Patent GB-487494-A (GB)
Abstract: 487,494. Calculating - machines. TRIGGS, W. W. (Underwood Elliott Fisher Co.) Nov. 17, 1936, No. 31423. [Class 106 (i)] In a calculating-machine having two totalizers which may both be used in adding operations, if the machine be operated through a blank cycle with no item key depressed the machine is conditioned for total taking and if the machine be then given a second cycle a total is taken from a predetermined. one of the totalizers, a total being taken from the other totalizer during the second cycle if a key be depressed after the blank cycle and before the second cycle. The depression of a numeral key projects a corresponding stop 42, Figs. 1, 2, and causes a frame 47 to move one step to the right, Fig. 2. The frame 47 carries rods 46 connected to the type bars 3 and to the actuating racks 71, 72. The totalizers 73, 74 are engaged with the racks 71, 72 respectively by links 76, 77 operated by links 80, 81 actuated by a horizontally reciprocated slide 84 having pins 83 and carrying a verticallyadjustable slide 85. The slide 84 is reciprocated in adding timing or in total-taking timing by means not shown. Automatic conditioning for addition in both totalizers. When any numeral key is depressed a lever 57, Fig. 2, is swung clockwise. This pushes rearwardly a plate 48 to block those rods 46 to the left of the highest set numeral. The plate 48 is connected by a link 49 to a lever 50, Fig. 1, which is thus rocked about a pivot 51 against the tension of a spring 52 to condition the machine (by means of mechanism not shown) for addition. This mechanism is retained in adding position against the action of the spring 52 by a plate 53, Fig. 3, pivoted about a vertical axis through pins 54 and engaging between the member 57 and the end 56 of the plate 48. The plate 53 is controlled by a spring detent 60. The slide 85 is normally in its upper position in which the link 80 is coupled to the slide 84 and the upper totalizer is engaged with the rack 71 in adding timing. The lower totalizer is controlled for engagement with its rack 72 for addition by a blocking member 93 inserted between a pin 83 on the slide 84, and a pin 94 on the link 81, thus coupling the link to the slide. The member 93 is operated by a pin 112, Fig. 5, on a plate 19 rocked anticlockwise by the main operating mechanism. The pin lowers a link 105 to rock a shaft 97 having an arm 96 carrying the blocking member 93. The blocking member is locked in inoperative position by means described below if no item is set, the lower totalizer thus being disabled.. Spacing cycle. At the end of an adding operation, the plate 48 remains in its rear position over the rods 46 and the machine remains conditioned for an addition timing movement of the slide 84. Since the frame 47, Fig. 1, is in its normal position, a projection 69 thereon lifts a lever 68, Fig. 3, on the plate 53. During the spacing stroke, a member 67 on the main operating mechanism engages the now-lifted lever 68 to push the plate 53 forward away from the detent 60. The plate 48 is thus moved forward to the Fig. 2 position and the operating mechanism is set for total taking by the spring 52. Taking total from upper totalizer. This occurs automatically if the machine be again operated. after a, spacing cycle. The blocking member 93 is not lifted to engage the lower totalizer because the link 105, Fig. 5, is latched in its upper position by a latch 123, released only when an item is set, this setting causing a roller 136 to move to the left by means not shown, a lever 130 then being rocked anticlockwise by a spring 132 to release the latch 123 through a rod 126. Taking total from lower totalizer. This occurs when the machine is operated after a key 138 has been depressed, a spacing stroke being necessary if the previous operation entered an item, this stroke conditioning the machine as described above to cause the slide 84 to move in total-taking timing. The key 138 rocks anticlockwise a lever 141 connected by a link 144 to a lever 88 which lowers the slide 85. The upper totalizer is then disengaged by the spring 84a and the upper pin 83 moves idly in the slot 82 while the cam part 87 of the slide 85 acts on the end of the lower link 81 so that this link is coupled to the slide 84. The lever 141 is latched by a latch 150 rocked to release the lever at the end of an operation. A projection 148 on the lever 141 engages a pin 149 on the key 138 to lock this key down. Interlocks. (a) The depression of the key 138 controlling the taking of a total from the lower totalizer moves a plate 159 to the left to block all the numeral keys. (b) When the lever 50 is rocked. into its adding position by the setting of an item, a rod 155, 156 moves beneath a projection 158 on the key 138 to lock this key against depression. Specification 351,007 is referred to.