Abstract A current limiting fuse element comprising a fuse link or portions of reduced cross section of such a relatively small area or size that they would normally be unable to support themselves alone. The fuse element is intimately bonded or attached to a relatively larger rigid dielectric mass by methods, such as printing, vacuum deposition or etching, so that the larger dielectric mass provides the structural support for the relatively thin current limiting regions or portions and also assists in removing heat from the fuse element during both normal operation and also during fusing of the fuse element. The fuse element and its dielectric support may be used independently or may be used as the fuse element in a cartridge-type fuse where the entire fuse element is disposed in a casing and embedded in a pulverulent, arc quenching material, such as sand, which may be provided to assist in arc extinction upon fusing of the fuse element and to absorb the heat during fusing. In addition, the relatively rigid, dielectric mass may be adapted to accommodate or receive a heat transferring means through which fluid may flow. Heat generated during normal operation of the fuse or during a fusion operation may be removed by the moving fluid.
An electric fuse structure comprising a substantially rigid dielectric heat conducting supporting member formed primarily from a thermosetting resinous material, a ribbon of fusible material having at least one notch to form a relatively smaller cross-sectional region intimately bonded along substantially its entire length to said dielectric member, said ribbon of fusible material being incapable of structurally supporting itself independently of the support of said dielectric member, said dielectric member including a separate integrally disposed tubular heat removing duct extending therethrough adapted to accommodate the flow of heat absorbing fluid therein, a heat path existing from said fusible ribbon through said dielectric member into said tubular duct to the moving heat absorbing fluid.
Claim 2
Dependent Claim
113 words
An electric fuse structure comprising a substantially rigid dielectric heat conducting supporting member formed primarily from a thermosetting resinous material, a ribbon of fusible material having at least one notch to form a relatively smaller cross-sectional region intimately bonded along substantially its entire length to said dielectric member, said ribbon of fusible material being incapable of structurally supporting itself independently of the support of said dielectric member, said dielectric member including a separate integrally disposed tubular heat removing duct extending therethrough adapted to accommodate the flow of heat absorbing fluid therein, a heat path existing from said fusible ribbon through said dielectric member into said tubular duct to the moving heat absorbing fluid.
Claim 3
Dependent Claim
113 words
An electric fuse structure comprising a substantially rigid dielectric heat conducting supporting member formed primarily from a thermosetting resinous material, a ribbon of fusible material having at least one notch to form a relatively smaller cross-sectional region intimately bonded along substantially its entire length to said dielectric member, said ribbon of fusible material being incapable of structurally supporting itself independently of the support of said dielectric member, said dielectric member including a separate integrally disposed tubular heat removing duct extending therethrough adapted to accommodate the flow of heat absorbing fluid therein, a heat path existing from said fusible ribbon through said dielectric member into said tubular duct to the moving heat absorbing fluid.
Claim 4
Dependent Claim
113 words
An electric fuse structure comprising a substantially rigid dielectric heat conducting supporting member formed primarily from a thermosetting resinous material, a ribbon of fusible material having at least one notch to form a relatively smaller cross-sectional region intimately bonded along substantially its entire length to said dielectric member, said ribbon of fusible material being incapable of structurally supporting itself independently of the support of said dielectric member, said dielectric member including a separate integrally disposed tubular heat removing duct extending therethrough adapted to accommodate the flow of heat absorbing fluid therein, a heat path existing from said fusible ribbon through said dielectric member into said tubular duct to the moving heat absorbing fluid.