Abstract: A security system for allowing selective access to a secured area generally comprises first and second three wing center shaft ganged revolving door structures, each partially surrounded by upright facing curved side walls disposed in spaced apart relationship to define a mid-zone. A digital combination lock at the first entryway provides initial access. Any two wings of the revolving doors have an angular span less than that traversed by each side panel to define a lockable detection chamber. A gas ionization explosives detector is coupled to the detection chamber. The mid-zone comprises metal and X-ray detectors and a hand geometry reader. The second revolving door has an entryway actuatable by a pass card reader. The second revolving door provides access to the secure region.In operation, an individual seeking access punches a combination lock releasing the first revolving door allowing the wings to rotate and then lock, enclosing a detection chamber in which the individual is confined.

Abstract: A controller driven revolving door system has facing spaced apart curved panels partially enclosing three equiangularly spaced center shaft coupled wings and defining entry and exit openings. The controller automatically selectively directs traffic flow through the entry and exit openings and is responsive to a microwave motion detector at the entry and a mat switch in a quarter-point position accessable to the exit. A DC motor is coupled by a gearing assembly to the center shaft. The controller monitors current passing through the motor windings sensing shaft rotation. Responsive to the mat switch, the controller applies a resistive load to the DC motor windings to regeneratively brake the rotation of the door. The controller thereafter reverses the polarity of the motor windings causing the door to rotate in a reverse direction and back any individual out of the exit area.

Abstract: A controller driven revolving door system has facing spaced apart curved panels partially enclosing three equiangularly spaced center shaft coupled wings and defining entry and exit openings. The controller automatically selectively directs traffic flow through the entry and exit openings and is responsive to a microwave motion detector at the entry and a mat switch in a quarter-point position accessable to the exit. A DC motor is coupled by a gearing assembly to the center shaft. The controller monitors current passing through the motor windings sensing shaft rotation. Responsive to the mat switch, the controller applies a resistive load to the DC motor windings to regeneratively brake the rotation of the door. The controller thereafter reverses the polarity of the motor windings causing the door to rotate in a reverse direction and back any individual out of the exit area.