SPRING-TYPE OPERATING MECHANISM FOR CONTROLLING THREE-POSITION SWITCHING APPARATUS Russian patent published in 2003 - IPC

FIELD: mechanical devices for electric apparatus building. SUBSTANCE: spring-type operating mechanism designed for controlling three-position switching apparatus has main shaft and two control shafts joined together by means of levers and spring; these control shafts are placed one inside other with interlocking device in-between. Levers disposed on one of control shafts are made in the form of disks with slits to receive one of supporting ends of spring, other end of spring being coupled with disk of other control shaft. Main shaft and one of control shafts mount gears which are in mesh with one another. EFFECT: reduced size and space requirement, enhanced reliability, mechanical stability, and safety in operation. 1 cl, 4 dwg