Patent GB-231163-A (GB)
Abstract: 231,163. Krupp Akt.-Ges., F. March 18, 1924, (Convention date]. Adding and subtracting apparatus with several totalizers.-The totalizers arranged in lines on shafts 31 and selectively actuated by differential racks 13 are duplicated on lower shafts 63, these duplicate or auxiliary totalizers being actuated by racks 59 geared through shafts 56 with a second series of actuating racks 14 the differential movements of which are complementary to those of racks 13. Totals are taken off from the main counters for printing by the ordinary movements of the racks, the racks 13 being limited in travel in the usual way by contact of the transfer teeth with their co-operating trip devices and the racks 14 continuing their motion to complete the complementary movements. Differential-mechanism. - Depression of an amount key lowers a corresponding blade 10 into the path of shoulders 11, 12 on the complementary racks 13, 14 formed with driving teeth engaged by toothed sectors 20, 21 connected by toggle links 24, 25 with a bar 28 lowered and raised at each operation of the machine. By means of teeth 35 and intermediate pinions 34 the differential movements of the racks 13 are conveyed to the totalizers on shafts 31 and a similar mechanism connects the auxiliary totalizers on shafts 63 with the racks 59 geared with racks 14. Totalizing-counters.-The machine is provided with twenty-eight totalizers, namely an adding and subtracting totalizer on shaft 91 and three groups of nine totalizers each on shafts 31. These latter totalizers consist of pinions 37 mounted by denominations on the elongated hubs of actuating wheels 32 in gear with the intermediate pinions 34. Shaft 31 running through the line of totalizers carries riders 40 projecting through slots in the hubs, and when the shaft is axially adjusted under the control of the transaction bank of keys the riders are in engagement with recesses 39 in the pinions of the corresponding totalizer, which may thus receive the movements of the actuating racks conveyed through the wheels 32. The shafts 31 and 63 are rigidly connected by a yoke 68 to effect selection of the corresponding auxiliary totalizer. The adding- and-subtracting totalizer consists of duplicate pinions reversely geared together by a train of gears 100, 101 and the shafts 91, 105 aTe axially displaced to effect addition or subtraction by selecting either pinion for actuation. Transfer-mechanism.-The intermediate gear wheels 34 conveying the actuations to the main totalizers are mounted on pivoted plates 33 toothed at 70 to rock similar plates 69 for the auxiliary totalizers and cam-slotted at 43 to receive rocking motion by means of rollers 44. These rollers are carried by toothed sectors 46 pivoted at 45 and each provided with a bar 47 co-operating with the transfer teeth of all the pinions of the same denomination. Each sector gears with a pinion 49 connected by a curved link 51 with a spring-controlled arm 54. Normally the parts are maintained in the position shown in Fig. 1, the line joining the pivot pins 50, 52 lying above the axis 48. At transfer, however, the transfer tooth 38 rocks the bar 47 and sector 46 counterclockwise to throw the line below the axis so that the spring 53 can complete the movement and, by means of roller 44, rock the plate 33 to cause through the rolling of pinion 34 the addition of one unit to the higher wheel. Printing totals.-To take off a total the selected totalizer is engaged with the actuating rack 13 on the outward stroke to return the numeral pinions to zero as determined by contact of the transfer tooth with the bar 47. The remainder of the stroke is absorbed by the complementary rack 14 which, through the rack 59, returns the auxiliary totalizer to zero after movement through the complement of the number originally standing on the main totalizer. The zero position of the auxiliary totalizer is determined by zero stops 72 which are moved into effective position to engage the long teeth 71 just after the rack 14 (or 59) begins to move. This delay is for the purpose of enabling the long tooth 71 to escape past the stop in the case where the pinion is already at 0 and has, of course, to make the full rotation back to 0 again.