GB1138115A - Controlling system using modulated light - Google Patents
Controlling system using modulated lightInfo
- Publication number
- GB1138115A GB1138115A GB342867A GB342867A GB1138115A GB 1138115 A GB1138115 A GB 1138115A GB 342867 A GB342867 A GB 342867A GB 342867 A GB342867 A GB 342867A GB 1138115 A GB1138115 A GB 1138115A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- passageway
- receiver
- modulated light
- controlling system
- Prior art date
- 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
- G08B13/184—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 using radiation reflectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
Abstract
1,138,115. Burglar alarms. SERVODAN A/S. 24 Jan., 1967 [26 Jan., 1966], No. 3428/67. Heading G4N. In a system for detecting the passage of a person or object along a passageway, a light source and light receiver are installed together at one side of the passageway, a reflector and modulator being arranged at the other side of the passageway so as to reflect chopped (or modulated) light back to the receiver. The modulator may be a rotating perforated disc or may operate (in unspecified manner) by changing the plane of polarization. The receiver is arranged (in unspecified manner) to give a signal in the absence of light with the particular modulation.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK41066A DK112642B (en) | 1966-01-26 | 1966-01-26 | Control system with modulated light. |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1138115A true GB1138115A (en) | 1968-12-27 |
Family
ID=8093203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB342867A Expired GB1138115A (en) | 1966-01-26 | 1967-01-24 | Controlling system using modulated light |
Country Status (3)
Country | Link |
---|---|
DK (1) | DK112642B (en) |
GB (1) | GB1138115A (en) |
SE (1) | SE324726B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2442457A1 (en) * | 1978-11-27 | 1980-06-20 | Optel | Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap |
WO2015121184A3 (en) * | 2014-02-12 | 2015-12-30 | Designhütte GmbH | Watch winder |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE456952B (en) * | 1982-12-16 | 1988-11-14 | Innovationsteknik Inst Ab | MICRODATOR CONTROL LIGHT RIDAA |
-
1966
- 1966-01-26 DK DK41066A patent/DK112642B/en unknown
-
1967
- 1967-01-19 SE SE79367A patent/SE324726B/xx unknown
- 1967-01-24 GB GB342867A patent/GB1138115A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2442457A1 (en) * | 1978-11-27 | 1980-06-20 | Optel | Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap |
WO2015121184A3 (en) * | 2014-02-12 | 2015-12-30 | Designhütte GmbH | Watch winder |
Also Published As
Publication number | Publication date |
---|---|
SE324726B (en) | 1970-06-08 |
DK112642B (en) | 1968-12-30 |
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