Compact low pressure mercury vapour discharge lamp

Details Compact low pressure mercury vapour discharge lamp Compact low pressure mercury vapour discharge lamp

H - Electricity

01

J

313/135

H01J 61/30 (2006.01) H01J 61/32 (2006.01) H01J 61/72 (2006.01)

Patent

CA 1269133

ABSTRACT A compact low-pressure mercury vapour discharge lamp comprises two or more straight tubes which are intercon- nected by arcuate connecting means (12) to form a dis- charge chamber between two electrodes (9). These elec- trodes are located in the distal ends (2,3) of the lamp, and the ends (2,3) are connected in a gas-tight manner to a lamp base (8) incorporating necessary contact pins (6,7) and electrical conductors (8). The interconnecting means (12) presents a spine (13) which extends along the means (12). When seen in cross- section, the spine (13) exhibits an acute angle which defines a condensation space for condensation of mercury vapour used in the lamp. As a result of the shape of the spine (13) the mercury vapour condenses outside the circular cross-section area (14) where the positive column is formed during operation of the lamp, the discharge current passing in this column.

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