Patent GB-464508-A (GB)
Abstract: 464,508. Calculating-apparatus. AKTIEBOLAGET EKONOMIREGISTER. July 19, 1935, No. 20627. Convention date, July 20, 1934. [Class 106 (i)] In a machine having a plurality of adding and subtracting totalizers and control means for selecting the totalizers the control means is constituted by a bank of keys one or more of which are adapted to select a predetermined group of totalizers for actuation and to set a particular totalizer of the said group for total taking or subtotal taking purposes and to set the remainder of the selected group of totalizers to receive additively or subtractively the amount from the particular selected totalizer. The invention is shown applied to a machine similar to that described in Specification 360,842. The amount keyboard, and the differential actuating mechanism are of the known type. A set of selection keys 1-8, Fig. 1, are operatively connected to engage the totalizers with the actuators in accordance with the diagram, Fig. 3. The machine has six totalizers three of which are shown in Fig. 2, the others being axially aligned therewith. Each totalizer comprises pairs of interengaging pinions 11, 12, 13, 14 ; 15, 16, for addition and subtraction and one or other of the pinions can be engaged with the intermediate wheels, such as, 17, 18 or 19 under control of the keys. A key when depressed lowers a rod 20 and through a linkage 21, 22 rocks a corresponding shaft 23 on each of which is secured a number of arms 24 the number depending on the arrangement of connections shown in Fig. 3. Each arm 24 is connected by a wire 25 to an appropriate bellcrank 91b, 91c &c., and these in turn are connected by wires to the members effecting the selection. Regarding the totalizer III the pinions 15, 16 are mounted on a bridge or frame 115 pivoted at one end to a spring- controlled lever 113 and supported at the other end 119 on an arm 132. The spindle 183 of the pinions 115 extends beyond the frame and is held by a bell-crank 95. The lower arm of the lever 113 is retained by a pawl 105 to which is attached a wire 103 connected to the bell-crank 91b, the bell-crank 95 is connected by a wire 97 to the bell-crank 91c, and the arm 132 is connected by a rod 127 to one arm of a three-armed lever 123 mounted on a shaft 120. The lever 113 is loose on the shaft 111 and is engaged by a rod on an arm 145 secured to the shaft 111. This arm is connected by a link system 147, 144, 143 to a pivoted arm 142 carrying a roller 141 that co-operates with a cam disc 27 secured to the main shaft. The cam disc is provided with a projection carrying a roller 58 that co-operates with the arm 126 of the three-armed lever 123. Each totalizer is provided with a similar set of controlling members. If the key " 3 " is depressed the bell-crank 91b pertaining to the totalizer III will be rocked to withdraw the pawl 105 from engagement with the lever 113 and the bell-crank 91c pertaining to the totalizer VI will be rocked to remove the bell-crank (95VI) from the spindle (183VI) When the main shaft is operated the cam discs 27 are rotated and the roller (58VI) moves in a clockwise direction, Fig. 2, until it raises a latch (125VI) to free the arm (126aVI) of the three armed lever (123VI) which under spring action is rocked to lower the rod (127VI) and arm (132VI) and the pinions (15VI) are caused to engage the intermediate gears (19VI). At the same time the roller 141 pertaining to the totalizer III following the cam disc 27 is lowered and causes the shaft 111 to rock and withdraws the arm 145 from engagement with the levers 113. The lever 113 rocks and displaces the frame 115 to the left so that when the rod 127 is lowered the pinions 16 are caused to engage the gears 19. During the return movement of the shaft 50 the totalizers are actuated and at the end of this movement the respective rollers 58 again engage the corresponding arms 126 to restore the levers 123 and disengage the totalizers. Total and sub-total taking and transmission of amounts between totalizers. For this purpose certain of the keys, for instance the key " 6 " is connected through its shaft 23, the arms 24 and links 25 to bell-cranks 91j, 91c and (91dI) so that on a machine operation a sub total is taken from the totalizer I and the amount at the same time transmitted to totalizer III. The bell-crank 91j withdraws bell-crank 211 from engagement with pin 212, the bell-crank 91c withdraws the bell-crank 95, and the bell-crank (91dI) pulls on a link (201I) so as to free the arm (126aI) of the threearmed lever (1231). When the main shaft 50 is operated the rollers 58, (58I) for the totalizers III and I leave the arms 126, (126I) and the latter being freed casues the totalizer I to engage the intermediate wheels 17 of the actuators directly so that on the continuation of the forward stroke the actuators receive a setting corresponding to the amount standing on the totalizer I. At the end of the forward stroke the latch 125 is freed and the threearmed lever 123 is rocked to cause the totalizer III to engage the intermediate wheels 19. During the return movement of the shaft the amount is put back into totalizer I and added to the amount contained in totalizer III, the totalizers being disengaged at the end of this operation. The mechanism for ensuring that a total shall be taken comprises for example, for the totalizer III a latch 91e for an arm 122 pivoted on the main shaft 50 and having a projection 122b co-operating with a pawl 202.pivoted on a stud 207. Integral with the pawl 202 is an arm 206 the free end of which is in the path of movement of the projection 140 on the cam disc 27. To the arm 122 is pivoted an arm 204 with a slot engaging a pin 205 on the three armed lever 123, a spring 121 connecting the pin 205 to the arm 122. When the totalizer is moved into engaging position on the forward stroke as in a subtotal taking operation the three-armed lever is rocked anti-clockwise and the pin 205 slides in the slot of the arm 204 since the arm 122 is held by the pawl 202. At the end of this movement the projection 140 on the cam disc 27 then engages the arm 206 to free the pawl 202 and the arm 122 under the action of its spring 203 raises the three armed lever 123 which through its connection link 127 raises the bridge 115 to disengage the totalizer before commencing the return stroke.