Discharge lamp having an amalgam within a barrier means

Details Discharge lamp having an amalgam within a barrier means Discharge lamp having an amalgam within a barrier means

1996-05-23

1998-10-27

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Screen

313550, 313562, H01J 162

Patent

active

058281690

ABSTRACT:
In a fluorescent lamp with amalgam, a surface of the amalgam is covered by a barrier having at least one opening through which mercury atoms can move to a discharge space of the lamp from the amalgam while the lamp is being lighted. When the lamp is switched off, the barrier restricts the return of the mercury atoms from the discharge space to the amalgam. The amalgam solidifies faster than all the mercury atoms return to the amalgam, so that a lot of mercury atoms remain in the discharge space. When the lamp is re-lighted, an initial mercury vapor pressure can be maintained. Thus, the lamp illuminates at a predetermined intensity of the luminance from the beginning of the re-lighting.

REFERENCES:
patent: 3913999 (1975-10-01), Clarke
patent: 4020378 (1977-04-01), Morehead
patent: 5006755 (1991-04-01), Wittmann et al.
patent: 5055738 (1991-10-01), Yorifuji et al.
patent: 5204584 (1993-04-01), Ikeda et al.
patent: 5294867 (1994-03-01), Grossman
patent: 5412289 (1995-05-01), Thomas et al.
Journal of IES, Apr. 1997, pp: 141-147, "Some New Mercury Alloys For Use In Flurorescent Lamps", J. Bloem, A Bouwknegt and G.A. Wesselink.

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