Access control device

Details Access control device Access control device

G - Physics

07

C

342/11.1

G07C 9/00 (2006.01) G07C 9/02 (2006.01)

Patent

CA 2033088

- 9 - ABSTRACT OF THE DISCLOSURE ACCESS CONTROL DEVICE This access control device has at least one local control device (10) connected to a central control device (11) containing a local computer (18), an issuing station (12) for control cards and a lockable entry installation (13). At the issuing station (12) are issued portable control cards (47) with an electronic storage, comparator and transmitter circuit on which an electronic identity number is stored at each issue. A transmitting device (21) fitted at the entry installation (13) transmits a continuous series of signals corresponding to identity numbers recognized by the local computer (18) as valid. As soon as the comparator circuit finds a correspondence between transmitted and stored identity numbers, the transmission circuit of the control card is activated to send a release signal to open the entry installation, whereby the power to transmit the release signal is taken from the signals transmitted by the transmission device.

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