Abstract: A door which can be automatically opened and closed can have an additional releasable connection for allowing the door panels to be manually opened by disengaging the door panels from the device for automatically opening and closing the doors. In particular, two-panel doors which execute a combined sliding and rotational motion around a vertical axis of rotation during the closing and opening motion can be configured with such a device to make it possible to use the doors in evacuation and emergency routes, i.e. routes in which a manual force can be applied from inside to open the door panels. Further, so that the door does not remain open, there can also preferably be switches or circuits in the construction which indicate that a manual opening of the door panels has occurred, in which case an electronic signal can be generated to place the drive device in motion, to thereby automatically restore the connection between the door panels and the drive system.

Abstract: The detector of the invention relates to the field of X or gamma photon detection. It is particularly adapted as a measuring chamber in conventional radiology and as a detector in scanography.It comprises at least one transformer for transforming X or gamma photons into light photons and at least one transformer for transforming light photons into electric signals representative of the energy of the incident X or gamma photons. The transformer for transforming X or gamma photons into light photons comprises a photoconducting layer and an electroluminescent layer between two electrodes which are brought to a biasing potential. The transfer electrode may be formed by a Schottky barrier. The transformer for transforming light photons into signals comprises a photosensitive layer, as a photovoltaic cell, on a substrate.