JPS6449399A - Speaker - Google Patents

Speaker

Info

Publication number
JPS6449399A
JPS6449399A JP20565687A JP20565687A JPS6449399A JP S6449399 A JPS6449399 A JP S6449399A JP 20565687 A JP20565687 A JP 20565687A JP 20565687 A JP20565687 A JP 20565687A JP S6449399 A JPS6449399 A JP S6449399A
Authority
JP
Japan
Prior art keywords
high output
voice coil
speaker
superconducting coil
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.)
Pending
Application number
JP20565687A
Other languages
Japanese (ja)
Inventor
Akihiro Okuma
Akinori Toyoda
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP20565687A priority Critical patent/JPS6449399A/en
Publication of JPS6449399A publication Critical patent/JPS6449399A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To obtain a strong magnetic field and the speaker of a high output by using a superconducting coil to a magnet to face to a voice coil each other, generating a Meissner effect and obtaining a complete anti-magnetic body. CONSTITUTION:A superconducting coil 12 is provided to a magnetic core 14 of iron, nickel and cobalt with facing to a voice coil 11 each other. By conducting a sound signal 15 to the voice coil 11, a corn paper 13 is strongly oscillated and the high output which can not be obtained by a permanent magnet, is obtained. Thus, by using the superconducting coil, the small speaker of the high output can be obtained.
JP20565687A 1987-08-19 1987-08-19 Speaker Pending JPS6449399A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20565687A JPS6449399A (en) 1987-08-19 1987-08-19 Speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20565687A JPS6449399A (en) 1987-08-19 1987-08-19 Speaker

Publications (1)

Publication Number Publication Date
JPS6449399A true JPS6449399A (en) 1989-02-23

Family

ID=16510508

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20565687A Pending JPS6449399A (en) 1987-08-19 1987-08-19 Speaker

Country Status (1)

Country Link
JP (1) JPS6449399A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013083883A1 (en) 2011-12-07 2013-06-13 IFP Energies Nouvelles Method for the hydroconversion of petroleum feedstocks in fixed beds for the production of fuel oils having a low sulphur content
WO2017186484A1 (en) 2016-04-27 2017-11-02 IFP Energies Nouvelles Conversion process comprising permutable hydrodemetallization guard beds, a fixed-bed hydrotreatment step and a hydrocracking step in permutable reactors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013083883A1 (en) 2011-12-07 2013-06-13 IFP Energies Nouvelles Method for the hydroconversion of petroleum feedstocks in fixed beds for the production of fuel oils having a low sulphur content
WO2017186484A1 (en) 2016-04-27 2017-11-02 IFP Energies Nouvelles Conversion process comprising permutable hydrodemetallization guard beds, a fixed-bed hydrotreatment step and a hydrocracking step in permutable reactors

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