This inventor holds 5 USPTO granted patents. Top assignees: Orion Electric Company, Ltd., Rca Inc.. Active years: 1976-1998.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1976-1998
Title: Francis Joseph Campbell: Innovator in Electron Gun Technology
Introduction
Francis Joseph Campbell is a notable inventor based in Yardley, PA (US). He has made significant contributions to the field of electron gun technology, holding a total of 5 patents. His work has been instrumental in advancing the design and functionality of color picture tubes.
Latest Patents
One of Campbell's latest patents is an improved electron gun for a color picture tube. This invention features a main lens with a first rim electrode that has a beam passing plane with holes on the incident side of the electron beam. It also includes a second rim electrode facing the first, which has a beam passing plane with holes on the departing side of the beam. A focusing electrode is positioned adjacent to the first rim electrode, which helps form compensating astigmatism quadrupole lenses. This design effectively reduces astigmatism formed between the first and second rim electrodes of the main lens.
Another significant patent by Campbell is also an improved electron gun for a color picture tube. This version includes a triple electrode part and a prefocusing lens part that preliminarily focuses and accelerates the electron beam. The prefocusing lens part comprises multiple focusing lenses that form at least one quadrupole lens. Two different focusing voltages are dynamically changed in synchronization with the deflection signal, allowing for a uniform beam section across the screen.
Career Highlights
Throughout his career, Campbell has worked with prominent companies such as Orion Electric Company, Ltd. and RCA Inc. His experience in these organizations has contributed to his expertise in the field of electron gun technology.
Collaborations
Some of Campbell's notable coworkers include William H. Barkow and Sung-youb Jung. Their collaboration has likely fostered innovation and development in their respective projects.
Conclusion
Francis Joseph Campbell's contributions to electron gun technology have had a lasting impact on the industry. His innovative patents and collaborations with esteemed colleagues highlight his dedication to advancing technology in color picture tubes.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile