Patent ID: 8292337
Filing Date: 2012-10-23
Classification: E05B,E05C,Y10T

Abstract:
1. A device for controlling a door, the device comprising; a body; an electromagnet coupled to the body by a coupling device such that the electromagnet is movable via a coupling means between a first position and a second position relative to the body, and the electromagnet arranged to generate a magnetic field for releasably coupling a magnetic element mounted to the door to the electromagnet so as to retain the door in a closed position when the magnetic element is in abutment with the electromagnet and the electromagnet generates the magnetic field, wherein movement of the door from the closed position towards an opened position also moves the electromagnet via a coupling means from a first to a second position relative to the body, a microswitch having an actuator, wherein movement of the electromagnet from the first to the second position, also moves the actuator of the microswitch from a first position to a second position; a current supply that is arranged to supply the electromagnet with a current, and a detector system configured such that the movement of the electromagnet and therefore the actuator from the first position towards the second position ceases the supply of the current at a predetermined instant after the movement of the electromagnet and the actuator from the first to the second position, thereby releasing the magnetic element from the electromagnet such that the door is released from the closed position.