254,761. British Tabulating Machine Co., Ltd., and Campbell, C., (Tabulating Machine Co.). Feb. 4, 1825. Statistical machines ; printing totals.-A statistical machine, embodying " automatic control " for cards arranged in groups, comprises in combination two control-perforation reading devices for comparing the control holes of main groups and sub-groups in successive cards, card-reading mechanism for item-reading, two separate counters for the main-group reading device and for the sub-group-reading device, an operative connection between the item-reading mechanism and the counters irrespective of the groups, and totalprinting means connected to the two counters so that a total is printed off the sub-group counter or off both main-group and sub-group counters according as the sub-group and main-group reading device respectively detects a change in the control perforations. The " 9 " perforation index-points of the cards pass the reading brushes first. Clutches, claw; main drive operating-clutches. The motor 62, Fig. 1, rotates a shaft 65, Fig. 17, which constantly drives a control-unit shaft 67 and which has pinned to its upper end a bevel-wheel 68 rigid with a notched disc 71 coacting with a lug 73, Fig. 15, on a clutch dog 71 which is pivoted to a double-armed member 70 keyed to a sleeve 69 surrounding the shaft 65. To drive this sleeve a clutch magnet 74, Figs. 10 and 15, is energized, the device constituting a positive-stop clutch. Keyed to the lower end of the sleeve 69 is a cup-shaped member 84 having a ratchet notch 84<a>,and within this member and keyed to the shaft 65 is a collar 85 with a shoulder 85<a> notched at 86, Fig. 18. A bolt 87 slides in a disc 91 loose on shaft 65 and extends downwards into a hole in a skew gear 88 also loose on shaft 65. This bolt 87 has a notch which fits the shoulder 85<a> when the upper end of the bolt engages the lower un-notched edge of the member 84. As the latter rotates, the ratchet notch 84a is brought into register with the bolt 87 and this also registering with the notch 86 in the collar 85, rises clutching the gear 88 to the shaft 65. This coupling only occurs when the sleeve 69 rotates, and if the latter stops the bolt 87 rides out of the notch 84a and disengages from the collar 85. The gear 88 drives a shaft 93, Fig. 10, which on energization of a card-feed clutch-magnet 95, Fig. 17, is clutched to a shaft 100. Card-feeding mechanism. The cards 104, Figs. 3 and 4, are fed into the bite of rollers 106 by members 107, which are pivoted at their lower ends and reciprocated by eccentrics from the gearing driving the rollers 106. These fingers grip the under-surface of the bottom card, after which a pusher member 109 contacts with the rear edge of the card to feed it through a throat 108 which has serrated edges. The rollers 106 feed the cards on to a drum 103, driven from the shaft 100. from which the cards pass to a discharge magazine 116. The cards are held on to the drum by grippers 111 which are opened at the correct time by cams 113, 114 and closed on to the card edge by springs 112. According as the cards are held correctly by the grippers contacts 117 - - 121 Fig. 37 are operated. If no card is so held the inner end of a gripper engages a notch 130, Fig. 7, in a member 128, 129 and projects a member 128b from the drum, which member strikes a lever 126 and permits a link 123 to move downwards and rock a bail-lever 122 clockwise. If a card is held by the gripper a second member 128a is projected and strips a lever 124 which raises the link 123. The discharge stock is supported by a spring 151 having at its lower end a cross-bar which closes contacts 156, Fig. 37, to stop the machine when it is in its lowest position with the magazine full. Reading brushes. The upper and lower brushes 144, 145, Fig. 3, are carried on a movable frame 142 and coact with brushes 147 on fixed bars 146. This frame is pivoted at 141a to arms 141 pivoted on studs 140, so that on depression of a key 150, fixed to one of the arms 141, the brush-holder frame is rocked outwards for inspection. To prevent the card-grippers from damaging the reading-brushes the inserted bars 143 of the latter have rigid with them arms which coact with a cam rigid with the drum 103, whereby the brushes are raised as the grippers pass under them. Electric type-wheel actions; strip and like record-controlled driving mechanism. The bevel wheel 68 drives the shaft 161, Fig. 11, of the printing drum which is constructed with typelevers 162 as in Specification 204,676. To operate these type-levers at item-printing magnets 165, Fig. 37a, are energized and elevate wires 166, Fig. 22; any raised wire 166 rocks a pawl 167 pivoted to a plate 168 into engagement with a ratchet-wheel 172 which thereupon raises the plate 168 about its pivot 169. This plate carries, with a triangular friction spring interposed, a plate 174 having a shoulder which in rising rocks the lever 163 to elevate the appropriate type-lever 162. Immediately afterwards the plate 174 is displaced counter-clockwise by a ratchet shaft 175, and subsequently the plate 168 is rocked clockwise by a restoring bail 176. These plates 168 also raise wires 240 controlling the operation of the counter wheels. The means for operating the counters, for resetting them to zero, and for printing a total therefrom are as described in Specification 255,006. Total-clutch mechanism. The drum shaft 161, Fig. 12, drives a total-taking and resetting shaft 315 and also drives through a clutch, when the total-clutch magnet 323 is energized at total-taking, a shaft 236 Directly below this magnet 323 are a grand-total controlling-magnet 908 and a grand-total pre-selecting magnet 903. When the armature 326 of the magnet 908 is raised against its spring 920 it raises a clutch sleeve 327 on the resetting shaft 315 so that the latter drives through skew-gearing a main-group counter cam 329. When the armature 326 moves down on de-energization of magnet 908 a clutch 330 is engaged to drive the sub-group-counter cam shaft 331. These shafts 329 and 331 carry the cams operating the counter-engaging mechanism. The armature 905 of the magnet 903 controls a clutch member 940 splined to a vertical shaft 941 driven through wheels 942, 952, and 962 from the shaft 315, the gear ratio being 1 : 1. Co-acting with the member 940 are wheels 943 and 944 which are free on the shaft 941 and drive a shaft 950 in the ratio of 1 : 1 and 2 : 1 respectively according as the magnet 903 is de-energized or energized respectively. A cam 950<a> on shaft 950 momentarily closes normally open contacts 478, Fig. 37, and just before the end of the rotation of shaft 331 a cam 909 thereon closes contacts 910. Distinguishing-marks. Provision is made for printing characters such as GT and T to distinguish grand-total from sub-total printing. For this, a special hook 163a of the hooks 163, Fig. 23, coacts with two type-bars 162, and a drum which carries the type T and an additional character G. This hook 163<a> is controlled by a cam 189a which is splined to a, shaft 190 and has two notches 395 and 396, one or other of which, according to the axial position of the cam, coacts with the hook 163<a> to print the character T signifying a printing from the sub-total counter, or both characters GT denoting a printing from the grand-total counter. The cam 189<a> is slid a different amount on its shaft through linkage from a bell-crank 402, Fig. 12, which is operated from the armature of the grand-total magnet 908 according as the latter is energized or not. Line-spacing mechanism. A link 410, Fig. 12, operated at listing from the shaft 282 and normally drawn to the right by a. spring 411, has pivoted to it a pawl 412 which coacts with a pin on a lever 413 which, on being rocked, feeds the paper and ribbon through links 414 and 415 respectively. When the handle 226 is depressed to suppress printing a lever 416 is swung to disengage the pawl 412 and lever 413. During totaltaking a plate 179 is rocked counter-clockwise by a cam on the shaft 236, the plate being pin-andslot connected to a link 417 which is connected to the link 413 to effect the feeding. During listing and adding the plate 179 is rocked clockwise from cam 181. Circuit diagrams. Upon energization aud deenergization of starting magnets B, C, E, or G, cams B431, C431, E431, or G431, Fig. 37, are driven from the control unit shaft 67, these cams controlling contacts as shown. The closure of starting key 443 permits current to flow through starting magnet B. junction 444, and contacts 445. The spring 920. Fig. 12, will have relowered the armature 326 and clutched together the sleeves 327 and 330 driving shaft 331, so that further operation clears the sub-total counter. To clear the grand-total counter a key 446 is closed before the starting key 443. The operation of magnet B rotates the cam devices B431, closing contacts 447 to energize the total-clutch magnet 323 which causes shaft 236 to rotate once while the printing drum makes two revolutions. During the second half revolution of shaft 236 the counters are cleared, totals are printed, and contacts 449 close. This energizes the clutch magnet 74 which couples shaft 65, Fig. 17, through gear 68 with sleeve 69 and shaft 93, Fig. 10. This clears the counters and effects the total-taking, since the sleeve 69, Fig. 10, drives the shafts 249, 250, which themselves drive the counters. Contacts 451 next close to energize the card-feed clutch-magnet 95, clutching the shaft 93 to the shaft 100 driving the card drum. Subsequently to maintain the machine running until the first card reaches the drum, contacts 453 and 455 close, the latter providing a holding circuit through normally closed contacts 456 and armature 460 of magnet 95. For non-automatic control a switch 461 is moved to its upper position 462, Fig. 37, and a second holding circuit for the magnet