BE815140A - Dispositif detecteur d'objets - Google Patents
Dispositif detecteur d'objetsInfo
- Publication number
- BE815140A BE815140A BE144409A BE144409A BE815140A BE 815140 A BE815140 A BE 815140A BE 144409 A BE144409 A BE 144409A BE 144409 A BE144409 A BE 144409A BE 815140 A BE815140 A BE 815140A
- Authority
- BE
- Belgium
- Prior art keywords
- detector device
- object detector
- detector
- Prior art date
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00362113A US3825745A (en) | 1973-05-21 | 1973-05-21 | Object detecting system |
Publications (1)
Publication Number | Publication Date |
---|---|
BE815140A true BE815140A (fr) | 1974-09-16 |
Family
ID=23424753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE144409A BE815140A (fr) | 1973-05-21 | 1974-05-16 | Dispositif detecteur d'objets |
Country Status (5)
Country | Link |
---|---|
US (1) | US3825745A (xx) |
BE (1) | BE815140A (xx) |
DE (1) | DE2424695A1 (xx) |
FR (1) | FR2231019B1 (xx) |
GB (1) | GB1437863A (xx) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3925681A (en) * | 1973-03-13 | 1975-12-09 | Grudelbach Hans Dieter | Monitoring, counting and safety apparatus |
US4063085A (en) * | 1975-11-03 | 1977-12-13 | Cometa S. A. | Method of and apparatus for electronic scanning |
DE2648631C2 (de) * | 1976-10-27 | 1986-07-10 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Lichtelektrische Schranke mit Paaren von lichtelektrischen Sendern und Empfängern |
US4266124A (en) * | 1979-08-10 | 1981-05-05 | Data Instruments, Inc. | Photoelectric object detector system |
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 |
US4408195A (en) * | 1981-08-17 | 1983-10-04 | Fmc Corporation | Boundary plane warning system |
GB2147441A (en) * | 1983-09-16 | 1985-05-09 | Frank James Tough | Intruder alarm systems |
US4650990A (en) * | 1984-08-16 | 1987-03-17 | Joensson Nils | Processor-controlled light screen wherein light beam carries coded signals |
KR900005225B1 (ko) * | 1985-07-09 | 1990-07-21 | 알프스덴기 가부시기 가이샤 | 광학식 좌표입력장치 |
GB2227309A (en) * | 1989-01-18 | 1990-07-25 | Formula Systems Ltd | Detection system |
US6050369A (en) * | 1994-10-07 | 2000-04-18 | Toc Holding Company Of New York, Inc. | Elevator shaftway intrusion device using optical imaging processing |
CA2158902A1 (en) * | 1994-10-25 | 1996-04-26 | Brian J. Amend | Weak beam detection |
US5567931A (en) * | 1994-10-25 | 1996-10-22 | Otis Elevator Company | Variable beam detection using a dynamic detection threshold |
US5644111A (en) * | 1995-05-08 | 1997-07-01 | New York City Housing Authority | Elevator hatch door monitoring system |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3746863A (en) * | 1972-03-15 | 1973-07-17 | Exotron Ind Ltd | Light curtain control for a switch |
-
1973
- 1973-05-21 US US00362113A patent/US3825745A/en not_active Expired - Lifetime
-
1974
- 1974-04-26 GB GB1837574A patent/GB1437863A/en not_active Expired
- 1974-05-15 FR FR7416919A patent/FR2231019B1/fr not_active Expired
- 1974-05-16 BE BE144409A patent/BE815140A/xx unknown
- 1974-05-21 DE DE2424695A patent/DE2424695A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2424695A1 (de) | 1974-12-05 |
FR2231019B1 (xx) | 1976-06-25 |
GB1437863A (en) | 1976-06-03 |
FR2231019A1 (xx) | 1974-12-20 |
US3825745A (en) | 1974-07-23 |
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