Location History:
- Birmingham, GB (1982)
- Cirencester, GB (1984)
Company Filing History:
Years Active: 1982-1984
Title: John H Francis: Innovator in Linear Inductive and Displacement Transducers
Introduction
John H Francis is a notable inventor based in Birmingham, GB. He has made significant contributions to the field of transducer technology, holding a total of 2 patents. His work focuses on innovative solutions that enhance the functionality and accuracy of linear inductive and displacement transducers.
Latest Patents
John H Francis's latest patents include the development of a linear inductive transducer and a linear displacement transducer. The linear inductive transducer features a non-magnetic former with a bore that allows a core made from magnetic material to slide. This core is moved axially by the component whose position is to be sensed. The former is designed with three circumferential grooves housing coils that form the transducer winding, with inductance varying based on the core's axial position. Additionally, a temperature-responsive resistor is integrated into a resistance network that includes the winding, allowing for precise monitoring of inductance through a step voltage application.
The linear displacement transducer consists of a first elongated magnetizable member with parallel pole pieces and windings. A second elongated member, which is shorter than the first, moves linearly relative to it, maintaining a constant gap. This design varies the magnetic coupling between the windings when an alternating current signal is applied, enhancing the transducer's performance.
Career Highlights
John H Francis is currently associated with Lucas Industries Limited, where he continues to innovate in the field of transducer technology. His work has been instrumental in advancing the capabilities of linear inductive and displacement transducers, making them more efficient and reliable.
Collaborations
Throughout his career, John has collaborated with notable colleagues, including John P Vernon and John Howard Moore. These collaborations have contributed to the development of advanced technologies in their respective fields.
Conclusion
John H Francis is a distinguished inventor whose work in linear inductive and displacement transducers has made a significant impact on the industry. His innovative patents and contributions continue to shape the future of transducer technology.