CA1062792A - Central station system transmission apparatus - Google Patents

Central station system transmission apparatus

Info

Publication number
CA1062792A
CA1062792A CA271,345A CA271345A CA1062792A CA 1062792 A CA1062792 A CA 1062792A CA 271345 A CA271345 A CA 271345A CA 1062792 A CA1062792 A CA 1062792A
Authority
CA
Canada
Prior art keywords
conductors
current
central station
conductor
data
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
CA271,345A
Other languages
English (en)
French (fr)
Inventor
James J. Bernitt
Prem P. Jain
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.)
American District Telegraph Co
Original Assignee
American District Telegraph Co
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 American District Telegraph Co filed Critical American District Telegraph Co
Application granted granted Critical
Publication of CA1062792A publication Critical patent/CA1062792A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/001—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel
    • G08B26/002—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel only replying the state of the sensor
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR 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
    • G08B29/16—Security signalling or alarm systems, e.g. redundant systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Selective Calling Equipment (AREA)
  • Time-Division Multiplex Systems (AREA)
CA271,345A 1976-05-28 1977-02-08 Central station system transmission apparatus Expired CA1062792A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/690,992 US4068105A (en) 1976-05-28 1976-05-28 Central station system transmission apparatus

Publications (1)

Publication Number Publication Date
CA1062792A true CA1062792A (en) 1979-09-18

Family

ID=24774758

Family Applications (1)

Application Number Title Priority Date Filing Date
CA271,345A Expired CA1062792A (en) 1976-05-28 1977-02-08 Central station system transmission apparatus

Country Status (6)

Country Link
US (1) US4068105A (enExample)
BE (1) BE854022A (enExample)
CA (1) CA1062792A (enExample)
FR (1) FR2353187A1 (enExample)
GB (1) GB1526177A (enExample)
IT (1) IT1083351B (enExample)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4264894A (en) * 1979-06-18 1981-04-28 Ellington Stephen P Fault bypass for data transmission system
FR2473820A1 (fr) * 1980-01-11 1981-07-17 Telecommunications Sa Procede et systeme d'initialisation de la securisation d'une ligne d'une artere de transmission numerique
FR2473819B1 (fr) * 1980-01-11 1985-12-13 Telecommunications Sa Procede et systeme de securisation d'une artere de transmission numerique
IT1169166B (it) * 1983-02-15 1987-05-27 Gd Spa Sistema di controllo funzionale di circuiti in ingresso a un'unita' centrale di controllo e comando per macchine e/o dispositivi utilizzabili in linee di produzione e/o confezionamento di prodotti
US4575588A (en) * 1984-10-15 1986-03-11 Michael Vande Vyver Universal telephone test apparatus
GB2173618B (en) * 1985-04-12 1988-09-14 Emi Ltd Alarm monitoring installation
JPS63100843A (ja) * 1986-10-16 1988-05-02 Nippon Denso Co Ltd 通信制御機構
GB8704375D0 (en) * 1987-02-25 1987-04-01 Rentokil Ltd Pest monitoring system
US4916432A (en) * 1987-10-21 1990-04-10 Pittway Corporation Smoke and fire detection system communication
JPH01137853A (ja) * 1987-11-25 1989-05-30 Toshiba Corp 通信制御システム
DE58908506D1 (de) * 1989-02-17 1994-11-17 Bosch Gmbh Robert Netzwerkschnittstelle.
US5059953A (en) * 1990-04-10 1991-10-22 Pacific Scientific Company Infrared overheat and fire detection system
JP2857298B2 (ja) * 1993-03-16 1999-02-17 ホーチキ株式会社 防災監視装置
US5715174A (en) * 1994-11-15 1998-02-03 Absolute Software Corporation Security apparatus and method
US6470405B2 (en) * 1995-10-19 2002-10-22 Rambus Inc. Protocol for communication with dynamic memory
US6266379B1 (en) * 1997-06-20 2001-07-24 Massachusetts Institute Of Technology Digital transmitter with equalization
US6215998B1 (en) * 1997-12-11 2001-04-10 Nortel Networks Limited Local component-specific console
US6598229B2 (en) * 1998-11-20 2003-07-22 Diva Systems Corp. System and method for detecting and correcting a defective transmission channel in an interactive information distribution system
US20030210139A1 (en) * 2001-12-03 2003-11-13 Stephen Brooks Method and system for improved security
US8601606B2 (en) 2002-11-25 2013-12-03 Carolyn W. Hafeman Computer recovery or return
US7075285B2 (en) * 2004-05-12 2006-07-11 Richard Chin Delay locked loop circuit and method for testing the operability of the circuit
US9547780B2 (en) * 2005-03-28 2017-01-17 Absolute Software Corporation Method for determining identification of an electronic device
US20080071789A1 (en) * 2006-09-01 2008-03-20 Staniey Anthony Kwasiborski Ifslgovwatch
US9782527B2 (en) * 2009-05-27 2017-10-10 Tc1 Llc Monitoring of redundant conductors
US9450644B2 (en) * 2012-09-19 2016-09-20 Qualcomm Incorporated Higher order multiple input multiple output in ethernet
JP7064890B2 (ja) * 2018-01-22 2022-05-11 ホーチキ株式会社 火災報知設備

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US253080A (en) * 1882-01-31 District-telegraph system
US477068A (en) * 1892-06-14 Fire-alarm system
US3500377A (en) * 1966-10-21 1970-03-10 American District Telegraph Co Noninterfering electrical signaling system
US3497619A (en) * 1967-10-06 1970-02-24 Us Navy Digital data transmission system
US3652867A (en) * 1970-05-28 1972-03-28 Milton Bocin Device for connecting a substitute current path in case of line break
US3987341A (en) * 1975-04-03 1976-10-19 I-T-E Imperial Corporation Open neutral protection
US3989908A (en) * 1975-06-26 1976-11-02 General Signal Corporation Speaker supervision in a public address system

Also Published As

Publication number Publication date
US4068105A (en) 1978-01-10
FR2353187A1 (fr) 1977-12-23
FR2353187B1 (enExample) 1984-05-25
BE854022A (fr) 1977-10-27
IT1083351B (it) 1985-05-21
GB1526177A (en) 1978-09-27

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