H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/56
H05B 41/04 (2006.01) H05B 41/295 (2006.01)
Patent
CA 1226893
11 ABSTRACT: Arrangement provided with a DC/AC converter for igniting and feeding a gas- and/or vapour discharge lamp. The invention relates to an arrangement provided with a DC/AC converter (10, 11, 13-66) to which a dis- charge lamp (81) is connected. The lamp is shunted by a re- lay contact (90) to obtain an electric circuit through which two electrodes (83, 84) of the lamp can be pre- heated. In an arrangement according to the invention, it is ensured that the relay contact (90) is closed before a voltage occurs between the electrodes (83, 84) of the lamp (81). Thus, it is avoided that the lamp exhibits a transient flash at too cold electrodes. A timing circuit (40-47) ensures that the contact (90) remains closed for about 1 second, after which the lamp (81) ignites at warm electrodes. No electrical losses occur in the relay (30) during operation of the lamp (81).
458636
Luursema Meerten
Palmers Hilbert
N.v.philips'gloeilampenfabrieken
Van Steinburg C.e.
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