Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Transformer in the supply circuit
Patent
1977-11-17
1979-07-03
Smith, Alfred E.
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Transformer in the supply circuit
323 51, 315DIG4, H05B 4116, H05B 4124
Patent
active
041601939
ABSTRACT:
A lamp system is provided wherein a high radiation intensity metal vapor electric discharge lamp is matched with a controllable regulating transformer which is characterized by having a sufficiently high open circuit voltage for striking an arc across the lamp and by having loose coupling between primary and secondary windings along with high impedance of the secondary winding sufficient for limiting an initially high starting current through the lamp to a value whereby, as the lamp warms up on power from the transformer, the lamp current decreases and the voltage across the lamp increases, allowing the lamp to reach a high radiation intensity level of operation, the system further being one in which the transformer is controlled by having controllable core structure to select a different intensity level of operation of the lamp.
REFERENCES:
patent: 772096 (1904-10-01), Hallberg
patent: 3873910 (1975-03-01), Willis, Jr.
Armentrout John B.
Smith Alfred E.
Wise Robert E.
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