David B Fenneman

Title: Innovations of David B Fenneman

Introduction

David B Fenneman is an accomplished inventor based in King George, VA (US). He has made significant contributions to the field of electrical engineering, particularly in the development of advanced capacitors and measurement devices. With a total of 5 patents to his name, Fenneman's work showcases his innovative spirit and technical expertise.

Latest Patents

One of Fenneman's notable inventions is the liquid filled variable capacitor. This device, also known as a PFL, provides variable frequency impedance and pulse length without the need to change the hardware. The capacitor is constructed from two or more conducting surfaces separated by a dielectric fluid mixture. A fluid supply system allows for the adjustment of the dielectric constant of the fluid, thereby altering the capacitor's operating characteristics. This system includes a mixing tank that combines high and low dielectric constant fluids to achieve the desired mixture. Additionally, a pump and heat exchanger are employed to manage the fluid's temperature.

Another significant patent is the apparatus for measuring the intrinsic time constant of liquids, referred to as a 'taumeter'. This device applies a predetermined voltage between a pair of electrodes immersed in the liquid. It measures the time taken for the voltage to decay from one predetermined value to another. The taumeter utilizes comparator logic to produce a gate pulse, which is then used to count zero crossings of a precise system clock, ultimately determining the intrinsic time constant of the liquid.

Career Highlights

Fenneman's career is marked by his role at the USA as represented by the Secretary of the Navy. His work has been instrumental in advancing technologies that have practical applications in various fields, including military and industrial sectors.

Collaborations

Throughout his career, Fenneman has collaborated with notable colleagues such as Robert J Geres and Ronald J Gripshover. These partnerships have contributed to the successful development and implementation of his innovative ideas.

Conclusion

David B Fenneman's contributions to the field of electrical engineering through his patents and inventions highlight his role as a significant innovator. His work continues to influence advancements in technology and engineering practices.