Magnetic scale

Details Magnetic scale Magnetic scale

2006-04-04

2008-08-26

Guadalupe-McCall, Yaritza (Department: 2841)

Geometrical instruments

Distance measuring

Scale reading position sensor

C033S706000, C033SDIG010, C324S207240

Reexamination Certificate

active

07415776

ABSTRACT:
A magnetic scale is disclosed wherein a magnetic member is protected with certainty to effectively enhance the durability. The magnetic scale includes a magnetic member provided between outside and inside pipe members and has magnetic graduations magnetized alternately with the N and S poles along the extending direction thereof. When the magnetic member and the inside pipe member are assembled in the outside pipe member, the inside pipe member contacts partly with an inner face of the outside pipe member and partly with a back face of the magnetic member in such a manner as to cover the overall back face. The outer face of the inside pipe member presses the back face of the magnetic member over the overall length so that the close contact face of the magnetic member is closely contacted with the inner face of the outside pipe member.

REFERENCES:
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patent: 7051639 (2006-05-01), Krone et al.
patent: 7353618 (2008-04-01), Shibata et al.
patent: 2006/0220637 (2006-10-01), Shibata et al.
patent: 2007/0220772 (2007-09-01), Kato et al.

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