High pressure discharge lamp

Details High pressure discharge lamp High pressure discharge lamp

1986-11-14

1988-06-07

Moore, David K.

Electric lamp and discharge devices

With gas or vapor

Having electrode lead-in or electrode support sealed to...

313331, 313632, H01J 6106, H01J 6136

Patent

active

047499052

ABSTRACT:
A high pressure discharge lamp includes a glass enclosure defining a hermetically sealed discharge space filled with an ionizable gas. A pair of electrodes extend into the discharge space, each electrode having a connection end and a discharge end, between which electrodes, in the operating condition of the lamp, a discharge takes place. A pair of holding portions on opposite sides of the glass enclosure and hold the respective connection ends of the electrodes. Metal lead foils connected to the connection ends are sealed in the holding portions. One or both of the connection ends is shaped, e.g., as a conical frustrum or as a wedge, such that the thickness of its inner end is reduced with respect to the thickness of its outward end. The joining portion of the glass enclosure is internally necked at a position adjacent the reduced thickness portion of the connection end.

REFERENCES:
patent: 3633061 (1972-01-01), Paquette
patent: 4303848 (1981-12-01), Shimizu et al.

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