US 5,493,170 A · High efficiency sealed beam reflector lamp

Abstract

A reflector lamp having a lens of vitreous material fused to a reflector body of vitreous material. An inner reflector surface of the reflector body includes a reflective coating having a first coating portion extending from the rim of the reflector body and a second coating portion extending from a location spaced from the rim towards a basal end of the reflector body. The second coating portion is a layer of silver and the first coating portion is a layer of material other than silver, such as aluminum, having a higher resistance to damage by high heat in the rim area during fusing of the lens to the reflector body. Higher efficacies are achieved with the silver layer spaced from the rim than with silver covering the entire reflector surface.

Claims15

Dependent claims

A reflector lamp comprising

a reflector body of vitreous material having a longitudinal axis, said reflector body including a basal portion, a rim which defines a light-emitting opening of said reflector body, and an inner reflector surface which extends from the neck portion to the rim of the reflector,
a lens of vitreous material fused to said rim,
a light source arranged within said reflector body, and
a reflective coating on said inner reflector surface, characterized in that:
said reflective coating comprises a first coating portion extending from said rim towards said neck portion and a second coating portion which extends from an axial position spaced from said rim to said basal portion, and said second coating portion consists essentially of silver and said first coating portion consists essentially of a first material other than silver.

2 more elements

Dependencies are inferred from the claim text.

High efficiency sealed beam reflector lamp

Life of this patent

High efficiency sealed beam reflector lamp

Life of this patent

Abstract

Claims15