Spot welder with electrode clamp
OwnerPaul A. Wilcoxinventor
Life of this patent
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Abstract
A portable spot welder includes a hand-held electrode clamp assembly. The hand-held clamp has a fixed electrode and a movable electrode adapted to be moved toward and away from the fixed electrode. A spring loaded toggle is used to pivot the movable electrode to clamp a workpiece between the electrodes to exert a predetermined and repeatable pressure. The invention includes an air cooling system. Air is forced through the electrical cables connecting the hand-held electrode clamp to the welder transformer. At the hand-held clamp, the air escapes to the atmosphere through passageways near the electrodes, thereby enabling heat generated within the cables and at the electrodes to be transferred to the flowing air.
Claims5
A hand-held electric welding assembly for welding work pieces comprising:
- a. a hollow frame member having first and second ends;
- b. a fixed jaw having a first end fastened at generally right angles to the first end of the hollow frame member and a second end bearing a first electrode;
- c. a sleeve fastened to the second end of the hollow frame member;
- d. an arm pivotally attached to the first end of the hollow frame member, the arm bearing a second electrode;
- e. toggle means connected to the arm and to the sleeve for pivoting the arm to swing the second electrode into and out of operational engagement with the work piece and the first electrode;
- f. a first multi-conductor insulated electrical cable affixed to the fixed jaw first end and passing through the hollow frame member;
- and
- g. a second multi-conductor insulated electrical cable affixed to the arm and lying parallel to and adjacent the hollow frame member and passing loosely through the sleeve,
- so that moving the arm by the toggle means causes the second electrical cable to slide relative to the first electrical cable.
Dependencies are inferred from the claim text.