Self-locking switch motor

Claim 1

A SELF-LOCKING SWITCH FOR SWITCHING SYSTEMS COMPRISING AN ARM FOR CONTROLLING SWITCH BLADES AND ELECTROMECHANICAL OPERATING APPARATUS FOR MOVING SAID ARM INTO ONE OF TWO SELECTIVE POSITIONS AND LOCKING SAID ARM IN SAID SELECTED POSITION, SAID APPARATUS INCLUDING A PAIR OF SPACED SOLENOID COILS, AN ARMATURE EXTENDING BETWEEN SAID SOLENOID COILS AND SLIDABLY MOVABLE WITHIN SAID SOLENOID COILS, LOCKING MEANS INCLUDING A PIVOTALLY MOUNTED LOCKING BAR FOR ENGAGING SAID ARMATURE TO PREVENT SLIDABLE MOVEMENT OF SAID ARMATURE, RELEASING MEANS FOR RENDERING SAID LOCKING MEANS INEFFECTIVE TO PREVENT SAID SLIDABLE MOVEMENT OF THE ARMATURE, SAID RELEASING MEANS INCLUDING A PAIR OF AUXILIARY COILS AND A PAIR OF PIVOTALLY MOUNTED CONDUCTIVE LEVERS PIVOTABLE INTO ENGAGEMENT WITH SAID BAR FOR DISPLACEMENT THEREOF OUT OF LOCKING ENGAGEMENT WITH THE ARMATURE IN RESPONSE TO THE ENERGIZATION OF SAID AUXILIARY COILS.