483,113. Calculating-apparatus. BURROUGHS ADDING MACHINE CO. Oct. 12, 1936, No. 11384/37. Convention date, Oct. 12, 1935. Divided out of 483,086. [Class 106 (i)] In a machine having a plurality of totalizers carried on a movable support a selecting means is provided to control the movement of the support to a position in which a selected totalizer can be acted upon by a shifting means, the shifting means operating automatically when the selected position is reached to cause the shifting means to move the selected totalizer relatively to its support into operative position in relation to the differential actuating mechanism. The invention is shown as applied to a machine of the Burroughs portable type with control keys and mechanism for controlling the desired kind of operation as set forth in Specification 483,086. The machine described has a main totalizer 10, Fig. 1, and a group of ten totalizers mounted on a rotatable magazine or drum comprising a circular plate 132, Fig. 8, fixed to a central shaft and supporting a plurality of pins 134 on each of which a sleeve 131 carrying the totalizer pinions 130 is mounted. When a totalizer has been moved to the selected position Shown in Fig. 8, it is moved on to a pin 135 in a rockable frame 136 and in alignment with the differential actuators 3. The totalizers are selected by rotation of the magazine under the control of a bank of selection keys 163. The stems of these keys co-operate with a latch plate 181, Figs. 2 and 3, and with a control slide 165 having cam notches 164, Figs. 2 and. 4. During a key depression the latch plate is moved rearwardly and rocks a lever 178 which by means of a pin 177 rocks a pair of latch levers 173, 174, so that one of a set of notches in one or other lever engages a stud 172 to lock an arm 171 against movement. As the key depression continues, a bridge 184 on the key stem displaces the control slide 165 in one or other direction, depending on the previous setting, and a pin 166 rocks one or other of the arms 167, 168 to tension their connecting spring 170. The arms 167, 168 have lateral lugs to co-operate with the arm 171 so that when the key is fully depressed the latch plate can return to normal position thereby releasing the latches 173, 174 to free the arm 171 which is moved by the spring 170 to take up the setting of the arms 167, 168. The arm 171 is integral with a yoke 162 having an arm 161, Fig. 1, pivoted to a link 160, the other end of which is pivoted to a pair of stop arms 153, 154 pivotally and slidably mounted on a fixed stud 155. These stop arms have lateral lugs adapted to co-operate with the bent ends of the arms of a spider 146 secured to the magazine shaft 133. As soon as the stop arms are moved the spider is freed and. by means of a gearing comprising a pinion 143, and sector 141 controlled by a spring 140, the magazine is rotated clockwise. The pinion 143 is attached to a ratchet wheel 144 connected by a pawl 145 to the spider whereby backward rotation of the magazine is prevented. The spring 140 is tensioned by power from the main drive shaft 4 by means of a slotted link 147 connected'to the shaft 4 and the gear sector 141. At the time the magazine is arrested a collar, on the selected totalizer, with an annular slot 200, Fig. 5, engages a lug 201 on a driving member 202 connected to an arm 204 pivoted on a shaft 205 carrying a second arm 206 controlled -by a spring 208 and formed with a lug 207 engaging the arm 204. The arm 206 is normally prevented from moving by a latch 210, Fig. 6, engaging a stud 211 on the arm; a second latch 212 is also adapted to co-operate with the stud, the two latches being connected by a spring 213. In the normal position as shown in Fig. 5, the latch 212 is free since its rear end is held raised by the stop arms 153, 154 which are in their upper position by reason of the influence of the spider 146 and spring 140. During the selective rotation of the magazine pins 215 on the plate 132, Fig. 7, rock a lever 216 to disengage the latch 210. At the same time the stop arms are lowered and the latch 212 is rocked into engaging position with the stud 211 permitting a slight rocking movement of the arm 206. When the magazine arrives at its selected position the stop arms 153, 154 are again raised to rock the latch 212 thereby freeing the arm 206 which under the action of the spring 208 automatically moves the selected totalizer into its active position in the frame 136. As the selected totalizer is returned to the magazine after each calculating operation if the same totalizer is to be used again the latches 210, 212 which have returned to the - normal Fig. 8 position must be released by other means since the magazine is not rotated. For this purpose the magazine motor bar 220 carries a stud 222 that co-operates with a lever 223 having a pass-by pawl 225 to engage a bellcrank 227, one arm of which overlies the tail of the latch 210 so that the latch is freed when the motor bar is depressed. Since the latch 212 is held in released position the arm 206 is completely released to transfer the totalizer to its active position. A similar action occurs when the upper totalizer motor bar 33 is depressed. The arm 204 is held in displaced position by a latch 230 which is freed near the end of the cycle of operation. During the forward stroke a roller 19, Figs. 1 and 7, operatively connected to the main shaft 4, is raised to the dot-dash position and raises an arm 232 which is latched in position by a bellcrank 237, Figs. 7 and 8. The arm 232 has a surface 235 which during the latter part of the movement of the arm engages a tail 236 on the arm 206 so as to move the arm 206 relatively to the arm 204 thereby extending a connecting spring 240. As the roller 19 is lowered during the return stroke it releases latch 237 to free the arm 232 which on its return, through a projection 241 thereon, strikes the tail of the latch 230 to free the arm 204 which acts automatically to return the totalizer to the magazine. When a totalizer is moved out of the magazine the magazine is locked by a bell-crank 242 engaging over one of the pins 215, the bellcrank being moved to inoperative position by a pin on the arm 204 engaging a projection 245 on the bell-crank when the totalizer is returned to the magazine. The bell-crank also controls a locking means for the selection keys 163. For this purpose the lower arm of the bellcrank 242 has a pin 247 underlying one end of a lever 195 fixed to a shaft 194, Figs. 1 and 2, which shaft has an arm 193 connected by a link 192 to an arm 191 having a notch adapted to co-operate with a lug 190 on the latch plate 181. The lever 195 has a stud 196 underlying an abutment 197 depending from the link 160 that is connected to the stop arms. By this means when a totalizer is out of the magazine or the magazine is being rotated, the lever 195 is operated to raise the link 192 to lock the latch plate 181. Total-taking mechanism. By depressing a " credit balance " key CR and the motor bar 33 a negative total may be taken from the main totalizer 10 in an uninterrupted two-cycle operation of the machine as described in the above-mentioned Specification. The negative total complement is taken from the main totalizer 10 and simultaneously subtracted from one of the totalizers 130, the printing mechanism is disabled during the first of the two cycles and the true negative total is obtained and printed by a total-taking operation on the totalizer 130 during the second cycle. As only nine of the totalizers 130 can be selected by the nine selection keys 163, means is provided for selecting automatically the remaining totalizer for participation in the negative totaltaking operation. For this purpose the stem of the " credit balance " key CR, on depression rocks a bell-crank 360, Fig. 1, and a pin 361 co-operates with an arm of a latch 363 to free a bell-crank 364 that bears on the arm 161 and rocks it to cause the link 160 to move the stops to select the No. 10 totalizer and move it to active position. Specification 483,112 also is referred to.