GB2282449B - An improved audio intrusion detection system - Google Patents

An improved audio intrusion detection system

Info

Publication number
GB2282449B
GB2282449B GB9425433A GB9425433A GB2282449B GB 2282449 B GB2282449 B GB 2282449B GB 9425433 A GB9425433 A GB 9425433A GB 9425433 A GB9425433 A GB 9425433A GB 2282449 B GB2282449 B GB 2282449B
Authority
GB
United Kingdom
Prior art keywords
detection system
intrusion detection
improved audio
audio intrusion
improved
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 - Lifetime
Application number
GB9425433A
Other versions
GB2282449A (en
GB9425433D0 (en
Inventor
Stephen A Rickman
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.)
C&K Systems Inc
Original Assignee
C&K Systems Inc
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
Priority claimed from US07/694,824 external-priority patent/US5164703A/en
Application filed by C&K Systems Inc filed Critical C&K Systems Inc
Publication of GB9425433D0 publication Critical patent/GB9425433D0/en
Publication of GB2282449A publication Critical patent/GB2282449A/en
Application granted granted Critical
Publication of GB2282449B publication Critical patent/GB2282449B/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
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
GB9425433A 1991-05-02 1992-05-01 An improved audio intrusion detection system Expired - Lifetime GB2282449B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/694,824 US5164703A (en) 1991-05-02 1991-05-02 Audio intrusion detection system
GB9209533A GB2255409B (en) 1991-05-02 1992-05-01 An improved audio intrusion detection system

Publications (3)

Publication Number Publication Date
GB9425433D0 GB9425433D0 (en) 1995-02-15
GB2282449A GB2282449A (en) 1995-04-05
GB2282449B true GB2282449B (en) 1995-07-19

Family

ID=26300813

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9425433A Expired - Lifetime GB2282449B (en) 1991-05-02 1992-05-01 An improved audio intrusion detection system

Country Status (1)

Country Link
GB (1) GB2282449B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19530729A1 (en) * 1995-08-18 1997-02-20 Kiekert Ag Monitoring inner space of motor vehicle
CN113763657B (en) * 2020-06-04 2023-04-21 浙江宇视科技有限公司 Monitoring alarm device, monitoring alarm control method and monitoring system

Also Published As

Publication number Publication date
GB2282449A (en) 1995-04-05
GB9425433D0 (en) 1995-02-15

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20120430