R lamp having an improved neck section for increasing the useful

Details R lamp having an improved neck section for increasing the useful R lamp having an improved neck section for increasing the useful

1984-05-22

1985-08-20

Nelson, Peter A.

Illumination

Light source and modifier

Including reflector

362297, 362346, 362347, 313113, F21V 709

Patent

active

045368341

ABSTRACT:
A reflector (R) having an improved neck section that increases the useful light output of the lamp is disclosed. The reflector lamp comprises a concave reflector having a primary reflective surface with a parabolic shape, one or more intermediate reflective surfaces with a parabolic shape substantially confocal with the primary reflective surface, and an improved neck section comprising a reducing section, a first substantially straight cylindrical section, an expanding section and a second substantially straight cylindrical section.

REFERENCES:
patent: 2671183 (1954-03-01), St. Louis et al.
patent: 3250939 (1966-05-01), Dayton et al.
patent: 3279941 (1966-10-01), Foster et al.
patent: 3384781 (1968-05-01), Holle
patent: 4001621 (1977-01-01), Pace et al.
patent: 4041344 (1977-08-01), La Guisa
patent: 4050602 (1977-09-01), Tom et al.

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