Company Filing History:
Years Active: 1976
Title: Edsel W Johnson: Innovator in Cartridge Case Technology
Introduction
Edsel W Johnson is a notable inventor based in Gibsonia, PA (US). He is recognized for his contributions to the field of materials engineering, particularly in the development of improved cartridge cases. His innovative approach has led to advancements in the manufacturing processes of these essential components.
Latest Patents
Johnson holds a patent for an aluminum cartridge case. This invention involves an improved cartridge case fabricated from rod or bar stock formed from a specific alloy. The alloy contains, by weight, 5.2 to 6.2% Zn, 1.9 to 2.5% Mg, 1.2 to 1.9% Cu, and 0.18 to 0.25% Cr, with the remainder being essentially aluminum. The method of fabrication includes a controlled sequence of steps to prevent the formation of coarse recrystallized grains, which can lead to surface cracks during subsequent metalworking operations. The process involves segmenting the rod, annealing the parts, and forming them into cartridge cases through cupping and wall ironing procedures. Additionally, the mouth of the case can be annealed to facilitate the formation of a retaining groove around a projectile, enhancing resistance to stress corrosion cracking.
Career Highlights
Johnson's career is marked by his work at the Aluminum Company of America, where he has made significant contributions to the field of aluminum manufacturing. His expertise in alloy composition and fabrication techniques has positioned him as a key figure in the development of advanced materials for various applications.
Collaborations
Throughout his career, Johnson has collaborated with notable colleagues, including Ralph W Rogers, Jr and Charles H Deveney. These partnerships have fostered innovation and have contributed to the successful development of new technologies in the industry.
Conclusion
Edsel W Johnson's work in the field of cartridge case technology exemplifies the impact of innovative thinking in materials engineering. His patent for an aluminum cartridge case showcases his commitment to improving manufacturing processes and enhancing product performance. Johnson's contributions continue to influence the industry and inspire future innovations.