FR613221A - Improvements to electromagnetic microphones or similar apparatus capable of being actuated by means of a phonographic imprint or of being used for the making of this imprint - Google Patents

Improvements to electromagnetic microphones or similar apparatus capable of being actuated by means of a phonographic imprint or of being used for the making of this imprint

Info

Publication number
FR613221A
FR613221A FR613221DA FR613221A FR 613221 A FR613221 A FR 613221A FR 613221D A FR613221D A FR 613221DA FR 613221 A FR613221 A FR 613221A
Authority
FR
France
Prior art keywords
imprint
phonographic
actuated
making
apparatus capable
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Application granted granted Critical
Publication of FR613221A publication Critical patent/FR613221A/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)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
FR613221D 1925-04-04 1926-03-22 Improvements to electromagnetic microphones or similar apparatus capable of being actuated by means of a phonographic imprint or of being used for the making of this imprint Expired FR613221A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9047/25A GB254403A (en) 1925-04-04 1925-04-04 Improvements in electromagnetic microphones or the like, adapted to be actuated by agramophone or like record

Publications (1)

Publication Number Publication Date
FR613221A true FR613221A (en) 1926-11-12

Family

ID=9864356

Family Applications (1)

Application Number Title Priority Date Filing Date
FR613221D Expired FR613221A (en) 1925-04-04 1926-03-22 Improvements to electromagnetic microphones or similar apparatus capable of being actuated by means of a phonographic imprint or of being used for the making of this imprint

Country Status (3)

Country Link
US (1) US1974895A (en)
FR (1) FR613221A (en)
GB (1) GB254403A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496484A (en) * 1946-04-17 1950-02-07 Massa Frank Magnetostrictive phonograph pickup
US2588327A (en) * 1948-01-31 1952-03-04 Dictaphone Corp Recorder head
US3038037A (en) * 1958-01-29 1962-06-05 Mc Graw Edison Co Recording machine

Also Published As

Publication number Publication date
US1974895A (en) 1934-09-25
GB254403A (en) 1926-07-05

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