Crane cable way for slopes with a single pulling and hoisting cable passing through the trolley

Claim 1

IN A HOISTING-AND-CONVEYING CABLEWAY FOR LOADS, THE COMBINATION WITH A SUPPORTING CABLE, A TROLLEY MOUNTED ON THE LATTER AND A POWER-DRIVEN CABBE WINCH POSITIONED ADJACENT SAID CABLE, OF A SINGLE PULLING-AND-HOISTING CABLE EXTENDING FROM THE WINCH TO THE TROLLEY AND PASSING THROUGH THE LATTER AND TERMINATING IN A LOAD HOOK, SAID TROLLEY BEING STRESSED IN OPERATION BY THE LOAD HANGING THEREFROM AND BY FORCES APPLIED THERETO THROUGH SAID PULLING-AND-HOISTING CABLE, SAID PULLING-AND-HOISTING CABLE BEING ADAPTED TO MOVE THE TROLLEY IN BOTH DIRECTIONS ALONG THE SUPPORTING CABLE, LOAD-HOOK HOLDING-AND-LOWERING MEANS PIVOTALLY MOUNTED ON THE TROLLEY, CLAMPING MEANS MOUNTED ON THE TROLLEY FOR LOCKING SAME TO THE SUPPORTING CABLE AT ANY DESIRED POINT THEREOF, SAID CLAMPING MEANS BEING ADAPTED TO BRING ABOUT A PRELIMINARY CLAMPING STAGE AND A MAIN CLAMPING STAGE OF THE TROLLEY ON THE SUPPORTING CABLE, A MECHANICAL CONTROL DEVICE MEANS MOUNTED ON THE TROLLEY AND ADJUSTABLY FOR SETTING SAID CLAMPING MEANS TO THE PRELIMINARY CLAMPING STAGE, THE PRELIMINARY CLAMPING STAGE BEING TRIPPABLE BY SAID CONTROL DEVICE AND SAID MAIN CLAMPING STAGE BEING BROUGHT ABOUT BY THE LOAD AND BY SAID FORCES ACTING ON THE TROLLEY, MEANS FOR MOVING AND HOLDING THE CLAMPING MEANS CLEAR OF THE SUPPORTING CABLE WHEN THE TROLLEY IS IN MOTION, AND A MECHANICAL SEQUENCE SWITCH MOUNTED ON THE TROLLEY AND OPERATIVELY CONNECTED TO THE CONTROL DEVICE AND THE LOADHOOK HOLDING-AND-LOWERING MEANS AND THOSE PARTS OF THE CLAMPING MEANS WHICH BRING ABOUT THE PRELIMINARY CLAMPING STAGE; SAID SWITCH BEING ADAPTED TO COERCIVELY ATTAIN AN APPROPRIATE SEQUENCE OF THE FUNCTIONS NECESSARY FOR THE CLAMPING AND UNCLAMPING ACTIONS.