Patent GB-285278-A (GB)
Title: Improvements in and relating to apparatus for measuring and dispensing petrol and other liquids
IPC: B67D7/16
Filed: 1927-04-21
Abstract: 285,278. Pietzsch, L. H. April 21, 1927. Fixed-chamber apparatus; valve systems for; varying quantity measured.-An apparatus for measuring and dispensing petrol and other liquids, of the kind with an adjustable, overflow pipe for varying the quantity measured, is designed to deal with a number of different, liquids, the measuring-chamber being fitted with floatmechanism which prevents the valve-mechanism from being manipulated except when the measuring-chamber is empty. Fig. 1 shows an apparatus comprising a glass &c. measuring chamber 2a and casings 4a, 5a enclosing four pumps 6 and the control gear. The pumps are operated by handles 6<a>, or by power, and each draws a different kind or brand of liquid from supply tanks by pipes 7 and inlets 7<a> to the measuring-chamber 2<a>. Each supply-pipe 7 has a spring-closed valve 11, Fig. 3, only one of these can be opened at any time, the opening being effected by a handle 23, spindle 22, and levers 21; the levers 21 have at their end rollers 27 which engage, in accordance with the setting of the indicator 24, one of the spindle-ends 19, and open the corresponding valve 11. The spindle 22 also operates a cylindrical control valve 32, Fig. 4, in a casing 31, and sets the ports 34, 34<a> so that., when liquid is being supplied by one of the valves 11, excess liquid drains from the measuring-chamber through pipes 36, 37 back to the corresponding supply-tank. Small pipes 131 inside the pipes 7 carry back to the drain pipes 37 any excess liquid which may tend to flow out of the pipes 7 owing to a rise in temperature. The discharge or service valve 78 leads to a swivel branch 86 connected to the valve outlet by a stuffing-box. A vertically-adjustable, overflow tube 38, Fig. 1, passes through a stuffing-box 38<a>, and telescopes into the pipe 36. Moving with the tube 38, to which it is secured by a bracket 40, is a vertical stop bar 43, the lower end of which moves in a guide, 59 and has a notch 44, Fig. 12. When the spindle 22 and the valves controlled by it are improperly set, as shown, the pawl 46 enters the notch; when the spindle is correctly set, a spring forces the hook-end of the arm 48 into one of the notches on the rim of the wheel or disc 41, and removes the pawl 46 from the notch 44, releasing the bar 43. A gravity catch may be pivoted opposite the end of the pawl 46. The float-device which prevents improper manipulation of the valves until the measuring-chamber is empty comprises a float 52, Fig. 9, moving on a frame 106 and on a guiding-line or rod 53, which has at its lower end a stop 54 and is attached at its upper end to a balance lever 56. When the measuring-chamber empties and the float 52 engages the stop 54, the lever 56, by means of a rod 57, lifts a plunger 58, Fig. 1, which, like the stop bar 43, moves in the guide 59, and raises it out of the path of the pawl 46, Fig. 12, freeing the wheel 41 and the valve spindle 22. Simultaneously a striker 104, Fig. 12, on the rod 57 moves an indicating-lever 103 so as to display suitable, words through the aperture 102. The float 52 turns bodily with the frame 106 on trunnions 107, 108, coaxial with the rod 53. The overflow tube 38, Fig. 1, is adjusted by a rack and pinion 64, 66 and a handwheel &c. 63 on a sliding and rotatable spindle 62. Moving with the tube 38 is a bar 91 carrying notched plates 92 corresponding to the various quantity-indications in the measuring-chamber. These notched plates are engaged by a spring catch when the tube 38 is properly positioned to give a desired volume of liquid, and a sleeve on the spindle 62 is free to move past the catch as the spindle is pushed in. In this position of the spindle a cone 68 on the spindly 62 engages with the lower end of an adjustable rod 73 and lifts the discharge valve 78; simultaneously the pinion 64 is disengaged from the rack 66, and the tube 38 cannot be moved. Attached to the bar 40 is an indicating-bar with numbers indicating the quantity of liquid to be sold, and other words, which show through an aperture in the casing. With counting apparatus.-When the discharge valve 78, Fig. 1, is opened by the cone 68 on the sliding spindle 62, the cone bears also on a spring lever which oscillates the frame 106, Fig. 9, carrying the float 52, so that fins 122 on the float are swung into the line of pins 123 on a vertical spindle 124. This, as the float rises and falls operates a counter 127.