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AssigneeNorthern Telecom Limited
InventorsMichael A. Shannon, Robert J. Howat
Estimating the term…
Monitoring of the quantity of magnetically permeable particles in a dry dielectric carrier layer surrounding a conductor by passing the conductor with its surrounding layer through a magnetic field created by a magnet to cause magnetic attraction between the particles and the magnet. The degree of this attraction is dependent partly upon the quantity of particles lying in the field and the degree of movement towards each other of the conductor and magnet is monitored while resisting this movement, to give an indication of the particle quantity. A method of controlling the quantity of particles is also described and which uses the monitored movement to produce signals by which the input of particles or carrier into a fluid mixture is adjusted.
A method of monitoring a quantity of magnetically permeable particles in a dry dielectric carrier layer surrounding a conductor comprising passing the conductor surrounded by the layer along a feedpath and through a magnetic field created by a magnet means to cause a magnetic attraction between the particles and the magnet means, the degree of which is dependent upon the strength of the magnetic field and the quantity of particles in the layer which are affected by the field, and monitoring the degree of relative movement towards each other of the conductor and magnet means as the conductor moves along its path, while applying a resisting force against such relative movement.
Dependencies are inferred from the claim text.