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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.
electric switching elements for use in connection with automatic bus, train, sliding, vertical and folding doors and gates for detecting persons, animals, and objects using light without the need for physical contact, namely, electric safety edges, safety contact mats, movement indicators, light scanners, and photoelectric barriers and sensors; switching units composed primarily of automatic switching apparatus for signal and contact transmission for use in connection with automatic bus, train, sliding, vertical and folding doors and gates; apparatus for signal transmission in the nature of transmitters of electronic signals, cables for optical and electrical signal transmission for use in connection with automatic bus, train, sliding, vertical and folding doors and gates; electrical safety edge systems composed primarily of electric safety edges for use in connection with automatic bus, train, sliding, vertical and folding doors and gates; detection devices for automatic bus, train, sliding, vertical and sliding doors and gates, namely, electric pressure wave switches