GB674875A - Improvements in permanent magnet assemblies for moving coil loudspeakers, microphones and other instruments - Google Patents

Improvements in permanent magnet assemblies for moving coil loudspeakers, microphones and other instruments

Info

Publication number
GB674875A
GB674875A GB403649A GB403649A GB674875A GB 674875 A GB674875 A GB 674875A GB 403649 A GB403649 A GB 403649A GB 403649 A GB403649 A GB 403649A GB 674875 A GB674875 A GB 674875A
Authority
GB
United Kingdom
Prior art keywords
permanent magnet
microphones
instruments
moving coil
magnet assemblies
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
GB403649A
Inventor
Sidney James Tyrrell
Arthur Charles Young
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.)
ROLA CELESTION Ltd
Original Assignee
ROLA CELESTION 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 ROLA CELESTION Ltd filed Critical ROLA CELESTION Ltd
Priority to GB403649A priority Critical patent/GB674875A/en
Publication of GB674875A publication Critical patent/GB674875A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

674,875. Magnets. ROLA CELESTION, Ltd. May 15, 1950 [Feb. 14, 1949], No. 4036/49. Class 35. A permanent magnet structure, e.g. for loud - speakers, comprises a cylindrical permanent magnet 1, a cup-shaped iron yoke 3 closed at its mouth by a plate 4 having a gap 8 for the coil and a washer 9 which rests against a sleeve 11 of non-magnetic material so as to constrain the magnet 1 against axial movement. The sleeve 11 may be formed by wrapping the magnet 1 with an adhesive tape, or it may be of rubber or brass or plastics. Specification 456,154 is referred to.
GB403649A 1949-02-14 1949-02-14 Improvements in permanent magnet assemblies for moving coil loudspeakers, microphones and other instruments Expired GB674875A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB403649A GB674875A (en) 1949-02-14 1949-02-14 Improvements in permanent magnet assemblies for moving coil loudspeakers, microphones and other instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB403649A GB674875A (en) 1949-02-14 1949-02-14 Improvements in permanent magnet assemblies for moving coil loudspeakers, microphones and other instruments

Publications (1)

Publication Number Publication Date
GB674875A true GB674875A (en) 1952-07-02

Family

ID=9769529

Family Applications (1)

Application Number Title Priority Date Filing Date
GB403649A Expired GB674875A (en) 1949-02-14 1949-02-14 Improvements in permanent magnet assemblies for moving coil loudspeakers, microphones and other instruments

Country Status (1)

Country Link
GB (1) GB674875A (en)

Similar Documents

Publication Publication Date Title
ES252608A1 (en) Magnet system having little stray
IE37725L (en) Transducer device
GB672465A (en) Permanent magnet structure for a loudspeaker
GB677225A (en) Improvements in or relating to electro-acoustic transducers
GB1409789A (en) Magnet assembly
GB674875A (en) Improvements in permanent magnet assemblies for moving coil loudspeakers, microphones and other instruments
GB672467A (en) Improvements in and relating to sound reproducing devices
GB1022850A (en) Electro-acoustic transducer
GB643465A (en) Improvements relating to loudspeakers
GB687363A (en) Improvements in electrodynamic pick-up's
GB643518A (en) Improvements in or relating to transducers
GB673649A (en) Improvements in and relating to magneto-mechanical or electro-magneto-mechanical devices
GB322813A (en) Improvements in or relating to electrical pick-ups and like reproducing or recordingdevices
GB872194A (en) Improvements in or relating to magnet systems
GB646429A (en) Improvements in or relating to stylus-equipped electro-magnetic devices for the recording and reproduction of sound
GB1002128A (en) Improvements in and relating to electric-acoustic transducers
GB517572A (en) Improvements in or relating to electro-magnetic switches or the like
GB935747A (en) Improvements in or relating to loudspeakers
GB603649A (en) Improvements in sound-reproducing devices
GB644948A (en) Improvements in or relating to mechanical oscillating elements with magnetic torsioncontrol
GB602661A (en) Improvements in or relating to gramophone pick-ups
GB646180A (en) Improvements in electrodynamic recording devices
GB834995A (en) Improvements in and relating to magneto bells
GB924932A (en) Improvements in and relating to aerators for aquaria
GB943968A (en) Improvements in or relating to moving coil loudspeakers and like transducers