Electric incandescent lamp

Details Electric incandescent lamp Electric incandescent lamp

H - Electricity

01

K

313/118

H01K 1/50 (2006.01) H01K 1/16 (2006.01) H01K 1/24 (2006.01)

Patent

CA 1126322

1 PHN 9137 ABSTRACT: Electric incandescent lamps having a bromine and hydrogen containing gas filling are also provided with iodine if they are to have a long computed life. This has a protecting influence on the colder tungsten parts of the lamp. However, the use of iodine also exibits disadvantages. In lamps according to the invention the cur- rens inside the lamp envelope is supplied to the coiled coil filament via a helically-wound tungsten wire which is screwed in or around the filament and is in ingage- ment with at least a secondary turn of said filament. This construction enables the omission of the use of iodine.

328300

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