Patent GB-943212-A (GB)
Title: Preselector mechanism for liquid dispensing apparatus
IPC: B67D7/08
Filed: 1960-03-08
Abstract: 943,212. Dispensing liquids. VEEDER-ROOT Inc. March 8, 1960 [March 17, 1959], No. 8120/60. Addition to 906,593. Heading A4T. In a pre-settable liquid dispensing apparatus having flow control means e.g. valve 15, Fig. 12, and a register 20 having a set of number wheels rotatable on a shaft transverse of the register frame, the valve is connected through shaft 32 to a control member 34, Fig. 6, retained in a first predetermined position by a pawl 35 which may be released at a preselected setting of the register by a cam 56, Fig. 7, and a movable stop 131, Fig. 6 engaging lever 130 pivoted on the control member holds the member in a second predetermined position, a second register driven cam retaining the stop in holding position but releasing the stop during its final revolution. On rotating shaft 43 clockwise to switch off motor 11 driving pump 10 at the end of a dispensing operation and to reset the register spring lever 42 moves lever 40 from its dotted to its full line position to rotate the shaft 32 and member 34 so that pawl 35 snaps into shoulder 38 and holds valve 15 open against its closing spring. Shaft 43 also rotates cam 81, Fig. 6 to move yoke finger 85 leftwards to move two pawls 63, 64 to allow spring 61 to rotate ratchet wheel 60, the register number wheels and cams 56 to an initial starting position determined by cam 56<SP>1</SP>, Fig. 7, engaging an adjustable spring loaded stop 93. The depression of one of four buttons to dispense e.g. 1-4 dollars worth or 1-4 gallons of petrol acts via cable 91 to turn clockwise about 88 one of four cranks 92 which snaps past a rotatable stop 106 holding the crank in its operated position at 105, the crank raising a hinged finger 95 into the path of its respective cam 56 and into engagement with a stop 96 between the arms of a U crank 99. Shaft 43 is turned anticlockwise to start the pump which through meter 13 and variator 19 containing gear train 70-74 drives the register cost and gallonage wheels and also rotates a cam 67, Fig. 6 which lifts spring loaded lever 65 carrying pawl 64 to rotate ratchet wheel 60 by one notch for every complete rotation of cam 67. The dispensing of the pre-selected amount of liquid through the meter will rotate wheel 60 and bring one of the cams 56 into contact with the pre-selected finger 95 whereby crank 99 is rotated clockwise to turn lever 101 on the shaft 39 to release pawl 35 whereby valve 15 is partially closed for a reduced flow rate when member 34 rotates clockwise and its lever 130 engages hinged stop 131 carrying a follower 140 spring- loaded at 143 away from engaging cam 142. When the predetermined amount has been dispensed the spring loading valve 15 to close acts via member 34 and stop 131 to move the follower into a cam dwell and completely close the valve. As one crank 92 rotates stop 106, the stop releases any other cranks and buttons which may have been inadvertently depressed. Rotation of shaft 43 to reset the apparatus also turns stop 106 to release all the buttons. The valve may be cocked open by pulling a handle and linkage 47, 48 to rotate member 34 in which case a lever 122 rotates stop 106 to release all the buttons. Specification 776,014 also is referred to.