Portable electric welder

Claim 1

A WELDER FOR EMBRACING AND WELDING TWO TUBES AND A COUPLING, SAID WELDER COMPRISING TWO COMPLEMENTARY CONDUCTING MEMBERS EMBRACING ONE OF THE TUBES TO BE WELDED, TWO COMPLEMENTARY INSULATING MEMBERS COOPERATING TO EMBRACE THE CONDUCTING MEMBERS, TWO COMPLEMENTARY SHELL PARTS EXTENDING AXIALLY BEYOND THE CONDUCTING MEMBERS AND BEING RADIALLY OUTWARD THEREOF AND COOPERATING TO ENCLOSE A WELDING SPACE, MEANS FOR HOLDING ONE CONDUCTING MEMBER, ONE INSULATING MEMBER, AND ONE SHELL PART FIXED TO ONE ANOTHER IN A UNIT, MEANS FOR HOLDING THE OTHER CONDUCTING MEMBER, THE OTHER INSULATING MEMBER, AND THE OTHER SHELL PART FIXED TO ONE ANOTHER IN A SECOND UNIT, MEANS FOR PIVOTALLY CONNECTING THE UNITS TO ONE ANOTHER TO PERMIT INSERTION OF THE TUBES AND COUPLING, AN ANNULAR UNIT ROTATABLE WITH RESPECT TO THE CONDUCTING MEMBERS, INSULATING MEMBERS, AND SHELL PARTS WHEN BROUGHT TOGETHER TO EMBRACE THE TUBES AND COUPLING TO BE WELDED, EACH ANNULAR UNIT BEING FORMED OF COMPLEMENTARY HALVES EACH COMPRISING A NONCONDUCTING SECTION ENGAGING THE SHELL PARTS AND CONDUCTING MEMBERS SO AS TO RIDE THEREON DURING ROTATION OF THE ANNULAR UNIT, A CONDUCTING SECTION MOUNTED ON THE NONCONDUCTING SECTION SO AS TO BE INSULATED FROM THE CONDUCTING MEMBERS AND TO FACE THE INSULATING MEMBERS AT ONE END, AND GEAR TEETH PROVIDED ON THE CONDUCTING SECTIONS FOR ROTATING THE ANNULAR UNIT, THE ANNULAR UNIT FURTHER COMPRISING A WELDING ELECTRODE POSITIONED WITHIN THE SHELL PARTS AND MOUNTED ON ONE OF THE COMPLEMENTARY HALVES IN CONDUCTING RELATIONSHIP WITH THE CONDUCTING SECTION THEREOF, THE WELDING ELECTRODE ROTATING ABOUT THE TUBES AND COUPLING DURING ROTATION OF THE ANNULAR UNIT, AND BRUSHES MOUNTED IN THE INSULATING MEMBERS SO AS TO HAVE SLIDING CONTACT WITH THE CONDUCTING SECTION.