electric arc welders, arc welding electrodes, and electrical controllers therefor

ELECTRIC WELDERS AND PROGRAMMABLE ELECTRONIC CONTROLS THEREFOR, NAMELY, ARC WELDERS, COATED ELECTRODES, INFUSIBLE ELECTRODES, CONTINUOUS ELECTRODE FEEDING GAS SHIELDERS, CONTINUOUS ELECTRODE FEEDING CARBON ARC SHIELDERS AND GASEOUS ELECTRODES; RESISTANCE WELDERS, NAMELY, SPOT WELDERS, PROJECTION WELDERS, SEAM WELDERS, BUTT WELDERS AND ELECTRONIC CONTROLS THEREFOR; RESISTANCE HEATERS, NAMELY, ROD HEATERS, UPSETTING MACHINES AND BRAZERS; ROBOTIC CONTROLS, TRANSFER MACHINES AND MULTIPOINT WELDERS