Spraying apparatus

Claim 1

A RAILWAY VEHICLE ADAPTED FOR SPRAYING RAILWAY TRACKS WITH CHEMICAL WEEDKILLER, SAID VEHICLE ESSENTIALLY COMPRISING IN COMBINATION: (A) THREE GROUPS OF OUTLET ELEMENTS ONE GROUP BEING ARRANGED TO SPRAY CHEMICAL WEEDKILLER OVER THE WIDTH OF THE TRACK AND THE OTHER TWO GROUPS EACH BEING ARRANGED TO SPRAY CHEMICAL WEEDKILLER RESPECTIVELY OVER THE STRIP ON ONE SIDE OF THE TRACK; (B) EACH GROUP OF OUTLET ELEMENTS BEING CONNECTED THROUGH A MIXING DEVICETO AN AXLE-DRIVEN METERING PUMP AND (C) EACH OF SAID METERING PUMPS CONNECTED TO A MECHANICALLY AGITATED STORAGE TANK; (D) MEANS FOR PRODUCING A CHEMICAL WEEDKILLER COMPOSITION IN FLUID FORM; (E) SAID MEANS HAVING A SUPPLY LINE TO AT LEAST ONE TANK WAGON CARRYING WATER AND (F) A SUPPLY LINE TO AT LEAST ONE TANK WAGON CARRYING CHEMICAL WEEDKILLER CONCENTRATE; (G) MEANS FOR FEEDING SAID FLUID WEEDKILLER COMPOSITION TO EACH OF SAID STORAGE TANKS; (H) AN ENGINE-DRIVEN CENTRIFUGAL PUMP HAVING A SENSITIVE LONG STROKE RELIEF VALVE; (I) A SUPPLY LINE FROM SAID ENGINE-DRIVEN PUMP TO AT LEAST ONE TANK WAGON CARRYING WATER; AND (J) A SUPPLY LINE FROM SAID ENGINE-DRIVEN PUMP TO EACH OF SAID MIXING DEVICES, THE ARRANGEMENT BEING SUCH THAT SAID FLUID CHEMICAL WEEDKILLER COMPOSITION DRAWN FROM EACH OF SAID STORAGE TANKS BY EACH OF SAID METERING PUMPS IS FED RESPECTIVELY INTO THE WATER SUPPLY TO EACH GROUP OF OUTLET ELEMENTS ON THE PRESSURE SIDE OF SAID ENGINE-DRIVEN PUMP, HENCE ENABLING THE QUANTITY AND KIND OF CHEMICAL WEEDKILLER DISPENSED FROM EACH GROUP OF OUTLET ELEMENTS TO BE VARIED.