Patent GB-301396-A (GB)
Abstract: 301,396. Rheinische Metallwaaren-und Maschinenfabrik S÷mmerda Akt.-Ges. Nov. 28, 1927, [Convention date]. Multiplying-apparatus.-In a machine with an automatic multiplying device the same fields of setting elements are utilized to set up both factors for the multiplication process and depression of a control key initiates the operation. In one form as shown applied to a non-print calculating machine, Figs. 1, 2 and 3, the multiplier setting elements are adapted to be coupled to the differential setting bars controlled by the keys to effect their adjustment and are subsequently withdrawn, the setting being retained. The multiplier setting elements are constituted by slides 4 with steps or projections 26 and mounted in guiding members 14, 15 on elbow levers 17, 16 pivotally mounted in a control carriage 3 slidable on ball races 1 on the frame. The levers 16, 17 are connected by a link 18 which is itself pivoted to an arm 19 on a shaft 20 with a projecting squared end 21 on which is displaceably mounted a key lever 22, 23. Depression of the keys 5 in accordance with the digits of the multiplier effects the setting of the corresponding differential bars 27 and depression of the key 23 raises the slides 4 and permits a series of pins 28 on the member 14 to take into appropriate holes 29 of each of the sets of holes on the corresponding bars 27. The raising of the slides 4 releases them from the one-way pawls 25 whereupon the control springs 24 cause their movement until arrested by the engagement of the projections 26 with the depending ends 30 of the bars 27. When the slides are lowered they retain the setting as the pawls 25 again engage the teeth on their underside. The control carriage is provided with racks 13 engaging pinions 11, 12, on a shaft 10 operatively connected through pinions 8. 9 and a rack 7 to the spring-controlled totalizing counter carriage 6. In operation the totalizing counter carriage 6 and therewith the control carriage 3 is adjusted laterally in accordance with the number of denominations in the multiplier, the multiplier is set on the slides as above described, the multiplicand is then set on the totalizer-actuating mechanism by the same set of keys, and finally the control repeat key is depressed to release the totalizer carriage. The process of multiplication proceeds automatically as the slide, of the highest denomination displaced, engages the nose 33 of a pawl 32, Fig. 4, on a stop 31 and operates it so as to effect a coupling between the driving motor and main operating shaft (not shown). During each operation a pawl 35 engages teeth on the underside of the slide to return it step by step until it reaches the normal position whereupon the pawl 32 is freed and the coupling is disconnected and the carriage displaced one denomination; the process is then repeated. In another form as applied to a machine with printing mechanism, Fig. 7, the multiplier slides are set by the type carriers which latter can be adjusted by the keys or by the mechanism for printing totals and subtotals. The slides 4 in the carriage 3 lie close to and parallel to the type carriers 36 and have projections 26 to engage displaceable bars 30 mounted in the type carriers and guided by slots in a displaceable frame 39. A pawl 40 on the frame 39 engages a projection 41 on the casing 2 to hold the bars 30 out of the path of the projections 26. The totalizer carriage 6 carries a platen 45 and a plurality of sets of totalizers 44 and the casing a totalizer 46 and the modification is described as particularly adapted for calculating accounts of the consumption of electricity. The arrangement of the totalizers is shown in Fig. 6; when the totalizer carriage reaches the column totalizer 44<a> and the consumption as shown on the totalizer 46 is to be transmitted to the column totalizer and type carriers a stop 47 on the carriage engages a lever 48 secured to a plate 49 and moves the plate so that a depending arm 49<a> displaces a slide 55 and through a lever 56, link 57 and arm 58 releases the pawl 40 and permits a movement of the frame 39 so as to place the bars 30 into the path of the projections 26 on the multiplier slides 4. At the same time movement of the plate 49 through the pins and slots 50, Fig. 10, causes a disengagement of the pawls 25 with a consequent movement of the slides 4 to the position assumed by the type carriers. Prior to the printing operation a justifying blade 59 on pivoted arms 61 is moved to engage slots in the type carriers and drawbars 63 connected to the arms 61 and to the lever 48 move the latter from engagement with the stop 47 whereupon the plate 49 is moved to permit the pawls 25 to engage the multiplier slides. At the same time the lower end of the arms 61 engage projections 62 on the frame 39 so as to withdraw the bars 30. When the carriage 6 arrives at the fourth column position for entering the " charge per unit" in the multiplicand differential actuating mechanism, a lever 42 thereon engages a projection 64 on the carriage 3 so that the latter is moved when the carriage 6 is freed by the depression of the control key and the multiplication process proceeds automatically as above described and the result is shown in totalizer 44b. In another modification, Figs. 13 and 14, the carriage 3 with the slides 4 receives a slight movement only and acts directly upon the pawl 32 controlling the coupling between the operating motor and main shaft. The carriage 3 is normally urged by a spring against a stop 67 and the slides in their zero position are arranged to be out of the path of movement of a stop 66 operatively connected through racks 71, 7, and a pinion 8 with the totalizer carriage 6. When the stop 66 meets an adjusted slide it causes the carriage to move against a stop 68 thereby operating the control pawl 32. The rack 71 has a downwardly bent arm 73 engaging the restoring pawl member 35 which effects its adjustment relatively to the slides.