FR2322488A1 - ACOUSTIC FREQUENCY MODULE LIGHT TRANSMITTER ESPECIALLY FOR RADIO RECEIVER DEVICES - Google Patents
ACOUSTIC FREQUENCY MODULE LIGHT TRANSMITTER ESPECIALLY FOR RADIO RECEIVER DEVICESInfo
- Publication number
- FR2322488A1 FR2322488A1 FR7618404A FR7618404A FR2322488A1 FR 2322488 A1 FR2322488 A1 FR 2322488A1 FR 7618404 A FR7618404 A FR 7618404A FR 7618404 A FR7618404 A FR 7618404A FR 2322488 A1 FR2322488 A1 FR 2322488A1
- Authority
- FR
- France
- Prior art keywords
- light
- receiver
- light transmitter
- radio receiver
- frequency module
- 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.)
- Granted
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.
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 true FR2322488A1 (en) | 1977-03-25 |
FR2322488B3 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)
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 |
-
1975
- 1975-08-30 DE DE19757527487 patent/DE7527487U/en not_active Expired
- 1975-12-16 BE BE162794A patent/BE836699A/en unknown
-
1976
- 1976-01-02 DK DK976A patent/DK976A/en unknown
- 1976-01-15 NL NL7600375A patent/NL7600375A/en not_active Application Discontinuation
- 1976-03-02 CH CH259876A patent/CH590593A5/xx not_active IP Right Cessation
- 1976-03-19 GB GB1107876A patent/GB1503265A/en not_active Expired
- 1976-06-17 FR FR7618404A patent/FR2322488A1/en active Granted
- 1976-07-19 IT IT2180076U patent/IT219822Z2/en active
Also Published As
Publication number | Publication date |
---|---|
DK976A (en) | 1977-03-01 |
CH590593A5 (en) | 1977-08-15 |
DE7527487U (en) | 1976-01-02 |
NL7600375A (en) | 1977-03-02 |
BE836699A (en) | 1976-04-16 |
FR2322488B3 (en) | 1979-03-09 |
GB1503265A (en) | 1978-03-08 |
IT219822Z2 (en) | 1993-05-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |