FR675443A - Improvements made to electromagnetic readers for phonographs - Google Patents

Improvements made to electromagnetic readers for phonographs

Info

Publication number
FR675443A
FR675443A FR675443DA FR675443A FR 675443 A FR675443 A FR 675443A FR 675443D A FR675443D A FR 675443DA FR 675443 A FR675443 A FR 675443A
Authority
FR
France
Prior art keywords
phonographs
improvements made
electromagnetic readers
readers
electromagnetic
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)
Inventor
Sydney James Tyrrell
Donovan William Sayers
Leonard Noel Tyrrell
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.)
ELECTRAMONIC Co Ltd
Original Assignee
ELECTRAMONIC 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 ELECTRAMONIC Co Ltd filed Critical ELECTRAMONIC Co Ltd
Application granted granted Critical
Publication of FR675443A publication Critical patent/FR675443A/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)
  • Electromagnets (AREA)
FR675443D 1928-05-24 1929-05-21 Improvements made to electromagnetic readers for phonographs Expired FR675443A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1528928A GB314648A (en) 1928-05-24 1928-05-24 Improvements in or relating to gramophone "pick-up" devices

Publications (1)

Publication Number Publication Date
FR675443A true FR675443A (en) 1930-02-10

Family

ID=10056418

Family Applications (1)

Application Number Title Priority Date Filing Date
FR675443D Expired FR675443A (en) 1928-05-24 1929-05-21 Improvements made to electromagnetic readers for phonographs

Country Status (3)

Country Link
BE (1) BE360830A (en)
FR (1) FR675443A (en)
GB (1) GB314648A (en)

Also Published As

Publication number Publication date
BE360830A (en) 1929-06-29
GB314648A (en) 1929-07-04

Similar Documents

Publication Publication Date Title
FR672490A (en) Mechanical translator for typotelegraphs
FR677427A (en) Improvements to recording cards for tabulating machines
FR675443A (en) Improvements made to electromagnetic readers for phonographs
FR654341A (en) Improvements to brimbales for pumps
FR672029A (en) Furniture for phonographs
FR693575A (en) Agglomerated magnetic core
FR684418A (en) Improvements to gramophones
FR677444A (en) Advanced box for phonographs
FR683552A (en) Pick-up for gramophones
FR675884A (en) Improvements to phonographs
FR672647A (en) Improvements to phonographs
FR675079A (en) Improvements to phonographs
FR666098A (en) Improvements to phonographs
FR684552A (en) Magnetic substances
FR677405A (en) Improvement to phonograph needle boxes
FR690234A (en) Improvements to phonographs
FR694920A (en) Improvements to phonographs
FR674510A (en) Improvements to magnetic cores
FR685763A (en) Electromagnetic phonographic reproducer
FR649282A (en) Magnetic hydro-compressor
FR672491A (en) Pretranslator for amplifiers
FR654156A (en) Electromagnetic reader device for phonographs
FR706570A (en) Improvements to magnetic cores
FR666121A (en) Improvement in phonographs
FR664835A (en) Improvement in phonographs