FR651366A - Improvements in devices used to record and reproduce electrical variations corresponding to sound waves - Google Patents

Improvements in devices used to record and reproduce electrical variations corresponding to sound waves

Info

Publication number
FR651366A
FR651366A FR651366DA FR651366A FR 651366 A FR651366 A FR 651366A FR 651366D A FR651366D A FR 651366DA FR 651366 A FR651366 A FR 651366A
Authority
FR
France
Prior art keywords
record
sound waves
devices used
variations corresponding
electrical variations
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR651366A publication Critical patent/FR651366A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/16—Mounting or connecting stylus to transducer with or without damping means
    • 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
    • H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Moving Of Heads (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Combined Devices Of Dampers And Springs (AREA)
  • Fluid-Damping Devices (AREA)
FR651366D 1927-03-10 1928-03-09 Improvements in devices used to record and reproduce electrical variations corresponding to sound waves Expired FR651366A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US174355A US1760527A (en) 1927-03-10 1927-03-10 Electrical device

Publications (1)

Publication Number Publication Date
FR651366A true FR651366A (en) 1929-02-18

Family

ID=22635864

Family Applications (1)

Application Number Title Priority Date Filing Date
FR651366D Expired FR651366A (en) 1927-03-10 1928-03-09 Improvements in devices used to record and reproduce electrical variations corresponding to sound waves

Country Status (5)

Country Link
US (1) US1760527A (en)
DE (1) DE546861C (en)
FR (1) FR651366A (en)
GB (1) GB286719A (en)
NL (1) NL29665C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2514379A (en) * 1947-08-25 1950-07-11 Jr Charles R Douglass Electrodynamic recording head

Also Published As

Publication number Publication date
GB286719A (en) 1928-11-22
NL29665C (en)
US1760527A (en) 1930-05-27
DE546861C (en) 1932-03-21

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