Patent GB-971110-A (GB)
Abstract: 971, 110. Calculating apparatus. SVENSKA DATAREGISTER A. B. Jan. 31, 1961 [Feb. 3, 1960], No. 3710/61. Heading G4B. Electric digital data signals are transmitted to or from the differential slides of an adding machine or an external storage register. The machine is generally of the kind described in Specification 819,544 in which each order has an accumulator slide 22 and a complementary slide 26 driven in opposite directions from the motor shaft by rocking arms 30, 32. When stored data is used to set a differential slide, the complementary slides are prevented from moving until the accumulator slide is set after which they are released to assume complementary positions. To read out an accumulator to the electrical storage means the complementary slides are locked until the setting of the accumulator has been transferred to the accumulator slides, the movement of these slides generating the data signals, after which the accumulator slides are locked and the complementary slides take up their complementary positions. The remainder of the machine cycle is taken up with restoring the slides, either as a total or subtotal operation (not described). The electric signals are generated as a set of pulses the number of which indicates the distance moved by the accumulator slide. Switch arms 60, 62 are operated by a sinusoidal slot 100 in the slide 22. The arms follow the waveform spaced apart by half a cycle so that as the slide moves contacts carried by the arms make and break. Entering data electrically. A lever 266 (Fig. 6) is moved to the position shown so that member 262a is in the path of the tail of lever 270 pivoted on a rocking arm 258. At the beginning of a machine cycle the data which is stored in complementary form in a binary register is complemented by a signal from a cam operated switch. Next, a control shaft 150 (Figs. 2B and 11) is rotated so that notches 158 receive spring-urged slides 144 causing arms 156 to align with the noses 118b of latch arms 118. A slide 244 is moved upwardly (Fig. 6) by the motor shaft permitting arm 258 to rock anti-clockwise and the lever 270, in view of its contact with lever 266, to move anti-clockwise about pivot 254, shifting slide 272 to the left. This moves a link 130 downwardly in Fig. 11 and with it stop arms 118 to which it is connected by springs 136. The stop arms rest in abutment with the arms 156 in such a position that a projection 128 on each arm 118 engages the end of its associated complementary slide 24 preventing it from moving. Next, the drive means pivots the arm 30 moving each accumulator slide 22 to the left (Figs. 2A, 2B) until the pulses generated by the slide are equal to the number stored in the external data register. A stop signal is issued by the register which energizes a solenoid 204. The armature moves to the left slide, locking it in its set position. The slide 24 now assumes its complementary positions. In the next part of the machine cycle the various members special to electrical data entry are reset and thereafter the slides are available for a normal machine cycle. If the external register is storing "O" in any order the associated solenoid 204 is energized immediately and the arm 194 although not engaging a recess in the surface of slide 22 wedges the slide against any movement. When the link 130 is subsequently moved the arm 118 immediately engages the rack 22d on the accumulator slide permitting the complementary slide to move its maximum distance. Accumulator read-out to external store. The lever 266 is again set to the position of Fig. 6, and one of a set of accumulators 42 to 48 (Fig. 2B) is selected. As described above the complementary slides are prevented from moving by the action of stop arm 118 and in the usual accumulator sensing part of the machine cycle only the accumulator slides 22 move. The accumulator wheels each have an enlarged "O" tooth such as 174 (Fig. 2B) and this strikes a depending limb 168a of slide 144 to move it to the left. As in the read-in operation the effect of this movement is to permit arm 118 to release the complementary slides and lock the accumulator slides. The tooth 174 performs the function of solenoid 204 and arm 194. While the accumulator slides move pulses are generated which are stored in the external register. A normal total or sub-total operation is then completed. Specification 951,774 also is referred to.