FR953251A - Appareils électro-acoustiques - Google Patents

Appareils électro-acoustiques

Info

Publication number
FR953251A
FR953251A FR953251DA FR953251A FR 953251 A FR953251 A FR 953251A FR 953251D A FR953251D A FR 953251DA FR 953251 A FR953251 A FR 953251A
Authority
FR
France
Prior art keywords
electro
acoustic devices
acoustic
devices
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
Percy Arthur Childs
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR953251A publication Critical patent/FR953251A/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
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/06—Telephone receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
FR953251D 1939-08-01 1947-09-19 Appareils électro-acoustiques Expired FR953251A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2231839A GB536092A (en) 1939-08-01 1939-08-01 Improvements in or relating to electro-acoustic devices particularly for telephone systems

Publications (1)

Publication Number Publication Date
FR953251A true FR953251A (fr) 1949-12-02

Family

ID=10177445

Family Applications (1)

Application Number Title Priority Date Filing Date
FR953251D Expired FR953251A (fr) 1939-08-01 1947-09-19 Appareils électro-acoustiques

Country Status (2)

Country Link
FR (1) FR953251A (fr)
GB (1) GB536092A (fr)

Also Published As

Publication number Publication date
GB536092A (en) 1941-05-02

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