ELECTROMECHANICAL DOOR HOLDER - CLOSER

摘要

An electromechanical door holder-closer includes a conventional door closer which has a shaft rotatable in response to movement of a door between its open and closed positions and resilient means for yieldably resisting rotation of the shaft in one direction. A latching mechanism cooperates in a latching position with a uni-directional clutch mounted on the shaft to permit free movement of the door from its closed position toward its open position and to releasably retain the door in a selected hold-open position therebetween when the latching mechanism is held in cooperative engagement with the clutch. The latching mechanism is releasably retained in its latching position by a normally energized electrically operated holding mechanism. Means may be provided for adjusting the device from one hold-open position to another hold-open position of lesser opening by manually moving the door toward its closed position and to its new hold-open position while the latching mechanism is held in latched position by the holding mechanism. Means is also provided for overriding the latching and holding mechanism to release the door from its hold-open position in response to manual force applied thereto in the closing direction.