Patent GB-1290558-A (GB)
IPC: G06C15/04
Filed: 1970-11-06
Abstract: 1290558 Totalizing; transfer RICOH KK 6 Nov 1970 [14 Nov 1969] 52888/70 Headings G4B and G4D A calculating machine includes a totalizer 7 (Fig. 1) having two sets of pinions so that a number set up in a pin-carriage 4 may be added to or subtracted from the total, means normally operable to clear the totalizer 7, print the total and enter the total into a grandtotalizer 14, and means for preventing these operations if the total is negative, the grandtotalizer 14 being provided with only one set of pinions and not adapted to receive negative totals. Totalizing.-Depressing total key 2<SP>1</SP> (Fig. 2) acts through linkage 2A, 15, 16B, 17 (Fig. 3) to move a cam follower 18 to position "T", and acts through linkage 2A, 15, 16, 45 and 47 to move a cam follower 49 to position "T". The two cam followers in positions "T" engage first and second cam systems (not shown) mounted on a shaft 19. During the ensuing cycle, the first cam system rocks follower 18 which acts through links 21, 34 (Fig. 2) to rotate shaft 6 and engage totalizer 7 with racks 8. The racks rise until the totalizer is cleared (when transfer teeth 7A abut pawls 22) and the total is printed by heads 10. Follower 18 then disengages totalizer 7 from racks 8 and follower 49, through links 23, 25 and shaft 26 (Fig. 2) engages totalizer 14 with racks 13 so that on the downward stroke of the racks, the total cleared from 7 is transferred to 14. If the total stored in 7 becomes negative, then a blocking member 67 (Fig. 3) is moved by means not described to the broken line position shown to block link 45 and thus prevent the cycle when the total key is depressed. Grand totalizing.-Depressing grand-total key 2<SP>11</SP> (Fig. 4) acts through slide 51 and lever 47 to move cam-follower 49 to position "GT", where it engages a third cam system (not shown). During the ensuing cycle, a cam 27A (Fig. 4) rocks lever 28 which through portion 28B (see also Fig. 3) shifts link 30 and thus cam follower 18 to position "+" for the first half of the cycle. During the second half of the cycle, 27A disengages from 28 and follower 18 returns to rest. The effect of this is that totalizer 7 and racks 8 do not engage during the "GT" cycle. The third cam system engages totalizer 14 with racks 13 during the up-stroke only of the racks. 14 is cleared and the grand-total printed. Transferring from the grand-totalizer 14 to totalizer 7.-Depressing recall key 2<SP>111</SP>(Fig. 4) moves cam-follower 49 as in the "GT" cycle and also rocks lever 35 anti-clockwise to allow a latch 40 to rook clockwise. During the cycle, the latch 40 acts on link 41 to hold lever 28 and link 30 to ensure that cam follower 18 remains in position "+" for the whole of the cycle. Consequently, the amount cleared from totalizer 14 during the up-stroke of the racks is entered into totalizer 7 during the following downstroke. Printing negative sign.-If the total stored in totalizer 7 is negative and either the grandtotal or the recall key is depressed, then the printing of the negative sign is prevented by means, Fig. 7 (not shown). Preventing errors.-The step-by-step movement of the pin carriage 4 is transferred to the end 30B (Fig. 4) of link 30 so that when a number is set in the pin box, end 30B lies adjacent end 71B of a lever 71 to prevent rooking of the latter and thus prevent depression of the grand-total key 2<SP>11</SP> and the recall key 2<SP>111</SP>. Tens-transfer mechanism.-When a certain order pinion of totalizer 14, Fig. 1, passes through the zero position, a carry tooth 14A trips a lever 32 to shift a link 22 to the right from the position shown. If a certain order pinion of totalizer 7 passes through zero, a carry tooth 7A acts directly on link 22 to effect a similar shift to the right. This shift of link 22 frees a pin 8A to allow the racks of the next highest order to move downwardly through one extra tooth pitch and thus effect the transfer. Miscellaneous.-A counter mechanism, Fig. 5 (not shown), records the number of times a number is entered into totalizer 14. Means, Fig. 6 (not shown), may be selectively set to prevent (a) entry of a number into totalizer 14, (b) withdrawal of a number from totalizer 14, and (c) resetting of the counter mechanism.