Patent GB-360842-A (GB)
Abstract: 360,842. Calculating -apparatus. SVENSSON, W. A., Saltsjo - Storangen, Stockholm. July 9, 1930, No. 20834. [Class 106 (i).] Adding and subtracting apparatus.-A machine for use in keeping business accounts comprises at least four totalizing-counters each adapted to be set for addition or for subtraction in accordance with the four fundamental accounts, viz. assets, liabilities, profit, and loss, selecting mechanism for preparing said counters for actuation, and a common engaging mechanism for rendering at least two of said counters operative simultaneously. In the embodiment shown the machine comprises three sections A, B, C, Fig. 2, each being provided with a pair of totalizers adapted for addition and subtraction and with a printing mechanism TA, TB, TC. The sections are controlled by a common keyboard D comprising banks of amount keys L, banks of date keys G, H, K, a bank of analysing keys E, a bank of restoring keys F, and special keys K+, K-, L. The analysing and restoring keys are connected up in accordance with the diagram, Fig. r, to a set of totalizing-counters representing the assets counter RA<1>, the liabilities counter RB<1>, a totals counter T for all items registered, a results counter RC<1>, a profits counter RB<11>, and a loss counter RA<11>. In this diagram the letters T, S, V, F designate the factors assets, liabilities, profit, and loss respectively. Differential mechanism.-The stems 10 of the amount and date keys, Figs. 4 and 5, co-operate at their lower end with a pivoted latch plate 16 which normally engages a projection 21 on a spring-controlled differentially movable bar 14. When a key is depressed the latch plate is rocked and the bar 14 is free to move, the movement, on operation of the machine, being limited by the upper projection 25 on the bar engaging a lateral lug 22 on the depressed key. The analysing and restoring keys have stems 40, Figs. 3 and 6, cooperating with bell cranks 44 and releasing bars 50. Each bar 50 is provided with three abutments 54, 56, 58 which coact respectively with a restoring plate 60, a stop bar 80, and the abutment 84 of the corresponding differential bar 14. When a key is depressed the bar 50 rises under spring action so as to raise the stop bar 80 out of the path of movement of the abutment 84. Movement of the bar 14 is arrested by the abutment 84 meeting the abutment 58 of the elevated bar 50. The restoring plate 60 is connected by a link 64 to a lever 68 in operative relation with an arm on the main drive shaft 100 and serves to restore the bars 50. The analysing keys (Nos. 1 .. 4, 6, 8) are connected bv wires 98 to bell-crank levers 94 on shafts 90. The corresponding restoring keys are connected by wires to bell-crank levers 96 on shafts 92. The keys Nos. 5, 7 are not provided with levers since they influence only the totalizing counter T. The shafts 90, 92 extend across the three units and wires 106 connect each of the levers 94, 96 with one positive lever 104 and one negative lever 102 associated with the totalizers of the three sections A, B, C. The rear ends of the differential bars 14 are pivotally connected to toothed gears 34 journalled on a common shaft 36. The gears 34 in section C are coupled to the corresponding gears in sections A, B by means of pinions 114a, b, c on a set of shafts 116 journalled in the machine frame. Secured to the ends of the shaft 36 are a pair of arms 134 connected by a rod 136 which normally rests against one of the spokes of the gears 34. The rod 136 is operatively connected to the main shaft 100 which when operated allows the spring 132 to displace the gears an amount depending on the keys depressed. The rod 136 is connected by a link 138 to a crank 140 loose on the shaft 100. To the shaft 100 is secured an arm 142 provided with a pin 144 which engages the crank 140 when the shaft is rotated. Totalizing-counters.-These comprise a series of numeral drums 150 with pinions 152 loosely mounted on a shaft 154 and gearing with pinions 156 loose on a shaft 158. The shafts 154, 158 are carried in bridge members 160 and are normally held with the pinions out of engagement with the intermediate pinions 130 that mesh with the gears 34. The bridge members 160 are pivoted at one end to spring-controlled levers 174 and at the other end are supported by pins on interconnected bell cranks 204, 208. In addition the totalizer shafts 154 are supported by bell cranks 164 connected by wires to appropriate levers 102, 104. The levers 174 are normally held by latches 170 connected by wires to appropriate levers 102, 104. Bearing against the side of the levers 174 are pins 230 on interconnected arms 224, 228 operatively connected through an arm 222 and link 220 with the main shaft 100. Operating means.-When the main shaft 100 is operated a roller 196 on an arm 194 thereon, at the end of the forward movement, disengages a latch 190 from a spring controlled plate 186, the movement of which through a link 202 withdraws the supports 204, 208 from the ends of the bridge members and permits the totalizers, which have had their support 164 displaced, to fall into mesh with the intermediate pinions 130. During this movement if a latch 170 has been operated the arm 174 is free to move, on account of the pin-and-slot connection 216 of the link 220 with the arm 214 of the main shaft, so that the pinions 156 instead of the pinions 152 are enmeshed with the pinions 130 to produce a subtractive operation. On the return movement the setting is transmitted to the totalizers and at the end of the movement the roller 196 engages a cam surface 198 on the plate 186 to effect the restoration of the parts and the latching of the plate 186 by the latch 190. At the same time an arm 70 secured to the main shaft engages the inclined surface on the lever 68 to actuate the restoring bar 60 and raise the analysing and restoring keys. The remaining keys are released in any known manner. During each operation of the machine the totals counter T is thrown into engagement with pinions 262 in mesh with the actuator gears 34. This totalizer is carried by a bell crank 270 operated from the lever 204. Printing-mechanism.-Each actuator gear 34 is provided with a toothed segment 232 which engages another segment 234 that is connected by a link 240 to a type bar 244 co-operating with a platen hammer-impression mechanism in any known manner. The transaction entered is listed by the provision of an additional printing device consisting of type arranged in the lower part of the type bars 244 the impression being made on a strip of paper passing from a roller 252 around a platen PD to a receiver roll 254. Errors keys &c.-If a mistake has been made in entering a transaction the incorrect amount is again set up and the restoring key corresponding to the analysing key previously depressed is actuated so that when the machine is operated the totalizing-counters are restored to the original state. To distinguish this item the printing may be effected in another colour the ink-ribbon being shifted by depression of a restoring key. Operation and item counters.-A step by step ratchet gear (not shown) is operated by the main shaft 100 to actuate a counting mechanism comprising gear wheels 258, 260 and transfer pinions 261. The gears 258 engage actuator gears 34 co-operating with serial numbering type members 244. Varying functions of machine.-The special keys K+, K-, are provided to control a counter for cash. A non-add key L may be provided, the operation of which is adapted to lock the analysing and other special keys. Instead of separate analysing keys a differentially settable member may be utilized for selecting the appropriate counters for actuation. Specification 360,864 is referred to.