THERMOBIMETAL SWITCH Russian patent published in 1997 - IPC

FIELD: overtemperature protection of motor windings in emergency conditions. SUBSTANCE: switch has electrically isolated conducting case and cover, bimetal and conducting clicking disks installed inside case and carrying movable contact in their central part, and fixed contact placed in central part of cover; novelty is that inner part of side walls of case is smooth, without steps and cover is equipped with spring-loading member in the form of shaped flexible ring resting on locking ring mounted within case. Other flexible locking ring supports cover. EFFECT: improved reliability. 2 cl, 4 dwg