Donald H Newhall

Title: The Innovations of Donald H. Newhall

Introduction

Donald H. Newhall is a notable inventor based in Norfolk, MA (US). He has made significant contributions to the field of engineering, particularly in the development of advanced calibration devices. With a total of 2 patents, his work has had a lasting impact on force measurement technologies.

Latest Patents

One of Newhall's latest patents is the Hydrostatic Primary Force Standard. This invention features a controlled clearance piston load cell that consists of a piston and pressure jacketed cylinder. Integral to its structure is a system of hydrostatic bearings that provide centering of the piston in the cylinder and alignment of the piston-to-cylinder interface. The geometry of the cylinder and pressure jacket is designed to create a controlled clearance constriction at a predetermined location. When paired with a controlled clearance dead weight piston gauge, this self-aligning load cell serves as a primary force standard for calibrating force-measuring devices.

Another significant patent is the Dynamic Pressure Calibrator. This device generates a high-pressure, short rise time pulse by first pressurizing a large chamber with a pressure fluid. An initially closed channel connects the large chamber to a small test chamber, which is closed except for the channel and to which one or more pressure gauges are attached. One gauge may serve as a standard to indicate pressure in the chamber, while another can be calibrated using the device. The channel is abruptly opened to release the high-pressure fluid from the large chamber to the small test chamber, allowing for rapid equalization of pressure and creating a high-pressure, short rise time pulse in the small chamber.

Career Highlights

Donald H. Newhall works for the US Government as represented by the Secretary of the Army. His role involves the development and implementation of innovative technologies that enhance measurement accuracy and reliability in various applications.

Collaborations

Throughout his career, Newhall has collaborated with notable colleagues, including James O. Pilcher and Charles D. Bullock. These partnerships have contributed to the advancement of his inventions and the overall progress in the field.

Conclusion

Donald H. Newhall's contributions to engineering and measurement technology are significant. His innovative patents, including the Hydrostatic Primary Force Standard and Dynamic Pressure Calibrator, showcase his expertise and commitment to advancing the field. His work continues to influence the calibration of force-measuring devices, ensuring accuracy