Sheppard Cohen

Title: Sheppard Cohen: A Pioneer in Glow Discharge Technology

Introduction

Sheppard Cohen is a notable inventor based in Danvers, MA, recognized for his significant contributions to the field of electrical engineering. With a total of 14 patents, Cohen's innovative work has impacted the design and operation of various electrical devices, particularly in the realm of gaseous discharge lamps.

Latest Patents

Cohen's latest inventions demonstrate his deep understanding of electrical systems. One key patent is the "Glow discharge starter having discharge extinguishing means." This invention comprises a glow bottle with a hermetically sealed discharge envelope containing an ionizable medium, featuring a bimetallic electrode and a counter electrode. A pair of conductors connect the electrodes to a radio frequency suppressing capacitor, which is thermally linked to the discharge envelope. This configuration allows the generated heat to create a short circuit within the capacitor when a predetermined temperature is reached, effectively extinguishing the glow discharge without requiring an additional fuse or thermal protector.

Another impactful patent is the "Starting circuit for gaseous discharge lamps." This invention presents a starting and operating circuit for gaseous discharge lamps, adeptly utilizing a ballast inductor and multiple pulse generators to ensure efficient functionality. The high-voltage pulse generator, employing a non-linear capacitor and a semiconductor bipolar thyristor (commonly known as SIDAC), is designed in parallel with the lamp, showcasing Cohen's innovative approach to electrical design.

Career Highlights

Cohen has had a remarkable career, working with notable companies such as GTE Products Corporation and GTE Sylvania Incorporated. His experience in these organizations has contributed to the development of innovative technologies that are used in various applications today.

Collaborations

Throughout his career, Cohen has collaborated with distinguished professionals, including Nikolaos Barakitis and Gregory Zaslavsky. These professional relationships have fostered creativity and allowed for the exchange of ideas that enhance the development of advanced electrical solutions.

Conclusion

Sheppard Cohen's work in the field of electrical engineering, particularly his advancements in glow discharge technology, demonstrates his innovative spirit and dedication to enhancing electrical systems. His 14 patents reflect a strong commitment to invention and improvement, paving the way for future developments in the industry.