US1696590A - Signaling system - Google Patents

Signaling system Download PDF

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Publication number
US1696590A
US1696590A US227821A US22782127A US1696590A US 1696590 A US1696590 A US 1696590A US 227821 A US227821 A US 227821A US 22782127 A US22782127 A US 22782127A US 1696590 A US1696590 A US 1696590A
Authority
US
United States
Prior art keywords
potential
oscillator
grid
anode
currents
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
US227821A
Other languages
English (en)
Inventor
Lester F Bird
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.)
General Electric Co
Original Assignee
General Electric Co
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
Publication date
Priority to NL24644D priority Critical patent/NL24644C/xx
Priority to BE331740D priority patent/BE331740A/xx
Priority to NL18958D priority patent/NL18958C/xx
Priority to BE359027D priority patent/BE359027A/fr
Priority to BE355192D priority patent/BE355192A/xx
Priority claimed from US752243A external-priority patent/US1696566A/en
Priority to FR606311D priority patent/FR606311A/fr
Priority to DEI26703D priority patent/DE500530C/de
Priority to GB24878/25A priority patent/GB243683A/en
Priority to FR31534D priority patent/FR31534E/fr
Application filed by General Electric Co filed Critical General Electric Co
Priority to US227821A priority patent/US1696590A/en
Priority to FR35156D priority patent/FR35156E/fr
Priority to FR36052D priority patent/FR36052E/fr
Priority to DEI35835D priority patent/DE500305C/de
Priority to GB30503/28A priority patent/GB299316A/en
Publication of US1696590A publication Critical patent/US1696590A/en
Application granted granted Critical
Priority to FR36652D priority patent/FR36652E/fr
Anticipated expiration legal-status Critical
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
    • 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
    • H04B1/44—Transmit/receive switching
    • H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Definitions

  • My invention relates to signaling systems employing oscillation generators and more particularly to signaling systems adapted for duplex operation.
  • the purpose of my present invention is to provide means for controlling the production of oscillations in response to signal currents in which modulation through the control device, during the firstsyllable of each word, will be substantially eliminated.
  • smoothing means such as condensers
  • condensers have been employedin the anode circuit of the control device upon the grid of which the signal currents are directly impressed. It has been found that. during the time when no signal current is impressed upon the grid of the con trol device the sn'ioothing condenser will as sums a. certain charge. This charge will dissipate itself through the control device upon the initiation of control currents upon the grid thereof.
  • 1 represents an oscillation generator of the three clement electron discharge type which is provided with the usual oscillatory circuit 2.
  • This generator is adapted to supply high frequency currents through the coupling condenser 3 to the grid of a high frequency amplifier at from which they are supplied through the output transformer 5 and coupling condensers 6 to a radiating system or wire lino conductors 7.
  • the anode circuit of the electron discharge device 1 extends through a radio frequency choke coil 8. source of potential 9, space between the oath ode and anode of the control device 10, conductor 11 and space between the cathode and anode of the oscillation generator 1.
  • the oscillation generator will be inoperative except at times when the grid of the control device is at such a potential that current may flow in the anode circuit of the oscillation generator.
  • the anode circuit of the amplifier 4.- extends through the primary winding of the trans former 5, niodudation reactor 18, source of potential l l, conductor 15 and space between the cathode and anode of the electron discharge device 4t. 16 represents the operators station from which signal currents may be supplied through the hybrid coil 17 and transformer 18 from which they may be impressed upon the grid of an electron discharge device 19 by means of which they are caused to modulate the high 'irequenc currents produced by the oscillator 1 in a manner well-known in the art.
  • This potential will be of opposite polarity from that of the source 2-3 and will be suf icient to cause the g 'd o1 the device 10 to be varied in a positire direction su'fiiciently to permit the flow ot anode current in this device, and thereby to cause the production of oscillations by the oscillation generator 1.
  • 25 represents a condenser which is connected in parallel with the resistance 2% for the purpose of smoothing out the signal wave, and thereby causing a' substantially smooth potential to appear upon the grid of the device 10.
  • the condenser 25 will be of such capacity that it will become fully charged during the first tour or five cycles of the voice wave and will discharge through the resistance at the end of each word.
  • 526 represents a condenser which is connected between the cathode and anode of the control device in the usual manner for smoothing purposes.
  • each oi the electron discharge devices are represented. as energized by means of? alternating currents through suitable cathode transformers only the secondary windings 27 of which are shown.
  • the receiving apparatus which is commonly associated with systems of this nature is represented at 28 and is connected between suitable terminals of the hybrid coils 5 and 17.
  • an electron di.s charge oscillator an electron discharge device connected in the anode-cathode circuit of said oscillator and having impedance sufficiently high normally to prevent the production of oscillations by said oscillator, a source of signal current, means for rectifying said signal current and means for supplying a potential resulting from rectification of said signaling currents to said discharge device to reduce the in'ipedance thereof and thereby to control the operation of said oscillator.
  • an electron discharge osoillator a second electron discharge device connected in the anode-cathode circuit of said oscillator and having impedance suiiiciently high norn'ially to preclude the production of oscillations by said oscillator, a source of signal current, means for rectifying said signal current and means for supplying a substantially smooth potential resultingfrom rectification of said signal currents to said second discharge device to reduce the impedance thereof and thereby to cause said oscillator to produce oscillations.
  • an electron discharge oscillator havin an anode, a cathode and a control element, said anode and cathode bcii'ig connected in the anode circuit of said oscillator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Amplifiers (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US227821A 1924-11-25 1927-10-21 Signaling system Expired - Lifetime US1696590A (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
NL24644D NL24644C (un) 1924-11-25
BE331740D BE331740A (un) 1924-11-25
NL18958D NL18958C (un) 1924-11-25
BE359027D BE359027A (un) 1924-11-25
BE355192D BE355192A (un) 1924-11-25
FR606311D FR606311A (fr) 1924-11-25 1925-09-04 Perfectionnements aux systèmes de signalisation
DEI26703D DE500530C (de) 1924-11-25 1925-09-29 Hochfrequenzduplexsystem
GB24878/25A GB243683A (en) 1924-11-25 1925-10-06 Improvements in high frequency signalling systems
FR31534D FR31534E (fr) 1924-11-25 1926-01-23 Perfectionnements aux systèmes de signalisation
US227821A US1696590A (en) 1924-11-25 1927-10-21 Signaling system
FR35156D FR35156E (fr) 1924-11-25 1928-01-13 Perfectionnements aux systèmes de signalisation
FR36052D FR36052E (fr) 1924-11-25 1928-10-19 Perfectionnements apportés à la signalisation
DEI35835D DE500305C (de) 1924-11-25 1928-10-21 Einrichtung zur drahtlosen Duplexnachrichtenuebermittlung
GB30503/28A GB299316A (en) 1924-11-25 1928-10-22 Improvements in high frequency electric signalling systems
FR36652D FR36652E (fr) 1924-11-25 1929-03-15 Perfectionnements aux systèmes de signalisation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US752243A US1696566A (en) 1924-11-25 1924-11-25 High-frequency duplex signaling system
US227821A US1696590A (en) 1924-11-25 1927-10-21 Signaling system

Publications (1)

Publication Number Publication Date
US1696590A true US1696590A (en) 1928-12-25

Family

ID=26921788

Family Applications (1)

Application Number Title Priority Date Filing Date
US227821A Expired - Lifetime US1696590A (en) 1924-11-25 1927-10-21 Signaling system

Country Status (6)

Country Link
US (1) US1696590A (un)
BE (2) BE355192A (un)
DE (2) DE500530C (un)
FR (1) FR606311A (un)
GB (2) GB243683A (un)
NL (2) NL24644C (un)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE755785C (de) * 1933-03-16 1952-03-31 Marconi Wireless Telegraph Co Anordnung zur automatischen Einschaltung eines Senders mit Hilfe von gleichgerichteten Modulationsschwingungen

Also Published As

Publication number Publication date
BE355192A (un)
GB299316A (en) 1929-06-27
FR606311A (fr) 1926-06-11
NL24644C (un)
GB243683A (en) 1926-07-22
DE500530C (de) 1930-06-21
DE500305C (de) 1930-06-20
NL18958C (un)
BE331740A (un)

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