GB2233486B - Alarm systems - Google Patents

Alarm systems

Info

Publication number
GB2233486B
GB2233486B GB8914311A GB8914311A GB2233486B GB 2233486 B GB2233486 B GB 2233486B GB 8914311 A GB8914311 A GB 8914311A GB 8914311 A GB8914311 A GB 8914311A GB 2233486 B GB2233486 B GB 2233486B
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 - Fee Related
Application number
GB8914311A
Other versions
GB2233486A (en
GB8914311D0 (en
Inventor
Martin George Bone
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.)
DIGITAL AUDIO Ltd
Original Assignee
DIGITAL AUDIO 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 DIGITAL AUDIO Ltd filed Critical DIGITAL AUDIO Ltd
Priority to GB8914311A priority Critical patent/GB2233486B/en
Publication of GB8914311D0 publication Critical patent/GB8914311D0/en
Publication of GB2233486A publication Critical patent/GB2233486A/en
Application granted granted Critical
Publication of GB2233486B publication Critical patent/GB2233486B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/046—Monitoring of the detection circuits prevention of tampering with detection circuits
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
    • G08B29/08—Signalling of tampering with the line circuit
GB8914311A 1989-06-22 1989-06-22 Alarm systems Expired - Fee Related GB2233486B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8914311A GB2233486B (en) 1989-06-22 1989-06-22 Alarm systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8914311A GB2233486B (en) 1989-06-22 1989-06-22 Alarm systems

Publications (3)

Publication Number Publication Date
GB8914311D0 GB8914311D0 (en) 1989-08-09
GB2233486A GB2233486A (en) 1991-01-09
GB2233486B true GB2233486B (en) 1993-03-24

Family

ID=10658855

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8914311A Expired - Fee Related GB2233486B (en) 1989-06-22 1989-06-22 Alarm systems

Country Status (1)

Country Link
GB (1) GB2233486B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7004784B2 (en) 2004-02-26 2006-02-28 Robert Bosch Gmbh Tamper detection for security system
ITUA20162874A1 (en) * 2016-04-26 2017-10-26 Coges S P A AN ANTI-THEFT AND ANTI-TROUBLE PROTECTION SYSTEM

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1265022A (en) * 1969-03-26 1972-03-01

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1265022A (en) * 1969-03-26 1972-03-01

Also Published As

Publication number Publication date
GB2233486A (en) 1991-01-09
GB8914311D0 (en) 1989-08-09

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Legal Events

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

Effective date: 19940622