Abstract: A spatially movable device 1 is disclosed which is provided with actuators 7a-7f in such a manner that the system consists of a manual unit 2 with a process control unit 5 and a input unit 6 as well as a monitor 8. The manual unit 2 is operated in such a manner that the control elements 3a-3f are controlled by an operator's hand which through individual fingers controls the selection of various position parameters. A slider 4 is provided which controls the direction and speed of the selected parameter change with the slider being accessible to the thumb of the operator in order to provide complete operation by one hand and simultaneously setting and controlling the parameter values which are displayed on the monitor 8.

Abstract: A tube for irradiation equipment for limiting an emergent beam, with a baseplate, possessing a central aperture, intended for attaching to the equipment, as well as four carrier plates, each of which possesses a limiting edge and a sliding edge located at right angles thereto. The carrier plates are located parallel to the baseplate, the limiting edge of each carrier plate resting against the sliding edge of the adjacent carrier plate and each of the two mutually opposite pairs of carrier plates being displaceable, parallel to the direction of its sliding edges and symmetrically to the center of the transmission aperture, for the purpose of continuously varying the transmission aperture defined by the limiting edges, during which displacement each of the displaced carrier plates carries with it the carrier plate, resting against the limiting edge of the former plate, parallel to the direction of the limiting edge of the latter plate.