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GB2175113B - Alarm system - Google Patents

Alarm system

Info

Publication number
GB2175113B
GB2175113B GB08512538A GB8512538A GB2175113B GB 2175113 B GB2175113 B GB 2175113B GB 08512538 A GB08512538 A GB 08512538A GB 8512538 A GB8512538 A GB 8512538A GB 2175113 B GB2175113 B GB 2175113B
Authority
GB
United Kingdom
Prior art keywords
alarm system
alarm
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
GB08512538A
Other versions
GB2175113A (en
GB8512538D0 (en
Inventor
Thomas Hopwood
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB08512538A priority Critical patent/GB2175113B/en
Publication of GB8512538D0 publication Critical patent/GB8512538D0/en
Publication of GB2175113A publication Critical patent/GB2175113A/en
Application granted granted Critical
Publication of GB2175113B publication Critical patent/GB2175113B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B1/00—Systems for signalling characterised solely by the form of transmission of the signal
    • G08B1/08—Systems for signalling characterised solely by the form of transmission of the signal using electric transmission ; transformation of alarm signals to electrical signals from a different medium, e.g. transmission of an electric alarm signal upon detection of an audible alarm signal
    • 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
    • G08B25/08—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 communication transmission lines

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Alarm Systems (AREA)
GB08512538A 1985-05-17 1985-05-17 Alarm system Expired GB2175113B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08512538A GB2175113B (en) 1985-05-17 1985-05-17 Alarm system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08512538A GB2175113B (en) 1985-05-17 1985-05-17 Alarm system

Publications (3)

Publication Number Publication Date
GB8512538D0 GB8512538D0 (en) 1985-06-19
GB2175113A GB2175113A (en) 1986-11-19
GB2175113B true GB2175113B (en) 1988-10-12

Family

ID=10579302

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08512538A Expired GB2175113B (en) 1985-05-17 1985-05-17 Alarm system

Country Status (1)

Country Link
GB (1) GB2175113B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB587627A (en) * 1944-09-09 1947-05-01 Donald Jackson Improvements in or relating to radio receiving devices
US3757323A (en) * 1971-01-12 1973-09-04 Interelectronics Corp D-c monitoring system using two-wire transmission lines
GB2027239A (en) * 1978-07-18 1980-02-13 Gorman P E Alarms for summoning assistance
GB2093241B (en) * 1981-02-13 1984-08-01 Mansfield Joan Distress alarm apparatus for buldings

Also Published As

Publication number Publication date
GB2175113A (en) 1986-11-19
GB8512538D0 (en) 1985-06-19

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970517