GB1299427A - Improvements relating to electrical communication systems - Google Patents

Improvements relating to electrical communication systems

Info

Publication number
GB1299427A
GB1299427A GB804770A GB804770A GB1299427A GB 1299427 A GB1299427 A GB 1299427A GB 804770 A GB804770 A GB 804770A GB 804770 A GB804770 A GB 804770A GB 1299427 A GB1299427 A GB 1299427A
Authority
GB
United Kingdom
Prior art keywords
line
receiver
impedance
transmitter
pulses
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
GB804770A
Inventor
Adrian James Shiner
Colin Raymond Edwards
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.)
British Aircraft Corp Ltd
Original Assignee
British Aircraft Corp 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 British Aircraft Corp Ltd filed Critical British Aircraft Corp Ltd
Priority to GB804770A priority Critical patent/GB1299427A/en
Publication of GB1299427A publication Critical patent/GB1299427A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H04Q9/14—Calling by using pulses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/407—Bus networks with decentralised control
    • H04L12/413—Bus networks with decentralised control with random access, e.g. carrier-sense multiple-access with collision detection (CSMA-CD)
    • H04L12/4135—Bus networks with decentralised control with random access, e.g. carrier-sense multiple-access with collision detection (CSMA-CD) using bit-wise arbitration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40267—Bus for use in transportation systems
    • H04L2012/4028—Bus for use in transportation systems the transportation system being an aircraft

Abstract

1299427 Selective signalling BRITISH AIRCRAFT CORP Ltd 19 April 1971 [19 Feb 1969] 8047/70 Heading G4H An electrical communication system includes a transmission line connected at one end to a transmitter and terminated at the other end by the characteristic impedance of the line, and at least one receiver connected to an intermediate point along the line, the receiver including encoding means operative during a transmission to the reveiver to intermittently load the line with an impedance, whereby the resulting characteristic variations in the line voltage constitute a binary coded response to the transmitted signal. The transmitter selects the receiver in turn by transmitting a chain code which is recognised by a shift register in the appropriate receiver. The states of manual switches in the selected receiver are encoded, and in response to a train of pulses on the line from the transmitter, the pulses of the encoded results are each used to connect the impedance mentioned to the line, the resulting pattern of variations in line voltage being decoded at the transmitter and used to effect indication or control. The load impedance in each receiver has the same value as the terminating impedance of the line, which is a coaxial cable. The system can be used for passenger requirement signalling in an aircraft.
GB804770A 1970-02-19 1970-02-19 Improvements relating to electrical communication systems Expired GB1299427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB804770A GB1299427A (en) 1970-02-19 1970-02-19 Improvements relating to electrical communication systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB804770A GB1299427A (en) 1970-02-19 1970-02-19 Improvements relating to electrical communication systems

Publications (1)

Publication Number Publication Date
GB1299427A true GB1299427A (en) 1972-12-13

Family

ID=9844770

Family Applications (1)

Application Number Title Priority Date Filing Date
GB804770A Expired GB1299427A (en) 1970-02-19 1970-02-19 Improvements relating to electrical communication systems

Country Status (1)

Country Link
GB (1) GB1299427A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2343288A1 (en) * 1976-03-01 1977-09-30 Laitram Corp DATA SYSTEM
EP0084526A2 (en) * 1982-01-19 1983-07-27 Lykke Olesen Data transmission device
GB2162724A (en) * 1984-07-20 1986-02-05 Messerschmitt Boelkow Blohm A method of and arrangement for carrying out passenger-related and/or air-steward-related functions in an aircraft
GB2168880A (en) * 1984-12-08 1986-06-25 Messerschmitt Boelkow Blohm A method of and arrangement for performing passenger-related and/or air-steward-related functions in an aircraft
WO1988002527A1 (en) * 1986-09-29 1988-04-07 Shepherd Intelligence Systems, Inc. Aircraft security system
US5063371A (en) * 1986-09-29 1991-11-05 Oyer Michael W Aircraft security system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2343288A1 (en) * 1976-03-01 1977-09-30 Laitram Corp DATA SYSTEM
EP0084526A2 (en) * 1982-01-19 1983-07-27 Lykke Olesen Data transmission device
EP0084526A3 (en) * 1982-01-19 1983-09-07 Lykke Olesen Data transmission device
GB2162724A (en) * 1984-07-20 1986-02-05 Messerschmitt Boelkow Blohm A method of and arrangement for carrying out passenger-related and/or air-steward-related functions in an aircraft
GB2168880A (en) * 1984-12-08 1986-06-25 Messerschmitt Boelkow Blohm A method of and arrangement for performing passenger-related and/or air-steward-related functions in an aircraft
WO1988002527A1 (en) * 1986-09-29 1988-04-07 Shepherd Intelligence Systems, Inc. Aircraft security system
US4933668A (en) * 1986-09-29 1990-06-12 Shepherd Intelligence Systems, Inc. Aircraft security system
US5063371A (en) * 1986-09-29 1991-11-05 Oyer Michael W Aircraft security system

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee