Patent GB-709155-A (GB)
Title: Record card controlled statistical apparatus
IPC: C03B40/02
Filed: 1952-04-15
Abstract: 709,155. Statistical apparatus. MAUL, M. April 15, 1952 [April 27, 1951], No. 9438/52. Class 106 (1) A coded decimal card of the type shown in Fig. 2 is sensed by brushes 251, Fig. 31, and the readings translated into the single character represented by the code combination as shown in Fig. 2, by a crank driven rod 14, Fig. 5, which passes through a guide 15. The position of guide 15 is variable along the length of the rod 14 and variations in its position vary the path of the free end of the rod 14. The variation is converted by means of a linkage 16 into a reciprocating movement of the member 13. The extent of the scope of the member 13 is varied in accordance with the value of the index positions sensed. The crank 11 is continuously driven at constant speed in counter-clockwise direction. For each full revolution of the crank 11 the card is advanced one position, and the crank 12 is advanced one step in counter-clockwise direction. The adjustment of the guide 15 is effected by the crank 12. The latter makes one revolution for each card run, dimensions are so selected that unequal distances between consecutive positions of the guide 15 on the rod 14 are transformed into equal movements of the crank 12. As may be seen from Fig. 2 the same value 16 has been provided for positions V and VI. The position of the crank drive for these two positions is shown in Fig. 9 and results in the same displacement for both positions although the crank 12 has advanced one step. Figs. 6, 7 and 8 illustrate the intermediate positions of the guide 15. The actual construction of the crank drive is shown in Fig. 10. The rod 14 consists of two adjacent metal sheets with a rectangular cut out 14a in which slides a guide piece 18. The displacement of the guide piece is effected by two links 23 connected to a rocker 28. The crank 12 takes the form of a ratchet wheel with a positive locking device comprising screw heads 36 and a shaped arm 35 which engages one of the screw heads 36 at each locked position. The six screws 36 necessary for the various positions of the guide 35 are spaced a smaller distance apart than the remaining three. The three remaining screws are required in order to restore the crank drive to its home position. During this t'me also printing and card change may take place. The back and forth movement of the pinion 27 Fig. 10, is transferred through a gear mechanism and via a clutch to the printing mechanism. The movement of pinion 27 is transferred to shaft 78, Figs. 17 and 18, and for each type wheel a pinion 45 is provided. The latter meshes with the pinion 46 which is attached to the ring 47, in the ring 47 there is provided a slot 47a accommodating the pawl 48 and springs 49. According to the value of the effective hole position each ring 47 driven by its pinion 45 will be rotated. If the clutch magnet has been energized slightly earlier by a hole in the card the lever 81 will encounter the pawl 48 which will be pressed into a gap between the teeth of the actuating wheel 51, the pawl locking the wheel 51 with it in clockwise direction. Through pinions 52 and 53 the type wheel is thereby moved accordingly. In the counter, Figs. 19 and 20, setting is effected in a similar manner. In this case the drive is from gear 58 meshing with gear 59, gear 59 is fast on ring 61 in which a slot 61a and pawl 62 are provided Engagement is effected by means of a lever 64 which differs from the actuating wheels 51 of the pr'nting mechanism by having only ten instead of thirteen teeth. The actuation through ring 61 from the drive 58 takes place in such a manner that the positions of the gear 64 indicates the accumulator setting and that accordingly the gear 64 represents at the same time the accumulator wheel. The type wheels 54, Fig. 14, are rotatably mounted upon the shaft 98. In each type wheel there is provided a recess 54a in which engages the pawl 99. The pawl 99 is rotatably mounted upon the stud 101 which is fast on gear 53. The toothed wheel 53 and type wheel 54 are fastened to each other. The pawl 99 is pressed by spring 102 against the shaft 98, the shaft 98 is provided with a nut 98a. Upon actuation of the type wheel the latter will rotate in clockwise direction whereupon the pawl 99 slides over the shaft 98 since the shaft 98 is driven by a crank drive it reciprocates backwards and forwards. Depending on the position of the type wheel the pawls 99 are engaged by the groove 98a and will be moved by the latter whereby the type wheels are restored to their home positions. Reciprocation of the shaft 98 has further been chosen so that the latter will move a little more than 47-48 of a whole rotation. During printing the type must be exactly aligned and this is achieved by the yoke 103, Fig. 14, being pressed against the type wheels. In the type wheels grooves 54b, Fig. 15, are provided in which the points 103a of the yoke 103 engage and adjust the type wheel. The setting of the accumulators is effected by a clutch similar to that of the printing mechanism already described. The accumulators are rotated at the rear of the machine, Fig. 14, in two rows, each row comprising twenty-five accumulator places. The drive for the two rows of accumulators is effected by the shaft 161 upon which the gears 58 are fast. The gears 58 operate directly on the upper accumulator places through the idle gear 162 on the lower accumulator places. The transfer mechanism is of a known construction similar to that of the Hollerith machines. The analysis of the accumulator places must be effected in such manner that the result of each place can be composed of partial values. A further condition is that the places before the highest digit of a number shall not appear in printing as zero and therefore shall not be transferred to the printing mechanism. Card feed.-The card feed is effected by means of two chains 227, Figs. 14 and 33, the card is moved from the magazines 229 in a known manner by means of the knives 228, Fig. 14. Both knives 228 are mounted on the slides 231 guided by the two pins 232. The movement of the slide 231 is effected by a crank drive. The crank 233 is fast upon a shaft 235 together with the chain wheel 234, the dimensions of the chain wheel having been chosen in such manner that one revolution of the chain wheel corresponds to the extent of feed of one card. The upper end of the link 236 is connected with the slide 231 and the lower end with rocker arm 238. The card is fed by the knives 228 between the rollers 241 and the rolls 242 and is then advanced by the latter. The pressure of the rolls 242 have been so chosen that on a predetermined resistance of the card the rollers 241 will skid with respect to the card. The diameter of the rollers 241 is somewhat larger than the pitch circle diameter of the chain wheel whereby the feed through the rollers is effected somewhat faster than that by the chain. If the card is gripped by the rollers 241 and the roll 242 it will run faster than the chain until its leading edge engages the noses 227a of the two chains 227. In this way any tendency of the card to deviate laterally will be corrected. As soon as the rear edge of the card leaves the rollers 241 the next noses 227a will take over the feed. The distance between two noses corresponds exactly to the width of the card, the chain effects only the feed of the card, the card rests upon the bed 246 which serves at the same time as the chain guides. The card first passes below the first set of brushes 247 serving for group control, Fig. 31. Then the card passes under a second set of brushes 248 which effects the analysis. Both sets of brushes are alike in their construction and are held between the two holders 249. In order to permit the ratchet feed to be effected without jamming the brushes are raised which is effected by rocking the holders 249 upwards. The movement of the card change is effected step by step. The step by step movement is so arranged that the card is moved slowly during analysis, while the card change takes place rapidly. The rhythm of the card feed agrees with that of the crank drive. It is so subdivided that six operating steps and three idle steps are necessary. The drive for the card feed is effected by the gear 67, Fig. 33, serving in this instance as a crank. The rocker 281 is connected to the crank by means of link 282, the rocker 281 is pivotally mounted on the bolt 283 screwed to the angle 260. The pawls 284 and 285 are pivotally mounted on the rocker 281 and act on the ratchet wheels 286 and 287, both of which are fast on the shaft 261. The teeth on the ratchet wheels are not distributed around the whole circumference. They are distributed in such a way as to allow one pawl to continue the operation of the other. The pawl 284 and the ratchet wheel 286 serve for the rapid feed which occurs on a card change. Pawl 285 and ratchet wheel 287 take over the slow feed for analysis. While the one pawl is operating, the other one is sliding upon that part of the ratchet wheel circumference which does not have any teeth. Corresponding to the rapid feed the pawl 284 has a larger stroke and the ratchet wheel 286 a larger pitch, while the pawl 285 has a smaller stroke and the ratchet wheel 287 a smaller pitch corresponding to the slower feed. The difference in the stroke is obtained by providing the pawl on the rocker 281 with different lever arms. The exact determination of the position as well as locking against backward movement is effected by the detent wheel 288 and the detent spring 289, Fig. 33. The detent wheel 288 is also fast on the shaft 261, spring 289 is rigidly screwed to the side wall 279 and is adjustable by means of elongated holes so that the position of the card may be exactly determined. The teeth or the tooth spaces of the detent wheel 288 are so arranged that they are distributed in accordance with the pawl feed. In order to prevent too much play during