Method of preventing undesired passage through revolving door system.

摘要

Undesired passage of a person through a revolving door system (10) whether for security or safety reasons, from a first opening thereinto, the door system (10) comprising a plurality of wings (14) rotatable about an upright axis and a pair of upright opposing panels (20, 22) disposed in facings spaced apart relationship to define a partially enclosed region (24) bounding the wings (14) is prevented by operating sensing means (60) to detect the unintended presence of a person entering the partially enclosed region (24) from the first opening, supplying to controller means (48) a signal to cause the controller means (48) to stop rotation of the wings (14) in a forward rotational direction and then having the controller means (48) actuate rotation of the wings (14) in a direction opposite to the first direction.