AT363824B - INTERCOM FOR TRANSMITTING MESSAGES WITHIN CLOSED ROOMS - Google Patents

INTERCOM FOR TRANSMITTING MESSAGES WITHIN CLOSED ROOMS

Info

Publication number
AT363824B
AT363824B AT478376A AT478376A AT363824B AT 363824 B AT363824 B AT 363824B AT 478376 A AT478376 A AT 478376A AT 478376 A AT478376 A AT 478376A AT 363824 B AT363824 B AT 363824B
Authority
AT
Austria
Prior art keywords
intercom
transmitting messages
closed rooms
rooms
closed
Prior art date
Application number
AT478376A
Other languages
German (de)
Other versions
ATA478376A (en
Original Assignee
Neumann Elektronik 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 Neumann Elektronik Gmbh filed Critical Neumann Elektronik Gmbh
Priority to AT831977A priority Critical patent/ATA831977A/en
Publication of ATA478376A publication Critical patent/ATA478376A/en
Application granted granted Critical
Publication of AT363824B publication Critical patent/AT363824B/en

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)
AT478376A 1975-08-02 1976-06-30 INTERCOM FOR TRANSMITTING MESSAGES WITHIN CLOSED ROOMS AT363824B (en)

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 ATA478376A (en) 1981-01-15
AT363824B true 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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
DE2534658A1 (en) 1977-02-03
DE2534658C2 (en) 1987-11-12
CH609815A5 (en) 1979-03-15
ATA478376A (en) 1981-01-15
CH611471A5 (en) 1979-05-31
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