Apparatus for safely connecting the lamp to the equipment...

Details Apparatus for safely connecting the lamp to the equipment... Apparatus for safely connecting the lamp to the equipment...

2006-05-26

2008-10-21

Owens, Douglas W. (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S224000

Reexamination Certificate

active

07439680

ABSTRACT:
Apparatus for safely connecting a lamp to an equipment voltage ground, includes a rectification circuit for rectifying the power supply alternating voltage into a direct voltage, and an oscillating circuit for converting the direct voltage into alternating voltage for driving the lamp to work. The oscillating circuit includes a DC-blocking capacitor, a oscillating inductor and an oscillating capacitor orderly connected in series, and one end of the DC-blocking capacitor is connected to the output rectification voltage of the rectification circuit, and another end is connected to the oscillating inductor, while one end of the oscillating capacitor is connected to the equipment voltage ground, and another end is connected to the working voltage terminal of the lamp. The ground terminal of the lamp is electrically connected to the equipment voltage ground through a parallel circuit formed of a switch and a high impedance capacitor.

REFERENCES:
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patent: 6291944 (2001-09-01), Hesterman et al.
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patent: 6936973 (2005-08-01), Parra et al.
patent: 2002/0047604 (2002-04-01), Schadhauser et al.
patent: 2004/0124785 (2004-07-01), Alexandrov

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