This inventor holds 2 USPTO granted patents. Top assignees: Southwest Research Institute, Other. Active years: 1988.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
1 out of 1,126 
1 out of 834,513 Years Active: 1988
Title: Innovations of John P Harrell, Jr.
Introduction
John P Harrell, Jr. is an accomplished inventor based in San Antonio, TX (US). He holds a total of 2 patents that showcase his innovative contributions to technology. His work primarily focuses on methods and systems that enhance the functionality and safety of mechanical devices and electrical systems.
Latest Patents
One of his latest patents is a method for utilizing a spherical dipole probe for detecting faults in high voltage transmission line insulators. This method employs a nonintrusive, noncontacting electric field sensing device to identify faults in insulators. The electric field surrounding an unfaulted insulator is mapped using a spherical dipole to create a characteristic reference curve. The field of a suspect insulator is then mapped to generate a test curve, which is compared with the reference curve to determine the existence and location of any faults.
Another significant patent is a position sensor and system designed for a moving member of a mechanical device. This sensor incorporates an optical sensing mechanism, such as a solid-state image sensor, along with illuminating means like light-emitting diodes. These components are stationarily mounted to face scribing marks on the moving member. The microprocessor-controlled image sensor produces a digital signal that represents the scribing marks, which is transmitted to a remote digital computer. This computer applies control signals to the sensor and processes the digital signal, generating an alarm if the movement exceeds a predetermined threshold.
Career Highlights
Throughout his career, John P Harrell, Jr. has worked with notable organizations, including the Southwest Research Institute. His experience in these companies has contributed to his development as an inventor and innovator in his field.
Collaborations
He has collaborated with several professionals, including James J Polonis and Melvin J Johnson, who have contributed to his projects and innovations.
Conclusion
John P Harrell, Jr. exemplifies the spirit of innovation through his patents and contributions to technology. His work continues to impact the fields of electrical engineering and mechanical systems.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile