William D Hall

Title: The Innovative Contributions of William D Hall

Introduction

William D Hall is a notable inventor based in Deerfield, NH (US). He has made significant contributions to the field of leak testing technology, particularly through his innovative patent. His work has implications for various industries that require precision in hermetically sealed components.

Latest Patents

William D Hall holds a patent for a "Sealed parts leak testing method and apparatus for helium spectrometer." This invention involves small, hermetically sealed pans that are leak tested after being subjected to an environment of trace gas such as helium. The testing process is crucial as the pans may lose their helium charge due to rapid escape from gross leaks. Hall's method employs a non-helium expansion technique, which, when used with a helium mass spectrometer leak detector, allows for reliable and automatic gross and fine leak testing of the pans using a single apparatus. The test pan is placed in a sealed test fixture, and a valve between the test fixture and an expansion chamber is opened. The pressure in the expansion chamber is measured after the valve is opened. If the measured pressure is less than a reference pressure, it indicates a leaking test pan. For sealed test pans, a helium mass spectrometer leak test is performed to detect fine leaks.

Career Highlights

William D Hall has worked at Varian Associates, Inc., where he has applied his expertise in leak testing technology. His innovative approach has contributed to advancements in the reliability of hermetically sealed devices.

Collaborations

Throughout his career, Hall has collaborated with notable colleagues, including David G Mahoney and Glenn E Ruiz. These collaborations have likely enriched his work and contributed to the development of effective leak testing solutions.

Conclusion

William D Hall's contributions to leak testing technology exemplify the importance of innovation in ensuring the reliability of hermetically sealed components. His patent reflects a significant advancement in the field, showcasing his expertise and dedication to improving testing methods.