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    • 42. 发明专利
    • Improvements relating to advertising
    • GB168078A
    • 1921-06-23
    • GB542020
    • 1920-02-23
    • JOHN CLIFFORD SAVAGE
    • G09F21/16
    • 168,078. Savage, J. C. Feb. 23, 1920. Visible non-luminous signals.-Relates to the utilization of aircraft for advertising and amusement and for scientific demonstration and like purposes by the formation of a visible trail of smoke, &c. The smoke &c. is formed by the admixture of different materials contained in two or more receptacles 2, 10. The receptacle 2 is fitted with valves 3, 3*, one of which is controlled by the pilot. The material in the receptacle 2, when released, enters a passage 6 along which it is blown by an air stream collected by a shoot 7, and emerges into space at the rear end of the passage 6. The substance in the receptacle 10 is admitted by a tap 11 into exhaust pipes 9 which terminate near the nozzle of the passage 6. The substances in the receptacles 2, 10 may be solid, liquid or gaseous, the essential requirement being that they produce a visible smoke effect by mixing or chemically reacting with one another. Oil contained in the receptacle 10 vaporized by the exhaust gases in the pipes 9 and mixed with powdered carbon from the receptacle 2 are described. By suitably arranging the nozzles an aircraft may be given the appearance of being in flames.