Mercury lamp of the short arc type

Details Mercury lamp of the short arc type Mercury lamp of the short arc type

1998-02-09

1999-11-02

Patel, Vip

Electric lamp and discharge devices

With gas or vapor

Electrode composition

313184, 313630, F01J 6106

Patent

active

059777095

ABSTRACT:
A mercury lamp of the short arc type with a high degree of maintenance of irradiance is achieved in a mercury lamp of the short arc type by the cathode containing thorium oxide and having a tungsten carbide layer on its surface except at tip end area, by at least one of the cathode or anode being provided with metallic tantalum, and by the condition 1.56.ltoreq.VT/SC being satisfied, where SC is the area of the tungsten carbide layer (cm.sup.2) and VT is the volume of the metallic tantalum (mm.sup.3). Alternatively, a high degree of maintenance of irradiance can be achieved in a mercury lamp of the short arc type by the condition 0.043.ltoreq.VT/VW being satisfied, where VW is the volume of the anode (cm.sup.3) and VT is the volume of the tantalum in the lamp bulb (mm.sup.3).

REFERENCES:
patent: 3548242 (1970-12-01), Ayotte et al.
patent: 3621322 (1971-11-01), Rehmet et al.
patent: 4881009 (1989-11-01), Passmoree
patent: 5081396 (1992-01-01), Schneider et al.
patent: 5447763 (1995-09-01), Gehlke
patent: 5654606 (1997-08-01), Weijtens et al.
patent: 5744905 (1998-04-01), Mehrota et al.
patent: 5847498 (1998-12-01), Mehrotra et al.
Patent Abstracts of Japan, vol. 014, No. 584 (E-1018), Dec. 27, 1990 & JP 02 256150 A (Ushio Inc.) Oct. 16, 1990 * Abstract *.
Patent Abstracts of Japan, vol. 095, No. 008, Sep. 29, 1995 & JP 07 122234 A (Matsushita Electric Ind. Co. Ltd.), May 12, 1995 * Abstract *.

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