Roy W Chapel, Jr

Title: The Innovations of Roy W Chapel, Jr.

Introduction

Roy W Chapel, Jr. is a notable inventor based in Edmonds, WA (US). He has made significant contributions to the field of electrical engineering, particularly in the development of advanced resistor technologies. With a total of five patents to his name, Chapel's work has had a lasting impact on the industry.

Latest Patents

One of his latest patents is a "Compound Resistor Manufacturing Method." This invention relates to a process of manufacturing and adjusting a compound resistor. The compound resistor is formed of a resistive material that constitutes a predominant portion of the resistance and has a small negative temperature coefficient of resistance. This is coupled with an adjustment material that possesses an extremely low resistance and a very high positive temperature coefficient of resistance. After forming the resistive and adjustment portions, a portion of the adjustment material is removed to adjust the composite temperature coefficient of resistance (TCR) of the compound resistor substantially to zero without significantly affecting resistance.

Another significant patent is the "Resistor Network Having Bi-Axial Symmetry." This resistive network is formed on a substrate and includes film resistors made of resistive elements. Each element has a plurality of portions symmetrically disposed relative to two axes of symmetry. The biaxially symmetric arrangement provides uniform resistance characteristics for the various film resistors, thus improving the stability of resistance ratios among resistors of the network. The TCR tracking for the film resistors, which refers to the TCR of a ratio of the resistors, is similarly improved. When the elements of different resistors of the network are interleaved, the temperature of the different resistors is also made more uniform.

Career Highlights

Chapel has worked with several companies throughout his career, including John Fluke Manufacturing Company, Inc. His experience in these organizations has contributed to his expertise in resistor technology and innovation.

Collaborations

Some of his notable coworkers include David N Duperon and I Macit Gurol. Their collaboration has likely fostered an environment of innovation and creativity in their respective projects.

Conclusion

Roy W Chapel, Jr. is a distinguished inventor whose work in resistor technology has paved the way for advancements in electrical engineering. His patents reflect a deep understanding of materials and their properties, contributing to more efficient and stable electronic components.