JPS55158580A - Anti-magnetism plate for electronic clock - Google Patents
Anti-magnetism plate for electronic clockInfo
- Publication number
- JPS55158580A JPS55158580A JP6660479A JP6660479A JPS55158580A JP S55158580 A JPS55158580 A JP S55158580A JP 6660479 A JP6660479 A JP 6660479A JP 6660479 A JP6660479 A JP 6660479A JP S55158580 A JPS55158580 A JP S55158580A
- Authority
- JP
- Japan
- Prior art keywords
- magnetism
- magnetism plate
- magnetic field
- electronic clock
- plate
- 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
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)
- Details Of Measuring And Other Instruments (AREA)
- Electromechanical Clocks (AREA)
- Motor Or Generator Frames (AREA)
Abstract
PURPOSE:To improve the resistance to an AC magnetic field of a motor-carrying electronic clock, by employing therein an anti-magnetism plate consisting of a lamination of a plurality of sheets of a material having a high magnetic permeability with an insulating film inserted therebetween. CONSTITUTION:Sheets 6-a of a material having a high magnetic permeability and an insulating film 6-b are laminated, and the resulting product is used as an anti- magnetism plate for preventing a magnetic field from being applied to a motor in an electronic clock from the outside. When an AC magnetic field is applied to such an anti-magnetism plate of a laminated structure, outer and inner portions of the two layers 6-a, each of which consists of a permalloy, etc. remain to be highly permeable in magnetism. A total thickness of such portions of the layers 6-a that remain to be highly magnetically permeable is greater than the thickness of similar portions of an anti-magnetism plate which is a solid sheet material having a high magnetic permeability. Accordingly, the resistance to an AC magnetic field of an anti-magnetism plate based upon this invention can be equivalently increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6660479A JPS55158580A (en) | 1979-05-29 | 1979-05-29 | Anti-magnetism plate for electronic clock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6660479A JPS55158580A (en) | 1979-05-29 | 1979-05-29 | Anti-magnetism plate for electronic clock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55158580A true JPS55158580A (en) | 1980-12-10 |
Family
ID=13320670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6660479A Pending JPS55158580A (en) | 1979-05-29 | 1979-05-29 | Anti-magnetism plate for electronic clock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55158580A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4539296A (en) * | 1980-10-24 | 1985-09-03 | Olympus Optical Co., Ltd. | Method of analyzing chemical substances |
| JP2019039886A (en) * | 2017-08-29 | 2019-03-14 | カシオ計算機株式会社 | Movement and timepiece |
-
1979
- 1979-05-29 JP JP6660479A patent/JPS55158580A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4539296A (en) * | 1980-10-24 | 1985-09-03 | Olympus Optical Co., Ltd. | Method of analyzing chemical substances |
| JP2019039886A (en) * | 2017-08-29 | 2019-03-14 | カシオ計算機株式会社 | Movement and timepiece |
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