GB125373A - Improvements in or relating to the Utilisation of High-frequency Alternators in Telephony. - Google Patents

Improvements in or relating to the Utilisation of High-frequency Alternators in Telephony.

Info

Publication number
GB125373A
GB125373A GB8179/19A GB817919A GB125373A GB 125373 A GB125373 A GB 125373A GB 8179/19 A GB8179/19 A GB 8179/19A GB 817919 A GB817919 A GB 817919A GB 125373 A GB125373 A GB 125373A
Authority
GB
United Kingdom
Prior art keywords
coils
currents
inductances
highfrequency
series
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
GB8179/19A
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.)
Societe Francaise Radio Electrique
Original Assignee
Societe Francaise Radio Electrique
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 Societe Francaise Radio Electrique filed Critical Societe Francaise Radio Electrique
Publication of GB125373A publication Critical patent/GB125373A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F13/00—Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers, e.g. telephone-microphone amplifier

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)

Abstract

125,373. Soc. Franþaise Radio-Electrique. Oct. 26, 1917, [Convention date]. Telephonic relays.-In a method of using highfrequency alternators as relays for wire or wireless telephony, the separate exciting-coils 7, 8, 9 of a single alternator, or of three distinct machines, are separately tuned by condensers 10, 11, 12 and inductances 13, 14, 15 to different frequencies that occur in speech, e.g. to frequencies of 400, 800, and 1600, the telephone currents, which are intended to excite the coils, being led to the terminals 16, 17. The highfrequency currents are produced in a second system of coils connected in series and superposed on the coils 7, 8, 9. A source of continuous current is preferably connected in series with the source of telephone currents, and to enable the continuous current to pass through the coils 7, 8, 9, the capacities 10, 11, 12 may be shunted by inductances 19, 20, 21. Specification 102,738, [Class 35, Dynamo-electric generators &c.], is referred to.
GB8179/19A 1917-10-26 1918-10-26 Improvements in or relating to the Utilisation of High-frequency Alternators in Telephony. Expired GB125373A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR125373X 1917-10-26

Publications (1)

Publication Number Publication Date
GB125373A true GB125373A (en) 1919-09-11

Family

ID=32339236

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8179/19A Expired GB125373A (en) 1917-10-26 1918-10-26 Improvements in or relating to the Utilisation of High-frequency Alternators in Telephony.

Country Status (1)

Country Link
GB (1) GB125373A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0465653A1 (en) * 1989-04-04 1992-01-15 Vsesojuzny Nauchno-Issl. I Konstr.-Tekhn. Institut Oborudovania Nefteperabatyvajuschei I Neftekhimicheskoi Promyshlennosti Method for obtaining a promoter of adhesion between rubber and metal cord

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0465653A1 (en) * 1989-04-04 1992-01-15 Vsesojuzny Nauchno-Issl. I Konstr.-Tekhn. Institut Oborudovania Nefteperabatyvajuschei I Neftekhimicheskoi Promyshlennosti Method for obtaining a promoter of adhesion between rubber and metal cord
EP0465653A4 (en) * 1989-04-04 1992-03-11 Vsesojuzny Nauchno-Issledovalesky I Konstruktorsko-Tekhnologichesky Institut Oborudovania Nefteperabatyvajuschei Method for obtaining a promoter of adhesion between rubber and metal cord

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