Patent GB-632565-A (GB)
Title: Improvements in or relating to liquid dispensing apparatus
IPC: B67D1/00
Filed: 1944-04-11
Abstract: 632,565. Dispensing beverages. COCA-COLA CO. April 11, 1944, No. 6640. Convention date, March 22, 1943. [Class 116] [Also in Groups II, XXVIII and XXIX] In apparatus for dispensing beverages one liquid is discharged through a valve, under pressure, which pressure is used to discharge another liquid through a separate discharge aperture. Flavouring syrup is discharged under the pressure of carbonated water by means of a metering device. The apparatus shown is operated by placing the tumbler for receiving the beverage under the nozzle 35, the tumbler engaging a bracket which depresses the nozzle 35 and thus also tubes 30, 31 and a valve 33, which connects a duct F leading to a supply of carbonated water to passages leading down outside the nozzle 35 and also to the metering device by a pipe 98. The tube 30 is lowered away from a valve 40 and syrup is supplied from a chamber S to the nozzle 54, under the pressure of the carbonated water by means of a metering device C. The pipe 98 leads the carbonated water to the extension of a flexible fluid cell 85 of the metering device and the pressure exerted on the cell 85 is transferred through a metering nozzle 89 to a flexible cell 82 which exerts pressure on a piston 81 operating on the syrup in the chamber S. To reduce the pressure of the carbonated water without turbulence the apparatus comprises a discharge duct, having nested frustro-conical members, which is one modification of the invention of Specification 621,105. When the tumbler is filled and removed a spring 36 returns the parts to normal position, recloses the valve 33 and also the tube 30 is raised again and closes the valve 40 which is also raised and opens a valve 65 to admit more syrup to the chamber S. The metering nozzle 89 comprises a frustoconical bore disposed within which is a frusto-conical adjustable plug 90. Water passes from the cell 85 to the cell 82 through the adjustable annular passage between the bore and the plug but flows in the reverse direction through passages 95, 96 and a non-return rubber band valve 97 as well as the annular passage, thus permitting rapid retraction of the piston 81. In an apparatus for dispensing any one of several flavouring syrups the carbonated water is supplied through pressure-reducing frustb-conical members 118<SP>1</SP>, Fig. 7, under the control of a valve 114 and the syrup is supplied from one of a number of tubes 125 arranged around the carbonated water supply. Carbonated water is supplied from the chamber of the valve 114 by a pipe 142 to the metering device C<SP>1</SP> which exerts pressure on the syrup in a chamber 131a which it forces through a pipe 1311 to the tube 125. An electro-magnet 147 is adapted to depress the tube 125 to open a valve 133 thus admitting syrup under pressure from the metering device to the tube 125. A valve 135 is simultaneously closed, this valve normally connects the chamber 131 to a source of syrup supply through a tube 130. A collar 126 on the tube 125 simultaneously opens the valve 114 by means of the stem 120 and a sleeve 123.