Dual-envelope high-pressure discharge lamp with thermostatically

Details Dual-envelope high-pressure discharge lamp with thermostatically Dual-envelope high-pressure discharge lamp with thermostatically

1991-03-20

1992-01-07

Yusko, Donald J.

Electric lamp and discharge devices

With gas or vapor

Three or more electrode discharge device

313 25, 313607, H01J 6154

Patent

active

050794795

ABSTRACT:
To eliminate a holding frame for a starting wire (20) outside of an elongd discharge vessel (1), the starting wire (20) is directly connected to one of the electrode leads (4, 5), typically niobium tubes, by a bimetal strip (21) which is, preferably, bent in stepped form or Z shape. Under cold conditions, the strip or wire (20) is in engagement with the outside of the discharge vessel (1) to assist in starting, due to its electrical connection via the bimetal strip (21) with one of the electrodes; upon heating of the lamp, the bimetal strip (21) will lift the wire (20) off engagement with the discharge vessel (1) and thus prevent deterioration thereof.

REFERENCES:
patent: 2284103 (1942-05-01), Smitley
patent: 3755708 (1973-08-01), Andesse
patent: 4633135 (1986-12-01), Akins
patent: 4837477 (1989-06-01), Dassler et al.

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