Low-pressure sodium vapour discharge lamp with grooved...

Details Low-pressure sodium vapour discharge lamp with grooved... Low-pressure sodium vapour discharge lamp with grooved...

H - Electricity

01

J

313/126

H01J 61/33 (2006.01) H01J 61/32 (2006.01)

Patent

CA 1129931

1 PHN 9031 ABSTRACT: Low-pressure sodium vapour dis- charge lamp comprising a hollow inner member surrounded by an outer transparent member, the wall of at least one of said members having one or more grooves and the inter- vening portions of that member located between the grooves extending to or near the wall of the other member, a folded discharge path between two electrodes being formed by means of the grooves, which are arranged serially, and with the wall of the other member is present, said inter- venting portions, being located between the grooves and facing the wall of the other member, extend parallel to that wall leaving a gap with said wall having sufficient width and length to prevent short-circuitry of the dis- charge.

321230

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