Patent GB-960697-A (GB)
Title: Improvements in or relating to a coffee making system
IPC: A47J31/40
Filed: 1960-08-23
Abstract: 960,697. Coffee beverage making apparatus. R. C. NOYES. (O. A. Turman). Aug. 23, 1960, No. 29164/60. Heading A4D. [Also in Division H2] Coffee is prepared by passing hot water through an upper container containing fresh coffee grounds and a lower container containing partly spent coffee grounds after which the position of the two containers is interchanged, the first container meanwhile retaining the now partly spent coffee grounds and the second container being emptied to be refilled with fresh coffee grounds in the upper position. As shown, a set 12 of containers 17, 18 are carried on shafts 17A, 18A journalled for rotation in a rotatable disc 56 and carrying Geneva type wheels 17B, 18B whose notches engage pins 17F, 18F on spring biased arms 17C, 18C. Stationary pins 60, 61, 62, 63, 64, 65, 66, 67 mounted on the machine housing also engage the notches of wheels 17B, 18B so that, during a half rotation of disc 56, the lower container, e.g. 18, is inverted, emptied and rinsed by water from a nozzle 71 controlled by a solenoid valve 71A whilst the upper container, e.g. 17, remains substantially upright to retain partly spent coffee therein. On the next half rotation container 17 is emptied container 18 remaining upright. A second set 11 of containers 15, 16 are similarly mounted on a disc 55 rinsing water being supplied by a nozzle 70 controlled by a solenoid 70A. During the rotation of one disc coffee is made by flowing hot water through the containers on the other disc in succession. Ground coffee is delivered from hoppers 21, 22 to containers in the upper position by measuring containers 28, 29 operated by solenoids 34, 35. Hot water from tank 40 passes through an adjustable flow valve 48 to spouts 19, 20 from which it is dispensed to the upper containers through normally closed solenoid valves 50, 51. During coffee making, the hot water may be retained in either lower container by a stopper 100 or 101 carried on a shaft 103 controlled by a solenoid 109. A conduit 26 is set to receive the coffee beverage from either of the lower containers by a gear 94 meshing with a gear 92 connected by links 90L, 91L to the armatures of solenoids 90, 91 and delivers the coffee to a spout 27 beneath which a cup is placed. Motors 11M, 12M drive shafts 55A, 56A which each drive a shaft 162 carrying switching cams 164, 165, 166, 167, 168. Each adjustable two piece cam 164 operates normally open switches 11A or 12A and normally closed switches 11B, 12B to control the time during which hot water is dispensed. Cams 165, 166, 167, 168, control ground coffee feed, rinsing, conduit 26 and a dump relay circuit by operating switches 11C or 12C; 11D or 12D; 11E or 12E and 11F or 12F. The control is transferred from one of the motors 11M, 12M to the other by discs 140, 141, on shafts 55A, 56A, having pins 140A, 141A which engage a slidable bar 160 having a pin 160A which operates change switch 11G, 12G. Notches 180 degrees apart on discs 140, 141 co-operate with the actuating arms of switches 11H, 11J and 12H, 12J. In the position shown in Fig. 27, container set 12 is being rinsed while coffee is being made in set 11. Relay 120 is energized by depositing a coin or pressing a push button switch and closes a relay switch 120C to provide a holding circuit for itself and closes switch 120B to energize either motor 11M or 12M, in the case shown 12M, as switch 12G is closed and 11G is open. Motor 12M then starts the cycle corresponding to a 180 degrees rotation of shaft 56A meanwhile the switches are operated as follows:- solenoid 34 is energized when switch 12C is closed to dispense ground coffee, switch 12A is closed to energize solenoid 51 to dispense hot water to set 11, switch 123 opens and switch 12P closes to operate stopper relay 123 through normally closed dump relay switch 122D. Relay 123 closes switch 123A to provide a holding circuit for itself and closes switch 123B to energize stopper solenoid 109. Closure of switch 12D causes a rinse cycle to operate and switch 12E is operated to energize the solenoid winding 91 to move conduit 26 into position to receive the brewed beverage. Energization of either solenoid 90 or 91 operates normally open switches 90A, 90B or 91A, 91B and normally closed switches 90C or 91C. Closure of switch 91A forms a holding circuit for winding 91, closure of switch 91B energizes timing motor 128 and opening of switch 91C deenergizes the stopper solenoid winding. Motor 128 runs for a pre-determined interval and then opens switch 128A to deenergize the solenoid 91. A dump cycle during which no coffee is dispensed may be initiated by closing switch 127.