Low pressure discharge lamp having sintered "cold cathode" disch

Details Low pressure discharge lamp having sintered "cold cathode" disch Low pressure discharge lamp having sintered "cold cathode" disch

1992-08-10

1996-12-17

Peng, John K.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313346R, 313630, 313631, 313633, H01J 61067, H01J 6142

Patent

active

055856942

ABSTRACT:
A fluorescent low pressure discharge lamp is provided with axially mounted cold-cathode electrodes consisting of a sintered shaped mixture of inorganic material including about 50-90% by weight of tungsten and the remainder BaO or a mixture of BaO, CaO and SrO and oxides of Y, Zr or Hf or the rare earths. The electrodes have a uniform density throughout with a porosity of less than 10%.

REFERENCES:
patent: 2389060 (1945-11-01), Kurtz
patent: 2677623 (1954-05-01), Delrieu et al.
patent: 2753615 (1956-07-01), Claude et al.
patent: 3325281 (1967-06-01), Ebhardt
patent: 3563797 (1971-02-01), Young et al.
patent: 3718831 (1973-02-01), Butter et al.
patent: 3758809 (1973-09-01), Menelly et al.
patent: 4303848 (1981-12-01), Shimizu et al.
patent: 4808883 (1989-02-01), Iwaya et al.
patent: 5138224 (1992-08-01), Goldburt et al.

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