Patent GB-193850-A (GB)
Abstract: 193,850. National Cash Register Co., (Assignees of Shipley, B. M.). March 11, 1921, [Convention date]. Printing-mechanism; voucher-issuing. - A voucher may or may not be issued by the machine and, if issued, may or may not have a perforated line across it for counterfoil purposes, the control of these alternatives being effected by means of two setting knobs 1146, 1184, Fig. 2. In normal operations, however, if a clerk's key has been depressed, a voucher is automatically issued irrespective of the setting of the knob 1184, but by means of a special key 1222 this automatic control may be prevented. The invention is described in connection with the mechanism set forth in Specification 176,781. Voucher-feed. The voucher-strip passes from a roll 1008, Fig. 13, through a channel 1011 and two pairs of electros and impression rollers 1014, 1015 to the perforating and severing mechanism and thence to the printing and ejecting elements. The strip is fed by the rotation of the electros through intermediate gear wheels and a Geneva driving mechanism operated by two spaced pins on a disc 978, Fig. 3, on shaft 651. These pins produce two feeding movements of the strip to enable it to receive two imprints of the item, one on each half of the voucher, Fig. 23. Voucher, perforating and severing. A serrated perforating plate 1076, Fig. 13, and a knife 1072 are slidablv mounted in a unitary structure and are reciprocated bv a pair of double arms fixed to a shaft 1070 adapted to be rocked by cam mechanism, Fig. 7, from shaft 651 through a lever 1080. The cam mechanism comprises two cam discs 1086, 1088 mounted to rotate with the shaft and operating respectively the two arms 1082, 1083 secured to lever 1080. The cam disc 1086 can be slid along the shaft into a recess in the cam 1088 so as to be out of the plane of the roller 1085 on arm 1082, and thus no longer to effect reciprocation in one direction of the shaft 1070, perforation of the strip consequently not occurring. Voucher, ejecting. At either end of the printihg line are arranged two pairs of ejecting discs, one disc of each pair being flattened at opposite ends of a diameter and being rotated through 180‹ by driving mechanism, including pawl-andratchet gear, a connecting link, and a quick cam on the shaft 651. Plain or counterfoil voucher, controlling issueof. The knurled head 1146 has two set positions and when placed for the issue of counterfoil vouchers, the cam disc 1086 is operative as described above for effecting the descent of the perforator upon the voucher. If the head is turned through 90‹ however, this cam disc is slid into the non-functioning position, and the perforator is not lowered, so that a plain voucher is issued. Moreover, the displacement of the cam disc also slides an arm 1066, Fig. 6, bearing a pin 1068 out of the plane of the Geneva wheel 973 operating the printing platen 886, Fig. 13, thus preventing the second impression of the item upon the voucher. Detent means to hold the knob 1146 in either of its set positions are provided, and an interlock with the motor-releasing shaft 88, Fig. 2, prevents operation of the machine unless the knob has been correctly set. This interlock comprises a slidable bolt 1170, Fig. 2, connected by a link 1171, cam slot 1175 on a lever 1176 and link 1178 with the lever 87 fixed on the release shaft 88. When this shaft is turned to start the motor, the bolt is moved to the right, but if the knob 1146 has not been correctly positioned, a pivoted sector 1167 connected by gearing with the knob, stands in line with and so blocks the path of the bolt and prevents release of the machine. Voucher-issue, controlling manually. If it is desired to prevent the printing and issuing of a voucher, a second knurled head 1184 is turned. This displaces an arm 1188, the end of which extends over the edge 1189, Fig. 2, of a lever 1190 connected at 1191 to a pivoted arm 1192 and tending to rotate counterclockwise under the action of a spring 1194. The arm 1188 being thus removed permits the lever to rise, and in its subsequent reciprocation by the pitman 1195 to seize a pin 1202 on a shaft 907 and thus slide it to the right. This movement, through a fork 1208, displaces the pin and cam discs, Fig. 3, driving the Geneva mechanisms for feeding, impressing, perforating and severing the voucher, strip so that these drives are disabled and no voucher is issued. An interlock between the knob 1184 and the motor-release shaft 88 is provided, and consists of a second sector 1213 pivoted alongside the sector 1167 referred to above and co-operating in the same manner with the slidable bolt 1170. Voucher - issue, controlling automatically. Whenever a clerk's key is depressed, a voucher is automatically issued, no matter in what positions the knobs 1146, 1184 are set. This is effected by means of an arm 1218 adapted to co-operate with a portion 1219 of the lever 1190 and controlled by the rack positioned differentially according to the clerk's key depressed. The clerk's bank contains a " list " key, and when the rack is positioned under the control of this key, a depression in the rack allows the arm 1218 to rock so as not to interfere with the lever 1190. Otherwise the arm is maintained by the rack in lowered position so as to prevent the lever 1190 from rising and seizing the pin 1202 to disable the voucher-issuing &c. mechanism. Voucher-issue automatic control, disabling. When the special key 1222, Fig. 2, is depressed, the control by the clerk's rack is rendered abortive. The depression of the key raises a pin 1226 in the V slot 1227 formed in a lever 1228 pivoted at 1229 and provided with a pin 1230 engaging a slot in a link 1232 pivoted at 1233 to a lever 1234 lying alongside lever 1190 and, like it, pivoted at 1191. Under the action of a spring 1235, the link 1232 now moves upwards and causes the lever 1234 to seize the pin 1202. In the subsequent operation of the machine therefore, the shaft 907 is shifted to disconnect the driving-mechanisms for the voucher-issuing &c. parts so that the voucher is not issued in spite of a clerk's key having been depressed. The special key 1222 is held down by a spring-controlled pawl 1236 subsequently displaced to free the key by a pin 1240 on the lever 87 rocked clockwise at the end of the operation of the machine. Moreover, in order to prevent depression of the key after operation has begun and to prevent operation unless the key is either up or right down, a projection 1246 of the key cooperates with the foot 1245 of a slide 1244 reciprocated through a cam slot by a pin 1248 on the lever 87.