Patent GB-901406-A (GB)
Abstract: 901,406. Multiplying-machines. OLYMPIA WERKE A.G. Oct. 2, 1958 [Oct. 4, 1957], No. 31469/58. Class 106 (1). A ten-key calculating machine for the four rules having a carriage carrying a totalizer and a counter comprises a clutch which on engagement effects the entry of a set amount into an actuating mechanism comprising two sets of gear-wheels, a main clutch which on engagement causes the transmission of the amount registered in the actuating mechanism to the totalizer or counter and a cancellation clutch which when engaged re-sets the actuating mechanism. Multiplication and division are effected by the repeated operation of the main clutch and hence of the actuating mechanism. Setting mechanism.-Depression of a key 50, Fig. 2, rocks a corresponding lever 57 to raise a pin 62 of the pin carriage 63. A lever 81 common to all of the keys is also rocked to raise a shift pin 73 and at the same time to rock a lever 84 having rack teeth 86 which cooperate with an ear 87 of the pin-carriage which is thus able tomove one step under the action of a spring until the next pin 73 engages the end of the lever 81. When the shift pin is raised, it releases a rack 67 carried by the pincarriage frame and the rack moves into abutment against the projected pin 62, setting an item wheel 74. Addition.-Depression of an Add key 100, Fig. 4, rocks a lever 105 which closes a motor switch 115 and engages an add clutch 122 which in turn engages an actuating clutch 134. The latter acting through mechanism conditioned by the add key then engages a main clutch driving a mainshaft 10, Fig. 2. The actuating clutch raises a bail 7 to release auxiliary bars and similar connected bars 9 which are moved by springs until the auxiliary bars abut against the racks 67. The auxiliary bars are closely spaced to correspond with the spacing of the orders of the setting mechanism whereas the bars 9 are more widely spaced to correspond with the orders of the actuating mechanism. The latter includes sets of pinions 11, 12 on shafts 13 and 14 carried by frames 23, 24 independently rockable about a shaft 10. Cam arrangements, Figs. 5 and 7 (not shown), driven by the mainshaft 10 and the actuating clutch 134 respectively, enable these frames to be rocked so as (a) to mesh the pinions 12 with totalizer primary wheels 220 and (b) to mesh the pinions 11 with the pinions 12. Each pinion 11 has a lateral projection 15 which initially engages the underside of a flange 25 of the frame 23 and which can be engaged by a corresponding tooth 17 fast on the shaft 13. Similarly, the pinions 12 have projections 16 which co-operate with a flange 26 and teeth 18. The sequence of operation is shown diagrammatically in Fig. 25. Initially, Fig. 25 (a), the pinions 11 engage racks on the bars 9 and are disengaged from the pinions 12. The teeth 17 and projections 15 respectively engage the upper and lower sides of the flange 25. The teeth 18 hold the projections 16 against the flange 26. Then, Fig. 25 (b), as the bars 9 move into contact with the racks 67 they differentially position the pinions 11. The pinions 11 are then disengaged from the bars 9 and meshed with the pinions 12 which also engage the totalizer wheels 220. The shafts 13, 14 are then rotated in opposite directions by cam means, Fig. 6 (not shown), driven by the main shaft 10, so that the teeth 17 restore the pinions 11 and transfer their settings to the pinions 12 and also rotate the totalizer wheels 220 by corresponding amounts as indicated at Fig. 25 (g). The pinions 12 are then disengaged from the wheels 220 after which the shafts 13, 14 are restored to cause the teeth 18 to restore the pinions 12 and so to reset the pinions 11 as at Fig. 25 (1). At this stage, the cycle may be repeated for multiplication purposes. However, near the end of an add operation, the main clutch engages a cancel clutch which re-engages the pinions 11 with the bars 9 as indicated at (b), and rotates the shaft 13 clockwise to restore the pinions 11 and then counterclockwise to the position shown at (a). The cancel clutch also effects the release of the Add key. The actuating clutch also rocks cams 184, 196, Fig. 2, which restore the racks 67 (which are followed by the bars 9) and the pin carriage 63 together with the set pins 62. The totalizer primary wheels 220 are carried in a totalizer carriage 93 and are geared to number wheels 225. Subtraction.-The totalizer carriage has a pawl 252, Fig. 21, engaged by a rack 264 and on depression of the Subtract key, a subtract clutch, Fig. 18 (not shown), is engaged to shift the rack 264 so as to cause the pinions 12 to be aligned with subtract totalizer primary wheels 221, Fig. 17, instead of with the wheels 220. The wheels 221 are geared to the number wheels 225 through additional intermediate wheels 231 so as to reverse the drive. In other respects the subtraction and addition operations are the same. Entering a multiplier.-Depression of a multiplier key 265, Fig. 4, acts through a lever 269, Fig. 21, to disengage the rack 264 from the pawl 252 of the totalizer carriage and also through a lever 271, Fig. 14, raises a tooth 274 which engages a stop 288, Fig. 17, on the totalizer carriage when the latter is moved leftwards by its spring. A counter 217, of similar construction to the totalizer 216, is thus aligned with the actuating mechanism. The tooth 274 is carried by a slide 272 which is moved slightly when the carriage is arrested and is arranged to actuate the main clutch. The multiplier key 265 itself actuates the lever 105 which engages the add clutch. Thus the multiplier previously set into the pin-carriage is entered additively into the counter. The cancel clutch is engaged by the main clutch so as to reset the actuating mechanism. Multiplication.-The multiplicand is then set into the pin-carriage. Depression of the multiplication key 290, Fig. 16, then engages a carriage return clutch 295 which, acting through a string, restores the carriage to the extreme right. This movement ends when a projection 309, see also Fig. 17, on the carriage rocks a lever 310 to disengage the clutch. The multiplication key also engages the add clutch to initiate an add cycle but, in this case, the key rocks a shaft 64 to break the connection between the main and cancel clutches so that the actuating mechanism is not reset but remains at the end of the cycle in the state represented in Fig. 25 (1). Moreover, a lever 317 is rocked to raise an arm 312, Fig. 14, pivoted on the slide 272, to place a tooth 319 in the path of the first of a series of multiplication levers 320, see also Fig. 17. At the end of the carriage return movement, the carriage is moved slightly to the left by its spring and the first (left-hand) lever 320 engages the tooth 319 and so shifts the slide 272 which engages the main clutch. As the slide 272 is held in shifted position, the multiplicand is repeated entered into the totalizer. During each cycle, a counter actuator 344, Fig. 4, is operated to step back the counter wheel in operative position (initially the highest order wheel). When that wheel reaches its zero position, a tooth on its intermediate wheel 231 rocks the associated multiplication lever 320 and so releases the slide 272 to stop the machine. However, the spring then moves the carriage one step to the left until the next lever 320 engages the tooth 319 and again shifts the slide 272 to initiate a further series of repeat cycles in the next lower order. After the last series, the carriage makes a further step and a projection 323 on the carriage causes a pre-cancel clutch, Fig. 22 (not shown), to be engaged. This restores the carriage, releases the depressed function key and engages the cancel clutch to reset the actuating mechanism. Negative multiplication.-Depression of a Negative Multiplication key instead of the key 290 causes an arm carrying a tooth 426, Fig. 14, to be raised instead of the arm carrying the tooth 319. Thus, throughout the operation, the subtract gears of the totalizer are aligned with the actuating mechanism instead of the add gears. Multiplication by a constant.-Operation of a hand lever similar to the lever 414, Fig. 24, engages racks 406 with the counter wheels so that during a subsequent multiplication, the racks are set in accordance with the multiplier. Then, operation of the lever 414 restores the racks to re-enter the multiplier into the counter for a further multiplication operation. Entry of dividend.-The Dividend key is depressed after setting the dividend into the pin-carriage and causes the engagement of a division clutch. Fig. 11 (not shown), which through a cam, disengages the pin-carriage ratchet 85, Fig. 2, to allow its spring to move it to its extreme leftward position. The key also engages the carriage return clutch to cause the totalizer carriage to be moved to its extreme rightward position, and raises the tooth 274, Fig. 14, which, when the totalizer carriage is released once more to its spring, is engaged by the pawl 252, Fig. 17. This moves the slide 272 which engages the main clutch. The add clutch is again engaged by depression of the key and so the dividend is entered into the totalizer and then by operation of the cancel clutch, the actuating mechanism is reset. Division.-After the divisor has been set in the pin-carriage, a Division key is depressed. This engages the division clutch again to cause the pin-carriage to be moved to its leftmost position, disengages the rack 264, Fig. 21, from the carriage pawl 252, engages the add clutch, disengages the connection whereby the main clutch normally engages the cancel clutch, and through a lever 361, Fig. 14, raises a division rack 358 into engagement with the carriage pawl 252. The teeth of this rack are so spaced that the subtract and add wheels of the totalizer are aligned with the actuating mechanism, alternately. Initially repeated subtractions take place until a tooth 364, Figs. 2 and 17, on the hi