ATA478376A - INTERCOM FOR TRANSMITTING MESSAGES WITHIN CLOSED ROOMS - Google Patents
INTERCOM FOR TRANSMITTING MESSAGES WITHIN CLOSED ROOMSInfo
- Publication number
- ATA478376A ATA478376A AT478376A AT478376A ATA478376A AT A478376 A ATA478376 A AT A478376A AT 478376 A AT478376 A AT 478376A AT 478376 A AT478376 A AT 478376A AT A478376 A ATA478376 A AT A478376A
- Authority
- AT
- Austria
- Prior art keywords
- intercom
- transmitting messages
- closed rooms
- rooms
- closed
- Prior art date
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
- H04B10/114—Indoor or close-range type systems
- H04B10/1149—Arrangements for indoor wireless networking of information
Landscapes
- Engineering & Computer Science (AREA)
- Computing Systems (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Mobile Radio Communication Systems (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT831977A ATA831977A (en) | 1975-08-02 | 1977-11-21 | INTERCHANGEABLE OR INTERCOM SYSTEM WITHIN A CONSTRUCTION OR VEHICLE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752534658 DE2534658C2 (en) | 1975-08-02 | 1975-08-02 | Device for the transmission of messages to a traveling crane |
Publications (2)
Publication Number | Publication Date |
---|---|
ATA478376A true ATA478376A (en) | 1981-01-15 |
AT363824B AT363824B (en) | 1981-09-10 |
Family
ID=5953119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT478376A AT363824B (en) | 1975-08-02 | 1976-06-30 | INTERCOM FOR TRANSMITTING MESSAGES WITHIN CLOSED ROOMS |
Country Status (4)
Country | Link |
---|---|
AT (1) | AT363824B (en) |
BE (1) | BE844715A (en) |
CH (2) | CH609815A5 (en) |
DE (1) | DE2534658C2 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2714540C3 (en) * | 1977-04-01 | 1981-07-09 | Sennheiser Electronic Kg, 3002 Wedemark | Method for the wireless transmission of messages via optical radiation |
GB1595821A (en) * | 1977-04-28 | 1981-08-19 | Texas Instruments Inc | Low-power light information transmission system |
DE3210002A1 (en) * | 1982-03-19 | 1983-09-22 | Alois Zettler Elektrotechnische Fabrik GmbH, 8000 München | Presence display |
DE3308099C2 (en) * | 1983-03-08 | 1986-03-13 | Helmut Hund KG, 6330 Wetzlar | Method for wireless transmission of a parameter for regulating the temperature of a room and a device for carrying out this method |
DE8510644U1 (en) * | 1985-04-11 | 1985-05-30 | proLogistik Gesellschaft für Informations- u. Steuerungssysteme mbH, 4600 Dortmund | Device for the transmission of information from electronic media, in particular by means of infrared radiation |
DE3803541A1 (en) * | 1988-02-05 | 1989-08-17 | Siemens Ag | Receiver unit, for example for a motor vehicle |
DE3920584C1 (en) * | 1989-06-23 | 1990-12-13 | Vermoegensverwaltung Werner Und Manfred Vierling Gesellschaft Buergerlichen Rechts, 8553 Ebermannstadt, De | Location detector for set number of people or objects - uses wideband signal transmitting and receiving arrangement in star configuration within building or complex |
DE4005517A1 (en) * | 1990-02-22 | 1991-09-05 | Sensys Ag | Bidirectional signal transmission system using IR light - has identical devices for simultaneous transmission in both directions |
DE4026073A1 (en) * | 1990-08-17 | 1992-02-20 | Telefunken Systemtechnik | Control point coupling mobile data terminal to fixed data processor - has two components forming transceiver for electromagnetic waves, and air path as transmission line |
DE4336524A1 (en) * | 1993-10-26 | 1995-04-27 | Siemens Nixdorf Inf Syst | Optical interface |
DE4415666A1 (en) * | 1994-05-04 | 1995-11-09 | Hauni Werke Koerber & Co Kg | Hearing protection system on production machines |
DE102004041849A1 (en) * | 2004-08-27 | 2006-03-16 | Sennheiser Electronic Gmbh & Co. Kg | IR radiator assembly |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3191122A (en) * | 1961-12-01 | 1965-06-22 | Seismograph Servier Corp | Communication system for sielded areas |
US3284633A (en) * | 1963-12-24 | 1966-11-08 | Rca Corp | Signal transmission and reception system comprising frequency modulated light beam |
DE1762614A1 (en) * | 1968-07-19 | 1970-07-02 | Grimm Dr Ing Olaf | Inductive transmission device |
DE2211179A1 (en) * | 1972-03-04 | 1973-09-06 | Licentia Gmbh | DEVICE FOR INDUCTIVE COUPLING OF TRANSMITTER AND RECEIVING DEVICES IN VEHICLES WITH CABLES LAYING ALONG THE DRIVING ROUTE |
DE2234445C3 (en) * | 1972-07-13 | 1980-04-24 | Allgemeine Elektricitaets-Gesellschaft Aeg-Telefunken, 1000 Berlin Und 6000 Frankfurt | Optical communication system |
DE2342345B2 (en) * | 1973-08-22 | 1975-09-11 | Norddeutsche Mende Rundfunk Kg, 2800 Bremen | Method for the transmission of the audio information received from a television or radio receiver via a wide beam of light |
-
1975
- 1975-08-02 DE DE19752534658 patent/DE2534658C2/en not_active Expired
-
1976
- 1976-06-30 AT AT478376A patent/AT363824B/en not_active IP Right Cessation
- 1976-07-21 CH CH935776A patent/CH609815A5/en not_active IP Right Cessation
- 1976-07-21 CH CH1108378A patent/CH611471A5/en not_active IP Right Cessation
- 1976-07-30 BE BE169407A patent/BE844715A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CH611471A5 (en) | 1979-05-31 |
CH609815A5 (en) | 1979-03-15 |
DE2534658A1 (en) | 1977-02-03 |
AT363824B (en) | 1981-09-10 |
DE2534658C2 (en) | 1987-11-12 |
BE844715A (en) | 1976-11-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ELJ | Ceased due to non-payment of the annual fee |