FR661117A - Improvements in electromagnetic reproduction and recording devices for phonographs - Google Patents

Improvements in electromagnetic reproduction and recording devices for phonographs

Info

Publication number
FR661117A
FR661117A FR661117DA FR661117A FR 661117 A FR661117 A FR 661117A FR 661117D A FR661117D A FR 661117DA FR 661117 A FR661117 A FR 661117A
Authority
FR
France
Prior art keywords
phonographs
reproduction
electromagnetic
recording devices
recording
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 FR661117A publication Critical patent/FR661117A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrophonic Musical Instruments (AREA)
FR661117D 1927-10-25 1928-09-27 Improvements in electromagnetic reproduction and recording devices for phonographs Expired FR661117A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB661117X 1927-10-25

Publications (1)

Publication Number Publication Date
FR661117A true FR661117A (en) 1929-07-22

Family

ID=10490920

Family Applications (1)

Application Number Title Priority Date Filing Date
FR661117D Expired FR661117A (en) 1927-10-25 1928-09-27 Improvements in electromagnetic reproduction and recording devices for phonographs

Country Status (2)

Country Link
DE (1) DE595821C (en)
FR (1) FR661117A (en)

Also Published As

Publication number Publication date
DE595821C (en) 1934-04-21

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