GB1347808A - Portable transmitter receiver - Google Patents

Portable transmitter receiver

Info

Publication number
GB1347808A
GB1347808A GB2462572A GB1347808DA GB1347808A GB 1347808 A GB1347808 A GB 1347808A GB 2462572 A GB2462572 A GB 2462572A GB 1347808D A GB1347808D A GB 1347808DA GB 1347808 A GB1347808 A GB 1347808A
Authority
GB
United Kingdom
Prior art keywords
winding
ferrite member
transmitter
transmitter receiver
portable transmitter
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
GB2462572A
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.)
Charbonnages de France CDF
Original Assignee
Charbonnages de France CDF
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 Charbonnages de France CDF filed Critical Charbonnages de France CDF
Publication of GB1347808A publication Critical patent/GB1347808A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
    • H04B5/48—Transceivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)

Abstract

1347808 Radio signalling; aerials CHARBONNAGES DE FRANCE 25 May 1972 [26 May 1971] 24645/72 Headings H4L and H4A A transmitter-receiver operating on the same carrier frequency for transmission and reception uses a common ferrite rod aerial, a first winding on the ferrite member coupling the aerial to the transmitter and a second winding on the ferrite member making the coupling to the receiver. A third winding on the ferrite member is tuned by a capacitor to the carrier frequency. Frequency-modulation is used and the lowfrequency amplifier for the microphone is provided with a switch converting it into an oscillator to provide a calling tone.
GB2462572A 1971-05-26 1972-05-25 Portable transmitter receiver Expired GB1347808A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7119158A FR2138470B1 (en) 1971-05-26 1971-05-26

Publications (1)

Publication Number Publication Date
GB1347808A true GB1347808A (en) 1974-02-27

Family

ID=9077682

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2462572A Expired GB1347808A (en) 1971-05-26 1972-05-25 Portable transmitter receiver

Country Status (4)

Country Link
BE (1) BE783786A (en)
DE (1) DE2225508A1 (en)
FR (1) FR2138470B1 (en)
GB (1) GB1347808A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1445983A2 (en) * 2003-02-04 2004-08-11 Siemens Audiologische Technik GmbH Device for transmitting and receiving data for remote controlling hearing aids

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612026B1 (en) * 1987-03-02 1989-06-09 Telemecanique Electrique INDUCTIVE DEVICE FOR QUICK EXCHANGE OF DATA BETWEEN TWO MEDIA
DE4143548C2 (en) * 1990-10-29 1999-12-09 Bio Medic Data Systems Inc Signal reception arrangement using passive transponder

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH337884A (en) * 1955-09-19 1959-04-30 Herbert Dipl Ing Baumer Method for signal transmission by means of carrier waves
NL302518A (en) * 1962-12-31
FR1506266A (en) * 1964-06-11 1967-12-22 Res And Production Ltd Line communication system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1445983A2 (en) * 2003-02-04 2004-08-11 Siemens Audiologische Technik GmbH Device for transmitting and receiving data for remote controlling hearing aids
US7366316B2 (en) 2003-02-04 2008-04-29 Siemens Audiologische Technik Gmbh Device to transmit and receive data for remote control of hearing devices
EP1445983A3 (en) * 2003-02-04 2010-03-10 Siemens Audiologische Technik GmbH Device for transmitting and receiving data for remote controlling hearing aids

Also Published As

Publication number Publication date
DE2225508A1 (en) 1972-12-07
FR2138470B1 (en) 1975-07-04
BE783786A (en) 1972-09-18
FR2138470A1 (en) 1973-01-05

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee