GB2177797B - An environmental interference detection device - Google Patents

An environmental interference detection device

Info

Publication number
GB2177797B
GB2177797B GB8517670A GB8517670A GB2177797B GB 2177797 B GB2177797 B GB 2177797B GB 8517670 A GB8517670 A GB 8517670A GB 8517670 A GB8517670 A GB 8517670A GB 2177797 B GB2177797 B GB 2177797B
Authority
GB
United Kingdom
Prior art keywords
detection device
interference detection
environmental interference
environmental
interference
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
GB8517670A
Other versions
GB8517670D0 (en
GB2177797A (en
Inventor
Shih-Ming Hwang
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 GB8517670A priority Critical patent/GB2177797B/en
Publication of GB8517670D0 publication Critical patent/GB8517670D0/en
Publication of GB2177797A publication Critical patent/GB2177797A/en
Application granted granted Critical
Publication of GB2177797B publication Critical patent/GB2177797B/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
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/04—Mechanical actuation by breaking of glass

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
GB8517670A 1985-07-12 1985-07-12 An environmental interference detection device Expired GB2177797B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8517670A GB2177797B (en) 1985-07-12 1985-07-12 An environmental interference detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8517670A GB2177797B (en) 1985-07-12 1985-07-12 An environmental interference detection device

Publications (3)

Publication Number Publication Date
GB8517670D0 GB8517670D0 (en) 1985-08-21
GB2177797A GB2177797A (en) 1987-01-28
GB2177797B true GB2177797B (en) 1989-07-26

Family

ID=10582207

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8517670A Expired GB2177797B (en) 1985-07-12 1985-07-12 An environmental interference detection device

Country Status (1)

Country Link
GB (1) GB2177797B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1446925A (en) * 1972-09-15 1976-08-18 Kidde & Co Walter Method and apparatusfor adjusting sesitivity of an ultrasonic detection system
GB2137749A (en) * 1983-04-07 1984-10-10 Healey Meters Limited Intruder Detection System
GB2175425A (en) * 1985-05-17 1986-11-26 Gec Avionics Intruder alarm system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1446925A (en) * 1972-09-15 1976-08-18 Kidde & Co Walter Method and apparatusfor adjusting sesitivity of an ultrasonic detection system
GB2137749A (en) * 1983-04-07 1984-10-10 Healey Meters Limited Intruder Detection System
GB2175425A (en) * 1985-05-17 1986-11-26 Gec Avionics Intruder alarm system

Also Published As

Publication number Publication date
GB8517670D0 (en) 1985-08-21
GB2177797A (en) 1987-01-28

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Legal Events

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

Effective date: 20000712