Electric lamp and discharge devices – With gas or vapor – Incandescent filament lamp
Patent
1997-11-26
2000-03-07
Husar, Stephen
Electric lamp and discharge devices
With gas or vapor
Incandescent filament lamp
313273, H01K 102
Patent
active
060344733
ABSTRACT:
A lighting system for projecting a beam of light has a light source and a concave reflector having a central axis. The center of the light source is located at a position other than at the focal point of the reflector, i.e. between the reflector surface and the focal point of the reflector for an ellipsoidal reflector and forward of the focal point for a parabolic reflector. This placement provides a greater light output than is achievable by positioning the light source at the focal point of the reflector. The preferred light source is an improved lamp having an incandescent filament having a central linear helical portion aligned with a central axis of the reflector and a peripheral helix portion around the central portion so as to concentrate the emission of light along and about the central axis of the filament.
REFERENCES:
patent: 2218345 (1940-10-01), Spaeth
patent: 3286116 (1966-11-01), Malm
patent: 5072147 (1991-12-01), Pugh et al.
patent: 5268613 (1993-12-01), Cunningham
patent: 5446637 (1995-08-01), Cunningham et al.
Bulb Direct, Replacement Lamps for Your Equipment, formely known as PSC Lamps, Inc., 1997 Catalog.
McBride, Jr. Edward J.
Whitright Kenyon C.
Husar Stephen
Wahl John R.
Wybron, Inc.
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