US1696590A - Signaling system - Google Patents
Signaling system Download PDFInfo
- 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
Links
Images
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)
Priority Applications (15)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL24644D NL24644C (xx) | 1924-11-25 | ||
BE359027D BE359027A (xx) | 1924-11-25 | ||
BE331740D BE331740A (xx) | 1924-11-25 | ||
BE355192D BE355192A (xx) | 1924-11-25 | ||
NL18958D NL18958C (xx) | 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 (xx) |
BE (2) | BE355192A (xx) |
DE (2) | DE500530C (xx) |
FR (1) | FR606311A (xx) |
GB (2) | GB243683A (xx) |
NL (2) | NL24644C (xx) |
Families Citing this family (1)
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 |
-
0
- NL NL18958D patent/NL18958C/xx active
- BE BE331740D patent/BE331740A/xx unknown
- BE BE355192D patent/BE355192A/xx unknown
- NL NL24644D patent/NL24644C/xx active
-
1925
- 1925-09-04 FR FR606311D patent/FR606311A/fr not_active Expired
- 1925-09-29 DE DEI26703D patent/DE500530C/de not_active Expired
- 1925-10-06 GB GB24878/25A patent/GB243683A/en not_active Expired
-
1927
- 1927-10-21 US US227821A patent/US1696590A/en not_active Expired - Lifetime
-
1928
- 1928-10-21 DE DEI35835D patent/DE500305C/de not_active Expired
- 1928-10-22 GB GB30503/28A patent/GB299316A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB243683A (en) | 1926-07-22 |
BE355192A (xx) | |
NL18958C (xx) | |
DE500305C (de) | 1930-06-20 |
DE500530C (de) | 1930-06-21 |
NL24644C (xx) | |
BE331740A (xx) | |
GB299316A (en) | 1929-06-27 |
FR606311A (fr) | 1926-06-11 |
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