Abstract:
The disclosed vacuum switch has features that give it exceptional high-voltage withstand ability even after its contacts have been roughened by the effects of arcing. Both contacts of the switch are arranged to move during opening and closing operations. When the switch is fully-open, the contacts are located in shielded positions behind the front faces of shielding electrodes which respectively surround the contacts. During closing, each of the two contacts is driven out of its fully-open shielded position into the gap between the two shielding electrodes, engaging the other contact when the contacts are approximately midway between the shielding electrodes.
Abstract:
Contact structure for a vacuum-type circuit interrupter comprising a contact containing an annular groove surrounding an integral central boss. An annular contact-making button is fitted in the groove and is secured in place by deforming the outer periphery of the boss to define an integral lip extending radially outwardly from the boss, overlapping a radially inwardly projecting shoulder on the button, and tightly sandwiching the shoulder against the bottom of the groove.