FR2182574A5 - - Google Patents
Info
- Publication number
- FR2182574A5 FR2182574A5 FR7315784A FR7315784A FR2182574A5 FR 2182574 A5 FR2182574 A5 FR 2182574A5 FR 7315784 A FR7315784 A FR 7315784A FR 7315784 A FR7315784 A FR 7315784A FR 2182574 A5 FR2182574 A5 FR 2182574A5
- 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
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
- G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Burglar Alarm Systems (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00248337A US3805064A (en) | 1972-04-27 | 1972-04-27 | Radiation sensitive intrusion detection system |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2182574A5 true FR2182574A5 (US06229276-20010508-P00022.png) | 1973-12-07 |
Family
ID=22938677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7315784A Expired FR2182574A5 (US06229276-20010508-P00022.png) | 1972-04-27 | 1973-04-25 |
Country Status (13)
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2818942C2 (de) * | 1978-04-28 | 1986-03-27 | Zellweger Uster Ag, Uster | Verfahren zur Raumüberwachung und Vorrichtung zur Durchführung des Verfahrens |
US4239961A (en) * | 1979-01-23 | 1980-12-16 | Theodore Lasar | Photoelectric light curtain using retroreflector |
US4294543A (en) * | 1979-11-13 | 1981-10-13 | Command Control & Communications Corporation | Optical system for developing point coordinate information |
USRE33668E (en) * | 1981-02-10 | 1991-08-20 | Otis Elevator Company | Detection device having energy transmitters located at vertically spaced apart points along movable doors |
US4794248A (en) * | 1985-07-16 | 1988-12-27 | Otis Elevator Company | Detection device having energy transmitters located at vertically spaced apart points along movable doors |
DE3152800A1 (de) * | 1981-07-16 | 1983-08-25 | Fa. Aug. Winkhaus, 4404 Telgte | Alarmmelder zur sicherung eines durchgangs oder durchgangsabschnitts |
DE3128073C2 (de) * | 1981-07-16 | 1984-01-26 | Fa. Aug. Winkhaus, 4404 Telgte | Alarmmelder zur Sicherung eines Durchgangs oder eines Durchgangsabschnitts |
US4893005A (en) * | 1986-04-11 | 1990-01-09 | Development/Consulting Associates | Method and apparatus for area and perimeter security with reflection counting |
US5567931A (en) * | 1994-10-25 | 1996-10-22 | Otis Elevator Company | Variable beam detection using a dynamic detection threshold |
CA2158902A1 (en) * | 1994-10-25 | 1996-04-26 | Brian J. Amend | Weak beam detection |
US7295831B2 (en) * | 2003-08-12 | 2007-11-13 | 3E Technologies International, Inc. | Method and system for wireless intrusion detection prevention and security management |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2419459A (en) * | 1944-02-01 | 1947-04-22 | Gen Electric | Photoelectric detecting apparatus |
US2769374A (en) * | 1951-10-19 | 1956-11-06 | Sick Erwin | Electrical light screen |
US3235738A (en) * | 1962-05-14 | 1966-02-15 | Sensi Tronics Inc | Photoelectric apparatus for detecting objects in an area |
US3335285A (en) * | 1964-03-24 | 1967-08-08 | Jr John Gally | Photoelectric system for detecting objects in a zone including vibrating light source |
US3336585A (en) * | 1965-04-05 | 1967-08-15 | Stanford Research Inst | Electronic motion detector |
US3545572A (en) * | 1967-08-18 | 1970-12-08 | Montgomery Elevator Co | Elevator door control |
-
1972
- 1972-04-27 US US00248337A patent/US3805064A/en not_active Expired - Lifetime
-
1973
- 1973-03-13 ZA ZA731749A patent/ZA731749B/xx unknown
- 1973-03-14 GB GB1234873A patent/GB1413414A/en not_active Expired
- 1973-03-23 SE SE7304155A patent/SE385055B/xx unknown
- 1973-04-09 AU AU54275/73A patent/AU475279B2/en not_active Expired
- 1973-04-18 BE BE130175A patent/BE798412A/xx unknown
- 1973-04-19 DE DE2320070A patent/DE2320070A1/de active Pending
- 1973-04-24 IT IT49635/73A patent/IT980335B/it active
- 1973-04-25 FR FR7315784A patent/FR2182574A5/fr not_active Expired
- 1973-04-25 JP JP48046313A patent/JPS4948298A/ja active Pending
- 1973-04-26 NL NL7305814A patent/NL7305814A/xx unknown
- 1973-04-26 CA CA169,970A patent/CA1008942A/en not_active Expired
- 1973-04-27 ES ES414140A patent/ES414140A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
SE385055B (sv) | 1976-05-31 |
ES414140A1 (es) | 1976-02-01 |
AU5427573A (en) | 1974-10-10 |
NL7305814A (US06229276-20010508-P00022.png) | 1973-10-30 |
CA1008942A (en) | 1977-04-19 |
US3805064A (en) | 1974-04-16 |
AU475279B2 (en) | 1976-08-19 |
ZA731749B (en) | 1973-12-19 |
DE2320070A1 (de) | 1973-11-08 |
GB1413414A (en) | 1975-11-12 |
BE798412A (fr) | 1973-08-16 |
IT980335B (it) | 1974-09-30 |
JPS4948298A (US06229276-20010508-P00022.png) | 1974-05-10 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |