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ELECTRICAL CONNECTIONS

  • US 3,702,387 A
  • Filed: 06/04/1971
  • Issued: 11/07/1972
  • Est. Priority Date: 06/04/1971
  • Status: Expired due to Term
First Claim
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1. The method of electrically and mechanically connecting a resistor coil of an electric strip heater to a flat surface on the head of a terminal bolt which is adapted to be connected to a source of electrical energy, comprising;

  • disposing the shank of the bolt in an opening in one electrode of a resistance welding machine with the bolt head overlying the tip of the electrode and its flat surface exposed, positioning a group of convolutions of said resistor coil against said flat surface, moving another electrode of said welding machine toward said one electrode so that its tip flattens said group of convolutions between it and said flat surface, said tip being round whereby said convolutions are overlapped as they are flattened, and passing welding current from one electrode through the group of flattened convolutions and said bolt head and to the other electrode while pressing said rounded tip against said flattened convolutions whereby the overlapped convolutions at the center of said rounded tip are fully fused to said flat surface and the overlapped convolutions off the center of said rounded tip have a stick weld to said flat surface.

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