John A Letchford

Title: John A Letchford: Innovator in Lighting Technology

Introduction

John A Letchford is a notable inventor based in Enfield, GB. He has made significant contributions to the field of lighting technology, holding a total of 4 patents. His work primarily focuses on innovative solutions that enhance the efficiency and functionality of lighting systems.

Latest Patents

One of Letchford's latest patents is the tungsten halogen lamp. This invention produces infrared radiation, making it suitable for applications such as cooking or heating. The lamp features an envelope made of high silica content material, which is sealed at each end by a pinch seal. The gas fill operates at a room temperature pressure of 250-750 mm Hg. Notably, a portion of the envelope at each end is clear, while the rest contains an opacifier that reduces the transmission of visible light. A suitable opacifier is red, created by the reduction of copper oxide dispersed in the high silica content material. The envelope is produced by butt joining clear end sections with a tube of material containing the opacifier.

Career Highlights

Throughout his career, John A Letchford has worked with prominent companies, including Thorn EMI Plc and Thorn EMI Domestic Appliances Limited. His experience in these organizations has allowed him to develop and refine his innovative ideas in lighting technology.

Collaborations

Letchford has collaborated with several talented individuals in his field, including Alex L Halberstadt and Kenneth S Frost. These partnerships have contributed to the advancement of his inventions and the overall progress in lighting technology.

Conclusion

John A Letchford's contributions to the field of lighting technology through his patents and collaborations highlight his innovative spirit and dedication to improving everyday solutions. His work continues to influence the industry and inspire future inventors.