FR666849A - Electro-magnetic reader - Google Patents

Electro-magnetic reader

Info

Publication number
FR666849A
FR666849A FR666849DA FR666849A FR 666849 A FR666849 A FR 666849A FR 666849D A FR666849D A FR 666849DA FR 666849 A FR666849 A FR 666849A
Authority
FR
France
Prior art keywords
electro
magnetic reader
reader
magnetic
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.)
Herbelot Et Worms SA Des Ets
Original Assignee
Herbelot Et Worms SA Des Ets
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 Herbelot Et Worms SA Des Ets filed Critical Herbelot Et Worms SA Des Ets
Application granted granted Critical
Publication of FR666849A publication Critical patent/FR666849A/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
    • 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)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR666849D 1928-04-07 1928-04-07 Electro-magnetic reader Expired FR666849A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR666849T 1928-04-07

Publications (1)

Publication Number Publication Date
FR666849A true FR666849A (en) 1929-10-07

Family

ID=9014108

Family Applications (1)

Application Number Title Priority Date Filing Date
FR666849D Expired FR666849A (en) 1928-04-07 1928-04-07 Electro-magnetic reader

Country Status (1)

Country Link
FR (1) FR666849A (en)

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