FR2357014B1 - - Google Patents
Info
- Publication number
- FR2357014B1 FR2357014B1 FR7620411A FR7620411A FR2357014B1 FR 2357014 B1 FR2357014 B1 FR 2357014B1 FR 7620411 A FR7620411 A FR 7620411A FR 7620411 A FR7620411 A FR 7620411A FR 2357014 B1 FR2357014 B1 FR 2357014B1
- 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
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- 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
- G08B13/2497—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field using transmission lines, e.g. cable
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Burglar Alarm Systems (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7620411A FR2357014A1 (en) | 1976-06-30 | 1976-06-30 | Electronic intrusion detector sensing people or objects - has two wire line connected with oscillator and phase changer to resonate with frequency varied by intrusion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7620411A FR2357014A1 (en) | 1976-06-30 | 1976-06-30 | Electronic intrusion detector sensing people or objects - has two wire line connected with oscillator and phase changer to resonate with frequency varied by intrusion |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2357014A1 FR2357014A1 (en) | 1978-01-27 |
FR2357014B1 true FR2357014B1 (en) | 1978-12-15 |
Family
ID=9175218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7620411A Granted FR2357014A1 (en) | 1976-06-30 | 1976-06-30 | Electronic intrusion detector sensing people or objects - has two wire line connected with oscillator and phase changer to resonate with frequency varied by intrusion |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2357014A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2461990A1 (en) * | 1979-07-16 | 1981-02-06 | Snecma | ELECTRONIC DEVICE FOR DETECTING INTRUSIONS IN AN ENVIRONMENT |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE738032C (en) * | 1937-05-05 | 1943-07-31 | Telefunken Gmbh | Antenna with advancing waves |
FR890321A (en) * | 1942-02-06 | 1944-02-04 | Telefunken Gmbh | Diamond antenna |
FR938181A (en) * | 1944-01-05 | 1948-09-07 | Int Standard Electric Corp | Combination of an oscillation generator and a radio antenna |
FR1180126A (en) * | 1957-07-26 | 1959-06-02 | Trt Telecom Radio Electr | Improvements to devices for monitoring road traffic |
US3031643A (en) * | 1960-05-16 | 1962-04-24 | Nat Company Inc | Transmission line fence burglar alarm |
US3375511A (en) * | 1965-06-24 | 1968-03-26 | Sylvania Electric Prod | Transmission line intruder detection system |
US3384887A (en) * | 1965-09-03 | 1968-05-21 | Sylvania Electric Prod | Intruder detection system |
US3818430A (en) * | 1973-04-30 | 1974-06-18 | United Aircraft Corp | Traffic detector using balun transformer phase detector |
-
1976
- 1976-06-30 FR FR7620411A patent/FR2357014A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2357014A1 (en) | 1978-01-27 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property | ||
ST | Notification of lapse |