Abstract: The scintillator uses a luminescent crystal (5) under the action of an ionizing radiation. It is particularly intended for use at high temperatures and accelerations. The crystal (5) is surrounded by PTFE powder (11) which is sintered cold and then conditioned hot and under pressure.

Abstract: The present invention relates to a safety tool-holder for machine-tools, comprising:a quill in which is axially cut a through-opening, said quill being mounted in a body integral with the machine-tool;a rod placed in the axial opening of the quill, a first end of which rod comprises gripping means adapted to grip a tool head, whereas the second end comprises a threaded portion;axial elastic return movement means, resting, first against the quill, and second, against a nut screwed on the threaded portion of the rod and making it possible to hold the latter in working position;means for continuously controlling the rod in its working position, which means detect the variation of the elastic deformation of the nut under the action of the elastic return means.The invention finds an application in machine-tools, such as milling machines.

Abstract: The disclosure relates to band compression devices. The input signals are sampled and stored in at least two memories. In a sequence of n samples, two samples are taken in pairs, compared and the greatest of them is transferred to an output memory from which it can be read for a period equal to or less than the duration of the sequence. When using a non-shifting mode, the output memory is reset at the end of each sequence of n samples. A shifting mode is used in a device comprising a plurality of identical stages connected in series, where each new sample is transmitted to the next stage only if it is greater than the previous stored sample in each stage.