GB889733A - Improvements relating to inductive loop communication systems - Google Patents
Improvements relating to inductive loop communication systemsInfo
- Publication number
- GB889733A GB889733A GB41572/60A GB4157260A GB889733A GB 889733 A GB889733 A GB 889733A GB 41572/60 A GB41572/60 A GB 41572/60A GB 4157260 A GB4157260 A GB 4157260A GB 889733 A GB889733 A GB 889733A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformer
- loop
- amplifier
- fixed station
- inductive
- 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
- 230000001939 inductive effect Effects 0.000 title abstract 4
- 238000004804 winding Methods 0.000 abstract 3
- 230000011664 signaling Effects 0.000 abstract 2
- 230000004907 flux Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
- H04B5/266—One coil at each side, e.g. with primary and secondary coils
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
889,733. Inductive signalling. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Dec. 2, 1960, No. 41572/60. Class 40(5). In a two-way inductive signalling system signals from a microphone 9 at a fixed station A are fed via an amplifier 2 and transformer 7 to points 3 and 4 on an inductive loop 1, the point 3 being a tap on the primary winding of a transformer 6 arranged so that the resultant flux is zero for the signal currents from the fixed station flowing in opposite directions through the two portions of the primary winding. In this way feedback via the secondary winding 8 of the transformer 6 to the amplifier 2 is avoided. The signal currents in the two halves of the loop 1 are received by pick-up coils 11 and affect signal-responsive devices at mobile stations B, C. If either of stations B, C wishes to communicate with the other or with the fixed station, signal currents impressed on a coil 11 circulate in the loop and via the transformer 6 are supplied to the amplifier 2 and reproduced at 10. The amplified signals are also supplied back to the loop via the transformer 7 for reception by the other mobile station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB41572/60A GB889733A (en) | 1960-12-02 | 1960-12-02 | Improvements relating to inductive loop communication systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB41572/60A GB889733A (en) | 1960-12-02 | 1960-12-02 | Improvements relating to inductive loop communication systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB889733A true GB889733A (en) | 1962-02-21 |
Family
ID=10420315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB41572/60A Expired GB889733A (en) | 1960-12-02 | 1960-12-02 | Improvements relating to inductive loop communication systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB889733A (en) |
-
1960
- 1960-12-02 GB GB41572/60A patent/GB889733A/en not_active Expired
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