Patent GB-474489-A (GB)
Title: Improvements in counting mechanism for use in liquid delivery apparatus
IPC: B67D7/08
Filed: 1936-09-04
Abstract: 474,489. Liquid-dispensing apparatus. SAUSER AKT.-GES. Sept. 4, 1936, No. 24257. Convention date, Sept. 13, 1935. [Class 116] [Also in Group XIX] In liquid-dispensing apparatus a volumetric meter which supplies each unit of liquid by a number of revolutions of a piston operated crank-shaft is combined with mechanism adapted to complete the delivery of a started unit, trip and totalizing counters to indicate the volume dispensed and manually operated and driven zeroizing mechanism for the trip counter. When the trip counter is zeroized the inlet valve 14, Fig. 1, is opened to admit the liquid to the measuring device 1. The admitted liquid being under pressure, when the delivery cock 99, Fig. 11, is opened the shaft 6 is turned by the pistons 2, 3, and the liquid is delivered in known manner through a hose 98, cock 99, non-return valve 100 and spout 101. The shaft 6 through a coupling 8, 9 drives shaft 29, driving a shaft 32 through gearing 30, 31. The shaft 32 drives a known totals counter 40 through gearing 38, 39 ; it drives the hand 37 one revolution per unit through gearing 33, 34, 35, and through gearing 41, 42, shaft 43 and mutilated pinion 44 drives the units drum 45 of the trip counter, the tens and hundreds drums 48, 49 of which are driven through known transfer mechanism. As the drum 45 or 48, 49 move from zero, the shaft 51 on which they are freely mounted is moved axially to the right, Fig. 6, by pins 67 on the shaft and a coacting cam groove 66 in the corresponding drum. An arm 69 mounted on a shaft 68 is biassed by a spring 70, Figs. 3, 6, to maintain the arm in engagement with the end of shaft 51, so that the axial movement of shaft 51 permits shaft 68 partially to rotate and move an arm 71, Fig. 9, out of engagement with a lever 93 pivoted at 82. A spring 84 now presses the lever 83 on to the lever 93 mounted on shaft 91 as shown. Just before the delivery of liquid is to be stopped, that is, during the delivery of the last unit as indicated by the trip counter and hand 37, the cock 99 is closed for a short period, the registering also being stopped thereby. Owing to the continued feeding of liquid to the measuring device 1, a rise of pressure is produced in the whole system, and this pressure acting through the liquid in a conduit 97, Fig. 11, expands a corrugated tube 90, Fig. 8, to depress an arm 88 on shaft 82. A roller 89 on arm 88 through arm 94 rocks the shaft 91 to release the arm 93, Fig. 9, from the lever 83 which is then rocked by spring 84 until a roller 85 thereon engages a cam 80. When the cock 99, Fig. 11, is again opened, the cam 80, geared at 78, 79 to shaft 32 and driven in synchronism with the hand 37, again rotates. The zero position of the hand 37 coincides with the lowest point of the cam 80, and, as this position is approached by roller 85, the shaft 82 is gradually turned and with it a shaft 12 in the measuring device. Shaft 12, Fig. 2, carries a pawl 11 and an arm 13 controlling the liquid supply inlet valve 14 (shown closed). The pawl 11 can now drop on a cam stop disc 7 on shaft 6 of the measuring device, and, as the disc 7 rotates towards the stopping position shown, the arm 13 drops and gradually closes the inlet valve 14 until the pawl 11 drops in the recess 10 in the cam disc and prevents further turning of shaft 6 and simultaneously closes valve 14. At the same time the deepest portion of cam 80 reaches roller 85, the hand 37 reaches zero, and the non-return valve 100 closes automatically. Zeroizing of trip-counter. This must be done before further liquid may be delivered, and is effected by rocking, first anticlockwise and then clockwise a handle 62, Fig. 6, which through a toothed segment 61, Fig. 5, rotates the shaft 51 through pinion 60, first clockwise and then anticlockwise, the rotation of shaft 51 in both directions being limited to one revolution by a pin 59 on the shaft coacting with a pin 58 on a disc 57 free on the shaft and having a notch 56 coacting with a fixed pin 55. During clockwise rotation the groove 52 in shaft 51 slides past pawls 53 pivoted to the individual drums 45, 48, 49, and during anticlockwise rotation the groove' picks up these pawls and advances the drums to zero at the terminal position of the shaft. As the groove 52 engages all the pawls 53, the pins 67 on shaft 51 align with the respective notches 66 in the drums thereby permitting the shaft 51 to slide axially back to its initial position under the action of a spring 64, and push back the lever 69 thereby turning shaft 68 which through its arm 71, Fig. 9, rocks shaft 82 and shaft 12 coupled thereto. The pawl 11, Fig. 2, is thereby lifted to release the cam disc 7 and arm 13 opens the valve 14 ready for a further delivery of liquid. Also, as the lever 83 is rocked by the arm 71 the spring-controlled arm 93 again comes under the lever 83 as shown, since the corrugated tube 90, Fig. 8, has now contracted and released lever arm 88. An external handle 73 may also be provided for actuating the shaft 68. Specification 474,490, [Group XIX], is referred to.