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GB617906A - Improvements in and relating to magnets for moving coil loud speakers and microphones - Google Patents

Improvements in and relating to magnets for moving coil loud speakers and microphones

Info

Publication number
GB617906A
GB617906A GB1053046A GB1053046A GB617906A GB 617906 A GB617906 A GB 617906A GB 1053046 A GB1053046 A GB 1053046A GB 1053046 A GB1053046 A GB 1053046A GB 617906 A GB617906 A GB 617906A
Authority
GB
United Kingdom
Prior art keywords
magnets
magnet
microphones
relating
moving coil
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
GB1053046A
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.)
NESCO PRODUCTS Ltd
Original Assignee
NESCO PRODUCTS 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 NESCO PRODUCTS Ltd filed Critical NESCO PRODUCTS Ltd
Priority to GB1053046A priority Critical patent/GB617906A/en
Publication of GB617906A publication Critical patent/GB617906A/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)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

617,906. Magnets. CARTER, J. G., and NESCO PRODUCTS, Ltd. April 5, 1946, No. 10530. [Class 35] The inner and outer pole pieces of a pot magnet are held in the desired position by cast or moulded non-magnetic material, the mould having lugs to form air vents adjacent the centre pole communicating with the interior of the magnet assembly. As shown, the outer pole 1 has slots 7 to form keys holding the casting 6 between the central pole 2 and the ring magnet 5, the air gap being, determined by the annular projection 4 on the mould 3. The projection 4 is also arranged to provide vents communicating with the magnet interior. Specification 377,461 is referred to.
GB1053046A 1946-04-05 1946-04-05 Improvements in and relating to magnets for moving coil loud speakers and microphones Expired GB617906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1053046A GB617906A (en) 1946-04-05 1946-04-05 Improvements in and relating to magnets for moving coil loud speakers and microphones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1053046A GB617906A (en) 1946-04-05 1946-04-05 Improvements in and relating to magnets for moving coil loud speakers and microphones

Publications (1)

Publication Number Publication Date
GB617906A true GB617906A (en) 1949-02-14

Family

ID=9969523

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1053046A Expired GB617906A (en) 1946-04-05 1946-04-05 Improvements in and relating to magnets for moving coil loud speakers and microphones

Country Status (1)

Country Link
GB (1) GB617906A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862069A (en) * 1956-02-28 1958-11-25 Roanwell Corp Dynamic transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862069A (en) * 1956-02-28 1958-11-25 Roanwell Corp Dynamic transducer

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