Inductance element

An inductance element comprising:

• a pair of pot cores, each pot core comprising a cylindrical slug and opposed shells spaced from and partially surrounding said slug, each of said opposed shells being joined to said slug at an end of said slug by a disc portion that partially circumferentially extends about said slug, a coil bobbin comprising a hollow cylindrical member with opposed flanges at each end thereof extending generally perpendicular to the longitudinal axis of said cylindrical member and outwardly from the external surface of said cylindrical member, each of said flanges extending partially circumferentially about said cylindrical member along a first arc thereof and mating with a corresponding one of said disc portions, said flanges at one end of said coil bobbin each including a joining part extending away therefrom which engages with and interfits with a corresponding one of said pot cores, said joining parts each including a stepped part at a level spaced from that of said flange to which it is joined, said stepped parts having portions thereof that extend about said cylindrical member along second arcs thereof different from said first arcs, said stepped part carrying connectors for making electrical connection to the inductance element, and a fastening member extending at least partially about said pot cores for joining together said pot cores and coil bobbin.