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US 4,054,680 AGranted
Method of fabricating improved capacitors and transformers
AssigneeGeneral Electric Company
InventorsAmandus H. Sharbaugh, David G. Shaw
Life of this patent
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Abstract
Before impregnation with fluid a capacitor roll, or a transformer core and coil, is filled with a monomeric gas that is thereafter polymerized, in situ, in a plasma discharge. Formation of solid polymer occurs at the regions of most intense electric field, thereby raising both corona-start and operating voltage for these devices.
Claims7
A process for increasing corona-start voltage and operating voltage of a device to be fluid-impregnated, said device including a layer of insulating material between two layers of conductor, said process comprising:
- maintaining said device in an atmosphere of unsaturated monomeric gas;
- and
- converting said unsaturated monomeric gas to solid polymer at regions of high electric stress in said device when a voltage is applied across said two layers of conductor.
Dependencies are inferred from the claim text.