Abstract: An automatic detection system for control of oil spillage into sea waters comprising a plurality of optical fiber cables connected each to a control box and to a plurality of sensors located remotedly in the open sea, and each of the sensors is a part of a closed loop of a light signal, transmitted from the control box and received back by it. Each of the sensors consists of a floating buoy affixed to a permanent location in the open sea, having its center of gravity adjustable and stabilized, so that when it floats, the central part of the sensor rests at sea level. The buoy is provided with a central bore, into which the optical fiber cable's ending is positioned; and a plurality of concentric channels are provided from all sides of the bore, leading sea water from the outer surface of the buoy inwards.

Abstract: The present invention relates to a wallpaper which comprises an optical fibre which together with an outside control and/or alarm unit forms a closed optical circuit. The wallpaper is a sheet made from a suitable material, e.g. paper, plastic material and textile fabrics. This material may have the adhesive layer on itself. Alternatively, the adhesive is applied before lamination. The invention relates also to a process for the manufacture of the wallpaper.