Method of production of dielectric insulation layers upon electrical conductors
AssigneeNorthern Telecom Limited
InventorsJohn N. Garner, Michael A. Shannon
Life of this patent
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Abstract
Method of monitoring net magnetic bipolar orientation of magnetically permeable particles in a dry dielectric carrier layer around an electrical conductor by passing the layer covered conductor through a magnetic field to cause particle orientation to affect the magnetic flux strength in the field. Electromotive force or current induced in a sensing conductor placed in the field is affected by the flux strength of the field. Sensing any change in this induced property indicates a change in the net magnetic bipolar orientation.
Claims8
A method of monitoring net inherent bipolar orientation of magnetically permeable particles in a dry dielectric carrier layer surrounding an electrical conductor comprising:
- passing the conductor carrying the layer through a magnetic field to cause the orientation of the particles to affect the magnetic flux strength in at least one certain part of the field;
- and
- inducing an electrical property in a sensing conductor placed in said certain part of the field, and sensing with said sensing conductor any change in the value of the electrical property, said change corresponding to a change in the net orientation of the particles which affect the flux strength in said certain part of the field.
A method of controlling between predetermined limits the net inherent orientation of magnetically permeable particles in a dry dielectric carrier layer surrounding an electrical conductor comprising:
- coating the conductor with the layer of a controlled thickness and in fluid form as a composite mixture of fluid carrier material and the particles;
- passing the conductor through a first magnetic field to orient the particles towards a specific direction relative to the conductor either before or after drying the layer;
- passing the conductor carrying the layer through a second magnetic field to cause the orientation of the particles to affect the magnetic flux strength in at least one certain part of the second field;
- inducing an electrical property in a sensing conductor placed in said certain part of the second field;
- sensing with said sensing conductor any change in the value of the electrical property, said change corresponding to a change in the net orientation of the particles which affect the strength in said certain part of the second field;
- producing electrical signals corresponding to the sensed values of the electrical property and evaluating these signals;
- and
- controlling the strength of the first magnetic field dependent upon the evaluated signals to affect the degree of orientation of the particles as they pass through the first field, to provide a degree of orientation which is desired.
Dependencies are inferred from the claim text.