Abstract: A revolving security door for the controlled passage of persons from a non-protected environment to a protected environment, for example a bank, which permits the normal transit of persons even in the event of the interception of an unwelcome person, including a cylindrical chamber formed inside a structure, a turnstile rotatable within the chamber in a predetermined sense of rotation and having sectors each for accommodating a person, an entry aperture and an exit aperture formed in the structure, a sensor associated with the structure for detecting an unwelcome person or object and for emitting an alarm signal, an emergency door associated with the exit aperture and activated to close by the said alarm signal, the said door comprising a first panel and a second panel which are held together and made to rotate in the opposite sense of rotation from that of the turnstile, after the door has been closed by the first panel and before the door is opened by the opening of both panels.

Abstract: In a security vestibule entry for controlled access to banks and the like enclosures, two walls of the vestibule have substantially circular arc bases, different diameters, and respective angular breadths whose sum is at least 360.degree., being mounted on respective concentrical circular tracks and forming vestibule doors. The security vestibule is reliable, simple in construction, and compact in size.

Abstract: This security entrance is of the box-type with interlocked doors, and comprises an armoured vestibule having one door communicating with the bank and one door communicating with the exterior; a third door can be opened into a discharge space separate from the bank. This third door is controlled by a metal detector of known type.