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Apparatus for fusing symmetrically together differently dimensioned members

  • US 5,994,658 A
  • Filed: 05/06/1998
  • Issued: 11/30/1999
  • Est. Priority Date: 11/29/1996
  • Status: Expired due to Term
First Claim
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1. A fusing machine for fusing together pins having predetermined dimensions and wires having predetermined dimensions and forming at least two reliable, quality pin/wire fusion joints, comprising:

  • a frame,an upper fusing electrode mounted on the frame,a lower fusing electrode mounted on the frame and defining on its upper edge at least two, transversely spaced fusing notches,each fusing notch for receiving a wire and a pin for forming a fusion joint,each said fusing notch having predetermined dimensions for supporting each wire on a bottom of each fusing notch and for holding each pin in symmetrical contact with both fusing notch sidewalls so that the pin is initially spaced above the wire,means for moving at least one of said upper and lower electrodes relatively toward the other to enable the upper electrode to symmetrically apply initial pressure to the pin without applying initial pressure to the wire and to symmetrically apply initial heat and current to the pin and to a portion of the lower electrode fusing notch bottom in contact with a lower part of the wire in each fusing notch, andwherein one of the upper and lower electrodes is movable relative to the other for sequentially fusing a series of at least two wire/pin assemblies in at least two fusing notches andwherein within each notch the pin is initially spaced above the wire by a predetermined distance and said means for moving moves at least one of said electrodes toward the other at a predetermined speed that enables substantially all insulation portions on the wire and pin to be burned away or vaporized before the electrodes squeeze the heated wire and pin together to form the fusion joint.

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