Patent GB-612392-A (GB)
Title: Improvements in or relating to accounting machines and similar calculating machines
IPC: B41J3/00
Filed: 1946-05-24
Abstract: 612,392. Typewriters &c. NATIONAL CASH REGISTER CO. May 24,1946, No. 15849. 'Convention date, Oct. 9, 1942. [Class 100(iv)] [Also in Group XIX] In a calculating machine comprising two type carriers each associated with a respective column of keys through a respective actuator, connections are provided between the actuators so that each type carrier can be set under the joint control of both actuators. The type carriers can also be set through the actuators from a totalizer, the arrangement being such that printing is effected in a scale of notation different from that used in the totalizer. The invention is described embodied in a machine of the type disclosed in Specification 28253/08, [Class 100], but adapted for Indian currency. The two columns of keys provided by the invention are used for entering Annas, the first column 77, Fig. 3, for entering 1-7 and the second column 78, Fig. 8, for entering 8-15. The Annas totalizer comprises two wheels connected by transfer mechanism, the lower wheel having 16 teeth and two transfer cams and being moved 1-7 steps at each operation, the higher wheel having 20 teeth and ten transfer cams, each step of movement of this higher wheel representing eight Annas. The depression of any of the 1-7 Annas keys 77, Fig. 3, controls the differential movement of a lower actuating rack 90 which drives the lower Annas totalizer wheel 153. The depression of any of the 8-15 Annas keys 78 releases the zero latch 121, Fig. 8, of a higher actuating rack 120 which later moves one step to drive the higher Annas wheel 156 one step (representing 8 Annas). The 9-15 Annas keys have lugs which lie over the lugs on the 1-7 Annas keys respectively. The depression of, e.g. the 10 Annas key thus' allows the actuating rack 120 to move one step to enter 8 into the higher Annas wheel and also depresses the 2 Annas key to allow the actuating rack 90 to move two steps to add 2 into the lower Annas wheel. Setting type segments from totalizer wheels. Two type segments 172, 173, Figs. 3, 8, are provided for the Annas denomination, the former printing units and the latter tens. The units segment 172 is connected by a link 176 to a setting lever 177, 178 engaged by a pin 180 on a crank 181 pivoted at 182 to a lever 102 which drives the lower actuating rack 90 controlled by the 1-7 keys 77. A second pin 183 on the crank 181 rides in a slot 184 of a modifying lever 185. When 1-7 Annas are being entered, the slot 184 is concentric with the pivot 61 of the setting lever 177, 178 and the driving lever 102, the crank 181 then moving as if integral with the driving lever 102 to move the setting lever and thus the units type segments 172 counterclockwise 1-7 steps. If the 8 Annas key 78 is depressed, the higher rack 120 moves one step to the right. A pin 211 on this rack rocks counter-clockwise a lever 212 which turns the modifying.lever 185 and thus the crank 181 clockwise to swing the setting lever 178 and the units type segment 172 two steps clockwise to bring the type " 8 " to the printing line. Depression of the 9 Annas key controls the higher rack 120 for one step of movement to swing the setting lever 178 two steps clockwise and also controls the lower rack 90 for one step to turn the said setting lever one step counterclockwise, the setting lever and units type segment 172 in the result moving one step clockwise to position the type '' 9" " for printing. Depression of any of the 10-15 Annas keys 78, e.g. key 13, similarly causes the units type segment 172 to turn two steps clockwise and the key number less 8, e.g., 13-8 = 5, steps counter-clockwise to position the units digit of the corresponding Annas item at the printing line. The tens printing segment 173. Fig. 8, is moved two steps counter-clockwise to bring the " 1 " type to the printing line when any of the keys 10-15 has been depressed, this segment being linked to a setting lever 243 operated by a pin 252 on a crank 248 pivoted an a plate 250 fixed to the lever 132 which operates the higher actuating rack 120. The lever 132 turns the setting lever one step only. The additional step necessary to make the " 1 " type active occurs when the lower actuating rack 90 moves right two or more steps consequent upon the depression of one of the 10-15 Annas keys. A cam 259 on the 'rack 90 is then moved to allow the rocking levers 257, 255 which in turn permit the crank 248 to swing to give another step of movement to the type sector. Impression mechanism. Controlling zero printing. When the units setting lever 177, 178, Fig. 3, rocks it disengages a zero latch 197. from a driving arm 190 so that, when a second latch 196 is disengaged from the said arm 190 by the contact with 'the latch 196 of an arm 206 on the printer shaft, a spring-driven actuating pawl 191 rocks the driving arm 190 to impel, through a connection 194, the type segment 172 towards the platen 170. To disengage the latch 197 when 10 Annas'is to be printed, the tens setting lever 243; Fig. 8, operates a latch 230 which through a lug 231, Fig. 3, releases the zero latch 197. Specification 420,807, [Group XIX], also is referred to.