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US 2002/0171532 A1Published application
Time delay fuse
AssigneeCooper Technologies Company
InventorJohn Marvin Ackermann
Life of this patent
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Abstract
In an exemplary embodiment of the invention, a fuse element for a time delay fuse includes a conductive fuse element member, a fuse link formed within the member, and a heat sink coupled to the member. The heat sink draws heat from the fuse element member and prevents the fuse link from opening for an increased amount of time during high current overload conditions.
Claims19
A fuse element for a time delay fuse comprising:
- a conductive fuse element member;
- a fuse link formed within said member;
- and
- a heat sink coupled to said member.
1 more element
A time delay fuse comprising:
- an insulative fuse body;
- first and second conductive ferrules attached to said fuse body;
- and
- a fuse element extending between said first and second ferrules within said fuse body, said fuse element comprising a fuse link and a heat sink.
1 more element
A single element time delay fuse comprising:
- an insulative fuse body;
- first and second conductive ferrules attached to said fuse body;
- a fuse element extending between said first and second ferrules within said fuse body, said fuse element comprising a fuse link and an M effect alloy coated on a surface of said fuse element, said fuse element and said M effect alloy creating an asymmetric operating temperature distribution in said fuse element;
- and
- a heat sink engaged to said fuse element, said heat sink increasing time delay performance under high current overload conditions, and substantially unaffecting time delay characteristics during low current overload conditions.
2 more elements
Dependencies are inferred from the claim text.