Metal working – Method of mechanical manufacture – Electrical device making
Patent
1978-11-02
1980-05-20
Husar, Francis S.
Metal working
Method of mechanical manufacture
Electrical device making
29756, 113116P, H01H 6902
Patent
active
042032008
ABSTRACT:
A method and apparatus for making an encapsulated, three-piece electrically conducting component, such as a fuse, are provided wherein a progressive stamping die is used to form a pair of spaced apart blades in a sheet stock of electrically conducting metal. Each blade has at one end a terminal portion connected to a carrier member formed from the strip and at the other end a pair of spaced-apart rear bearing members and a flexibly hinged front bearing tongue disposed between the rear bearing members. The rear bearing members have a cradle with a substantially concave cross section for receiving a conducting wire therein. In the die, the tongue is forced outwardly away from the rear bearing members to provide an opening between the distal end of the bearing tongue and the cradles of the rear bearing members. A continuous wire may be inserted into the blades. Then the force on the tongue is relieved to permit it to move back toward the rear bearing members to securely clamp the wire in the cradles. The wire is severed on each side of a pair of blades to form a three-piece structure with a wire segment extending across, and being clamped between, a pair of spaced-apart blades. A plurality of such three-piece conducting components, still connected to the carrier member, may be then placed in a suitable molding apparatus wherein each wire segment and portions of the pair of blades of each component is encapsulated with a unitary body of electrically insulating thermoplastic material.
REFERENCES:
patent: 2052533 (1936-08-01), Pender
patent: 3493915 (1970-02-01), Cox
patent: 4067103 (1978-01-01), Ciesmier
patent: 4099320 (1978-07-01), Schmidt
patent: 4099322 (1978-07-01), Tait
Crosby Gene P.
Husar Francis S.
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