GB1146583A - Improvements in or relating to information communication systems - Google Patents
Improvements in or relating to information communication systemsInfo
- Publication number
- GB1146583A GB1146583A GB88765A GB88765A GB1146583A GB 1146583 A GB1146583 A GB 1146583A GB 88765 A GB88765 A GB 88765A GB 88765 A GB88765 A GB 88765A GB 1146583 A GB1146583 A GB 1146583A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulses
- network
- enabled
- signal
- transmitted
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
- G08C15/06—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Selective Calling Equipment (AREA)
Abstract
1,146,583. Selective signalling. SERCK CONTROLS Ltd. 1 April, 1966 [8 Jan., 1965], No. 887/65. Heading G4H. A communication system comprises a plurality of transmitting networks 1, 2, 3, 4 (Fig. 1), the signals from which are time multiplexed on a common communication channel, synchronization being effected by a transmitter or land line circuit operating at a frequency which is lower than that of the communication channel by a factor of ten. In the embodiment described a selection gate 13 is enabled when a train of five pulses is received at a signal receiver 9 so that a signal representing an eloctricity network 1 is transmitted to the common channel 17. After a predetermined delay the output from a water network 2 is transmitted. When a pulse train of six pulses is received a selection gate 15 is enabled to transmit a signal from a gas network 3 and similarly after a fixed delay any signal from an emergency network 4 is transmitted via a gate 16. For the sequences of five and six pulses to trigger the respective systems it is arranged that five pulses must precede the six pulses and vice versa, the networks not being enabled if this sequence is not maintained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB88765A GB1146583A (en) | 1965-01-08 | 1965-01-08 | Improvements in or relating to information communication systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB88765A GB1146583A (en) | 1965-01-08 | 1965-01-08 | Improvements in or relating to information communication systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1146583A true GB1146583A (en) | 1969-03-26 |
Family
ID=9712236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB88765A Expired GB1146583A (en) | 1965-01-08 | 1965-01-08 | Improvements in or relating to information communication systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1146583A (en) |
-
1965
- 1965-01-08 GB GB88765A patent/GB1146583A/en not_active Expired
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