Patent GB-840851-A (GB)
Title: Apparatus for dispensing either one of two different liquids or alternatively mixtures in selected ratios of the two different liquids
IPC: B67D7/74
Filed: 1956-07-20
Abstract: 840,851. Mixing fluids in flow. SYMING- TON WAYNE CORPORATION. July 20, 1956 [Nov. 25, 1955], No. 22582/56. Class 86 [Also in Groups XVIII and XXIV] Apparatus for dispensing mixtures in selected ratios of two different liquids, such as a base petrol and a high grade petrol, comprises individual flow lines 18, 32, Fig. 2, pumps 4, 22, meters 14 and 30 and control valves 36, 38 for each of said liquids, and adjustable means 80, 82 operated by said meters for simultaneously controlling said valves to effect the delivery of said liquids in a preselected ratio. The pump 4 is driven by a motor and receives the base petrol through pipe 6 from a supply tank. The pump 4 is provided with a by-pass 8 having a relief valve 10 for recirculating the base petrol. The petrol is then delivered through a pipe 12 and meter 14 from which it is delivered through a pipe 18 containing a check valve 16. A pump 22 for the additive (e.g. high grade fuel) draws its supply from a tank through pipe 20. Pump 22 is similar to pump 4 and is provided with a by-pass 24 incorporating a relief valve 26. Pump 22 delivers the additive through a line 28 to a meter 30 and then through a pipe 32 having a check valve 34. The delivery of base and additive petrol through conduits 37 and 39 respectively is controlled by the valves 36 and 38. The meter 14 is connected to a variator 44 for setting the price of the base gasoline through mechanical connections 40 and 42. The meter 14 provides an input at 50 to the differential 52. The additive meter 30 provides an output at 54 which feeds a variator 58 in which the price per gallon of the additive is inserted to give an output at 64 corresponding to the total price of the additive. A connection at 60 feeds the differential 52 with the output of the additive meter 30. The differential 52 therefore sums the two quantities and provides an output to the total quantity counter 62. The differential 66 receives the outputs from variators 44 and 58, which represent the prices of the base and additive which are delivered. These prices are added by the differential and fed to the price counter 68, Fig. 1. The total gallons delivered and the price are exhibited through windows 62, 68 in the petrol pump as also are the base and additive price per gallon in windows 70, 72. The meters 14 and 30 provide inputs through mechanical connections 74 and 78 to corresponding gear boxes 80 and 82 which in turn, provide inputs to a differential 84 which through mechanical connections 86 controls the base and additive valves 36 and 38. The flow lines, pumps, meters are of conventional form. Also the variators and counter are generally of conventional form, with slight modifications in the counting arrangement. The connections 74, 78 drive shafts 88 and 90 on which are splined pinions 92 and 94 disposed in carriers 96 and 98. These carriers mount gears 100 and 102 which mesh with pinions 92 and 94. Cone gears 108, 110 are mounted on shaft 104 and 106 which gears mesh with gears 100 and 102 selectively. Also journalled on the shaft 88 and 90 are stirrup members 112 and 114 having arcuate plates 116 and 118 having helically arranged slots 120 and 122 which receive pins 124 and 126. Fixed plates 128 and 130 having steps 132 and 134 are arranged to locate the pins 124 and 126 in their various positions of adjustment in proper alignment with corresponding gear elements in the cone gear. Arms 136, 138 are arranged to be acted upon by springs 140 and 142 urging both the stirrups in an outward direction and the gears 100 and 102 toward meshing position. Links 144 and 146 are respectively connected to arms 136 and 138, joining them to the arms of a lever 148 secured to the shaft 150 carrying a handle 152 which may be rocked downwardly to disengage gears 100 and 102 from mesh. A shaft 156 also projects forwardly through the pump casing and carries a knob 154 having a dial 158 to indicate the quantity of the fuel to be delivered. Theshaft 156 has secured thereto a pinion 160 meshing with a rack 162 on which is secured a flanged member 164 embracing carriers 96, 98 to cause them to move lengthwise of shafts 88 and 90 when the rack is driven by rotation of knob 154. At the rear end of shaft 156 there is secured a disc 166 carrying a series of pins 168. The nose portion 170 of a lever 172 is arranged to pass between pairs of these pins and is provided with a pointed end having a cam action on the pins to enforce alignment of shaft 156 in particular position when alignment is produced. The arm 172 is secured to shaft 150. The shaft 156 carries helical gear 178 meshing with a toothed segment 180 having a pair of pins 182 the segment being journalled on a shaft 184 to which is splined a member 186 carrying a cone shaped pin 188 arranged to engage between the pins 182. The member 186 is circumferentially grooved for engagement by segmental members carried by link 190 pivoted on arm 192 carried by the shaft 150. A clutch arrangement is thus provided, the shaft 184 being clutched to the wheel segment 180 when the pin 188 is engaged between the pins 182. A pinion 194 is secured on shaft 184 meshing with member 196 secured to a shaft 198 and provided with an arm 200 which provides a part of valve driving connection referred to as 86. The required mixing ratio is preset by rotation of knob 154 on shaft 156 after first depressing lever 152. This effects approximate settings of the valves 236, 238 through shafts 184 and 198. More accurate settings of the valves are then effected during delivery by output from an epicyclic gear train 202-214 due to relative rotation between shafts 104, 106. A train of gears 222, 224, 226 connect the shaft 88 with an output connection leading to the counter which provides a connection from the base meter to the counter. A pin 230 projects from arm 200 and engages a slot of an arm 232 secured to a shaft 234 which serves to mount the spring engaged valve members 236 and 238 which are provided with cylindrical surfaces engaging the interior wall of a base in the valve housing 239. Ports 240 and 242 co-operate with the valves for the control of flow of fuel. The liquids are finally mixed in the nozzle 272.