Patent GB-275285-A (GB)
Abstract: 275,285. Watters, L. A., Baumann, A., and Horlacher, C. P. March 8, 1926. Multiplying-apparatus.-In a machine employing representations of the partial products a series of banks of multiplier keys and multiplicand keys controls the setting of stop plates arranged in groups and stepped in accordance with the units and tens of the products of the digits bv themselves. Upon the depression of an operating bar the steps are felt by fingers associated with receiving elements arranged in banks whereby the resulting partial products are set up. The settings of the several denominational banks are transmitted to a totalizing counter, transfer receivers being provided between the successive banks for carrying the excess product of a bank to the next higher bank; the final setting of the totalizer is then transmitted to type members end the result printed. Means are also provided for indicating and recording the two factors, and for restoring the operated parts and depressed keys. Keyboards. - The machine as shown in Figs. 2, 13, and 14, has three banks of multiplier keys and four banks of multiplicand keys; each bank of keys has a latch plate 15 for engagement with a lug 14 on each of the depressed keys. The lower ends of the operated keys cooperate with a plate 22 having a series of differentially positioned lugs 23 whereby the movement of the plate 22 is controlled in accordance with the key depressed. The plate 22 has a flange 24 which normally engages a latch 25 but is freed for movement when a key is depressed by a yoke 28 extending along the key shanks in a recess 29, the yoke being mounted on arms 27, Fig. 16, connected to the latch 25. Setting up partial products.-The units multiplier differential plate 22 has a bracket 62, Fig. 17, slotted to engage an arm of a bell-crank 63 connected by a link 64 to an arm 65 on a rock shaft 66. The other multiplier bars are connected to other rock shafts 661, 662, Fig. 6, the set of shafts forming a nested arrangement and having arms 67, 671, 672 connected with shafts 50. 51, 52, Figs. 2 and 7. On each of these shafts is arranged a cradle 53, Fig 17, secured in position by collars 55 and provided with four sets of stepped product plates disposed as shown in Fig. 2, and comprising units and tens plates 40, 41 separated by a division plate 42. The pioduct plate for the multiplier "3" is shown in Fig. 20, the steps 47, 48 representing the units and tens of the partial products of the digits 1-9. Depression of a multiplier key selects the appropriate plate and aligns the end 45 thereof with the U-shaped coupling 78 of the diagonally disposed vertical slides 75, Fig. 2, corresponding in number to the banks of multiplicand keys. The couplings 78 extend through slots 61 in supports 19, 59, and 60 and are moved in accordance with the multiplicand key depressed by links 74 and bell cranks 71 connected by pin-and-slot means to the corresponding multiplicand differential plates 22 so as to rock the selected plate to present the appropriate steps to the fingers of the receiving mechanism. The non-selected plates are retained against oscillation by U-shaped guides 58 on the support plates in which the ends 45 of the plates move. Receiving mechanism. To the base 1 is attached a series of brackets 85 and guides 87, the brackets increasing in size from either side towards the centre and forming supports for one or more shafts 88. The shafts form denominational banks, the right-hand bank, Fig. 23, having one shaft, the fourth bank, Fig. 7, four shafts and the left-hand bank one shaft. In addition to these shafts the third and higher banks have other shafts for transferring purposes. Each of the shafts 88 carries a stepped receiving element 91 slidable thereon and a pinion 90 engaging a rack on a corresponding link 94, 104, 110, 116, &c., Figs. 44 and 46. The link 94 is guided for movement on a stud 95 and a cross-piece 96, Fig. 7, and to the forward end is pivoted a lever 98 having a pin-and-slot connection to a lug on a cross bar 101 and a similar connection to a finger 102 guided on a cross piece 103. The other links such as 116 and fingers such as 118, Fig. 46, associated with the units multiplier shaft 50 are similarly mounted and connected. The links 104, &c. and 110, &c., for the tens and hundreds multipler shafts 51 and 52 are similarly guided and have pivoted thereto corresponding floating levers 105, 111 &c., having pin-and-slot connections to upper and lower fingers 106; 115, &c., and 114, 402 &c. respectively. The fingers are held in a retracted position, against the action of springs 107 on the links, by lugs 108 engaging pins 109 on an operating plate 286. Unless a multiplicand key is depressed the fingers will be held against movement by latch plates 212, Fig. 18, co-operating with notched plates 210 on the fingers. The latch plates are operatively connected through links 218 and shafts 220 to the plates 22 and on a movement present notches 214 to the plates 210 to free the fingers. When this plate is released the fingers are moved to engage the units and tens steps of the stop plates and through the links and pinions 90 rotate the shafts 88 and receiving elements 91 to present the appropriate steps to projections 93 on members 144 connecting the receivers in each bank. Totalizing mechanism. The connecting members of the receivers are attached by a slot and annular groove to a lower receiver and rest upon an upper receiver as shown in Fig. 25, the lowest connecting member 146 being retained by a spring-controlled collar 342. The uppermost receiver in each bank has an annular slot engaging a slotted member 137 attached to a nut 131 slidable upon a corresponding screwed spindle 126 but held in the raised position by a cross-head 135 against the action of a spring 134 attached by a cord or strap 132 to the nut 131. The crosshead 135, Fig. 22, is attached at its ends to guides 138 slidable on the guides 87 and is held in raised position by latches 139 pivoted on the guides 87. When the latch is released the crosshead moves down under the control of a dashpot 184 and the extent of movement of the nut is determined by the step of the receiver or receivers presented to the projection 93 on the connecting members 144. The shaft 126 is rotated a corresponding amount so as to set an indicating drum or stepped head 148. Transfer mechanism.-To effect carrying-over to the next higher bank when the shaft 126 of the lower bank has rotated more than one revolution Geneva wheels 150, 151, Fig. 38, at the lower end of the shaft co-operate with a rack 155 to set a transfer receiver 161 with five steps in the next higher bank whereby the receivers 91 in that bank are permitted to move an additional step or several steps. Recording mechanism. To print the result standing on the indicating heads 148 a set of stepped slides 163, Figs. 7 and 44, is adapted to co-operate with the steps on the heads 148. The slides are guided on bars and have extensions 174 connected by links 176 to levers 172 connected with vertically slidable type bars 180. The slides 163 are held in a retracted position by a cross bar 170 on arms 240 secured to a rock shaft 239 against the action of springs 167. The factors of a multiplication are also printed by type bars 198 operatively connected with levers 195 similar to the levers 172 and connected in a similar manner to slides 192 which slides have pins 191 co-operating with lugs 190 on the differential bars 22 and are moved to the key-set positions when the cross bar 170 is operated. The impression hammers 182, Fig. 42, are mounted on a shaft 226 and each is tensioned by a spring 229, and retained by a latch 230. An additional latch 234 common to all the hammers is mounted on a shaft 235 having an arm 236. Fig. 50, connected to an arm 237 on a rock-shaft 243, The latches 230 have heels 232 engaging cam surfaces on the levers 172 so that when a lever is moved the latch is released and by means of overlapping projections 242 the hammers of lower order are also released; the movement of the hammers, to effect the impression, is deferred until the shaft 243 is rocked as hereinafter described. The platen 181 is provided with a ratchet wheel advanced by a pawl 248, Fig. 7, on a carrier 249 operatively connected to a rock shaft 239 as shown in Fig. 41. Ink-ribbon mechanism.-The ink-ribbon is canied by a pair of spools each mounted on a shaft 261, Fig. 39, having a bevel gear connection with a shaft 262 on which is mounted a ratchet wheel engaged by a pawl 264 on a link 265 connected to an arm 226 on the rock-shaft 239. Connected to the link 265 and to another arm on the shaft 239 is a pair of cam links 269 which engage rollers on the ribbon carrier for the purpose of moving the ink-ribbon to and from the printing position. Operating mechanism. The depression of a trip bar 275, Fig. 39, through a pin 278, bell crank 279, link 281, and shaft 283 raises a latch 285 to release the operating cross-head comprising two members 286 connected by rods 287 guided in slots in the side plates and pivoted to spring-controlled levers 290. The movement of the members 286 through the rods 109 releases the links 94, 104 &c. of the receiving mechanism to permit of the setting of the receiving elements. At the end of the movement a hook 293 on each of the members 286 engages a corresponding arm 295 on a shaft 296 wherebv the shaft is rocked to relieve the latch 139 to effect the actuation of the totalizer drums 148 by permitting the fall of the cross-head 135. At the end of its movement this cross-head rocks a bell crank 299 and through a link 302 operates a latch 303 to release a lever 304 on the rock-shaft 239 so that the shaft 239 is rocked to permit the slides 163 to set the type bars 180, 198, to effect the release of the common hammer latch 234, and to raise the ink-ribbon. Restoring mechanism. The operating parts are restored to