Incandescent lamp having a vessel with an annular reflective...

Details Incandescent lamp having a vessel with an annular reflective... Incandescent lamp having a vessel with an annular reflective...

H - Electricity

01

K

313/185, 313/84,

H01K 1/14 (2006.01) H01K 1/32 (2006.01)

Patent

CA 1265840

ABSTRACT: The electric incandescent lamp according to the invention has an annular mirror coating (10) on a hemi- spherical part (7) of its lamp vessel (1) and a filament (5) arranged zigzagwise between supporting points (12,13), which are located on the surface of an imaginary cone (14). The filament (5) is situated outside the part of the lamp vessel provided with the mirror coating (10). The lamp is particularly suitable for use as a traffic signal lamp and produces together with an external paraboloidal reflector a light beam of high luminous intensity at the centre and in directions enclosing a small angle with the axis of the beam, as a result of which the lamp may be designed for a comparatively low power. Figure.

521145

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