GB831944A - Improvements in or relating to electro-magnetic sound transducers such as loudspeakers and to sound reproducing apparatus incorporating loudspeakers - Google Patents

Improvements in or relating to electro-magnetic sound transducers such as loudspeakers and to sound reproducing apparatus incorporating loudspeakers

Info

Publication number
GB831944A
GB831944A GB1360355A GB1360355A GB831944A GB 831944 A GB831944 A GB 831944A GB 1360355 A GB1360355 A GB 1360355A GB 1360355 A GB1360355 A GB 1360355A GB 831944 A GB831944 A GB 831944A
Authority
GB
United Kingdom
Prior art keywords
loudspeakers
electro
relating
reproducing apparatus
apparatus incorporating
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
GB1360355A
Inventor
Donald Frederick Spear
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 GB1360355A priority Critical patent/GB831944A/en
Publication of GB831944A publication Critical patent/GB831944A/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

831,944. Loudspeakers and microphones. ELECTRIC & MUSICAL INDUSTRIES Ltd. May 8, 1956 [May 11, 1955], No. 13603/55. Class 40 (4). [Also in Groups XXXV and XL (c)] A moving - coil loudspeaker or microphone has both a permanent magnet 3 and an electromagnet 4 providing the necessary flux across an air gap 11. The electromagnet coil may be used as a choke in a radio receiving circuit.
GB1360355A 1955-05-11 1955-05-11 Improvements in or relating to electro-magnetic sound transducers such as loudspeakers and to sound reproducing apparatus incorporating loudspeakers Expired GB831944A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1360355A GB831944A (en) 1955-05-11 1955-05-11 Improvements in or relating to electro-magnetic sound transducers such as loudspeakers and to sound reproducing apparatus incorporating loudspeakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1360355A GB831944A (en) 1955-05-11 1955-05-11 Improvements in or relating to electro-magnetic sound transducers such as loudspeakers and to sound reproducing apparatus incorporating loudspeakers

Publications (1)

Publication Number Publication Date
GB831944A true GB831944A (en) 1960-04-06

Family

ID=10026041

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1360355A Expired GB831944A (en) 1955-05-11 1955-05-11 Improvements in or relating to electro-magnetic sound transducers such as loudspeakers and to sound reproducing apparatus incorporating loudspeakers

Country Status (1)

Country Link
GB (1) GB831944A (en)

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