TY - PAT CY - Patent A1 - Ischganeit, Ronny A1 - Tilkorn, Michael A1 - Neerhut, Frank A1 - Jung, Norbert A1 - Reinert, Dietmar A1 - Steiner, Holger A1 - Schwaneberg, Oliver T1 - Sicherheitsvorrichtung für Fahrtreppen oder Fahrsteige sowie Fahrtreppe oder Fahrsteig T6 - Safety device for escalators or moving walkways and escalator or walkway / Dispositif de sécurité pour escaliers roulants ou trottoirs roulants et escalier roulant ou trottoir roulant N2 - The device (10) has a handrail (18) provided with an optical contactless monitoring device formed as an active sensor system, where the monitoring device is arranged in a region of a guide (14) of the handrail at a front base (16) of an escalator (12) or a moving pavement. The monitoring device has two transmission paths (28, 30) with wavelength bands that are different from each other, where one of the paths includes the handrail. Ratio or difference between signals of the paths is used for recognizing foreign bodies e.g. hands of adults and children. UR - https://register.epo.org/application?number=EP11172318 ER -