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 comprisinga 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.
1 Assignment
0 Petitions
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.
-
Citations
6 Claims
-
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