Explosion resistant insulator and method of making same
OwnerJeffry R. Meyer, John S. Billings, Jr. +2inventors
InventorsJeffry R. Meyer, John S. Billings, Jr., Harvey E. Spindle, Charles F. Hofmann
Life of this patent
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Abstract
An electrical insulator assembly and method of manufacturing same, having a generally cylindrical or conical body portion formed of a breakable cast solid insulation system and a reinforcing member having a corrugated configuration and formed of a web or mesh type reinforcing fabric. When the breakable body member has been broken, the corrugated configured reinforcing web member provides a path of escape for pressurized insulating fluid while limiting the movement of body member fragments in the direction of escape of the pressurized fluid.
Claims11
An electrical insulator assembly, comprising:
- (a) a body member formed of a cast electrical insulating material;
- and
- (b) an open mesh web reinforcement member being embedded in said body member, said web reinforcement member having a corrugated tubular configuration to allow movement of said open mesh web reinforcement member without tearing upon fracture of said cast electrical insulating material so that said open mesh web reinforcement member will limit displacement of fragments of said cast electrical insulating material.
An electrical insulator assembly comprising:
- a self-supporting pressure containment member of breakable electrical insulating material having an enclosed hollow region defined by the body of said pressure containment member, said electrical insulating material being brittle and subject to fragmentation;
- pressurized fluid disposed in said hollow region;
- an electrical conductor disposed in said hollow region and communicating with a region outside of said body member;
- a web reinforcement member of electrical insulating filaments bonded together to form an open mesh web, said web reinforcement member being embedded in said pressure containment member such that said electrical insulating material surrounds said filaments, said web reinforcement member having a corrugated tubular configuration to allow movement of said open mesh without tearing of said insulating filaments upon fracture of said electrical insulating material so that said open mesh will limit displacement of fragments of said electrical insulating material while allowing release of said pressurized fluid from said pressure containment member when said pressure containment member has been broken.
A method for making an electrical insulator assembly, comprising the steps of:
- forming an open-weave fabric into a semi-rigid, tubular corrugated-shaped member with the inside periphery of the innermost projections of the corrugations of the corrugated tubular member sized to fit snugly over the center core of an insulator casting mold;
- disposing said semi-rigid tubular corrugated-shaped member snugly around a predetermined portion of the center core of an insulator-casting mold;
- applying outer half sections of an insulator casting mold around the center core and said semi-rigid tubular corrugated-shaped member to form a completed casting mold;
- filling the casting mold with a liquid resin;
- curing the resin within the casting mold to form an insulator body member;
- and
- removing the casting mold from the cured electrical insulator to produce an electrical insulator having a corrugated-shaped reinforcing fabric member at a predetermined location within the insulator body member.
Dependencies are inferred from the claim text.