Syuichi Takamastu

Title: Syuichi Takamastu and His DC Motor Field Pole Patent.

Introduction

Syuichi Takamastu is an inventor associated with Hitachi, Japan, and Hitachi, Ltd. His recorded patent concerns the design of field poles for a direct-current (DC) motor.

Latest Patents

Takamastu’s listed patent is titled “Field pole structure of DC motor.” It describes multiple magnetic field poles attached to the inner surface of a motor yoke and positioned opposite the armature. Each pole includes a permanent magnet and an auxiliary pole member with greater permeability than the magnet’s reversible permeability.

The patent further describes a magnet formed from two integrally joined members. One member uses material with high coercive force, while the other uses material with high residual magnetic flux density. Their boundary is a mixed-material region. The design combines these magnetic properties within the field pole structure. Takamastu is credited with 1 patent.

Career Highlights

Takamastu’s documented invention focuses on the construction and magnetic characteristics of DC motor field poles. The available information identifies his association with Hitachi, Ltd., but does not provide further details about his career or the patent’s development.

Collaborations

Humio Tajima and Tosio Tomite are listed as Takamastu’s coworkers. The available information does not specify their roles in the patent or whether they collaborated on this invention.

Conclusion

Syuichi Takamastu’s recorded patent presents a DC motor field pole design that combines magnetic materials with distinct properties, reflecting his documented connection to motor technology at Hitachi, Ltd.