Double point resistance welding machine

In a double point welding machine with a current bridge arrangement having, on one side of a welding plane, at least one pair of active electrodes which are spaced from one another to provide the double point welding interval and are adapted to be connected to a secondary side of a welding transformer;

• a current bridge carrying passive counter-electrodes for operative association with said active electrodes whereby welding pressure may be applied to a workpiece in said welding plane between said active electrodes and said passive counter-electrodes;
• and means pivotally mounting said current bridge;
• an improved current bridge arrangement comprising a pressure beam supporting said current bridge;
• end portions of said pressure beam projecting substantially into said welding plane;
• guides running normally to said welding plane and cooperating with said pressure beam end portions for relative sliding thereof and tilting thereof in the plane of said pressure beam;
• two pressure members each having first and second ends;
• means pivotally connecting said first end of each of said pressure members to a respective one of said pressure beam end portions adjacent to said welding plane;
• a second beam extending substantially parallel with the line joining said pivotal connections between said pressure member first ends and said pressure beam end portions, and having first and second ends;
• means pivotally supporting said second beam at the centre thereof;
• and means pivotally connecting said second end of each of said pressure members to a respective one of said first and second ends of said second beam.