JPS5321640B2 - - Google Patents

Info

Publication number
JPS5321640B2
JPS5321640B2 JP732844A JP284473A JPS5321640B2 JP S5321640 B2 JPS5321640 B2 JP S5321640B2 JP 732844 A JP732844 A JP 732844A JP 284473 A JP284473 A JP 284473A JP S5321640 B2 JPS5321640 B2 JP S5321640B2
Authority
JP
Japan
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
JP732844A
Other languages
Japanese (ja)
Other versions
JPS4990096A (en
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 filed Critical
Priority to JP732844A priority Critical patent/JPS5321640B2/ja
Priority to US427712A priority patent/US3895369A/en
Publication of JPS4990096A publication Critical patent/JPS4990096A/ja
Publication of JPS5321640B2 publication Critical patent/JPS5321640B2/ja
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G08B25/06—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 power transmission lines

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
JP732844A 1972-12-27 1972-12-27 Expired JPS5321640B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP732844A JPS5321640B2 (en) 1972-12-27 1972-12-27
US427712A US3895369A (en) 1972-12-27 1973-12-26 Supervisory system for abnormal conditions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP732844A JPS5321640B2 (en) 1972-12-27 1972-12-27

Publications (2)

Publication Number Publication Date
JPS4990096A JPS4990096A (en) 1974-08-28
JPS5321640B2 true JPS5321640B2 (en) 1978-07-04

Family

ID=11540702

Family Applications (1)

Application Number Title Priority Date Filing Date
JP732844A Expired JPS5321640B2 (en) 1972-12-27 1972-12-27

Country Status (2)

Country Link
US (1) US3895369A (en)
JP (1) JPS5321640B2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5825518Y2 (en) * 1975-07-14 1983-06-01 カブシキガイシヤ エコ− Gas morekeihoukino Shidojikakuninsouchi
US4027286A (en) * 1976-04-23 1977-05-31 Trw Inc. Multiplexed data monitoring system
JPS5534729A (en) * 1978-08-31 1980-03-11 Matsushita Electric Works Ltd Disaster prevention equipment using timee sharing multiplex transmission
US4268822A (en) * 1978-10-18 1981-05-19 The Foxboro Company Apparatus for determining the state of each of a plurality of bi-state devices
CH647361A5 (en) * 1979-10-12 1985-01-15 Zellweger Uster Ag Method and device for detection signal in a remote control system with the influence null passage of power ac power.
IL88443A0 (en) * 1988-11-22 1989-06-30 Giora Harel System and method for telemetering data
US5691691A (en) * 1997-01-06 1997-11-25 Motorola, Inc. Power-line communication system using pulse transmission on the AC line
US5828293A (en) * 1997-06-10 1998-10-27 Northern Telecom Limited Data transmission over a power line communications system
US7616968B2 (en) * 2004-03-23 2009-11-10 Mine Radio Systems Inc. System and method to facilitate overcoming a degradation in transmission through a radiating transmission line communication system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3559176A (en) * 1966-11-25 1971-01-26 Hb Eng Corp Method and system for locating faults in utility electrical power systems
US3550090A (en) * 1968-01-16 1970-12-22 Hb Eng Corp Method and system for determining whether a switch is open or closed
US3689886A (en) * 1971-02-09 1972-09-05 Thomas Industries Inc Control system having transmitter-receiver sets for operating functional device over power lines
CH540608A (en) * 1971-07-01 1973-08-15 Zellweger Uster Ag Method and device for remote transmission of a signal
DE2264025A1 (en) * 1971-12-30 1973-07-05 Yukio Honda INFORMATION SYSTEM

Also Published As

Publication number Publication date
JPS4990096A (en) 1974-08-28
US3895369A (en) 1975-07-15

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