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JPS55143006A - Varying method of magnetic flux density of magnetic pole for permanent magnet - Google Patents

Varying method of magnetic flux density of magnetic pole for permanent magnet

Info

Publication number
JPS55143006A
JPS55143006A JP5162779A JP5162779A JPS55143006A JP S55143006 A JPS55143006 A JP S55143006A JP 5162779 A JP5162779 A JP 5162779A JP 5162779 A JP5162779 A JP 5162779A JP S55143006 A JPS55143006 A JP S55143006A
Authority
JP
Japan
Prior art keywords
plates
magnet
ferromagnetic substance
flux density
permanent magnet
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.)
Granted
Application number
JP5162779A
Other languages
Japanese (ja)
Other versions
JPS5923447B2 (en
Inventor
Tetsukazu Imai
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP54051627A priority Critical patent/JPS5923447B2/en
Publication of JPS55143006A publication Critical patent/JPS55143006A/en
Publication of JPS5923447B2 publication Critical patent/JPS5923447B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/04—Means for releasing the attractive force

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)

Abstract

PURPOSE:To increase or decrease the attracting strength of a permanent magnet to a ferromagnetic substance provided at the end of a supporting plate by arranging a circular magnet while inserting a shaft into a slot opening between two iron supporting plates having longitudinal guide grooves and moving back and forth the magnet along the slot opening. CONSTITUTION:Two iron supporting plates 2, 3 provided with longitudinal guide slot openings 5, 6, respectively are arranged with a gap therebetween, and a ferromagnetic substance 9 is disposed at the ends of the plates 2 and 3. A disklike ferrite magnet 1 is so assembled in a slidable air gap 4 between the plates 2 and 3 while inserting shafts 1a into the openings 5 and 6 between the plates 2 and 3, and provided longitudinally movably. When they are thus assembled and the magnet 1 is approached to the ferromagnetic substance 9, the latter is strongly attracted to N and S pole pieces 7 and 8 produced at the ends of the plates 2 and 3. When they are separated, the attracting strength is vanished. Therefore, it can increase or decrease the magnetic flux density of the ferromagnetic substance 9 adpated for opening or closing a door or the like.
JP54051627A 1979-04-26 1979-04-26 Method of changing the magnetic flux density of the magnetic pole part of a permanent magnet Expired JPS5923447B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54051627A JPS5923447B2 (en) 1979-04-26 1979-04-26 Method of changing the magnetic flux density of the magnetic pole part of a permanent magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54051627A JPS5923447B2 (en) 1979-04-26 1979-04-26 Method of changing the magnetic flux density of the magnetic pole part of a permanent magnet

Publications (2)

Publication Number Publication Date
JPS55143006A true JPS55143006A (en) 1980-11-08
JPS5923447B2 JPS5923447B2 (en) 1984-06-02

Family

ID=12892085

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54051627A Expired JPS5923447B2 (en) 1979-04-26 1979-04-26 Method of changing the magnetic flux density of the magnetic pole part of a permanent magnet

Country Status (1)

Country Link
JP (1) JPS5923447B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0348074U (en) * 1989-09-14 1991-05-08
CN104440777A (en) * 2013-09-24 2015-03-25 海洋王（东莞）照明科技有限公司 Magnet separation device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6217452U (en) * 1985-07-18 1987-02-02

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5054182U (en) * 1973-09-11 1975-05-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5054182U (en) * 1973-09-11 1975-05-23

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0348074U (en) * 1989-09-14 1991-05-08
CN104440777A (en) * 2013-09-24 2015-03-25 海洋王（东莞）照明科技有限公司 Magnet separation device

Also Published As

Publication number Publication date
JPS5923447B2 (en) 1984-06-02

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