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System for detaining robbers on premises

  • US 4,461,221 A
  • Filed: 09/30/1982
  • Issued: 07/24/1984
  • Est. Priority Date: 09/30/1982
  • Status: Expired due to Fees
First Claim
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1. A security system for a bank building or the like having a main business area wherein money transactions are carried out, said building being accessible to the public only through one or more lobbies having motor operated outer and inner doors wherein the outer doors allow access between outside the building and the lobbies and the inner doors allow access between the lobbies and the main business area, said system comprising:

  • (a) first manually operable means for opening the outer lobby doors to enter the lobbies from outside the building;

    (b) second manually operable means for opening the inner lobby doors to enter the main business area from inside the lobbies;

    (c) third manually operable means for opening the inner lobby doors to enter the lobbies from the main business area;

    (d) fourth manually operable means for opening the outer lobby doors to exit the lobbies to outside the building;

    (e) means inside the main business area having a plurality of compartments for holding currency, one of said compartments having sensor means therein for detecting the presence or absence of a currency packet in said one of said compartments;

    (f) door locking means for locking said inner and outer lobby doors in a closed position when said sensor means detects the absence of a currency packet in said one of said compartments;

    (g) means for disabling said first, second, third and fourth manually operable means from opening said lobby doors when the latter are locked by said locking means;

    (h) narrow wavelength radio receiver means mounted adjacent said inner lobby doors in said main business area, said receiver means having a limited signal reception range on the order of several feet;

    (i) a miniature radio transmitter concealed in a packet of currency normally disposed in said one of said compartments, said transmitter emitting a radio signal of the same wavelength as said receiver means; and

    (j) means operably connected to said receiver means for temporarily enabling said third manually operable means only to open said inner lobby doors when said transmitter is within the effective receiving range of said receiver.

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