Patent GB-444588-A (GB)
Title: Improvements in or relating to setting control mechanism for calculating machines and cash registers
IPC: C08B3/00
Filed: 1934-09-22
Abstract: 444,588. Calculating-apparatus ; accounting-machines. KRUPP AKT.-GES., F., Essen, Germany. Sept. 22, 1934, No. 27271. Convention date, Sept. 23, 1933. [Class 106 (i)] In order to check the accuracy of the initial setting of a calculating machine or cash register, a checking symbol is introduced into the machine by keys at the beginning of a calculation. If this symbol is not in agreement with a symbol formed automatically by the machine to correspond with the data set up, the operation of the machine is interrupted. Means are provided to print a checking symbol corresponding to the result of the operation or series of operations. The invention is described as applied to an accounting machine for dealing with series of transactions, each series comprising the entry of an old balance and one or more items, followed by the calculation of a new balance. The setting field, Fig. 3, comprises amount keys 10, account number keys 11, transaction banks 13, 14, debit and credit item keys 15, old balance keys 15<1>, a balance totalizer control lever 17, a total-taking lever 18 and motor bar 19. In addition three banks of keys 12 are provided for setting up a checking symbol or cipher number. The old balance, account number, and cipher number or symbol are taken from an account card, Fig. 16, and set up by depression of keys 10, 11, 12, Fig. 3, the appropriate old balance key 151 depressed and the machine released by the motor bar 19. If the data is correctly set up, the cipher number calculated by the machine from the old balance and account number will agree with that set up on the keys 12, the old balance will be printed on the record strip, Fig. 17, and the machine conditioned to receive an item by the locking of the old balance keys 15<1> and release of the deposit and withdrawal keys 15. On the other hand, if the data has been incorrectly set up, the cipher numbers will not agree, the data will be printed on the record strip with a sign to indicate its inaccuracy, and the machine be so conditioned that the next succeeding operation must be the taking of a new balance. This new balance is also printed on the record strip with a distinguishing sign, and at the end of the day the amount of the inaccurate entry must be deducted from the amounts in the old balance and new balance totalizers. A new cipher number is calculated by the machine and printed on the account card and record strip upon the taking of a new balance. The cipher'number may be related to or calculated from the data in any manner. In the machine described, the digits of each denomination of the amount and account numbers are each assigned a code number in accordance with the schedule shown in Fig. 1 and these code numbers are summed to form the cipher number. Thus, the cipher number corresponding to an amount of 005,000.00 and an account number of 1234 would be 0+1+22+0+12+ 10+2+21+2+10+12+0=92. Automatic calculation of cipher number. The racks 24, Fig. 10, that communicate the amount and account number settings from the differentials to the type pinions 25 are each provided with cam slots 30, 31 for the units and tens of the corresponding code numbers. Each units slot serves vertically to position an arm 33 carrying a pinion 38 meshing with two wheels 36, 37 on parallel shafts 43, 44, Fig. 11, the wheels of succeeding denominations being so connected that the arrangement serves to accumulate the increments received from the cam-slots and rotate the shaft 44 through an angle proportional thereto. This units setting serves to position a star-wheel 48 keyed to shaft 44 and adapted to co-operate with a projection 87 on a wheel 86 free on the shaft and set by the units bank of cipher number keys. The tens of the code numbers are similarly accumulated by pinions 59 vertically positioned by the cam-slots 31, and meshing with wheels 58, 60 on parallel shafts 51, 52, the total of the tens setting being communicated through the shaft 52 to a star wheel 70 co-operating with a projection 89 on a wheel 88 set by the tens bank of cipher number keys. Transfer mechanism is arranged between the shafts 44, 51 and between shafts 52 and a shaft 69 on which is keyed a star wheel 85 co-operating with a projection 91 on a wheel 90 set by the hundreds bank of cipher number keys. Pinions 68, 72, 84 on the shaft 69 transmit the settings of shafts 44, 52, 69, respectively, to type wheels to print the calculated cipher number. Sequence arrangements. Normal operation. At the beginning of a series of operations, the old balance keys OC, OD, Fig. 18, are free and the item entering keys 15 are locked by a slide 202. Depression of the appropriate old balance key and the motor bar frees the machine to enter the data taken from the account card ; the cipher numbers are compared and if they agree, the slide 202 is lowered to lock the old balance keys and free the item keys. For this purpose the slide 202 is connected through a telescopic link 214, linkage 213<a>, 213b, 213, shaft 131, and arm 132 to a bar 103 that is urged toward the left by a spring 104, but restrained in the position shown by a bell crank 124 while a stud 125 projecting therefrom is supported by an arm 126 flexibly mounted on a bar 101. This bar 101 is controlled by a cam 97 and is released thereby for movement to the left during each operation. However, in all operations other than old balance operations, the bar will be restrained in normal position by a plunger 111 connected to the bar and bearing against the underside of a rack 113 set longitudinally by the' differential of the operation key bank 15, 151. Movement of the bar 101 to the left during an old balance operation serves through bell crank 109, shaft 148 and forked arms 149 to shift the star wheels 48, 70, 85, Fig. 11, towards the projections 87, 89, 91 to compare the cipher numbers. If these agree, the extent of movement of the bar 101 is sufficient to remove the arm 126 from under the stud 125, and the bar 103, thus released, moves to the left to lower the slide 202 and adjust a special type-wheel to non-printing position. The bar 103 remains in its left hand position until a new balance is taken, when it is returned by a rocker 118. This rocker is actuated at each machine operation by a bar 102 rocked by a cam 98, but is held in ineffective position during all operations other than a new balance operation by a lever 114 linked to the rocker and bearing against the underside of the rack 113. However, in a new balance operation, a recess in the rack lowers the rocker and permits it to strike an arm 120 and restore the bar 103. Sequence arrangements. Inaccurate setting. In the event of the old balance data being inaccurately set on the keyboard, the cipher numbers will not agree and the bars 101, 103 will be held in their right hand positions. In this position of the bar 103, the slide 202 will be maintained in its upper position to lock the item keys 15 and the special type-wheel will print an asterisk indicating a faulty booking. Such an entry must be followed by a new balance operation. To prevent the release of the machine for a second old balance operation immediately following a faulty booking, the old balance keys co-operate with a cam plate 201, Fig. 15, to raise the upper part 205 of a telescopic link 205, 206. At the beginning of the faulty booking operation, a stud 208 on the lower part 206 of the link co-operates with a cam 210 on a shaft 209 rotated counterclockwise at each machine operation. At the beginning of the subsequent operation the stud assumes the intermediate position shown in dotted lines. Now if an old balance key is depressed the stud moves to its highest position and blocks a segment 211 connected to the motor bar, thus preventing the release of the machine. During a new balance operation, the stud 208 remains in its intermediate position until it is returned to its lowest position by the cam 210. Hammer impression arrangements. Upper and lower sets of printing hammers 184, 167, Figs. 4 and 4a, are provided to print from typewheels 20 on a record strip 185, Fig. 17, and an account card, Fig. 16, respectively. The hammers are selected for operation by a notched slide 139, Figs. 4 and 14, the upper surface of which co-operates directly with the tails of the lower set of hammers and the lower surface with levers 168 linked to the upper hammers. This hammer-control slide 139 is urged to the right by a spring 141, Fig. 14, and bears by a roller 142 on a stepped transverse slide 143 positioned by the rack 113 that is set by the differential of the operation bank of keys 15, 15'. To prevent the entry of an erroneous new balance on the account card, a slide 136, Fig. 18, on the bar 103, co-operates with a slot 140 in the hammer slide 139 to restrain the latter in a new balance operation following the entry of an inaccurate old balance. Specification 407,927 is referred to.