Improvements relating to floating coastal defence and like units

摘要

558,484. Floating structures. PHILLIPS, W. A. Aug. 23, 1940, No. 13405. [Classes 113 (i) and 113 (ii)] A floating residence, coastal defence unit, lightship, or like floating structure, is of relatively great draft and its vertical section is of stepped form including an upper part 1 of relatively large area in plan lying at the water level 28, a flat or inclined shoulder portion 3 just below the water level, and one or more lower parts 2 of downwardly decreasing crosssectional area. The upper and/or lower parts may be circular, elliptical, or polygonal in horizontal cross-section, the upper part may have a horizontal cross-section which is substantially constant throughout its depth, the lower part may be of truncated conical formation, and the bottom 20 may be domed. The structure may be provided with a circular keel 29, and with stiffening webs 22 - - 25, and it is preferably made of reinforced concrete which may be covered with resilient and waterproof material. Specification 558,455 is referred to.