HIGH-VOLTAGE VACUUM SWITCH Russian patent published in 1995 - IPC

FIELD: electrical engineering. SUBSTANCE: switch has at least one arc-control chamber 1 whose movable contact 2 is connected to operating mechanism by means of hold-down mechanism provided with bushing 4 fixed to output end of movable contact 2 and accommodating hold-down spring 5 mounted for interaction with retainer 6; bushing 4 is provided with step 10 affording restriction of reciprocating movement of retainer 6 inside it. EFFECT: simplified design, eliminated bending moment in bushing thread exit plane. 2 dwg