Low-pressure mercury vapour lamp containing amalgam

H - Electricity – 01 – J

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H01J 61/28 (2006.01) C22B 5/16 (2006.01) H01J 61/24 (2006.01) H01J 61/32 (2006.01) H01J 61/72 (2006.01)

Patent

CA 1239978

ABSTRACT: A low-pressure mercury vapour discharge lamp comprises a discharge vessel which is sealed in a vacuum-tight manner and has at least two parallel tube parts (1,2) arranged beside each other and connected to each other at or near their one ends (3). During opera- tion a cool area (4,5) is present in the discharge vessel near the connection (3). The discharge vessel contains an amalgam (13) for controlling the mercury vapour pressure in the discharge vessel during operation of the lamp in order to prevent condensation of mercury occurring at the cool area.

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