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Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
servomechanism components namely, servovalves which produce a fluid output in response to a command signal, servoactuators which produce a fluid powered displacement in response to a command signal, hot gas control valves which control the flow of products of combustion in response to a command signal, [ servoinjectors which control in response to a command signal the flow of fluid injected into a rocket engine for thrust vector control, ] servocontrollers which provide electrical control for electrohydraulic actuation devices, [ numerical control positioners of the pneumatice-hydraulic type for association with a machine tool for positioning a workpiece relative to a cutting tool in response to manually set or punched tape controlled commands, servodrives which fluid drives a rotary output shaft in response to a command signal, ] and propellant control valves which control in response to a command signal the flow of fluid propellants used in rocket engines