Electric lamp and discharge devices – With gas or vapor – Having electrode lead-in or electrode support sealed to...
Patent
1981-08-27
1984-10-02
Moore, David K.
Electric lamp and discharge devices
With gas or vapor
Having electrode lead-in or electrode support sealed to...
313625, H01J 1716
Patent
active
044750617
ABSTRACT:
A high-pressure discharge lamp having a ceramic discharge vessel comprising an ionizable filling which in the operating condition of the lamp comprises a component present in excess, and in which two electrodes are present. The electrode is connected to a pin-shaped current supply member which is surrounded with a small annular gap by an end portion of the discharge vessel. The pin-shaped current supply member and the end portion are connected in a gas-tight manner by means of a glass seal, in which the sealing glass seal extends into the small annular gap in the direction towards the electrode over such a distance that, in the operating condition of the lamp, the temperature at the surface of the glass seal facing the discharge is at least 50 degrees K. lower than the temperature of that part of the filling which determines the vapor pressure of the component present in excess.
REFERENCES:
patent: 3234421 (1966-02-01), Reiling
patent: 3498714 (1970-03-01), Elmer
patent: 4065691 (1977-12-01), McVey
patent: 4156826 (1979-05-01), Hernqvist
patent: 4161672 (1979-07-01), Cap et al.
patent: 4283652 (1981-08-01), Van Herck et al.
Fitzgerald John
Jacobs Cornelis A. J.
Van De Weijer Martinus H. A.
Moore David K.
Smith Robert S.
U.S. Philips Corporation
Wieder K.
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