John H Francis

Title: Innovations of John H Francis

Introduction

John H Francis is a notable inventor based in Cheltenham, GB. He has made significant contributions to the field of engineering, particularly in fuel pumping apparatus and engine position transducer devices. With a total of 2 patents to his name, his work showcases innovative solutions for engine functionality.

Latest Patents

One of his latest patents is a fuel pumping apparatus designed to supply fuel to an engine. This apparatus features a pumping plunger that is reciprocable in a cylinder by a cam with lobes. During the engine's forward rotation, fuel is displaced by the leading flanks of the lobes as the plunger moves inward. A valve, which is electrically controlled by a system receiving plunger position signals, can be closed during this inward movement to allow fuel flow through an outlet to the engine. Notably, the valve opens when the engine rotates in reverse, enhancing the apparatus's versatility.

Another significant patent by Francis is an engine position transducer device. This device includes first and second discs that can be coupled to a rotary part of an engine. The first disc has a number of vanes equal to the number of engine cylinders, with leading edges equi-angularly spaced and trailing edges of varying lengths. The second disc features a larger number of equally spaced marks. Transducers are associated with these discs, and a signal processing device counts the marks that pass the transducer while a vane is in motion. This processing device can determine the engine's rotation direction, providing critical information for engine management.

Career Highlights

John H Francis has worked at Lucas Industries Public Limited Company, where he has been able to apply his innovative ideas in practical applications. His work has contributed to advancements in engine technology, making significant impacts in the automotive industry.

Collaborations

Throughout his career, Francis has collaborated with notable coworkers such as Nigel A Deller and Francis R Draper. These collaborations have likely fostered an environment of innovation and creativity, leading to the development of groundbreaking technologies.

Conclusion

John H Francis is a distinguished inventor whose work in fuel pumping apparatus and engine position transducer devices has made a lasting impact on engineering. His innovative patents reflect a commitment to enhancing engine performance and functionality.