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
NL71172C (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
NL121669C (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
KR102706153B1 (ko) * 2017-01-03 2024-09-11 유수진 브리지 에지 방식의 고해상 전자기 스피커

Also Published As

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

Similar Documents

Publication Publication Date Title
FR917580A (fr) Perfectionnements aux freins
FR939303A (fr) Perfectionnements aux dispositifs électro-magnétiques
FR946554A (fr) Perfectionnements aux dispositifs téléphoniques
FR952042A (fr) Perfectionnements aux dispositifs commutateurs électro-magnétiques
FR971517A (fr) Perfectionnements aux dispositifs amortisseurs acoustiques
FR876914A (fr) Perfectionnements aux dispositifs de couplage
FR867141A (fr) Perfectionnements aux électros aimants
FR931082A (fr) Perfectionnements aux dispositifs électroniques
FR865699A (fr) Perfectionnements aux boîtes
FR876922A (fr) Perfectionnements aux dispositifs à suspension magnétique
FR907557A (fr) Perfectionnements aux appareils cinématographiques
FR867832A (fr) Dispositifs piézoélectriques
FR867425A (fr) Perfectionnements apportés aux gazogènes
FR950713A (fr) Perfectionnements apportés aux dispositifs de réfrigération
FR871593A (fr) Perfectionnements apportés aux agendas
FR863685A (fr) Perfectionnements aux dispositifs de démarrage
FR866601A (fr) Perfectionnements aux freins
FR938801A (fr) Perfectionnements aux dispositifs téléphoniques
FR947400A (fr) Perfectionnements apportés aux dispositifs anti-givreurs
FR866038A (fr) Perfectionnements aux dispositifs anti-givreurs
FR927289A (fr) Perfectionnements aux modulateurs
FR864130A (fr) Perfectionnements aux vibrateurs
FR951648A (fr) Perfectionnements aux dispositifs stéréoscopiques
FR944740A (fr) Perfectionnements aux pelleteuses mécaniques
FR877087A (fr) Perfectionnements aux circuits