GB2317486B - Intrusion sensing systems - Google Patents
Intrusion sensing systemsInfo
- Publication number
- GB2317486B GB2317486B GB9726884A GB9726884A GB2317486B GB 2317486 B GB2317486 B GB 2317486B GB 9726884 A GB9726884 A GB 9726884A GB 9726884 A GB9726884 A GB 9726884A GB 2317486 B GB2317486 B GB 2317486B
- Authority
- GB
- United Kingdom
- Prior art keywords
- sensing systems
- intrusion sensing
- intrusion
- systems
- sensing
- 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.)
- Revoked
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9726884A GB2317486B (en) | 1995-06-22 | 1996-06-24 | Intrusion sensing systems |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9512753.6A GB9512753D0 (en) | 1995-06-22 | 1995-06-22 | Intrusion sensing system |
PCT/GB1996/001517 WO1997001160A1 (en) | 1995-06-22 | 1996-06-24 | Intrusion sensing systems |
GB9726884A GB2317486B (en) | 1995-06-22 | 1996-06-24 | Intrusion sensing systems |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9726884D0 GB9726884D0 (en) | 1998-02-18 |
GB2317486A GB2317486A (en) | 1998-03-25 |
GB2317486B true GB2317486B (en) | 2000-01-12 |
Family
ID=26307269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9726884A Revoked GB2317486B (en) | 1995-06-22 | 1996-06-24 | Intrusion sensing systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2317486B (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3789384A (en) * | 1972-12-29 | 1974-01-29 | Lawrence Security Inc | Security system operated by changes in light at specified locations |
US4079361A (en) * | 1974-01-23 | 1978-03-14 | Microwave And Electronic Systems Limited | Intrusion sensor and aerial therefor |
GB1548771A (en) * | 1976-11-05 | 1979-07-18 | Spirig Ernst | Intruder alarm systems |
US4590460A (en) * | 1984-10-03 | 1986-05-20 | Abbott Ralph E | Stairwell security system |
EP0198551A2 (en) * | 1985-04-15 | 1986-10-22 | Philips Electronics Uk Limited | Infra-red intruder detection system |
EP0337964A1 (en) * | 1988-04-13 | 1989-10-18 | ELKRON S.p.A. | A combined microwave and infra-red detector device, particularly for anti-intrusion systems |
EP0499177A1 (en) * | 1991-02-11 | 1992-08-19 | BITRON VIDEO S.r.l. | Anti-intrusion device |
US5276427A (en) * | 1991-07-08 | 1994-01-04 | Digital Security Controls Ltd. | Auto-adjust motion detection system |
-
1996
- 1996-06-24 GB GB9726884A patent/GB2317486B/en not_active Revoked
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3789384A (en) * | 1972-12-29 | 1974-01-29 | Lawrence Security Inc | Security system operated by changes in light at specified locations |
US4079361A (en) * | 1974-01-23 | 1978-03-14 | Microwave And Electronic Systems Limited | Intrusion sensor and aerial therefor |
GB1548771A (en) * | 1976-11-05 | 1979-07-18 | Spirig Ernst | Intruder alarm systems |
US4590460A (en) * | 1984-10-03 | 1986-05-20 | Abbott Ralph E | Stairwell security system |
EP0198551A2 (en) * | 1985-04-15 | 1986-10-22 | Philips Electronics Uk Limited | Infra-red intruder detection system |
EP0337964A1 (en) * | 1988-04-13 | 1989-10-18 | ELKRON S.p.A. | A combined microwave and infra-red detector device, particularly for anti-intrusion systems |
EP0499177A1 (en) * | 1991-02-11 | 1992-08-19 | BITRON VIDEO S.r.l. | Anti-intrusion device |
US5276427A (en) * | 1991-07-08 | 1994-01-04 | Digital Security Controls Ltd. | Auto-adjust motion detection system |
Non-Patent Citations (2)
Title |
---|
PROCS 1986 INT CARNAHAN CONF ON SECURITY TECH: ELEC CRIME COUNTERMEASURES,12-14 AUG 1986,pp 119-124 * |
PROCS 1993 INT CARNAHAN CONF ON SECURITY TECHNOLOGY, 13 OCTOBER 1993, pp 251-253 * |
Also Published As
Publication number | Publication date |
---|---|
GB9726884D0 (en) | 1998-02-18 |
GB2317486A (en) | 1998-03-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
773K | Patent revoked under sect. 73(2)/1977 |
Free format text: PATENT REVOKED ON 20040914 |