Patent GB-388413-A (GB)
Title: Improvements in or relating to calculating or accounting or tabulating machines
Filed: 1931-06-25
Abstract: 388,413. Calculating - machines. ENGLISH, F. G. S., 42, Lavender Road, West Croydon. June 25, 1931, No. 18349. [Class 106 (i).] Statistical machines ; total taking ; adding and subtracting apparatus ; with several totalizers.-A calculating or an accounting or tabulating machine including accumulator wheels ancillary to the normal totalling wheels for registering the totals of the latter comprises means which differentiate between totals of a different order registered on the normal accumulator wheels and operable on a predetermined operation of the machine, for example, a total stroke, to actuate the ancillary accumulator wheels to receive the total if the load is of a particular order, or to render the ancillary accumulator wheels inoperative if the total is of another order thereby to prevent transference of the total from the normal accumulator wheels. As applied to a tabulating machine controlled by perforated record cards and spring-pressed analysers, such as the machine described in Specification 26896/13, [Class 106 (i), Calculating &c.], the analysing pins 4, Fig. 1, in moving upwards to engage the perforated record card positioned between the plates 2@ raise a selection of extension rods 5 and stops NS, which arrest the corresponding adding sectors 6 when these are released for their forward movement. The adding sectors together with their associated printing sectors 8 (which in Fig. 1 form part of a debit balance unit) thus take up positions in usual manner according to the perforations in the card. A Y-connection of the rods 5 extends to the corresponding unit for registering the individual amounts. After the forward movement of the sectors 6, accumulator wheels 10 carried in a slotted cam support 13 rocked by a link CCL in a manner similar to that described in the above-mentioned Specification, are brought thereby into mesh with the sectors and on the return of the sectors receive a proportional rotation to register the amount represented by the perforations of the card. When a grand total stroke is taken, however, the accumulator wheels are retained in mesh with the sectors during the forward stroke and may be brought out of engagement on the return stroke to zeroize the accumulator wheels, or alternatively, they may remain in engagement to retain the total. After the forward movement of the sectors 6 a printed record is struck on the printing sectors 8, the actuating mechanism for the printing hammers and the general mechanism for actuating the sectors being similar to that described in the above-mentioned Specification. The printing sectors 8 are each connected by a link 18, pin and slot 20 and spring 18a to a corresponding toothed sector 17 which consequently always reproduces the setting of its sector 6. The sector 17 may be engaged by a grand total accumulator wheel 21 at the appropriate time by control mechanism described below. When a total stroke is taken, a back total shaft 39 is rotated in an anticlockwise direction, Fig. 1, and causes a pin 32 to raise a bar 30 reciprocated abruptly by a cam 22. The rise of the bar engages a slot 34 with a pin 36 carried by a lever 37. The lever 37 is then rocked by the bar and the accumulator wheels 21 are brought into gear with their sectors 17 for the return stroke by linkage 56, 57 and a slotted plate lever 53 whereby the wheels 21 receive the totals from the wheels 10. When a grand total stroke is taken (due to the passing of a grand total card or caused by mechanism described in Specification 371,849) an extension rod 5 raises a pivoted arm 43 and stop member 41 into engagement with the mechanism and causes the pin 32 to move the bar 30 downwardly so as to engage a slot 33 with a pin 35 and rock the lever 37 so as to engage the accumulator wheels 21 for the forward stroke. During a grand total stroke the accumulator wheels 10 are held out of engagement with the sectors 6 by the intervention of the accumulator cam control link CCL which is raised by an arm 48c connected to a link 48 moved only on a grand total stroke. The means for rocking the back total shaft 39 on a total stroke being taken is shown in Fig. 6, wherein a cam 59 (which may cause a total operation to take place as described in Specification 271,935, [Class 106 (i), Calculating &c.], aligns a stepped slot 64 with a projection 62 so as to permit a cam 66 to actuate linkage 63, 75, 76, 78 connected to the back total shaft 39. The following mechanism is provided for preventing negative totals being transferred from the accumulator wheels 10 so that the grand total wheels 21 record only the positive totals, for example, for use in calculating the interest on overdrafts. The normal carry pawl 85, Fig. 1, of the end wheel 10a Fig. 2, of the balance accumulator wheels (which end wheel is not used for the accumulation of positive amounts) is substituted by a control link 88, Fig. 2, having a curved bearing surface 111 adapted to bear on a cam 84a which, in the " 9 " position of the end accumulator wheel 10a (which position is indicative of a negative amount on the balance unit) prevents the rear arm 91 of the link from rising. The rear arm 91 prevents a pin 92 resiliently carried by the back total shaft 39 from rising, and an arm 96 actuates a link 99, cam 103, pin 105 and plate 108 so as to disconnect the shaft 37a from the gear meshing mechanism 57, 56, 51 and prevent the accumulator wheels 21 being placed in mesh to receive the accumulated total. In other positions of the cam 84a (that is when dealing with positive amounts) the pin 92 is permitted to rise and raise the link 99 out of the influence of the actuating arm 96 thereby permitting the grand total accumulator wheels 21 to mesh and receive the transmitted total. By turning a handle 116 and thus rotating the cam 103 to an ineffective position, the link and cam device 88, 84a may be rendered inoperative. The grand total attachment may be rendered inoperative as regards recording the totals by rotating an arm 106 carrying the pin 105, through 180‹. Printing of the negative totals which are not transmitted to the accumulator wheels of the grand total attachment is prevented by mechanism shown in Fig. 5. In the " 9 " position of the end sector 6 of the end wheel 10a (indicative of a negative total) a pin 116 on the sector displaces a catch 119 from a stop 123 and permits a spring 125 to actuate levers 127, 131 so as to move a shutter 133 into the path of the printing hammers ph and prevent them striking the type sectors 8 when released from the latches lm as described in Specification 26896/13. A rocking arm 137 engaging a pin 126 restores the shutter 133 and its connected levers to initial position. Sub-total taking.-In order to cause the balance unit accumulator wheels to retain the total on a total stroke, the accumulator wheels 10, Fig. 1, are caused to remain in mesh with their sectors 6 on the return stroke by pushing in a button 138, which action affects the movements of the accumulator cam control link CCL and the support 13 of the accumulator wheels 10. The button 138 must be released before taking a grand total.