Patent GB-1344454-A (GB)
Title: Coin-freed vending machine
IPC: A47J31/40
Filed: 1971-06-23
Abstract: 1344454 Beverage dispensers CAFE-BAR INTERNATIONAL PTY Ltd 23 June 1971 [23 June 1970] 30449/70 Heading G4V  A beverage dispensing machine comprises a liquid dispenser, a plurality of normally inoperative solid ingredients dispensers, coin operated means for rendering at least said solids dispensers operative, auxiliary resetting means associated with all but one of said solids dispensers for returning a selection of said solids dispensers to the inoperative condition in consequence of a predetermined number of operations of any one of said solids dispensers with which the auxiliary resetting means is associated, and a main resetting means associated with said remaining dispenser such that operation of this dispenser causes any of said solids dispensers not as yet reset to be rendered inoperative. In one embodiment described the remaining dispenser is the liquid (hot water) dispenser which is manually controllable, and the solids dispensers are for powdered milk, sugar, coffee and tea, each of which may be operated twice before being rendered inoperative to allow the user to obtain a drink suitable to his taste. Each solids dispenser comprises a container 7 with a manually operable snap-acting valve in a spout 8 of the container. The valve is driven from a handle (12) (Fig. 1, not shown) via arms 10, 13 and spring 14, and may be locked in either of its at-rest positions by means of solenoid-controlled stop surfaces 16. On insertion of appropriate coinage a switch 31, Fig. 3, is temporarily opened, extinguishing all SCRs 20 and 21 that comprise three shift register circuits associated with sugar, milk and both tea and coffee respectively. As the SCRs are now non- conducting, transistors 22 will be suitably biased for conduction and the solenoids 15 will be energized to withdraw the stops 16 associated with each solids dispenser. When, for example, the valve controlling the flow of sugar is opened a switch 32S is temporarily changed over and a pulse generated by capacitor 33S is passed to the gate of SCR 20S and triggers it allowing a capacitor 35S to discharge through the SCR 20S so that a second pulse from the capacitor 35S on the further operation of the sugar dispenser may pass through diode 34S into the gate of SCR 21S and fire it. As SCR 21S is now conducting the bias is removed from the base of the transistor 22S which therefore becomes non-conducting, de-energizing the solenoid 15S and blocking further operation of this dispenser. A common circuit is used to control the solenoids 15T and 15C associated with the tea and coffee dispensers. On manual operation of a valve controlling the flow of hot water a switch 38W is opened causing a uni-junction transistor 39W to emit a stream of pulses that are fed to the gates of all the SCRs 21 thus de-energizing all solenoids 15 and blocking further operation of the solids dispensers. In another embodiment (Figs. 4 to 6, not shown) the dispensation of the solid ingredients, in this case soup concentrate powders, is controlled by solenoid operated valves, that may be actuated by push-buttons (61) to (63). On the insertion of coinage a switch (56) is temporarily closed energizing holdin relays (58) and (59) and conditioning the solenoids (49) to (51) for energization on depression of the corresponding push-button. If say push-button (61) is depressed the solenoid (49) is energized through switches (61Y), (604) and (58A), and a timer is also energized through switch (61X). At the end of a time period controlled by a resistor 66 a relay (60) is energized by the timer to open switch (60A) and de-energize the solenoid controlling dispensation. A sequence relay 166 is also energized through switch (61Y) and serves to de-energize relay (59) by opening contacts (166B) and hence preventing further operation of solenoids (49) to (51). Further dispensers for salt and pepper, controlled by solenoids (52) and (53) may be provided, these being operated at will by the user providing that coinage has been inserted. Actuation of the hot water dispenser opens a switch (57) de-energizes relay 58 and removes the supply from all dispensers until further coinage is inserted.