GB289102A - Improvements in and relating to telephonic and radio-telephonic systems of communication - Google Patents
Improvements in and relating to telephonic and radio-telephonic systems of communicationInfo
- Publication number
- GB289102A GB289102A GB11947/28A GB1194728A GB289102A GB 289102 A GB289102 A GB 289102A GB 11947/28 A GB11947/28 A GB 11947/28A GB 1194728 A GB1194728 A GB 1194728A GB 289102 A GB289102 A GB 289102A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cage
- telephonic
- receiver
- local
- rotating
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/04—Distributors combined with modulators or demodulators
- H04J3/045—Distributors with CRT
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
289,102. Loeb, J. M. April 23, 1927, [Convention date]. Void [Published under Sect. 91 of the Acts]. Drawings to Specification. Vacuum tubes.-For multiplexing telephone conversations &c. by distributors having a frequency say four times the highest acoustic frequency which it is desired to reproduce, electronic distributors may be used, each comprising a central filament, a grid and plate for each conversation channel and for a synchronizing channel, and a cage of wires carrying threephase currents for creating a rotating magnetic field (say 16,000 rotations per second) which makes the channels effective in turn by directing the electron-flow towards the different plates. The rotating field systems of the transmitter and receiver are supplied by local three-phase sources; lack of synchronism is corrected by mounting the cage at the receiver on a synchronous motor, of which the rotor is connected in the synchronizing channel while the stator is fed from the local three-phase source, so that the cage rotates with a speed equal to the difference of of the speeds of the two rotating fields.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR289102X | 1927-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB289102A true GB289102A (en) | 1929-02-28 |
Family
ID=8887555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11947/28A Expired GB289102A (en) | 1927-04-23 | 1928-04-23 | Improvements in and relating to telephonic and radio-telephonic systems of communication |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB289102A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2559644A (en) * | 1948-09-18 | 1951-07-10 | Rca Corp | Pulse multiplex system |
| US2579070A (en) * | 1945-02-14 | 1951-12-18 | Rca Corp | Multiplex communication system |
-
1928
- 1928-04-23 GB GB11947/28A patent/GB289102A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2579070A (en) * | 1945-02-14 | 1951-12-18 | Rca Corp | Multiplex communication system |
| US2559644A (en) * | 1948-09-18 | 1951-07-10 | Rca Corp | Pulse multiplex system |
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