Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Plural cathodes or heaters in the load device
Patent
1974-09-09
1976-03-02
Kominski, John
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
Plural cathodes or heaters in the load device
315106, 315243, 315244, 315DIG5, H05B 3700, H05B 4123
Patent
active
039420698
ABSTRACT:
A discharge lamp lighting apparatus includes three oscillation circuits. The first comprises a linear inductor and a capacitor connected in series to a power source. The second oscillation circuit is connected across the capacitor and includes a bounce or backswing booster inductor and a voltage responsive switching element connected in series. The third oscillation circuit comprises the bounce inductor and its distributed capacity. The bounce booster inductor has a magnetic core with a shape and of a material providing an abrupt saturation characteristic. The core factor K of the core is small and may have a ratio of the cross sections of the wound to the unwound parts thereof of less than one half. Alternatively, the ratio of the wound part of the core to the unwound part thereof is less than one fourth and a conventional core material may be employed for the core. Further, the peak temperature characteristic such as the first peak of the initial permeability of the core material may be selected in the range of -40.degree.C to +5.degree.C. The core is provided with a small gap to improve lamp starting operation at high temperatures, the gap having conventional as opposed to mirror polished faces.
REFERENCES:
patent: 3078429 (1963-02-01), Wiesher
patent: 3255512 (1966-06-01), Lochner et al.
patent: 3423709 (1969-01-01), Lugten
patent: 3663913 (1972-05-01), Kato et al.
patent: 3753037 (1973-08-01), Kaneda et al.
Fasse W. G.
Kominski John
NEC Sylvania Corporation
Roberts W. W.
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