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This is a record of a document published elsewhere, first published by the United States Patent and Trademark Office, as US-5258735-A, on 2 November 1993. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000003365

Multi-pole composite magnet used in a magnetic encoder

Published
Permanent URL
Classification
Sensors, Controls & Machine Vision › Position and Presence Sensing
Assignee
ALLWINE JR ELMER C
Original source
US-5258735-A, the United States Patent and Trademark Office, 2 November 1993
Document SHA-256
7f1ac8c06dc5052f8abbe2b4b54ef54131212d7d4667b67194ab76f935580b96

The composite magnet of the present invention comprises two pieces of permanent magnet material formed into a complementary pattern of holes and projections. The two pieces are magnetized in opposite axial directions. The two pieces, magnetized in this manner, when placed together form an interlocking single element which exhibits a magnetic pattern of north-south poles which matches the pattern of holes and projections. In this manner, the composite magnet appears as a single permanent magnet, exhibiting a sharp, strong, and well-defined magnetic pattern. In accordance with the present invention, the composite magnet may be used in many applications including, but not limited to encoders, one of which is described in detail.

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Abstract

The composite magnet of the present invention comprises two pieces of permanent magnet material formed into a complementary pattern of holes and projections. The two pieces are magnetized in opposite axial directions. The two pieces, magnetized in this manner, when placed together form an interlocking single element which exhibits a magnetic pattern of north-south poles which matches the pattern of holes and projections. In this manner, the composite magnet appears as a single permanent magnet, exhibiting a sharp, strong, and well-defined magnetic pattern. In accordance with the present invention, the composite magnet may be used in many applications including, but not limited to encoders, one of which is described in detail.

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Publication information

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Citation

OpenTechnical Publication OT-2026-000003365, “Multi-pole composite magnet used in a magnetic encoder,” published September 15, 2026 at 20:17:00 UTC, https://opentechnical.org/p/OT-2026-000003365.

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This record reproduces a document published elsewhere and is provided for reference and study. Rights in the original remain with its owner. See the publication policy.