GB447750A - Improvements relating to loudspeakers - Google Patents

Improvements relating to loudspeakers

Info

Publication number
GB447750A
GB447750A GB3018334A GB3018334A GB447750A GB 447750 A GB447750 A GB 447750A GB 3018334 A GB3018334 A GB 3018334A GB 3018334 A GB3018334 A GB 3018334A GB 447750 A GB447750 A GB 447750A
Authority
GB
United Kingdom
Prior art keywords
coil
sea
loud
hum
loudspeakers
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
GB3018334A
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.)
ARTHUR ERNEST FALKUS
EK Cole Ltd
Original Assignee
ARTHUR ERNEST FALKUS
EK Cole 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 ARTHUR ERNEST FALKUS, EK Cole Ltd filed Critical ARTHUR ERNEST FALKUS
Priority to GB3018334A priority Critical patent/GB447750A/en
Publication of GB447750A publication Critical patent/GB447750A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

447,750. Loud-speakers. COLE, Ltd., E. K., Priory Crescent, Southend-on-Sea, and FALKUS, A. E., 280, Station Road, Westcliffon-Sea. Oct. 22, 1934, No. 30183. [Class 40 (iv)] In a moving- coil loud-speaker, the field magnet is formed by sections 1, 2, 3 mounted on a supporting member 5 to provide symmetrically disposed gaps 7, 9 in which are located a speech coil 6 and a fixed hum-neutralizing coil 8 respectively to reduce the hum due to ripples in the current supplied to the field winding 4 mounted on the central section 3 of the core. The gap 9 may be filled with non-magnetic material in which the neutralizing coil 8 is embedded.
GB3018334A 1934-10-22 1934-10-22 Improvements relating to loudspeakers Expired GB447750A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3018334A GB447750A (en) 1934-10-22 1934-10-22 Improvements relating to loudspeakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3018334A GB447750A (en) 1934-10-22 1934-10-22 Improvements relating to loudspeakers

Publications (1)

Publication Number Publication Date
GB447750A true GB447750A (en) 1936-05-22

Family

ID=10303583

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3018334A Expired GB447750A (en) 1934-10-22 1934-10-22 Improvements relating to loudspeakers

Country Status (1)

Country Link
GB (1) GB447750A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555390A1 (en) * 1983-11-23 1985-05-24 Telephonie Ind Commerciale Electrodynamic microphone inset protected from interfering variable electromagnetic fields

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555390A1 (en) * 1983-11-23 1985-05-24 Telephonie Ind Commerciale Electrodynamic microphone inset protected from interfering variable electromagnetic fields

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