Low-power, high-pressure discharge lamp

Details Low-power, high-pressure discharge lamp Low-power, high-pressure discharge lamp

1985-11-26

1988-01-05

Schor, Kenneth M.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313112, 313523, 313634, H01J 6134

Patent

active

047178523

ABSTRACT:
Low-power lamps, that is, lamps having a power rating of less than 250 W, g. less than 100 W, and, for instance 40 W, have an arc tube which has a fill of mercury with additives of metal halides and a noble gas. To permit universal mounting application of the lamp, the arc tube (2) has a single-press seal (3) at one side thereof in which the electrodes are retained, the arc tube being surrounded by an envelope having, likewise, a single-ended, single-press seal (5) located at the same side as the press seal of the arc tube, through which continuation elements (8, 10, 12, 14; 9, 11, 13, 15) of the electrode elements are conducted. The arc tube and the envelope are so closely spaced that heat radiated from the arc tube to the envelope is effectively reflected to the arc tube without substantial radiation by the envelope. The arc tube and/or the envelope may be frosted, and made, respectively, of hard glass or quartz glass which has low transmissivity in the UV and IR ranges of radiation.

REFERENCES:
patent: 2304412 (1942-12-01), Kern
patent: 3479548 (1969-11-01), Schlessel
patent: 3555336 (1971-01-01), Koedam
patent: 3676729 (1972-07-01), Menelly
patent: 3781586 (1973-12-01), Johnson
patent: 4199701 (1980-04-01), Pattacharya
patent: 4321504 (1982-03-01), Keeffe
patent: 4338540 (1982-07-01), Sovilla
patent: 4370587 (1983-01-01), Notelteirs
patent: 4380714 (1983-04-01), Pouman
patent: 4499396 (1985-02-01), Fohl

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