H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/135
H01J 61/36 (2006.01) H01J 61/82 (2006.01)
Patent
CA 1161098
PHN . 9838 13 ABSTRACT: The invention relates to a high-pressure dis- charge 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 con- nected to a pin-shaped current supply member which is surrounded with a small gap by an end portion of the dis- charge vessel. According to the invention 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 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 K lower than the temperature of that part of the filling which determines the vapour pressure of the com- ponent present in excess. Herewith a high-pressure dis- charge vessel is obtained in which attack of the glass seal by components of the lamp filling is prevented.
385178
Fitzgerald John
Jacobs Cornelis A.j.
Van de Weijer Martinus H.a.
Koninklijke Philips Electronics N.v.
Van Steinburg C.e.
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