| 摘要 |
The ingress to and egress from an access restricted compartment, such as the cockpit in an aircraft, is controlled by a revolving gate ( 1 ) rotatably mounted in a stationary gate frame ( 2 ). The revolving gate ( 1 ) has a single gate opening ( 11 ) and is rotatable about its central longitudinal axis through predetermined or preselected angular sectors to bring the gate opening ( 11 ) either into alignment with any one opening ( 21 ) of at least two frame openings ( 21 ) at a time, to provide ingress or egress, or to cause said single gate opening ( 11 ) to face a wall ( 2 A) of said stationary gate frame ( 2 ) or a closed door ( 51 ) in said stationary gate frame ( 2 ) to close the gate ( 1 ). In the closed position of the gate ( 1 ) escape from the gate ( 1 ) is prevented by locking the gate in its closed position by at least one arresting bolt that is electrically controllable. The atmosphere in the revolving gate ( 1 ) is also controllable for incapacitating any unauthorized intruder.
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