GB395242A - Improvements in and relating to systems for transmitting intelligence - Google Patents
Improvements in and relating to systems for transmitting intelligenceInfo
- Publication number
- GB395242A GB395242A GB33803/32A GB3380332A GB395242A GB 395242 A GB395242 A GB 395242A GB 33803/32 A GB33803/32 A GB 33803/32A GB 3380332 A GB3380332 A GB 3380332A GB 395242 A GB395242 A GB 395242A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- photo
- amplifier
- varies
- radio
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
395,242. Signalling by light. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Alexanderson, E. F. W.; 8, Adams Road, Schenectady, New York, U.S.A.) Nov. 29, 1932, No. 33803. Convention date, Dec. 19, 1931. [Classes 40 (iii) and 40 (v).] A method of transmitting intelligence comprises producing a radio-frequency current, modulated in accordance with the intelligence to be transmitted, which varies a light beam, Photo-electric cells 17, 18 receive light from an object 16 being scanned, the picture currents modulating a radio-frequency oscillation at 20. A transformer 5 varies the light from the arc 1, a shield 9 preventing light from the glowing electrodes from being transmitted. At the receiver, a photo-electric cell 28 receives the light, the currents produced being amplified at 29 and fed to a television receiver 31. Similarly a microphone 22 may modulate light from another arc, the received signals being similarly fed to an amplifier 33 and loud-speaker 34. The amplifier 33 may be alternatively connected to an aerial 36 by switch 32. The receiving cells 28 are preferably housed in a rotatable casing so as to be directed towards a desired transmitter.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US395242XA | 1931-12-19 | 1931-12-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB395242A true GB395242A (en) | 1933-07-13 |
Family
ID=21905935
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33803/32A Expired GB395242A (en) | 1931-12-19 | 1932-11-29 | Improvements in and relating to systems for transmitting intelligence |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB395242A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2212021A (en) * | 1987-11-06 | 1989-07-12 | Stc Plc | Radio frequency generator |
-
1932
- 1932-11-29 GB GB33803/32A patent/GB395242A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2212021A (en) * | 1987-11-06 | 1989-07-12 | Stc Plc | Radio frequency generator |
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