GB2175722B - Security systems - Google Patents

Security systems

Info

Publication number
GB2175722B
GB2175722B GB8611528A GB8611528A GB2175722B GB 2175722 B GB2175722 B GB 2175722B GB 8611528 A GB8611528 A GB 8611528A GB 8611528 A GB8611528 A GB 8611528A GB 2175722 B GB2175722 B GB 2175722B
Authority
GB
United Kingdom
Prior art keywords
security systems
security
systems
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
GB8611528A
Other versions
GB2175722A (en
GB8611528D0 (en
Inventor
Roy Want
Anthony Hungerford Hoskyns
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.)
LONDON NEW TECHNOLOGY NETWORK
Original Assignee
LONDON NEW TECHNOLOGY NETWORK
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 LONDON NEW TECHNOLOGY NETWORK filed Critical LONDON NEW TECHNOLOGY NETWORK
Publication of GB8611528D0 publication Critical patent/GB8611528D0/en
Publication of GB2175722A publication Critical patent/GB2175722A/en
Application granted granted Critical
Publication of GB2175722B publication Critical patent/GB2175722B/en
Expired legal-status Critical Current

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
    • G08B25/06—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 power transmission lines

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
GB8611528A 1985-05-20 1986-05-12 Security systems Expired GB2175722B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB858512655A GB8512655D0 (en) 1985-05-20 1985-05-20 Security systems

Publications (3)

Publication Number Publication Date
GB8611528D0 GB8611528D0 (en) 1986-06-18
GB2175722A GB2175722A (en) 1986-12-03
GB2175722B true GB2175722B (en) 1989-07-05

Family

ID=10579380

Family Applications (2)

Application Number Title Priority Date Filing Date
GB858512655A Pending GB8512655D0 (en) 1985-05-20 1985-05-20 Security systems
GB8611528A Expired GB2175722B (en) 1985-05-20 1986-05-12 Security systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB858512655A Pending GB8512655D0 (en) 1985-05-20 1985-05-20 Security systems

Country Status (1)

Country Link
GB (2) GB8512655D0 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2348553A (en) * 1999-03-23 2000-10-04 John Edward Cunningham Network monitoring system
GB2362248A (en) * 2000-05-13 2001-11-14 Ibm Power socket for physical asset tracking

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1390913A (en) * 1971-05-24 1975-04-16 Microwave & Electronic Syst Monitoring systems
GB1428652A (en) * 1972-02-11 1976-03-17 Plessey Co Ltd Alarm systems
GB2067321A (en) * 1980-01-08 1981-07-22 Raveningham Elect Res Monitoring apparatus
US4290056A (en) * 1979-07-05 1981-09-15 Ellsworth, Chow & Murphy, Inc. Protective system
GB2119981A (en) * 1982-01-07 1983-11-23 Morrison John M Alarm Systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1390913A (en) * 1971-05-24 1975-04-16 Microwave & Electronic Syst Monitoring systems
GB1428652A (en) * 1972-02-11 1976-03-17 Plessey Co Ltd Alarm systems
US4290056A (en) * 1979-07-05 1981-09-15 Ellsworth, Chow & Murphy, Inc. Protective system
GB2067321A (en) * 1980-01-08 1981-07-22 Raveningham Elect Res Monitoring apparatus
GB2119981A (en) * 1982-01-07 1983-11-23 Morrison John M Alarm Systems

Also Published As

Publication number Publication date
GB2175722A (en) 1986-12-03
GB8512655D0 (en) 1985-06-26
GB8611528D0 (en) 1986-06-18

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930512