GB2155223B - A circuit - Google Patents

A circuit

Info

Publication number
GB2155223B
GB2155223B GB08405296A GB8405296A GB2155223B GB 2155223 B GB2155223 B GB 2155223B GB 08405296 A GB08405296 A GB 08405296A GB 8405296 A GB8405296 A GB 8405296A GB 2155223 B GB2155223 B GB 2155223B
Authority
GB
United Kingdom
Prior art keywords
circuit
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
GB08405296A
Other versions
GB8405296D0 (en
GB2155223A (en
Inventor
Adrian Hastings Lay
Dr Nigel Conrad George Preston
Richard Graham Woodhouse
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.)
BL Technology Ltd
Original Assignee
BL Technology Ltd
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 BL Technology Ltd filed Critical BL Technology Ltd
Priority to GB08405296A priority Critical patent/GB2155223B/en
Publication of GB8405296D0 publication Critical patent/GB8405296D0/en
Publication of GB2155223A publication Critical patent/GB2155223A/en
Application granted granted Critical
Publication of GB2155223B publication Critical patent/GB2155223B/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Testing Of Engines (AREA)
GB08405296A 1984-02-29 1984-02-29 A circuit Expired GB2155223B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08405296A GB2155223B (en) 1984-02-29 1984-02-29 A circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08405296A GB2155223B (en) 1984-02-29 1984-02-29 A circuit

Publications (3)

Publication Number Publication Date
GB8405296D0 GB8405296D0 (en) 1984-04-04
GB2155223A GB2155223A (en) 1985-09-18
GB2155223B true GB2155223B (en) 1987-07-08

Family

ID=10557366

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08405296A Expired GB2155223B (en) 1984-02-29 1984-02-29 A circuit

Country Status (1)

Country Link
GB (1) GB2155223B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2595521B1 (en) * 1986-03-07 1988-10-21 Electricite De France TELECOUNTING DEVICE
GB8614198D0 (en) * 1986-06-11 1986-07-16 Salplex Ltd Information handling & control systems
US4839575A (en) * 1986-08-15 1989-06-13 Marathon Electric Manufacturing Corporation Alternator regulator having output monitoring and limiting controls
FR2634899B1 (en) * 1988-07-28 1990-11-30 Merlin Gerin INPUT CIRCUIT, OF THE ALL OR NOTHING TYPE, OF A PROGRAMMABLE CONTROLLER
NL2002741C2 (en) * 2009-04-09 2010-10-13 Ascom Sweden Ab Device, method and assembly for integrity checking of electrical wiring.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB910920A (en) * 1960-06-21 1962-11-21 Pyrene Co Ltd Improvements in or relating to fire-detection circuits
GB1548526A (en) * 1977-10-26 1979-07-18 Tronic Alarms Ltd M Burglar and fire alarm detection circuit monitor
DE2939494B2 (en) * 1979-09-28 1981-07-02 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for intrusion or fire alarm systems
DE2939462C2 (en) * 1979-09-28 1983-01-05 Siemens AG, 1000 Berlin und 8000 München Process and device for the identification of individual detectors in intrusion or fire alarm systems
CA1139859A (en) * 1980-03-06 1983-01-18 Peter Humphries Alarm system
EP0066879A1 (en) * 1981-06-05 1982-12-15 Hekatron GmbH Circuit arrangement for the transmission of measured values to a central station, especially for a fire signalling system

Also Published As

Publication number Publication date
GB8405296D0 (en) 1984-04-04
GB2155223A (en) 1985-09-18

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010228