Illumination – Light source and modifier – With sealing means or artificial atmosphere
Patent
1986-06-13
1987-07-28
Hart, Douglas
Illumination
Light source and modifier
With sealing means or artificial atmosphere
362158, 362307, F21V 2900
Patent
active
046835237
ABSTRACT:
An elongate metal cylindrical body has a plurality of internal annular grooves for adjustable positioning of a lamp socket. A cylindrical metal sleeve screws over the forward end of the metal body. A quartz-halogen lamp extends through the forward end of the sleeve and tube and its contacts are received in corresponding receptacles in the socket. A cylindrical heat sink is screwed inside the metal sleeve and surrounds the base of the lamp, closely spaced therefrom. A relatively small protective glass envelope fits over the lamp and heat sink. The tapered rearward end of the glass envelope is held within a cavity in the forward end of the metal sleeve by a special radial seal, including an O-ring and a spiral retaining ring. The special seal also minimizes cracking of the envelope while providing a barrier to the entry of water under high pressure. A readily removable reflector assembly fits over the forward ends of the cylindrical metal body and sleeve and includes a perforated dome-shape protective cover. The rear end of the cylindrical metal body accommodates a variety of standard bulkhead electrical connectors.
REFERENCES:
patent: 2051479 (1936-08-01), Hastings
patent: 3652846 (1972-03-01), Starck
patent: 4368508 (1983-01-01), Gantenbrink
Hagey William H.
Olsson Mark S.
Rosenthal Brock J.
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