This inventor holds 2 USPTO granted patents. Top assignees: Cutler-Hammer, Inc., Eaton Corporation. Active years: 1977-1980.
Company Filing History:
Years Active: 1977-1980
Title: The Innovations of Robert O. Graham
Introduction
Robert O. Graham is a notable inventor based in Milwaukee, WI (US), recognized for his contributions to electrical engineering. He holds 2 patents that showcase his innovative approach to enhancing electrical devices. His work has significantly impacted the design and functionality of electrical components.
Latest Patents
One of Graham's latest patents is for a contactor having higher fault current withstandability. This invention involves an electric power switch or contactor of the 3-pole AC type, designed to withstand higher fault currents, such as short circuit currents. The insulating contact carrier is equipped with integrally molded stops that allow the spring-biased bridging contacts to be slightly opened by high electro-dynamic forces during fault conditions. This design prevents the arc from moving to other parts of the contactor, thereby reducing destructive effects and allowing for reuse with minor repairs.
Another significant patent is for a three-phase current transformer. This unitary transformer features three iron cores and three secondary coils enclosed within molded housing halves. The design includes juxtaposed slots for clamping secondary coil terminal inserts, facilitating connections to external conductors. The housing halves are secured with symmetrically arranged screws, and the assembled structure provides apertures for bus bars that serve as one-turn primary windings. This innovative design enhances the efficiency and reliability of the transformer.
Career Highlights
Throughout his career, Robert O. Graham has worked with prominent companies such as Cutler-Hammer, Inc. and Eaton Corporation. His experience in these organizations has contributed to his expertise in electrical engineering and innovation.
Collaborations
Graham has collaborated with notable coworkers, including John A. Rauenbuehler and Albert C. Snowdon. Their collective efforts have fostered advancements in electrical technology and design.
Conclusion
Robert O. Graham's contributions to electrical engineering through his patents and career achievements highlight his innovative spirit and dedication to improving electrical devices. His work continues to influence the industry and inspire future inventors.