John M Randall

Title: Innovations of John M. Randall

Introduction

John M. Randall is a notable inventor based in Fairport, NY (US). He has made significant contributions to the field of electrical engineering, particularly in power supply circuits and static elimination technologies. With a total of 3 patents, Randall's work has had a lasting impact on various applications, especially in xerographic machines.

Latest Patents

One of Randall's latest patents is a power supply topology that enables bipolar voltage output from a single source. This innovative power supply circuit converts an A.C. signal into an output signal that combines both A.C. and D.C. voltage components. The circuit employs a voltage doubler topology with transistors, which are controlled by waveform generators that produce a series of pulses. By adjusting the duty cycle of these pulses, the appropriate D.C. voltage components can be formed, allowing for the adjustment of the required A.C. signal. This technology is particularly useful for a scavengeless developer in a xerographic machine, which requires three bias voltage inputs.

Another significant invention by Randall is a static eliminator designed to neutralize static electric charges on surfaces. This device comprises a support means and a plurality of resilient, flexible thin fibers with specific electrical resistivity. The fibers are arranged in a brush-like configuration, extending toward the surface that needs to be neutralized. The fibers are preferably made of partially carbonized polyacrylonitrile, making them effective in electrostatographic reproducing machines.

Career Highlights

John M. Randall has had a distinguished career at Xerox Corporation, where he has been instrumental in developing innovative technologies that enhance the functionality of xerographic machines. His expertise in electrical engineering and his inventive spirit have led to advancements that improve efficiency and performance in various applications.

Collaborations

Throughout his career, Randall has collaborated with notable colleagues, including William S. Franks, Jr. and Joseph A. Swift. These collaborations have fostered an environment of innovation and creativity, contributing to the success of their projects.

Conclusion

John M. Randall's contributions to the field of electrical engineering through his patents and innovations have made a significant impact on technology, particularly in xerographic applications. His work continues to influence the industry and inspire future innovations.