GB1413869A - Dispensing apparatus - Google Patents

Abstract

1413869 Reciprocating pumps AUTOBAR SYSTEMS CORP 2 Aug 1973 [7 Aug 1972] 36749/73 Heading F1A Apparatus for dispensing measured quantities of beverage comprises a pump 60 with a piston 26 moved on its discharge stroke by hydraulic or pneumatic pressure at connection 34, and on its suction stroke by a spring 32, liquid entering cylinder 24 from a reservoir 11 via hinged check-valve 25 and being delivered to a receptacle 31 via a solenoid delivery valve 29. To initiate a dispensing cycle, a switch 51 is closed thereby energizing relay 55 to move switch 56 to its dotted position to open delivery valve 29 and energize solenoid 36 which moves valve 37 to supply pressure fluid to move piston 26 on its delivery stroke. A knob 49 on a switch 46 is previously moved to select a contact 47 corresponding to a required delivery quantity. When piston 26 moves on its discharge stroke, the piston-rod 28 moves a contact 44 of a switch 42, via arm 39, rack 38 and pinion 41, the discharge stroke being terminated when moving contact 44 engages a fixed contact 43 electrically connected to the contact 47 selected by switch 46, such engagement re-energizing relay 55 to return switch 56 to its position shown in solid line, thereby closing delivery valve 29 and de-energizing solenoid 36 to move valve 37 to vent the actuating side of piston 26. Spring 32 then effects the suction stroke of piston 26 to draw beverage into cylinder 24, switch 42 being returned to its rest position. Switch 51 is disabled during the discharge stroke. When the level in reservoir 11 falls to a predetermined point, a magnet 21 in float 19 actuates a reed switch 22 which opens the circuit of relay 55 to prevent operation of the apparatus, and lights an indicator lamp 23. Lamps 57 and 52 indicate connection of the apparatus to the electricity supply, and movement of the pump on its discharge stroke, respectively. A counter 90 indicates the number of dispensing cycles.