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1. 发明专利

GB151115A Improvements in wireless transmitting and receiving apparatus for use on aircraft 未知
公开(公告)号：GB151115A
公开(公告)日：1920-09-23
申请号：GB1647819
申请日：1919-07-02
申请人： LESLIE ALFRED MCDOUGALD , JOHN MICHAEL POYNTZ
IPC分类号： H01Q1/28
摘要： 151,115. McDougald, L. A., and Poyntz, J. M. July 2, 1919. Wireless aeronautic signals; aerials.-An openended aerial consists of a wire or wires supported on or immediately above or below, or inside, the planes, fuselage, or other part of an aircraft. One terminal of the transmitting or receiving apparatus 7 is connected to a wire 1 which extends symmetrically to the upper and lower planes on each side, while the other terminal is connected to wires 4 on each side of the fuselage. The ends of the aerial wires are insulated by ebonite caps fitting over the rubber insulation.

2. 发明专利

GB165994A Improvements in or connected with wireless telephony and telegraphy 未知
公开(公告)号：GB165994A
公开(公告)日：1921-07-14
申请号：GB1166720
申请日：1920-04-27
申请人： HORACE LESLIE CROWTHER , LESLIE ALFRED MCDOUGALD , HAROLD MORRIS AIREY , GEORGE ALEXANDER IRVING
IPC分类号： H03C1/16
摘要： 165,994. Crowther, H. L., and Mc- Dougald, L. A.. Airey, H. Morris-, and Irving, G. A. April 27, 1920. Modulating systems and apparatus.-In a transmission system, the power valve is (a) continuously excited by a separate high-frequency source, and (b) the potential of the grid of the power valve is varied at audible frequency by means of a microphone for telephony, or by a low-frequency oscillating valve or other source for telegraphy. As shown in Fig. 1, the plate of the power valve 6 is fed from a high-tension supply 8, whilst the grid is coupled at 11 to a separate oscillating- valve circuit 10. The audible signal frequency is superposed on the grid circuit by a microphone 12 which is coupled at 13 to the grid-filament circuit of valve 14, the anode-filament circuit of which constitutes the grid leak-resistance of the power valve 6. In alternative forms, the audible signal frequency is superposed on the grid of the power valve either by inserting the microphone transformer directly in the grid circuit of the power valve, or by placing the microphone transformer in the grid circuit of an auxiliary valve, such as 14, Fig. 1, and coupling the plate circuit of this valve directly to the grid circuit of the power valve.

3. 发明专利

GB158011A Improvements in thermionic valves 未知
公开(公告)号：GB158011A
公开(公告)日：1921-02-03
申请号：GB1863419
申请日：1919-07-28
申请人： LESLIE ALFRED MCDOUGALD
IPC分类号： H01J19/36 , H01J19/42
摘要： 158,011. McDougald, L. A. July 28, 1919. Vacuum tubes.-In a valve for use as a continuous-wave generator for wireless signalling, the anode, or a plate to which the anode is attached, forms part of the wall of a glass bulb, and of a glass reservoir containing cooling liquid, the anode or plate and the reservoir being connected by fusion with the bulb. As shown in Fig. 1, a. bell-shaped anode A, of nickel or other metal or alloy, has welded to it a dished or corrugated ring D of platinum, sealed into a cylinder C, which forms part of a reservoir B fused to the bulb E. A removable stopper B , fitted into the reservoir, has pipes for the circulation of liquid, or a bent tube F.acting as a vent. In a modification, Fig. 2, the anode A is secured to a platinum disc D , sealed into the cylinder C, and having a mass of copper H extending into the liquid. In a further modification, a platinum anode of disc shape has a mass of copper secured thereto. According to the Provisional Specification, the projections on the anode may be in the form of rods or tubes.

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