GB809481A - Improvements in or relating to electro-acoustic transducers - Google Patents

Improvements in or relating to electro-acoustic transducers

Info

Publication number
GB809481A
GB809481A GB1092856A GB1092856A GB809481A GB 809481 A GB809481 A GB 809481A GB 1092856 A GB1092856 A GB 1092856A GB 1092856 A GB1092856 A GB 1092856A GB 809481 A GB809481 A GB 809481A
Authority
GB
United Kingdom
Prior art keywords
plate
diaphragm
plates
coil
spacer
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
GB1092856A
Inventor
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 GB1092856A priority Critical patent/GB809481A/en
Publication of GB809481A publication Critical patent/GB809481A/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

809,481. Loud-speakers. ROLA CELESTION Ltd. June 28, 1957 [April 10, 1956], No. 10928/56. Class 40 (4). The diaphragm 18 of a miniature moving coil loud-speaker is peripherally mounted on a fibre-board spacer 22 secured by adhesion to the rear surface of a mild steel plate 10 having apertures 11 for the dispersion of sound. A permanent magnet 17 is fixed to the centre of the plate and projects into an aperture 16 in a plate 15 to form a flux gap for the voice coil. Plates 10 and 15 are held in spaced parallel relationship by a lug 13 integral with plate 10. The distance between the plates is such that the diaphragm and speech coil can pass between them, the coil being placed in the opening 16 before the spacer and the magnet are fixed. The spacer is not used if the diaphragm is formed with corrugations to permit compression whilst it is passed between the plates. Dust may be excluded by a fine-mesh fabric at the front and an imperforate cap at the rear. The magnet 11 may be a force fit in an aperture on plate 10. Alternatively it may be secured by a bolt or by adhesive.
GB1092856A 1956-04-10 1956-04-10 Improvements in or relating to electro-acoustic transducers Expired GB809481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1092856A GB809481A (en) 1956-04-10 1956-04-10 Improvements in or relating to electro-acoustic transducers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1092856A GB809481A (en) 1956-04-10 1956-04-10 Improvements in or relating to electro-acoustic transducers

Publications (1)

Publication Number Publication Date
GB809481A true GB809481A (en) 1959-02-25

Family

ID=9976892

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1092856A Expired GB809481A (en) 1956-04-10 1956-04-10 Improvements in or relating to electro-acoustic transducers

Country Status (1)

Country Link
GB (1) GB809481A (en)

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