EP0272059A3 - Loudspeakers and their production - Google Patents

Loudspeakers and their production Download PDF

Info

Publication number
EP0272059A3
EP0272059A3 EP87310904A EP87310904A EP0272059A3 EP 0272059 A3 EP0272059 A3 EP 0272059A3 EP 87310904 A EP87310904 A EP 87310904A EP 87310904 A EP87310904 A EP 87310904A EP 0272059 A3 EP0272059 A3 EP 0272059A3
Authority
EP
European Patent Office
Prior art keywords
loudspeaker
cone
loudspeakers
production
principally
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.)
Withdrawn
Application number
EP87310904A
Other languages
German (de)
French (fr)
Other versions
EP0272059A2 (en
Inventor
Philip Keith Glen Jones
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.)
Acoustic Energy Ltd
Original Assignee
Acoustic Energy 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 Acoustic Energy Ltd filed Critical Acoustic Energy Ltd
Publication of EP0272059A2 publication Critical patent/EP0272059A2/en
Publication of EP0272059A3 publication Critical patent/EP0272059A3/en
Withdrawn legal-status Critical Current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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • 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
    • H04R9/04—Construction, mounting, or centering of coil

Abstract

The straight-sided cone or diaphragm (2) of a moving coil loudspeaker is formed wholly or principally from aluminium which is spun substantially to double its tensile strength, the spinning process being conventional and preferably being effected manually (Fig. 1). Most advantageously, the formed cone (2) is hard anodised on both sides to increase rigidity and heat radiation. A loudspeaker in accordance with the invention has approximately two and one third times the sound volume capacity of a conventional loudspeaker of comparable size without producing any detectable sound distortion.
EP87310904A 1986-12-17 1987-12-11 Loudspeakers and their production Withdrawn EP0272059A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868630092A GB8630092D0 (en) 1986-12-17 1986-12-17 Loudspeakers
GB8630092 1986-12-17

Publications (2)

Publication Number Publication Date
EP0272059A2 EP0272059A2 (en) 1988-06-22
EP0272059A3 true EP0272059A3 (en) 1990-03-21

Family

ID=10609132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87310904A Withdrawn EP0272059A3 (en) 1986-12-17 1987-12-11 Loudspeakers and their production

Country Status (2)

Country Link
EP (1) EP0272059A3 (en)
GB (1) GB8630092D0 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925626A (en) * 1974-02-22 1975-12-09 Jr Robert John Stallings Dynamic speaker having dome diaphragm and basket frequency
EP0244087A2 (en) * 1986-04-26 1987-11-04 Northern Telecom Europe Limited Remote temperature-compensated pressure sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925626A (en) * 1974-02-22 1975-12-09 Jr Robert John Stallings Dynamic speaker having dome diaphragm and basket frequency
EP0244087A2 (en) * 1986-04-26 1987-11-04 Northern Telecom Europe Limited Remote temperature-compensated pressure sensor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JOURNAL OF THE AUDIO ENGINEERING SOCIETY, vol. 25, no. 5, May 1977, pages 294-299, New York, US; J.R. GILLIOM et al.: "Design problems of high-level cone loudspeakers" *
TOOLING & PRODUCTION, vol. 46, no. 4, July 1980, pages 75-77, Solon, OH, US; T. HUDSON: "CNC comes to METAL SPINNING" *

Also Published As

Publication number Publication date
EP0272059A2 (en) 1988-06-22
GB8630092D0 (en) 1987-01-28

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