Electric incandescent lamp having truncated conical filament and

Details Electric incandescent lamp having truncated conical filament and Electric incandescent lamp having truncated conical filament and

1988-08-23

1989-09-05

Moore, David K.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Reflector

313115, 313315, H01K 102, H01K 126

Patent

active

048641812

ABSTRACT:
The electric incandescent lamp according to the invention has an annular mirror coating on a hemispherical portion of its lamp envelope and a filament arranged zigzagwise between supporting points which are located on the surface of an imaginary cone. The filament is situated outside the part of the lamp vessel provided with the mirror coating. 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 center 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.

REFERENCES:
patent: 1578920 (1926-03-01), Robinson
patent: 4103201 (1978-07-01), Wosby
patent: 4317060 (1982-02-01), Fitzgerald et al.

Affiliated with

Also associated with

Rating

Electric incandescent lamp having truncated conical filament and does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electric incandescent lamp having truncated conical filament and, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric incandescent lamp having truncated conical filament and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-245416