Raymond C Hawkins

Title: The Innovations of Raymond C. Hawkins

Introduction

Raymond C. Hawkins is a notable inventor based in Minneapolis, MN (US). He has made significant contributions to the field of electrically driven apparatus, holding 2 patents that showcase his innovative spirit and technical expertise.

Latest Patents

One of his latest patents is for a Multi-speed drive with forward/reverse lockout. This invention improves electrically driven floor maintenance apparatus by allowing for varying speeds of the driving motors. The design includes two speed ranges, which can be switched from series for low speed to parallel for high speed. Additionally, it features intermediate speeds achieved by placing resistors in series with the motors. The patent also incorporates time delay circuitry to prevent immediate operation in high speed until the vehicle has had time to accelerate. Furthermore, it includes mechanisms to detect the vehicle's direction and prevent operation in the opposite direction until it has slowed down. A deadman control is also integrated to ensure the drive motors are not energized when the operator is not seated.

Another significant patent by Hawkins is the Control circuit for reversible electric motors. This invention provides a method for controlling the direction of a reversible electric motor. The circuitry ensures that the current cannot be reversed while the motor is still operating in one direction. Once the motor slows to a near-stop condition, the circuitry allows for the voltage to operate in the opposite direction, effectively reversing the motor. This control apparatus may also include components that allow the motor to function as a generator when not electrically driven, along with a solid-state sensor and a lock-out circuit for enhanced safety.

Career Highlights

Raymond C. Hawkins is currently associated with Tennant Company, where he continues to innovate and develop new technologies. His work has significantly impacted the efficiency and safety of electric motor operations in various applications.

Collaborations

Throughout his career, Hawkins has collaborated with notable colleagues, including Donald J. Haub and Howard N. Seim. These collaborations have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Raymond C. Hawkins is a distinguished inventor whose contributions to electric motor technology have paved the way for advancements in the field. His patents reflect a commitment to innovation and safety, making him a valuable asset to the engineering community.