Abstract: An x-ray examination apparatus has an x-ray radiator mounted on a radiator carrier, with an x-ray film cassette loading and positioning device arranged relative to the radiator carrier so that an x-ray film cassette can be loaded into the device at a position remote from the x-ray radiator, and can be conveyed by the device, after loading, to an exposure position disposed beneath the x-ray radiator.

Abstract: An x-ray diagnostics installation for producing x-ray images has an x-ray image intensifier and a detector for measuring the average image brightness in a dominant region of the output screen of the x-ray image intensifier, and a gating unit with which the size and position of the dominant region can be varied. The gating unit is in the form of a tape roll of opaque material having a number of differently sized and shaped openings therein, corresponding to different desired measuring fields. A large number of differing dominant regions can thereby be selected by means of a unit which occupies a small space.

Abstract: A light distributor for directing the light of the output image of an x-ray image intensifier to a number of different types of cameras in an x-ray diagnostics installation has a housing to which the cameras are attached with their respective beam path axes disposed perpendicularly relative to each other and perpendicularly relative to the axis of the beam path from the x-ray image intensifier. A first mirror deflects the beam from the x-ray image intensifier to one of the cameras, and a second moveable mirror is introducible into the beam path between the first mirror and the first camera to deflect the beam from the x-ray image intensifier onto a second camera.

Abstract: A light distributor for use in an X-ray diagnostics installation wherein a light image corresponding to an X-ray image is generated by an X-ray image intensifier, and the light image is to be recorded using a number of different image recorders as a housing with input optics facing toward the X-ray image intensifier for generating a parallel light beam path, and has at least two movable mirror surfaces secured flat on a carriage. The carriage and mirror surfaces are arangement obliquely in a plane which is parallel to the beam path, and the carriage is displaceable along guides within this plane so that one of the mirror surfaces can be laterally moved into the beam path to deflect the light from the image intensifier onto a desired image recorder. At least one of the mirror surfaces is partially reflecting.

Abstract: A switch mechanism for an image intensifier hood in an x-ray diagnostics system is connected to a motor for moving the x-ray image intensifier toward and away from an examination subject. If the hood inadvertently comes into contact with the examination subject or a technician, the hood is displaced thereby actuating the switch mechanism and disengaging the motor to stop movement of the x-ray image intensifier, thereby avoiding injury to the examination subject and technician and avoiding damage to the x-ray image intensifier. The switch mechanism is constructed such that actuation thereof occurs upon the presence of forces acting on the hood in the direction of the luminescent screen surface or a direction perpendicular thereto, and each intermediate direction.

Abstract: In a device that photographs a television screen a plurality of lenses are adjacently arranged on exchangeable lens supports. In order to achieve a higher image frequency and in order to avoid operating errors during the positioning of the lenses, the disclosure provides that the lens supports carrying the lenses are positioned in the image recording apparatus in a waiting position, and are selectively shifted by means of individual drives into the active position; a television monitor is moved into the correct distance relative to the selected lens support via an additional positioning drive.

Abstract: The supply magazine and the collector magazine are arranged on opposite sides of the camera exposure station, with a transport conveying one film sheet in each instance via a removal slot of the supply magazine. The transport is coupled with a slide which is movable parallel to the film plane between the supply magazine and the camera exposure station. There is coupled to the slide a tang which conveys the film sheet disposed in the exposure station into the collector magazine. The illustrated sheet film camera is adapted to use in medical examination apparatus, and particularly for rapid sequence recording of images displayed on a fluorescent screen.

Abstract: An arrangement for respectively withdrawing a single film sheet from a stack of directly loosely superimposed film sheets, particularly for use in X-ray filming apparatus, including a magazine for the film sheets, pressure plate for pressing the stack of film sheets against the floor of the magazine, a withdrawal slot in a side wall of the magazine calibrated in the plane of the extreme film sheet introduced which is located on the floor of the magazine. The arrangement includes a step roll and conveyor rolls for the conveyance of the particular extreme film sheet positioned on the floor of the magazine through the withdrawal slot. The floor of the magazine concurrently forms the boundary edge of the calibrated withdrawal slot, while in the region of the edge of the extreme film sheet located on the floor which is remote from the withdrawal slot, the floor of the magazine has inserted a step roll having its axis extending in parallel to this edge.