Abstract: A circuit arrangement including a contact switch, a motion dependent switching means and motion detection means, said contact switch being alternatively movable between a first switching position and a second switching position corresponding to the alternative first and second making (or breaking) positions, said motion detection means include means to generate an actuation signal when said motion dependent switching means moves between said first and said second switching positions according to a first predetermined sequence and within a first predetermined time.

Abstract: Optical means including an optical source, selection means and optical guiding means, the optical source includes means for producing a plurality of optical regions of different colours, the optical guiding means include a plurality of elongated optical guides for guiding light coupled to the upstream ends of the optical guides to their downstream ends, the selection means includes means for selectively aligning the upstream ends of the optical guides to one or a plurality of the optical regions.

Abstract: Optical means including an optical source, selection means and optical guiding means, the optical source includes means for producing a plurality of optical regions of different colours, the optical guiding means include a plurality of elongated optical guides for guiding light coupled to the upstream ends of the optical guides to their downstream ends, the selection means includes means for selectively aligning the upstream ends of the optical guides to one or a plurality of the optical regions.