Controlled gate system with electromagnetic locking mechanism

A controlled gate system for use in a restricted passage having an entry end and an exit end, said system comprising a barrier gate secured to a pivotal support assembly at said exit end to permit said barrier gate to pivot from a closed position, obstructing said restricted passage, to an open position outwardly of said restricted passage;

• electrically actuable arresting means to lock said barrier gate at said closed position, detection means to detect the presence of a person at said entry end, control circuit means for receiving an entry signal from said motion detection means to condition said electrically actuable arresting means to unlock said barrier gate during a predetermined time period after receiving said entry signal to permit passage through said barrier gate, electromagnetic connection means to connect said barrier gate to said pivotal support assembly and disconnect means to disengage said electromagnetic connection means and said actuable arresting means to permit said barrier gate to pivot outwardly and inwardly of said restricted passage to permit passage from said exit end to said entry end and vice-versa during predetermined detected events by said control circuit means.