Patent GB-190422824-A (GB)
Title: Improvements in Calculating Machines.
Inventor: ENSIGN EMORY SEYMOUR
Filed: 1904-10-22
Granted: 1904-12-15
Abstract: 22,824. Ensign, E. S. Oct. 22. Calculating-apparatus; counting-apparatus. - In keyboard multiplying- machines, the main keys set operating-segments, and the multiplying keys control the revolution by a spring motor of the . totalizing-counter which is operated by the segments as it passes them, the number of revolutions of the counter in the various places of the multiplier being recorded on an indicator which produces an inverted multiplier. The machine can also b e used for addition. The front elevation, Fig. 2, of the machine with the cover removed shows five sets of nine discs each, 86, w'hich are set by the main keys, and the nine levers 112 of the multiplying- keys, the totalizing- counter 65 and the indicators 109. The main discs 86 carry teeth 90, Fig. 4, according to the number of the key, and the teeth of discs of various orders are arranged in succession 171, 172 beginning with the units, whereby the counter registers numbers of different orders in turn, from the lowest upwards. Each disc has slots 165, 161 through which pins 166, 162 pass in such positions that depression of the key 32 throws the teeth into the path of the counter, the front cover being slotted so as to lock the shanks 29, and having a lever attachment whereby it may be moved slightly sideways to allow all the depressed keys to return under the influence of springs and gravity. The discs are confined by side-plates and walls 91, 85 and are normally forced to the right in each set by a spring 93. The spring moter 41 is provided with a winding- knob 42 and through gearing rotates the shaft 44 under the control of the multiplying-keys, the cylinder 46, 47 being keyed to the shaft and capable of sliding along it to the right under the tension of a spring 143 when the spring-held lever 51 is depressed, This lever has a tooth 55 and a ring 56 which engage with the collars 48 so as to limit the movement of the cylinder at each stroke of the lever to the distance between consecutive, corresponding, multiplying - discs, thereby causing operation of the totalizing- counter wheels one order higher. The counter is carried upon arms 57, 58 and a platform 59, and consists of wheels 64, Figs. 5 and 6, with broad teeth 65 and numerals on the spaces 66, the detent springs 69, 70 engaging with the teeth in their lowest position. The teeth of each wheel engage successively with those carried by the discs set, thereby leaving wheels of higher order free for transferring, which is effected by means of a tooth on the recessed edge 82 of one wheel, the gear wheels 89, 79 on the spindle 78, and a toothed ring 77 on the recessed edge of the higher wheels. A milled knob 71 is provided for pressing the counter to the left and rotating the spindle to set the wheels to zero by means of slots and spring-pressed pawls 75, 76. The tooth 63 on the framework of the counter engages with toothed wheels 101 on the indicator and indicates the multiplier by numbers 109 on discs which are seen through apertures 110. The held 95 is provided for returning these discs to zero. The multiplying-levers 112, Fig. 3, rotate about pivots 167 through an arc determined by the length of the slot 121 through which the fixed rod 120 passes, and during the stroke the projection 128 forces the bar 132 backwards until its extremity moves from under the stop 134, Fig. 13, on the arm 133 attached to the shaft 44, allowing the arm to be rotated by the spring motor and the pawl 129 to be drawn by the spring 141 so as to lock the ratchet-wheel 142 to the arm. To this ratchetwheel is fast the pinion 152, and the gear wheels 116, 114 are thus rotated, the lever being returned by engagement of the latter with the rack 119, and the spring 156 completing the final motion of the lever which forces the bar 132 back to the looking position by means of the tooth 127. The number of rotations made by the counter thus depends upon the proper spacing of the teeth 128, 127. In addition, the unit multiplying-key only is employed, and the indicator shows the number of figures added in each column.