Patent GB-425768-A (GB)
Title: Liquid dispensing apparatus
IPC: B67D7/16
Filed: 1933-09-21
Abstract: 425,768. Dispensing liquids. LENNARD, T., 83, Springmount Avenue, Toronto, Canada. Sept. 21, 1933, No. 26106. [Class 116] In an apparatus for dispensing liquids, particularly petrol, the liquid is pumped from an underground tank to an overhead container or from the latter through a meter and delivery hose in accordance with the position of a rotatable valve member controlled by a lever arm which supports the hose. The valve is rotated to the delivery position when the hose is removed from the arm and on replace ment of the hose the valve is rotated to its alternative position in which liquid is pumped to the overhead container until it reaches the level of an overflow pipe through which it flows to operate a switch cutting out the motor driving the pump. In one position of the valve 21, which is rotatable through links 52, 53, 54 from a shaft 55 operated by an arm 46, a pipe 11 from the underground tank is connected through a passage 23 and opening 7 in the valve casing 8 to the suction side of the rotary pump of which the pressure side is connected to a second opening 7 connected to a passage 24 having an outlet 12 to a pipe 13 leading to the overhead container 1. In the other position of the valve, a pipe 17 connects the bottom of the container 1 to a chamber 15 on the valve casing connected through a passage 21<a> to the suction side of the pump, the pressure side being connected by a similar passage 21b communicating with a chamber 16 connected by a pipe 18 to the meter 19 and delivery hose 20. The delivery operation is initiated by removal of the hose from a hook 47 on the arm 46 which moves upwardly under spring action and raises a pivoted lever 49, Fig. 17, so that the end of a lever 50 is lowered against a vertical rod 41 which is depressed against the action of a spring 44. The lever 41 which is latched in its depressed position by the hook 38 on the arm of a spring-biassed lever 37 operates a knifeedge switch closing the circuit of the motor operating the pump and forcing liquid from the container through the valve to the hose. If the container is to be filled prior to the delivery operation, the nozzle is replaced on the hook 47 after the motor has started and through the link members 52, 53, 54, the valve 21 is rotated to the position in which the underground tank and overhead container are connected through the pump. When the liquid in the container 1 has risen to a predetermined level, the overflow in passing from a pipe 29 to a pipe 31 through valve chamber 30 rotates a flap member 32 mounted on a shaft 33. A member 34, Fig. 9, actuates upwardly a horizontal arm 36, Fig. 17, of the bent lever 37 removing the latching hook 38 from the conical member 40 which allows the arm 41 to move upwardly, opening the motor circuit. When the hose is replaced after a delivery operation, the container 1 is automatically filled to the level of the overflow pipe whereupon the motor is cut out as described above. During the normal delivery operation, connection between the chambers 15, 16 of the valve chamber is cut off by a spring-loaded valve 26. In the interval between the closing of hose outlet valve and the operation controlled by the hook on replacement of the hose, the pressure built up in the delivery line through the motor opens the valve 25, 26, and liquid is byepassed through the pump. A float 65 closes the outlet pipe 17 of the container 1 when the liquid has reached a low level. The container 1 may be drained by a wing-valve 60 co-operating with orifices 58 and rotated by a manually-operated lever 62, external to the casing.