Patent GB-307407-A (GB)
Abstract: 307,407. Baumann, A., and Horlacher, C. P. Nov. 7, 1927. Multiplying-apparatus.-In a machine employing representations of the partial products the depression of a motor trip bar controls the setting of the partial product devices in accordance with the depression of the multiplier and multiplicand keys whereupon the partial products are segregated according to their denominational value and transmitted to receivers and accumulated thereon to produce the final product, the excess. accumulation in one order being transferred to the next higher order. The product thus obtained is transmitted to type bars and printed on a record-strip together with the factors. The various parts of the mechanism and the keys are restored upon the return movement of the operating parts to normal position, means, however,. being provided to prevent restoration of the multiplier keys should it be necessary to retain the multiplier setting for the succeeding operation. Keyboards.-As shown in Figs. 7, 8, and 10, two sets of key banks are provided the left hand one for the multiplier and the right hand one for the multiplicand. The keys 10 are normally retained in raised position by springs 12 and are held in depressed position by detent bars 14 cooperating with shoulders on the key stems. Each key bank is associated with a clear key and separate clear keys are provided for the multiplier and multiplicand sets. These keys, Fig. 10, have cam projections 34 co-operating with pins 33 on a corresponding bar 31 having lugs 30 in the path of pins 29 on the detent bars 14. The bars 31 are also arranged to be actuated at the end of an operation to clear the key board by means of a link 36; in the case of the multiplicand key bank the link has a lug engaging one of the lugs of the bar 31, the connection between the link 36 and the multiplier section bar 31 is through a coupling slide 37 passing through a guide on the bar and a slot in the link so as to permit independent movement of the bar 31. Withdrawal of the slide 37 by depression of the repeat key, Fig. 10, prevents the restoring of the multiplier keys. Each key stem has pivoted thereon a spring controlled finger 16 the upper edge of which bears against the latch 14 so that on depression the lower end of the finger is moved within the margin of the key stem. A frame, Fig. 11, comprising parallel bars 18 is guided for vertical movement on shafts 20 and when raised during the operation cycle strikes against the fingers of partially depressed keys to raise then and thereupon lock all undepressed keys. The lower end of the key stems co-operate with lugs 23 on differential stop bars 22 guided on grooved shafts 24. A stop 25 on a bar 26 carried by links 27 is normally in the path of a lug 23 of each stop bar and is removed therefrom to free the stop bar when the end of the key stem strikes the bar 26. Setting up partial products. - These devices comprise a series of groups of elements corresponding to the number of banks or multiplier keys and each group comprises elements arranged in pairs for the units and tens of the partial products of the digits. Each element, Figs. 6, 13, and 14, comprises a bar 45 with an enlarged head 46 provided with steps 47 and a projection 50 in a slot 49 and co-operate with a tappet 48 and stop 480. The bars are guided by rods 51, a comb plate 53 and a bar 54, the latter being pivoted on a shaft 55 and serving as an aligning means for the bars. The tappet and stop extend from shanks 58, 57, Fig. 28, and axe vertically movable in guides 60, 59 on cross heads 61, 62. The shanks are connected by a pin and slot connection 65, 66 and a similar connection is provided between the shank 57 and a bell crank lever 67 associated with the corresponding pair of differential stop bars 22. The tappet 48 is normally in the dotted position shown in Fig. 13, so that when the pair of stop bars is permitted to move in accordance with the key depressed the tappet 48 and stop 480 are raised and presented to the appropriate steps whereupon movement to the left of the tappet by the cross head 62 as hereinafter described causes a movement of the bars 45 until arrested by the stop 480. The selection of the particular pair of bars 45 from each group is effected by connections with the multiplicand differential stop bars 22 comprising a bell crank lever 70, link 71 and slide 72, Figs. 2, 17 and 19. The slides 72 have pairs of slidable couples 74 one pair for each group of bars 45, each coupler having a lug 75 adapted to enter a notch 76 in a bar 45, the notches in the units bars of each group being aligned and those in the tens bars being aligned also. The notches are so spaced that when a lug enters a notch of the units bar the other lug of the pair is in the notch of the tens bar except when the multiplicand setting is " 0 " or " 1 "; in the " 0 '' position both lugs are held by fixed lugs 78 on stationary plates 79, while at the " 1 " position only the lugs associated with the tens bars will be so held. Receiving mechanism.-The couplers 74 are guided for movement by pins in slots on the plates 72 and each coupler has a pin 81 enlarged and slotted to engage a head 82 on a slidable member 83. The members 83 are arranged in pairs as shown in Fig. 15 and each has a slot 86 co-operating with a pin 87 projecting through a guide slot 88 in a plate 84, Fig. 19, and connected to an element 89 having a pin 90 projecting through another of the guide slots 88, the elements being arranged as shown in Fig. 16. A series of shafts 91, Fig. 18, beneath the elements 89, are arranged along the lines of movement thereof and each shaft is provided with one or more stepped receivers 93, Figs. 20 and 23, adapted to co-operates with an index or lug 95 on a corresponding collar 97 provided with a rib engaging the forked end of the stirrup 99 forming part of the elements 89, the number of receivers in a line corresponding to the number of elements in that line. By shifting the collars along the lines in accordance with the partial products and allowing the shafts 91 to rotate until arrested by the engagement of the steps thereon with the lugs 95 the partial products of the same denomination will be accumulated on the shafts. Totalizing mechanism.-Each shaft 91 is hollow to receive a spring 100 fixed thereto at one end the other end being secured to a stem 102 passing through the shaft and integral with an adjustable plug 103 for varying the tension on the spring. The forward receiver in each bank takes into a sleeve 107, Figs. 20 and 23, having a bearing in a head 108 secured to the shaft 91, a spring bearing on lugs on the sleeve and head providing a. limited lost motion connection. Each sleeve 107 is slotted at 96 to receive the first index 95 and the second index 95 coacts with a slot 96 in the first receiver and so on. The sleeve and each receiver is formed with a lug 934 for co-operation with a lug on the adjacent receiver on the resetting operation to bring the receivers to the zero position the lost motion connection permitting the necessary play. The receiver in the first bank and the uppermost receiver in the second bank are held stationary by pins 931 and these receivers serve to arrest the indices. In the other banks the receivers are arrested by their projections 269, Fig. 20, engaging a frame 119. Each shaft 91 has fixed thereto a stepped head 110 which can serve as an indicator of the product. Transfer mechanism.-The second and higher shafts 91 have each a disc 112 fixed thereto with a cam part 113, Figs. 20 and 22, co-operating with a toothed sector 114 connected, through spring means 116 with a sector 115 engaging a rack 117 having a stop 118 arranged beneath the shaft of next higher denomination. The end receiver is formed at its end opposite the stops 94 with stops 940 to co-operate with the stop 118, the rotations of the lower shaft determining the position of the stop 118 with respect to the stops 940 and thus the number of additional step movements of the higher shaft. Printing mechanism.-Each head 110 is felt by a spring controlled slide 120, Figs. 6 and 28, when the latter is freed by the operating mechanism and the movement of the slide is transmitted through a flexible link connection 124 to an. arm 126 having pivoted thereon a type bar 128 normally held away from a platen 131 by a spring 132 with the " 0 " below the printing line. Type bars 133 similarly supported by arms 134 and flexible links 135 are connected to slides 137 having pins 139 bearing on the ends of the differential stop bars 22 to take up the settings of the multiplier and multiplicand key banks. The impression mechanism comprises spring controlled hammers 144 loosely mounted on a shaft 143 and normally latched by a trip bar 145 on arms 147 and by individual hammer latches 154 with overlapping projections 157 for the control of zero printing. The arms 147 are connected by links 149 to arms 150 fixed to a shaft 151 and attached at their lower ends to an aligning bar 152 co-operating with the toothed segments of the arms 126, 134. The hammer latches 154 are provided at their ends with tips 156 which, on movement of the arms 126, 134, are engaged to free the latches, the hammers so released being subsequently freed for impression by a. movement of the shaft 151 to move the aligning bar into operative engagement and to withdraw the trip bar 145. Operating mechanism.-A motor 4, Fig. 2, drives a shaft 174 geared to a shaft 177, Fig. 5, with two helical grooves 178 adapted to be engaged by one or other of a pair of nuts 179 through a sliding clutch member 181 operated by a shifter 182 slidably mounted on a cross head. The shifter is retained in either of its set positions by latches 183, the right hand latch, Figs. 5 and 26, being connected by a spring to an arm 193 engaging, in the normal position, a shoulder on a bar 195 connected by an arm to the shaft 197 of the trip bar 3. The arm 19