Cambridge Consultants Limited

Coal Industry (patents) Limited

Gordon K Oswald

Alan Trevor Richardson

Thomas William Lawrence

Christopher S Neal

Per A Uisi

Elizabeth A Orme

Method of an apparatus for detecting the displacement of a target

A method and apparatus for detecting fluid level in a tank in the vicinity of a transmission line (1), the fluid level being such as to cause reflection of a signal transmitted along the transmission line. The method includes the steps of:

Method and apparatus for determining a fluid level in the vicinity of a

System for sensing the approach of a moving missile to a target

A directional antenna for an electromagnetic sensing system comprises a generally cylindrical tube of electrically-conductive material a portion of the tube being cut away to define a transversally-facing window. The non-cut away portion of the tube provides a backing shield for a pair of antenna elements mounted on a generally `V`-shaped support. A cover of dielectric material is arranged over the antenna elements.

Borehole located directional antennae means for electromagnetic sensing

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Huntingdon, United Kingdom

Gordon K Oswald