Company Filing History:
Years Active: 1995
Title: James C Harper: Innovator in Ballast Circuit Technology
Introduction
James C Harper is a notable inventor based in Reno, NV (US). He has made significant contributions to the field of electrical engineering, particularly in the design of ballast circuits for fluorescent lamps. His innovative approach has led to the development of a unique circuit that enhances the efficiency and reliability of lighting systems.
Latest Patents
James C Harper holds a patent for an "Inverter ballast circuit featuring current regulation over wide lamp." This invention is characterized by a minimal number of components, which simplifies the design while maintaining functionality. The ballast circuit is designed to drive fluorescent lamps, ensuring that the load current is regulated to within 10% for selected maximum wattage fluorescent lamp loads, such as 18 or 36 watts. The transformer used in this circuit has a high voltage secondary winding that provides a reflected impedance significantly greater than that of the worst-case fluorescent lamp wattage load. This innovative design also includes features such as passive short circuit protection, filament current reduction after lamp strike, and cold temperature start-up capabilities.
Career Highlights
James C Harper is associated with Bruce Industries, Inc., where he applies his expertise in electrical engineering to develop advanced lighting solutions. His work has been instrumental in improving the performance and safety of fluorescent lighting systems. With a focus on innovation, Harper continues to push the boundaries of technology in his field.
Collaborations