Magnetic rubber encoder

Details Magnetic rubber encoder Magnetic rubber encoder

2005-08-09

2005-08-09

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Digital pattern reading type converter

Optical

C384S448000

Reexamination Certificate

active

06927705

ABSTRACT:
A magnetic rubber encoder employing a rubber magnet, of a kind which, within a predetermined range of polarization pitches, the maximum magnetization intensity for the selected polarization pitch can be obtained, is provided. The magnetic rubber encoder1includes an annular magnetic member2made of a rubber material containing a magnet material and having a plurality of opposite magnetic poles N and S alternating with each other in a direction circumferentially thereof. The relationship between the polarization pitch p of each magnetic pole and the thickness w of the magnetic member2is expressed by 0.4 p≦w≦1.0 p. The polarization pitch p is chosen to be within the range of, for example, 0.5 to 1.5 mm.

REFERENCES:
patent: 3568182 (1971-03-01), Jones
patent: 4334166 (1982-06-01), Miyahara et al.
patent: 5967669 (1999-10-01), Ouchi
patent: 6789948 (2004-09-01), Nakajima
Michael C. Brauer et al., Patent Abstracts of Japan, “High-Resolution Coder”, Publication No.: 03-130615, Publication Date: (Jun. 4, 1991).

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