Abstract: A method of operating a welding machine as well as to a welding machine comprising a frame, a first electrode (33) having a fixed position in the frame and a second electrode (35) which is mounted in the frame so as to be movable with respect to the frame, whereby said second electrode (35) can be moved towards the first electrode (33) for welding together components arranged between said two electrodes (33, 35). During displacement of the second electrode (35) from a starting position towards a welding position, the second electrode (35) is moved more rapidly at the beginning of the displacement than at the point where the second electrode is near the position suitable for welding. To obtain said displacement of the second electrode (35), a cam mechanism (10) has been provided between an operating member (12) and a lever (28), which cam mechanism supports the second electrode (35) and is pivotable with respect to the frame.

Abstract: A method of manufacturing an electron gun having a sub-assembly to interconnect the beaded unit and the base of the electron gun. This sub-assembly is manufactured by making a pattern of apertures in a planar element, thereby forming a number of securing elements. In the next step, portions of the securing elements are bent out of the plane of the planar element and then connected to an insulating plate, thus forming the sub-assembly of securing elements and insulating plate. This sub-assembly is preferably provided with funnel-shaped apertures to lead the electric leads of a number of gun electrodes through the insulating plate. This allows an accurate and easy interconnection of the electric leads and the pins of the base.

Abstract: The invention relates to a method of operating a welding machine as well as to a welding machine comprising a frame, a first electrode (33) having a fixed position in the frame and a second electrode (35) which is mounted in the frame so as to be movable with respect to the frame, whereby said second electrode (35) can be moved towards the first electrode (33) for welding together components arranged between said two electrodes (33, 35). During displacement of the second electrode (35) from a starting position towards a welding position, the second electrode (35) is moved more rapidly at the beginning of the displacement than at the point where the second electrode is near the position suitable for welding. To obtain said displacement of the second electrode (35), a cam mechanism (10) has been provided between an operating member (12) and a lever (28), which cam mechanism supports the second electrode (35) and is pivotable with respect to the frame.