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    Improvements in apparatus for modulating or demodulating an electrical carrier of frequency, high compared with that of the signals modulating it, and more particularly of radio frequency
    42.
    发明专利
    Improvements in apparatus for modulating or demodulating an electrical carrier of frequency, high compared with that of the signals modulating it, and more particularly of radio frequency 未知

    公开(公告)号：GB450704A

    公开(公告)日：1936-07-23

    申请号：GB716035

    申请日：1935-03-07

    Applicant: GEN ELECTRIC CO LTD ,  LESLIE IVAN FARREN ,  STEWART JOHN

    IPC: H03C1/52

    Abstract: 450,704. Valve modulating and demodulating circuits. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and FARREN, L. I., and STEWART, J., c/o General Electric Co., Ltd., Wembley, Middlesex. March 7, 1935, No. 7160. [Class 40 (v)] A modulator or demodulator comprises two pairs of valves with the input voltages applied in push-pull between corresponding grids in the valve pair, a 90‹ phase displacement being produced between the voltages fed to one pair of valves relatively to the other pair of valves. The valves are preferably bi-linear and may be of the hexode type. The Figure shows an arrangement in which a common load resistance 3 is used and in which both the input frequencies and one of the sidebands are removed. In this arrangement networks 13, 14 are provided to produce the required displacement in phase and the outputs so combined that the required sideband is obtained. Lack of balance in the valves may be compensated by adjusting the centre tappings of the input transformers. U.S.A. Specification 1,977,536 is referred to.

    Improvements in and relating to Gas Producers.
    45.
    发明专利
    Improvements in and relating to Gas Producers. 未知

    公开(公告)号：GB113182A

    公开(公告)日：1918-02-14

    申请号：GB498217

    申请日：1917-04-10

    Applicant: STEWART JOHN

    Inventor： STEWART JOHN

    IPC: C10J3/34

    Abstract: 113,182. Stewart, J. April 10, 1917. Charges, agitating.-In connexion with the rotary conical base of a gas-producer, fixed watercooled stirrers 19 are provided, having arms extending over and under the pocket-shaped grates 14 The rotary base may also carry upwardlyprojecting stirrers as indicated by dotted lines at 25.

    Improvements in the Construction of Tank Vessels.
    47.
    发明专利
    Improvements in the Construction of Tank Vessels. 未知

    公开(公告)号：GB191516834A

    公开(公告)日：1916-11-23

    申请号：GB191516834D

    申请日：1915-11-30

    Applicant: ISHERWOOD JOSEPH WILLIAM ,  STEWART JOHN WILLIAM

    Inventor： ISHERWOOD JOSEPH WILLIAM ,  STEWART JOHN WILLIAM

    Abstract: 16,834. Isherwood, J. W., and Stewart, J. W. Nov. 30. Oil-carrying vessels; tanks.-A tank vessel for oil &c. is built with vertical cylindrical tanks a which project one into the other, in plan, as shown ; the encroaching spaces b may be formed as compartments between the tanks, or left open. Adjoining tanks may be attached to straight bulkheads f. The tanks are connected by short bulkheads d to the sides c of the vessel, and the interspaces e thus formed may be used for cargo. Freight vessels may be converted by fitting them with the above interior arrangement.

    Improvements in Speedometer Driving Connections for Motor Cycles.
    49.
    发明专利
    Improvements in Speedometer Driving Connections for Motor Cycles. 未知

    公开(公告)号：GB191419368A

    公开(公告)日：1915-06-10

    申请号：GB191419368D

    申请日：1914-09-02

    Applicant: STEWART JOHN KERWIN

    Inventor： STEWART JOHN KERWIN

    IPC: G01P1/04

    Abstract: 19,368. Stewart, J. K. Sept. 2, 1913, [Convention date]. Speed-indicator transmission mechanism for motor-cycles comprises a link 9 mounted on the nut 8 of the cycle axle 7, which is carried by the usual spring forks. Secured in the split end of the link is a bearing 10 carrying a countershaft 12 having at one end a driven pinion 13 and at the other end spiral gearing driving a shaft 16 mounted in a housing 15 pivoted to the bearing 10. The shaft 16 is contained in curved tube 19 connecting the bearing 15 and the speed-indicator casing. The various parts are proportioned so that arcs 24, 25 struck from the centres 3, 12 coincide as nearly as possible, any movement of the countershaft being allowed for by t h e flexibility of the tube. Adjustment on the handle-bar is facilitated by the provision of a ball-and-socket joint 30.

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