Higher efficiency incandescent lighting units

Details Higher efficiency incandescent lighting units Higher efficiency incandescent lighting units

H - Electricity

01

K

313/10, 315/68

H01K 5/00 (2006.01) H01K 1/48 (2006.01) H01K 1/62 (2006.01)

Patent

CA 1246659

HIGHER EFFICIENCY INCANDESCENT LIGHTING UNITS ABSTRACT OF THE DISCLOSURE An improved high efficiency general service incandescent lighting unit is disclosed. The lamp has coaxial outer and inner envelopes. The inner envelope has a low voltage filament coaxially disposed therein, a halogen gas atmosphere and a fill-gas at a high pressure. The outer envelope has a coating of a light transmissive reflective infrared film on its inner surface. Further disclosed are various control systems for reducing a typical 120 v. A.C. voltage and applying the reduced A.C. or D.C. voltage across the low voltage filament within the inner envelope.

462519

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