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LIGHTING DEVICES

  • US 3,840,734 A
  • Filed: 10/17/1973
  • Issued: 10/08/1974
  • Est. Priority Date: 10/19/1972
  • Status: Expired due to Term
First Claim
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1. A lighting device, comprising a main housing cast in metal with cooling fins therein, a cup-shaped reflector mounted in a cup-shaped cavity in the reflector, a glass cover-plate sealed over the mouths of the cavity and reflector, a tuNgsten-halogen electric lamp mounted in the housing and projecting through an aperture in the rear of the reflector with the filament of the lamp at the focus of the reflector, a ceramic ring mounted in a bore in the metal housing and in heat-conducting contact therewith, a metal ring closely fitting a bore in the ceramic ring, a flange on the lamp in close contact with the said metal ring, a spring urging the said lamp, flange, metal ring and ceramic ring forwardly to the position in which the said filament is at the said focus, a cover-plate sealed over the rear of the housing, and a supply cable sealed through an entry into the housing.

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