Thomas L Ratledge

Title: Innovations of Thomas L. Ratledge

Introduction

Thomas L. Ratledge is an accomplished inventor based in Carlsbad, California. He has made significant contributions to the field of welding technology, holding a total of 3 patents. His work focuses on enhancing the efficiency and precision of AC resistance welding systems.

Latest Patents

One of Ratledge's latest patents is titled "Line voltage compensation for AC resistance welding systems and the like." This invention introduces an AC line voltage compensation method and controller designed for use with AC welding systems. The system allows operators to input welding parameters suitable for the article being welded, along with a desired heating percentage that determines the RMS output voltage. The invention measures the AC line voltage supplied to the welding system and adjusts the timing of heat application based on the difference between the measured and desired nominal AC line voltage. This ensures that the RMS output voltage remains relatively constant across varying AC line voltages. Additionally, the invention incorporates a user-programmed digital control panel that allows operators to adjust the gain factor for line voltage compensation, enhancing the adaptability of the welding setup.

Another notable patent by Ratledge is "Pressure welding with closed loop force control." This invention features a parallel-gap welder that applies a precisely controlled force to the weld head using a solenoid. A load cell is integrated between the weld head and the solenoid plunger to provide feedback on the force applied. This feedback signal is utilized to control the current through the solenoid coil, ensuring that the applied force matches the command input. The design includes a universal joint connection to maintain an in-line driving force on the electrodes, thereby improving the welding process's accuracy.

Career Highlights

Thomas L. Ratledge has had a distinguished career at Hughes Aircraft Company, where he has contributed to various innovative projects. His expertise in welding technology has positioned him as a key figure in the development of advanced welding systems.

Collaborations

Throughout his career, Ratledge has collaborated with notable colleagues, including William M. Fries and William H. Hill. These partnerships have fostered a collaborative environment that has led to significant advancements in welding technology.

Conclusion

Thomas L. Ratledge's contributions to welding technology through his innovative patents demonstrate his commitment to enhancing industrial processes. His work continues to influence the field, showcasing the importance of innovation in engineering.