Patent GB-221255-A (GB)
Title: Improvements in and relating to the main operating mechanism of record controlled machines for compiling statistics
Filed: 1923-05-30
Abstract: 221,255. Haddan, A. J. H., (National Cash Register Co.). May 30, 1923. Statistical machines with operating-means. - In record-controlled machines for compiling statistics such as described in Specifications 158,084, 181,072, 184,429, 184,824, 185,071, and 185,075, the main operating mechanism is provided with a manually controlled means for effecting the change of the machine from adding or analyzing to total-taking for producing a summary record of the data accumulated on the totalizers, the said means being adapted to vary the position of certain of the operating cams with respect to the main shaft as by declutching them, rotating them through a predetermined angle and reclutching them to the shaft. Means are also provided for locking the main shaft and starting key and for preventing action of the analyzer when effecting the change. Operating by motors.-A main shaft 150, Figs. 1 and 12, through gearing and clutch mechanism is adapted to be driven by a motor 157 and transmits movement to a supplementary drive shaft 151 and to a shaft for operating the totalizer selecting means. The motor spindle carries a worm which gears with a worm wheel 159 loose on a shaft 163, Figs. 17, 18 and 20, and integral with one member 160 of the clutch, the other members of which comprise a plate 161, Fig. 20, on a sleeve 162 secured to the shaft 163 and a plate 165 loose on said sleeve and having rollers 164 for coupling the member 160 and plate 161. Normally the plate 165 is held by an arm 821 fixed on a shaft 811 that is provided with an arm 810 having a pin 809 co-operating with an L-shaped slot in an arm 807 clutched to the starting key 805. The arm 807 has a pin engaging a bell-crank lever 812 co-operating with a switch 816 in the circuit of an electromagnet 845. The clutch release arm 821 also engages a plate 823 on a cam disc 824 loose on the sleeve 162 and which is connected by a pin-and-slot connection and torsion spring to a second cam disc826 on which rests a roller on a lever 832 loose on the shaft 811 and co-operating with a motor starting switch 833. Depression of the starting key rocks the arm 807 and lever 812 so that the pin on the arm 810 engages the horizontal part of the L-shaped slot while the release of the key moves the arm 807 until the pin is opposite the vertical portion of the slot so that the arm 810 and shaft 811 are rocked and the lever 812 held in position to maintain the switch 816 in the closed position to energize the magnet 845. Rocking of the shaft 811 disengages the release arm 821 from the plate 165 and cam 824 which is thereby rotated to rock the lever 832 to close the motor switch 833. At the same time another arm 837, Fig. 16, secured to the shaft 811 is rocked to free it from engagement with a projection on the transmission pinion on the shaft 163; the arm 837 is bifurcated to engage a pin 839 on a link 840 associated with the armature of the electromagnet 845, the pin being withdrawn when the switch is closed. The pin 839 in the withdrawn position is still in engagement with the slot in the end of a lever 850 which is adapted to be rocked by a pitman 854 and serves as a restoring means at the end of a cycle of operation when the electromagnet is de-energized. Printing totals; interlocking.-The selection of the totalizers and the differential positioning of the actuating racks are effected by cams and clutch members on the main shaft 150 as described in Specification 221,134. In adding operations the selection and rack movement are simultaneous, in total-taking the selection is first effected and the movement of the racks occurs subsequently. In order to effect the desired change a manuallyoperated shaft is provided; this shaft 321, Figs. 1 and 12, carries a Geneva wheel 900 which cooperates with pins 902 and locking-surface 907 on discs 903, 904 to which is attached an operating handle 908. Fig. 2. The shaft 321 is provided with an indicator disc 909 and is prevented from turning beyond its normal position by a projection 910 on the disc 903 engaging a fixed pin 911. To change the timing of the differential actuating mechanism by altering the position of the contact members with respect to the contact segment the actuating cams 310, 311, Fig. 10, are rotated by means of a cam drum 930 loose on the shaft 321. The drum comprises end parts secured together and a loose collar 931, Fig. 1, between them, the collar being engaged by pins 932, Fig. 9, on a. pair of arms 933 provided with pins 934 at their other end which engage an annular groove in the clutch 314 that couples the cams 310, 311 to the main shaft. The shaft 321 has fixed thereto an arm 937 that is also pinned at 938 to the drum 930 and that carries pins 939, 940 which when the shaft is rotated engage slots in a disc 312 secured to the cams 310, 311 so as to rotate them. At the same time the cam drum through a projection 936 on the pair of arms rocks the arms to disengage the clutch pins, re-engagement of the pins with holes 946 in the disc 312 being effected when the turning of the cam is completed. The time of the disengagement of the actuating racks 277, Fig. 6, is also changed by means'of a cam drum 950 and a pair of arms 951 similar to those above described. Rotation of the drum 950 disengages the clutch 328 associated with the cam disc 327 of a pair of cams 326, 327 and a pin 957 on said drum by engagement with a notch in the cam disc 327 rotates it until the clutch pins 329 are ready to enter holes 959, 960 in the cam disc. It is necessary also to change the time of engagement of the totalizer aligning bars 355; the cams 365, 367 which operate the bars 355 are connected to the main shaft directly and through a clutch 368 respectively which clutch in a manner similar to that described for the clutches 314, 328 is disengaged by a cam drum 963 and an arm 966 on the drum engages a notch in a disc 968, Fig. 5, on the cam disc 367 which is thereby rotated until the clutch pins enter the holes 969, 970. In a similar manner the cams 415, 416 actuating the analyzing mechanism, described in Specification 221,163, are rendered ineffective a cam drum 975 being provided to disengage a clutch 417. A plate 979 secured to the cam disc 415, Fig. 21, prevents movement of the cams when the clutch is disengaged by engagement with a pin 981 on an arm carried by the drum 975. When the shaft 321 is being rotated the main shaft 150 is locked by means of a disc 914, Fig. 13, secured to the disc 904 and having a cam groove engaged by a pin on a lever 917, a second pin 918 on the lever being adapted toenter a notch in a disc 920 on the main shaft. During the change over depression of the starting key is prevented by the hooked end 926 of a lever 922 engaging a. depending arm on the shaft 811. The lever 922 is pivoted to the frame and is adapted to be rocked by the disc 914 which engages a pin 923 on said lever. When the shaft 321 is operated other cams loose on the shaft 151 are adapted to be clutched thereto to effect the operation of the perforating and printing mechanism, the operation of the zero stop mechanism and the operation of the switches controlling the selection of the totalizers.