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GB2174194B - Monitoring device and method - Google Patents

Monitoring device and method

Info

Publication number
GB2174194B
GB2174194B GB08507973A GB8507973A GB2174194B GB 2174194 B GB2174194 B GB 2174194B GB 08507973 A GB08507973 A GB 08507973A GB 8507973 A GB8507973 A GB 8507973A GB 2174194 B GB2174194 B GB 2174194B
Authority
GB
United Kingdom
Prior art keywords
monitoring device
monitoring
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
GB08507973A
Other versions
GB2174194A (en
Inventor
Nigel Howard Walton
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 GB08507973A priority Critical patent/GB2174194B/en
Publication of GB2174194A publication Critical patent/GB2174194A/en
Application granted granted Critical
Publication of GB2174194B publication Critical patent/GB2174194B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
    • G08B13/184—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using radiation reflectors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
GB08507973A 1985-03-27 1985-03-27 Monitoring device and method Expired GB2174194B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08507973A GB2174194B (en) 1985-03-27 1985-03-27 Monitoring device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08507973A GB2174194B (en) 1985-03-27 1985-03-27 Monitoring device and method

Publications (2)

Publication Number Publication Date
GB2174194A GB2174194A (en) 1986-10-29
GB2174194B true GB2174194B (en) 1989-02-01

Family

ID=10576736

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08507973A Expired GB2174194B (en) 1985-03-27 1985-03-27 Monitoring device and method

Country Status (1)

Country Link
GB (1) GB2174194B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2217441A (en) * 1987-12-15 1989-10-25 Plessey Co Plc Alarm system for enclosures
US7307515B1 (en) * 2005-06-22 2007-12-11 Schake Michael L Trailer security system using multiple transmitter/receiver pairs
EP2159602B1 (en) 2008-08-28 2013-08-28 Sick Ag Monitoring of an area
US9824559B2 (en) * 2016-04-07 2017-11-21 Tyco Fire & Security Gmbh Security sensing method and apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB894146A (en) * 1959-11-05 1962-04-18 Haviland Aircraft Company Ltd Improved alarm system
GB1320002A (en) * 1970-06-27 1973-06-13 Pilkington Perkin Elmer Ltd Detector systems
US3898639A (en) * 1972-08-24 1975-08-05 Hrand M Muncheryan Security surveillance laser system
US3987428A (en) * 1975-06-16 1976-10-19 The Raymond Lee Organization, Inc. Optical laser security system
IT1200370B (en) * 1981-03-25 1989-01-18 Goldstein Pinchas PASSIVE FINISHING OPTICAL PROTECTION EQUIPMENT AND STABILIZED REFLECTOR COMPLEX USED IN IT

Also Published As

Publication number Publication date
GB2174194A (en) 1986-10-29

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Legal Events

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

Effective date: 19950327