Company Filing History:
Years Active: 1976-1983
Title: The Innovations of John R. Sherwood: A Patent History
Introduction
John R. Sherwood, a notable inventor based in Arlington, VA, has made significant contributions to the field of electrical engineering with a focus on ground monitoring systems. With five patents to his name, he continues to push the boundaries of innovation, specifically in the area of electrical cable safety and monitoring.
Latest Patents
Sherwood's latest innovations include two pivotal patents that enhance the safety and functionality of electrical power cables. The first, the "Ground Conductor Monitoring System," is designed to continuously monitor the ground conductor of an electrical cable that includes both power conductors and a pilot wire. This advanced monitoring system employs a loop with the ground conductor and pilot wire, alongside a terminating impedance, to ensure a reliable check of the test signal's magnitude using a current transformer. This setup negates the need for large, expensive blocking impedances.
The second patent, the "Ground Monitoring System," focuses on ensuring the integrity of ground connections in electrical power cables commonly used in surface mining. By establishing a complete conductive loop between the ground conductors and a pilot wire, this monitoring circuit detects any deviations in resistance and reactance characteristics. Through sophisticated comparisons of voltage and current samples, any anomalies prompt the activation of a trip relay, which subsequently opens circuit breakers to eliminate potential hazards.
Career Highlights
As an inventor at AMF GmbH, Sherwood has demonstrated a commitment to enhancing electrical safety through innovative solutions. His work in developing efficient monitoring systems is recognized within the industry, showcasing his ability to address complex engineering challenges with practical inventions.
Collaborations
While specific collaboration details are not publicly available, Sherwood's role in AMF GmbH suggests engagement with other talented engineers and researchers in electrical engineering. By working alongside a skilled team, he contributes to the development and refinement of cutting-edge technologies that prioritize safety and efficiency in electrical power systems.
Conclusion
John R. Sherwood's contributions to electrical engineering through his patented inventions exemplify how innovative thinking can lead to significant advancements in safety and monitoring solutions. His work not only enhances operational safety in mining and electrical applications but also reflects a broader commitment to improving technology navigation in the field.