Patent GB-249204-A (GB)
Title: Improvements in and relating to statistical, calculating and like machines operated by mechanical records
Filed: 1924-12-17
Abstract: 249,204. Last, J., and Accounting & Tabulating Corporation of Great Britain, Ltd. Dec. 17, 1924. Statistical machines; printing totals. - The cards are fed through the machine in groups, and when the group control hole changes the machine is speeded up and performs two cycles in the time normally occupied by one; during the first of these cycles totalling occurs and during the second adding &c. is performed for the first card of the new group. The type sectors 1 reserved for the control perforations in a machine as described in Specification 26896/13 are mounted upon a shaft 7f and have extensions. 2 on which are pivoted pawls 3 having two teeth 4, 5 and coacting with a toothed bar 6 which is common to all the pawl and is mounted on a plate 7 pivoted at 7f. A retractor rod 8 upon side plates 9 pivoted at 7f is operated by a link 7<v> and a crank sector 31 on a shaft 3A rocked once per cycle. Each pawl 3 is actuated by a spring 12 and carries a toothed link 14 co-acting with a tooth 16 on a lever 15. When the rod 8 leaves the tooth 5 and slides along the cam surface 19 the tooth 4 is raised to engage the bar 6. The bar 6 and link 14 have the same number of teeth as the sector 1. Attached to the lower ends of the plates 7 are extensions 20 carrying a a common bar 21 which is held down by a lever 22 and by the top end of a lever 25, pivoted at 24 and having a lower projection 27 engaged by a tooth 28, 28<1> on a spring-controlled cam lever 29 pivoted at 30 and having three cam surfaces 31, 32, 33, above the latter there being a resetting lever 34. Engaging the type sector teeth are adding wheels 8<b> carried by support levers 8<c> pivoted at 38 and having rollers 40 coacting with the cams 31, 32. The pin-box is connected to the cam lever 29 through links 46, 48 and pin and slot 50, 49. At the upper end of a lever 10 pivoted to the plate 9 is a slot 51 coacting with a pin 52 on a cam 53 which co-aperates with a pin 55 on the lever 15. Also pivoted on the shaft 17 is an arm 56 with a pin 57 engaging in a slot 58 on a spring- controlled link 59 which may be locked by a lever 60. When the movable head 63 of the machine rises a lug 69 thereon rotates a bell crank 68 to project a plunger 62 and to rotate the lever 10 clockwise. Lever 60 is also connected by a link 70 to an extension 71 of the transfer lever 8<d>. There are two arms 76, 82 on the shaft 3A, Fig. 4, actuated by arms 80, 79, cam 77, and by arms 84, 83, cam 81 respectively, so that if the shaft 3A be clutched to the arm 76 it rotates at the normal speed for adding &c., but if it be clutched to arm 82 it rotates twice as fast for totalling &c., the clutch 85 being connected bv links 86, 88, 89, 90 to the lever 25. The total key T on shaft 3A is joined by link 8H to a cam link 8E connected to the adding wheel supporting-lever 8C and operated at totalling as in Specification 26896/13, (Figs. 12 and 12a), an additional slot 91 and crank -pin 92 being provided underneath the link 8E for locking the adding wheels in disengaged position during the second half of the double total-taking cycle. At total-taking the lever 25 swings two levers 98, Fig. 2, to position slides 100 between lugs 101 on the movable head of the machine and rollers 102 on arms 95 pivoted at 97 to the fixed base, the rollers 102 and arms 95 being raised by levers 96, 94 and cams 93. Simultaneously, the total key T on the movable head is depressed to initiate totaling by a U-shaped frame 103 on the base. The machine operates as follows : when the pin-box 45 is raised to sense the first card of a group the usual stop rod 72 is raised, and the sectors 1, being released by the retractor rod 8 and the link 7v as the shaft 3A rotates, swing forward under the action of their springs 12 until their sector stops 7k are arrested by the rods 72. The rod 8 continues to move, wipes over the cam surface 19, and raises the tooth 4 into engagement with the bar 6. Further movement of the link 7v pulls down the link 10, lowering the cam 53 and releasing the arm 15 so that its tooth 16 engages the toothed link 14 and locks the bar 6 to the sectors 1. When a card with a different control perforation is read (e.g. the first card of a new group) a different stop rod 72 is raised in front of or behind the sector stop 7k, allowing the sector 1 to swing further out. This swings the bar 6 over against its stop 7<1>, thereby rocking the lever 25 and initiating totalling, the pin box, through linkage 45<1>, 41, 44 raising the lever 22 to release the common bar 21. The movement of the lever 25 performs the following operations; (1) it releases the cam lever 29, which rotates clockwise, the cam 31 and roller 40 disengage the adding wheels 8b, and immediately afterwards the cam 32 re-engages the wheels with the sectors. Between this disengagement and re-engagement the cam 33 rotates the lever 34 to reset to zero those sectors which occupy a position transfer. (2) The shaft 3A is declutched from arm 76 and clutched to arm 82, speeding up the machine as above described. (3) The slides 100 are interposed, Fig. 2, to raise the head of the machine for three purposes, (a) to operate the total key T, (b) to raise the sectors stops 7k clear of the stop fingers 72, and (c) to advance the plunger 62 to operate the lever 10. On return of the retractor rod 8 the cam 53 is raised, unlocking the sectors 1, which are then zeroized at the end of the first half of the speeded-up double cycle.