Patent GB-190922862-A (GB)
Title: Improvements in Apparatus for Adding or Calculating.
IPC: G06C19/04
Filed: 1908-12-10
Granted: 1909-12-10
Abstract: 22,862. British Adding Machine Co., and Browning, W. H. Dec. 10, 1908, [Convention date]. Adding-apparatus. - In a multiple-bank key-set lever-operated adding and listing machine of the type described in Specific a t i o n s 3383/04 and 26,763/08, the calculations are effected for each denomination on counting- plates which are moved into gear and raised a given distance for each unit by means of quadrants set in position by the keys and control lever of the machine. Improvements are described in connexion with means for eliminating non-additive items, printing zeroes of the items to the right, effecting a "split" when two or more eliminating- keys are provided, setting-up and taking a total with means for (a) zeroizing the counting-plates, and (b) preventing printing of zeroes to the left. A side elevation of the machine is shown in Fig. 1 and a plan in Fig. 3. The main and auxiliary counting-plates A, A<1> and the type-setting plates B are mounted in a swinging or sliding frame A<2>. The plates A, B are adapted to gear with toothed quadrants C, C<1> respectively mounted loosely on a shaft c and moved simultaneously by a connecting - lever C' engaging pins c<1>, c<2> on the quadrants. The lower end of the lever C<2> has a notch engaging a pin e on a control bar E capable of sliding to and fro and having a series of projections or stops e<1> one for each key, which engage the lower ends of the keys when they are depressed. Varying functions of machine. - An eliminating - key L<2> is provided to lock the quadrants C when it is desired to disconnect the keys K from the main plates A, while the type-setting plates B may be operated to print a total. The key L<2> is connected through a link l<2> and lever L<1> to the eliminating-bar L, which, when raised, engages notches c<6> in the quadrant C. Instead of a single eliminating-key, two or more keys L<2>, L<4> may be employed, the key L<4> being used to lock the quadrants of the higher denominations. The keys L<2>, L<4> are locked by a bar l<5>, and an additional lock to prevent depression after any of the numeral keys have been depressed is effected by a bar l<4> which enters a notch in the keys when moved by a pin k<7> on the locking-bar k<4>. Controlling printing of zeroes. - To print the zeroes to the right, the rear end of a control lever M is raised by the depression of the keys and a finger m<3> on the lever projecting below a finger m<4> on the next lower lever raises it to allow its end to move out of contact with the pin c<3> on the quadrant c', permitting the latter to fall one tooth to print "0" when the plate B is raised. When two eliminating-keys are used, a split may be effected by providing one of the control levers M with a sliding finger m<5>, Fig. 3, which, when the eliminating-key L<4> is depressed, is moved out of the path of the finger m<4> of the next lower lever and so prevent movement of the lower type plates B. Printing totals.-The depression of a totals key N<3> through a link n<5> raises a total frame plate N, and a catch n<2> on its stepped plate N' engages a pin n<3> on the control bar E, which moves forward, being released by a lever N<2> depressing the release member K<1>, until a pin n<1> on the counting-plates arrests the plates N<1>, the quadrants being then set in position for taking a total. (a) A grand total key N<5> besides acting as the key N<3> enables the counting-plates to be zeroized. The key when depressed raises a plate P, Fig. 1, attached to the frame A<2> and moves the pin p<6> out of a notch, so that when the frame A<2> returns to normal position, the pin p<6> pushes a second plate backwards and moves the bolts F<1> out from engagement with the teeth of the plates A', which then return to normal position. The plate P is held up in the forward and back position by notches engaging with pins p<4>, p<5>. (b) To prevent printing of zeroes to the left, control levers R are pivoted below the total plates N, and are provided with projections r<4>, r<5> for engaging similar projections on the next levers, and with hooked ends for engaging notches r<2> in the counting-plates which have not been moved. A locking-slide S is provided to indicate when the parts are in a correct position for taking a total, and has a pin s<3> lying above the top of the link n<5> to lock the totals keys against operation should the parts be not in such a position.