Compact high efficacy fluorescent lamp

Details Compact high efficacy fluorescent lamp Compact high efficacy fluorescent lamp

1987-01-13

1988-09-20

Moore, David K.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313609, 313634, H01J 6130, H01J 6133

Patent

active

047728191

ABSTRACT:
Low-pressure mercury vapor discharge lamp having a tubular discharge vessel arranged within a lamp envelope. The discharge vessel consists of two, preferably generally helically bent tube parts which are connected together by a coupling joint which intersects the tube parts at a location spaced from their sealed ends remote from the electrodes. A cool area is formed in the discharge vessel near this coupling joint to control vapor pressure.

REFERENCES:
patent: 3895248 (1975-07-01), de Vrijer
patent: 4324447 (1982-04-01), van der Wolf et al.
patent: 4337414 (1982-06-01), Young
patent: 4383200 (1983-05-01), van Zon et al.
patent: 4546284 (1985-10-01), Renardus et al.
patent: 4603277 (1986-07-01), Imamura et al.

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