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MIG welder attachment for an electric hand drill

  • US 4,801,780 A
  • Filed: 10/14/1987
  • Issued: 01/31/1989
  • Est. Priority Date: 10/21/1985
  • Status: Expired due to Fees
First Claim
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1. A consumable wire electrode welding system including:

  • a metal workpiece acting as a first electrode, a consumable fine wire second electrode, means for feeding said consumable fine wire second electrode towards said metal workpiece for initiating and maintaining an electrical arc therebetween, said feeding means including an electric drive motor, a first arc power means connected between said electrodes for creating an electrical welding arc therebetween, second electrical drive power means for energizing said electric drive motor, control means for selectively connecting said second electrical drive power means to said electric motor and for varying the power supply thereto for the purpose of varying the speed of the consumable wire electrode feed, the improvement wherein said first arc power means and said second electrical drive power means comprises at least one storage battery, and wherein separate circuits are defined by said at least one storage battery and said electrodes, and said at least one storage battery and said electric drive motor, which separate circuits are substantially electrically unaffected by each other such that there is no appreciable drop in arc voltage resulting from variation in drive speed of said motor or vice versa, with said first arc power means at least one battery constituting an inherently stable, totally unregulated welding arc power supply.

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