DK141183B - Overvågningsanlæg. - Google Patents

Overvågningsanlæg. Download PDF

Info

Publication number
DK141183B
DK141183B DK251377A DK251377A DK141183B DK 141183 B DK141183 B DK 141183B DK 251377 A DK251377 A DK 251377A DK 251377 A DK251377 A DK 251377A DK 141183 B DK141183 B DK 141183B
Authority
DK
Denmark
Prior art keywords
current
voltage
circuit
fault indication
constant
Prior art date
Application number
DK251377A
Other languages
Danish (da)
English (en)
Other versions
DK141183C (xx
DK251377A (xx
Inventor
Leif Wiberg
Original Assignee
Pan Data Ab
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 Pan Data Ab filed Critical Pan Data Ab
Publication of DK251377A publication Critical patent/DK251377A/da
Publication of DK141183B publication Critical patent/DK141183B/da
Application granted granted Critical
Publication of DK141183C publication Critical patent/DK141183C/da

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
    • G08B25/018—Sensor coding by detecting magnitude of an electrical parameter, e.g. resistance

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Locating Faults (AREA)
DK251377A 1977-05-13 1977-06-07 Overvågningsanlæg. DK141183B (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2010477 1977-05-13
GB2010477A GB1537642A (en) 1977-05-13 1977-05-13 Monitoring arrangement

Publications (3)

Publication Number Publication Date
DK251377A DK251377A (xx) 1978-11-14
DK141183B true DK141183B (da) 1980-01-28
DK141183C DK141183C (xx) 1980-07-07

Family

ID=10140451

Family Applications (1)

Application Number Title Priority Date Filing Date
DK251377A DK141183B (da) 1977-05-13 1977-06-07 Overvågningsanlæg.

Country Status (3)

Country Link
DK (1) DK141183B (xx)
FI (1) FI771836A (xx)
GB (1) GB1537642A (xx)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2090682B (en) * 1981-01-06 1985-09-04 Racal Mesl Security Ltd Electrical circuits for security system

Also Published As

Publication number Publication date
DK141183C (xx) 1980-07-07
GB1537642A (en) 1979-01-04
DK251377A (xx) 1978-11-14
FI771836A (fi) 1978-11-14

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