GB1039800A - Improvements relating to electric control and signalling apparatus - Google Patents
Improvements relating to electric control and signalling apparatusInfo
- Publication number
- GB1039800A GB1039800A GB4840663A GB4840663A GB1039800A GB 1039800 A GB1039800 A GB 1039800A GB 4840663 A GB4840663 A GB 4840663A GB 4840663 A GB4840663 A GB 4840663A GB 1039800 A GB1039800 A GB 1039800A
- Authority
- GB
- United Kingdom
- Prior art keywords
- station
- remote station
- remote
- numbers
- switch
- 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
- 230000011664 signaling Effects 0.000 title abstract 3
- 230000001934 delay Effects 0.000 abstract 2
- 238000005070 sampling Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B1/00—Systems for signalling characterised solely by the form of transmission of the signal
- G08B1/08—Systems for signalling characterised solely by the form of transmission of the signal using electric transmission ; transformation of alarm signals to electrical signals from a different medium, e.g. transmission of an electric alarm signal upon detection of an audible alarm signal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Audible And Visible Signals (AREA)
Abstract
1,039,800. Selective signalling. QUARNDON ELECTRONICS Ltd. March 8, 1965 [Dec. 7, 1963], No. 48406/63. Heading G4H. In a signalling system in which a central station is to indicate the condition of a plurality of two-position switches one at each of a corresponding plurality of remote field stations, which may for example be spaced alongside a long conveyer in a mine, the central station transmits a sampling pulse to the first remote station which delays it by one bit period (20 ms.) and passes it to the next remote station, which delays it and passes it to the next remote station, and so on, and any remote station at which a switch is on initiates a reply pulse which is transmitted along the same channel back to the central station where, by its time of receipt it may be ascribed to a particular remote station whose identity is then indicated on lamps. The reply pulses are arranged to interleave the clock pulses passed from station to station. In a first embodiment a single indicating lamp is provided for each remote station. In a second embodiment a single indicator of the type that can display numbers from 0 to 99 is caused to display sequentially the numbers of each remote station at which a switch has been turned on. The arrangement is such that if a single switch only is on then its number is displayed continuously. However, if two or more are turned on then their numbers are displayed (each for the same direction, typically 1 to 3 seconds) cyclically and respectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4840663A GB1039800A (en) | 1963-12-07 | 1963-12-07 | Improvements relating to electric control and signalling apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4840663A GB1039800A (en) | 1963-12-07 | 1963-12-07 | Improvements relating to electric control and signalling apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1039800A true GB1039800A (en) | 1966-08-24 |
Family
ID=10448506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4840663A Expired GB1039800A (en) | 1963-12-07 | 1963-12-07 | Improvements relating to electric control and signalling apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1039800A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4441302A (en) * | 1979-08-02 | 1984-04-10 | Molins Limited | Cigarette packaging machine control and monitoring system |
GB2135798A (en) * | 1983-02-15 | 1984-09-05 | Gd Spa | A system for monitoring the operation of input circuits to a central control and monitoring unit for machines and/or devices usable in production and/or product packaging lines |
GB2135799A (en) * | 1983-02-15 | 1984-09-05 | Gd Spa | A system for monitoring the operation of output transducers of a central control and monitoring unit for machines and/or devices usable in production and/or product packaging lines |
-
1963
- 1963-12-07 GB GB4840663A patent/GB1039800A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4441302A (en) * | 1979-08-02 | 1984-04-10 | Molins Limited | Cigarette packaging machine control and monitoring system |
GB2135798A (en) * | 1983-02-15 | 1984-09-05 | Gd Spa | A system for monitoring the operation of input circuits to a central control and monitoring unit for machines and/or devices usable in production and/or product packaging lines |
GB2135799A (en) * | 1983-02-15 | 1984-09-05 | Gd Spa | A system for monitoring the operation of output transducers of a central control and monitoring unit for machines and/or devices usable in production and/or product packaging lines |
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