FR2450464B1 - - Google Patents
Info
- Publication number
- FR2450464B1 FR2450464B1 FR7905531A FR7905531A FR2450464B1 FR 2450464 B1 FR2450464 B1 FR 2450464B1 FR 7905531 A FR7905531 A FR 7905531A FR 7905531 A FR7905531 A FR 7905531A FR 2450464 B1 FR2450464 B1 FR 2450464B1
- Authority
- FR
- France
- 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
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
- G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7905531A FR2450464A1 (fr) | 1979-03-02 | 1979-03-02 | Detecteur de proximite pour la realisation de dispositifs de protection des lieux et des biens contre les intrusions, et de dispositifs de comptage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7905531A FR2450464A1 (fr) | 1979-03-02 | 1979-03-02 | Detecteur de proximite pour la realisation de dispositifs de protection des lieux et des biens contre les intrusions, et de dispositifs de comptage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2450464A1 FR2450464A1 (fr) | 1980-09-26 |
| FR2450464B1 true FR2450464B1 (US08124317-20120228-C00060.png) | 1983-12-23 |
Family
ID=9222714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7905531A Granted FR2450464A1 (fr) | 1979-03-02 | 1979-03-02 | Detecteur de proximite pour la realisation de dispositifs de protection des lieux et des biens contre les intrusions, et de dispositifs de comptage |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2450464A1 (US08124317-20120228-C00060.png) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2205950A (en) * | 1987-04-24 | 1988-12-21 | Coleman Electronic Designs Ltd | Capacitive proximity sensor |
| FR2615987B1 (fr) * | 1987-05-27 | 1994-04-01 | Axytel | Dispositif de controle de l'integrite d'une paroi quelconque, metallique ou non, destine a declencher automatiquement une intervention en cas d'agression commise a l'encontre de cette paroi |
| DE4121110C1 (US08124317-20120228-C00060.png) * | 1991-06-26 | 1992-11-05 | Siemens Ag, 8000 Muenchen, De |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1128791B (de) * | 1960-07-01 | 1962-04-26 | Telefonbau | Vorrichtung zur Sicherung von Gegenstaenden, z. B. in Ausstellungen |
| GB940415A (en) * | 1962-05-10 | 1963-10-30 | Standard Telephones Cables Ltd | Intruder detection system |
| US3896425A (en) * | 1973-10-16 | 1975-07-22 | Tyco Laboratories Inc | Proximity detector |
-
1979
- 1979-03-02 FR FR7905531A patent/FR2450464A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2450464A1 (fr) | 1980-09-26 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |