Hydraulic governors

Claim 1

A HYDRAULIC GOVERNOR FOR CONTROLLING THE RATE OF SUPPLY OF LIQUID FUEL TO A VEHICLE INTERNAL COMBUSTION ENGINE OF THE KIND HAVING A MULTI-RATIO GEARBOX ASSOCIATED THEREWITH, THE GOVERNOR COMPRISING A BODY PART, A FLUID PUMP MOUNTED WITHIN SAID BODY PART AND ADAPTED TO BE DRIVEN BY THE ENGINE, A FLUID OUTLET FROM THE PUMP, A PASSAGE IN THE BODY PART CONNECTED TO SAID OUTLET, AN ORIFICE POSITIONED IN SAID PASSAGE AND ACROSS WHICH A PRESSURE DIFFERENCE WILL BE DEVELOPED WHEN FLUID PASSES THROUGH THE PASSAGEWAY, MEANS MOVABLE IN RESPONSE TO THE PRESSURE DOWNSTREA, OF SAID ORIFICE, THE POSITION OF SAID MEANS SERVING TO DETERMINE THE RATE OF SUPPLY OF LIQUID FUEL TO THE ENGINE, A FURTHER PASSAGE IN THE BODY PART, SAID FURTHER PASSAGE BEING CONNECTED IN PARALLEL WITH SAID ORIFICE, A FURTHER ORIFICE POSITIONED IN SAID FURTHER PASSAGE AND WHICH WHEN FLUID IS DELIVERED BY THE PUMP MODIFIES THE PRESSURE TO WHICH THE MEANS IS SUBJECTED, AND VALVE MEANS MOUNTED IN SAID FURTHER PASSAGE, SAID VALVE MEANS BEING OPERABLE TO PREVENT THE FLOW OF FLUID THROUGH SAID FURTHER ORIFICE WHEN A SELECTED RATIO OF THE GEARBOX IS ENGAGED.