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GB2027242B - Alarm systems - Google Patents

Alarm systems

Info

Publication number
GB2027242B
GB2027242B GB7925314A GB7925314A GB2027242B GB 2027242 B GB2027242 B GB 2027242B GB 7925314 A GB7925314 A GB 7925314A GB 7925314 A GB7925314 A GB 7925314A GB 2027242 B GB2027242 B GB 2027242B
Authority
GB
United Kingdom
Prior art keywords
alarm systems
alarm
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
GB7925314A
Other versions
GB2027242A (en
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.)
NOTECALM Ltd
Original Assignee
NOTECALM Ltd
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 NOTECALM Ltd filed Critical NOTECALM Ltd
Priority to GB7925314A priority Critical patent/GB2027242B/en
Publication of GB2027242A publication Critical patent/GB2027242A/en
Application granted granted Critical
Publication of GB2027242B publication Critical patent/GB2027242B/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
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1672—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using sonic detecting means, e.g. a microphone operating in the audio frequency range

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Predetermined Time Intervals (AREA)
  • Burglar Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)
GB7925314A 1978-07-31 1979-07-20 Alarm systems Expired GB2027242B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7925314A GB2027242B (en) 1978-07-31 1979-07-20 Alarm systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7831688 1978-07-31
GB7925314A GB2027242B (en) 1978-07-31 1979-07-20 Alarm systems

Publications (2)

Publication Number Publication Date
GB2027242A GB2027242A (en) 1980-02-13
GB2027242B true GB2027242B (en) 1983-02-02

Family

ID=26268401

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7925314A Expired GB2027242B (en) 1978-07-31 1979-07-20 Alarm systems

Country Status (1)

Country Link
GB (1) GB2027242B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2201819B (en) * 1987-01-22 1991-05-29 Task Force International Limit Detection systems
GB2271873B (en) * 1992-09-03 1997-02-26 Josef Petr Prokopius Electronic burglar alarm system
JP3298318B2 (en) * 1994-07-18 2002-07-02 株式会社デンソー Glass break detector
CN108830821B (en) * 2018-02-08 2019-07-02 绍兴市寅源智能科技有限公司 Household damaged degree detection method based on image procossing

Also Published As

Publication number Publication date
GB2027242A (en) 1980-02-13

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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