KNIFE-BLADE SWITCH Russian patent published in 1995 - IPC

FIELD: electrical engineering. SUBSTANCE: knife-blade switch has metal frame 1 which carries stationary contacts 16 and leads 17 placed separately per each pole and cross-piece which carries mobile contacts 13. Knife blade switch is fitted with three insulating elements 2-4, supports, transition elements 7 and brackets 5. Brackets 5 are anchored in center part of frame 1. Two insulating elements 2, 4 are placed on edges of frame, one carrying stationary contacts 16, the other one-leads 17. Cross-piece presents third insulating element 3 with transition elements 7 which is fixed between brackets 5. Cross-piece is mounted for angular movement and rests against frame 1. Supports are mounted perpendicular to cross-piece, mobile contacts are attached to supports by means of bolt, nut and spring. Supports are installed in plane of placement of stationary contacts 16 and leads 17 and are mounted for resting against leads 17. Transition elements 7 are attached to insulating element 3, they are manufactured in the form of angular piece with axles 8. Mobile contacts 13 are assembled from parallel plates bent in the form of channel. EFFECT: improved reliability of knife-blade switch. 2 dwg