Automatic feed resistance welding gun

Claim 1

IN A PORTABLE WELDING APPARATUS THAT MAY BE HAND CARRIED HAVING A CASING SUPPLIED WITH ELECTRICAL POWER, FLUID PRESSURE AND COLLET MEANS FOR SUPPORTING A PART TO BE WELDED TO A WORK MEMBER, THE IMPROVEMENT COMPRISING SUPPLY MEANS CONVEYING PARTS TO SAID COLLET MEANS IN A PREDETERMINED POSITION, FLUID PRESSURE MEANS CONNECTED TO SAID SUPPLY MEANS TO MOVE SAID PARTS SEQUENTIALLY INTO SAID COLLET MEANS, MANUALLY ACTUATED MEANS CONTROLLING SAID FLUID PRESSURE MEANS TO SELECTIVELY SUPPLY PARTS TO SAID COLLET MEANS, RECIPROCABLE MEANS MOUNTED IN SAID CASING AND BEING MOVABLE TO FORCE A PART SUPPORTED IN SAID COLLET MEANS INTO CONTACT WITH A WORK MEMBER, ELECTRICAL SWITCHING MEANS MOUNTED IN SAID CASING AND CONNECTED TO THE ELECTRICAL POWER SOURCE, AND MECHANICAL ACTUATING MEANS ON SAID ELECTRICAL SWITCH MEANS ENGAGEABLE BY A PART OF SAID RECIPROCABLE MEANS TO CLOSE THE SWITCH AND APPLY ELECTRIC POWER TO SAID RECIPROCABLE MEANS AND TO THE PART WHEN THE PART IS PRESSED THROUGH SAID COLLET MEANS INTO ENGAGEMENT WITH THE ELECTRICALLY GROUNDED WORK MEMBER THEREBY COMPLETING AN ELECTRICAL WELDING CIRCUIT.