FINAL CONTROL SWITCHING DEVICE Russian patent published in 2009 - IPC H01H35/14 

FIELD: electrical engineering.

SUBSTANCE: invention relates to final control switching devices threshold transducers of physical parametres intended for automatic anti-fire control of inflammable structures. Proposed device comprises housing, primary and secondary contact systems, cam and electromagnetic drive. Primary contact system incorporates a strap with current conducting strips that shares a common axle with afore mentioned cam to interact with the primary contact system contacts arranged along the circumference fitted on. The said cam interacts with secondary contact system contacts. Electromagnetic drive represents polarised relay with up-and-revolve armature and ratchet mechanism articulated therewith to effect one-way revolution of the axle whereon aforesaid strap and cam are rigidly fitted.

EFFECT: higher safety.

2 cl, 6 dwg