Radio: Beam and Broadcast: Its Story and PatentsE. Benn limited, 1925 - 192 pages Batcheller Collection. |
Other editions - View all
Common terms and phrases
aerial alternating current amplifier anode antenna apparatus audion battery beam British Patent broadcasting capacity areas cathode coherer condenser conductor connected coupling described and ascertained device Diode direct current discharge distance earth effect electric arc electric currents electric waves electrical oscillations electrodes Elihu Thomson employed energy filament Fleming grid circuit Guglielmo Marconi H. J. Round Hertzian wave high frequency improvement impulses induction coil invention relates LEE DE FOREST London low frequency magnetic manner Marconi Company Marconi's Wireless Telegraph means mentioned in Claim metal obtained oscillation circuit oscillation detector parabolic reflector particularly described Patent Office Poulsen Arc present invention produced Professor radiator radio radio-telegraphy receiving instrument reference relay resonance secondary self-inductance coil self-induction sensitive tube short waves source of direct spark gap strengthened substantially as described suitable syntonized telegraphy and telephony telephone terminals tion transformer transmitting triode tuned varying or alternating vibrations wing circuit wire Wireless Telegraph Company wireless telegraphy
Popular passages
Page 144 - C." (TITLE OF INVENTION.) [Name and address] by profession do hereby declare the nature of this invention and in what manner the same is to be performed to be particularly described and ascertained in and by the following statement [Here insert full description of invention].
Page 131 - Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is (d).
Page 104 - What I claim, and desire to secure by letters patent of the United States, is — The...
Page 23 - ... life are well within the possibilities of discovery, and are so reasonable and so clearly in the path of researches which are now being actively prosecuted in every capital of Europe that we may any day expect to hear that they have emerged from the realms of speculation into those of sober fact. Even now, indeed, telegraphing without wires is possible within a restricted radius of a few hundred yards, and some years ago I assisted at experiments where messages were transmitted from one part...
Page 22 - ... and to keep up a succession of such waves radiating into space in all directions. It is possible, too, with some of these rays, if not with all, to refract them through...
Page 22 - Here is unfolded to us a new and astonishing world — one which it is hard to conceive should contain no possibilities of transmitting and receiving intelligence. Rays of light will not pierce through a wall, nor, as we know only too well, through a London fog. But the electrical vibrations of a yard or more in wave-length of which I have spoken will easily pierce such mediums, which to them will be transparent. Here, then, is revealed the bewildering possibility of telegraphy without wires, posts,...
Page 188 - Commendatore Guglielmo Marconi, and the Postmaster-General, with regard to the Establishment of a Chain of Imperial Wireless Stations; together with a Copy of the Treasury Minute thereon, and other Papers.
Page 142 - ... particularly described and ascertained the nature of the said invention, and in what manner the same is to be performed...
Page 47 - ... 2. Means for producing sustained electrical oscillations comprising an oscillatory circuit having two electrodes, a second circuit coupled thereto having a conducting body interposed between said electrodes, and means for varying the frequency of the produced oscillations.
Page 136 - In operation the signalling-key 6 is pressed, and this closes the primary of the induction-coil. Current then rushes through the transformer-circuit and the condenser e is charged and subsequently discharges through the spark-gap. If the capacity, the inductance, and the resistance of the circuit are of suitable values, the discharge is oscillatory, with the result that alternating currents of high frequency pass through the primary of the transformer and induce similar oscillations in the secondary...