GB1383777A - Security system - Google Patents

Security system

Info

Publication number
GB1383777A
GB1383777A GB2451872A GB2451872A GB1383777A GB 1383777 A GB1383777 A GB 1383777A GB 2451872 A GB2451872 A GB 2451872A GB 2451872 A GB2451872 A GB 2451872A GB 1383777 A GB1383777 A GB 1383777A
Authority
GB
United Kingdom
Prior art keywords
station
loop
fault
address
relay
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
GB2451872A
Other languages
English (en)
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.)
Oak Electro Netics Corp
Original Assignee
Oak Electro Netics Corp
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 Oak Electro Netics Corp filed Critical Oak Electro Netics Corp
Publication of GB1383777A publication Critical patent/GB1383777A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/005—Alarm systems in which substations are interrogated in succession by a central station with substations connected in series, e.g. cascade
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Alarm Systems (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB2451872A 1971-05-24 1972-05-24 Security system Expired GB1383777A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14611171A 1971-05-24 1971-05-24

Publications (1)

Publication Number Publication Date
GB1383777A true GB1383777A (en) 1974-02-12

Family

ID=22515891

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2451872A Expired GB1383777A (en) 1971-05-24 1972-05-24 Security system

Country Status (7)

Country Link
US (1) US3765016A (enExample)
CA (1) CA1003066A (enExample)
DE (1) DE2225244A1 (enExample)
FR (1) FR2138931A1 (enExample)
GB (1) GB1383777A (enExample)
IT (1) IT958001B (enExample)
ZA (1) ZA723558B (enExample)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111982A1 (en) * 1982-12-17 1984-06-27 ADT, Inc. Integrated security system having a multiprogrammed controller
GB2168517A (en) * 1984-12-18 1986-06-18 Gent Ltd Information transmission system
GB2173618A (en) * 1985-04-12 1986-10-15 Emi Ltd Alarm monitoring installation
GB2180085A (en) * 1985-07-19 1987-03-18 Hochiki Co Emergency supervisory system
GB2259797A (en) * 1991-09-19 1993-03-24 Rockwell International Corp Fault tolerant multi-drop communications system
USRE34643E (en) * 1983-07-05 1994-06-21 Apollo Fire Detectors Limited Short circuit fault isolation means for electrical circuit arrangements
US5631795A (en) * 1993-05-25 1997-05-20 Hochiki Corporation Line fault monitoring apparatus
US5801913A (en) * 1996-04-29 1998-09-01 Kiddie-Fenwal, Inc. Isolation circuitry

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939460A (en) * 1974-04-24 1976-02-17 Barry N. Horn Security alarm system
DE2536946C2 (de) * 1975-08-19 1986-02-27 Firecom Inc., Woodside, N.Y. Schaltungsanordnung zur Überwachung von Ferneinheiten
JPS53136500A (en) * 1977-05-02 1978-11-29 Hochiki Co Alarm system
CA1216340A (en) * 1982-05-14 1987-01-06 Dale R. Younge Intrusion detector
JPS60186994A (ja) * 1984-03-05 1985-09-24 ホーチキ株式会社 火災感知器
US4796025A (en) * 1985-06-04 1989-01-03 Simplex Time Recorder Co. Monitor/control communication net with intelligent peripherals
CH668496A5 (de) * 1985-07-10 1988-12-30 Cerberus Ag Verfahren zur uebertragung von messwerten in einem ueberwachungssystem.
FR2633761B1 (fr) * 1988-06-30 1995-03-17 Hugon Emile Detecteur de fumees avec circuit integre pour adresse
FR2636157A1 (fr) * 1988-09-08 1990-03-09 Hugon Emile Centrale d'adresse et de programmation de detecteur d'alarme incendie
US5687215A (en) * 1995-04-10 1997-11-11 Ford Motor Company Vehicular emergency message system
US5686910A (en) * 1995-04-10 1997-11-11 Ford Motor Company Vehicular emergency message system with automatic periodic call-in
US5572204A (en) * 1995-04-10 1996-11-05 Ford Motor Company Vehicular emergency message system
US5890061A (en) * 1996-02-09 1999-03-30 Ford Motor Company Vehicular emergency message system with call restriction defeating

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3214734A (en) * 1959-06-19 1965-10-26 American District Telegraph Co Protection signalling system having channel impedance alteration means for providing indications of remote station conditions
US3349374A (en) * 1963-08-05 1967-10-24 Motorola Inc Supervisory control system with message traffic control
US3350580A (en) * 1965-11-30 1967-10-31 Sperry Rand Corp Monitor employing logic gate and counter to indicate normal pulse-train failure after predetermined time interval
GB1178957A (en) * 1968-04-29 1970-01-28 Goodwin Alfred George Ive Improvements in and relating to Electrical Protective Systems
US3676878A (en) * 1968-10-14 1972-07-11 Riley Co The Variable monitoring system
US3624649A (en) * 1969-10-10 1971-11-30 Honeywell Inc Period readout error checking apparatus

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111982A1 (en) * 1982-12-17 1984-06-27 ADT, Inc. Integrated security system having a multiprogrammed controller
USRE34643E (en) * 1983-07-05 1994-06-21 Apollo Fire Detectors Limited Short circuit fault isolation means for electrical circuit arrangements
GB2168517A (en) * 1984-12-18 1986-06-18 Gent Ltd Information transmission system
EP0191239A1 (en) * 1984-12-18 1986-08-20 Gent Limited Information transmission system
GB2173618A (en) * 1985-04-12 1986-10-15 Emi Ltd Alarm monitoring installation
GB2180085A (en) * 1985-07-19 1987-03-18 Hochiki Co Emergency supervisory system
GB2180085B (en) * 1985-07-19 1989-07-26 Hochiki Co Emergency supervisory system
GB2259797A (en) * 1991-09-19 1993-03-24 Rockwell International Corp Fault tolerant multi-drop communications system
GB2259797B (en) * 1991-09-19 1995-08-16 Rockwell International Corp Fault tolerant multi-drop communications system
US5631795A (en) * 1993-05-25 1997-05-20 Hochiki Corporation Line fault monitoring apparatus
US5801913A (en) * 1996-04-29 1998-09-01 Kiddie-Fenwal, Inc. Isolation circuitry

Also Published As

Publication number Publication date
CA1003066A (en) 1977-01-04
IT958001B (it) 1973-10-20
FR2138931A1 (enExample) 1973-01-05
ZA723558B (en) 1973-03-28
DE2225244A1 (de) 1972-12-14
US3765016A (en) 1973-10-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees