Patent GB-529252-A (GB)
Title: Improvements relating to liquid measuring and dispensing apparatus
IPC: B67D7/30
Filed: 1939-05-15
Abstract: 529,252. Dispensing liquids. AVERYHARDOLL, Ltd., and FRASER, J. May 15, 1939, No. 14398. [Class 116] Consists of a modified form of the liquiddispensing apparatus described in Specification 478,129, and comprises the location in the delivery line of a valve mechanism incorporating a valve influenced by the delivery flow and which during delivery tends to close, and the association with the flow-influenced valve of a control device incorporating a setting member governed by the indicating mechanism which upon the initiation of a delivery automatically sets a means for preventing the valve mechanism as a whole moving to a closing position, a release mechanism being provided which is brought into action for assuring automatic control of cessation of delivery by introducing a temporary check to the rate of delivery. Depending axially from the upper end of a housing 4 situated between the meter 3 and the outlet pipe 31 is an annular guide 5 formed with an internal transverse partition 5a above which are apertures 5d through which liquid passes from the housing to the nozzle. The partition forms a guide for an axially slidable valve rod 6 on which are mounted a collar 17, a flow valve 7 which is normally held on to an abutment 8 by a spring 9 and collars 10, 11 between which is held an inverted cup 12 rigidly secured to a cut off sleeve valve 13 slidably mounted on the guide 5. An opening 12b in the member 12 and a jet 16 at the top of the valve rod 6 allows a seepage of liquid past the closed valve for the purpose described in Specification 524,570. A spindle 19 rotatably mounted in an inlet section 4a of the housing carries an internal arm 18 resting on the collar 17 and an external arm 20 pivotally connected to one end of a check link 21 the other end of which is pivotally connected to a release detent 22 of inverted L-shape pivoted at one end to a fixed part of the indicator mechanism and at the other end carrying a pawl 22c adapted to cooperate with a cam 24 on a shaft 25 driven by the indicator. A depending finger 21a on the link 21 co-operates with a freely pivoted arm 26 which may be held in the raised position shown by a pin 28 when a pawl on an arm 29 engages the gapped portion of another cam 30 also mounted on the shaft 25. In operation, when the operator opens the nozzle control valve after the starting of the motor, the flow of liquid lifts the valve 7 against the action of the swing and delivery begins, upward movement of the valve rod 9 being prevented by the finger 21a bearing against the end of the arm 26. The arm 22 is held away from the cam 24 by a spring 22b and the rotation of the shaft 25 lifts the arm 29 and lowers the pin 28. When the operator gives a momentary check to the delivery, the valve 7 moves downwardly on to its abutments 8 and the relief of pressure on the end of arm 18 allows the spring 22b to move the finger 21a away from the arm 26 which falls away from its obstructing position. If the full flow is now resumed, the valve rod 9 rises slightly together with the cut-off valve 13 until the pawl 22c bears on the surface of the cam 24 and when the pawl falls into the cut-away portion of the cam, the valve 13 moves quickly to the cut-off position and delivery is stopped.