Method of making a cellulose-free electrical winding
First Claim
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1. A method of constructing a cellulose-free electrical winding structure in a substantially continuous operation, comprising the steps of:
- providing winding support means, a liquid resin application station, and a resin gelling station;
providing relative rotating motion between the winding support means and the resin application and gelling stations;
forming a first winding layer having at least one conductor turn by applying a conductor to said winding support means;
providing electrical insulation on said first winding layer having a predetermined thickness dimension;
said step of providing electrical insulation including the steps of;
building up said electrical insulation in a plurality of turns by applying a thin coating of liquid resinous insulation from said liquid resin application station during each turn of said relative rotational motion, instantly gelling, in place, each turn of said liquid resinous insulation coating to a firmness sufficient to support a winding layer, and selecting the thickness of each turn of said liquid coating to accommodate shrinkage which occurs when the liquid coating gels turn by turn, to control and limit the maximum size of shrinkage voids;
and forming a second winding layer having at least one conductor turn by applying a conductor to the gelled resinous electrical insulation.
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Abstract
A method of making a cellulose-free electrical winding having a tubular configuration in which layers of insulating resin and conductors are alternately disposed in a concentric pattern, with opposite edges of the conductor turn layers being coated with overlapping layers of resin. The resin is applied as a liquid in thin layers as the winding is being formed, and the liquid resin is instantly gelled to provide mechanical support for the next winding layer.
20 Citations
13 Claims
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1. A method of constructing a cellulose-free electrical winding structure in a substantially continuous operation, comprising the steps of:
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providing winding support means, a liquid resin application station, and a resin gelling station; providing relative rotating motion between the winding support means and the resin application and gelling stations; forming a first winding layer having at least one conductor turn by applying a conductor to said winding support means; providing electrical insulation on said first winding layer having a predetermined thickness dimension; said step of providing electrical insulation including the steps of; building up said electrical insulation in a plurality of turns by applying a thin coating of liquid resinous insulation from said liquid resin application station during each turn of said relative rotational motion, instantly gelling, in place, each turn of said liquid resinous insulation coating to a firmness sufficient to support a winding layer, and selecting the thickness of each turn of said liquid coating to accommodate shrinkage which occurs when the liquid coating gels turn by turn, to control and limit the maximum size of shrinkage voids; and forming a second winding layer having at least one conductor turn by applying a conductor to the gelled resinous electrical insulation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification