Abstract: The disclosed surgical table hydraulic system uses a plurality of double acting hydraulic motors, such as double-ended hydraulic cylinders or reversible rotary hydraulic motors, that can be operated either independently or in synchronization. Each of the motors can be connected to a source of pressurized hydraulic fluid, and to a reservoir, for independent action. At least some of the motors can also be connected in a hydraulic series between the hydraulic fluid supply and the reservoir for synchronous operation. In this way, separate elements of the table, controlled by the individual hydraulic motors, can be moved in unison. Also, by operating two motors that control different types of motion, such as elevation of a table and tilting about a horizontal axis, compound motions of one or more sections of the table can be provided.

Abstract: An automatic x-ray film loader is provided with film transports for moving the film to or from an exposure station that automatically correct improperly aligned sheets of film. The speed of at least one of the transports is automatically adjusted so that sheets are transferred from one transport to another smoothly and evenly. A simplified system for clamping the sheets of film between two intensifier plates and for moving one of these plates so that sheets of film can be fed to or moved away from the plates is also provided.