Abstract: We provide a radiotherapy apparatus including a source of therapeutic radiation, a source of imaging radiation having an energy level less than that of the therapeutic radiation, a detector for radiation lying within the field of both the therapeutic radiation and the imaging radiation and able to image both, a first imaging circuit supplied with the output of the detector, a second imaging circuit also supplied with the output of the detector, a first pulse trigger circuit adapted to trigger the source of therapeutic radiation to produce a pulse of therapeutic radiation and to trigger the first imaging circuit to capture an output of the detector; and a second pulse trigger circuit adapted to trigger the source of imaging radiation to produce a pulse of imaging radiation and to trigger the second imaging circuit to capture an output of the detector.

Abstract: The present invention is for method and means for purification of water using reversed osmosis. Water is forced through a membrane element (10) under pressure, which is obtained by a high pressure pump (2), where the water which is supplied to the element (10) is both from the outside supplied, unpurified water and internally circulated water that has passed by the element at its inlet side. The high pressure pump operates intermittently and the quantity of water that is circulated internally is at least as large as the quantity of water that is supplied from the outside. After that the pressure has been reduced there is a time delayed flush cleaning of the element (10) by flushing with water that is supplied from outside.

Abstract: A grinding machine with a movable grinding stand on a rigid frame structure where the grinding stand is rotatable on a cross travel carriage and steps are taken to prevent vibrations caused by the drive motor of the grinding wheel be propagated to the grinding wheel.