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US 4,417,225 AGranted
Flat fuse and process for production thereof
AssigneeGrote & Hartmann GmbH & Co. KG
InventorsWulf Muller, Manfred Kaiser
Life of this patent
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AssigneeGrote & Hartmann GmbH & Co. KG
InventorsWulf Muller, Manfred Kaiser
Estimating the term…
A flat fuse including two plug blades arranged next to one another in the same plane, being spaced from one another. The plug blades are fabricated from stamped sheet metal parts, the plug zones of which extend, in each case, rearwardly in a one piece construction into current-conducting straps. Between the straps, there is arranged a fuse fusion wire which is fastened to the straps. The current-conducting straps and the fusion conductor are surrounded by and enclosed in a plastic casing. The fuse fusion wire includes a copper wire with a silver sheathing, and the current-conducting straps as well as the plug blades are fabricated from brass, in which arrangement at least the current-conducting straps, but preferably also the plug blades, are superficially tinned. The fusion conductor is welded, in each case, to a flat side of the current-conducting straps.
A flat fuse comprising two plug blades adjacently spaced from one another in a plane, said plug blades being stamped sheet metal parts, plug zones of said plug blades extending rearwardly in a one piece construction into adjacently spaced current-conducting straps, a fuse fusion element being arranged between said straps and being secured to said straps, said current-conducting straps and said fusion element being surrounded and enclosed by a plastic casing, said fusion element including a copper wire provided with a silver sheathing, said current-conducting straps and said plug blades being fabricated from brass, at least said current-conducting straps being superficially tinned, and said fusion element being welded in each case to a flat side of said current-conducting straps.
Process for production of a flat fuse comprising stamping out contours of sheet metal parts from a tinned brass sheet strip, arranging in each case two stamped sheet metal parts belonging to a fuse element in a mirror image arrangement to one another so that associated contact blades of each fuse element are joined with one another by first material strap and each fuse elemlent communicates with one another over a second material strap in a zone of adjacent contact blades of different fuse elements, introducing the fuse element arrangements into a welding machine with transport holes in the first material straps and pressed-through guide lugs in the second material straps being utilized expediously by corresponding transport elements, feeding an endless fusion wire into the welding machine, welding the wire on each fuse element, cutting away the wire parts not required disposed between the different fuse elements, then continuously separating the first and second material straps from the fuse elements, and then immediately automatically setting casing parts in place on each liberated fuse element and joining said casing parts with one another.
Dependencies are inferred from the claim text.