Cross-over device for dragline systems

Claim 1

A CROSS-OVER DEVICE FOR USE AT THE INTERSECTION BETWEEN MAIN AND BRANCH GUIDE SLOTS OF A DRAGLINE SYSTEM FOR CONVEYING THE DRIVE PIN OF A CARRIER TRAVELLING IN THE BRANCH SLOT ACROSS PROPELLING MEANS TRAVELLING BELOW THE MAIN SLOT, SAID CROSS-OVER DEVICE COMPRISING A CROSS-OVER MEMBER, MEANS MOUNTING THE CROSS-OVER MEMBER ADJACENT THE INTERSECTION OF THE GUIDE SLOTS FOR MOVEMENT BETWEEN FIRST AND SECOND POSITIONS, SAID CROSS-OVER MEMBER HAVING A DRIVE PIN ABUTMENT SURFACE WHICH IN SAID FIRST POSITION OF MOVEMENT EXTENDS INTO THE PATH OF TRAVEL OF A DRIVE PIN ADVANCING TOWARD SAID INTERSECTION IN SAID BRANCH SLOT, SAID CROSS-OVER MEMBER HAVING A DRIVE PIN SUPPORTING LEDGE BELOW SAID ABUTMENT SURFACE AND ABOVE SAID PROPELLING MEANS, SAID SUPPORTING LEDGE BEING DISPOSED IN ADVANCE OF SAID ABUTMENT SURFACE IN THE DIRECTION OF TRAVEL OF SAID DRIVE PIN TOWARDS SAID INTERSECTION, MEANS NORMALLY URGING SAID CROSS-OVER MEMBER TO SAID FIRST POSITION, AND MEANS FOR GUIDING SAID ADVANCING DRIVE PIN ONTO SAID SUPPORTING LEDGE FOR ENGAGEMENT WITH SAID ABUTMENT SURFACE WHEREBY FURTHER ADVANCING MOVEMENT OF SAID DRIVE PIN IN CONTACT WITH SAID ABUTMENT SURFACE IS ACCOMPANIED BY MOVEMENT OF SAID CROSS-OVER MEMBER FROM SAID FIRST TO THE SECOND POSITION THEREOF IN WHICH SAID PIN SUPPORTING LEDGE EXTENDS ABOVE AND BEYOND SAID PROPELLING MEANS.