GB865580A - Improvements in and relating to communicating systems - Google Patents
Improvements in and relating to communicating systemsInfo
- Publication number
- GB865580A GB865580A GB36115/56A GB3611556A GB865580A GB 865580 A GB865580 A GB 865580A GB 36115/56 A GB36115/56 A GB 36115/56A GB 3611556 A GB3611556 A GB 3611556A GB 865580 A GB865580 A GB 865580A
- Authority
- GB
- United Kingdom
- Prior art keywords
- receiver
- signal
- transmitter
- calling signal
- calling
- 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
- 230000005670 electromagnetic radiation Effects 0.000 abstract 1
- 230000006698 induction Effects 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
865,580. Communication systems. FERGUSON RADIO CORPORATION Ltd. Sept. 23, 1957 [Nov. 26, 1956], No. 36115/56. Class 40(5) A receiver generates a signal in response to a calling signal from the transmitter, the signal generated at the receiver continuing after cessation of the transmitted calling signal until it is suppressed by manually-operable means in the receiver. A paging system comprises a transmitter 11 which feeds an inductive wire-loop aerial 13 arranged to encircle an area required for communication. Calling signals of frequency particular to the receiver being called are transmitted over aerial 13 and received by the ferrite rod aerial 14 before passing through the audiofrequency amplifier 15 to the band-pass filter 18 and thence to the oscillator 19. Application of the calling signal starts the oscillator which provides an audible alarm by a loudspeaker and continues to oscillate after the removal of the calling signal and until the LT supply is disconnected by the manually operated switch 16. Switch 16 also connects the output of the amplifier to the loadspeaker so that a message transmitted from the central transmitter can be received by the receiver. Signalling may be by electro-magnetic radiation instead of induction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB36115/56A GB865580A (en) | 1956-11-26 | 1956-11-26 | Improvements in and relating to communicating systems |
| FR1185277D FR1185277A (en) | 1956-11-26 | 1957-10-28 | Improvements to electrical transmission systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB36115/56A GB865580A (en) | 1956-11-26 | 1956-11-26 | Improvements in and relating to communicating systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB865580A true GB865580A (en) | 1961-04-19 |
Family
ID=10385110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36115/56A Expired GB865580A (en) | 1956-11-26 | 1956-11-26 | Improvements in and relating to communicating systems |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1185277A (en) |
| GB (1) | GB865580A (en) |
-
1956
- 1956-11-26 GB GB36115/56A patent/GB865580A/en not_active Expired
-
1957
- 1957-10-28 FR FR1185277D patent/FR1185277A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1185277A (en) | 1959-07-31 |
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