GB2231430B - Improvements relating to security sensors - Google Patents
Improvements relating to security sensorsInfo
- Publication number
- GB2231430B GB2231430B GB9004569A GB9004569A GB2231430B GB 2231430 B GB2231430 B GB 2231430B GB 9004569 A GB9004569 A GB 9004569A GB 9004569 A GB9004569 A GB 9004569A GB 2231430 B GB2231430 B GB 2231430B
- 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.)
- Expired - Lifetime
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)
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 GB9004569D0 (en) | 1990-04-25 |
GB2231430A GB2231430A (en) | 1990-11-14 |
GB2231430B true 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) |
Citations (2)
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 |
-
1989
- 1989-03-04 GB GB898905013A patent/GB8905013D0/en active Pending
-
1990
- 1990-03-01 GB GB9004569A patent/GB2231430B/en not_active Expired - Lifetime
Patent Citations (2)
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 |
---|---|
GB9004569D0 (en) | 1990-04-25 |
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 |