FR2176499B1 - - Google Patents
Info
- Publication number
- FR2176499B1 FR2176499B1 FR7209800A FR7209800A FR2176499B1 FR 2176499 B1 FR2176499 B1 FR 2176499B1 FR 7209800 A FR7209800 A FR 7209800A FR 7209800 A FR7209800 A FR 7209800A FR 2176499 B1 FR2176499 B1 FR 2176499B1
- 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
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
- G01V3/101—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil
- G01V3/102—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil by measuring amplitude
-
- 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)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Burglar Alarm Systems (AREA)
- Transmitters (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7209800A FR2176499B1 (en) | 1972-03-21 | 1972-03-21 | |
GB1151673A GB1378280A (en) | 1972-03-21 | 1973-03-09 | Radio detector for detecting the movement of people or objects in a confined space |
DE2312484A DE2312484A1 (en) | 1972-03-21 | 1973-03-13 | RADIO DEVICE FOR SENSING THE MOVEMENT OF PERSONS OR OBJECTS IN A LIMITED SPACE |
US00341744A US3828335A (en) | 1972-03-21 | 1973-03-15 | Radio-wave detector for discovering the movement of persons or objects in a confined space |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7209800A FR2176499B1 (en) | 1972-03-21 | 1972-03-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2176499A1 FR2176499A1 (en) | 1973-11-02 |
FR2176499B1 true FR2176499B1 (en) | 1975-03-21 |
Family
ID=9095554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7209800A Expired FR2176499B1 (en) | 1972-03-21 | 1972-03-21 |
Country Status (4)
Country | Link |
---|---|
US (1) | US3828335A (en) |
DE (1) | DE2312484A1 (en) |
FR (1) | FR2176499B1 (en) |
GB (1) | GB1378280A (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1093655A (en) * | 1977-01-19 | 1981-01-13 | Martin T. Cole | Intrusion or movement detector |
US4325058A (en) * | 1980-06-11 | 1982-04-13 | Gentex Corporation | Pre-intrusion detection and alarm system |
US4380721A (en) * | 1980-12-29 | 1983-04-19 | Bullock John W | Proximity switch |
JPS60111983A (en) * | 1983-11-22 | 1985-06-18 | Honda Motor Co Ltd | Object detecting apparatus |
MY122034A (en) * | 1996-09-27 | 2006-03-31 | Inventio Ag | Identification system for an elevator installation |
JP3409752B2 (en) * | 1999-10-26 | 2003-05-26 | トヨタ自動車株式会社 | Moving object detection device, abnormality alarm device and loading room opening control device |
GB2455540A (en) * | 2007-12-13 | 2009-06-17 | Philip Hodgetts | Proximity sensing system to control electricity supply |
CA2718901C (en) * | 2008-03-17 | 2018-10-16 | Powermat Ltd. | Inductive transmission system |
US8981598B2 (en) | 2008-07-02 | 2015-03-17 | Powermat Technologies Ltd. | Energy efficient inductive power transmission system and method |
US11979201B2 (en) | 2008-07-02 | 2024-05-07 | Powermat Technologies Ltd. | System and method for coded communication signals regulating inductive power transmissions |
ES2534702B1 (en) * | 2013-09-24 | 2016-02-09 | Ontech Security, Sl | ELECTROSTATIC FIELD SENSOR AND SECURITY SYSTEM IN INTERIOR SPACES |
US10511347B2 (en) * | 2017-11-14 | 2019-12-17 | Nxp B.V. | Device detection in contactless communication systems |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2152296A (en) * | 1936-09-21 | 1939-03-28 | Talking Advertising Corp | Advertising device |
DE970232C (en) * | 1937-05-01 | 1958-08-28 | Emi Ltd | Arrangement for coupling a high frequency source to a consumer |
US3005191A (en) * | 1957-07-10 | 1961-10-17 | Mosler Res Products Inc | Security alarm system |
US2992420A (en) * | 1957-11-08 | 1961-07-11 | Holmes Electric Protective Com | Capacity type burglar alarm systems |
US3324647A (en) * | 1964-08-11 | 1967-06-13 | Parmet Company | Proximity detector |
DE1566723A1 (en) * | 1967-04-13 | 1970-08-06 | Johannes Rode | Room surveillance system |
US3573783A (en) * | 1967-09-13 | 1971-04-06 | R F Controls Inc | Proximity sensor |
US3495353A (en) * | 1968-09-23 | 1970-02-17 | Stanley Works | Door operating mechanism |
-
1972
- 1972-03-21 FR FR7209800A patent/FR2176499B1/fr not_active Expired
-
1973
- 1973-03-09 GB GB1151673A patent/GB1378280A/en not_active Expired
- 1973-03-13 DE DE2312484A patent/DE2312484A1/en active Pending
- 1973-03-15 US US00341744A patent/US3828335A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE2312484A1 (en) | 1973-10-04 |
US3828335A (en) | 1974-08-06 |
GB1378280A (en) | 1974-12-27 |
FR2176499A1 (en) | 1973-11-02 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |