Low pressure mercury vapor discharge lamp

Details Low pressure mercury vapor discharge lamp Low pressure mercury vapor discharge lamp

1991-09-20

1993-04-20

DeMeo, Palmer C.

Electric lamp and discharge devices

Having vapor generating material

Mercury vapor material

313490, H01J 6120, H01J 6142

Patent

active

052045846

ABSTRACT:
A low pressure mercury vapor discharge lamp having a suitable combination of a main amalgam and an auxiliary amalgam. The main amalgam has a mercury vapor pressure not less than a third as much as a mercury vapor pressure of pure mercury at a temperature between 0.degree. C. and 50.degree. C. The auxiliary amalgam has a mercury vapor pressure not less than a third as much as the mercury vapor presure of said main amalgam at a temperature between 0.degree. C. and 50.degree. C. Such a combination is advantageous in that the mercury vapor pressure of the lamp is maintained at a certain level in the low and middle tube wall temperature area and that the luminous output is maintained at a high level in that temperature area, and also that the increasing speed of luminous flux of lamps using these amalgams during a starting period (a luminous flux increasing characteristic) is fast nevertheless, in the low and middle tube wall temperature area.

REFERENCES:
patent: 4047071 (1977-09-01), Busch et al.
patent: 4093889 (1978-06-01), Bloem et al.
patent: 4972118 (1990-11-01), Yorifuji et al.
patent: 5055738 (1991-10-01), Yorifuji et al.

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