Add-on instant restrike device for an HID lamp

Details Add-on instant restrike device for an HID lamp Add-on instant restrike device for an HID lamp

1977-05-26

1978-07-25

Smith, Alfred E.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Discharge device and/or rectifier in shunt to the load device

315243, 315DIG7, H05B 4104

Patent

active

041032098

ABSTRACT:
An "add-on" instant restrike device for a high-intensity discharge lamp ballast. The device initiates an operating discharge in an HID lamp when it is still hot from previous operation. The device consists of a high-voltage pulse-generating section which initiates breakdown in the lamp and an intermediate-voltage generating section which coacts with the existing ballasting capacitor to apply an intermediate potential to the lamp after initial breakdown. The intermediate potential has sufficient duration to permit one of the lamp electrodes to form an operating hot spot thereon to establish stable lamp operation.

REFERENCES:
patent: 3732460 (1973-05-01), Wattenbach

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