JPS6449399A - Speaker - Google Patents
SpeakerInfo
- 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
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.
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)
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 |
-
1987
- 1987-08-19 JP JP20565687A patent/JPS6449399A/en active Pending
Cited By (2)
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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