GB119082A - Improvements in Suction Actuated Liquid Feed Apparatus. - Google Patents

Abstract

119,082. Marks, E. C. R., (Sparks-With. ington Co.). Sept. 19, 1917. Vacuum apparatus.-In suction-actuated liquidfuel supply apparatus wherein fuel is raised by suction from a main tank to an intermediate tank at a higher level whence it is discharged to the carburettor, the intermediate tank is divided by a partition 13 into chambers 8, 10, of which 8 is connected at 55 to the carburettor, and 10 is connected at 33 to the main fuel tank, at 25 to a source of suction, such as the engine induction pipe, and at 36 to the atmosphere. The connexions 25, 36 are provided with valves 23, 39 respectively which are actuated by a float 26 in accordance with the fuel level in the chamber 10. The float is mounted rigidly on the stem 22 of the valve 23 and carries a disk 48, to which two springs 49, 50 are connected. The other end of the springs 50 is connected to a flange 51 and that of the spring 49 to the outer end of a U- shaped lever 40 which is pivoted to depending portions 41. This lever engages loosely the stem of the valve 39 between enlargements 46, 47 thereon, and its upward movement is limited by a stop 52. Atmospheric pressure is transmitted to the chamber 8 through a pipe 53. As the fuel rises in the chamber 10, the float is raised and, when the disk 48 is above the pivot of the lever 40, the spring 49 causes the lever to snap over and open the valve 39. The valve 23 being closed or nearly closed, fuel is discharged through the nozzle 18 and non-return valve to the chamber 8. The float falls with the fuel level, the valve 23 is again opened, the spring 49 snaps the lever 40 downwardly to close the valve 39 and the chamber 10 is again filled with fuel. The valve 23 instead of controlling the suction connexion, may control the liquid inlet connexion 33. The cover 27 of the chamber 10 is secured by screws 32 to a flanged ring 28 the jointing face 30 of which has two thicknesses of metal, packing 31 being inserted. In a modified construction, the partition 13 instead of being secured as shown by soldering, welding &c., is inserted between flanges formed on the chambers 8, 10, the lower face 9 of the chamber 8 is flat instead of dome-shaped and the pipe 53 is situated outside the chamber 18.