FR939303A - Perfectionnements aux dispositifs électro-magnétiques - Google Patents

Perfectionnements aux dispositifs électro-magnétiques

Info

Publication number
FR939303A
FR939303A FR939303DA FR939303A FR 939303 A FR939303 A FR 939303A FR 939303D A FR939303D A FR 939303DA FR 939303 A FR939303 A FR 939303A
Authority
FR
France
Prior art keywords
electro
magnetic devices
magnetic
devices
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
English (en)
Inventor
James Samuel Paterson Roberton
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR939303A publication Critical patent/FR939303A/fr
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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR939303D 1940-11-29 1946-08-29 Perfectionnements aux dispositifs électro-magnétiques Expired FR939303A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB266931X 1940-11-29

Publications (1)

Publication Number Publication Date
FR939303A true FR939303A (fr) 1948-11-09

Family

ID=10247697

Family Applications (1)

Application Number Title Priority Date Filing Date
FR939303D Expired FR939303A (fr) 1940-11-29 1946-08-29 Perfectionnements aux dispositifs électro-magnétiques

Country Status (4)

Country Link
US (1) US2360796A (fr)
BE (1) BE479953A (fr)
CH (1) CH266931A (fr)
FR (1) FR939303A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2485278A (en) * 1945-03-31 1949-10-18 Permoflux Corp Hand microphone and switch
US2493734A (en) * 1945-05-23 1950-01-03 Sonotone Corp Magnetic insert earphone insertable in the ear of the user
US2523775A (en) * 1946-05-17 1950-09-26 Wheeler Insulated Wire Company Electromagnetic transducer
BE476263A (fr) * 1946-06-21
BE473856A (fr) * 1946-10-19
US3060282A (en) * 1957-07-26 1962-10-23 Baldwin Piano Co Electroacoustic transducer
US3066200A (en) * 1958-08-11 1962-11-27 William Ward Jackson Speaker device
NL259873A (fr) * 1960-05-05
DE1155486B (de) * 1961-03-08 1963-10-10 Arnstadt Fernmeldewerk Ringfoermiges oder rechteckfoermiges, in bezug auf den Anker symmetrisches Magnetsystem fuer elektroakustische Wandler
KR20180079856A (ko) * 2017-01-03 2018-07-11 유수진 브리지 에지 방식의 고해상 전자기 스피커

Also Published As

Publication number Publication date
US2360796A (en) 1944-10-17
CH266931A (de) 1950-02-28
BE479953A (fr)

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