Magnetic scale

Details Magnetic scale Magnetic scale

2006-03-29

2009-12-01

Aurora, Reena (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

C033S706000, C033S708000

Reexamination Certificate

active

07626381

ABSTRACT:
Disclosed herein is a magnetic scale including a pipe, a strip-shaped magnetic member having a one side surface in the direction across the thickness thereof as a contact surface adapted to be closely attached to the inner surface of the pipe and the other side surface opposite to the one side surface as a back surface, the magnetic member being inserted in the pipe so as to extend straight in the longitudinal direction of the pipe, the magnetic member being formed with magnetic marks provided by a plurality of N poles and S poles alternately arranged in the longitudinal direction of the magnetic member, and a retainer member inserted in the pipe to press the back surface of the magnetic member toward the contact surface of the magnetic member, thereby maintaining a closely contact condition of the contact surface to the inner surface of the pipe. Accordingly, the magnetic member can be reliably protected to thereby improve its durability.

REFERENCES:
patent: 5588757 (1996-12-01), Unosawa et al.
patent: 198 18 799 (1999-06-01), None
patent: 1 077 139 (2001-02-01), None
patent: 62-226007 (1987-10-01), None
European Search Report, EP 06 25 1740, Dated Aug. 1, 2006.

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