Arrangement in connection with a coupling device of a fluorescent lamp
First Claim
1. An arrangement in connection with a coupling device of a fluorescent lamp comprising a fluorescent tube and first and second cathodes, the coupling device comprising a supply transformer comprising a secondary, said secondary being coupled in parallel with said fluorescent tube, the cathodes and the secondary generating a current path, the arrangement comprising an indicator circuit configured to indicate the working condition of the fluorescent lamp, arrangement further comprising a signal transformer comprising a first primary coil, an alternating voltage signal supply being coupled to the first primary coil, a secondary coil, the secondary coil being coupled as part of the current path generated by the cathodes of the fluorescent lamp and a secondary of the supply transformer, said secondary coil being configured to supply alternating current to said current path as a part of a current circuit, the indicator circuit comprising transformer members configured to generate a signal responsive to the alternating current of the current circuit.
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Accused Products
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.
6 Citations
6 Claims
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1. An arrangement in connection with a coupling device of a fluorescent lamp comprising a fluorescent tube and first and second cathodes, the coupling device comprising a supply transformer comprising a secondary, said secondary being coupled in parallel with said fluorescent tube, the cathodes and the secondary generating a current path, the arrangement comprising an indicator circuit configured to indicate the working condition of the fluorescent lamp, arrangement further comprising a signal transformer comprising
a first primary coil, an alternating voltage signal supply being coupled to the first primary coil, a secondary coil, the secondary coil being coupled as part of the current path generated by the cathodes of the fluorescent lamp and a secondary of the supply transformer, said secondary coil being configured to supply alternating current to said current path as a part of a current circuit, the indicator circuit comprising transformer members configured to generate a signal responsive to the alternating current of the current circuit.
Specification