FR2379825B1 - - Google Patents
Info
- Publication number
- FR2379825B1 FR2379825B1 FR7802857A FR7802857A FR2379825B1 FR 2379825 B1 FR2379825 B1 FR 2379825B1 FR 7802857 A FR7802857 A FR 7802857A FR 7802857 A FR7802857 A FR 7802857A FR 2379825 B1 FR2379825 B1 FR 2379825B1
- 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
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Light Receiving Elements (AREA)
- Electronic Switches (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772704565 DE2704565A1 (de) | 1977-02-03 | 1977-02-03 | Photoelektronisches geraet |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2379825A1 FR2379825A1 (fr) | 1978-09-01 |
FR2379825B1 true FR2379825B1 (fr) | 1983-05-27 |
Family
ID=6000301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7802857A Granted FR2379825A1 (fr) | 1977-02-03 | 1978-02-02 | Appareil photo-electronique a transducteur d'utilisation et transducteur auxiliaire, notamment pour barrieres de securite |
Country Status (8)
Country | Link |
---|---|
US (1) | US4388528A (fr) |
JP (1) | JPS5397479A (fr) |
CA (1) | CA1134474A (fr) |
CH (1) | CH624482A5 (fr) |
DE (1) | DE2704565A1 (fr) |
FR (1) | FR2379825A1 (fr) |
IT (1) | IT1092377B (fr) |
SE (1) | SE7801247L (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4734576A (en) * | 1986-05-01 | 1988-03-29 | Tektronix, Inc. | Electro-optic sampler |
US4939358A (en) * | 1986-10-08 | 1990-07-03 | Jeffries, Inc. | Switch apparatus including a pair of beam-type switches |
USRE37777E1 (en) * | 1986-10-08 | 2002-07-02 | Jeffrey G. Herman | Switch apparatus requiring the hand of the operator to activate the switch by breaking a light beam |
US4859054A (en) * | 1987-07-10 | 1989-08-22 | The United States Of America As Represented By The United States Department Of Energy | Proximity fuze |
DE3808260C1 (en) * | 1988-03-12 | 1989-03-16 | Fred 6991 Igersheim De Henneberg | Screen device |
US5117118A (en) * | 1988-10-19 | 1992-05-26 | Astex Co., Ltd. | Photoelectric switch using an integrated circuit with reduced interconnections |
US5077467A (en) * | 1990-09-12 | 1991-12-31 | Triad Controls, Inc. | Photoelectric switch and relay system with disabling fail-safe monitoring circuitry |
US5367158A (en) * | 1991-10-25 | 1994-11-22 | Break-A-Beam, Inc. | Photoelectric switch for use with a machine control circuit |
DE4214920A1 (de) * | 1992-05-11 | 1993-11-18 | Thomson Brandt Gmbh | Verfahren und Vorrichtung zur Sensorsignal-Aufbereitung |
DE4219270A1 (de) * | 1992-06-14 | 1993-12-16 | Gerhard Woerner | Vorrichtung zum Umschalten eines Mehrwegeventils |
EP3261131B1 (fr) * | 2016-06-21 | 2022-06-22 | Nokia Technologies Oy | Appareil de détection de rayonnement électromagnétique |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE899868C (de) * | 1943-05-20 | 1953-12-17 | Tobis Tonbild Syndikat G M B H | Photometer |
US3028499A (en) * | 1959-11-02 | 1962-04-03 | Gen Electric | Expanded scale photoelectric device |
US3311748A (en) * | 1963-12-20 | 1967-03-28 | Frank A Volpe | Sun tracker with rotatable planeparallel plate and two photocells |
US3521962A (en) * | 1964-06-19 | 1970-07-28 | Stanley Electric Co Ltd | Light responsive and measuring device |
US3500049A (en) * | 1967-04-17 | 1970-03-10 | Bendix Corp | Variable albedo earth sensor of a relatively narrow angular effective field of view |
US3486031A (en) * | 1967-06-05 | 1969-12-23 | Bell Telephone Labor Inc | Memory cell utilizing optical read-in |
US3475613A (en) * | 1967-10-09 | 1969-10-28 | Trw Inc | Three-photocell network for detecting small-area radiation source in presence of large area background noise radiation |
FR1600914A (fr) * | 1968-11-18 | 1970-08-03 | ||
FR2106761A5 (fr) * | 1970-09-23 | 1972-05-05 | Cilas | |
US3845319A (en) * | 1971-10-22 | 1974-10-29 | Sick Erwin | Method and apparatus for the accurate detection of the passage of the edge of a straight contrast jump |
JPS4945786A (ja) * | 1972-09-04 | 1974-05-01 | Nippon Kogaku Kk | Jidosotsukoki |
US3924256A (en) * | 1974-01-08 | 1975-12-02 | Morton H Cohen | Burglar alarm switch |
US4054795A (en) * | 1975-12-16 | 1977-10-18 | Bell Telephone Laboratories, Incorporated | Photoelectric sensing system with light source compensating means |
-
1977
- 1977-02-03 DE DE19772704565 patent/DE2704565A1/de active Granted
-
1978
- 1978-01-13 CA CA000294898A patent/CA1134474A/fr not_active Expired
- 1978-01-25 CH CH77478A patent/CH624482A5/de not_active IP Right Cessation
- 1978-01-26 IT IT19665/78A patent/IT1092377B/it active
- 1978-02-01 JP JP939278A patent/JPS5397479A/ja active Pending
- 1978-02-02 SE SE7801247A patent/SE7801247L/xx unknown
- 1978-02-02 FR FR7802857A patent/FR2379825A1/fr active Granted
-
1980
- 1980-10-30 US US06/202,280 patent/US4388528A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
IT7819665A0 (it) | 1978-01-26 |
CH624482A5 (fr) | 1981-07-31 |
SE7801247L (sv) | 1978-08-04 |
JPS5397479A (en) | 1978-08-25 |
DE2704565C3 (fr) | 1979-10-18 |
US4388528A (en) | 1983-06-14 |
DE2704565A1 (de) | 1978-08-10 |
IT1092377B (it) | 1985-07-12 |
CA1134474A (fr) | 1982-10-26 |
FR2379825A1 (fr) | 1978-09-01 |
DE2704565B2 (fr) | 1979-02-22 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |