9 [ Measuring, signaling, checking, life-saving and teaching devices, namely, distance measuring apparatus, emergency signal transmitters; instrument for conducting, switching, transforming, accumulating, regulating and controlling electricity, namely, adapters, electrical transformers, electrical switches; devices for recording, transmission of sounds or images; blank magnetic data carriers; recording discs, namely, blank magnetic disks, blank recordable optical discs; automatic vending machines and mechanism for coin-operated devices; cash registers, calculating machines, data processing equipment and computers; fire extinguishers; ] instruments, devices and components for photoelectric, electric and electronic control systems and adjustors particularly for operating doors and gates, namely, photoelectric sensor, electric door openers and closers; [ operating control devices and indicators, namely, electrical controlling devices and electric indicator panels; control and switching element, namely, level switches and level indicators for monitoring and controlling liquids in tanks and vessels, electrical switches; indicator lights; lift shaft installations, namely, electric and electronic video surveillance installations for lift shafts, alarm installations for lift shafts; instruments, devices and components for electronic control systems for machines, namely, electrical controllers, electronic integrated circuits, electronic card readers, electronic key cards, electric actuators; devices and instrument for power supply, namely, power supply connectors and adaptors for use with portable electronic devices; emergency power units for supplying electrical power to heat and power generators, namely, battery packs, battery packs especially designed for interlock control systems for electronic door opening and closing systems; ] electrically and mechanically operated control instruments and controllers and structural parts, namely, automatic controllers for revolving doors, brake controllers, electrical controllers; electronic door and gate locks; electronic door opening and closing system; [ devices and instruments for fire protection in particular for guarding and for building, namely, smoke detectors, temperature detectors, optical and acoustical fire alarm devices; alarm sirens; electronic control circuit for use in door and gate drive units; ] adhesive electromagnets for doors [ ; instruments, devices and control devices for hoisting elevator hardware and door contact, namely, electrical controllers, electric motor switches for switching ]