Electric lamp and discharge devices: systems – Condenser in the supply circuit – Inductance in the condenser circuit
Reexamination Certificate
2007-01-08
2010-10-26
Philogene, Haissa (Department: 2821)
Electric lamp and discharge devices: systems
Condenser in the supply circuit
Inductance in the condenser circuit
C315S239000, C315S274000, C315S291000, C315S307000
Reexamination Certificate
active
07821208
ABSTRACT:
An inductively powered gas discharge lamp assembly having a secondary circuit with starter circuitry that provides pre-heating when power is supplied to the secondary circuit at a pre-heat frequency and that provides normal operation when power is supplied to the secondary circuit at an operating frequency. In one embodiment, the starter circuitry includes a pre-heat capacitor connected between the lamp electrodes and an operating capacitor located between the secondary coil and the lamp. The pre-heat capacitor is selected so that the electrical flow path through the pre-heat capacitor has a lesser impedance than the electrical flow path through the gas of the lamp when power is applied to the secondary circuit at the pre-heat frequency, and so that the electrical flow path through the pre-heat capacitor has a greater impedance than the electrical flow path through the gas when power is applied the operating frequency. The primary circuit may include a tank circuit for which the resonant frequency can be adjusted to match the pre-heat frequency and the operating frequency.
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Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration, Dec. 21, 2007.
Baarman David W.
Mollema Scott A.
Schwannecke Joshua K.
Stoddard Ronald L.
Access Business Group International LLC
Philogene Haissa
Warner & Norcross & Judd LLP
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