US1939077A - Accounting machine - Google Patents

Description

Dec. 12, 1933. A. w. MILLS 1,939,077

,AGCUUNTING MACHINE Filed July 3, 1930 10 Sheets-Sheet l FIG. I.

5140014 507 A BERT W. MILLS @51 i xflfiom Dec. 12, 1933.

A. w. MILLS Y 1,939,077 ACCOUNTING MACHINE I Filed July 3, 1930 10 Sheets-Sheet 3 ALBERT W. MILLS Arron/my Dec. 12, 1933. w M LL 1,939,077

ACCOUNTING MACHINE, Filed July 3, 19:50 10 Sheets-Sheet 4 Qwuantoz ALBERT Mugs 331 fflbtomgq L Dec. 12, 1933. A. w. MILLS ACCOUNTING MACHINE Filed July 5, 1950 10 Sheets-Sheet 5 FIG. 6.

gnoanboz ALBER W. MILL S @51 11414 (M tom Dec. 12, 1933. w 1,939,077

ACCOUNTING MACHINE Filed July 3, 1930 10 Sheets-Sheet 6 66 Wall/M11 59. FIG n FIGJO C5 I59 25' (gm center ALBERT WJWu-Ls 33%;; 114'! 61 mm 1933- A. w. MILLS 1,939,077

ACCOUNTING MACHINE Filed July 3, 1950 10 Sheets-Sheet 7 F FIG.I2. l

7 ALBERT W MILLS 75b m I 7 7 4 @5 71.11 4 elf WWW Dec. 12, 1933. A. w. MILLS ACCOUNTING MACHINE Filed July 3, 1930 10 Sheets-Sheet 8 FIG. I3.

FIG. 14.

DEBIT coumeas CREDIT COUNTERS NATURAL COMPLEMENT NATURAL COMPLEMENT 00000 99999 00000 99999 499 49s 92! 921 49s 99 994 --92 a 99 7 9 99 94s 99 SM 00499 99940 T0 PRMTER F IG 15. FIG 16 NATURAL 1 COMPLEMENT NEURAL COMPLEMENT 0.0000 99999 00000 99999 92: v 92: I J 499 49s -92 99|79 -4ss 99994 99 4 9 94 7 2 I 7 2| a9|9 990-91 |4s9. 9994a T PRWTER FIGJB;

DEBIT CREDH' CRED \T -'l9l8 Z09 ISIS I458 SALANCE 4- 6 0 4- 6 0 sumac;

avwem'foz ALBERT W. MILLS Bali-51960421404 Dec. 12,1933. A w us 1,939,077

ACCOUNTING MACHINE Filed July 3, 1930 10 Sheets-Sheet 9 4| I FIG 19 KHZ ,IBOm 51 El 153 212 (UM Gents; AL5ERT WMILLS Dec. 12, 1933. A, w MlLLs, 1,939,077

ACCOUNTING MACHINE Filed July 5, 1930 10 Sheets-Sheet 10 Svvvemioz ALBERT MILLS Patented Dec. 12, I933 ACCOUNTING MACHINE -Albert W. Mills, East Orange, N. J., assignor, by mesne assignments, to International Business Machines Corporation, New York, N. Y., a corporation of New York Application July 3, 1930. Serial No. 465,540

13 Claims. (Cl. 23592) This invention relates to perforating card controlled accounting machines and more particularly to accumulating devices used in such machines. In application Serial No. 442,348, filed by John Royden Peirce on April '7, 1930, an accounting machine is disclosed' in which perforated cards are fed through the machine and are analyzed by electric brushes while the cards are in motion. The data taken from the cards is printed and is also run into the accumulating devices either as positive numbers or negative numbers. In my invention I employ an accounting machine similar to that disclosed in said application butemploy a novel type of accumulating device.

One of the objects of the present invention is to devise an accumulating device in which numbers may be, entered as natural numbers and in which certain numeral wheels will receive the numbers as natural numbers and certain other numeral wheels will receive the complementaryvalue of such'natural numbers.

Another object is to. devise a machine of this character in which a differential driving mechanism causes one of the numeral wheels to constantly rotate and in which the number isentered by causing stoppage of rotation of such numeral wheel and causing the other numeral wheel to rotate.

Another object is to provide a device in which some of the accumulating units may be employed to receive credit data in the form of natural and complementary values and in which other units" are'adapted to receivedebit data in the form of natural numbers and complements thereof and in which the machine may determine whether the difference between the total credits and total of debits is a creditor a debit balance and may print the balance as a debit or a credit.

Other objects of the invention will appear in the following description.

Fig. 6 is a detail of part of the accumulating unit shown in Fig. 3, showing the complement numeral wheel; I

Fig. 7 is a detail of the device showing the complement numeral wheel latched against rotation; t

Fig. 8 is a detail showing a device for carrying one from a given order through the accumulating wheel of the next higher order when such order contains'the value 9 and into the unit of a still higher order;

Fig. 9 shows the position of the parts of Fig. 8 after the accumulating unit has passed from the 9 position to or through the zero position for causing the one to be carried from such accumulating unit to the unit of the next higher order;

Fig. 10 is a section substantially on line 10-10 of Fig. 3 showing the construction of an accumulating unit;

Fig. 11 isa diagrammatic view showing the feed of the cards withrespect. to the perforation sens- 75 ing brushes; a

Fig. 12 is a view showing the operation of mechanism for setting the machine to take a total; 1 1

Figs. 13 and 14 represent the operations of 80 debit and credit counters in accumulating debit and credit items and also representing the manner in which the machine ascertains the difierence between the total debits and total credits and determines whether the difierence is a debit 35 value or a credit value; 1

Figs. 15 and 16 represent the operation of the machine where the result is the reverse of that shown in Figs. 13 and Hand the balance is a negative balance; I 9

Fig. 17 is a view of a printed sheet showing" the debit and credit amounts entered into the machine during the computations of Figs. 13 and 14;

Fig. 18 is a similar printed record of the com- 95 putationsshown in Figs. 15 and 16;

Fig. 19 is a wiring diagram of the control of the machine in general; I

Fig. 20 is a wiring diagram showing the operation of the accumulating units.

As shown in Fig. 2 the machine is driven from an electric motor or other power source through a belt 1 mounted on a pulley 2 fixed on a shaft 3 having a worm 4 meshing with a worm wheel 5 on shaft 6.

In Fig. l the shaft 6 is shown as having a gear 7 mounted thereon and meshing with a gear 8 which in turn meshes with a gear 9 on a shaft 10. Also mounted on" this shaft is a bevelled pinion 11 meshing with a bevelled pinion 12 on 110 a vertical shaft 13. Fixed on shaft 13 is a bevelled pinion 14 meshing with a bevelled pinion 15 fixed on-a shaft 16 which reaches across the back of the machine. Also fixed on shaft 13 is another bevelled pinion 1'7 meshing with a bevelled pinion 18 fixed on a shaft 19 which also reaches across the machineabove the shaft 16; Both the shafts 16 and 19 have fixed thereof a number of gears 20 (see Fig. 3). I

Each accumulator unit is mounted ona plate 21 and is provided with a gear 22. The units may he slid into position between upper and lower supporting plates 23, 24 as in Fig. 2. When in this position the gear 22 meshes with one of the driving gears 20. When the machine is in rotation on a stud 26. Mounted within the gear 25 are two pinions 27, 28 being carried by studs 27a and 28a fixed in the gear 25 (see also Fig. 10). Thepinions 27 and 28 are in mesh with each other as indicated in Figs. 3 and 10. As the gear 25 is rotated about stud 26 they are carried bodily around. The pinion 27 isalso in mesh with a gear 29 and pinion 28 is in mesh with a gear 30 both loose on stud 26. Fixed with respect to gear 29 is a numeral wheel 31 and fixed with respect to the gear 30 is a numeral wheel 32 (see also Fig. 5).v

32 to turn. The wheel 31 is adapted to be held by a latch 33 so that it cannot normally rotate. A latch 34 is also provided for cooperation with numeral wheel 32 but is normally disengaged therefrom as in Fig. 6 so that this wheel is normally free to rotate. Thus during the normal operation of the machine the gear 25 is constantly turning and the numeral wheel 32 is constantly turning in a counter clockwise direction while the numeral wheel 31 is constantly still. The rate of rotation of the wheel 32 is such-that it will move a distance equal the length of one of its teeth during the time that it takes for the data card to travel through the machine a distance equal to the distance between two of the index positions thereon. In other words, as a datacard 35 (Fig. 11) is moving past the sensing brushes 36, the index point positions on the card will pass under the brushes in succession at a rate equal to the time that it takes for one of the teeth of the numeral wheel 32-to travel past the latch 34.

Where a perforation appears in a given column on the card a circuit will be established through the corresponding brush 36 and through the magnet 3'1 of the corresponding accumulating unit. The armature 38 of this magnet will then be attracted, releasing arm- 39. This will permit the arm 39 to rock clockwise upon its pivot 40 under the action of a spring 41' which is connect- .ed to studs 42, 42a and is pressed by the projec- .wheel 32 to.st-op the rotation thereof.

1 While this is taking place the latch 33 which has a downward projection 33a cooperating with the finger 45 fixed with respect to arm 39 will be moved out of cooperation with its numeral wheel 31. A spring 46 acting against the projection 33a will cause the latching pawl 33 to move back into cooperation with the wheel 31 when the arm 39 is later restored to its normal position. The

latch 33 it should be understood is loose on the 81' stud 40. Thus when a perforation in a given column of a card passes under the sensing brush 36, the wheel'31 of the corresponding accumulating unit will commence to rotate and the wheel 32 of that unit which was rotating is caused to 85 stop. This condition of the parts continues during the remainder of the passage of the card until ,the zero index point position thereon reaches the sensing brushes. At this time the projection 47a on cam 47 fixed with respect to. the gear 22 so will engage a finger 48 rocking the latter about its pivot'49 moving link 50 to the left. This restores the arm 39 to its normal position where it will be latched by an armature 38. This removes the latching pawl 34 from the wheel 32 and 9 permits the latch 33 to move into cooperation with the wheel 31. The wheel 31 will then have turned from its zero position a number ofsteps equalto the value represented by the position of the perforation inthe card. In other words, if the perforation in the card is in the 6 position the wheel 31 will be unlatched when the perforation passes under the brush and will continueto rotate untilthe zeroposition reaches the brush and will thus have turned 6 steps so as to contain the value 6. During this operation thecom plement numeral wheel 32 whose normal position represents the value 9 will have dropped back of the wheel 31 a distance of 6 steps and will now be in position with respect to the wheel 31 and to the machine cycle representing a value of 3 which is the complement of the value 6. I

Carrying Attached to the natural numeral wheel 31 is-a cam disk When the wheel 31 passes from its 9 position to its zero position a projection 56 on the disk 55 will cam the arm 57, pivoted at 58 and acted upon by spring 59, into the position of Fig. 9. The arm 57 carries electric contact brushes 6061. In the position of Fig. 9, the brush 60 is adapted, as the disk 62 which is attached to the gear 22 rotates, to be engaged by projection 63. A current-supplying brush 64,, constantly in contact with. the cam disk 6Z,*-'-""is adapted to supply current to the disk. At the end of an adding cycle of operation of the machine if the arm 57 is in the'position of Fig. 9 the projection 63 will engage the brush 60 and complete a circuit through the magnet 37 of the adding unit of the next higher. order. This will cause the latchingpawl 33 to disengage its wheel -31 at a point in the/cycle of operation of the machine which will permit the wheel 31 to turn one notch to accumulate an additional one. The

adapted to cause the latch to cooperate with the arm. After completion of the carrying operation and-before the beginning of a new accumulating, cycle the finger 65a of the latch 65 will be engaged by a cam projection 68 (Fig. 3),

rocking thelatch 65 to inoperative position releasing the arm 57 and permitting the arm to be rocked clockwise by its spring 59 against the 15;}

periphery of the cam disk 55. In this position neither of the brushes 60, 61 will be in position to close a circuit through the commutator dis 62. When a wheel 31 is in position representing the value 9 its disk will be in the position of Fig. 8 with respect to the arm 57. The spring 59 will then rock thearm 57 into the notch as in' Fig. 8. This. will rock the brush 61 into position to be engaged by cam projection 71 on the commutator 62 during the carrying time of the cycle of the machine. The purpose of this contact is to prepare the device so that where 1 is carried into a given accumulating wheel, if that wheel is standing at 9 it will also cause carrying to the wheel ofthe next higher order. Thus if 1 is carried into the wheel associated with the carry disk 55 of Fig. 8 it will also be carried through the brush 61 to the magnet 37 of the next order above that represented by the disk 55 of Fig. 8.

Totaling When a total is to be taken a magnet 72 of Fig. 12 is energized rocking the armature 73, raising the latch 74 to release the arm 75. This permits hammer 75a acted upon by spring 75b to strike a toggle comprising arms 7677 pivoted at 78-79 and interconnected at 80 to break the toggle. This permits arm 82 fixed on shaft 83 to rock counterclockwise with the shaft. The other end of shaft 83 (Fig. 1) has an arm 83a fixed on it and acted upon by a spring 83b to cause the shaft to rock clockwise as viewed in Fig. 12. Fixed on shaft 83 is an arm 830 connected by link 83d to a latch 83e. A cam follower 84 carried by arm 85 loose on shaft 83 is adapted to cooperate with the cam 86 mounted on shaft 10 which is constantly rotating. A link 88 connects arm 85 to an arm 89 fixed on a grooved shaft 90. An arm 91 also fixed on this shaft is connected by a link 91a to a similar grooved shaft a (see Fig. l) The latch 83c. holds arm 89 depressed. Grooved shafts 90-90a as shown in Fig. 3 normally hold arms 44a (one for each accumulating unit) in depressed position as in Fig. 3'.

When-the magnet 72 is energized shaft 83 rocks and latch 83e releases arm 89 and the shafts 9090a. Springs 41 may then rock arms 44a and shafts-90, 90a, raising link 88 and causing follower 84 to follow cam 86. Each arm 44, 44a is I normally held by a latch 94. When shaft 90 releases arm 44a. and latch 94 releases arm 44 the spring 41 will be free so that instead of tending to press the latching pawl 34 into engagement with the wheel 32 it will exert pressure in the opposite direction to tend to rock the arm 34 out of cooperation with disk 32 and at the same time cause the latch 33 to move into cooperation with its disk 31. The rocking of arm 44 does not take place at the moment that the magnet 72 is energized as the arm 44 is latched in position by the pawl 94. A spring 95 tends to hold the latch in this position. Fixed to the rock arm 57 is a stud 96. During the totaling cycle of the machine the wheels 31 will rotate when released for rotation by energization of magnets 37 through contacts TS4 as described hereinafter; all of these wheels commencing rotating at the beginning of the totaling cycle. As each wheel passes from its 9 to its zero position the cam 55 ;will rock the arm 57 to the position of Fig. 9.

At this time the stud 96 on the arm 57 will engage the finger 94a fixed with respect to the latching pawl 94 and will rock the latch out of cooperation with arm 44. This releases the spring 41 from the influence of the arm 44 and the pawl 34 is immediately disengaged from the wheel 32 and the pawl 33 at the same time moves into engagement with its wheel 31. wheel 31 will be stopped in its zero position and the wheel 32 will commence to rotate; Arm 39 will be latched by the armature 38. The parts will then be in position for a new accumulating operation. Also fixed with respect to each wheel 31 is a cam disk 97 (Fig. 3).

When the wheel 31 reaches its zero position a projection 98 on the disk 97 will close contacts 99. This will energize printing magnets 100 (Fig. 2), to bring about the printing of the total contained in the numeral wheel 31. The energization of the magnet 100 associated with each accumulating wheel 31 will take place at a point in the cycle of the machine depending upon the value contained in the respective wheel 31. Synchronously with the movement of the wheel 31 a type bar 101 carrying the individual type members 102 rises through the printing position with respect to the platen 103. When the magnet 100 is energized its armature 104 will move a connecting wire 105 rocking the latching pawl 106 and permitting the pawl 107 to move into cooperation with the teeth 108 carried by the type bar. This will stop the type bar in positionto present the individual type element 102 in the printing line. The type which is stopped in printing line will correspond to the time of energization of magnet 100 which in turn corresponds to the value contained in the wheel 31 so that this value will be printedupon a strip of paper carried by the platen. The hammers 109 for actuating the type elements and their operation are more fully disclosed in the copending applications of John Royden Peirce, Serial Nos. 442,348 and 426,- 582 and need not be described in complete detail here. At the end of a total printing operation, as the shaft 10 continues to rotate, cam 86 will engage the follower 84 and restore the grooved shafts 90-90a to normal position. Prior to this the cam 68 of Fig. 3 will have actuated the latch 65, releasing the arm 57. The arm 44. will thus be free to berestored to its normal position in engagement with the spring 41 and the latch 94 willbe free to latch the arm 44 in this position ready for a new accumulating cycle of operation.

When cam 86 depresses follower 84 and link 88, a cam 110 fixed on shaft 10 depresses follower 110a. on arm 11072 which is integral with arm 83c. This permits latch 83c to latch arm 89 and shafts 90, 90a in restored position. It also rocks shaft 83 and restores the; toggle 74, 76. A cam 111 on shaft 10 will also rock arm 112 causing stud 113 to restore the hammer 75a where it will be latched by latch 74.

Fixed on the shaft 83 (Figs. 2 and 12) are arms 115 connected to side plates 116. Connected between the plates 116 are bars 117 carrying electric contact members 118 adapted to control the opening and closing of several sets of contacts designated generally as 119 and specifically as 119a, 119b, 1190 as shown also in Fig. 20. The contacts 1190 are normally closed and contacts 119a and 119D are normally opened. When the magnet 72 (Fig. 12) is energized and the shaft 83 is rocked the condition of these contacts is reversed, that is, contacts 119a and 11% which are opened become closed and 1190 becomes opened. This controls the circuits when taking totals.

Thus the- Type bar operating mechanism Referring to Figs. 1 and 2 a gear 120 loose on shaft 6 meshes with a gear 121 which in turn meshes with gear 122 fixed on the cam shaft 123. Complementary cams 124, 125 are adapted to control the follower arm 126 pivoted at 127. A link 128 is connected to the arm 126 and to arm 129 fixed on the shaft 130. Also fixed on this shaft are arms 131 connected by links 132 to a bail 133. This bail reaches across arms 134 which are pivoted at 135 and are connected to the type bars 101. Springs 136 connected to the arms 134 I and to abar 137 carried by the arms 131 are adapted to raise'the arms 134 to raise the type bars. 1

When the shaft 123 causes the shaft 130 to rock clockwise in Fig. 2 the bail 133-will be raised permitting springs 136 to raise the type bars. This-operation takes place synchronously with the operation of the accumulating apparatus as well as the feeding of the cards so that the individual type elements 102 will be moved through printing position as each index point position on the card moves past the sensing brushes and as the accumulating wheels move through one step of their rotation. The type actuating hammers 109 are actuated by springs 140 and are restored by a bail "141. This bail is fixed on shaft 142 on which the hammers are loosely mounted. Also fixed to the shaft is an arm 143 connected by a link 144tq an arm 145 fixed on shaft 146 on which is also fixeda cam follower arm 147 cooperating with complementary cams 148-149 on the shaft 123. When the bail 141 releases the hammers the latter will be held by latches 150. These latohesare pivoted at 151 and are connected to spring pressed fingers 152 adapted to cooperate with the bail 153. When the type bar is in its normal position a pin 154 holds the finger 152 .out of cooperation with the bail 153. When a type bar rises to present a type element 102 in position for printing the finger 152 is released so that it will rock into cooperation with a bail 153. Thereafter when the bail is rocked to the left in Fig. 2 it will move the finger 152 for printing and will rise in synchronism with,

the operation of the accumulator wheels and with the feeding of cards. When the magnet is deenergized the type bars stop at a definite point in the cycle of the machine and when reenergized the type bars start at a definite point in the cycle. 1

Card feed Any well known card feeding mechanism may be employed to' feed the cards through the machine. In Fig. 11 card feeding rollers 158, 159 are shown to represent conventional card feeding mechanism. The card feeding rollers 159 may be connected to gear 160 (Fig. '1) for operation.

The gear ratio is such that the'successive index point positions on the card will feed past thesensing brushes 36, 36a at the same rate that.

the type bar is raised and the accumulating wheels are rotated. The pinions 160 are driven by a gear 161 which is driven from shaft 6 'and is controlled by a clutch magnet M3 similar to magnet M2. When the clutch magnet is energized cards will be fed in synchronism with the operation of the rest of the machine. When the clutch is deenergized the feeding will stop at a predetermined point in the cycle of the machine.

- Contact control cams and contacts In the wiring diagrams the contact control cams designated CR are constantly running and may be mounted on the shaft 10 of Fig. 1. The cams designated as CF cams operate while cards are being fed and may be mounted on the shaft 162, Fig. 1, driven by the card feed gear 161. The contacts designated as TS contacts are controlled by, the total switch of Fig. 12. They are shown in normal position and will be reversed when the total switch is set for totaling.

Wiring diagram To start the machine the switch175 will be closed, supplying current to the operating motor 176. The start key 177 will now be depressed. This will close the contacts K1, K2 thus closing a circuit from the line 178 through wire 179, contacts K3 normally closed, contacts K1 now closed, wire 180, contacts TS7 normally closed, card feed clutch magnet M3, wire 180a, contacts K2, wire 181, back to the'other side of the line 182. The energization of magnet M3 will cause operation of the card feed mechanism to feed cards through the machine. This magnet also controls the contacts CFC1, closing them when the magnet is energized. As the cards commence feeding through the machine they will depress the upper card leverUCL, closing contacts 183, 184 and opening contacts 185. The start key may then be released and the circuit through the magnet M3 will be maintained from the line 178 through wire 179, contacts K3, con acts CFCl, wire 180, contacts TS7, magnet M3, wire 180a, contacts 183, card lever UCL, contacts 184, wire 181 back to the line 182.

Between the passage of the cards the card lever UCL isreleased so that contacts 183, 184 open and contacts 185 become closed. During this interval the CB1 cam permits its contacts to be closed so that the current will flow around the .contacts 183184 at this time and thus continue the circuit. While the cards are holding the contacts 183, 184 closed the CB1 contacts are held open by their cam. If cards fail to feed the circuit will be broken, deenergizing the card feed clutch and thus stopping the 'card feed mechanism. If printing is to be effected under control of the cards being fed through the machine the switch S4 will be closed so that when the start key is depressed a circuit will also be established through the printing clutch M2. This circuit is as follows: from the line 178 through wire 179, contacts K3, contacts K1, contacts LCLl as soon as the LCL1 card lever is closed by the cards that are now being fed through the machine, then through switch S4, printing clutch j;

magnet M2, wire 186 back to the line 182. The

energization of the magnet M2 as we have seen causes operation of thetype bars 101 and asso ciated'mechanism. After the start key is released the circuit continues through the contacts CF01. If cards fail to feed the LCLl card lever will permit its contacts to open, breaking the circuit through the magnet M2. The stopp e of the card feed mechanism by deenergization of magnet M3 also causes opening of the contacts CFCl so that the circuit is broken at two points. While the machine is in operationand cards are being fed the machine may be stopped at any time by depression of the stop key 187 to open the contacts K3. This will break the circuit through the card feed clutch' and the printing clutch. The motor 176 will, of course, continue. to operate until the switch 175 is opened. 1

Accumulating and listing As the cards are fed through the machine they will pass between the brushes 36 and the common contact C5. Each of the brushes 36 cooperates withone of the columns of the index points on the card so that as the card passes under the brushes these points pass one after the other under the brushes 36. Where a perforation appears at an index point in a column the corresponding brush 36 will reach through the perforation at that particular time and close the circuit through the. cornmoncontactor C5. The circuit. is as. follows: from the line 182, through the LCL2 contacts which are closed by the cards being fed, then through the contacts CB3 which are closed during the time that a card is passing under the brushes and are opened by their cam for a short period when 110 card is under the brushes. The circuit than continues through the common brush 188 to the common contactor'CB, through the perforation in the card to brush 36,- wire 190, to the corresponding plug socket 191, plug wire 192, plug socket 193. From here the circuit splits, continuing in one direction through wire 194, contacts 1190 now closed, magnet 100, common contaictor C7A, wire 195, contacts DBTl normally closed, wire 196 back to the line 178. The magnet 100 as shown in Fig. 2 controls the printing type bar 101 to stop the type elements 102 in position with respect to the platen 103. The position of the perforation in the card closing the circuit through the brush 36 determines by the time of energization, which type element 102 shall be stopped in printing position. This type element represents the value represented by the position of the perforation in the card. Returning to the plug socket 193 where the circuit splits, the other branch of the circuit continues through contacts 197 normally closed, through magnet 37, wire 198, back to the line. 178.

The energization of magnet 37 as we have seen in connection with Fig. 3 causes the natural wheel of the accumulator to commence to rotate and at the same time causes the complementary wheel to stop rotating for the-same duration of time. The energization of magnet 37 takes place at a time depending upon the positionof the perforations in the particularcolumn. The rotation.

of the natural accumulating wheel continues from this time to theend of .the accumulating cycle at which time the parts are declutchcd and the by a different column on the card and each-op.'-,

erates independentlyof the other'except of course that carrying must be efiected'from one order to the next higher order.

previously described. Presuming the accumulator of the units order to have passed from nine' Carrying is effected ,at' the end of each accumulating operation under control of the setting of the brushes 60-61 as to or through its zero position it will be necessary to carry one to the accumulator wheel of the next higher order. The passing of the \units wheel to the zero position causes the contact 60 to be set in position to be engaged by the segment 63 at the carrying time of the cycle. At this time the contacts CR6 and CR7 are closed momentarily and the contacts CB2 are also closed so that a circuit is closed from the line 182 through wire 199, contacts CR6, CR7, CB2, wire 200, common conductor C2, brush 60, contact ring 62, brush 64, wire 201, the magnet 37 of the next higher order, the common contactor C1, wire 198 back to the other side of the line 178.

The energization of this magnet 37 will cause th's particular accumulator wheel to commence rotating once more. As soon as the value 1 has been accumulated the cam point 473 (Fig. 6) will cause .the accumulator wheel to stop rotating. Carry from any of the other orders, is of course, efiected in the same manner. If the accumulator of the tens order is standing at nine during the carrying time its contact brush 61 will be in position to engage the segment 71 'during the carrying time of the cycle. wheel of the tens order is to .receive one by energization of its magnet 37 the circuit from the brush 60 of the units order through ring 62 to the brush 64 and to the magnet of the tens order also branches from the brush 64 and passes to the brush 61 of-the tens order which is now engaged by its*segment 71,.to the ring 62, then to the brush 64 of the tensorder and to the magnet 37 of the hundreds order. Thus if the tens order is standing at nine and one is carried into the wheel of that order so as to cause it to move to its zero position, one will also be carried through the tens order into the hundreds order at the same time. In Fig.20, six accumulator wheels are shown. All

Thus, if the accumulator six of these wheels may be used together as a Totaling Presuming that the machine has'been used for ordinary accumulating eitherwith the plug connection 203 in position to close the circuit so as to use all of the accumulator units as one accumulator or with the plug connection 203 omitted so as to use the accumulator units as two separate accumulators, a total may be, taken by'depressing the total key 205 (Fig. 19).

contacts CR1, total set up magnet 72, contacts K4, contacts 185, wire 181 and back to the line 182. The energi'zation of magnet 72 as shown in Fig. 12 sets all of the total contacts 119 andcertain other contacts designatedas TS contacts in position for a totaling operation. The contacts of magnets 37 by a circuitfrom line 182, through wire 199, contacts CR4, CR5. contacts TS4, bars C3 and C3a, contacts DBTlc in the credit orders,

contacts 119b,-cable 319, magnets 37, conductor 01, and wire 198 to line 178. The contacts TS6 V This sets up a circuit from the line 178 through wire 179, wire 2061,

TS'4 are closed in readiness for the .energization 5 are thus closed setting up a circuit through the 'line 182 through wire 199, contacts CR2, CR3 at the proper time in the cycle of the machine, contacts TS5 now closed, contacts DBT2 normally closed, wire 206, common contactor C6A, contacts 99 at the moment they are closed by the cam projection 98, cable 207, contacts 119a now closed, printing magnet 100, common contactor C7a, wire 195, wire 196 back to the line 178. The time of closing of contacts 99 depends upon the value contained in the accumulator wheel and this in turn determines the time of energization of the printing magnet 100 which in turn selects the printing type 102 to print the value represented by the accumulator wheel.

If the accumulator is split into two parts and one part is being used to accumulate debit amounts and the other part is used to accumulate credit amounts, assuming that three debit amounts had been accumulated and three credit amounts had been accumulated and printed as in Fig. 1'7, the totals of the amounts will be printed as at 208 and 209. Where it is desired to ascertain the difference between the debit and credit amounts and to determine whether the difference is on the debit or credit side a further operation is necessary. The amounts contained in the accumulators will have to be preserved. To take a balance total the balance key 2091 is depressed.

This closes a circuit from the line 178 through magnet 210, wire 211, contacts CR8, contacts BKl, wire 212 back to the line 182. The energization of magnet 210 attracts the armature latch 213, releasing the bar 214 and permitting its spring to lower it to its lowermost position. At-

tached to the bar 214 is a balance transfer switch member 215 having contacts segments 216 adapted to bridge contacts BT1, BT2, BT3 and BT4. In its lowermost position the balance transfer switch closes the contacts BT1. During this cycle of operation of the machine a circuit is set up from the line 178 through contacts CR11, magnet 217, contacts BT1, wire 218, wire 212, back to the line 182. Magnet 217 attracts its armature 219 releasing the arm 220 permitting it under the action of its spring to move the contact bar 221 to close the contacts DCTIA, and DOT. During this cycle the following circuit will be established:

from the line 182, through wire 199, contacts CR2 and CR3, wire 222, contacts DCT, common contactor C11, contacts 224, contacts DCTlA,

cable 223, wire 201a magnet 37, wire 198 back to the line 178.

The contacts 224 are closed by a projection 225 carried by a cam disk 226 fixed with respect to the complement wheel 32. The time of closing of contacts 224 will dependupon the value contained in the complement wheels 32. Thus the magnets 37 will be energized so as to cause the complements contained in the debit complement wheels to be added into the natural credit wheels.

This operation is represented in Figs. 13 and 14 'where the complement in the debit counter is the end of this cycle a cam CRX which is constantly running raises the pawl 227. This in turn raises the balance transfer switch element 215 one notch. The contacts BT1 will now be open and contacts BT2 closed. During the next cycle the contacts CR9 will closeto test the condition of the contacts TB2 If the value standing in the accumulator wheel of this particular order is other than nine, contacts TB2 will be closed. In this case one will be carried to the accumulator wheel of the units order of the credit accumulator. In other words, referring to Fig. 14, the accumulator 'wheel of the highest order in the credit accumulator contains a zero, this being so, one will be added to the accumulator wheel of the units order in this same accumulator so that the accumulator will then contain a value 460. The circuit is as follows: from the line .'182, through wire 212, wire 218, wire 228, concam CRX, opening contacts BT2, and closing ccntacs BT3 and BT4. The contacts CR10 then close at their proper time to test the condition of the contacts T131 through the following circuit: from the line 178 through contacts CR10, magnet 229, contacts BT3, wire 230, contacts TB1, wire 228, wire 218, wire 212, to the line 182. The contacts CR1 during this same cycle will also close a circuit through the total set up magnet 72 as follows: from line-178 through wire 179, wire 2061, contacts CR1, magnet 72, contacts BT4, wire 231, wire 218, wire 212 to the line 182. ,The energization of the magnet 72 sets the various contacts including contacts 119 in position for a total cycle. If the contacts TBl are found open the balance total will be taken from the natural accumulator wheels of the credit accumulators through the following circuit: from the line 182 through wire 199, contacts CR2 and CR3, contacts TS5, contacts DBT2, wire 206, contacts 99, cable 207, contacts 119a, magnet 100, and back to the line 178. This will print the balance total of 460 in the credit column in Figs. 17 as shown, indicating that the difference between the debit and credit amounts is 460 and is on the credit side. If the value contained in the accumulator wheel of the highest order in the credit accumulator is 9 contacts TBl will be closed. Thus when the contacts CR10 are closed a circuit will be set up through magnet 229 as pointed out. The energization of magnet 229 causes the armature 232 to release the arm 233 so that the latter will be actuated by its spring to shift the bar 234, reversing the condition of contacts DBTlA and DBTlB.

The total circuit will then be as follows: from the line 182, through wire 199, contacts CR2 and CR3, TS5, DBT3, common contactor C11A, contacts 224 controlled by the credit accumulator complementary wheels, cable 235, contacts DBTlB now closed, contacts 119a also closed, printing magnet 100 and back to the line 178. It will be noted that in this case the printing magnets energized are those which control the printing on the debit side so that as indicated in Fig. 18, the balance of 460 is printed-at the foot of the debit column. The data contained on the list sheet in Fig. 18 is obtained by reversing the figures accumulated in Figs. 13 and 14. Thus in being in position to represent zero.

Fig. .15 three numbers are accumulated on the debit side totaling 1918 and three numbers are accumulated on the credit side totaling 1458. In this instance the value contained in the'complement wheels on the debit side is 98081. This amount is added to the total 1458 contained in the natural wheels in the credit accumulators. The amount standing in the latter accumulators is then 99539. There being a 9 in the accumulator wheel of the highest 'order the contacts TBl were found closed. Thus there was no carry into the accumulator wheel of the lowest order.

this instance also the changingof the conditions of the contacts DBTlA and DBTlB causes the amount standing in the complement wheels of the credit accumulators to be printed on the debit side as in Fig. 13.

Normally when the machine is set for totaling the link 83d actuates the latch '83e to re lease the grooved shaft 90 permitting it to release the arm 44a. This in turn removes the tension from the spring 41 so that when a total is taken the accumulator wheels will be restored to their normal positions the natural wheel 31 Thus in printing the totals at 208 and 209 (Fig. 17) the accumulators would normally be restored to zero ready for a new accumulating operation.- In order to print the balance or the difference between the two totals as described, it is necessary to retain the totals in the accumulators after they have been printed at 208 and 209. This may be done by latching the latch 83c in the position of Fig. 2 so that when the machine is set up for totaling it will not release the shaft 90 until the balance is printed. For this purpose a latch 240 (Fig. 2) may be provided. This latch cooperates with a projection 241 on the latch arm 83c and is held in position by a spring 242. Thus when the total magnet 72 is ener gized and link 83d is raised the spring 243 will yield and the latch 240 will prevent the shaft 90 from being released. Now when the totals are printed the accumulator wheels will pass through their zero positions back to the position from which they started. This will restore them to the positions representing the data which they contained before printing the totals. Later when the balance ;key 2091 is depressed and contacts,

CR8 close energizing magnet 210 the magnet 244 will also be energized. This will actuate the latch 240 so as to release the projection'241'and thus permit the spring 243 to rock the latch 83c out of cooperation with arm 89.

When the armature latch 240 is depressed an arm 245 will cooperate with a projection 246 to hold the latch 240 down. When the arm- 89 raised it will engage rear projection of arm 245 rocking it against the action of its spring to release the latch 240. The energization of magnet 244 takes place at the same time that the balance transfer switch member 215 is low-' ered. At this time the total magnet 72 is not energized and the arm 245 serves to hold the latch 240 down until the total magnet is energized at a later cycle through the switch member 215. Then when'the link 83d is raised the latch 83c will release the arm 89 to permit a shaft 90 to be rocked. When the arm 89 is raised 89fis restored to its lowermost position and the contacts to open. The contacts BKl on the other hand are latched in closed position by a latch 251 which is actuated by a constantly running cam CRW which causes the contacts to open at a'predeterm-ined time- This is The contacts DBT2 which are normally closed are controlled by the. switch bar 234 so as to be opened when the magnet 229 is energized.

At this time the contacts DBT3 will be closed.

Both of these sets of contacts will be restored to normal positions when the arm 233 is restoredby its cam.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification it will be understood that various omissions and substitutions and changes in the form and details of-the device illustrated and in its opera-1- tion may be made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims:

I claim:

1. In an accumulating device, a pair of accumulating wheels, driving means, a differential connection between said driving means and said wheels for moving both wheels in the same direction, means for locking said wheels against operation, and means for controlling said looking means so that an amount is added on one of said wheels and the complement of said amount is added on the other wheel.

2. In an accumulating device, a pair of accumulating wheels, driving means, a difierential connection between said driving means and said accumulating wheels for moving both wheels in the same direction through complementary amounts, perforated record controlled means for locking one of said wheels against operation, and means under control of said locking means for adapting the other wheel to accumulate complements. 4

3. In an. accounting device, ,an accumulator wheel adapted to normally register zero, a second accumulator wheel adapted to normally register nine, means for adding-values to the first said accumulating wheel'by advancing the same and means for moving said second named wheel in the same direction as the first named wheel but causing said second named wheel to drop back of its normal position relative to the first named 'wheeha distance equal to the value of the number added to said first named wheel.

4. In an accumulating device, apair of differentially driven accumulating wheels, locking means adapted to normally look one of said wheels against rotation while permitting the other to rotate, record controlled means for reversing the operation of said locking means so that the normally locked'wheel may rotate in the same direction to add an amount simultaneous with the locking and setting back of the other wheel to add the complement therein, and means controlled by the machine at a predetermined time in the cycle of operation thereof for restorin the cycle of operation thereof for restoring said locking means to normal condition and means for taking a total from said accumulator at a predetermined time in the operation of the machine.

6. In a record controlled accounting machine,

a plurality of accumulators adapted to accumulate numbers and complements thereof, means for adding the complement contained in one of the accumulators into the other accumulator and means for printing a total under control-of said other accumulator including means for causing said total to be selectively printed in one or another of a plurality of columns on a record sheet.

7. In an accounting machine, a pair of accumulating devices, means for adding numbers into said devices, means .for transferring a number from one of said devices to the other, means controlled by one of the accumulating elements of said other device for causing one to be added to the element of the lowest order in said other device when the value contained in the said'first named element is zero.

8. In an accounting machine, a plurality oi accumulators adapted to accumulate numbers and complements thereof, means for automatically selecting one accumulator, means for adding the complement contained in an accumulator into the selected accumulator, and means for taking a total under control of the selected accumulator.

9. An accounting machine having a plurality of accumulating devices, one of said devices having means for accumulating debit numbers and complements thereof, another of said devices having means for accumulating credit numbers and complements thereof, means for adding the complement contained in one of said accumulatorsing a balance under control of said other accumulator in one of two positions. on a record sheet to indicate whether the balance isa debit.

or a credit.

10. In an accumulating device, a pair of accumulating wheels, driving means, a differential connection between said driving means and said wheels for moving the wheels in the same direction, means for normally locking one of the wheels while the other wheel is free to rotate, means for difierentially locking the normally free wheel and releasing the normally locked wheel to add an amount therein while the normally free wheel is held back to accumulate the complement of said amount, and means, controlled by the operation of the machine at a predetermined time in the cycle of operation for unlocking the normally free wheel and for locking the normally locked wheel.

11. In an accumulating device, a pair of accumulating wheels, driving means, a differential connection between said driving means and said wheels for adjusting one wheel an amount complementary to the adjustment of the other Wheel, means for alternately locking said wheels against operation, and means for controlling said locking means so that amounts are added and totalled on one of said wheels and the complements of said amounts are added and totalled on the other wheel.

12. In .an accumulating device, a pair of accumulating wheels, driving means, a differential connection between said driving means and said wheels for adjusting one wheel an amount complementary to the adjustment of the other wheel. means for alternately locking said wheels against operation, and means for controlling said locking means so that amounts are totalled on one wheel simultaneous with the totalling of the complements of said amounts on the other wheel.

13. In an accumulating device, a pair of accumulating wheels, driving means, a differential connection between said driving means and said accumulating wheels for moving said wheels through complementary amounts, perfo'ratedrec- 0rd controlled means for alternately locking and releasing said wheels so that an amount is added on one wheel and the complement of said amount is added on the other wheel.

- ALBERT W. MILLS.

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