FR31850E - Improvements to electromagnetic devices with pole pieces, such as telephone receivers or transmitters - Google Patents

Improvements to electromagnetic devices with pole pieces, such as telephone receivers or transmitters

Info

Publication number
FR31850E
FR31850E FR31850DA FR31850E FR 31850 E FR31850 E FR 31850E FR 31850D A FR31850D A FR 31850DA FR 31850 E FR31850 E FR 31850E
Authority
FR
France
Prior art keywords
transmitters
pole pieces
electromagnetic devices
telephone receivers
receivers
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR31850E publication Critical patent/FR31850E/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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
    • H04R13/02—Telephone receivers
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/22—Clamping rim of diaphragm or cone against seating

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Multimedia (AREA)
  • Electromagnets (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Magnetic Treatment Devices (AREA)
FR31850D 1924-04-17 1926-04-30 Improvements to electromagnetic devices with pole pieces, such as telephone receivers or transmitters Expired FR31850E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9851/24A GB236680A (en) 1924-04-17 1924-04-17 Improvements in telephone receivers and transmitters and the like electromagnetic instruments and the manufacture thereof

Publications (1)

Publication Number Publication Date
FR31850E true FR31850E (en) 1927-06-13

Family

ID=9879979

Family Applications (2)

Application Number Title Priority Date Filing Date
FR598053D Expired FR598053A (en) 1924-04-17 1925-04-16 Improvements to electromagnetic devices with pole pieces, such as telephone receivers or transmitters
FR31850D Expired FR31850E (en) 1924-04-17 1926-04-30 Improvements to electromagnetic devices with pole pieces, such as telephone receivers or transmitters

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR598053D Expired FR598053A (en) 1924-04-17 1925-04-16 Improvements to electromagnetic devices with pole pieces, such as telephone receivers or transmitters

Country Status (3)

Country Link
US (1) US1628383A (en)
FR (2) FR598053A (en)
GB (2) GB236680A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566604A (en) * 1948-03-16 1951-09-04 William C Eaves Electrodynamic loud-speaker assembly
US2522266A (en) * 1948-05-25 1950-09-12 Beltone Hearing Aid Co Magnetic receiver

Also Published As

Publication number Publication date
FR598053A (en) 1925-12-05
US1628383A (en) 1927-05-10
GB258000A (en) 1926-09-10
GB236680A (en) 1925-07-16

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