David H Cottey

Title: David H Cottey: Innovator in Coupled Cavity Travelling Wave Tubes

Introduction

David H Cottey is a notable inventor based in East Hanningfield, GB. He has made significant contributions to the field of microwave technology, particularly in the development of coupled cavity travelling wave tubes. With a total of 2 patents to his name, Cottey's work has advanced the capabilities of these essential devices.

Latest Patents

Cottey's latest patents include a method for manufacturing coupled cavity travelling wave tubes. This innovative approach involves a millimeter coupled cavity travelling wave tube where each slow wave structure is formed from at least one longitudinally extending member. The member features holes created through a hobbing process, which serve as cavities in the slow wave structure. In a preferred embodiment, a single longitudinally extending member is utilized, with each hole acting as a complete cavity. The hobbing process ensures that a buttress remains outstanding from each cavity facing surface of a cavity separating wall, with an axial beam hole bored through the member. After machining the cavity coupling holes, the cavities are sealed with plates brazed to the member's opposite faces.

Another of his patents details a method for fabricating coupled cavity travelling wave tubes. In this design, the slow wave structures are formed by a hobbing process, with each structure consisting of two individual halves extending the full length. Each half contains portions of cavities and beam holes, all formed in a single hobbing operation. Coupling holes between cavities are created through a separate process, and if ferrules or drift tubes are needed, the beam coupling holes are made oversized for brazing. The two halves of the slow wave structure are then united through furnace brazing.

Career Highlights

Cottey is associated with the English Electric Valve Company Limited, where he has applied his expertise in microwave technology. His innovative methods have contributed to the advancement of travelling wave tube technology, which is crucial for various applications in telecommunications and radar systems.

Collaborations

Throughout his career, Cottey has collaborated with notable colleagues, including Brian F Cooper and Peter Robert Davis. These partnerships have fostered a collaborative environment that has led to significant advancements in their field.

Conclusion

David H Cottey stands out as a prominent inventor in the realm of coupled cavity travelling wave tubes. His