High-pressure discharge tube operable in the open air without ou

Details High-pressure discharge tube operable in the open air without ou High-pressure discharge tube operable in the open air without ou

1978-09-21

1980-09-09

Demeo, Palmer C.

Electric lamp and discharge devices

With temperature modifier

Mounted on lead-in or electrode support

313 44, 313217, 313220, H01J 61073, H01J 6130, H01J 6152

Patent

active

042219876

ABSTRACT:
The high-pressure electric discharge tube of the invention can operate in the open air, with at least 10 Hg mm inner pressure. It has a preferably ceramic (or crystalline) envelope that constitutes an illuminator, with electrodes disposed in two opposite portions of the envelope, appropriate inlets, lead-ins and terminals leading to the electrodes. The discharge tube does not have to be surrounded by the hitherto applied, conventional, glass or other transparent protective envelope, as a result of which the emitted luminous output is free from reflections and the tube can be used throughout the entire spectrum, such as for pumping or driving a laser crystal. The protective envelope, which so far has been an indispensable part of all high-pressure discharge tubes, has been eliminated as a result of the present invention. Adapter tubes are used that prevent oxidation of the electrical elements, as well as specially configured electrodes.

REFERENCES:
patent: 2177714 (1939-10-01), Hagen et al.
patent: 3248590 (1966-04-01), Schmidt
patent: 3650593 (1972-03-01), Kerekes
patent: 3693007 (1972-09-01), Kerekes
patent: 3821587 (1974-06-01), Liberman et al.
patent: 3898494 (1975-08-01), Levy

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