GB911411A - Improvements in or relating to moving coil loudspeakers and to radio receiving apparatus including such loudspeakers - Google Patents

Improvements in or relating to moving coil loudspeakers and to radio receiving apparatus including such loudspeakers

Info

Publication number
GB911411A
GB911411A GB766659A GB766659A GB911411A GB 911411 A GB911411 A GB 911411A GB 766659 A GB766659 A GB 766659A GB 766659 A GB766659 A GB 766659A GB 911411 A GB911411 A GB 911411A
Authority
GB
United Kingdom
Prior art keywords
loudspeakers
relating
moving coil
receiving apparatus
apparatus including
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
GB766659A
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.)
Telefunken AG
Original Assignee
Telefunken AG
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 Telefunken AG filed Critical Telefunken AG
Publication of GB911411A publication Critical patent/GB911411A/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)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

911,411. Loud-speakers. TELEFUNKEN G.m.b.H. March 5, 1959 [March 5, 1958], No. 7666/59. Drawings to Specification. Class 40 (4). In a moving-coil loud-speaker having a diaphragm of maximum diameter not greater than 215 mm., one or both polepieces have applied to their surface or surfaces adjacent the moving coil a coating of material of higher conductivity than that of the polepiece or polepieces, the thickness of the coating or aggregate thickness of both coatings being 0.2 Π0.05 mm. Where the loud-speaker is elliptical the geometric mean should be not greater than 215 mm. The coating may be of copper or silver.
GB766659A 1959-03-05 1959-03-05 Improvements in or relating to moving coil loudspeakers and to radio receiving apparatus including such loudspeakers Expired GB911411A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET0014840 1959-03-05

Publications (1)

Publication Number Publication Date
GB911411A true GB911411A (en) 1962-11-28

Family

ID=7547747

Family Applications (1)

Application Number Title Priority Date Filing Date
GB766659A Expired GB911411A (en) 1959-03-05 1959-03-05 Improvements in or relating to moving coil loudspeakers and to radio receiving apparatus including such loudspeakers

Country Status (1)

Country Link
GB (1) GB911411A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0208907A1 (en) * 1985-07-17 1987-01-21 WILLI STUDER AG Fabrik für elektronische Apparate Magnetic system for a dynamic loudspeaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0208907A1 (en) * 1985-07-17 1987-01-21 WILLI STUDER AG Fabrik für elektronische Apparate Magnetic system for a dynamic loudspeaker
US4980921A (en) * 1985-07-17 1990-12-25 Willi Studer Ag Magnetic system for dynamic loudspeaker

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