Electric lamp having a partly mirrored lamp envelope

Details Electric lamp having a partly mirrored lamp envelope Electric lamp having a partly mirrored lamp envelope

H - Electricity

01

K

313/85

H01K 7/02 (2006.01) H01K 1/28 (2006.01) H01K 1/32 (2006.01)

Patent

CA 1155901

PHN. 9536 ABSTRACT: 7 Electric lamps having a lamp envelope which is partly mirrored with aluminium, chromium or silver have a cold look, which is not the case with lamps having a gold or imitation gold mirror. However, gold has a poor adhesion to glass, while imitation gold mirrors have to be built up from several pairs of copper and aluminium layers, which involves a high cost price. In lamps accord- ing to the invention the lamp envelope is transparent smoke-coloured at least at the area of the silver coloured mirror, by means of a lacquer layer, an enamel layer, or the use of smoke-coloured glass for the lamp envelope.

355320

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