FR2322488B3 - - Google Patents

Info

Publication number
FR2322488B3
FR2322488B3 FR7618404A FR7618404A FR2322488B3 FR 2322488 B3 FR2322488 B3 FR 2322488B3 FR 7618404 A FR7618404 A FR 7618404A FR 7618404 A FR7618404 A FR 7618404A FR 2322488 B3 FR2322488 B3 FR 2322488B3
Authority
FR
France
Prior art keywords
light
receiver
signals
tuning scale
emitting diodes
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
Application number
FR7618404A
Other languages
French (fr)
Other versions
FR2322488A1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SABA GmbH
Original Assignee
SABA GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SABA GmbH filed Critical SABA GmbH
Publication of FR2322488A1 publication Critical patent/FR2322488A1/en
Application granted granted Critical
Publication of FR2322488B3 publication Critical patent/FR2322488B3/fr
Granted legal-status Critical Current

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
    • H04B10/50—Transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/08—Constructional details, e.g. cabinet

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

1503265 Light links SABA SCHWERZWALDER APPARATE-BAU-ANSTALT AUGUST SCHWER SOHNE GmbH 19 March 1976 [30 Aug 1975] 11078/76 Heading G1A [Also in Division H3] A receiver has an audio modulated light transmitter 8 comprising light emitting diodes (12), Fig. 2 (not shown) disposed behind a tuning scale 1 for optical transmission of audio signals derived from the receiver to headphones which have a receiver response to the light signals. For signals of two or more channels, equal but differently modulated light transmitters 8 may be arranged side by side and/or one below the other behind the tuning scale. A dark layer (10) on the tuning scale is omitted at places where each light transmitter is disposed behind a filter plate (11) pervious only to infrared light radiated by the light emitting diodes (12). The layer 10 may be of a material pervious to infrared rays so that the light transmitters 8 remain unseen by an observer.
FR7618404A 1975-08-30 1976-06-17 ACOUSTIC FREQUENCY MODULE LIGHT TRANSMITTER ESPECIALLY FOR RADIO RECEIVER DEVICES Granted FR2322488A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19757527487 DE7527487U (en) 1975-08-30 1975-08-30 SOUND MODULATED LIGHT TRANSMITTER IN MESSAGE DEVICES

Publications (2)

Publication Number Publication Date
FR2322488A1 FR2322488A1 (en) 1977-03-25
FR2322488B3 true FR2322488B3 (en) 1979-03-09

Family

ID=6655107

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7618404A Granted FR2322488A1 (en) 1975-08-30 1976-06-17 ACOUSTIC FREQUENCY MODULE LIGHT TRANSMITTER ESPECIALLY FOR RADIO RECEIVER DEVICES

Country Status (8)

Country Link
BE (1) BE836699A (en)
CH (1) CH590593A5 (en)
DE (1) DE7527487U (en)
DK (1) DK976A (en)
FR (1) FR2322488A1 (en)
GB (1) GB1503265A (en)
IT (1) IT219822Z2 (en)
NL (1) NL7600375A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1150715B (en) * 1982-03-19 1986-12-17 Marco Clementi HI=FI car radio with automatic tuner
GB2232290B (en) * 1989-04-11 1994-02-23 Barcrest Ltd Relay system

Also Published As

Publication number Publication date
CH590593A5 (en) 1977-08-15
BE836699A (en) 1976-04-16
GB1503265A (en) 1978-03-08
NL7600375A (en) 1977-03-02
IT219822Z2 (en) 1993-05-18
DE7527487U (en) 1976-01-02
FR2322488A1 (en) 1977-03-25
DK976A (en) 1977-03-01

Similar Documents

Publication Publication Date Title
AU532276B2 (en) 2-wire data transmission
GB1165051A (en) Watchman Location System.
FR2322488B3 (en)
DE3161894D1 (en) Device for separating two light signals emitted by two sources of different wavelengths and transmitted by the same optical fibre, and receiver comprising such a device
GB1295859A (en)
GB1297922A (en)
JPS53117302A (en) Omnibus transmission system
ES415137A2 (en) Limited radiation intercommunication system. (Machine-translation by Google Translate, not legally binding)
DE3069998D1 (en) Method for the transmission of analog information through optical fibres and installation for carrying out the method
JPS52104003A (en) Signal transmission apparatus
IE39093L (en) Camouflaged speech signal transmission system
JPS536A (en) Different program signal transmission system
JPS57152244A (en) Adjusting device for direction of signal light
JPS54140405A (en) Optical communication system
JPS53144204A (en) Transmitting system for optical communication circuit monitor/order signal
FR2391599A1 (en) Digital control delta modulation data signal transmission system - has regulating circuit with non-linear characteristic connected to output of pulse series analyser
FI885324A0 (en) FOERFARANDE FOER ANVAENDNING AV EN SAENDARANLAEGGNING.
JPS5620353A (en) Radio transmitter-receiver
JPS5352002A (en) Light transmission system
JPS57113642A (en) Optical type remote controller
AU290374B2 (en) Transmitter circuit for amplifying two or more carrier oscillations modulated with variable signals
GB898496A (en) Improvements in or relating to speech-signal transmission systems
JPS52116002A (en) Photo receiving circuit
JPS52108711A (en) Non-linear emphasis fm signal transmission system
JPS5422101A (en) Stereo modulation equipment

Legal Events

Date Code Title Description
ST Notification of lapse