GB703809A - Improvements relating to moving coil loudspeakers and other forms of transducer - Google Patents

Improvements relating to moving coil loudspeakers and other forms of transducer

Info

Publication number
GB703809A
GB703809A GB139452A GB139452A GB703809A GB 703809 A GB703809 A GB 703809A GB 139452 A GB139452 A GB 139452A GB 139452 A GB139452 A GB 139452A GB 703809 A GB703809 A GB 703809A
Authority
GB
United Kingdom
Prior art keywords
moving coil
pole piece
enclosing structure
transducer
forms
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
GB139452A
Inventor
Guy Rupert Fountain
Ronald Hastings Rackham
Terence Brian Livingstone
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.)
Tannoy Ltd
Original Assignee
Tannoy 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 Tannoy Ltd filed Critical Tannoy Ltd
Priority to GB139452A priority Critical patent/GB703809A/en
Publication of GB703809A publication Critical patent/GB703809A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers
    • 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
    • H04R9/06—Loudspeakers

Landscapes

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

Abstract

703,809. Magnetic telephone instruments; moving coil loudspeakers. TANNOY, Ltd. Dec. 16, 1952 [Jan. 17, 1952], No. 1394/52. Class 40 (4) A slug 1 of magnet steel is held in place within a pot or similar enclosing structure 2 by means of a hollow tube 9 which passes through the centre of the slug 1 and is secured at one end to the enclosing structure 2 and at the other end to a central pole piece 6. An annular outer pole piece 5 is spaced from the inner pole piece 6 by a ring 17 of non-magnetic material and is fastened to the enclosing structure 2 by bolts 15. As shown, a magnetic system as described above is incorporated in a pressure-type moving coil loudspeaker as described in Specification 703,810 and the tube 9 may be partially or totally obstructed so as to vary the acoustic properties of the cavity behind the diaphragm 20.
GB139452A 1952-01-17 1952-01-17 Improvements relating to moving coil loudspeakers and other forms of transducer Expired GB703809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB139452A GB703809A (en) 1952-01-17 1952-01-17 Improvements relating to moving coil loudspeakers and other forms of transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB139452A GB703809A (en) 1952-01-17 1952-01-17 Improvements relating to moving coil loudspeakers and other forms of transducer

Publications (1)

Publication Number Publication Date
GB703809A true GB703809A (en) 1954-02-10

Family

ID=9721238

Family Applications (1)

Application Number Title Priority Date Filing Date
GB139452A Expired GB703809A (en) 1952-01-17 1952-01-17 Improvements relating to moving coil loudspeakers and other forms of transducer

Country Status (1)

Country Link
GB (1) GB703809A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2139265A1 (en) * 2008-06-23 2009-12-30 Focal-Jmlab (Sa) Motor for a tweeter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2139265A1 (en) * 2008-06-23 2009-12-30 Focal-Jmlab (Sa) Motor for a tweeter

Similar Documents

Publication Publication Date Title
GB382268A (en) Improvements in sound translating devices, particularly loud-speakers and telephone or like transmitters
GB574611A (en) Improvements in or relating to directional microphones
GB672465A (en) Permanent magnet structure for a loudspeaker
GB677225A (en) Improvements in or relating to electro-acoustic transducers
GB653923A (en) Improvements in or relating to electro-acoustic transducers
GB703809A (en) Improvements relating to moving coil loudspeakers and other forms of transducer
GB1534842A (en) Loudspeakers and associated circuitry
GB545712A (en) Improvements in and relating to loud speakers
GB995744A (en) Improvements in electromagnetic electroacoustic transducers
GB1022850A (en) Electro-acoustic transducer
GB442900A (en) Improvements in or relating to permanent magnet assemblies
GB643465A (en) Improvements relating to loudspeakers
GB965591A (en) Improvements in or relating to electro-acoustic converters
GB341531A (en) Loud speakers
GB1002128A (en) Improvements in and relating to electric-acoustic transducers
GB312950A (en) Improvements in loud speakers and the like
GB597935A (en) Improvements in or relating to moving coil loud speakers and other electrical devices having a member movable in a magnetic gap
GB944927A (en) Improvements in or relating to electro-acoustic transducers
GB654364A (en) Improvements in and relating to electro-dynamic devices for interconverting electrical oscillations and sound waves
GB565367A (en) Improvements in moving coil cone loud-speakers and microphones
GB624566A (en) Improvements in or relating to electromagnetic vibratory devices
GB893838A (en) Improvements relating to loudspeakers
GB669883A (en) Electro-acoustic transducers
GB649707A (en) Improvements in or relating to acoustic instruments provided with diaphragms
GB643518A (en) Improvements in or relating to transducers