JPS55163475A - Antimagnetic plate for electronic clock - Google Patents

Antimagnetic plate for electronic clock

Info

Publication number
JPS55163475A
JPS55163475A JP7157179A JP7157179A JPS55163475A JP S55163475 A JPS55163475 A JP S55163475A JP 7157179 A JP7157179 A JP 7157179A JP 7157179 A JP7157179 A JP 7157179A JP S55163475 A JPS55163475 A JP S55163475A
Authority
JP
Japan
Prior art keywords
antimagnetic plate
field
permalloy
permeability
antimagnetic
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
JP7157179A
Other languages
Japanese (ja)
Inventor
Nobuo Ishikawa
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP7157179A priority Critical patent/JPS55163475A/en
Publication of JPS55163475A publication Critical patent/JPS55163475A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B43/00—Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
    • G04B43/007—Antimagnetic alloys

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

PURPOSE:To improve magnetism resistance to an AC field by using a material with high permeability and a material with high conductivity for antimagnetic plate. CONSTITUTION:An antimagnetic plate 6 for which a material 6-a with high permeability like Permalloy and a material 6-b with high conductivity like copper are laminated is used for antimagnetic plate to an external field on a motor for electronic clock. In the above constitution, where an AC field is applied on the antimagnetic plate 6, an eddy current is generated on a porton of the material 6-b, and a magnetic field is generated in the direction to negate a magnetic field applied externally by the eddy current. Thus the magnetic field working externally decreases, the thickness of a portion having a specific permeability intrinsic with the material on the surface of Permalloy 6-a becomes larger than the antimagnetic plate made solidly of Permalloy, and a permeability of te antimagnetic plate to the AC field becomes equivalently large.
JP7157179A 1979-06-07 1979-06-07 Antimagnetic plate for electronic clock Pending JPS55163475A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7157179A JPS55163475A (en) 1979-06-07 1979-06-07 Antimagnetic plate for electronic clock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7157179A JPS55163475A (en) 1979-06-07 1979-06-07 Antimagnetic plate for electronic clock

Publications (1)

Publication Number Publication Date
JPS55163475A true JPS55163475A (en) 1980-12-19

Family

ID=13464518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7157179A Pending JPS55163475A (en) 1979-06-07 1979-06-07 Antimagnetic plate for electronic clock

Country Status (1)

Country Link
JP (1) JPS55163475A (en)

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