Lamp reflector with downwardly-facing step

Details Lamp reflector with downwardly-facing step Lamp reflector with downwardly-facing step

1977-06-02

1979-04-10

Nelson, Peter A.

Illumination

Light modifier

Reflector

362297, 362346, F21V 700

Patent

active

041492293

ABSTRACT:
A lamp assembly has a reflector body formed of an injection moulded, low profile, thermoset polyester moulding composition with an integral sleeve having a stop internally of the body. A tubular bulbholder has an external flange engaging against the stop and carries a bulb. The reflector body has upper and lower paraboloidal portions of different focal length joined together by a step facing the lower paraboloidal portion. The step decreases in width inwardly from the periphery of the reflector body. The lower paraboloidal portion has a greater focal length than the upper paraboloidal portion which projects forwardly away from the rear of the reflector body to a greater extent than the lower paraboloidal portion. A mounting flange around the reflector body has a planar surface against which a lens element engages. The mounting flange is disposed between shield and the rear of the reflector body.

REFERENCES:
patent: 1702746 (1929-02-01), Prichard
patent: 1995012 (1935-03-01), Rivier
patent: 3688149 (1972-08-01), Pitkjaan
patent: 3754132 (1973-08-01), Mamrud et al.

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