Patent GB-906593-A (GB)
Title: Preselector mechanism for liquid dispensing apparatus
IPC: B67D7/08
Filed: 1959-01-12
Abstract: 906,593. Dispensing liquids. VEIDER-ROOT Inc. Jan. 12, 1959 [Jan. 21, 1958], No. 1020/59. Class 116.  A pre - settable control apparatus for liquid dispensing mechanisms of the type having a shut-off valve 14, Fig. 13, and a register 22, comprises a valve control member 72, tripping mechanism 77, Fig. 5, for releasing the member 72, a plurality of actuators 113, 113a, Fig. 7, driven by the register for actuating the tripping mechanism at different predetermined readings of the register, and manually operated means 134, 134a for conditioning the tripping mechanism for operation by a selected actuator. The register has a set of numeral wheels indicating the cost of the liquid delivered and a set indicating the quantity and shafts 33, 34, Fig. 5, from the register rotate members 112, 112a, carrying cams 113, 113a in accordance with the cost and quantity numerals, the cams being arranged to correspond to predetermined values and quantities of liquid delivered. Prior to dispensing, the spring-loaded shaft 72 is moved to a cocked position, in which the valve 14 is open, and is held by a latching lever 77 engaging a latch 74 on shaft 72. To dispense a predetermined amount, the control lever 26, Fig. 1, is moved to a vertical position, which switches on the pump P, Fig. 13, and a pushbutton 141, Fig. 1, is pressed corresponding to a desired cost. This operates a member 137 to rotate the appropriate lever 131 to move roller 134 into a position to be actuated by the appropriate cam 113. When the requisite amount has nearly been dispensed, cam 113 actuates, through the selected roller 134, a release lever 83 which moves latching lever 77 off shoulder 75 of member 74 to permit shaft 72 to turn until a second shoulder 76 contacts latch 77, whereby valve 14 is partially closed and the rate of feed for the final fraction dispensed is reduced. The rotation of the member 74 moves a stop 80 away from a spring-loaded freely-pivoted lever 82 and allows an arm 82c thereof to contact a snail cam 85 driven from the cost numerals of the register. When the final fraction has been dispensed a step in the cam 85 frees the lever arm 82c and lever 82 moves the latch member 77 off the shoulder 75 and permits shaft 72 to rotate to completely close the valve 14. The lever 26, Fig. 1, is then returned to horizontal position to cut off the pump and this rotates shaft 40, Fig. 5, to operate cocking lever 100 to return shaft 72 to the cocked position. The rotation of the shaft 40 also prepares the register for zeroizing which occurs when the zeroizing button 160, Fig. 1, is depressed. During the zeroizing a shaft 122, Fig. 5, is rotated to return the members 112, 112a to their starting position. The shaft 112a carries cams corresponding to predetermined quantities and is brought into operation if a quantity button 141a, Fig. 1, is pressed instead of a cost button. The operation of shaft 112a is the same as shaft 112, the selected cam 113a causing release of the latch lever 77 through levers 93, 92, co-operating with a snail cam 87 rotated by the quantity numerals. The selected member 131 or 131a is held in its operative position by spring-loaded latches 150, 150a, and released during re-setting. The shaft 72 may be re-cocked, to permit selection of an additional quantity after dispensing of a first selected quantity, by a pull-ring 103, Fig. 1, which operates shaft 72 through a one-way connection and also operates the latches 150, 151, Fig. 7, to release the members 131, 131a. In a modification, Fig. 14 (not shown), the members 112, 112a are spring-loaded and are operated from the register through pawl and ratchets which are released to permit the members 112, 112a to be returned by the springs to their starting positions. The register may be of the type described in Specification 776,014.