GB1074160A - Improved loudspeaker - Google Patents

Improved loudspeaker

Info

Publication number
GB1074160A
GB1074160A GB4249964A GB4249964A GB1074160A GB 1074160 A GB1074160 A GB 1074160A GB 4249964 A GB4249964 A GB 4249964A GB 4249964 A GB4249964 A GB 4249964A GB 1074160 A GB1074160 A GB 1074160A
Authority
GB
United Kingdom
Prior art keywords
housing
loud
spacer
magnet
oct
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
GB4249964A
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 Co Australia Pty Ltd
Original Assignee
Rola Co Australia Pty 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
Priority claimed from AU36641/63A external-priority patent/AU287020B2/en
Application filed by Rola Co Australia Pty Ltd filed Critical Rola Co Australia Pty Ltd
Publication of GB1074160A publication Critical patent/GB1074160A/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

1,074,160. Loud-speakers. ROLA CO. (AUSTRALIA) PROPRIETARY Ltd. Oct. 19, 1964 [Oct. 18,1963], No. 42499/64. Heading H4J. A loud-speaker including a magnet assembly incorporating a ring magnet 2 and a diaphragm housing 1 of magnetic material has a spacer 3 of non-magnetic material located between the housing 1 and the magnet assembly. The spacer 3 is a dished washer having its inner rim 4 attached to a polepiece 5 and its outer rim 6 attached to the housing 1. Dimples on the rims 4 and 6 permit projection welding. Housing 1 is of mild steel while spacer 3 is of copper alloy (e.g. brass) or aluminium alloy. Magnetic flux leakage between the front and rear surfaces of the magnet 2 through the housing 1 is minimized. An optimum value of dimension 8 for any loud-speaker may be determined.
GB4249964A 1963-10-18 1964-10-19 Improved loudspeaker Expired GB1074160A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU36641/63A AU287020B2 (en) 1963-10-18 Improved loudspeaker

Publications (1)

Publication Number Publication Date
GB1074160A true GB1074160A (en) 1967-06-28

Family

ID=3723840

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4249964A Expired GB1074160A (en) 1963-10-18 1964-10-19 Improved loudspeaker

Country Status (1)

Country Link
GB (1) GB1074160A (en)

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