Patent GB-855898-A (GB)
Title: Improvements in or relating to apparatus for dispensing and pricing selected blends of two liquids
Inventor: YOUNG EINAR TAGE
IPC: B67D7/74
Filed: 1958-12-09
Abstract: 855,898. Mixing liquids. SYMINGTON WAYNE CORPORATION. Dec. 9, 1958, No.. 39746/58. Class 86 [Also in Group XIX] In liquid dispensing- apparatus adapted to supply a selected one of a plurality of mixtures of two liquids called base and additive, a variator is set inaccordance with the desired price of the base and selective gearing is set to correspond to the various prices of mixtures which may be dispensed, a particular one being selected for each dispensing operation, the output being summed in a differential with that of the variator to drive a price counter. As shown in Fig. 1, pumps 4, 22 supply base and additive, the flows passing through meters 14, 30 which have first outputs 40, 44 fed to a differential 42 which provides an indication of the toal liquid flow at 48 and to feed a representation of the total flow to a variator 52 and to selective gearing 60, the variator and gearing 60 being adjusted to provide at 66 an indication of the total price of the liquid dispensed. Second meter outputs corresponding to base and additive flow are fed to a differential 80 whose output adjusts valves 36, 38 in the liquid supply lines if the flows are not in the required ratio as set in gear boxes 72, 74. The base meter drives a coupling 92, Fig. 3, which via gear 96 drives a counter indicating the total base flow and via a gear 98 drives one input to the differential 42, the other input being from an additive coupling 104 via gears 106, 108, 110, the output of the differential representing total flow being a shaft 100 which drives a total flow counter via a pinion 118. The shaft 100 also drives via additional gears and a shaft 116 selective gearing, Fig. 8, the output of which on a shaft 122 serves as one input to a differential 56, the other input to the dieffrential being from the gear 120 which constitutes the output from the variator 52. The gear 98 representing base flow drives also via gears 132, 134, 136, the input shaft 138 to the base gear box 72, Figs. 1 and 4, the additive gear box 74, Figs. 1 and 3, being driven by a shaft 140. The shafts 138, 140 carry gear cones with take off gears 145, 146 adjusted as described below, which gears drive input shafts to the differential 80, Figs. 1 and 4 the output of which is geared, via a clutch 164 which slips if overloaded, an arm 168 controlling the base and additive valves 36, 38, Fig. 1. The arrangement is such that the flow is controlled to the ratio determined by the settings of the gear boxes 72, 74. Adjustment for the particular mixture required of a shaft 320, Fig. 11, effects simultaneous adjustment of the take off gears 145, 146 and of the valve control arm 168. The variator 52 is set by arms (Fig. 5, not shown) which control the rotation of shafts 196, 204, 210, Fig. 6, in amounts proportional to the tens, tenths and units respectively of the price corresponding to which the variator is set. These rotations are transmitted to the appropriate denomination of the various three-denominational counters shown in Fig. 6, all the counters, except the right-most one having additional amounts set into their tenths wheels by an operator by means of gears 240, the amounts corresponding to the desired incremental prices of the various mixtures. A duplicate set of counters is provided on the opposite side of the pump as shown in Fig. 8, the shafts carrying the gears 240 extending diagonally to ensure that the lowest order wheels of both sets of counters are actuated. A movable mask is provided to exhibit the price of the selected mixture only. The input to the selective gearing is from a shaft- 286 rotated in accordance with the total liquid flow and carrying a plurality of gears 288 which may be engaged with corresponding gears 294 on the output shaft 122. When setting the incremental prices by means of the wheels 240, slides 310 are traversed to position eight collars 304 splined on a shaft 302 the collars bearing cam projections spaced at 40 degrees intervals round the shaft 302. A further cam projection is arranged to move a member to lock the shaft 122 against rotation when base only is delivered. Thus in each of the nine rotary positions of the shaft 302 just one cam is effective to connect corresponding gears 288, 294 driving the shaft 122 or to lock the shaft 122 providing an appropriate output on the shaft 122 to drive the second inputto. the differential 56. The shaft 302 is driven by gearing from the shaft 320, Fig. 11. The shaft 320 may be rotated by an exterior knob and carries a gear 334 having nine equally spaced pins 336 between pairs of which the nose of a lever 340 engages, which lever is rocked counter clockwise by an exterior handle before the shaft 320 is rotated. The gear 334 drives the cord and pulley mechanism for moving the mask which exhibits the selected price only. A shaft 368 is spring biased to the position shown in Fig. 11 but when the pump, nozzle is removed for a dispensing operation moves clockwise, arms 376, 376<SP>1</SP> move behind the lever 340 to prevent alteration of the setting of the shaft 320. The clockwise movement of the shaft 368 also moves links 390, 392 to operate switches 394, 396 for the base and additive pumps. Means are provided when base alone or additive alone is dispensed to actuate only the appropriate switch 394, 396. Specification 840,851 is referred to.