US1674784A - Wireless telegraphy and telephony - Google Patents

Wireless telegraphy and telephony Download PDF

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Publication number
US1674784A
US1674784A US604999A US60499922A US1674784A US 1674784 A US1674784 A US 1674784A US 604999 A US604999 A US 604999A US 60499922 A US60499922 A US 60499922A US 1674784 A US1674784 A US 1674784A
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US
United States
Prior art keywords
tube
grid
circuit
thermionic
oscillation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US604999A
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English (en)
Inventor
Lock Michael
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DRAHTLOSE TELEGRAPHIE MBH
Gesellschaft fur Drahtlose Telegraphie Mbh Hallesches
Original Assignee
DRAHTLOSE TELEGRAPHIE MBH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by DRAHTLOSE TELEGRAPHIE MBH filed Critical DRAHTLOSE TELEGRAPHIE MBH
Application granted granted Critical
Publication of US1674784A publication Critical patent/US1674784A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/56—Circuits using the same frequency for two directions of communication with provision for simultaneous communication in two directions

Definitions

  • MICHAEL LOOK OF BERLIN, GERMANY, ASSIGNOR T GESELLBCKAIT m DRAHTLOSE TELEGRAPHIE I. B. H. HALLESCHES, OF BERLIN, GERMANY, A CORPORATION OF GERMANY.
  • An object of the invention to be hereinafter set forth is to make possible conversation in opposite directions by means of a single wave length.
  • a tube arran ement is used which serves for both sen ing and receiving and which, through the agencyof special means, is alternately operated exclusively as a sender or as a receiver.- This alternation in the operation of the tube arrangement as a sender and as a receiver occurs so quickly that it is not audible and will not alter the character of speech in telephony.
  • FIG. 1 is a diagrammatic representation of a circuit arrangement embodying the invention.
  • Fig. 2 is a graphic illustration of the changes in. potential impressed upon the second grid of the main vacuum tube.
  • 1 is an antenna circuit
  • 2 is a coil which together with condenser 3 constitutes an oscillating' circuit.
  • this circuit is energized by undamped oscillations generated by the tube 4.
  • the conductor leading to the controlling grid 5 includes a. telephone transmitter 6 and the anode circuit includes a receiver 7.
  • the tube may, for instance, have two grids and its second space charging grid 8 may be connected with an ohmic resistance 9 provided in the anode circuit of a cathode tube 10.
  • the grid 11 of cathode tube 10 has an alternating potential impressed on it by the small aux1liary oscillator 12. The frequency of this potential will determine the timing of the alternation in the operation of the tube 4 as a sending and as a receiving tube.
  • tube 0 crates as a sender. This makes possible t e alternate operation of the arrangement as a sender and as a receiver.
  • a thermionic tube having at least three electrodes, means for causing the tube to produce oscillations to enable it to be operated as an oscillator, and for intermittently decreasing the current in the anode circuit of the tube to cause it to cease to function as an oscillator and to function'as a detector, said means operating at an inaudible frequency.
  • a thermionlc tube having a cathode, anode, and grid, the anode circuit and grid circuit being regeneratively coupled, a
  • a thermionic tube having at least t ree electrodes, the grid and plate circuits being regeneratively coupled, telephone receiving means in said plate circuit, telephone transmitting means in said grid circuit, and means for intermittently decreasing the plate current of the tube so as to prevent functioning of the tube as transmitter and to cause it to function as a detector, said last mentioned means operating at an inaudible frequency.
  • a vacuum tube In a signalling system using radio frequency, a vacuum tube. means whereby thevacuum tube may function as a generator of oscillations or as a detector. and additional means for alternately and automatically causing said vacuum tube to function as a generator and as a detector.
  • a vacuum tube means whereby the vacuum tube may function as a generator of oscillations or as a detector of oscillations,
  • a thermionic tube means whereby said tube may function as an oscillator for sending or as a detector for receiving, and additional means for alternately causing said tube to function as an oscillator and as a detector, the frequency of the alternations being above audibility.
  • a thermionic tube having a cathode, anode and grid, means for alternately causing the tube to produce oscillations for sending and causing the tube not to oscillate for receiving, said means operating at an inaudible frequency, and comprising a fourth electrode in the tube, a thermionic tube amplifier connected to the fourth electrode, and a master oscillator feeding said amplifier.
  • a thermionic tube having a cathode, anode and grid, means for causing said tube to produce oscillations, and means for intermittently decreasing the anode current of the tube to cause it to cease to function as an oscillator and simultaneously to cause it to function as a detector, said means operating at inaudible frequency and comprising a thermionic tube amplifier having an ohmic resistance in its anode circuit, a fourth electrode in the first-mentioned tube connected to the anode circuit of the amplifier between said resistance and the anode of the amplifier, and a master oscillator coupled to the grid-filament circuit of the amplifier for causing it to impress changing potentials on said fourth electrode.
  • a thermionic tube having a cathode, anode, and grid, the anode circuit and grid circuit being regeneratively coupled,.
  • a fourth electrode in said tube means for impressing a changing potential on said fourth elect-rode so as to alternately cause said tube to function as an oscillator and as a detector.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Mobile Radio Communication Systems (AREA)
US604999A 1921-12-20 1922-12-05 Wireless telegraphy and telephony Expired - Lifetime US1674784A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE190699T 1921-12-20

Publications (1)

Publication Number Publication Date
US1674784A true US1674784A (en) 1928-06-26

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ID=31892926

Family Applications (1)

Application Number Title Priority Date Filing Date
US604999A Expired - Lifetime US1674784A (en) 1921-12-20 1922-12-05 Wireless telegraphy and telephony

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US (1) US1674784A (enrdf_load_stackoverflow)
GB (1) GB190699A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426581A (en) * 1942-07-01 1947-09-02 Tungsol Lamp Works Inc Method of and apparatus for concurent radio transmission and reception

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426581A (en) * 1942-07-01 1947-09-02 Tungsol Lamp Works Inc Method of and apparatus for concurent radio transmission and reception

Also Published As

Publication number Publication date
GB190699A (enrdf_load_stackoverflow) 1923-10-11

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