FR861055A - Appareil téléphonique, notamment à haut-parleur - Google Patents

Appareil téléphonique, notamment à haut-parleur

Info

Publication number
FR861055A
FR861055A FR861055DA FR861055A FR 861055 A FR861055 A FR 861055A FR 861055D A FR861055D A FR 861055DA FR 861055 A FR861055 A FR 861055A
Authority
FR
France
Prior art keywords
loudspeaker
telephone device
telephone
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
Other languages
English (en)
Inventor
Ignazio Faranda
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 filed Critical
Application granted granted Critical
Publication of FR861055A publication Critical patent/FR861055A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/62—Constructional arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
FR861055D 1938-10-22 1939-10-21 Appareil téléphonique, notamment à haut-parleur Expired FR861055A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT861055X 1938-10-22

Publications (1)

Publication Number Publication Date
FR861055A true FR861055A (fr) 1941-01-31

Family

ID=11330021

Family Applications (1)

Application Number Title Priority Date Filing Date
FR861055D Expired FR861055A (fr) 1938-10-22 1939-10-21 Appareil téléphonique, notamment à haut-parleur

Country Status (2)

Country Link
DE (1) DE730333C (fr)
FR (1) FR861055A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE950920C (de) * 1950-06-08 1956-10-18 John Charles Sydney Branson Verstaerkergeraet zum Auflegen eines Fernhoerers zwecks handfreier Gespraechsfuehrung
US2648250A (en) * 1950-10-30 1953-08-11 Theodor W Zobel Interferometer apparatus with measuring grid
DE971783C (de) * 1952-07-25 1959-03-26 Standard Elek K Lorenz Ag Anorndung fuer Fernsprechapparate mit einer der Hoerkapsel vorschaltbaren und in demHandapparat angeordneten Verstaerkereinrichtung

Also Published As

Publication number Publication date
DE730333C (de) 1943-01-11

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