Safety shut-down device for valves on mobile tanks

Claim 1

IN A FLUID DISPENSING APPARATUS, THE COMBINATION COMPRISING: (1) A TANK CAR HAVING A DISPENSING VALVE COMMUNICATING AN OUT-OF-TANK PASSAGEWAY WITH THE INTERIOR OF SAID TANK, SAID VALVE BEING POSITIONED INTERMEDIATE ENDS IN THE BOTTOM THEREOF AND HAVING MEANS BIASING SAME CLOSED, THE BIASING MEANS BEING OPERABLE BY A STEM EXTENDING TO AN OUT-OF-TANK POSITION TO OPEN SAID VALVE; (2) A CAM AND SHAFT MEANS SUPPORTED ADJACENT THE OUTER END OF THE STEM OF (1) SO THAT OSCILLATION OF SAID CAM AND SHAFT ALTERNATELY MOVES SAID STEM LONGITUDINALLY SO AS TO OPEN SAID VALVE AND THEN TO ALLOW SAID BIASING MEANS TO CLOSE SAME; (3) LEVER MEANS FOR OPERATING THE CAM AND SHAFT MEANS OF (2); (4) A LOCKING SHOULDER ON THE CAM OF (2) FOR HOLDING SAME IN POSITION ACTUATING SAID STEM TO OPEN SAID VALVE; (5) A PIN SUPPORTED IN ALIGNMENT WITH THE CAM OF (2) SO AS TO BE RECIPROCABLE INTO AND OUT OF LOCKING ENGAGEMENT WITH THE SHOULDER OF (4); (6) MEANS BIASING THE PIN OF (5) INTO LOCKING POSITION; (7) MECHANICAL LINKAGE CONNECTING THE PIN OF (5) WITH A REMOTE OPERATING MEANS AT ONE END OF SAID CAR; AND (8) OPERATING MEANS AT THE OTHER END OF SAID CAR CONNECTED TO MECHANICAL LINKAGE WITH THE PIN OF (5), INCLUDING A CABLE CONNECTED WITH SAID PIN THRU A DIRECTION REVERSING MEANS.