White smoke generating apparatus and method of using the same

Details White smoke generating apparatus and method of using the same White smoke generating apparatus and method of using the same

1996-02-07

1997-07-22

Bennett, Henry A.

Refrigeration

Storage of solidified or liquified gas

Liquified gas transferred as liquid

62 481, F17C 702

Patent

active

056494270

ABSTRACT:
The present invention provides a white smoke generating apparatus for generating white smoke of a stable density unaffected by air temperature or humidity conditions. The apparatus comprises an apparatus main body 11 being provided with a white smoke discharge opening 11a; a cryogenic liquefied gas supply mechanism 12 for supplying a cryogenic liquefied gas into the apparatus main body 11; and a humidifying mechanism 13 for humidifying the atmosphere inside the apparatus main body. The cryogenic liquefied gas supply mechanism 12 is provided with a first pipeline 18 which communicates a cryogenic liquefied gas reservoir 16 and a cryogenic liquefied gas emission nozzle 17 placed inside the apparatus main body 11, preferably at the white smoke discharge opening 11a side. The humidifying mechanism 13 comprises a second pipeline 24 which branches from the first pipeline 18 and communicates with a spray nozzle 21 placed inside the apparatus main body 11 for spraying water, and a third pipeline 28 which branches from the second pipeline 24 and communicates with the spray nozzle 21 via a water reservoir 25. A cryogenic liquefied gas vaporizer 22 is provided inside the second pipeline 24 upstream from the point where the third pipeline 28 branches from the second pipeline 24.

REFERENCES:
patent: 4771608 (1988-09-01), Liu et al.
patent: 4829773 (1989-05-01), Matsumura et al.
patent: 5331822 (1994-07-01), Belliveau et al.

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