GB9004569D0 - Improvements relating to security sensors - Google Patents

Improvements relating to security sensors

Info

Publication number
GB9004569D0
GB9004569D0 GB909004569A GB9004569A GB9004569D0 GB 9004569 D0 GB9004569 D0 GB 9004569D0 GB 909004569 A GB909004569 A GB 909004569A GB 9004569 A GB9004569 A GB 9004569A GB 9004569 D0 GB9004569 D0 GB 9004569D0
Authority
GB
United Kingdom
Prior art keywords
improvements relating
security sensors
security
sensors
relating
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.)
Granted
Application number
GB909004569A
Other versions
GB2231430B (en
GB2231430A (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.)
Weyrad Electronics Ltd
Original Assignee
Weyrad Electronics 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 Weyrad Electronics Ltd filed Critical Weyrad Electronics Ltd
Publication of GB9004569D0 publication Critical patent/GB9004569D0/en
Publication of GB2231430A publication Critical patent/GB2231430A/en
Application granted granted Critical
Publication of GB2231430B publication Critical patent/GB2231430B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G08B13/02—Mechanical actuation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
GB9004569A 1989-03-04 1990-03-01 Improvements relating to security sensors Expired - Lifetime GB2231430B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB898905013A GB8905013D0 (en) 1989-03-04 1989-03-04 Improvements relating to vibration sensors

Publications (3)

Publication Number Publication Date
GB9004569D0 true GB9004569D0 (en) 1990-04-25
GB2231430A GB2231430A (en) 1990-11-14
GB2231430B GB2231430B (en) 1992-05-20

Family

ID=10652771

Family Applications (2)

Application Number Title Priority Date Filing Date
GB898905013A Pending GB8905013D0 (en) 1989-03-04 1989-03-04 Improvements relating to vibration sensors
GB9004569A Expired - Lifetime GB2231430B (en) 1989-03-04 1990-03-01 Improvements relating to security sensors

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB898905013A Pending GB8905013D0 (en) 1989-03-04 1989-03-04 Improvements relating to vibration sensors

Country Status (1)

Country Link
GB (2) GB8905013D0 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3706090A (en) * 1970-10-12 1972-12-12 James I Callaghan Burglar alarm triggered by breaking of a magnetic circuit
US4559528A (en) * 1983-07-14 1985-12-17 Don E. Berger Ornamental vibration sensor device for burglar alarm system

Also Published As

Publication number Publication date
GB2231430B (en) 1992-05-20
GB2231430A (en) 1990-11-14
GB8905013D0 (en) 1989-04-19

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20100228