Abstract: A magnetic device (10), suitable for attachment to a substrate, includes at least one sheet winding (24) having a pair of spaced-apart terminations (26), each receiving an upwardly rising portion (28) of a lead (12). The sheet winding terminations and upwardly-rising lead portions, together with at least a portion of the sheet windings, are then encapsulated with masses of insulative material (18, 19 and 34). A ferromagnetic core (20,22) surrounds at least a portion of the sheet windings to impart a desired magnetic property to the device.

Abstract: A spiral, self-terminating coil (12) is formed of an elongated metallic member (10) having at least a first and second tabs (22,23) extending out from a separate one of the ends (18,20) of the member such that each tab is perpendicular to the axis of the member. At least one notch (26) is provided in the member (10) intermediate the tabs and parallel thereto. Each notch (26) is located so that when the member is wound in the spiral, the notches are aligned with the tab inside of the spiral. The inside tab can thus be oriented perpendicular to the spiral turns so as to extend through the notches beyond the spiral.

Abstract: A miniature current transformer is equipped with a primary winding insert formed as a stamped metal piece with elongate legs and a flange portion disposed at 90 degrees to the legs. The top of the flange is unobstructed by other structural details, and is wide enough to be gripped by vacuum pick-and-place equipment. At the same time the insert is electrically functional as the transformer's primary winding. The flange rests on surfaces formed in the transformer bobbin. The insert legs are mounted through passages n the bobbin leading out to the bobbin's bottom side. The legs are formed into gull-wing ends that have a dual role as lock tabs to secure the insert on the bobbin, and as the primary leads.