Fusible link
First Claim
1. A fusible link comprising two pieces of sheet material, each piece having opposite ends and opposite side edges, one of said ends defining the opposite ends of said link, the other of said ends having generally planar surfaces between said side edges, said planar surfaces being superimposed adjacent the other of said ends, said superimposed surfaces being devoid of material weakening apertures, an effective amount of eutectic solder, said solder being solely positioned between said superimposed surfaces, said pieces being bent at said superimposed surfaces to define a bend extending transversely across said pieces from one of said side edges to the other of said side edges to provide additional strength to said link when said shear forces are applied to said solder and to reduce creep at temperatures below the eutectic temperature of said solder, and means including said bend for quickly separating said pieces when said eutectic solder reaches its eutectic temperature, said link being nestable with other links superimposed thereon for shipping.
1 Assignment
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Accused Products
Abstract
A new and improved fusible link having opposite ends. The fusible link comprises two pieces each having opposite ends. One of the opposite ends of each piece defines the opposite ends of the link. The other end of said pieces overlap each other and have a eutectic solder therebetween. Means is provided adjacent the other end of the pieces to strengthen the link in tension between the opposite ends when said solder is in shear and to reduce creep. Means is also provided adjacent the other ends of the pieces to separate the pieces and break the linkage upon the eutectic solder reaching the eutectic temperature. The new and improved fusible link in a specific embodiment utilizes a crimp and crimp sliding surfaces to prevent creep at temperatures lower than the eutectic temperature for providing separation of the link upon the solder being heated to a eutectic temperature.
24 Citations
19 Claims
- 1. A fusible link comprising two pieces of sheet material, each piece having opposite ends and opposite side edges, one of said ends defining the opposite ends of said link, the other of said ends having generally planar surfaces between said side edges, said planar surfaces being superimposed adjacent the other of said ends, said superimposed surfaces being devoid of material weakening apertures, an effective amount of eutectic solder, said solder being solely positioned between said superimposed surfaces, said pieces being bent at said superimposed surfaces to define a bend extending transversely across said pieces from one of said side edges to the other of said side edges to provide additional strength to said link when said shear forces are applied to said solder and to reduce creep at temperatures below the eutectic temperature of said solder, and means including said bend for quickly separating said pieces when said eutectic solder reaches its eutectic temperature, said link being nestable with other links superimposed thereon for shipping.
Specification