Patent GB-838252-A (GB)
Abstract: 838,252. Calculating-apparatus. ADLERWERKE VORM. H. KLEYER A.G. Jan. 29, 1958 [July 27, 1957], No. 3013/58. Class 106 (1). In a calculating typewriter having one or more totalizers movable on guides at the front of the machine in the direction of movement of the paper carriage through several denominational positions corresponding to a column, the movement is effected by members carried at the back of the paper carriage acting through a transmission member extending from the back to the front of the machine. The machine described has two totalizers 8a, 8b, Fig. 7, secured to a carriage 36 mounted on rollers at the front of the machine. One or both of these totalizers may be actuated in any columnar position of the paper carriage. Selecting denomination.-When the paper carriage moves into a columnar position containing a control member 10, Fig. 4, having a downward projection 26, the latter engages a pawl 22 carried by a slide 18 and so carries the slide 18 with it as it steps through that column. The end 33 of another pawl 29 also carried by the slide 18 engages behind the control member 10. The slide 18 is coupled by means of a shaft 12 extending forwardly through the machine, a lever 15 and a link 35, to the totalizer carriage 36 which is thus stepped correspondingly. The lever 15 and link 35 are adjustable and enable the steps of the totalizer carriage to be made greater than those of the paper carriage. After the entry of the last digit in the column, the pawl 22 is rocked by a stud 20 and depresses the pawl 29, 33. The totalizer carriage is thus freed for return under the action of a spring. The control members 10 have a portion for engagement by the decimal tabulation mechanism. On depression of a skip-tab key, an arm 175 is lowered and as the carriage moves through one complete column, this arm is engaged by a hook 176 carried by the slide 18 so as to hold the latter in its left-most position until the skip-tab key is released when the carriage has reached the desired columnar position. Actuating-mechanism.-When the totalizer carriage moves from its rest position, a lever 105, Fig. 7, is able to rock counter-clockwise and, through a wire and a lever 112, Fig. 3, lowers a rod 113 into the position shown in Fig. 10, in which it is engaged behind shoulders 119 of drive discs 120. On depression of a number key 67, a corresponding disc 120 is rocked through a wire 121 and consequently the rod 113 and the shaft 114 supporting it are rocked further. This movement rocks an actuating segment 66 about a pin 123 to engage it with a drive-wheel 65 and also unlocks a drive-shaft 63 in known manner. On further movement of the disc 120 by the depressed key, a corresponding cam arm 128 is picked up and this engages a corresponding pin 130 carried by arms 131 fast on the shaft 122 carrying the segment 66 so as to impart a differential movement to the latter. The segment 66 actuates the totalizers through the drive-wheel 65, the drive-shaft 63 and actuating wheels 68, 69. Subtraction.-On depression of a subtraction key 72, Fig. 3, a wire 53 rocks a cam lever 54, Fig. 12, and so moves a rod 60 to the right to shift an intermediate wheel 61 into the position in which it will be engaged by the actuating segment 66. At the same time, a lever 62 is rocked to draw the drive-wheel 65 to the right. The drive-shaft 63 is thus driven through the intermediate wheel 61 instead of directly so that its direction of rotation is reversed. Selecting second totalizer.-On depression of a special control key, a wire 87, Fig. 12, is depressed and a rod 90 is caused to engage a clutch 96, 97 so as to couple the actuating-wheel 69 for the second totalizer 8b to the drive-shaft 63. Non-add.-On depression of a Non-add key, the wire 110, Fig. 3, is held in its upper position and the lever 112 consequently prevents the lowering of the rod 113 into the position in which it is further rocked by depression of a number key to cause the actuating segment 66 to be rocked to effective position. The lever 112 is also blocked so as to non-add the totalizers by an ear 148 secured to the type lever basket 13 when a shift key is operated for the typing of capitals and symbols. Moreover, if a controlmember 10 without a projection 26 is placed on the carriage, the totalizers will not be moved from their rest position in which they remain disengaged from the actuating-wheels. Again, if a known mechanism is set either for normal letter spacing or for double spacing, an arm 201, Fig. 4, rocks a lever 203 which depresses the pawl 22 so that the totalizer carriage will not be moved from its rest position. Only when this known mechanism is set to a central position may calculating take place. Releasing depressed control keys.-The control keys, e.g. 72, Fig. 3, have shoulders which latch against a bar 75 when the keys are depressed. On depression of any tabulation key, a wire 157 is moved to the left and arms on a sleeve 158 press the key stem forwardly so as to unlatch them, whereupon they are restored by springs 74. Carriage control of machine functions.-The wires 53, 87, Fig. 12, for causing subtraction and the engagement of the second totalizer respectively, are secured to levers which through linkages may be rocked by control projections carried by the carriage, one being arranged in each letter position throughout the column in which the selected function is desired.