Ceravision Limited

Itw Limited

Floyd Pothoven

Andrew Simon Neate

Donald M Wilson

Charles Guthrie

Robin Devonshire

Barry Preston

Edwin Charles Odell

Terry A Pothoven

Martyn Roscoe

Eddie Odell

A method of applying a Faraday cage to a lucent resonator, the resonator having a void containing microwave-excitable material and being adapted for microwave resonance in the resonator and within the Faraday cage for driving a light emitting plasma in the void, the method consisting in the steps of: deposition of a conductive material onto the lucent resonator; applying, patterning and developing a photoresist material over the conductive material to leave the conductive material exposed where it is not required; removing the conductive material where not required and the photoresist material from the required conductive material, leaving a reticular network of conductive material providing a Faraday cage and depositing a layer of protective material over the cage of conductive material.

Method of applying a faraday cage onto the resonator of a microwave light source

Operation to produce an intermediate product for a crucible for a LUWPL is as follows:

Crucible structure for plasma light source and manufacturing method

The manufacture of an electrodeless bulb involves one end of a tube closed off, and a first neck is formed in the tube close to the closed end. A second neck is formed in the tube, close to the still open end; a metal halide pellet of known size is dropped into the tube and the tube is evacuated. With the vacuum being maintained heat is applied to the closed end, causing the metal halide pellet to sublime and with it the impurities. The impurities are drawn off, the vacuum being maintained and the metal halide condenses in the tube between the necks. Once the tube is cool, the evacuation is discontinued and the tube is refilled with noble gas and the quartz tube is sealed off at the second neck.

Method of manufacturing an electrode-less incandescent bulb

A method of making an electrodeless incandescent bulb comprises the steps of:

Electrode-less incandescent bulb

A lamphas a bodyof sintered alumina ceramic material and an artificial sapphire window. The bodyis initially molded in green state and the window is pressed into a front recess. The combination is fired at a temperature of the order of 1500&#xb0; C., to fuse the body into a coherent pressure-tight state with the window. After partial cooling to the order of 600&#xb0; C., a pellet of excitable material is added through a rear, charging aperture. A discof ceramic with fritis placed over the aperture. The disc is irradiated by laser to fuse the frit and the disc to the body, thus sealing the excitable material into the lamp.

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Lakewood, CA, United States of America

Floyd Pothoven