JPS4990096A - - Google Patents

Info

Publication number
JPS4990096A
JPS4990096A JP48002844A JP284473A JPS4990096A JP S4990096 A JPS4990096 A JP S4990096A JP 48002844 A JP48002844 A JP 48002844A JP 284473 A JP284473 A JP 284473A JP S4990096 A JPS4990096 A JP S4990096A
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.)
Granted
Application number
JP48002844A
Other languages
Japanese (ja)
Other versions
JPS5321640B2 (https=
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 SYSTEMS, e.g. PERSONAL 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 (https=)

Priority Applications (2)

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

Publications (2)

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

Family

ID=11540702

Family Applications (1)

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

Country Status (2)

Country Link
US (1) US3895369A (https=)
JP (1) JPS5321640B2 (https=)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5211217U (https=) * 1975-07-14 1977-01-26
JPS5534729A (en) * 1978-08-31 1980-03-11 Matsushita Electric Works Ltd Disaster prevention equipment using timee sharing multiplex transmission

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027286A (en) * 1976-04-23 1977-05-31 Trw Inc. Multiplexed data monitoring system
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 (de) * 1979-10-12 1985-01-15 Zellweger Uster Ag Verfahren und vorrichtung zur signalerkennung bei einem fernsteuersystem mit beeinflussung des nulldurchganges der netzwechselspannung.
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 (de) * 1971-07-01 1973-08-15 Zellweger Uster Ag Verfahren und Vorrichtung zur Fernübertragung eines Signales
DE2264025A1 (de) * 1971-12-30 1973-07-05 Yukio Honda Informationssystem

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5211217U (https=) * 1975-07-14 1977-01-26
JPS5534729A (en) * 1978-08-31 1980-03-11 Matsushita Electric Works Ltd Disaster prevention equipment using timee sharing multiplex transmission

Also Published As

Publication number Publication date
US3895369A (en) 1975-07-15
JPS5321640B2 (https=) 1978-07-04

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