Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Discharge device and/or rectifier in the cathode or heater...
Patent
1986-11-12
1988-06-07
Moore, David K.
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
Discharge device and/or rectifier in the cathode or heater...
315102, 315104, 315106, H05B 4123
Patent
active
047499095
ABSTRACT:
A ballast-inverter circuit for a discharge lamp with preheatable electrodes. The lamp is connected to the supply voltage input terminals via a ballast impedance. A triac provides a preheat current path for the lamp electrodes and has a gate electrode connected to an RC timing circuit. A PTC resistor is coupled between one input terminal and the timing circuit to trigger the triac so as to heat up the lamp electrodes and assist the lamp to ignite. The PTC resistor heats up until its resistance is so high that the timing circuit is no longer able to trigger the triac into conduction. The electrode preheat circuit is effectively disconnected from the lamp electrodes when the lamp is in operation.
REFERENCES:
patent: 3569776 (1971-03-01), Moerkens
patent: 3875459 (1975-04-01), Remery et al.
patent: 4017761 (1977-04-01), Woldring
patent: 4087723 (1978-05-01), Chermin et al.
patent: 4119887 (1978-10-01), Iyama et al.
patent: 4323824 (1982-04-01), Roche et al.
patent: 4588925 (1986-05-01), Fahnrich et al.
patent: 4642521 (1987-02-01), Smulders
Franzblau Bernard
Moore David K.
North American Philips Corporation
Treacy David R.
LandOfFree
Compact igniter for discharge lamps does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compact igniter for discharge lamps, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact igniter for discharge lamps will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-846372