US1649132A - System of radio communication over wires - Google Patents
System of radio communication over wires Download PDFInfo
- Publication number
- US1649132A US1649132A US511835A US51183521A US1649132A US 1649132 A US1649132 A US 1649132A US 511835 A US511835 A US 511835A US 51183521 A US51183521 A US 51183521A US 1649132 A US1649132 A US 1649132A
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- US
- United States
- Prior art keywords
- station
- stations
- wires
- radio communication
- connections
- 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
- 238000004891 communication Methods 0.000 title description 6
- 230000011664 signaling Effects 0.000 description 7
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
Definitions
- GARE SCARZ OF CHABLOTTENBURG, NEAR BERLIN, GERMANY, ASSIGNOR 1'0 WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PESVANIA.
- This invention relates to radio signaling. 1t is particularly applicable to signaling over line wires where the line consists of three or more Wires.
- the invention is an improvement over the system shown in my application, Ser. No. 511,831, filed Oct. 31, 1921, Patent 1,622,679, March 29, 1927.
- llt isa further object of this invention to provide a means whereby the connections at the calling and the called stations may be rearranged so that communication between these stations can be carried on without inter- Terence from the other stations in the system and without interfering with said other stations.
- igure 1 is a diagrammatic showing in detail of the connections at one station, the connections in the other figures being shown in less detail.
- Fig. 2 is a diagrammatic showing of the connections at two stations.
- Fig. 3 is a similar showing of a different arrangement of such connections.
- Fi. d is a diagram showing connections for tree stations.
- Fig. 5 is a diagram illustrating the connection which results from changing the switches in Fig. 4.
- the connections shown in Fig. 1 have been described in considerable detail in the above identified application and they are, therefore, only briefly described here.
- the line wires 15, 16 and 17 have associated with them three antennae 1, 2 and 3.
- the inductors 4, 5 and 6 are connected to the several antennae and to the common point 14 which is connected to the ground.
- Condensers 7 8 and 9 in shunt to the several inductors, respectively, adord means tor tuning each of the three till antenna circuits.
- a sending device indicated by the coils 10 and 11 is coupled with the circuits of antennae 1 and 21
- a receivmg device 12 is coupled with the remaining antenna circuit. In the operation of this apparatus, the coils 4 and 5 are so balanced that the energy delivered from the coils 10 and 11 does not aliect the receiving apparatus connected to the coil 12.
- connection and the several line wires are indicated by condensers 18, 19 and 20 instead of by antennae as shown in Fig. 1, although both methods of coupling are equally available.
- the two coils 4 and 5 are energized by the coils 10 and 11 associated with the sending device 8,.
- the similarly numbered coils are energized by the sending device 3,.
- the coils 4 and 5 at S together with the condensers 18 and 19 may be regarded as constituting two arms of a Wheatstone bridge. The other two arms are made of the coils l and 5 and the condensers 18 and 19 at station B.
- the line wires 15 and 16 constitute two junctions of the Wheatstone bridge, the other two junctions being the points 14.
- the coils 6 and condensers 20 together with the line wire 17 thus constitute a diagonal connection of the Wheatstone bridge and, if the balancing were perfect, no energy would be imparted to the receiving devices E and E
- the balancing may be made excessively perfect to prevent the sending device S, from influencing the receiving devic E but it will influence, at least slightly, the receiving device E,. This is because of the necessary diflerence between the two line wires 15 and 16. If desired, this difference may be increased by artific1ally increasing the lack of balance, for example, by adding an extra connection to one of the wires.
- the sending device S delivers practically all of its energy to the receiving device E and the sending device S is similarly related to the receiving device E Signals received at station B from station A are thus much stronger and clearer with the arrangementshown in Fig. 3, even though some signaling is possible with the arrangement shown in Fig. 2.
- This principle is used for connecting a out a code signal.
- the called station will then change its connections. For example, it may interchange the coil 6 and its condenser with either other branch of the star connection. This will result in placing the called and calling station in the relation shown in Fig. 3.
- stations I and II will then be related in the way illustrated in Fig. 3, while stations I and III will still be related in the way illustrated in Fig. 2. It will, however, be noted that, after this change, stations II and III are related as illustrated in Fig. 3 so that the called station is in communication with other stations beside the calling station.
- station I can at any time call either station II or station III. No preliminary unbalancing is needed. If station I desires to communicate with station III without being heard at station II, the coil 6 and its condenser at station I may be interchanged with coil 4 and its condenser. This will result in permitting station I to send signals to station III which not be heard in station II, but station III when repllying will be sending signals that station can hear. For this reason, only part of the conversation could be heard in station II and the conversation could be so managed that it would not be intelligible there, if this is desired.
- a radio signaling system a plurality of line wires, a plurality of stations along the line, a sending device at each of said stations directly coupled to two of the wires, a receiving device at each of the stations directly coupled to another wire, and means at each station for interchanging the devices whereby the receiving device will be directly coupled to one of the wires to which the sending.
- a line comprising a plurality of wires, a plurality of stations along the line, a sending device, and a receiving device at each station, the sending device being directly coupled to all but one of the wires and the receiving device being directly coupled to the remaining wire, the wire to which the receiving device is directly coupled beng different at difierent stations and means at each station for interchanging the coupling so that the receiving device is directly coupled to one of the wires to which the sending devices at other stations are directly coupled.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Mobile Radio Communication Systems (AREA)
- Near-Field Transmission Systems (AREA)
- Details Of Aerials (AREA)
- Emergency Protection Circuit Devices (AREA)
Description
QWQ H5 v fv V C. SCHWARZ SYSTEM OF RADIO COMMUNICATION OVER WIRES Filed Oct. 31, 1921 2 Sheets-Sheet 1 A BEQ VZNTW? @wwtp v ATTURNEKS my. 15, mm;
Q. SCHWARZ SYSTEM OF RADIO COMMUNICATION OVER WIRES Filed Oct. 31, 1921 2 Sheets-Sheet 2 2 IN Elf/V70 31M? 54min rrEn STATES PATENT OFFICE.
GARE SCARZ, OF CHABLOTTENBURG, NEAR BERLIN, GERMANY, ASSIGNOR 1'0 WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PESVANIA.
SYSTEM OF RADIO COMMUNICATION OVER WIRES.
Application filed October 31, 1921, Serial No. 511,835, and in Germany May 26, 1921.
This invention relates to radio signaling. 1t is particularly applicable to signaling over line wires where the line consists of three or more Wires. The invention is an improvement over the system shown in my application, Ser. No. 511,831, filed Oct. 31, 1921, Patent 1,622,679, March 29, 1927.
It is an object of this invention to provide a means whereby any one of a number of stations distributed along a line may be called by any of these stations.
llt isa further object of this invention to provide a means whereby the connections at the calling and the called stations may be rearranged so that communication between these stations can be carried on without inter- Terence from the other stations in the system and without interfering with said other stations.
It is a further object of this invention to provide a method by which signaling along wires between a plurality of stations may be done without requiring as many dillerent sialing frequencies as have heretofore been necessary.
Other objects of the invention and details of the construction used will be apparent from the following description and the drawings, in which igure 1 is a diagrammatic showing in detail of the connections at one station, the connections in the other figures being shown in less detail.
Fig. 2 is a diagrammatic showing of the connections at two stations.
Fig. 3 is a similar showing of a different arrangement of such connections.
Fi. d is a diagram showing connections for tree stations.
Fig. 5 is a diagram illustrating the connection which results from changing the switches in Fig. 4.
The connections shown in Fig. 1 have been described in considerable detail in the above identified application and they are, therefore, only briefly described here. The line wires 15, 16 and 17 have associated with them three antennae 1, 2 and 3. The inductors 4, 5 and 6 are connected to the several antennae and to the common point 14 which is connected to the ground. Condensers 7 8 and 9 in shunt to the several inductors, respectively, adord means tor tuning each of the three till antenna circuits. A sending device indicated by the coils 10 and 11 is coupled with the circuits of antennae 1 and 21 A receivmg device 12 is coupled with the remaining antenna circuit. In the operation of this apparatus, the coils 4 and 5 are so balanced that the energy delivered from the coils 10 and 11 does not aliect the receiving apparatus connected to the coil 12.
In Figure 2, the connections and the several line wires are indicated by condensers 18, 19 and 20 instead of by antennae as shown in Fig. 1, although both methods of coupling are equally available. At station A, the two coils 4 and 5 are energized by the coils 10 and 11 associated with the sending device 8,. At station B, the similarly numbered coils are energized by the sending device 3,. The coils 4 and 5 at S together with the condensers 18 and 19 may be regarded as constituting two arms of a Wheatstone bridge. The other two arms are made of the coils l and 5 and the condensers 18 and 19 at station B. The line wires 15 and 16 constitute two junctions of the Wheatstone bridge, the other two junctions being the points 14. The coils 6 and condensers 20 together with the line wire 17 thus constitute a diagonal connection of the Wheatstone bridge and, if the balancing were perfect, no energy would be imparted to the receiving devices E and E As ex lained in connection with the above identi ed case, the balancing may be made suficiently perfect to prevent the sending device S, from influencing the receiving devic E but it will influence, at least slightly, the receiving device E,. This is because of the necessary diflerence between the two line wires 15 and 16. If desired, this difference may be increased by artific1ally increasing the lack of balance, for example, by adding an extra connection to one of the wires.
When the connections are as shown in Fig. 3, the sending device S delivers practically all of its energy to the receiving device E and the sending device S is similarly related to the receiving device E Signals received at station B from station A are thus much stronger and clearer with the arrangementshown in Fig. 3, even though some signaling is possible with the arrangement shown in Fig. 2.
This principle is used for connecting a out a code signal. The called station will then change its connections. For example, it may interchange the coil 6 and its condenser with either other branch of the star connection. This will result in placing the called and calling station in the relation shown in Fig. 3. For example, if station I has called station II and as a consequence station II has altered its connections, stations I and II will then be related in the way illustrated in Fig. 3, while stations I and III will still be related in the way illustrated in Fig. 2. It will, however, be noted that, after this change, stations II and III are related as illustrated in Fig. 3 so that the called station is in communication with other stations beside the calling station.
This difiiculty is reduced by using the system shown in Fig. 5. Here the several stations are differently connected. With the connections as illustrated, station I can at any time call either station II or station III. No preliminary unbalancing is needed. If station I desires to communicate with station III without being heard at station II, the coil 6 and its condenser at station I may be interchanged with coil 4 and its condenser. This will result in permitting station I to send signals to station III which not be heard in station II, but station III when repllying will be sending signals that station can hear. For this reason, only part of the conversation could be heard in station II and the conversation could be so managed that it would not be intelligible there, if this is desired.
It will be obvious that the system described can be applied to more than three stations, for example, by using more than three line wires. It is equally obvious that over three line wires the system can be applied to a larger number of stations by using difi'erent frequencies for signaling between different groups of stations. Numerous other changes will occur to those skilled in the art. I, therefore, do not wish to limit the invention except as necessitated by the prior art or indicated by the claims I claim as my invention:
1. In a radio signaling system, a plurality of line wires, a plurality of stations along the line, a sending device at each of said stations directly coupled to two of the wires, a receiving device at each of the stations directly coupled to another wire, and means at each station for interchanging the devices whereby the receiving device will be directly coupled to one of the wires to which the sending.
device was directly coupled.
2. In a radio signaling system, a line comprising a plurality of wires, a plurality of stations along the line, a sending device, and a receiving device at each station, the sending device being directly coupled to all but one of the wires and the receiving device being directly coupled to the remaining wire, the wire to which the receiving device is directly coupled beng different at difierent stations and means at each station for interchanging the coupling so that the receiving device is directly coupled to one of the wires to which the sending devices at other stations are directly coupled.
In testimony whereof I aflix my signature.
CARL SCHWARZ.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH83132D DE462580C (en) | 1920-11-03 | 1920-11-03 | Antenna arrangement for influencing lines, in particular high-voltage lines and overhead lines |
DEH85643D DE405791C (en) | 1920-11-03 | 1921-05-27 | Circuit arrangement for operating wire wave stations that are connected to one another via three or more lines |
US511834A US1580539A (en) | 1920-11-03 | 1921-10-31 | Safety arrangement for antenne |
Publications (1)
Publication Number | Publication Date |
---|---|
US1649132A true US1649132A (en) | 1927-11-15 |
Family
ID=40473576
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US511831A Expired - Lifetime US1622679A (en) | 1920-11-03 | 1921-10-31 | Arrangement of connections for sending and receiving electric waves |
US511834A Expired - Lifetime US1580539A (en) | 1920-11-03 | 1921-10-31 | Safety arrangement for antenne |
US511835A Expired - Lifetime US1649132A (en) | 1920-11-03 | 1921-10-31 | System of radio communication over wires |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US511831A Expired - Lifetime US1622679A (en) | 1920-11-03 | 1921-10-31 | Arrangement of connections for sending and receiving electric waves |
US511834A Expired - Lifetime US1580539A (en) | 1920-11-03 | 1921-10-31 | Safety arrangement for antenne |
Country Status (4)
Country | Link |
---|---|
US (3) | US1622679A (en) |
DE (2) | DE462580C (en) |
FR (1) | FR545131A (en) |
GB (1) | GB171097A (en) |
-
1920
- 1920-11-03 DE DEH83132D patent/DE462580C/en not_active Expired
-
1921
- 1921-05-27 DE DEH85643D patent/DE405791C/en not_active Expired
- 1921-10-31 US US511831A patent/US1622679A/en not_active Expired - Lifetime
- 1921-10-31 US US511834A patent/US1580539A/en not_active Expired - Lifetime
- 1921-10-31 US US511835A patent/US1649132A/en not_active Expired - Lifetime
- 1921-11-02 FR FR545131D patent/FR545131A/en not_active Expired
- 1921-11-02 GB GB29167/21A patent/GB171097A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR545131A (en) | 1922-10-06 |
DE405791C (en) | 1924-11-10 |
DE462580C (en) | 1928-07-18 |
GB171097A (en) | 1923-02-02 |
US1580539A (en) | 1926-04-13 |
US1622679A (en) | 1927-03-29 |
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