H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/50
H05B 41/14 (2006.01) H01J 7/30 (2006.01) H01J 61/54 (2006.01) H05B 41/04 (2006.01)
Patent
CA 1114889
PHF 77-505 ABSTRACT An electronic starter for igniting a discharge lamp, the starter having two input terminals interconnected by an elec- tric circuit which includes a controlled semiconductor switch and a control circuit for controlling this semiconductor switch. The control circuit contains a temperature-sensitive circuit element which inhibits at an elevated temperature the igniting function of the starter with the control circuit for the controlled semi- conductor switch comprising an auxiliary switch connected to the temperature-sensitive circuit element. The auxiliary switch is controlled by a threshold voltage element and is open if the voltage across the threshold voltage element is lower than its threshold voltage.
295704
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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