255, 315291, 315294, 315324, 315DIG4, 315284, H05B 41391
Patent
active
053451503
ABSTRACT:
A device for regulating the intensity of light emitted by a lamp includes a core of magnetic material, a first electrical circuit having a primary inductor wrapped around at least a portion of the core of magnetic material, and a second electrical circuit having a secondary inductor wrapped around at least a portion of the core of magnetic material. The first electrical circuit is designed for electrical connection to the lamp, and the primary inductor is arranged in the first electrical circuit in a manner such that a variation in the inductance of the primary inductor will cause a corresponding variation in the intensity of light emitted by the lamp. The second electrical circuit includes a control device (e.g., a variable impedance) for varying, at will, electrical current passing through the secondary inductor to cause a variation in the degree of saturation of the core of magnetic material around which the primary and secondary inductors are wrapped so that the inductance of the primary inductor in turn is varied, causing a change in the intensity of light emitted by the lamp. The control device is electrically isolated from voltage potentials present in the first electrical circuit.
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Mis David
Stocker & Yale, Inc.
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