Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Automatic cut-out or voltage regulator in the cathode or...
Patent
1984-07-05
1986-05-13
Moore, David K.
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
Automatic cut-out or voltage regulator in the cathode or...
315106, 315102, 315 96, 315210, 315DIG5, 315DIG7, H05B 4136
Patent
active
045889244
ABSTRACT:
An energization arrangement for a discharge lamp includes a DC/AC converter to which a discharge lamp (81) is connected. The lamp is shunted by a relay contact (90) to obtain an electric circuit through which two electrodes (83, 84) of the lamp can be preheated. It is advantageous to insure that the relay contact is closed before a voltage occurs between the electrodes of the lamp. This prevents the lamp from exhibiting a transient flash at too cold electrodes. A timing circuit (40-47) ensures that the relay contact remains closed for about 1 second, after which the lamp ignites with warm electrodes. No electrical losses occur in the relay winding (30) during operation of the lamp.
REFERENCES:
patent: 4256992 (1981-03-01), Luursema
Luursema Meerten
Palmers Hilbert
DeLuca Vincent
Franzblau Bernard
Mayer Robert T.
Moore David K.
U.S. Philips Corporation
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