British Nuclear Fuels Plc

Reliance Gear Company Limited

John Raymond Gibson

Stephen Taylor

Joseph William Spencer

Keith Woolley

Perminder Tony Singh

Donald Matthew Burns

Gary Jones

Gordon Rees Jones

Robert McAlpine Dickson

Apparatus and method to improve the filtering action of a quadrupole mass filter by reducing a precursor fault caused by an asymmetric electrical field between a pair of opposing electrode rods in a y-axis of the quadrupole mass filter. Processing means for processing detector data determine the filtering action of the quadrupole mass filter by checking for a precursor fault. If a precursor fault is detected then power supply control means introduce an AC potential difference across the electrode rods in the y-axis in order to reduce asymmetry in the electrical field in the y-axis.

Quadrupole mass filter

The contents of a container are non-intrusively monitored by probing the container with an ultrasonic signal, and measuring changes in the ultrasound signature of the received signal after the signal has passed through the contents of the container.

Monitoring the contents of a container by ultrasonic means

Growing community of inventors

Liverpool, United Kingdom

John Raymond Gibson