Patent GB-199046-A (GB)
Abstract: 199,046. National Cash Register Co., (Assignees of Shipley, B. M.). March 11, 1921, [Convention date] Type-wheel machines; aligning for impression; hammerimpression arrangements.-In cash registers provided with means for printing the item upon a record-strip, a voucher and an inserted slip, provision is made for aligning the differentially-moved racks controlling the type-wheels and also for aligning the typewheels themselves, and for preventing platen movement in the case of the date wheels when printing upon the recordstrip. Mechanism is also described for operating the platen for printing upon the inserted slip, and for preventing movement when no slip is present. The racks 669, 688, Fig. 20, differentially set as in Specification 8119/15, [Class 106 (i), Calculating &c.], by spiral gear connection with the differential mechanism controlled by the amount and special banks of keys and by the ledger number keys respectively, gear with the typewheels arranged in duplicate lines on studs 732, 733, Fig. 15. A spindle 707, Figs. 20, 23, carries a pair of arms 706, 708 engaging aligning bars 702, 703 slidable in fixed bosses 704 and adapted to be moved down and up respectively to engage teeth 700, 701 on the racks 669, 688. This aligning movement is derived from the main printing shaft 651 through cam and lever mechanism and a link 710, Fig. 23, connected to an arm 709 fast on the spindle 707. The racks 669 gear in alternation with pinions 728, Fig. 26, arranged in staggered fashion on fixed spindles 721, 722 and gearing through nested sleeves 720 and corresponding pinions 730 with the type-wheels 731. The ledger number racks 688 mesh with pinions 738 connected by sleeves 739 and pinions 742 with idle pinions 743 engaging the ledger number type-wheels 749. The intermediate pinions on the two spindles 721, 722 are aligned by bars 750 752 supported by arms which are mounted on the studs 732, 733 and are rocked synchronously with the rack-aligning bars by a pin and lot connection 765 with the link 710. The two bars 750. 752 are inter-connected by means of a plate 755 slidably supported on the studs 732, 733 and pin and slot connected to the arms supporting the bars, the plate being raised and lowered by an arm 762 fixed to the rock-shaft 763. The date. type-wheels 771, Fig. 26, are manually set by slidable nested sleeves 773 and are aligned by spring-pressed pawls which engage pinions 775 meshing with the type-wheels. Secured to one of the platen-supporting arms 883, Fig. 18, is an arm 963 connected by a link 964 with a lever 965 rocked by geneva and cam mechanism from the shaft 651. As the printing of the date upon the is not desired, the strip does not extend over the date type-wheels and the platen is divided so that the supplementary portion corresponding with the latter wheels does not function in the first impression movement of the main platen. The supplementary platen is mounted on a plunger 988, Fig. 12, slidablymounted in the block 888 and controlled by a lever 991 fast on a shaft 992 mounted in the platen-supporting arms 883. The shaft is connected by an arm with a slide 994 having a cam slot 995 engaged by a pin on the lever 991. A sliding link 1000, Fig. 18, is connected at one end to a lever 1002, pivoted at 877, and at the other end to an arm 997 secured to shaft 992. The lever 1002 is connected by a cam-slot and pin with the lever 880 referred to above so that when the latter is rocked prior to impression the link 1000 is moved to the left to rock the shaft 992 counterclockwise and through cam-slot 995 raise the supplementary platen out of action. After the record-strip has received the impression the lever 880 is rocked back and the platen is restored to functioning position again ready for impressing the date upon the voucher. The inserted slip in duplicate is placed upon the table 1250, Fig. 15, and printed twice from the lower type-wheels arranged on spindle 733. The platen 1255 is carried by arms 1251 one of which has a pin 1257 engaged under spring control by a lever 1256 fast on a shaft 966 to which is also fixed an arm 1259, Fig. 14, provided with a roller engaging a cam 1261 formed with two projecting portions 1266, 1267 and driven from the main printing shaft 651. The arm 1259 terminates in a nose 1269 which normally engages a cut-away part 1268 of the cam but takes over the duty of the roller at the critical points. Under the control of the cam the shaft 966 is rocked against the action of a strong spring 1273 and when the release point is reached the lever 1256 imparts an upward jerk to the platen through the pin 1257. When no slip is present in the machine the operation of 'the platen 1255 is prevented and for this purpose a feeling arm 1334, Fig. 9, is rocked upwards by a cam. 1330 and link 1328 through pin 1327. If no slip is present the movement of the arm is obstructed and the link can move to the right under the action of its spring 1331 so as to rock a lever 1332 counterclockwise thus bringing the arm 1336 of the lever below the portion 1337 of the platen support 1254 and so preventing the platen from descending to be subsequently thrown up for im pression. A pawl 1339 mounted on a plate 1338 fixed to a shaft 797 rocked during the operation of the machine, positively holds the lever 1332 against movement when a slip is present.