GB1039800A - Improvements relating to electric control and signalling apparatus - Google Patents

Improvements relating to electric control and signalling apparatus

Info

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
Application number
GB4840663A
Inventor
John David Lewis Rose
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
QUARNDON ELECTRONICS Ltd
Original Assignee
QUARNDON ELECTRONICS Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by QUARNDON ELECTRONICS Ltd filed Critical QUARNDON ELECTRONICS Ltd
Priority to GB4840663A priority Critical patent/GB1039800A/en
Publication of GB1039800A publication Critical patent/GB1039800A/en
Expired legal-status Critical Current

Links

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.
GB4840663A 1963-12-07 1963-12-07 Improvements relating to electric control and signalling apparatus Expired GB1039800A (en)

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)

* Cited by examiner, † Cited by third party
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
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
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

Cited By (3)

* Cited by examiner, † Cited by third party
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
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
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

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