Annular magnetic encoder having pole arrangement that...

Details Annular magnetic encoder having pole arrangement that... Annular magnetic encoder having pole arrangement that...

2005-07-12

2010-02-23

Patidar, Jay M (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

Reexamination Certificate

active

07667455

ABSTRACT:
An annular magnetic encoder is provided in which a plurality of S magnetic poles and N magnetic poles are alternately arranged in an arrangement pattern. The arrangement pattern comprises: a plurality of index parts provided in a circumferential direction at fixed intervals; a plurality of standard pitch parts provided between the index parts; and a plurality of specific pitch parts provided in all of the standard pitch parts or in the standard pitch parts other than one standard pitch part, where the specific pitch parts are arranged in different positions within each of the standard pitch parts.

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International Search Report (in English) for PCT/JP2005/012863, ISA/JP, mailed Aug. 30, 2005.

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