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GB1048602A - Improvements relating to moving coil loudspeakers and the like - Google Patents

Improvements relating to moving coil loudspeakers and the like

Info

Publication number
GB1048602A
GB1048602A GB3925/64A GB392564A GB1048602A GB 1048602 A GB1048602 A GB 1048602A GB 3925/64 A GB3925/64 A GB 3925/64A GB 392564 A GB392564 A GB 392564A GB 1048602 A GB1048602 A GB 1048602A
Authority
GB
United Kingdom
Prior art keywords
moving coil
diaphragm
dust cap
loud
speaker
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
GB3925/64A
Inventor
Dennis Charles Ward
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB3925/64A priority Critical patent/GB1048602A/en
Priority to US374447A priority patent/US3310131A/en
Publication of GB1048602A publication Critical patent/GB1048602A/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
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/045—Mounting
    • 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
    • H04R9/06—Loudspeakers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

1,048,602. Moving coil transducers. ELECTRIC & MUSICAL INDUSTRIES Ltd. Nov. 18, 1964 [Jan. 30, 1964], No. 3925/64. Heading H4J. A moving coil transducer, e.g. an elliptical loud-speaker, has a dust cap 1, Fig. 2, secured to the diaphragm over the end of the moving coil 13, the dust cap being formed of a sheet of material, e.g. aluminium, having a rigidity preferably in excess of that of the diaphragm material, formed with an array of apertures therein. A layer of air pervious dust excluding material, e.g. thin cotton fabric, covers the stiff material. In a loud-speaker with an elliptical cone the dust cap is said to assist in preventing the diaphragm folding across its minor axis.
GB3925/64A 1964-01-30 1964-01-30 Improvements relating to moving coil loudspeakers and the like Expired GB1048602A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3925/64A GB1048602A (en) 1964-01-30 1964-01-30 Improvements relating to moving coil loudspeakers and the like
US374447A US3310131A (en) 1964-01-30 1964-06-11 Reinforcing cap for moving coil loudspeakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3925/64A GB1048602A (en) 1964-01-30 1964-01-30 Improvements relating to moving coil loudspeakers and the like

Publications (1)

Publication Number Publication Date
GB1048602A true GB1048602A (en) 1966-11-16

Family

ID=9767482

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3925/64A Expired GB1048602A (en) 1964-01-30 1964-01-30 Improvements relating to moving coil loudspeakers and the like

Country Status (2)

Country Link
US (1) US3310131A (en)
GB (1) GB1048602A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1083477A (en) * 1965-01-06 1967-09-13 Motorola Inc Transducer
US3554315A (en) * 1968-05-21 1971-01-12 Nippon Musical Instruments Mfg Loudspeaker
US3940576A (en) * 1974-03-19 1976-02-24 Schultz Herbert J Loudspeaker having sound funnelling element
US3939942A (en) * 1974-04-22 1976-02-24 Gore David E Electroacoustic transducers
FR2315741A1 (en) * 1975-06-23 1977-01-21 Setton Jack Loudspeaker housing incorporating amplifier - has power transistors heat sink adjacent housing aperture dimensioned to exploit ventilation stimulated by speaker
WO1983001884A1 (en) * 1981-11-17 1983-05-26 Tiefenbrun, Ivor, Sigmund Loudspeaker assembly
JP3180646B2 (en) * 1995-12-14 2001-06-25 株式会社村田製作所 Speaker
JP4473428B2 (en) * 2000-08-07 2010-06-02 パイオニア株式会社 Speaker device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2107757A (en) * 1936-02-29 1938-02-08 Bell Telephone Labor Inc Acoustic device
US2641329A (en) * 1950-05-29 1953-06-09 Univ Loudspeakers Inc Loud-speaker diaphragm with transversely arched stiffener means
US2890760A (en) * 1956-08-16 1959-06-16 Philco Corp Transducers
US3093207A (en) * 1960-10-04 1963-06-11 R T Bozak Mfg Company Metallic diaphragm for electrodynamic loudspeakers

Also Published As

Publication number Publication date
US3310131A (en) 1967-03-21

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