Patent GB-866680-A (GB)
Title: Improvements in and relating to coffee vending machines
IPC: G07F13/06
Filed: 1958-03-03
Abstract: 866,680. Control of several motors. AUTOMATIC CANTEEN CO. OF AMERICA. March 3, 1958 [April 24, 1957], No. 6691/58. Class 38 (3). [Also in Groups VI and XVIII]  A coin-freed automatic coffee-making machine comprises means for rotating a coffee-brewing vessel 230 to which is fed a metered amount of ground coffee and then hot water to brew coffee which is transferred through a conduit 392 to a storage vessel 76 from which it is vended in small predetermined quantities. The hot-water tank 152 contains thermostatically-controlled electric heating elements 408, 410, 412 and the brewing apparatus comprises a vessel 230 mounted on a rotatable base-plate 234. A water manifold 310 is connected to a hot-water supply line 314 connected through a solenoid valve to the hotwater tank 152 to cold water supply line 322 with solenoid valve 324 communicating with conduit 326 connected to a cold-water supply and to brewing vessel 230. Base-plate 234 is mounted on a plate 228 and carries pivoted arms 236 which hold the lid 232 of vessel 230 shut integral with a member 244 which engages camming plate 258. During rotation of plate 234, a pin 263 on lid 232 engages behind a strip 260 on plate 228 and a notch 266 thereon engages a pin 264 mounted on a pivoted spring- biased arm 332 and projecting through an aperture in plate 228 to operate switch 340, a second pin 264 being similarly mounted. A brewing cycle is initiated when the level in tank 76 falls below an electrode 454, Fig. 10, and a relay 444 is energized to open switch 450 and move switches 458 and 460 to complete a circuit through a normally closed solenoid switch 468 actuated by a waste tank relay 470. Motor 480 which is energized at the same time, momentarily closes switch 482 at the end of the brewing cycle. A circuit is also completed through a manually-operated valve switch 488 normally positioned as shown and a cold-water inlet solenoid valve 148 through which tank 152 is replenished to replace the hot-water drawn off. Meanwhile motor 308 begins to rotate plate 234 and pin 262 causes switch 340 to engage contact 494 and as it rotates vessel 230 receives coffee grounds and has its lid closed and held. The plate 234 continues to rotate until recess 266 allows pin 264 to move and place brew switch 500 in contact with contact 504. This de-energizes motor 308 and energizes the circuit containing hot water solenoid valve 508 which opens the hot-water line to the brewing vessel 230 from which it passes to storage tank 76. Switch 482 allows for the operation up to the end of the brewing cycle and is then closed to return switch 460 to its original position which energizes motor 308. When rotation of plate 234 is resumed switch 500 returns to the position shown, lid 232 opens over waste tank 160, and a rinse switch 514 operated by a notch in a ring on the back of plate 234 actuates a rinser valve 324 in the cold water line to supply the rinsing water. Rotation of plate 234 continues until recess 266 allows pin 262 to move returning switch 340 to its original position and de-energizing motor 308. The cycle is repeated when the level in tank 76 again falls below electrode 454. Tank 76 has a safety electrode 530 which shorts the brewing relay 444 to prevent it from overflowing if some component in the circuit fails. Waste tank 160 has dual electrodes which prevent further brewing cycles until the tank has been emptied by opening switch 468. A timer 422 with a clock motor 420 operates a switch 426 to stop the machine at night and during week-ends, switch 426 engaging pole 560 at the end of operation to energize a solenoid drain valve 84 to empty tank 76. The vending circuit is connected to the power supply through waste tank switch 468 and on depositing a coin, switch 602 is closed and a master relay 604 is connected across the power supply to close switches 618, 620 and the circuit including motor 622 and the switch 628 of an antijackpot relay is energized. Motor 622 drives a shaft, carrying cams which govern the dispensing operation by operating the following switches: a timer motor cycle switch, coin lock-control switch, cup-vending switch 642, master relay-control switch 644, anti-jackpot control switch 646, chocolate control switch 648, extra cream switch 650, cream switch 652, sugar switch 654, and coffee vending switch 656. Switch 640, in one position engaging contact 680, as shown, energizes coin lock coil 670 and allows the machine to accept a coin deposited therein but when the switch 640 is moved to its other position coil 670 is de-energized and a coin deflector bar returns coins inserted to the customer. If the cup supply is exhausted switch 666 moves to contact 676 and de-energizes coil 670 again returning inserted coin. When motor 622 begins to rotate the circuit to coil 670 is broken and a new circuit is completed through relay control switch 618 and anti-jackpot relay control switch 628. The cup-vending switch 642 is then closed and a cup is dispensed, a counter being actuated during this operation. The chocolate and coffee switches 648 and 656 respectively are closed and the machine will dispense coffee or chocolate depending on which has been selected by means of the double-pole selector switch 710 with coffee and chocolate contacts 712 and 714, operated by an indicator on the door. Sugar and cream switches 716 and 718 are operated by the indicator and extra sugar and extra cream switches 722 and 720 are operated by buttons. If coffee is selected, switch 710 engages contact 712, master-relay control switch 644 and master relay 620 are connected in a circuit including coffee-control switch 656 and a solenoid 82 of the solenoid valve in the coffee-vending line, the latter permitting coffee to be discharged under gravity from tank 76. On further rotation of motor 622, extra cream, cream and sugar control, switches 650, 652 and 654 are closed and, if switch 716 has also been closed, motor 762 starts to operate. If extra sugar button is held, extra sugar motor 768 operates and nearly twice as much sugar is dispensed. The cream dispensing is operated by a motor 776 if switch 718 has been closed and if the extra cream button is held the motor is energized for a further period of time. Liquid cream and sugar may be used instead, dispensed through solenoid valves. After about three-quarters of the revolution of shaft of motor 622, master relay switch 644 is opened momentarily to de-energize solenoid 604 of master relay opening switches 618, 620. Timer motor cycle-switch 640 remains closed and the timer motor remains energized and anti-jackpot control switch 646 engages contact 790. If relay 604 has remained energized due to a fault, switches 618, 620 remain closed and a circuit is completed from master relay 620 through jackpot solenoid 792. When the latter is energized, switch 628 is opened and switch 800 is closed which respectively stop motor 622 and complete a circuit to sold-out indicator 802. Otherwise, if the machine is not defective, switch 646 and contact 790 have no effect and the timer motor 622 continues until cut off by switch 640 moving into contact with contact 680, coil 670 being energized so that further coins may be inserted. As long as waste tank relay switch 468 is closed, a motor operates a blower to ventilate the cabinet. A test switch 26 starts a vending cycle in the same way as a coin.