| 摘要 |
<p>A security maintenance system includes an area keyport adjacent a locked barrier at the entrance of a restricted area with a master console disposed remote from the area keyport. The master console has a plurality of individual master keyports. Coded key means are provided for insertion into the area keyport and a master keyport. Scanning means are provided for the master console in conjunction with comparison means between the area keyport and master keyports for cyclically scanning the keyports and inactivating the locked barrier to permit entry to the restricted area when the area keyport and master keyport have identical coded key means inserted therein.</p> |
