Tow truck switching system

Claim 1

IN A TOW TRUCK SWITCHING SYSTEM COMPRISING A REFERENCE SURFACE HAVING A MAIN SLOT INTERSECTED BY AT LEAST ONE SHUNT SLOT, A SWITCH PLATE ADJACENT SAID INTERSECTION, SAID WHICH PLATE BEING MOUNTED FOR ROTATION ABOUT AN AXIS GENERALLY PERPENDICULAR TO THE REFERENCE SURFACE FROM AN INOPERATIVE TO AN OPERATIVE POSITION, SAID SWITCH PLATE IN ITS OPERATIVE POSITION PRESENTING AN ABUTMENT SURFACE IN THE MAIN SLOT FOR CONTACT WITH A TOW PIN ON A TWO TRUCK TRAVELING ALONG SAID MAIN SLOT TO GUIDE THE TOW PIN INTO SAID SHUNT SLOT, AND SELECTIVELY OPERABLE MEANS ADJACENT SAID INTERSECTION INCLUDING A MEMBER DISPOSED TO ONE SIDE OF SAID MAIN SLOT, MEANS BIASING SAID MEMBER TO A NORMAL POSITION WHEREIN AT LEAST A PORTION OF SAID MEMBER EXTENDS ABOVE SAID REFERENCE SURFACE, MEANS MOUNTING SAID MEMBER AND ITS SUPPORT FOR MOVEMENT AGAINST THE EFFECT OF SAID BIASING MEANS INTO THE PLANE OF SAID REFERENCE SURFACE, MECHANICAL MEANS CONNECTING SAID MEMBER TO SAID SWITCH PLATE FOR ENABLING ROTATION OF SAID SWITCH PLATE TO ONE OF SAID POSITIONS IN RESPONSE TO CONTACT OF SAID MEMBER WITH A PORTION OF A TOW TRACK TRAVELING ALONG SAID MAIN SLOT.