Patent GB-190713731-A (GB)
Title: Improvements in and/or connected with Adding Machines.
Inventor: REPPERT RICHARD VON
Filed: 1907-06-13
Granted: 1908-07-13
Abstract: 13,731. Reppert, R. von. June 13. Typewriters and like machines.-In a recording adding machine of the single-bank key-set leveroperated type, the itemwheels are normally all to the right of the totalizer-wheels, but are spaced 'laterally at each successive key operation so as to bring each wheel in turn opposite the key-con trolled setting-stops; in this way, at the end of the setting, set-item wheels are opposite a similar number of totalizer-wheels from the units upwards, which allows an item to be set by the operator as on a typewriter, from left to right with regard to denominational order. In the setting position, each item-wheel is released and allowed to turn under the action of its spring until arrested by the key-set stops; the operating-lever carries all the set item-wheels into engagement with totalizer-wheels and then resets them, the differential movement of the totalizer-wheels being utilized to position the item type-bars. In printing a total, the totalizer-wheels are zeroized into the type-bars, and for correcting an error the item-wheels are zeroized while out of engagement with the totalizerwheels. The improvements relate to : (1) the setting and spacing mechanism; (2) the means for operating the machine and actuating the totalizing- counter ; (3) the return of the item carriage to the right ; (4) item-printing: (5) transfer mechanism and totalizer detents ; (6) the means for indicating, printing, and zeroizing the total ; (7) the paper and inking-ribbon feeds; (8) error key. (1) The item-wheels 17 are mounted between plates 15 constituting a carriage movable laterally to the left upon a cross-rod 13 by a rack and pinion 23, 24 actuated by a spring 28 ; this spacing movement takes place under the control of a universal bar 35 and associated pawl and ratchet parts. Each itemwheel has a numeral-bearing segment 18 and occupies the zero position when it arrives opposite the fixed spring stop - frame 45, Fig. 3; upon depression of a key, the corresponding stop pin is forced in and the detent 21 of the wheel is released by a universal bar 38, whereupon a spring 20 rotates the wheel until a projection 44 is arrested by the pin, where it is held by re-engagement of the detent. When an item has been set, as many item-wheels, counting from the left, as there are digits in the item have come opposite the same number of receiving-wheels 142 of the totalizing- coanter, counting from the right. (2) Movement is communicated to the principal shafts 61, 81 of the machine by the operating key-lever 54, the shaft 61 being oscillated by the recess and spring switch at the rear of the lever; through the medium of a vertical rod 65, Fig. 2, and a bell-crank 69 the cross-rod 71 is thus moved rearwards and rotates the item-wheel carriage about its rod 13 until the itemwheels gear with the receiving-wheels of the totalizer. The rack 79 upon the operating-lever now begins to rotate a sector whereby a similar cross-rod 76 is moved upwards so as to strike the arms 73 of all displaced item-wheels and reset them to zero, thereby actuating the totalizer. (3) Upon release the operating-key is returned by a spring, mounted at one end of the shaft 81, which has been previously wound by the rear segment 80 and pinion 82 during depression of the key ; the return of the shaft also rotates a transfer-cam sleeve 88 thereon through ratchet-gearing and from this the spacing- spring 28 is rewound by the bevel mechanism shown in Fig. 8. The carriage is simultaneously re-spaced to the right and a pawl connexion between the bevel wheel 95 and the disk 96 is broken upon completion of t e winding. (4) For the purpose of printing the items, the diffential movement of the receiving-wheels 142 of the totalizing-counter is utilized to position the item type-bars 104, which are put into engagement with transmitting- wheels 103 by depression of their forward supporting yoke 109 upon the downward movement of the rod 65. The type-hammers 122 are forced upwards by a spring-impelled movement of the yoke-bar 125 in the slot 127, the spring having been previously wound by the segment 134 and then released by a projection as the key reaches its lowest position. Springs 117 restore the type at the printing-point, and others 113 move the typebars forward as soon as they are lifted.' (5) The transfer pawls are tripped and subsequently operated, and are associated with totalizer detents which are always thrown out of action durirg the actuating and transferring movements. At transfer a pin (not shown) lifts a trip-lever 165, which is freed from its locking-pawl 171 during actuation, thereby throwing forwards the arm 158 carrying the transfer pawl 159; meanwhile, the detents 147 are kept out of engagement by the rearward plate upon the item carriage, but upon the forward movement of this carriage such detents as are not retained by the projections 173 of the transfer pawl arms re-engage. At the close of actuation the trip-levers are again locked and the pawlbearing arms are successively lifted by staggered cams on the sleeve 88 ; other cams upon this sleeve control bylink-work the yokes which restore the trip-levers and position their locking pawls. (6) The total is displayed by numeral wheels 187 engaged with the receiving-wheels, but to print a total the transmitting-wheels are zeroized while in train with the type-bars by means of a totalprinting lever 224, aud the type-hammers subsequently operated. The rotation of the shaft 190 thus affected results in the following movements: (a) by interaction of the pin 215 and switch cam parts 211, 212, the levers 214<a>, 217 are rocked to disengage the totalizer-detents and to lower the forward ends of the type-bars which then gear with (b) the pinions 194, and thus with the transmitting- wheels 103 ; these pinions are previously lifted by the disk 198 and pawl 199, and the pawl is thrown out of gear and locked in its upper position ; (c) the comb 193 is swept downwards, and, by engaging with the pins 191, zeroizes the wheels; (d) finally, the yoke 223 is lifted to operate the type-hammers. (7) The paper passes from the storage roll 244 over guide-rolls aud under a cylindrical platen 234 which is mounted on a rearwardly-hinged frame and is provided with a catch 230 in front, paper guides 247, and a friction roller 248. The ratchet-feed for the platen and that for the transverse ink-ribbon are derived from links 241, 260, which at each operation of the type-hammer shaft 136 are lifted by cam action. (8) To correct an error, the lever 265 is operated to disengage the vertical rod 65 in order that, when the operating-lever is subsequently depressed, the item segments may be reset and spaced to the right without affecting the totalizing- counter.