Patent GB-465347-A (GB)
Title: Improvements relating to price indicating and computing mechanism
IPC: B67D7/08
Filed: 1935-11-01
Abstract: 465,347. Counting-apparatus. AVERY-HARDOLL, Ltd., and FRASER, J. Nov. 1, 1935, No. 30159. [Class 106 (i)] In a price indicating and computing mechanism particularly for use with liquid-dispensing apparatus, variations in the price per unit are provided for by a change gear, a single setting means for effecting the gear change simultaneously effects a corresponding setting of the movable unit price indicator, and means are associated with the setting means for breaking the driving connection at the change gear in obtaining access thereto. Preferably a cone gear is used and a jockey pulley to engage therewith is carried by a cradle which must be rocked to disengage the jockey pulley from the cone gear before the cradle can be displaced axially to change the gear ratio and set the unit price indicator. Trip and total counters are provided to indicate the gallons dispensed and the price thereof. The invention is described as applied to liquid-dispensing apparatus of the known electrically operated flow meter type. When liquid is to be dispensed the hose cock is removed from its support on a lever 59, Fig. 1, which is rocked by the usual spring to rock a lever 58, Fig. 6, upwardly. A link 58<a> is actuated by lever 58 to close the circuit of the motor operating the measuring apparatus and a lever 57 is raised until a projection 57b thereon engages a notch in a disc 53 rigid with a shaft 39 to prevent operation of the zeroizing handle 49, Fig. 1, during a dispensing operation. When the hose cock control valve is operated, the flow meter spindle rotates a shaft 8, Figs. 2, 4, which through gearing 10, 11, 12, 13 rotates the main driving shaft 14. The shaft 14 drives through a friction-clutch 19<a>, a bevel gear 19 meshing with bevels 20a, 20b, mounted on shafts 21, 22 respectively, these shafts driving respectively through friction clutches in known manner the front and rear trip-pointers 23, 24, indicating gallons and fractional gallons. The shaft 14 also drives through gearing 15, 16, and shaft 17, the total gallons counter 70, Figs. 4, 5, and the cone gear 18, the operative pinion of which drives a jockey pinion 26 carried in a cradle 27. The pulley 26 drives a gear wheel 29 floating in the cradle and splined to the drum driving shaft 31. Shaft 31 drives the total price indicator 69 through gearing and through a friction clutch 33, drives a pinion 32 meshing with a gear-ring 34 which drives the rear set of price indicating drums 35, through a shockabsorbing connection comprising a pin 36 on the ring 34 engaging a hole 36<a> in a disc 36<b> fixed on the hub of the units drum 35, and a spring 37 anchored to the pin and the disc 36b. The wheel 32 also drives the front price indicating drums 40 in a similar manner through an idler wheel 38 free on shaft 39. The pricecomputing drums are normally obscured by shutters 77 which are rocked away from the viewing windows by projections 71 on the pointer shafts 21, 22, coacting with projections 75 on rods 76 pivoted to the shutters soon after the units drums move from zero, and are returned to the obscuring position during zeroizing. When a delivery is completed the hose cock control valve is closed and the hose cock is replaced on its support on lever 59. The consequent rocking of lever 59 and therefore lever 58 opens the motor circuit through link 58a and withdraws the projection 57b from the notch in disc 53 to unlock the zeroizing shaft 39. Zeroizing. This is effected prior to a subsequent dispensing operation by rotating the handle 49, Fig. 1, anticlockwise which rotates shaft 39. A pawl 52 pivoted to the disc 53 rigid with shaft 39, and normally held out of engagement now rotates the idler wheel 38 in the reverse direction through a ratchet wheel 51, the idler wheel 38 zeroizing the price indicating drums 35, 40 by reverse frictional rotation through the gears 34<a> and 32, 34. The pointers are zeroized through a pinion 41 free on a shaft 42 and meshing with the idler wheel 38, a spring pawl 41b on the pinion rotating through a ratchet 41<a> the shaft 42, a bevel pinion 43 on which, Fig. 4, meshes with the bevel pinions 20<a>, 20b, Fig. 2, which now drive the pointers in the reverse direction, to zero position determined by stop pawls 25 when the friction clutches in the pointer drives slip. During this resetting the clutch 19<a> also slips. Rotation of the zeroizing handle 49 also rotates a face cam ring 44, whereby a lever 45, Figs. 1, 5, is rocked to depress a push rod 40b co-axial with the price drums 40. The other end of the push rod, rocks a lever 46 which depresses a push rod 35b coaxial with the price drum 35, and at 46<a> presses on a cover 33<a> to disengage clutch 33 for the pinion 32 from the driving shaft 31. The axial movements of the push rods 40b, 35b declutch the price drums 35, 40 from their normal drives so that the drums are frictionally rotated to zero by the sleeves on which they are mounted. The movement of the zeroizing shaft 39 is limited to one revolution by a bell-crank 56 pivoted to the disc 53 and biassed by a spring 54. Thus, when zeroizing is completed and the cam ring 44 permits the lever 45 and push rods 40b, 35<b>, to assume their normal position, the lever 56 abuts against a stop 56<a> on the disc 53 and a pin 57<a> on the lever 57 to stop the disc 53 as the pawl 52 is rocked out of engagement by an abutment. During dispensing operation as the projection 57b enters the notch in the disc, a groove in the lever 56 permits it to slide over the pin 57<a> and engage a second stop 56<a> to permit zeroizing. Zeroizing may alternatively be effected by power actuated means. Change gear setting. The cradle 27, Figs. 2, 4 is formed at its upper as a nut threaded on a screwed shaft 28, the squared operating end, 28<a>, Fig. 5, of which is normally covered by a lever 60. To change the gear ratio, the screening lever 60 is rocked clockwise, Fig. 5, clear of the shaft end 28<a>, and rocks a shaft 60<a> rigid therewith. An inclined plate member 66, rigid with shaft 60<a>, thereby rocks the cradle through an arm 27<a> thereon to move the teeth of the jockey pinion 26 out of mesh with the cone gear. A key is then applied to the end of shaft 28 which is turned to move the cradle 27 laterally. At the same time a pinion 61 on shaft 28, drives through pinions 62 and shaft 63 a shaft 65<a> rollers 65b on which drive the basic price indicating bands 65 which also pass over guide pulleys 65<c>. When the appropriate price is indicated through the front and back windows of the apparatus the key is removed from the shaft 28 and the screening lever 60 rocked to the position shown by a spring 60c when the cradle is rocked thereby and the jockey pinion meshes with. the appropriate pinion 18 of the cone gear. Specification 426,267, [Group XVIII], is referred to in the Provisional Specification.