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Low lying fog simulator and method

  • US 5,676,886 A
  • Filed: 09/27/1996
  • Issued: 10/14/1997
  • Est. Priority Date: 09/27/1996
  • Status: Expired due to Term
First Claim
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1. A special effects apparatus for simulating low lying fog in an environment characterized by an ambient temperature, the apparatus to be used with a smoke generator that provides smoke to the apparatus, the apparatus comprising:

  • a housing forming a chamber having a smoke inlet and an outlet, the housing connectable to the smoke generator for providing smoke through the inlet which passes through the chamber prior to passing through the outlet into the ambient;

    a liquid carbon dioxide source; and

    an expansion valve positioned in the chamber and connected to the source for expanding the liquid carbon dioxide into a cold gaseous carbon dioxide forming a cold gas pocket within the chamber for reducing the temperature of the smoke to a temperature below the ambient temperature prior to the smoke passing through the outlet.

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