GB1020156A - Improvements in or relating to magnet assemblies for loudspeakers - Google Patents

Improvements in or relating to magnet assemblies for loudspeakers

Info

Publication number
GB1020156A
GB1020156A GB3345663A GB3345663A GB1020156A GB 1020156 A GB1020156 A GB 1020156A GB 3345663 A GB3345663 A GB 3345663A GB 3345663 A GB3345663 A GB 3345663A GB 1020156 A GB1020156 A GB 1020156A
Authority
GB
United Kingdom
Prior art keywords
yoke
magnet
cap
lip
polepiece
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
GB3345663A
Inventor
Walter Thomas Pearce
Stanley Thomas Tysoe
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.)
Plessey UK Ltd
Original Assignee
Plessey UK 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 Plessey UK Ltd filed Critical Plessey UK Ltd
Priority to GB3345663A priority Critical patent/GB1020156A/en
Publication of GB1020156A publication Critical patent/GB1020156A/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)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

1,020,156. Loud-speakers. PLESSEY U.K. Ltd. Aug. 17, 1964 [Aug. 23, 1963], No. 33456/63. Heading H4J. A loud-speaker magnet assembly includes a hollow cylindrical magnetic yoke 10 open at one end only, a permanent magnet 11 extending within the yoke 10 from the closed end towards the open end, the magnet 11 being provided with a skirted cap 12 of magnetic material which embraces the end of the magnet 11 adjacent the open end of the yoke and the skirt 12b of which has a peripheral outwardly-extending lip 12c which is engaged by a non-magnetic centring structure 16 retaining the magnet 11 centred within the yoke 10. The yoke 10 is of die-cast ferrous metal and the skirted cap 12 is of ferrous metal. The centring ring 16 is of brass and is of convoluted cross-section. It is held under axial compression with its outer edge held between a top-plate 14, forming an outer polepiece, and the lip of a recess 15 in the yoke 10. Alternatively, the centring ring 16 is a good sliding fit in the yoke 10. In an alternative construction (not shown), the cap 12 is formed by punching or drawing sheet metal, the magnet lip pole-piece corresponding to portion 12a being formed by an additional polepiece of ferrous metal which lies on the face of magnet lip portion 11a and is embraced by the cap. The additional polepiece may be disc-shaped or annular; in the latter construction the cap may have the greater part of its plane end face removed so as to leave an annular lip embracing the periphery of the additional polepiece.
GB3345663A 1963-08-23 1963-08-23 Improvements in or relating to magnet assemblies for loudspeakers Expired GB1020156A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3345663A GB1020156A (en) 1963-08-23 1963-08-23 Improvements in or relating to magnet assemblies for loudspeakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3345663A GB1020156A (en) 1963-08-23 1963-08-23 Improvements in or relating to magnet assemblies for loudspeakers

Publications (1)

Publication Number Publication Date
GB1020156A true GB1020156A (en) 1966-02-16

Family

ID=10353195

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3345663A Expired GB1020156A (en) 1963-08-23 1963-08-23 Improvements in or relating to magnet assemblies for loudspeakers

Country Status (1)

Country Link
GB (1) GB1020156A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2906541A1 (en) * 1978-02-22 1979-08-23 Tannoy Products Ltd VOICE COIL SPEAKER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2906541A1 (en) * 1978-02-22 1979-08-23 Tannoy Products Ltd VOICE COIL SPEAKER

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