Pinion shaft, clockwork, clock or measuring device without magnetic signature

A pinion shaft, measuring instrument technology, applied in the direction of gear mechanism, frequency stabilization mechanism, frequency stabilization mechanism, etc., can solve problems such as no known
CN108700844APending Publication Date: 2018-10-23OMEGA SA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
OMEGA SA
Publication Date
2018-10-23

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Abstract

The invention relates to a mechanical clock or measuring instrument having metal parts, wherein each part of the mechanical clockwork has a relative magnetic permeability of less than 1.01.
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Description

technical field

[0001] The present invention relates to a watch mechanism, a watch and a measuring device without magnetic features as well as a method and an axel for the manufacture of said watch mechanism, watch and measuring device without magnetic features. Background technique

[0002] There are certain situations where any magnetism is undesirable or even dangerous. For example, in the field of explosive ordnance clearance, even a weak magnetic field is sufficient to trigger the induction detonation device of a bomb or landmine. Therefore, the NATO standard STANAG 2897 for the inspection of non-magnetic tools used in the field of explosive ordnance clearance requires a total magnetic signature of at most 5 nT (nano Tesla).

[0003] Electronic or mechanical watches with metal parts according to the prior art always have magnetic features. The current flow of a digital or quartz watch produces a relatively high magnetic field for these conditions and thus a strong mag...

Claims

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