Faceted par lamp

Details Faceted par lamp Faceted par lamp

2007-05-17

2009-08-18

O'Shea, Sandra L (Department: 2875)

Illumination

Light source and modifier

Including reflector

C362S297000, C362S309000, C362S329000, C362S519000, C313S113000, C313S110000, C313S579000

Reexamination Certificate

active

07575343

ABSTRACT:
A PAR lamp (10) has a body (12) with an internal reflector surface (14) disposed about a longitudinal axis (16). A cavity (18) is provided at one end (20) of the body (12) and an arc discharge tube (22) that provides a substantially spherical light source is positioned in the cavity (18) and disposed on the longitudinal axis (16). A cover receiving opening (24) is provided at a second end (26) of the body and a cover (27) closes the cover receiving opening (24). A plurality of spiral facets (28) is formed on the internal reflector surface (14), the plurality of spiral facets (28) being sufficient in number to increase the maximum beam candle power and decrease the beam angle when compared to faceted lamps having a lesser number of facets. The number of facets is equal to or greater than 75 and preferably is 100.

REFERENCES:
patent: 2596697 (1952-05-01), Krefft
patent: 5272408 (1993-12-01), Levin et al.
patent: 6078128 (2000-06-01), Gagnon et al.
patent: 6086227 (2000-07-01), O'Connell et al.
patent: 2006/0007688 (2006-01-01), Hough
patent: 2007/0091607 (2007-04-01), Powell

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