Abstract: An electromagnetic coil assembly includes a bobbin upon which a coil of magnet wire is wound. The bobbin includes a body having first and second flanges formed at the ends thereof. First and second circumferentially spaced slots are formed through the first flange which receive the start and finish ends of the coil. A pair of lead wires are connected to the respective ends of the coil of the magnet wire. The bobbin futher includes an extension which extends from the first flange. A circumferential lip is formed at the axial end of the extension having an outer periphery which is non-circular in shape. A cap is provided to having an end wall and a circumferential sidewall. An opening is formed through the end wall of the cap and preferably has an inner periphery of the same general shape as the outer periphery of the lip formed on the extension of the bobbin.

Abstract: A mold locator is adapted to support and position a wound electromagnetic coil within a mold for encapsulation of the coil by dielectric media. In one preferred form, the locator includes an annular central body having arms extending radially from the central body. In addition to having a pair of stiffening ribs extending along the sides thereof, each arm incorporates a channel for carrying a wire lead. The central body is annular in shape and defines an interior wall having a plurality of radially extending detents adapted to make point contacts with a centering arbor in the mold. Similarly, each radially extending arm of the mold locator incorporates at least one detent adapted to make a point contact with the floor or bottom of the mold cavity. Collectively, the detents operate to limit surface contact between the locator and the internal surfaces of the mold.