Combination trolley and switch

Claim 1

IN A POWER AND FREE CONVEYOR SYSTEM HAVING TROLLEYS WITH LOAD WHEELS RIDING ON A PAIR OF SPACED LOAD CARRYING RAILS OF THE TYPE HAVING A RAIL HEAD, A WEB AND A RAIL FLANGE, AND A SWITCH ZONE THROUGH WHICH THE TROLLEYS PASS FOR SELECTIVE SWITCHING TO ANOTHER PAIR OF SPACED LOAD CARRYING RAILS, SAID TROLLEYS HAVING GUIDE MEANS CONTACTING AND EXTENDING BELOW LATERAL INSIDE SURFACES OF SAID RAIL HEADS, SAID SWITCH ZONE BEING CHARACTERIZED BY STRUCTURE INCLUDING; A FRAME FOR SUPPORTING SAID PAIRS OF RAILS, AN ELONGATED LOAD CARRYING SWITCH TONGUE LOCATED AT THE JUNCTION OF SAID PAIRS OF RAILS, SAID SWITCH TONGUE HAVING AN ENLARGED END PORTION AND AN INWARDLY TAPERING BODY PORTION EXTENDING AWAY FROM SAID END PORTION, SAID BODY PORTION TERMINATING IN A SUPPORT LEG ADAPTED TO BE RECEIVED BENEATH SAID RAIL HEADS, SUPPORT PADS SECURED ADJACENT CUT-OUT PORTIONS OF SAID RAIL FLANGES FOR SUPPORTING SAID SUPPORT LEG WITH RESPECT TO SAID RAILS, SAID BODY PORTION BEING SHAPED TO PRESENT OUTSIDE LATERAL SURFACES BLENDING INTO LATERAL INSIDE SURFACES OF SAID RAIL HEADS FOR CONTACTING SAID GUIDING MEANS, SAID BODY PORTION HAVING AN UPPER LOAD BEARING SURFACE ALIGNING WITH THE LOAD BEARING SURFACES OF SAID RAIL HEADS AND TERMINATING IN A RAIL HEAD CONTACTING PORTION PROVIDING SUBSTANTIAL CONTINUITY OF SUPPORT SURFACE FOR SAID LOAD WHEELS, SAID SWITCH TONGUE BEING ROTATABLE INTO SWITCHING POSITIONS ABOUT AN AXIS EXTENDING THROUGH SAID ENLARGED END PORTION.