CH283262A - Installation téléphonique bilatérale en haut-parleur. - Google Patents

Installation téléphonique bilatérale en haut-parleur.

Info

Publication number
CH283262A
CH283262A CH283262DA CH283262A CH 283262 A CH283262 A CH 283262A CH 283262D A CH283262D A CH 283262DA CH 283262 A CH283262 A CH 283262A
Authority
CH
Switzerland
Prior art keywords
loudspeaker
telephone system
bilateral telephone
bilateral
telephone
Prior art date
Application number
Other languages
English (en)
Inventor
Jeanlin M Pierre
Original Assignee
Le Teleampliphone
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 Le Teleampliphone filed Critical Le Teleampliphone
Publication of CH283262A publication Critical patent/CH283262A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
CH283262D 1948-08-12 1949-04-04 Installation téléphonique bilatérale en haut-parleur. CH283262A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR283262X 1948-08-12

Publications (1)

Publication Number Publication Date
CH283262A true CH283262A (fr) 1952-05-31

Family

ID=8887019

Family Applications (1)

Application Number Title Priority Date Filing Date
CH283262D CH283262A (fr) 1948-08-12 1949-04-04 Installation téléphonique bilatérale en haut-parleur.

Country Status (2)

Country Link
US (1) US2545467A (fr)
CH (1) CH283262A (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694749A (en) * 1950-04-18 1954-11-16 Sepco 45 B D Sebastopol Communication system
US2743314A (en) * 1950-09-06 1956-04-24 Le Teleampliphone Soc Two-way loudspeaker telephone installations
GB701607A (en) * 1951-05-29 1953-12-30 Leonard Ernest Ryall Improvements in or relating to two-way telecommunication systems
US2756282A (en) * 1953-01-12 1956-07-24 Sierra Electronic Corp Directional amplifier system and apparatus
US2820096A (en) * 1953-06-13 1958-01-14 Int Standard Electric Corp Circuit arrangement for loudspeaker telephone systems
US2850569A (en) * 1953-09-07 1958-09-02 Defensor A G Electric arrangement for speech transmission in two directions
US3050582A (en) * 1957-10-01 1962-08-21 Jr John L Faherty Anti-feedback system
US3017771A (en) * 1958-07-28 1962-01-23 Bonhomme Francois Robert Liquid level indicators

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1977469A (en) * 1931-07-13 1934-10-16 Crosley Radio Corp Operation of alternating current radioreceivers
FR803389A (fr) * 1935-06-20 1936-09-29 Perfectionnements aux liaisons téléphoniques par postes à haut-parleurs
US2236645A (en) * 1939-08-15 1941-04-01 Levy Jacques Telephonic system
US2336888A (en) * 1942-10-01 1943-12-14 Bell Telephone Labor Inc Two-way telephone system

Also Published As

Publication number Publication date
US2545467A (en) 1951-03-20

Similar Documents

Publication Publication Date Title
CH283262A (fr) Installation téléphonique bilatérale en haut-parleur.
CH275635A (de) Automatische Telephonregistrieranlage.
FR1006508A (fr) Perfectionnements aux installations téléphoniques à haut-parleur
CH291689A (de) Telegraphieempfänger.
CH282893A (fr) Installation de communication.
CH274388A (fr) Installation téléphonique à haut-parleurs et à deux voies.
CH295259A (fr) Installation de communication à courants porteurs.
CH285300A (fr) Installation téléphonique bilatérale en haut-parleur.
CH305270A (fr) Installation téléphonique bilatérale en haut-parleur.
CH290751A (fr) Installation téléphonique bilatérale en haut-parleur.
CH301277A (fr) Installation téléphonique.
CH271526A (de) Telephonapparat.
CH280332A (de) Telephonstation.
CH284627A (fr) Installation de télégraphie.
FR1031047A (fr) Installation téléphonique
CH283261A (fr) Installation téléphonique à deux fils en haut-parleur.
CH271784A (de) Telephonapparat.
CH306520A (fr) Installation téléphonique.
BE486835A (fr) Systeme de telecommunication.
FR996482A (fr) Installation téléphonique à fréquence porteuse à amplificateurs intermédiaires
ES16788Y (es) Soporte de aparatos telefónicos.
DK86661C (da) Signaleringsanlæg.
CA446971A (fr) Systeme de telephonie
CA446504A (fr) Systeme telephonique
CA451267A (fr) Systeme telephonique