Howard R Shaffer

Title: Howard R. Shaffer: Innovator in Circuit Breaker Technology

Introduction

Howard R. Shaffer is a notable inventor based in Westminster, MD (US). He has made significant contributions to the field of electrical engineering, particularly in circuit breaker technology. With a total of 3 patents, his work has had a lasting impact on safety and efficiency in electrical systems.

Latest Patents

One of Shaffer's latest patents is for an "Anti-rebound latch for current limiting switches." This innovation involves a multipole circuit breaker constructed with a single rod that pivotally mounts all movable contact arms to a common one-piece molded insulating carrier. Individual torsion springs engage each contact arm to provide necessary contact pressure when the circuit breaker is closed. Under severe overcurrent conditions, electrodynamic blowoff forces can cause significant contact separation, similar to that which occurs when the circuit breaker is normally opened. To prevent rebound reclosing after electrodynamic opening, an individual anti-rebound pin engages the contact arm of each pole. A camming mechanism on the carrier allows for manual closing of the contacts.

Another significant patent is for an "Interlock means for switch enclosure." This invention features an electric switch mounted within an enclosure that has a hinged cover. The switch can be manually operated from outside the enclosure by a handle mechanism secured to it. The cover includes a single aperture that provides clearance for the U-shaped operating handle when closed, as well as a catch that holds the cover closed. The mechanism incorporates a defeatable cover interlock to prevent opening the cover when the switch is closed, and a defeatable switch interlock to prevent closing the switch when the cover is open.

Career Highlights

Throughout his career, Howard R. Shaffer has worked with several prominent companies, including ITE Imperial Corporation and Gould Inc. His experience in these organizations has contributed to his expertise in electrical engineering and innovation.

Collaborations

Shaffer has collaborated with notable individuals in his field, including Frank W. Kussy and G. Erich Heberlein, Jr. These collaborations have further enriched his work and contributions to electrical safety technologies.

Conclusion

Howard R. Shaffer's innovative patents and career achievements highlight his significant role in advancing circuit breaker technology. His contributions continue to influence the safety and efficiency of electrical systems today.