Patent GB-162734-A (GB)
Abstract: 162,734. White, A. E., (Burroughs Adding Machine Co.). Jan. 5, 1920. Adding-apparatus; totalizing - counters; zeroizing- mechanism. - A key-set- and-operated machine is provided with two totalizers, one being always in gear with the actuating- segments to accumulate items in the usual way, while the other may be brought into use by the depression of a special key to accumulate items simultaneously with the first and preserve a total while the first is zeroized. The two totalizers may also be zeroized simultaneously. In one arrangement, the additional totalizer is arranged at the rear of the machine, as shown in Fig. 1, and an additional set of actuating segments is provided, these being coupled to the actuating-levers by the depression of the special key. In this form zeroizing is effected, as in the machine described in Specification 117,912, by a forward rotation of the numeral wheels collectively, the units wheel being advanced to the " 0 " position and the remainder to the " 9 " position, with subsequent transfer action. A special key is provided for coupling the rear zeroizing-mechanism to the usual zeroizing- handle. In another arrangement the additional totalizer is arranged in front of and adjacent to the main totalizer, as shown in Fig. 1<a>, and is adapted to be clutched into gear with it by the depression of a special key. The zeroizing- arrangements in this form are similar to those described in Specification 131,109, the numeral wheels being allowed to rotate backwards to zero under the action of their transfer springs. Means are provided whereby the wheels of the additional totalizer are locked automatically to prevent accidental movement when thrown out of gear, the lock being released upon the depression of another special key for a combined zeroizing operation. The clutches are also opened automatically prior to a zeroizing operation on the main totalizer. In the first arrangement, the additional actuating segments Ex, Fig. 1, are mounted on the shaft z of the bell-crank levers B, and are held rearwards in the uncoupled position by springs 30. They are provided with coupling hooks 32 adapted to engage studs b<1> on the levers B under the action of springs 33. Upon the depression of the special key 38 for double accumulation, a set of fingers 35 are moved to release the springs and allow the hooks to couple the segments with the levers. The interlocking means described in Specification 116,243 for preventing key depression during zeroizing is adapted to serve also for preventing simultaneous depression of an amount key and the special totalizer key 38. For this purpose the notched shaft 24 engaging the locking-plates 25 is provided with an arm carrying a pin 24<c>, Fig. 1, which is engaged by the projecting portion of a cam 36<a> on a lever 36 connected to the special key 38 as the latter rises or falls. The link 22, Fig. 7, connecting the lever 19 with the arm 23 on the shaft 24, is slotted at 22a to permit rocking of the shaft 24 independently of the link 22 when the key 38 is depressed. The zeroizing mechanism includes a, link 52, Fig. 7, having a notch 52a adapted to be engaged over a pin y on the usual arm Y<1> when a special key 53 is depressed for simultaneous zeroizing of the two totalizers. When the main totalizer only' is to be zeroized this link is held by a spring 57, Fig. 1, on the key lever 54. The link is slotted at its rear end and engages a lever 51 connected to an arm 50 of a rock-shaft Xx corresponding to the forward rock-shaft X. The link also has a spring 58 connecting a stud 52d thereon with the end of the lever 51, and is thus similar in action to the forward link X<2>. A curved part 52<c> of the link rides under a frame stud 19<a> when the link is lowered, to hold the link in engagement with the stud y without the necessity of maintaining finger pressure on the special zeroizing-key 53. The disablement of overthrow-preventing mechanism, comprising pinions B<2>, mutilated wheels B<1> and notched discs A<1>, Fig. 4, as described in Specification 100,293, is accomplished, in the case of the forward totalizer, by the lateral movement of a shaft 60 by a cam hook 61 on the link X<2>. In the case of the rear totalizer a similar shaft 60<x> is moved by a cam on a link 62. In the second form of machine described, a series of pairs of gear wheels 27, 28, Figs. 1<a> and 10, mesh with the gear wheels A<1> of the rear main totalizer and similar, but smaller, gear wheels 25 of the forward additional totalizer respectively, and a gang of clutch sleeves 30, Fig. 10, are movable laterally upon the depression of a special coupling key 33, Figs. 1<a> and 6<a>, to drive the wheels 28 from the wheels 27. Each clutch sleeve carries a pin 29 adapted to enter one of a series of holes 27a in the wheel 27, and a pin 40 adapted when the clutch is open to enter one of a corresponding series of holes 41<a> in a locking-plate 41, to prevent accidental movement of the additional totalizer wheels. The clutch sleeves are embraced by the arms of yokes 31 mounted on a shaft 32, movable laterally by a lever 37, Fig. 2a, operable by a twisted rod 36 connected to the special key stem 33<a> by a lever 35, Fig. 6a. The pulling forward of the zeroizing handle W results in the rocking of a shaft S, Fig. 1<a>, to disable back-stop pawls &c. and set zero stop arms 2, 4, as described in Specification 131,109. A second shaft S<x> provided for the additional totalizer is adapted to be coupled to the first shaft S by a link 43, Fig. 6<a>, which is lowered by the depression of another special key 44 for simultaneous zeroizing of the two totalizers. The second shaft S<x>, however, merely sets the zero stop 2<x>, 4<x>, since the backstop pawls &c. serve for both totalizers. To prevent simultaneously zeroizing should the two totalizers have been left in gear, a roller 12 on an arm of the shaft S engages a cam 60<a>, Fig. 6<a>, on lever 60, and moves it rearwards. The end of the lever 60 engages a projecting portion 36<c> of the rod 36 and moves it rearwards to open the clutches. The key lever 35 engages a slot 35a in the rod 36 to permit of this movement independently of the release of the key 33. Should the additional totalizer be out of gear and therefore locked when simultaneous zeroizing is attempted, a pin 44b on the stem of the special zeroizing key 44 engaging a slotted lever 46 rocks this lever and pushes forward a twisted rod 49. This rod moves a lever 50, Fig. 2a, to shift laterally a shaft 51 on which the locking-plates 41 are carried. The locking-plates are thus moved away from the locking pins 40, and the wheels of the front totalizer are free to rotate backwards under the influence of their transfer springs.