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Process for the preparation of coil for electric appliance and coil for electric appliance

  • US 20050046538A1
  • Filed: 08/25/2004
  • Published: 03/03/2005
  • Est. Priority Date: 08/27/2003
  • Status: Active Grant
First Claim
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1. A process for the preparation of a coil for an electric appliance by squarely winding an electric conductor having a rectangular cross section such that small sides of the cross section corresponds with the direction of the coil axis of the coil to helically superpose the conductor, comprising the steps of:

  • processing mechanically an electrically conductive flat plate to form plural stripe-shaped coil fragments;

    butting ends of the coil fragments each other and beam welding the ends to form plural one-turn square coils having notches whose locations differs from one another, each of the one-turn square coils having a ring-shape provided with a beginning end and a terminal end divided by the notch; and

    superposing the one-turn square coils on one another while shifting the locations of the notches little by little in order so that the terminal and beginning ends of the one-turn square coils adjacent to each other are in contact with each other to weld or braze the terminal and beginning ends, whereby the one-turn square coils are spirally bonded.

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