Patent GB-146285-A (GB)
Title: Improvements in and relating to item printing arrangements for calculating machines
IPC: G06C11/00
Filed: 1920-06-24
Abstract: 146,285. Vidal, A. E., (Representative of Rauchwetter, F.). Dec. 5, 1916, [Convention date]'. Hammer-impression arrangements. -Relates to key-set handle-operated recording-machines, and consists of arrangements for controlling the printing of zeros and for splitting the machine to print distinct groups of figures in each line. The hammers 5@ after release of hooked catches 54 and displacement of the main restoring bail 74 are operated by springs 53. A spindle 55 rotated from the main shaft after a certain amount of rotation forces a bail 59 rearwards, thereby disengaging the catches by.means of links 60. During the operation, a roller 68 on a cam 67 releases, by means of a lever 66, a lever 65 in such a manner that projections 62 on bent levers 64 are free to enter recesses 61 in those type carriers which are in the zero position and to the left of the highest significant figure, thereby rocking the levers 64 to uncouple the links 60. The lateral connexions between denominations are made by means of right and left handed projections 69, 69<1>, Figs. 8 and 9, on the bent levers 64; these are spaced apart and the space is occupied by the ends of coupling- rods 70 suitably mounted to permit of a longitudinal sliding, and vertical rocking movement. To interrupt the lateral connexion at any desired point, coupling rods 70 engage a transverse rail 72 having notches which when brought to the particular denomination allow the coupling rods to be withdrawn from engagement with the lateral projections 69, 69<1>. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the following subject-matter, which does not appear in the Specification as accepted. Type-bar actions.-The keys 2, Fig. 2, through the bent levers shown, produce a differential movement of the slide rod 2<1>, and thereby of a stop 6 upon the end of a bar swinging from a trunnion 4. Upon operation of the handle, an arm 10 and stop descend, whereupon a spring 11 draws a lever arm 8' downwards so as to position, by intermediate mechanism, an actuating- segment 24 according to the particular part of a stepped rack 9 upon the lever arm that abuts against the stop-pin 6. This movement is also communicated to the type-bars 1. A slide rod 15 operated by a total-key 14 draws forwards a lever 17 so that, when the main handle is operated and the lever is raised, a rock shaft 29', carrying arms upon which the actuating segments swing, is rocked so as to lift the segments into gear with the totalizing counter 3, and simultaneously to bring stop arms 25 into the paths of lugs 27 upon the numeral wheels of the totalizing-counter. At the same time an arm 29 depending from the rock shaft 29' displaces the itemkey-set arms 5 and their pins 6 laterally in order that the stepped racks 9 may be free to take up positions determined by reverse movements of the numeral wheels to the zero positioned defined by the lugs and stop arms upon the fall of the arms 10, and thus to position the type-carriers according to the total. Depression of arms 10, with their stops and springs 11, is prevented, when the non-printing key 49 is depressed before operation of the main handle, by disablement of a hook 46 normally holding an arm 42 with a pivot 34 for one of the links in the train communicating movement of the type-carrier positioning arms 10, which thereupon receive no movement. Ink-ribbon mechanism.-Cams are provided for raising the two-colour ink-ribbon support 78, Fig. 4, to a height different when items printing is occurring, from its height when total printing is desired.