Donald C McDonald

Title: **Inventor Spotlight: Donald C. McDonald**

Introduction

Donald C. McDonald, an innovative inventor based in Sherborn, Massachusetts, has made significant contributions to the field of electromagnet technology. With a total of three patents to his name, McDonald’s unique designs and implementations demonstrate a blend of practical engineering and creative problem-solving.

Latest Patents

One of McDonald’s latest patents is the **Demagnetizing Apparatus for a Workpiece Holding Electromagnet**. This invention details an electromagnet control apparatus that achieves demagnetization by stepwise adjusting the phase setting of a power control means. Specifically, it utilizes a triggerable, semiconductor switching device to control the average AC voltage applied to a full wave bridge, which energizes the electromagnet. Additionally, reversing switch means are incorporated to switch the direction of the energizing current in successive steps, providing a refined control mechanism.

Another notable patent is the **Load Tilting Magnetic Lift**. This apparatus is designed to magnetically lift and tilt elongate loads, such as steel beams. It features multiple electromagnets arranged in a linear array along a beam structure, each supported by yokes and coupled to stepping motors. These motors enable synchronized rotation of the electromagnets around a pivotal axis, facilitating precise control when lifting and tilting the load. The construction of the device also includes a vertically compliant spring suspension system, which enhances stability and reduces misalignment during operation.

Career Highlights

Throughout his career, Donald C. McDonald has had the opportunity to work with several companies that are pivotal in the electromagnetic industry. Prominent among these are Walker Magnetics Group, Inc., which is known for its advancements in magnetic lifting technology. His work within such organizations has not only advanced his professional journey but also contributed significantly to technological innovations in the field.

Collaborations

McDonald has collaborated with talented professionals in his field, including Roger B. Ela and Dominic F. Pignataro. These collaborations have likely helped foster an environment of creativity and innovation, enabling McDonald to expand his ideas and push the boundaries of electromagnet applications.

Conclusion

In summary, Donald C. McDonald exemplifies the spirit of innovation with his impressive portfolio of patents focusing on electromagnet technology. His work, particularly in demagnetization and magnetic lifting mechanisms, has wide-ranging implications across various industries, positioning him as a notable figure among contemporary inventors. Through his career and collaborations, McDonald continues to inspire future innovations in electromagnet applications.