| 摘要 |
<p>A closing control for a double door comprising a first leaf (11) and second leaf (12), to ensure that the first leaf (11) closes before the second leaf (12), comprises respective door closing means (13) for the leaves (11, 12), which door closing means (13) will hold the respective door leaf (11 or 12) in an open position if the leaf is opened beyond a determined angle, and an abutment arm (20) movable between an initial position (shown dotted) and an extended position (shown in full lines). The closing control includes electro-magnetic holding means (26) to maintain the arm (20) in its initial position until a control signal is generated by a closing movement of at least one of the leaves (11, 12) of the door and for operation of at least one of the door closing means (13). An electronic control circuit is provided for sensing operation of the door closing means (13) and is connected also to the holding means (26) and to a fire detector such as a smoke sensor. <IMAGE></p> |
