Electronic and electromechanical apparatus and instruments including sensing and control devices for the operation of electromechanical taps, faucets and stopcocks; scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; automatic vending machines and mechanisms for coin operated apparatus; cash registers, calculating machines and data processing equipment; fire-extinguishing apparatus; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs