| 摘要 |
A device which is installed as additional hardware and which allows two doors which are separated from each other in a common frame to be secured together and tightly against the doorjamb by engagement of parts mounted on the doors. A spindle with a handle on the interior side passes through the inner door to engage a fixture on the outer door and draw the doors together. A biasing spring and a keeper on the spindle in the space between the two doors are covered by a tamperproof housing which supports and allows axial movement of the spindle for engagement and disengagement with the fixture. The device is easy to engage and disengage by rotation of the handle. The spring clears the end of the spindle from the fixture by inwardly axial movement of the spindle when it is disengaged so that the pair of doors can be opened in the usual fashion with the usual hardware.
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