Joseph G Nield, Jr

Title: Joseph G Nield, Jr: Innovator in Electronic Motor Protection Systems

Introduction

Joseph G Nield, Jr. is a notable inventor based in Cumberland, RI (US). He has made significant contributions to the field of electronic motor protection, holding a total of 5 patents. His work focuses on enhancing the safety and efficiency of electric motors through innovative designs and systems.

Latest Patents

One of Nield's latest patents is an electronic motor protection system. This system is designed to protect electric motors against various fault conditions, such as over-temperature of the individual windings and low voltage. The system features a power supply compatible with 24, 120, or 240 VAC input voltage, utilizing only two input terminals. In the first embodiment, line voltage is inputted to a transformer, while a combination of a zener follower and series regulator provides independent DC voltage supply levels for control circuitry over a wide range of input voltages. A dead-band voltage range is incorporated to prevent chatter in 240V motors and excessive voltage from being applied to 120V motors. The motor is safeguarded by an output relay that de-energizes upon detecting a fault condition, stabilizing the load seen by the power supply transformer. In a second embodiment, input voltage levels are detected by comparator circuitry, which switches contacts of a relay to adjust the transformer windings based on the input voltage.

Another significant patent is a thermally actuatable auxiliary electrical switch apparatus. This device is used with refrigerator compressor systems and features a U-shaped bimetallic element mounted on a base plate. A thermal generator provides heat to the bimetallic element, causing it to deflect and switch out the solid-state starter while the compressor motor remains energized.

Career Highlights

Joseph G Nield, Jr. is currently employed at Texas Instruments Corporation, where he continues to innovate and develop new technologies. His work has had a lasting impact on the field of electronic motor protection, showcasing his expertise and dedication to improving electrical systems.

Collaborations

Throughout his career, Nield has collaborated with notable coworkers, including John R D'Entremont and Alfred Raulino. These partnerships have contributed to the advancement of his projects and the successful development of his patents.

Conclusion

Joseph G Nield, Jr. is a distinguished inventor whose work in electronic motor protection systems