GB2311426B - Guardline system incorporating signal monitors - Google Patents

Guardline system incorporating signal monitors

Info

Publication number
GB2311426B
GB2311426B GB9704739A GB9704739A GB2311426B GB 2311426 B GB2311426 B GB 2311426B GB 9704739 A GB9704739 A GB 9704739A GB 9704739 A GB9704739 A GB 9704739A GB 2311426 B GB2311426 B GB 2311426B
Authority
GB
United Kingdom
Prior art keywords
guardline
system incorporating
signal monitors
incorporating signal
monitors
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 - Fee Related
Application number
GB9704739A
Other versions
GB2311426A (en
GB9704739D0 (en
Inventor
Bryan Fast
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.)
Ricardo AEA Ltd
Original Assignee
AEA Technology PLC
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 AEA Technology PLC filed Critical AEA Technology PLC
Publication of GB9704739D0 publication Critical patent/GB9704739D0/en
Publication of GB2311426A publication Critical patent/GB2311426A/en
Application granted granted Critical
Publication of GB2311426B publication Critical patent/GB2311426B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16528—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values using digital techniques or performing arithmetic operations

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)
GB9704739A 1996-03-23 1997-03-07 Guardline system incorporating signal monitors Expired - Fee Related GB2311426B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9606174.2A GB9606174D0 (en) 1996-03-23 1996-03-23 Signal monitor

Publications (3)

Publication Number Publication Date
GB9704739D0 GB9704739D0 (en) 1997-04-23
GB2311426A GB2311426A (en) 1997-09-24
GB2311426B true GB2311426B (en) 2000-03-15

Family

ID=10790931

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9606174.2A Pending GB9606174D0 (en) 1996-03-23 1996-03-23 Signal monitor
GB9704739A Expired - Fee Related GB2311426B (en) 1996-03-23 1997-03-07 Guardline system incorporating signal monitors

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9606174.2A Pending GB9606174D0 (en) 1996-03-23 1996-03-23 Signal monitor

Country Status (1)

Country Link
GB (2) GB9606174D0 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1474721A (en) * 1973-07-19 1977-05-25
US4677316A (en) * 1983-10-13 1987-06-30 Jeumont-Schneider Corporation Logic circuit with threshold and built-in safety

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1474721A (en) * 1973-07-19 1977-05-25
US4677316A (en) * 1983-10-13 1987-06-30 Jeumont-Schneider Corporation Logic circuit with threshold and built-in safety

Also Published As

Publication number Publication date
GB2311426A (en) 1997-09-24
GB9606174D0 (en) 1996-05-29
GB9704739D0 (en) 1997-04-23

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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)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020307