Company Filing History:
Years Active: 1979
Title: The Innovations of John A Christensen
Introduction
John A Christensen is a notable inventor based in Niles, Illinois. He is recognized for his contributions to the field of electron gun technology, particularly in the design of devices used in color cathode ray tubes. His innovative work has had a significant impact on the television display industry.
Latest Patents
Christensen holds a patent for a "Tetrode section for a unitized, three-beam electron gun." This invention is specifically designed for use in color cathode ray tubes of the small-neck, shadow-mask type. The electron gun design is also applicable to other television cathode ray tube displays that require a gun capable of providing small, symmetrical spots of uniform cross-section. The tetrode section generates at least one electron beam and a crossover that is imaged on the screen of the tube, focused by the main focus lens. The design features a strong prefocus, which bends the electron trajectories before they exit the tetrode section. This innovative approach helps to suppress spherical aberration, a common issue in highly refractive tetrode section designs.
Career Highlights
Christensen has made significant strides in his career, particularly while working at Zenith Radio Corporation. His work has contributed to advancements in television technology, enhancing the quality and performance of cathode ray tubes. His patent reflects his expertise and innovative thinking in the field of electron gun design.
Collaborations
Throughout his career, Christensen has collaborated with notable colleagues, including Peter E Loeffler and James W Schwartz. These collaborations have likely contributed to the development and refinement of his inventions.
Conclusion
John A Christensen's contributions to the field of electron gun technology exemplify the spirit of innovation. His patent for the tetrode section has paved the way for advancements in television display technology. His work continues to influence the industry, showcasing the importance of inventive thinking in technological progress.