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Apparatus and method for controlled access to a secured location

  • US 5,451,757 A
  • Filed: 04/22/1990
  • Issued: 09/19/1995
  • Est. Priority Date: 04/22/1990
  • Status: Expired due to Fees
First Claim
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1. A method for obtaining selective access to a cash-receiving device having means for preventing unauthorized access to cash box, comprising the steps of:

  • generating an access message containing a present access code for a present access to a particular cash-receiving device an a new access code for a subsequent authorized access to the device;

    entering that access message into a portable terminal separate from the device;

    transferring the portable terminal to the device;

    entering into the portable terminal a personal identification number (PIN) for a certain person authorized to access the device;

    comparing the PIN entered into the portable terminal with a PIN known to the portable terminal and producing a certain logic state only when the entered PIN bears a predetermined relation to the known PIN;

    transferring the access message from the portable terminal to the device only when the certain logic state is produced;

    comparing the present access code in the transferred access message with an access code stored at the device to provide an authorization signal allowing access to the cash box only when a predetermined relation exits between the present and the stored access codes; and

    in response to the predetermined relation between access codes, replacing the access code stored in the device with the new access code in the access message so that the transferred new access code becomes stored at the device for comparison with a subsequent present access code when a subsequent access is sought to the cash box a the particular device.

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