Latching mechanism for electroresponsive relay

Claim 1

A LATCHING DEVICE COMPRISING: (A) A MOVABLE MEMBER HAVING A NORMAL POSITION AND ANOTHER POSITION DISPLACED FROM SAID NORMAL POSITION INTO WHICH SAID MEMBER MAY BE LOCKED; (B) AND LATCHING MEANS FOR AUTOMATICALLY LOCKING SAID MOVABLE MEMBER WHEN MOVED TO SAID OTHER POSITION TO PREVENT RETURN THEREOF OF SAID NORMAL POSITION UNTIL IT IS RELEASED COMPRISING: (C) A MEMBER PROVIDED WITH AN APERTURE THERETHROUGH AND AT LEAST ONE SIDE OF SAID APERTURE HAVING A SURFACE AT AN ANGLE TO THE DIRECTION OF MOVEMENT OF SAID MOVABLE MEMBER SO THAT THE OPPOSITE SIDES OF SAID APERTURE CONVERGE IN ONE DIRECTION AND DIVERGE IN THE OPPOSITE DIRECTION; (D) A BALL CARRIAGE PARTLY WITHIN SAID APERTURE AND HAVING A HOLE THERETHROUGH FOR ACCOMMODATING AND MOVABLE MEMBER FOR FREE MOVEMENT RELATIVE TO SAID BALL CARRIAGE AND BEING PROVIDED WITH AT LEAST ONE BALL CONFINING OPENING BETWEEN SAID MOVABLE MEMBER AND SAID ANGULAR SURFACE AND A BALL ROTATABLY ACCOMMODATED IN SAID OPENING HAVING A DIAMETER GREATER THAN THE THICKNESS OF THE WALL ADJACENT SAID OPENING; (E) RESILIENT MEANS BIASING SAID BALL CARRIAGE IN SAID ONE DIRECTION;