H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/59
H05B 41/14 (2006.01) H05B 41/04 (2006.01)
Patent
CA 1130366
1 PHN 9169 ABSTRACT: The invention relates to an electric arrangement comprising two series-arranged discharge tubes which are provided with preheatable electrodes and which are stabilized by means of a relatively small ballast. The tubes are shunted by a semi-conductor switching element which operates in the operating con- dition of the tubes. According to the invention a control circuit of the semi-conduator switching element includes a non-linear circuit element which ensures that the discharge tubes do not ignite bafore the electrodes are in tha warm stake.
330311
Chermin Hubertus M.j.
de Bijl Adrianus M.j.
Moerkens Jozef C.
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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