Bushings comprising notched terminal ears
Assignee3B-Fibreglass sprl
InventorsPhilippe Simon, Dimitri Laurent
Life of this patent
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Abstract
A bushing assembly is provided including terminal ears coupled to opposed end walls of the bushing assembly. Each of the terminal ears includes an electrically conductive plate with a first terminal edge (1D) coupled to a bushing first end wall, and extending away from the first end wall to a second, free terminal edge (1A) and having a curved geometry. The curvature, 1/(2R), at any point of the curved second end of the slot is less than the reciprocal, 1/ Wo, of the smallest gap width, Wo, of both slot first open end, WA, and elongated portion, WB, where R is defined as the radius at any point of the curved second end.
Claims19
A bushing assembly (2) comprising terminal ears coupled to opposed end walls (2A) of the bushing assembly, for heating a bushing tip plate and walls, each of said terminal ears comprising an electrically conductive plate (1) comprising a first terminal edge (1D) coupled to a bushing first end wall (2A), and extending away from said bushing first end wall to a second, free terminal edge (1A) connectable to a source of power (5, 6), said electrically conductive plate comprising a slot (3) comprising:
- (a) a first, open end (3A) of width, WA, at the second, free terminal edge (1A) of said electrically conductive plate,
- (b) an elongated portion (3B) extending towards said first terminal edge (1D) of gap width, WB, and
- (c) a second, closed end (3C) that has a curvature, separate from said first terminal edge (1D) of one of said terminal ears, and having a curved geometry;
- characterized in that, the curvature, 1/(2R), at any point of the second, closed end (3C) of the slot is less than the reciprocal, 1/Wo, of a smallest gap width, Wo, of both slot first open end (3A), WA, and elongated portion (3B), WB, wherein R is the radius at any point of the curved second, closed end (3C).
A bushing assembly (2) comprising terminal ears coupled to opposed end walls (2A) of the bushing assembly, for heating a bushing tip plate and walls, each of said terminal ears comprising an electrically conductive plate (1) comprising a first terminal edge (1D) coupled to a bushing first end wall (2A), and extending away from said bushing first end wall to a second, free terminal edge (1A) connectable to a source of power (5, 6), said electrically conductive plate comprising a slot (3) comprising:
- (a) a first, open end (3A) of width, WA, at the second, free terminal edge (1A) of said electrically conductive plate,
- (b) an elongated portion (3B) extending towards said first terminal edge (1D) of gap width, WB, and
- (c) a second, closed end (3C) that has a curvature, separate from said first terminal edge (1D) of one of said terminal ears, and having a curved geometry;
- characterized in that, the curvature, 1/(2R), at any point of the second, closed end (3C) of the slot is less than the reciprocal, 1/Wo, of a smallest gap width, Wo, of both slot first open end (3A), WA, and elongated portion (3B), WB, wherein R is the radius at any point of the curved second end (3C), and wherein the slot has a keyhole geometry.
Dependencies are inferred from the claim text.