Patent GB-542354-A (GB)
Abstract: 542,354. Calculating apparatus. TRIGGS, W. W. (Underwood Elliott Fisher Co.). Jan. 29, 1940, No. 1796. [Class 106 (i)] In a combined typewriting and computing machine provided with a total-taking mechanism adapted to be conditioned for co-operation with the totalizer and a travelling carriage so as to cause the digit type elements to be selected seriation in denominational order, under control of the travelling carriage in a pre-determined zone, to print automatically the total from the totalizer wheels, the conditioning device is ineffective to take a total unless the total taking manipulative member is operated prior to the carriage reaching said zone. In the case of an overdraft, means comprising complemental digittype elements, are provided to print a true negative total and a sub-total may be printed if the sub-total key is depressed prior to the initiation of the operation on depression of the total key. Means are also provided to transmit the total to another totalizer during the same operation, to skip-tabulate the carriage directly to the total printing zone, and to interlock certain parts of the machine to prevent untimely operation. General operation.-The invention is shown applied to a machine of the Underwood-Hanson type. Depression of a numeral key 30, Fig. 2, rocks a lever 32 and a dog 36 thereon engages a power-driven splined shaft 37 to pull the lever 32 rearwardly and through a linkage 35, 44, 42 swings the numeral type lever 39 to impress a record sheet on a platen 40. At the end of the movement the type lever strikes a universal bar 49 to operate the usual escapement mechanism, the tabulating movement being limited by stop rods 91 co-operating with stops 93 on the usual carriage tappet block 135. Each lever 44 has a depending arm 100 which rocks a corresponding shaft 101, Figs. 2 and 8, to operate a linkage 102, 105, 107 to effect the projecting or setting of a digit pin 103 on the appropriate differential actuating rack 104. The selection of the set of actuating racks for a particular totalizer is under control of the carriage by means of denominationselecting tappets 111, Figs. 2 and 13, and one or more totalizer selecting tappets 123, 123a, on the block 135 which co-operate with the jacks 110 and cam plates 122. The jacks 110 co-operate with rods 112, bell cranks 113 to operate control racks 114, 117 and each cam plate 122 cooperates with a slide 125, bell crank 127 and push rod 129 to raise a bail 120 to connect the rack 114 to the actuating rack 104 which, through the operation of the bell crank 113, receives a slight movement to align the digit pins with the links 102 before the appropriate link is operated. In computing operations a general operator 141 is reciprocated to displace the actuator racks 104 to actuate the pinions 108 of the selected totalizer. The pinions are selectively engaged directly with the racks 104 or indirectly through idler pinions in constant mesh with the racks for addition or subtraction respectively. The movement of the pinions 108 for this purpose is controlled in known manner by a rockable frame 145 and control slide 166. The slide 166 is normally held in a neutral position by latches 170, 173. The latch 170 is connected to the coupling bail 120 and is withdrawn when the bail is operated to set the slide for addition; the latch 173 is freed together with the latch 170 for subtract operations under the control of a subtraction tappet 177, Fig. 5, on the block 135. The rock shaft 17'6, Fig. 2, that controls the latch 173 may be operated manually by connection with the subtract key 185. The parts are restored at the end of the return movement of the general operator. Transfer mechanism.-The carry-over is effected in known manner by imparting an additional step movement to the actuators. During the cycle of operation a crossbar 602 carrying a latch bar 599, Figs. 29 and 34, is moved from one position to the other as shown and displaces stop rods 594 and levers 596. At transfer a tooth 591 on a totalizer wheel rocks a lever 592 to release its stop rod 594 from the latch bar 599 whereupon it is pulled by its spring 610 to rock the lever 596. The lever 596 co-acts with a lever 613 associated with the actuating rack 104 of next higher denomination at the end of the movement to impart an additional step movement thereto. Subsequent transfers are effected by the successive release of the levers 596. In overdraft conditions the "fugitive one" is entered by associating the transfer arm 616a, Fig. 26, of the highest denomination with transfer parts 594a, 596a arranged in the units denomination. Positive total and sub-total taking operations.- Depression of the total key 200, Figs. 2 and 5, raises a stop rod 450 and carriage arresting plate 451, and conditions the control slide 166 for subtraction. The rod 450 displaces a thrust slide 205 to put a cam plate 206 into line with a tappet 208 on the block 135 and frees the carriage escapement so that the carriage advances to the total printing zone: The raised plate 451 arrests the carriage and re-engages the escapement mechanism. During the final step of movement the cam plate 206 is depressed and released from its latch 463. The cam plate acts through a slide 210 and push rod 211 to rock shaft 213 and release a latch arm 214 from an arm on a rock Shaft 216. The shaft 216, under spring action, displaces a connecting rod 219 and frame 220 with cross bar 221, Figs. 5 and 18, to permit feelers 222 to assume total reading positions by engaging slots 225 formed in discs 227 secured to the pinions of the selected totalizer. Each feeler carries a pivoted type selector 230 which cooperates with one of a set of digit blades 231 to select the corresponding numeral type member. Associated with each feeler is an interponent plate 233 with a tongue 243 which is lowered to connect the feeler to the corresponding actuating rack 104. A slotted disc 476 coupled to the highest denominational wheel co-acts with an ultradenominational feeler 465 and interponent 467, Fig. 13, which co-operates with a bar 468 that can be coupled to its control rack 117 by a coupler 469, similar to the bail 120, operated by a connection 471, 474, with the shaft 216. The slight forward movement of the bar 468 by the carriage tappet action will, with the disc 476 in zero position, raise the interponent 467 and therewith the selector 466 to operate the "0" lever 266 which rocks a draw link 272 and, through a cam lever 480 and associated linkage, operates the escapement mechanism. The escapement mechanism operates for each denomination standing at zero beyond the highest significant figure, account being taken of punctuation spaces to step the carriage accordingly. In the position of the first or highest significant figure, the slight movement of the rack 104 rases the interponent 233, the selector 230 and blade 231 to cause the digit lever 265 to rock the draw link 32 to actuate the appropriate type lever. Operation of a digit type action results in a shifting of the connection of the " 0 " digit blade 231 from the spacing draw link 272 to the draw link 32 for the " 0 " type action. For this purpose the first digit lever 35 actuated displaces a slide 310, Fig. 8, by engaging one of its cam projections 309 and moves the rock shaft 271 longitudinally to displace the arms 273, 312 to render the draw link 272 ineffective and the draw link 32 effective. The type actions at the same time set corresponding digit pins 103 in the rack bars 104. At the carriage step after the last digit has been printed an extension 93a on the column stop 93, Fig. 5, rocks the usual trip lever 323 and connects the general operator 141 to a power drive (not shown) for a cycle of operation. This action withdraws the total reading feelers 222, 465 and raises the interponent plates 233, 467 disengaging them from the actuating racks 104 while the totalizer wheels are shifted rearwardly into engagement with the idler gears 144 and the shaft 216 is restored and held by the latch 214. In this cycle the totalizer is cleared and the other parts are restored to normal. For sub-totals a sub-total key 352 as well as the total key 200 must be depressed. The operation of the sub-total key serves to move the control slide 166 to a neutral position and thus prevents engagement of the totalizer wheels during the cycle of operation. The amounts accumulated on the selected totalizer may be transmitted to another totalizer by providing an additional tappet 123a on the tappet block. In total taking operations spring pressed detents 228 Fig. 18, are arranged to enter a deep recess at the " 0 " position of the totalizer wheels to permit the operation of a clear sign mechanism in known manner. Overdraft or true negative totals.-When the totalizer wheels are in an overdraft condition and the total key 200 is depressed the feeler 465 is moved to an extent, by engagement with a slot in the disc 476 at the " 9 " position, to position the selector 466 under a blade 500, Figs. 9, 11 and 13, similar to the blades 231. Operation of the blade 500 rocks a lever 508 to place the draw link 502 under the influence of the power shaft 37 which pulls the link and through a linkage 509 rocks the case-shift lever 510 to swing the frame 515 and raise the platen 40 to the uppercase position. A cam arm 530 holds the lever 510 in depressed position. At the same time a yoke 507 of the linkage 509 works against the tongue, of a coupling bar 543, pin and slot connected to the operating lever 44 of the "9-0" type action, so as to withdraw its coupling pin 544 from a slot in the lever 42 and thereby disconnect the type lever 39. This action also shifts the slide 310 to render the draw link 32 effective, the forward movement of the coupler bar 543, through a linkage 555 rocks the draw link 32 to cause a carriage shift without printing. In the position of the highest denomination the feeler 22