9
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.
apparatus for the staging of audio visual displays, including electricallyoperated apparatus for the cuing of speakers and actors by means of scripts advanced in conformity with the action and/or dialogue or monologue to be presented, and electrical driving, switching and speed control equipment therefor, projectors, slide selectors, card readers, sequence selectors, lighting control apparatus, relay control panels, and electrical circuit control apparatus