Electric lamp and discharge devices: systems – Condenser in the supply circuit – Transformer in the condenser load device circuit
Patent
1975-01-03
1977-01-25
Grimm, Siegfried H.
Electric lamp and discharge devices: systems
Condenser in the supply circuit
Transformer in the condenser load device circuit
315240, 315243, 315245, 315289, 315DIG5, H05B 4118
Patent
active
040053369
ABSTRACT:
A starting circuit for high intensity discharge lamps supplied from an alternating current line through a ballast inductance, and in some cases a pulse transformer inductance, includes a surge voltage protector (SVP) or like voltage responsive, current switching gas breakdown device connected intermediate the end of the inductance, a capacitor connected to the lamp end of the inductance, the SVP and capacitor being connected in parallel with each other and in series with a resistance across the lamp so that upon breakdown of the device in each half AC cycle the capacitor discharges applying a voltage surge to the lamp stepped up through the inductance. The charge on the capacitor follows the ignition voltage required to start or reignite the lamp as the ignition voltage varies during the life of the lamp.
REFERENCES:
patent: 2963623 (1960-12-01), Cornell
patent: 3235770 (1966-02-01), Wattenbach
patent: 3353062 (1967-11-01), Nuckolls
patent: 3407334 (1968-10-01), Attewell
patent: 3917976 (1975-11-01), Nuckolls
Grimm Siegfried H.
Grover James H.
GTE Sylvania Incorporated
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