Location History:
- Wichita, KS (US) (2003 - 2007)
- Stuart, FL (US) (1989 - 2010)
Company Filing History:
7 out of 7 
1 out of 40 
1 out of 832,812 Years Active: 1989-2010
Title: Harold S. Durham: Innovator in Motor Technology
Introduction
Harold S. Durham is a notable inventor based in Stuart, FL (US), recognized for his contributions to motor technology. With a total of 9 patents to his name, he has made significant advancements in the field of electrical engineering.
Latest Patents
One of his latest inventions is the Single Field Rotor Motor. This innovative motor comprises a rotor mounted for rotation with respect to a stator. The stator features a plurality of stator poles, each equipped with a coil to create a magnetic pole force. The rotor is designed with circumferentially spaced salient rotor poles, and it has a first axial end and a second axial end. Magnetic means are incorporated to create an unchanging, single polarity field on all rotor poles by inducing flux into the axial ends of the rotor. Additionally, circuit means are provided to alternately charge the stator coils, allowing for the alternation of polarity in a given stator pole. This alternation attracts and repels the rotor poles, resulting in the rotation of the rotor.
Another version of the Single Field Rotor Motor also features a rotor mounted for rotation with respect to a stator. In this design, the stator has multiple stator poles, each with a coil for generating magnetic pole force. The rotor maintains a constant polarity due to the flux within it. Magnetic means create a pair of magnetic flux fields, and the interaction of these fields causes them to spray radially outward, creating uniform magnetic polarity on the rotor poles. Circuit means are again provided to alternately charge the stator coils, facilitating the rotation of the rotor through the attraction and repulsion of the rotor poles.
Career Highlights
Throughout his career, Harold has worked with various companies, including Tri-Seven Research, Inc. His work has significantly impacted the development of motor technology, showcasing his innovative spirit and technical expertise.
Collaborations
Harold has collaborated with notable individuals such as Gary L. Durham and Ronald D. Schlesch. These collaborations have contributed to the advancement of his inventions and the overall progress in the field.
Conclusion
Harold S. Durham is a distinguished inventor whose work in motor technology has led to several innovative patents. His contributions continue to influence the industry and inspire future advancements in engineering.