Patent GB-1196067-A (GB)
Title: Improvements relating to Decimal Calculating Machines.
Inventor: ABBIATI ETTORE
IPC: G06C15/02
Filed: 1968-10-23
Abstract: 1,196,067. Biquinary adding; transfer mechanism. ING. C. OLIVETTI & CO. S.p.A. 23 Oct., 1968 [30 Oct., 1967], No. 50275/68. Headings G4B and G4D. A store for decimal numbers in which each decimal order is represented in accordance with a biquinary code, here described for use in an adding machine, comprises two code sliders for each order, the first slider being settable in five positions and the second slider being settable in two positions. The adding machine illustrated comprises a setting store, Fig. 17, having for each order first and second sliders 52, 53, respectively, a total store, Fig. 18, having similar sliders 152, 153, an adding unit, Fig. 19, in which the quinary parts of an order of the setting store and an order of the total store are added and the sum is entered in the total store, and an adding unit, Figs. 20, 23, in which the binary parts of the same two orders are added, the sum being entered in the total store minus the carry, if any, which is entered in the quinary adding unit, Fig. 19. Setting store.-The addend is entered on the sliders 52, 53, Fig. 17, each of which is provided with a pair of symmetrical stepped profiles 56, 57, and 61, 62, respectively. A carriage 66 is slidable transversely above the sliders and carries levers 73, 74, 78, for setting the sliders, and pairs of sensing pins 88, 89, and 126, 127, for sensing the profiles 56, 57, 61, 62, respectively. The pins are depressed into the sensing position by rocking arms 105, 104, and are connected by linkages to position a slider 298, Fig. 19, according to the magnitude of the quinary part of the addend and to set a crank 473, Fig. 23, pivoted about a fixed pivot 474 according to the carry to the binary part. Total store.-The total store, Fig. 18, is of a similar construction to the setting store. Quinary lever 403, Fig. 18, acts through a linkage to set a slider 281, Fig. 19. Binary lever 483 acts through members 488, 489, 492, Figs. 18, 20, and 23 to se a crank 493, pivoted at 494 on the crank 473. Calculating unit.-The slider 298, Fig. 19, carries sensing pins 304, 303, and 334, 333, having slots engaged by pins on levers 318 and 348, respectively, which are pivoted on spindles 319 and 349. The spindles are lowered to read the slide 281. The pins 304, 303, have slots engaged by studs 432, 422, on centrally pivoted levers 433, 423, which adopt complementary positions and act through linkages to move setting arms 174, 173 and store the quinary sum in slide 152. The pins 334, 333, have slots engaged by studs 514, 513, on a rocking arm 516 pivoted at 517, and linked to bifurcated rods 519, Figs. 20, 23, spanned by a spindle 521. Slidably mounted on the spindle are sliders 451, 452, 453, which are slidable in a frame 454 itself slidable transversely along rods 456. The frame 454 is settable according to the sum of the additively coupled binary cranks 473, 493, so as to position the appropriate slider in line with rocking levers 501, 503. The sliders have projections 458, 459, which cause the rocking levers to rotate when the sliders are shifted forwards or backwards according to the existence or not of a carry from the quinary sum. The lever 501 carries a spindle 531 to which is connected a bar 532, Figs. 23, 18, having a fork 534 engaging a setting crank 177 to store the binary sum in slide 153. The bar 532 is reset by spring jaws 538. The lever 503 carries a spindle 541 to which is connected a rod 542, Fig. 20, communicating with a setting crank 543 to set a slider 551. Rod 542 is reset by spring jaws 547. Sensing pins 566, 567, are lowered to set a binary rocking lever 583. This movement is communicated to a slotted link 366 in the linkage setting the quinary slide 298 in the calculating unit; in consequence, if there is a carry to the next order, a pin 363 in the linkage engages a recess 367 in the slot 364 to advance the slide 298 an extra step.