H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/142
H01H 85/38 (2006.01) H01H 85/047 (2006.01)
Patent
CA 1058258
ABSTRACT OF THE DISCLOSURE A power vacuum fuse using coaxial electrodes with the fuse length disposed therebetween. In one embodiment of the invention a larger diameter outer cylinder is partially disposed around a hollow inner cylinder within an evacuated chamber and the fuse links are connected from the inner cylinder to the outer cylinder. The inner cylinder can have spiral or slots formed therein to move the arc as de- sired. In another embodiment of the invention a solid inner cylinder is disposed within a hollow diameter outer cylinder, which can form or be directly connected to a metallic en- closure. Current paths can be provided into the solid inner cylinder from both ends, thus substantially increasing the current carrying capacity of a given size vacuum fuse. In yet another embodiment of the invention a hollow inner cyl- inder is partially disposed within a larger diameter outer cylinder. me inner cylinder is connected at one end to a terminal means and the free end thereof has an outward radially extending lip which extends into a folded back hollow cylindrical portion from the inner diameter portion. Thus the hollow inner cylinder provides for an elongated current path in a direction to reduce some magnetic force.
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