Patent GB-190712682-A (GB)
Title: Improvements relating to Adding or Totalling Machines
Inventor: SAMUEL EMANUEL
Filed: 1907-06-01
Granted: 1908-06-01
Abstract: 12,682. Samuel, E. June 1. Typewriters and like machines.-In an adding- machine provided with printing means and operated by a series of independent setting disks or wheels c, Fig. 1, improvements are described in connexion with (1) the printing - lever and connexions, (2) resetting the printing-disks, (3) repeating items, (4) the printing of ciphers, and (5) other details. (1) The setting - wheels c actuate through toothed wheels d, j, and pin-wheels h<1>, the dials h of the registering- apparatus, the total indicated being visible through slots provided in the casing. The wheels d also operate a series of toothed wheels o, Fig. 4, mounted on nested sleeves which bear 'at their other ends the printing - disks p, p<1> and thus enable the separate items to be printed. In order to print a total, the setting-wheels must be independently moved to an extent corresponding to the total shown by the indicator. The paper-roll is shown at y. When the setting- wheels c are rotated by hand, the fingers come into contact at the end of the movement with keys f, Fig. 4, which throw stops e into the path of crossbars c<1> on the setting- wheels and so prevent the fingers from being pinched between the cross-bars and the frame. (2) The printing-lever u, Fig. 3, on being depressed, causes the inking-roller 7 to drop into contact with the stationary feed-roller 9 owing to the lever 12 actuated by the connexion 11 deflecting the spring support 10 for the frame 8 of the iuking-roller. The lever u then carries with it the lever 3, and thus brings the paper-roll y into contact with the printing- disks, whereupon the pawl 5, which is pivoted upon one arm of the lever 3 and serves to connect it with the lever u, is tripped by the inclined projection 6 upon the frame of the machine and allows the paper-roll to be restored to its normal position by a spring. The paper-roll is fed after each printing operation by a pawl arranged to slide along a stationary bar attached to the frame of the machine and to engage with a ratchet-wheel on the end of the roll. (3) The further downward movement of the printing-lever then rocks the lever v, and, by means of the disk q<1>, Fig. 1, slides the printing-disks and their operating-wheels o out of engagement with the wheels d. Springs r then reset the printing-disks to normal position as determined by the stops s, t. A special stop-arm (not shown) operating in conjunction with a spring catch, .is provided on the opposite end of the shaft carrying the special printing-disk p<1>. To repeat an item, a stop 16, Fig. 3, is moved beneath the printing-lever so as to arrest its motion before it reaches the position in which the lever v is operated. (4) The type is preferably formed on rubber bands secured to the peripheries of the printing disks and normally the cipher - types are slightly retracted from the printing level. When any one of the printing-disks p, Fig. 6, is rotated out of normal position, its cam p<2> moves the spring-controlled projection p<3> of the next lower disk and the stem p<4>. attached thereto radially outwards, thus bringing the required cipher-types successively into the printing line. The disk of highest denomination is shown on the right in Fig. 6. (5) When the printing-apparatus is not required, the gear-wheels of the printing-disks are held out of engagement with the setting-wheels by a suitable catch. To print reference or other matter, the printing-disk p<1> may be provided with a detachable type-rim to permit of any required types being readily mounted thereon, or the rim may be adapted to rotate relatively to the disk so that two or more series of references may be provided, the required series being brought into position by adjusting the rim. The machine may be locked by the engagement of a series of pivoted hooks 17, Fig. 3, with the setting- disks, an indicator 20 being provided to show whether the machine is locked or free.