Patent GB-149287-A (GB)
Title: Improvements in and relating to printing mechanism for calculating apparatus, machines for automatically compiling, recording, and reckoning statistics, and like machines
IPC: G06C25/00
Filed: 1919-05-01
Abstract: 149,287. Lasker, W. W. May 1, 1918, [Convention date]. Type-wheel machines ; platen-impression arrangements.-Relates to printing-mechanism for calculating- apparatus, machines for compiling statistics, and like machines, of the kind in which impression is effected by a reciprocating paper-carriage. (1) Type-sectors 618, Fig. 15, which may be associated with the setting- mechanism described in Specification 149,286 are provided with numeral types 630 and zero types 634, Figs. 15 and 18. The zero types are secured to supports 1038 pivoted on pins 1039 on the type-sectors and connected to springs 1040, which normally hold the zero types out of printing position. The zero type normally engages a recess 1048 in a bracket 1046, which is mounted on the pin 1039 and is provided with rollers 1054, 1051 adapted to engage a cam 1055 and a lug 1052 on the type-segment and bracket of the next higher denomination. Movement of the type-sector, through the roller 1054, moves the zero type of the next lower order into printing position, and the positioned zero type, by means of the lug 1052, moves into printing position the zero types to the right if the type-sectors have not been set to a numeral position. To permit of splitting the record into columns, the zero type of any sector can be moved to engage a recess 1049 in the bracket 1046, the roller 1054 and the pin 1051 being thereby held out of engagement with the cam 1055 and the lug 1052. (2) The paper-carriage 1110, Figs. 2 and 3, is mounted on a reciprocating frame comprising end plates 1105 guided by slots 1104 in standards 1101, and provided with rollers 1106 running in slots 1107 in standards 532. The frame is reciprocated by a lever 1137 normally coupled to a lever 1138 engaging a cam 1141 on the cam-shaft 531. The coupling consists of a cone 1154 engaging openings 1148, 1149 in the levers. When it is not required to print items, a hand-lever 1160, Fig. 3, coupled by a link 1158 to a lever 1155 engaging a pin on a rod 1150 carrying the cone, is moved to permit of a spring 1151 withdrawing the cones, the lever 1137 being thereby silenced. A notched plate is provided for locking the hand-lever in printing or non-printing position. When the hand-lever is in non-printing position, the impression mechanism is automatically rendered operative for printing totals by means of a lever 1387, Fig. 3, which engages a pin 1391 on the rod 1150 and a notch 1390 in a bar 1124. The bar forms part of column printing- mechanism, described below, and is automatically shifted to the left when totals are to be printed, the lever 1387 thereupon moving the rod 1150 and causing the lever 1137 to be coupled. Types, securing on carriers.-The numeral types 630, Fig. 15, are riveted to the sides of arcuate rims on the type-sectors 618 and formed with lugs engaging inner and outer notches in the type-sectors. One or more of the type sectors are provided with an arcuate plate bearing types for printing a decimal mark or point. Paper-supports; strip feeding and clamping arrangements.-The paper-carriage 1110, Figs. 2 and 3, consists of end plates 117 connected by rods 1129, 1113, the rods 1129 being secured to brackets 1118 having openings for engaging a rail 1116. secured bv fins 1115 to a rod 1109 which is secured to arms 1108 on the plates 1105. The carriage is supported at the front by arms 1114 which engage the rod 1113. The platen consists of a number of separate blocks 1258, Fig. 8. of rubber or the like mounted in supports 1257 secured by screws 1256 to brackets 1251. The brackets are spaced on a rod 1252 and are arranged between narrow feedrollers 1248 which are mounted on a shaft 1120. The feed-rollers are separated by sleeves 1250 which pass through the brackets, and the feedrollers and sleeves are caused to turn as a unit by means of a clamping-screw on the shaft. The feed-rollers 1248 co-operate with feed-rollers 1288, Fig. 7, which are mounted on arms 1287 on shafts 1286, and are held in contact with the feed-rollers 1248 by springs 1289. A releasing-lever 1298 for the feed-rollers 1288 lifts a pin 1294 engaging extensions 1292 of the arms 1287. In the spaces between the feed-rollers 1248 are arranged upper and lower cylindrical plates 1260, 1261, Fig 8, which surround the brackets 251 and are flush with the feed-rollers 1248. The plates are mounted on the rod 1252, the upper plates being tiltable to afford access to the screws 1256. The upper plates may be omitted. An apron 1267 surrounds the lower plates and the lower part of the feed-rollers 1248, the paper strip 1281 passing over the apron. Ears 1285 for supporting the shafts 1286 are formed on the apron. The apron is formed with extensions 1284 between which the type-wheels pass for impression. A clamping-bar 1333, Fig. 2, travels with the feed-rollers 1248 during the line-spacing movement, and is then raised and returned to its initial position. The bar is secured to arms 1334 having slots 1335 engaging the shaft 1120 and having pin-and-slot connexion 1336 with levers 1338 connected to springs 1339. During the return stroke of the paper-carriage, a cam 1342, rocked by the engagement of a pin 1340 thereon with rod 1310, engages the pin 1336 and thereby causes the clamping-bar to be eased and swung downwards. The feed-rollers 1248 can be rotated to feed the paper, by means of a knob 1305, Fig. 7. geared to a pinion 1329 on the shaft 1120. Line-spacing mechanism.-A pawl 1317, Fig. 2, co-operating with a ratchet-wheel 1301 on the shaft 1120 is operated automatically bv the impression mechanism. The pawl is carried by a lever 1304 connected bv a link 1306 to an arm 1307 on a shaft 1308 having an arm 1309 engaging a rod 1310 which is mounted on rocking arms 1311 on the main framework. During the impression stroke of the paper-carriage, the arm 1309 passes idly over the rod 1310, the arms 1311 yielding and being then returned into contact with a stop by means of a spring 1315. During the return stroke of the paper-carriage, the arm 1309 is rocked and the pawl operates the ratchet-wheel. The feed is varied by means of an adjustable lever 1318 provided with a pin 1320 which co-operates with an incline 1319 on the pawl to determine, the point of engagement of the pawl with the ratchet-wheel. The lever 1318 is resilient and is formed with depressions 1321 for engaging a locking-projection on the plate 1117. Column printing-arrangements.-(1) The papercarriage 1110, Figs. 2 and 3, is manually adjustable on the rail 1116 to permit of printing in one or other of several columns, and is maintained in the adjusted position 'by the engagement of a pin 1127 on the paper-carriage with one or other of a series of holes 1126 in a bar 1124 mounted on the uprights 1108. A locking-plate having, key-hole slots 1131 for engaging the head of the pin is. moved longitudinally to lock the pin. (2) To distinguish totals from items, the paper-carriage is moved to the left before a total is printed. For this purpose the bar 1124 has a pin-and-slot mounting 1122 on the uprights 1108 and is automatically moved to the left by means of a lever 1381 controlled by a lever 785.