Rapid restrike starter for high intensity discharge lamps

Details Rapid restrike starter for high intensity discharge lamps Rapid restrike starter for high intensity discharge lamps

1987-05-26

1988-05-17

Dixon, Harold

Electric lamp and discharge devices: systems

Plural power supplies

Diverse-type current supplies

315246, 315276, 315290, 315DIG2, H05B 3700

Patent

active

047453419

ABSTRACT:
In a rapid restrike starter embodying the invention, a starting circuit applies a series of high voltage pulses, each of approximately the same magnitude through a transformer in series with the ballast and the high intensity discharge lamp to be started, a voltage triggered switch such as a sidac is used to turn the starting circuit on at a predetermined voltage, a second voltage triggered switch connected in series with the first acts in conjunction with a circuit comprised of capacitors and resistors to cause a series of resonant symmetric pulses each approximately the same magnitude as the initial pulse, the use of this oscillating pulse provides restrike performance at approximately two-thirds the pulse voltage otherwise required which improves long term reliability by decreasing the likelihood of socket arcing and insulation breakdown.

REFERENCES:
patent: RE31486 (1984-01-01), Helmuth
patent: 3235769 (1966-02-01), Wattenbach
patent: 3522475 (1970-08-01), Hashimoto
patent: 3544839 (1970-12-01), Fahnrich
patent: 3681653 (1972-08-01), Snyder
patent: 3699385 (1972-10-01), Paget
patent: 3758818 (1973-09-01), Kaneda
patent: 4342948 (1982-08-01), Samuels
patent: 4356433 (1982-10-01), Linden
patent: 4527098 (1985-07-01), Owen
patent: 4678968 (1987-07-01), Lester
patent: 4683404 (1987-07-01), Hitchcock

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