Patent ID: 8733017

Claim:
A gate unit comprising a doorway barrier including a gate mount adapted to mate with a door frame bordering a doorway and a gate mounted on the gate mount for pivotable movement about a pivot axis between a closed position closing a walkway passage formed in the gate mount to block movement of a person through the walkway passage and an opened position opening the walkway passage to allow movement of a person through the walkway passage, a releasable latch mounted for movement relative to the doorway barrier to engage the gate and the gate mount simultaneously to retain the gate in the closed position to establish a locked mode of the gate, gate-open signaler means for moving the gate about the pivot axis from an unlocked mode and the closed position through a displacement angle to the opened position automatically to establish the opened position and the unlocked mode of the gate thereby providing a visual lock-status signal to a nearby observer that the gate is located in the opened position and maintained in the unlocked mode, wherein the gate-open signaler means includes a cam having a ridge, the cam mounted for rotation about the pivot axis in a first chamber formed in the pivot support of the hinge and coupled to the pivot to rotate therewith and a cam rotator having a nose, the cam rotator coupled to the first wall panel and configured to provide means for rotating the cam about the pivot axis to cause the pivot and the gate coupled to the pivot to rotate as a unit about the pivot axis to move the gate to the opened position unless the gate is retained in the closed position and maintained in the locked mode, and further wherein in the closed position the nose and the ridge are aligned and abutting each other.