GB935747A - Improvements in or relating to loudspeakers - Google Patents

Improvements in or relating to loudspeakers

Info

Publication number
GB935747A
GB935747A GB1423060A GB1423060A GB935747A GB 935747 A GB935747 A GB 935747A GB 1423060 A GB1423060 A GB 1423060A GB 1423060 A GB1423060 A GB 1423060A GB 935747 A GB935747 A GB 935747A
Authority
GB
United Kingdom
Prior art keywords
basket
permanent magnet
compensation
magnet
loud
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
GB1423060A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB935747A publication Critical patent/GB935747A/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

935,747. Loud-speakers. PHILIPS ELECTRICAL INDUSTRIES Ltd. April 22, 1960 [April 25, 1959], No. 14230/60. Class 40 (4). [Also in Group XXXV] A loud-speaker has a permanent magnet mounted axially in a basket of weak magnetic material, such as sheet iron, the basket also containing a compensation magnet which equalizes the magnetic potential of the basket and that end of the permanent magnet pointing out of the basket. As shown in Fig. 2, the permanent magnet 2 of a moving coil loud-speaker is mounted, by means not illustrated, in a sheet iron basket 1 the base of which contains an oppositely poled disc-shaped compensation magnet 9. As shown in Fig. 3, the compensation magnet lies on the closed end of the permanent magnet and is covered by an iron plate 14 to form an equipotential surface. A coil 6 and diaphragm 10 are mounted in the basket. The compensation and permanent magnets are preferably of a material containing non-cubic polyoxides of iron with barium, strontium or lead, and calcium may be added to produce high coercivity with low remanence.
GB1423060A 1959-04-25 1960-04-22 Improvements in or relating to loudspeakers Expired GB935747A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP0022663 1959-04-25

Publications (1)

Publication Number Publication Date
GB935747A true GB935747A (en) 1963-09-04

Family

ID=7368840

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1423060A Expired GB935747A (en) 1959-04-25 1960-04-22 Improvements in or relating to loudspeakers

Country Status (2)

Country Link
CH (1) CH382227A (en)
GB (1) GB935747A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134747A (en) * 1983-01-31 1984-08-15 Ibuki Kogyo Co Ltd An improved horn speaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134747A (en) * 1983-01-31 1984-08-15 Ibuki Kogyo Co Ltd An improved horn speaker

Also Published As

Publication number Publication date
CH382227A (en) 1964-09-30

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