High pressure sodium vapor lamp stabilized for pulse operation

Details High pressure sodium vapor lamp stabilized for pulse operation High pressure sodium vapor lamp stabilized for pulse operation

1976-08-02

1977-10-04

Rolinec, Rudolph V.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For plural electrodes of discharge device

313229, 313219, 313213, H01J 6106

Patent

active

040526364

ABSTRACT:
High pressure sodium vapor lamps operated on sonic frequency pulses with short duty cycle in order to raise the color temperature are subject to arc instability near the electrodes and to overheating of the end closures, particularly that at the anode end when unidirectional pulsing is used. Stability and long life is achieved and overheating is prevented by using electrodes of cross-sectional area from 0.3 to 0.4 times the envelope cross section and lengthening the distance from closure to electrode tip so that the arc gap is less than 80% of the gas column length.

REFERENCES:
patent: 3473071 (1969-10-01), Rigden et al.
patent: 3708710 (1973-01-01), Smyser et al.

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