Patent GB-289107-A (GB)
Title: Improvements in and relating to apparatus for delivering measured volumes of liquid
IPC: B67D7/16
Filed: 1926-10-22
Abstract: 289,107. Smith, H. W., Smith, R. V., and Smith, I. C. V. Oct. 22, 1926. Fixed-chamber apparatus; varying quantity measured in.-In apparatus for measuring and delivering variable quantities of liquid, particularly apparatus of the kind described in Specification 234,857, in which an elevated measuring- chamber is filled by liquid raised by suction, the operation of charging the chamber automatically prevents the improper movement of the supply and discharge valves; and also prevents the resetting of the quantity-determining gear until the measured volume has been delivered. Fig. 2 shows an apparatus comprising a measuring- chamber a containing a float i depending from which is a rod i with strikers l, which are arranged in different horizontal and vertical planes, and separately engage with a trigger 12. Fig. 6, so as to deliver a predetermined quantity. This quantity is determined by setting. over a dial, a pointer on the end of the dial spindle 7; the nut 11 on the screwed end of the spindle adjusts, by means of the pin 11<b>, the lever or trigger 12. This having been set, the suction pump g, Fig. 2, is operated by the crankhandle o, and chain gearing, the cock c is set. to the filling position by mechanism described in Specification 289,106, which also moves the spindle 1, Fig. 4, and the lever 2 on it anticlockwise until the end of the lever 2 trips past the end of the spring lever 3, thus looking the spindle 1 in the charging position of the cock. During this movement the pin 38 moves over the are 33<a> on a lever 33 pivoted at 33<b>, which is then moved by a spring 35 into a position with which a steel abutment 33<c> bears against a similar abutment 34<a> on an arm 34. Pumping continues, and the float i rises until the appropriate striker l engages with the trigger 12. At the beginning of the rise the striker t<2>, Fig. 4, releases a lever 19, which is lifted by a spring 19<b>; at its other end a pin 20 falls into one of the slots 21<a> on a disc 21 on the dial spindle 7, which is thus locked, preventing any alteration of the selector gear while the pump is being operated. The striker 34d is also lifted, and the lever 34 is released; the hard steel plate 34a on it engages with a similar plate 33c on the lever 33 as stated above. When the selected amount of spirit has entered the measuring- chamber the corresponding striker engages with the end of the trigger 12, and causes it to rock in a vertical plane on an axis 22 in a pivoted lever 29, and to release a L-shaped lever 23 from a pin 24 on the block 29. The lever 23 is pulled over by a spring 25, and a horizontal finger on it at the point 26<a> engages with a hook-like vertical projection on the finger at trigger 12, and lifts it. This movement of the trigger 12 causes the block 28 to depress the tripping-piece 3, which releases the pawl 2 on the axis 1. The pawl 2 now rotates clockwise through about 30‹ under the influence, of the spring operating the cock lever system, which moves the cock back into such a position as to cut off the supply of liquid to the measuring-chamber. Simultaneously the vacuum is broken. In this position of the pawl 2, a pin 2<a> on it engages with a tripping piece 31, pivoted at 31<a>, and connected to the lever 33 by a spring device 31b. During this movement of the cock spindle 1 and the lever 2 on it, the spring 25 acts as a rigid rod to force over the vertical part of the lever 23, lifting the horizontal arm of it until it engages again with the pin 24. On reversing the direction of pumping, the mechanism described in Specification 269,106, re-sets the cock c to enable it to discharge the contents of the measuring chamber. The float falls, the striker 34d moves down the locking-lever 34, separating the parts 34a, 33<c>, and releasing the lever 33, which is then drawn into the original position by the spring 35. The lever 33 also pulls over the locking piece 31, and the pawl 2 returns to its normal position. Simultaneously the locking gear 20 is lifted by the striker 2 to release the setting-gear. The float i moves on rods y, and the tail j has ball-bearing fittings z. In a modification the locking gear 20 is operated by a pin 41, Fig. 12, on the arm 27 on the lever 33. As the arm 27 moves to the right, the lever 19 is moved by the spring 42, depressing the locking pin 20. With counting-apparatus,-Strikers 36, Fig. 6, on the tail i of the float engage with a tumbler pawl 39 and operate a ratchet 37 and countershaft 40, which drives a counting-apparatus.