Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Plural circuit elements
Patent
1978-10-03
1980-03-04
Smith, Alfred E.
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Plural circuit elements
313198, 313218, 315 60, 315 73, H01J 744
Patent
active
041919106
ABSTRACT:
High-pressure-discharge (HID) sodium lamp has a starting aid comprising a plug-like ceramic member extending through the longitudinal wall of the arc tube proximate one of the lamp electrodes. The plug-like ceramic member is fused to the alumina arc tube and is electrically conductive by virtue of having embedded therein a small percentage of finely divided refractory metal. At least during lamp starting, the plug-like ceramic starting aid is electrically connected through a resistor to the opposite lamp electrode and, as a result, on application of energizing potential, a glow discharge is established between the interior surface of the plug-like ceramic member and the proximate lamp electrode to ionize the atmosphere within the arc tube to facilitate lamp starting.
REFERENCES:
patent: 3226597 (1965-12-01), Green
patent: 3281309 (1966-10-01), Ross
patent: 3461334 (1969-08-01), Knochel et al.
patent: 3469729 (1969-09-01), Grekila et al.
patent: 3480823 (1969-11-01), Chen
patent: 3746914 (1973-07-01), Olson et al.
patent: 4103200 (1978-07-01), Bhalla
Palmer W. D.
Roberts Charles F.
Smith Alfred E.
Westinghouse Electric Corp.
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