This inventor holds 5 USPTO granted patents and 1 EPO patent. Top assignees: Thyssen Elevator Capital Corp., Thyssenkrupp Elevator Capital Corporation. Active years: 2003-2005.
Company Filing History:
4 out of 25 
1 out of 13 Years Active: 2003-2005
Title: The Innovative Contributions of Robert H. Sweet
Introduction
Robert H. Sweet is a notable inventor based in Lakeside, California, recognized for his significant contributions to elevator technology. With a total of five patents to his name, Sweet has developed innovative solutions that enhance the efficiency and safety of elevator systems.
Latest Patents
One of Sweet's latest patents is the "Autobalance Roping and Drive Arrangement." This invention provides an autobalancing mechanism for elevators, which continuously balances the weight of the elevator cab and the counterweight. By minimizing the force required by the drive motor to move the cab, this arrangement improves energy efficiency. The system utilizes a weighting device connected to a drive sheave, which imparts a downward force, creating traction contact between the drive sheave and the drive rope. This innovative design ensures that the elevator remains balanced, compensating for any weight differences between the cab and the counterweight.
Another significant patent is the "Apparatus for Testing Aramid Fiber Elevator Cables." This invention introduces a method for inspecting and calculating the residual strength of aramid fiber ropes used in elevators. The apparatus includes a transmitter that introduces an acoustic wave along the rope, with multiple receivers capturing the wave after it traverses a designated section. The data collected allows for the calculation of wave velocity, modulus, and residual strength, ensuring timely replacement of the rope when necessary.
Career Highlights
Throughout his career, Robert H. Sweet has worked with prominent companies in the elevator industry, including Thyssen Elevator Capital Corp. and Thyssenkrupp Elevator Capital Corporation. His experience in these organizations has contributed to his expertise in elevator technology and innovation.
Collaborations
Sweet has collaborated with notable professionals in the field, including James A. Nickerson and Michael A. Palazzola. These partnerships have fostered a collaborative environment that encourages the exchange of ideas and advancements in elevator technology.
Conclusion
Robert H. Sweet's innovative patents and contributions to elevator technology demonstrate his commitment to enhancing safety and efficiency in the industry. His work continues to influence the development of modern elevator systems, making him a significant figure in the field of invention.