CA918777A - Alarm circuit supervisory means - Google Patents

Alarm circuit supervisory means

Info

Publication number
CA918777A
CA918777A CA088249A CA88249A CA918777A CA 918777 A CA918777 A CA 918777A CA 088249 A CA088249 A CA 088249A CA 88249 A CA88249 A CA 88249A CA 918777 A CA918777 A CA 918777A
Authority
CA
Canada
Prior art keywords
alarm circuit
supervisory means
circuit supervisory
alarm
supervisory
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
CA088249A
Inventor
B. Mcleod Robert
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.)
Gulf and Western Systems Co
Original Assignee
Gulf and Western Systems 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 Gulf and Western Systems Co filed Critical Gulf and Western Systems Co
Priority to CA140619A priority Critical patent/CA918778A/en
Application granted granted Critical
Publication of CA918777A publication Critical patent/CA918777A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
CA088249A 1969-11-17 1970-07-15 Alarm circuit supervisory means Expired CA918777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA140619A CA918778A (en) 1969-11-17 1972-04-26 Alarm circuit supervisory means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87710769A 1969-11-17 1969-11-17

Publications (1)

Publication Number Publication Date
CA918777A true CA918777A (en) 1973-01-09

Family

ID=25369278

Family Applications (1)

Application Number Title Priority Date Filing Date
CA088249A Expired CA918777A (en) 1969-11-17 1970-07-15 Alarm circuit supervisory means

Country Status (2)

Country Link
US (1) US3599206A (en)
CA (1) CA918777A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757319A (en) * 1971-04-05 1973-09-04 Eaton Corp Security alarm system with bypass
US4191946A (en) * 1977-10-20 1980-03-04 Gonzalez Raymond J Warning apparatus with a line integrity supervisory circuit
DE3165143D1 (en) * 1980-02-07 1984-09-06 Schlumberger Electronics Uk Electricity meters

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500394A (en) * 1966-12-23 1970-03-10 Honeywell Inc Control apparatus

Also Published As

Publication number Publication date
US3599206A (en) 1971-08-10

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