FR588100A - Improvements to loudspeaker receivers - Google Patents

Improvements to loudspeaker receivers

Info

Publication number
FR588100A
FR588100A FR588100DA FR588100A FR 588100 A FR588100 A FR 588100A FR 588100D A FR588100D A FR 588100DA FR 588100 A FR588100 A FR 588100A
Authority
FR
France
Prior art keywords
loudspeaker
receivers
loudspeaker receivers
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
French (fr)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR588100A publication Critical patent/FR588100A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transducers For Ultrasonic Waves (AREA)
FR588100D 1924-08-14 1924-10-27 Improvements to loudspeaker receivers Expired FR588100A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1927824A GB245810A (en) 1924-08-14 1924-08-14 Improvements in telephone transmitters and receivers and the like

Publications (1)

Publication Number Publication Date
FR588100A true FR588100A (en) 1925-04-29

Family

ID=10126726

Family Applications (1)

Application Number Title Priority Date Filing Date
FR588100D Expired FR588100A (en) 1924-08-14 1924-10-27 Improvements to loudspeaker receivers

Country Status (4)

Country Link
CH (1) CH116239A (en)
DE (1) DE430169C (en)
FR (1) FR588100A (en)
GB (1) GB245810A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE759668C (en) * 1940-04-20 1954-04-22 Aeg Device for electrical signing from or to vehicles by means of ultrasonic waves

Also Published As

Publication number Publication date
CH116239A (en) 1926-08-16
DE430169C (en) 1926-06-12
GB245810A (en) 1926-01-14

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