Patent GB-925715-A (GB)
Title: Improvements in or relating to indicating mechanism for apparatus for delivering quantities of fluids
IPC: G06M1/30
Filed: 1960-04-01
Abstract: 925,715. Counting-apparatus. SOC. D' ETUDES, D'INVENTIONS ET DE BREVETS. April 1, 1960 [April 2, 1959], No. 11616/60. Class 106 (1). [Also in Group XXIV] In an indicating device for liquid-dispensing apparatus having duplicate sets of volume and cost counters, a change-speed gear for driving the cost counters is located within the parallelepiped formed by the volume and cost counters. As described, during liquid delivery, a shaft 6 is driven which via bevel gears 9, 10 and further gearing (Fig. 6, not shown), drives the volume counter 1 and a duplicate volume counter 1<SP>1</SP> (not shown). Change-speed gear.-The meter shaft 6 drives a gear 14, Fig. 5, which is fixedly mounted on a shaft 20 and forms the input to the change-speed gearing shown in Fig. 5, which gearing is adapted to drive an output gear 19 in accordance with a preset unit price, the gear 19 driving the cost counter 2, Fig. 1, and a duplicate cost counter 2<SP>1</SP> (not shown). The change-speed gearing comprises a cone of gears 103-109 corresponding to the digits 3-9 freely mounted on the shaft 20. Gears 101, 102 have the same diameter as the gear 109 but rotate at speeds to correspond to the digits 1, 2, the gears 101, 102 being driven by a pinion 113 fixedly mounted on the shaft 20 through further auxiliary gearing 110-112, 114-116. Thus the overall diameter of the change-speed gearing is reduced, but the smallest pinion 103 is larger than if the cone had been for all the digits 1-9. To adjust the unit price there are provided four knobs 7, one for each denomination of the unit price, arranged to rotate the unit price drums 3 via bevel gears 38 on shafts 32 and to adjust pinions 22a-22d, Fig. 3, meshing with the change-speed gear and adapted to drive shafts 23a-23d carrying gears 27a-27d, the movements of which are added by gearing 122a- 122d, 123b-123d, 124a-124c, 125b-125d to drive the output gear 19. The pinions 22a- 22d are maintained in their various operative positions by the co-operation of noses 34 with notches in cylindrical notched guides (Fig. 8, not shown). Zeroizing.-The drums of the volume and cost counters have heart-cams 43, Fig. 7, adapted to co-operate with zeroizing levers 44 which carry also the transfer pinions 47 and are controlled by pawls 50 rockable about pins 51, the pawls 51 being adapted to release the levers 44 for zeroizing movement under the action of springs 46 tensioned during the previous delivery operation. Extensions of the pawls 50 act on the levers 44 during their final movement so that if a drum is not set to zero, subsequent movement of the pin 51 is impossible and the pump motor 4 is not switched on. A modified form of the zeroizing lever 44 is described (Figs. 10-12, not shown). Interlocking device, Fig. 9. The shafts 32a- 32d have a flat surface against which can bear four arms of a spider 127, a fifth arm 127e co-operating with a cam 128 mounted on one of the pins 51 and having a notch 128a into which the fifth arm can fall thereby releasing the shafts 32a-32d for rotation to alter the unit price only when the counters are fully zeroized. Operation.-When the dispensing nozzle (not shown) is unhooked from its hook 5, Fig. 1, a member 52 descends under spring action, thereby reciprocating the pins 51 to disengage pinions in the drives to the counters (Fig. 6, not shown), and then to release the levers 44 to zeroize the counters. Subsequent movement of the member 52 closes the switch 4 of the pump motor. When the operator opens the delivery nozzle, liquid flows and drives the metering shaft 6. Reference has been directed by the Comptroller to Specification 895,729.