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Air driven random ball type lot mixer

  • US 5,121,920 A
  • Filed: 08/03/1990
  • Issued: 06/16/1992
  • Est. Priority Date: 08/03/1990
  • Status: Expired due to Fees
First Claim
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1. A random number generator comprising:

  • a housing which comprising a single mixing chamber, an air chamber, an air distribution plate disposed between said mixing chamber and said air chamber, and a ceiling formed by an upper vertically tapered plate;

    a plurality of numbered balls disposed within said mixing chamber;

    a means for providing an upflow air stream disposed within said air chamber which is capable of mixing and propelling said balls upward within said mixing chamber; and

    a plurality of ball collection columns attached to said ceiling of said housing adjacent to, but not disposed within, said mixing chamber, each ball collection column comprising a means for withdrawing at least one of said balls from said mixing chamber into said ball collection column and a means for retaining said ball within said ball collection column;

    whereby a combination of numbered balls from said mixing chamber may be collected within said ball collection columns so as to provide a random list of numbers and whereby the balls do not get trapped between the ceiling of said housing and said ball collection columns.

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