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US 4,228,417 AGranted
Electric fuse and method of manufacturing the same
AssigneeGould Inc.
InventorRichard A. Belcher
Life of this patent
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AssigneeGould Inc.
InventorRichard A. Belcher
Estimating the term…
A sub-assembly for electric fuses comprising a perforated fusible element having a pair of ribbon ends. The ribbon ends are bent around the rims of the casing from the inside to the outside of the casing. In fuses including such a sub-assembly one of the ends may be pre-bent, i.e. bent prior to insertion of the fusible element and its pair of ends into the casing. The other end or non-pre-bent end, must be bent around one of the rims of the tubular casing to the outer surface thereof preparatory to the mounting of the terminal caps, or ferrules, on the casing. This bending operation may involve great difficulties, particularly if the pair of ends have great dimensional stability, and the perforated fusible element portion is relatively frail, and tends to be twisted and/or otherwise deformed when one of the pairs of ends is bent around the rim of the casing to the outer surface thereof. According to this invention the casing of the fuse is provided with a slot extending axially inwardly from one of its rims and has a sufficient length to allow insertion of the fusible element into said casing with both of its ends pre-bent. The pre-bent ends are angularly displaced relative to the slot in the casing which allowed the fusible element to be inserted into the casing with both ends thereof pre-bent. Also described herein is a sub-assembly having a pair of longitudinal slots rather than but one.
A sub-assembly of an electric fuse comprising a tubular casing of electric insulating material having a pair of rims, a perforated fusible ribbon element inside said casing, said fusible ribbon element having a pair of ribbon ends bent around said pair of rims from the inside of said casing to the outside thereof, wherein the novel features consist in that said casing has at least one slot extending axially inwardly from one of said pair of rims and being of sufficient length to allow insertion of said fusible ribbon element and its ribbon ends into said casing with said pair of ribbon ends in pre-bent state and said pair of ribbon ends and said slot being angularly displaced relative to each other.
A sub-assembly for an electric fuse comprising a tubular casing of electric insulating material having a pair of rims, a perforated fusible element inside said casing, said fusible ribbon element having a pair of ribbon ends bent around said pair of rims from the inside of said casing to the outside thereof, wherein the novel features consist in that said casing is provided with at least one substantially rectangular cut-out beginning at one of said pair of rims, the width of said cut-out exceeding the width of said pair of ribbon ends so that at least one of said ribbon ends may be moved from the inside of said casing through said cut-out to the other surface of said casing, and in that said cut-out and said pair of ends of said fusible ribbon element are angularly displaced in regard to the axis of said casing.
A method of manufacturing a sub-assembly for an electric fuse comprising a tubular casing of electric insulating material having a pair of rims, a perforated fusible element inside said casing, said fusible element having a pair of ribbon ends bent around at least one of said pair of rims from the inside of said casing to the outside thereof, wherein the novel features consist in
A method of manufacturing a sub-assembly for an electric fuse including the steps of:
A method of manufacturing a sub-assembly for an electric fuse including the steps of:
Dependencies are inferred from the claim text.