Takumi Funahashi

Title: Takumi Funahashi: Innovator in Vacuum Switch Technology

Introduction

Takumi Funahashi is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of vacuum switch technology. With a total of 4 patents to his name, Funahashi's work has had a considerable impact on the industry.

Latest Patents

One of his latest patents is a method for processing vacuum switches. This invention involves a vacuum switch that features two main electrodes encased in a vacuum vessel, designed to operate in opening and closing the main electrodes. A contact piece made of a copper-chromium alloy is secured or formed on at least one of the main electrodes. The operational properties of the main electrodes are significantly enhanced by flowing and interrupting an electric current of a predetermined current density multiple times through the two main electrodes. This process improves the surface condition of the contact piece by forming a recrystallized layer over its outer surface.

Another significant patent is a DC circuit breaker that utilizes a blown arc-extinguishing gas. This innovative design allows for the reliable and fast interruption of DC currents by providing arc extension current paths. These paths are relatively long and bent after the arc-extinguishing gas interacts with the arc. The arc is formed to extend for a long distance in a loop configuration, and an auxiliary electrode is used to short-circuit the extended arc, with one auxiliary electrode provided for each extension current path.

Career Highlights

Throughout his career, Takumi Funahashi has worked with prominent companies, including Tokyo Shibaura Denki Kabushiki Kaisha and Toshiba Corporation. His experience in these organizations has contributed to his expertise in electrical engineering and innovation.

Collaborations

Funahashi has collaborated with notable colleagues such as Satoru Yanabu and Tohoru Tamagawa. Their joint efforts have further advanced the field of vacuum switch technology.

Conclusion

Takumi Funahashi's contributions to vacuum switch technology and electrical engineering are noteworthy. His innovative patents and collaborations reflect his dedication to advancing the industry. His work continues to influence the development of reliable electrical components.