Illumination – Light source substitution
Patent
1990-03-16
1991-07-16
Husar, Stephen F.
Illumination
Light source substitution
362 20, 362804, F21V 1904
Patent
active
050329626
ABSTRACT:
A mechanism for positioning one of a plurality of lamps, each carried by a lamp socket, at a desired focal point of an optical system is comprised of a first lamp socket positioned in an operative position such that a lamp carried by that socket will be at a desired focal point of the optical system. At least one other lamp socket is positioned in an inoperative position. A mechanism for enabling movement of the first lamp socket from the operative position to an inoperative position while simultaneously moving the other lamp socket from the inoperative position to the operative position is provided. The present invention enables a failed lamp to be replaced by a backup lamp in such a manner that no degradation or change in optical performance occurs.
REFERENCES:
patent: 1915081 (1933-06-01), Berg
patent: 1987532 (1935-01-01), Koito
patent: 4225901 (1980-09-01), Luce
patent: 4458179 (1984-07-01), Bainbridge et al.
patent: 4734625 (1988-03-01), Geanous et al.
Pamphlet-CHROMOPHARE Models C959 and C570, "A new era in surgical lighting", Martin (not date given).
Gehly Joel
Mackowski David
Zolner David
American Sterilizer Company
Husar Stephen F.
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