Arrangement in connection with a coupling device of a...

Details Arrangement in connection with a coupling device of a... Arrangement in connection with a coupling device of a...

2006-07-11

2006-07-11

Philogene, Haissa (Department: 2828)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C315S120000, C315S278000, C315S224000, C315S239000, C315S246000

Reexamination Certificate

active

07075249

ABSTRACT:
An arrangement in connection with a coupling device of a fluorescent lamp, the coupling device comprising a supply transformer, whose secondary is coupled in parallel with a fluorescent tube, the arrangement comprising an indicator circuit configured to indicate the working condition of the fluorescent lamp. The arrangement comprises a signal transformer comprising a first primary coil, to which an alternating voltage signal supply is coupled, a secondary coil, coupled as part of a current path generated by cathodes of the fluorescent lamp and a secondary of the supply transformer and configured to supply alternating current to said current path, the indicator circuit comprising transformer members configured to generate a signal responsive to the alternating current of the current circuit.

REFERENCES:
patent: 3684891 (1972-08-01), Sieron
patent: 4104715 (1978-08-01), Lawson, Jr.
patent: 5367223 (1994-11-01), Eccher
patent: 6501225 (2002-12-01), Konopka
patent: 6504318 (2003-01-01), Pienisaari
patent: 6636190 (2003-10-01), Hirakata et al.

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