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CONTROLLED ACCESS SECURITY SYSTEM

  • US 3,701,100 A
  • Filed: 12/16/1970
  • Issued: 10/24/1972
  • Est. Priority Date: 12/16/1970
  • Status: Expired due to Term
First Claim
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1. A security system for use with multiple entrances into two or more secured areas for controlling admission to the areas wherein an individual is to be admitted to all or only a part of the secured areas and wherein the areas for an individual are designated, and individuals desiring admission to the secured areas are provided with badges having numbers encoded in such a badge, comprising:

  • a central unit adapted to receive a data file therein for storing a list of badge numbers for which admission to a secured area is permitted and also storing a list of coded symbols representative of a plurality of secured areas to which an individual is to be selectively and controllably admitted;

    therebeing at least two entrances associated with selected ones of the secured areas;

    at least a pair of badge reader means connected to said central unit, said badge reader means being adapted to be installed in proximity of the entrances;

    comparator means included in said central unit and supplied with signals from said badge reader means and the data list in said central unit, said comparator means comparing the signals provided thereto to determine whether or not the number indicated for the badge of an individual is listed among those for whom access to a secured area is indicated, and forming an output signal;

    means connected to said comparator means and receiving the output signal for signalling to the individual presenting the badge that admission to a secured area has been determined;

    means associated with each of said badge reader means for forming a unique signal indicative of particular badge reader means, said means being further connected to said central unit; and

    , second comparator means included in said central unit and being provided with signals from said means associated with said badge reader means and also from the data list in said central unit indicative of the particular secured areas, said second comparator means forming an indication that the individual presenting the badge to said badge reader means shall be admitted to or denied admission to a selected secured area dependent on the comparison by said second comparator means.

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