US 4,057,775 A · Support assembly for fusible element of a high voltage fuse

Abstract

A support assembly for a helically wound fusible element of a high voltage fuse is fabricated from two identical pieces of insulating material that are formed with mating center slots so that the pieces can be reversed and joined one over the other along the slots to form a x-shaped support member. Finger projections having recesses for supporting a fusible element are formed along the edges of the pieces in such a positional relationship that when the pieces are joined together, the recesses are positioned to form the required helical path for the fusible element. A metallic terminator member may be mounted at each end of the support member to position and mount the support member within the fuse in a fixed position. The terminator members include a center keyed opening that receives the support member and positions and retains the support member. A wire retainer can be used to engage grooves in the ends of the support member that extend through the keyed opening to lock the terminator member to the support member.

Claims21

Dependent claims

A support assembly for supporting in a predetermined three-dimensional helical path at least one fusible element within the body of a fuse comprising:

a first and a second support member, each of said support members identically formed of a sheetlike electrically non-conductive material and having a slot formed along the central axis thereof from one end to at least the middle thereof, and each of said support members having fusible element retaining recesses formed along the edges thereof in a predetermined positional relationship, said first and second support members being joined together along said slots approximately at right angles to each other with respect to said central axis, the predetermined positional relationship being such that the fusible element retaining recesses align to form the predetermined three-dimensional helical path of the fusible element when said first and second support members are joined.

In a high voltage fuse including a hollow insulator housing, end walls sealing each end of the insulator housing, at least one fusible element wound in a predetermined helical path within the insulator housing, and an electrically non-conductive filler material in the insulator body surrounding the fusible element;

an improved support assembly for the fusible element comprising:
a pair of identically shaped flat elongated support members formed of a thin electrically non-conductive material, each of said support members having a slot formed from one end along its center to at least the middle of said member, and each of said members having a plurality of fusible element support projections having element retaining recesses in the ends thereof extending from opposite edges of said support members, said support projections being positioned in a predetermined positional relationship, said support members being joined approximately perpendicular to one another so that said slots engage one another, the predetermined positional relationship of said support projections being such that the element retaining recesses in the ends of said projections form the predetermined helical path of the fusible element so that the fusible element engages said recesses and is supported within the insulator housing when said support members are joined.

Dependencies are inferred from the claim text.

Support assembly for fusible element of a high voltage fuse

Life of this patent

Support assembly for fusible element of a high voltage fuse

Life of this patent

Abstract

Claims21