Method and apparatus for helically winding wire on a ring-shaped core

An apparatus for helically winding a wire on a ring-shaped core by revolving the core circumferentially about its axis while rotating a wire drum having a reserve supply of wire thereon relatively to said core so that said wire drum will move around a part of the revolving core while passing through the ring thereof, comprising:

• a mechanism for revolving the ring-shaped core circumferentially about its axis;
• a mechanism for rotating the wire drum relatively to the core so that said wire drum will move around a part of the revolving core while passing through the ring thereof;
• and
• guide means disposed substantially continuously along the entire locus of revolution of the core, for slidably securing the leading end of the wire thereon and for allowing movement of the leading end of the wire circumferentially along with the core relative to said guide means but inhibiting rotation of said wire end around the core transversely to the circumferential direction thereof, said guide means also having at a part thereof a transfer section designed to allow passage of the wire therethrough.