Siemens Electric Limited

Victor Derbowka

Bernard J Hrytzak

A non-metallic bobbin (22) has features on a radial flange (28) which allow magnet wire (MW) that forms an electromagnet coil (114) on the bobbin core (24) to be tensioned throughout. An end segment of magnet wire is wrapped around a post (56) on the bobbin flange, and the magnet wire runs in tension generally diametrically across the bobbin to pass through slots (66, 68) in opposite walls of an electric-terminal-receiving socket (60) also on the flange. The wire runs in grooved tracks (74, 70) proximate the socket to pass around the perimeter edge of the flange to the opposite flange face where it is wound in tensioned convolutions around the core to create the coil. It then runs in tension from the coil around the perimeter edge of the flange to pass through a second socket (62) having the same associated features as the first socket (60). From there the tensioned magnet wire extends back across the bobbin to be tied to the post. Terminals (84, 86) are then inserted into the sockets to connect to the magnet wire and maintain wire tension. The post and groove tracks (74, 76) associated with a respective socket are then severed from the bobbin, also severing those portions of the wire that extended from the sockets to the post.

Growing community of inventors

Chatham, Canada

Victor Derbowka