GB505094A - Method of and means for distributing fluid to prevent the accretion of ice on the wings and other exposed parts or surfaces of aircraft - Google Patents

Abstract

505,094. Means for preventing the formation of ice on aircraft surfaces. DUNLOP RUBBER CO., Ltd., WRIGHT, J., and TREVASKIS, H. Nov. 3, 1937, No. 30072. [Class 4] In means for distributing liquid to prevent ice-accretion on the wings and other exposed parts of aircraft, liquid is fed under pressure to a device or a number of devices incorporating a valve for regulating the amount of liquid flowing to a particular part, and means are provided by which the regulated flow may be byepassed and an unrestricted or flooding flow delivered to the part or simultaneously to a plurality of parts. As shown in Fig. 1, liquid stored in containers 1, la is fed under pressure, by means of air from an air bottle supplied to the container 1 through n control valve and pipe 3, to a flooding unit 6, provided with a gauge 7 indicating the pressure in the whole system, and a plurality of regulating devices 8, connected to pipes f<1> leading to the parts to be treated and provided with flow-registering gauges. A trap valve 5 is provided to prevent air entering the system if the liquid is exhausted. The regulators 8 and unit 6 are secured together by bolts 45 provided with conduits 46, sealed at both ends and communicating with passages in the regulators and unit by diametrical holes and circumferential recesses provided at intervals along the bolts. During normal working, liquid fed to the unit 6, Fig. 2, flows along the c,onduit in the lower bolt, the part 46a of which communicates with the gauge 7 through a passage 13, and enters a chamber 16 in each regulator, Figs: 4 and 5, through passages 14, 15 controlled by a manually adjustable needle valve 17, the liquid then flows from the base of the chamber 16 and through a hole in a spring-pressed plunger 20, connected to a flexible diaphragm 22 and the " movement " 18 of the registering gauge, to a union 29 connected to one of the pipes f<1>. To flood the various parts simultaneously, a lever 35, Fig. 2, is depressed to raise a plunger 34 against the action of a torsion spring 39 and lift a spring- pressed ball 31. Liquid can then flow through the passage 13, a chamber 30 and passages 41, 42 to the part 46b of the conduit in the upper bolt and enter the chamber 16, Fig. 5, through a passage 43 controlled by a spring-loaded valve 44. According to the Provisional Specification the liquid may be fed to the unit 6 by a hand pump supplying a pressure accumulator.