Graham A Whitlow

Title: Innovations of Graham A Whitlow: A Pioneer in Electrical Contact Materials

Introduction

Graham A Whitlow, an accomplished inventor based in Murrysville, PA, has made significant contributions to the field of electrical contact materials. With a remarkable portfolio of 19 patents, his inventions focus on enhancing the performance of electrical contacts through innovative manufacturing methods.

Latest Patents

Among his latest patents, Whitlow has developed a new class of low chop contact materials that utilize Ag-chromium carbide and Ag--Cr compositions. These innovative materials feature a microstructure that is essentially 100% dense and free from porosity. This design effectively combines the beneficial properties of Ag--WC and Cu--Cr contacts while eliminating their respective disadvantages. The manufacturing method involves cold pressing a mixture of Ag and chromium or chromium carbide, followed by elevated temperature infiltration of silver to achieve the desired microstructure.

Another noteworthy patent details a porosity-free electrical contact material created through a pressure cast method. Whitlow's invention allows for the production of a copper-chromium contact that is completely dense and devoid of deleterious porosity. The process involves pressurizing liquid copper to infiltrate an evacuated and lightly sintered chromium-based preform. The resulting electrical contact exhibits either a homogeneous or graded distribution of chromium, with varying concentrations across different layers.

Career Highlights

Whitlow has had a distinguished career, contributing his expertise to leading companies in the industry, including Westinghouse Electric Corporation and Eaton Corporation. His innovative work in electrical contact materials has garnered recognition and utility in a broad range of applications.

Collaborations

Throughout his career, Whitlow has collaborated with notable coworkers such as William R Lovic and Gerald Joseph Bruck. These partnerships have fostered an environment of innovation, contributing to the successful development of his patents and inventions.

Conclusion

Graham A Whitlow's advancements in electrical contact materials have significantly enhanced the effectiveness and reliability of electrical systems. His patents reflect a deep understanding of material science and engineering, paving the way for future innovations in the field. As he continues to refine and develop new technologies, his contributions will undoubtedly leave a lasting impact on the industry.