AC/DC-operable glow discharge starter having two bimetals

Details AC/DC-operable glow discharge starter having two bimetals AC/DC-operable glow discharge starter having two bimetals

1992-07-17

1994-05-31

O'Shea, Sandra L.

Electric lamp and discharge devices

With gas or vapor

Negative or cathode glow device

313620, 313622, 313147, 315 73, 337 22, H01J 1730, H01J 6164

Patent

active

053172329

ABSTRACT:
A glow discharge starter having an hermetically sealed envelope containing an ionizable medium, a bimetallic electrode including a first bimetallic element having a curved portion and a free end, and a counter electrode. A first discharge gap having a predetermined spacing is formed between the free end of the first bimetallic element and the counter electrode. The starter includes a second bimetallic element having an end secured to the counter electrode. A portion of the second bimetallic element is positioned adjacent the curved portion of the first bimetallic element such that a second discharge gap having a predetermined spacing is formed therebetween. In the event that the starter encounters a dc current of the wrong polarity, a portion of the second bimetallic element contacts the first bimetallic element so as to extinguish the arc discharge and prevent electrode damage.

REFERENCES:
patent: 2376669 (1945-05-01), De Toro
patent: 2673266 (1954-03-01), Bjorakman
patent: 2740861 (1956-04-01), Lake
patent: 4845406 (1989-07-01), Barakitis et al.
patent: 4882835 (1989-11-01), Barakitis et al.
patent: 4970425 (1990-11-01), Barakita
patent: 5097177 (1992-03-01), Chiang

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