US 2258204 A
Description (OCR text may contain errors)
Oct. 7, 1941. M. E. GOULD 2,258,204
ACCOUNTING MACHINE Filed March 12, 1940 3 Sheets-Sheet l @QQQQOQQQ Oct. 7, 1941. ULD. 2,258,204,
ACCOUNTING MACHINE Filed March 12, 1940 3 Sheets-Sheet 2 Oct. 7, 1941. GQULD 2,258,204
ACCOUNTING MACHINE Filed March 12, 1940 3 SheerLs-Sheet 3 Patented Oct. 7, 1941 UNITED STATES PATENT OFFICE" ACCOUNTING MACHINE Merle E. Gould, Greenwich, Coma, assignor to Photoelectric Business Machines, Inc., New York, N. Y., a corporation of Delaware Application March 12, 1940, Serial No. 323,499
The present application constitutes a continu- I ation in part of my co-pending application Serial No. 173,727, filed November 9, 1937.
'In the present invention provision is made whereby the data accumulating mechanism is arranged for speedy operation, so that itis adapted for use in an accounting machine controlled by photographic film records on which data are represented by photographic spots, which spots designate the value of the recorded data by their positions on the film records. The spots are analyzed by light rays which activate photocells disposed in predetermined coded positions, corresponding to the positions of the coded designations on the records, to control the entry control means of the data accumulating mechanism. In the electrically. controlled accounting machines, generally the practice is to operate the data accumulating mechanism in timed relationship with the movement of the records to effect differential displacements of the accumulating or adding elements.- This principle of operation is not readily applicabl to control remotely situated accumulating mechanisms. Therefore, further provision is made in the present invention whereby the operation of the accumulating mechanism is independent of the operating mechanism for feeding the records, consequently rendering it applicable for being controlled at remote locations by the record sens ing means.
It is well recognized that photographic films of this sort customarily travel at high speed; therefore in any machine which involves the rapid entry of successive value amounts, the time factor of taking care of the carry-over operations from one adding wheel to the wheel of the next higher order, becomes important.
The tens carry operations in the usual accumulating mechanisms are efiected directly after each item entry, so that considerable time is consumed, in addition to the normal entr'y time,
to allow the carry operations, made necessary 55 by each item entry, to occur. This tens carrying time is reduced in the present invention by storing and counting the carry operations as they occur, but entering them into the proper denominational orders of the accumulating mechanism only after all items pertaining to a particular run, or operation of the machine, have been entered. The items can thus be entered as fast as the accumulating mechanism is capable of operating, no active machine time between successive item entries being necessary to allow for tens carry operations.
The arrangement of the accumulating mechanism for this delayed tens carry operation consists of an accumulator element for each denominational order, but with no mechanism for effecting tens carryoperations directly from each element to the element of the next higher order.
, Each denominational order element has a carryover storage system, "each comprising a settable switching means, associated therewith, one of which receivesa step of movement every time the associated accumulator element passes from 9 to 0." Each storing device, higher in a series, receives a step of movement every time the next lower device in the series passes from 9 to 0. These series of storing devices, therefore, count and store any number of tens carry operations, separately, for each denominational order. At the end of the machine rim, or when the desired number of items have been entered, the series of storing devices are read out and the stored carry units entered into the proper accumulator elements.
Other objects of the invention will be pointed out in the following description and claims and illustrated in theaccompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.
In the drawings:
Fig. 1 is an enlarged view of a fragmentary section of the photographic control element.
Fig. 2 is a diagrammatic view of the film'feeding and sensing means.
Fig. 3 is a perspective view showing'in simpli-' fled form several orders of the data accumulating mechanism.
Fig. 4 is a circuit diagram showing the wiring connections of the machine.
I Photographic control record the usual feed apertures l6, and consisting of individual areas or irames I I, which frames, when suitably recorded with data designations, form the individual control records.
In the use to which the invention has been by their relative positions on the individual records. In practice, and according to the embodiment shown, the data designations are shown on the record in an index point relationship, corresponding to the arrangement of the index perforations on the perforated cards of the well known Hollerith accounting system; that is, the difierential. positions of the spots [8 delineate the particular values of the data represented thereby. The differential positions are represented by the dotted lines I! in Fig. l. The diiferently positioned spots are formed in adjacent columns on the records, which columnar positions are indicated by the dotted lines 20 in Fig. 1. In this figure .it is noted, for example, that the designations, or spots l8 shown, represent the number 28.
Each individual record may be provided with spots in certain positions other than the data index point positions, just referred to, for purposes other than representing data.- For example, a control designation is shown in Fig. 1 to be represented by the spot 2| which is provided in a position located below the zero index point position and between the described columnar positions. The purpose of this, and other, control designations which may appear on the records will be understood as 'the description progresses.
Record feeding means In Fig. 2, suitable feeding means for the film I5, is shown diagrammatically, and represented ventional projection machine is one in which the film is momentarily arrested opposite the lens system 24, while exposed, and in which the film is obscured by a shutter as the individual film frames are positioned successively to the lens system. Such projection machines are well known, and for this reason it is believed unnecessary to give further detailed description of this mechanism. For example, a suitable machine for use in conjunction with the present invention is the standard. Bell 8: Howell film projection machine, the principles or operation of which are described in the U. 8. Patent #l,075,407.'
Record sensing meam Referring to Fig. 2, it is seen that in addition to the light source-23, and lens system 24, the
record sensing means includes a plurality of light responsive, or photoelectric means, such as the bank of photocells 21. The individual photocells are arranged in a coded position corresponding to the coded arrangement of the spots I. on
the film records; that is.'the photocells are ar ranged in separate columns, or orderaeach column including as many photocells as there are index point positions in each column of the individualfllmrecord. Inthepresentembodiment, ten photocells ar shown in each column to correspond to the ten index point positions for the data designations formed on the records. and are numbered accordingly, namely 9 to O.
The banks of photocells are suitably disposed with respect to the lens system 24, of the projection machine, so that, as the film is being passed therethrough, at each exposure of a frame IT, a pattern of light beams, corresponding to the coded spots formed thereon, will be projected upon the banks of photocells, whereby the photocells in certain coded positions will be activated by the beams, 0r rays, of light passing through the coded spots. It is understood that the light rays passing through the spots it, formed in certain coded positions will activate those photocells disposed in the corresponding coded positions in the banks of photocells. For example, the spots It, on the frame I1, in Fig. 1, represent the number "28 and, upon exposure of saidirame in the projector, the light rays passing therethrough ar projected upon the banks of photocells to activate those photocells disposed in the corresponding coded positions, namely 28" which are indicated by the darkened areas.
The position, or station, at which the film frames are arrested momentarily (opposite the lens system 24), will be referred to as the sensing station, or position. The circuits energized by the activated photocells will be described presently.
For the sake of simplicity, only several columns of photocells are shown. However. it is understood that-the number of columns of photocells provided should correspond to the number of columns of data designatiom provided on the film records. The photocells referred to, up to now, are those which are controlled by the data designations appearing on the individual records.
It is to be noted that additional photocells 2| and 29 are provided, for certain control purposes, which will be described later. It is only necessary to state, at this time, that the positions of the photocells 2| and 29, in the bank, correspond to the coded positions where a control designation may appear on the film records. For example, the photocell 22, is disposed in a coded position corresponding to the coded position where the control designation 2| may appear on the film records.
Data accumulating mechanism the said patent, there is shown the well known mechanism whereby, when a selected key is manually depressed, a gear section (element Ill inl 'ig.3ofthepatent)isrotated,throughapredetermined angle. to position a register wheel for indicating the digital value oi the depressed key. sincethistypeormechanismisoldand well known, it is believed that the following brief description of the accumulating mechanism will sumce, for those skilled in theart to understand the principles or operation employed in the present invention.
Each denominational order of the accumulating mechanism is provided with a common operating shaft 30, and a gear sector 3|, which is secured to the said shaft. A plurality of arms 3|a are fixed to and spaced on the shaft 30 in a spiral arrangement. A control solenoid 56 is associated with each arm 3|a, having a related plunger 56a adapted to engage a corresponding arm. The plungers 56a, for each order, are the same in length, as shown in the figure, but, due to the spiral arrangement of the arms 3|a, with respect to the plungers 56a, the different arms are rotated through different angles, upon selective energization of the related solenoids. The spirally arranged arms 3|a are disposed in the paths of the strokes of the related plungers 5811, but are engaged at different times during the strokes of the said plungers, due to the said arrangement of the arms on shaft 30. The plungers 55a each have the same limited extent of movement and the differential actuation of the shaft 30 and sector 3| is determined by th extent of the lost motion before an operative plunger engages and actuates its arm 3|a. For example, upon energization of the 1 solenoid, the shaft 30 will be rotated one unit; and upon energization of the 2 solenoid, the shaft 30 will be rotated two units, and so on.-
It is evident that, upon successive energization of the said solenoids, the gear sector 3| is rotated through different angles. in accordance with the selective and successive energization of the control solenoids. Rotation of the gear sector causes the associated order Wheel 35 to be displaced, or rotated, through corresponding angles, for instance, upon energization of the 1 solenoid, the shaft and sector 3| are rotated to advance the wheel one unit or step, thus effecting the entry of 1; and upon energization of the ,2 solenoid, the said shaft and sector are rotated to advance the wheel two units or steps, thus effecting the entry of 2, etc.
The arrangement for effecting advancement of the wheel 35, which is rotatably mounted on shaft 33, comprises a ratchet wheel 36, secured to shaft 33, and a cooperating pawl 34, which pawl is pivotally mounted on a mutilated gear 31. The said gear 31 is pinned to the wheel 35, so that, upon rotation of shaft 33,by means of the gearing 32, and sector 3|, the ratchet wheel 35 is rotated to drive the gear 31 and wheel 35, through the said cooperating pawl. In this manner, entry of the itemsor data can be made in each denominational order of the accumulating mechanism. Upon each item entry operation, the selected control solenoid is deenergized, permitting the sector 3|, shaft 30, and arms 3| a to be restored to the normal position, shown in Fig. 3, by the conventional means, shown in the aforementioned patent. This conventional means is shown herein in Fig. 3 as the spring attached to the sector 3|.
It was mentioned that transferring of the tens carry, from the related order to the next higher Gears 39 and 40 are also secured to shaft 48, the former being rotated a partial revolution by the tooth 38 of gear 31 whenever the wheel 35 passes from 9 to 0. The ratio of gears 31 and 39, being such that each partial revolution of gear 39 comprises one-tenth of a revolution and is sufiicient to rotate the shaft 48 and advance the conducting arm 41 to engage the next adjacent contact 46 of the arcuate bank. Upon the completion of each half of a full revolution of gear 39, the gear 49 is arranged so that one of the teeth 4| engage the gear 42, secured to shaft 49,'to effect rotation of the gear 42 onetenth of a revolution, or one step. Gear 42, being secured to shaft 49, thereby causes the conducting arm 41 of storing device 44 to be advanced, to engage the next adjacent contact 46 of its arcuate bank. It is noted that each contact of each device represents a digital value, which is indicated accordingly in Fig. 4. It will be noted that each one-half revolution of gear 39 and related conducting arm 41 is representative of ten stored carries and that during each one-half revolution, the conducting arm 41 sweeps across each of the contacts 46.
It should now be understood that each time successive item entries are made, for example, in the units order, to cause the associated accumulator wheel 35 to pass from 9 to 0, indicating that a tens carry operation should be made, from the units order to the tens order, an entryof one is made into the carry storing device 43; and that for each tenth carry entry in the lower order storing device 43, an entry of one is made into the next higher order storing device 44, and so on. In this manner the tens carries are entered and stored in each of the storing devices described. In order to simplify the description, only two storing devices 43 and 44 are shown associated with the units order, and one storing device 45 is shown associated with the tens order of the accumulating mechanism, said device 45 being identical in structure and operation to the devices 43 and 44, just described.
Operation of the machine Referring now to Fig. 4, the operation of the machine will be described. It is to be understood from the description thus far that the term data accumulating mechanism or means refers to a plurality of the denominational orders, each order comprising the elements just described, and the one or more carry storing and counting devices, and associated control means, associated with each of the said orders.
In the machine, illustrated in the figures, two orders of photocells, and three orders of the accumulating mechanism are shown, and to simplify illustration of the invention, the machine is described as having a restricted data accumulating capacity, but it will be evident that the capacity of the machine may be enlarged to any desired capacity by employing additional orders of photocells and corresponding additional orders in the accumulator, just described, and connected in the machine similarly as the units shown in the present circuit diagram for the machine.
Now, let it be assumed that the projection machine is set into operation to feed continuously the photographic film, but as mentioned before, presenting the film frames intermittently to the sensing position, where the coded designations, appearing on the individual records or frames, permit the rays of light to pass 1813- I control,
through, momentarily, to activate only the photocells which are disposed in the coded positions corresponding to the coded positions of the data designations. It is assumed that the speed of operation of the projection machine is adjusted so that the individual film frames are presented to the sensing station at a rate at which the data accumulating mechanism is capable of manifesting the sensed data. It is assumed, further, that the individual frame, or record, presented momentarily to the sensing station bears data designations, or spots, representing the number 28, thus causing the 2 cell of the tens order and the 8 cell of the units order to be activated.
Due to the activation of the said cells, current is permitted to flow in the following circuits: grounded battery 50, normally closed switch 5|, conductor 52, the "8 photocell of the units order, conductor 53, the 8 solenoid 55 of the units order, conductor 51, switch 55 to ground 59, energizing said solenoid; the other circuit can be traced from grounded battery 50, to the switch the conducting arm 55, of the sequence switch 5i, conductor 52, the "2 cell of the tens order,
conductor 54, normally closed contacts 55, the 2 solenoid 55, conductor 51, switch 55 to ground 59, energizing the said solenoid. Energization of the said solenoids causes entries of 8 items to be made in the accumulator wheel 35 of the units order, and "2 items in the wheel 35 of the tens order, in the manner as described hereinabove. It is seen, therefore, that during the record sensing operations, the said photocells of each .order are activated selectively, in accordance with the data designations on the records to selectively, the energization of the related control solenoids of the corresponding order, thereby causing the sensed data to be entered into the accumulating mechanism accordingly.
In order to simplify the showing of the circuit connections in the wiring diagram in Fig. 4, the conventional amplifiers have not been shown connected in the individual photocell circuits. Since the conventional photocell controlled amplifiers are so well known, at this date, it is deemed sumcient to mention that the conventional type of amplifier can be used in each photocell circuit for amplifying the current flow directed to the related solenoids 55. In view of this disclosure, additional showing in the drawings is not deemed necessary, for those skilled in the art, to understand the principles of operation of the present invention.
Now, in order to describe briefly the method of reading out the stored carries, assume that, at the end of a machine run, '166 items are entered in the units order of the main accumulator, and 12 items in the tens order. The true total of these items is 286; however, at the end of the said machine run, before reading out the stored carries, the wheel 35 of the units order is standing at "5," the wheel 35 of the tens order at and the wheel 35 of the hundreds order at0,"
- so that the main accumulator shows the uncompleted total, 026. The conducting arms 41 of the carry-over storing devices 43 and 44 of the units order are engaging the 6 and "1 contacts of the respective arcuate bank of contacts 45, and the conducting arm 41 of the device 45 of the tens order is engaging the 1" contact of the related contacts 45.
During the read out operations to be described, the normally closed contacts 51 and switch 55 areopened. The=flrst step, in reading out the stored carries, comprises manually positioning 5|, to engage the contact 52, thus establishing a circuit from grounded battery 50 to conductor 54, conducting arm 55, contact 52, conductors 55 and 55 to the grounded coil of relay 51, energizing said relay. Upon energization of relay 51, the associated contacts 55 are opened, and contacts 55, 55, and 15 are closed. Since the contacts 55, which are now closed, are connected to the common conductor 55, the circuit from grounded battery 55, just traced, is continued to include contacts 55, conducting arm 41 of device 43, the 6 contact of the associated bank 45, conductor 11, the "6 solenoid 55 of the tens orders, con ductors 51 and 12, contacts 55 to ground, energizing said solenoid, and effecting the entry of "6" in the wheel 35 of the tens order, thus causing the said wheel to stand at "8. Also, sincecontacts 15 (now closed) are connected to the common conductor 55, the circuit from grounded battery 55,1ust referred to, is extended to include the said contacts 15, conducting arm 41 of the device 44, contact "1" of the associated bank of contacts 45, conductors 13 and 14, the 1" solenoid 55 of the hundreds group, conductors 51 and '12, contacts 55 to ground, energizing said solenoid, and effecting the entry of l in the wheel 35 of the hundreds order, thus causing the said wheel to stand at 1.
It is obvious that the reading out of these amounts 5 and i out of the tens order and the hundreds respectively of the main accumulator, takes place simultaneously for the two orders, that is, the tens and the hundreds.
Whenever this reading out from the units storage, for example, into the tens order (of the main accumulator) should move this tens wheel from 9 through 0, then a carry-over would be due to go into the hundreds wheel of the main accumulator; but there being no direct carry-over between these two wheels, this carry-over is merely stored-up in the storage system for the tens order wheel so that there would be no confusion or loss of this carry-over -in case the hundreds wheel was at that time moving under the carry-over from the unit storage system.
The next step in the present reading out operation comprises positioning the conducting arm 50 to engage the contact 53, thus connecting the grounded battery 55, by means of conductor 54, conducting arm 50, and contact 55 to the common conductor 15. The grounded coil of relay 15 is connected directly to 'the said common conductor 15, thereby causing the relay to be energized, to close the associated contacts 11. The said conductor 15 is also connected to the conducting arm 41 of the storing device 45 by conductor 15, thereby permitting current from the grounded battery 50 to fiow in the following circuit, comprising the 1 contact of the bank of contacts 45 of the tens order, which is engaged by the related conducting arm 41, conductor 14, the 1" solenoid 55 of the hundreds order, conductor 51 and contact 11 to ground, energizing said solenoid and effecting the entry of l in the wheel 35sof the hundreds order, thus causing the said wheel to stand at 2."
It is seen now, upon completion of the tens carry read out operation, that the said accumulator wheels 35 are standing at 2," "8," and 6, to represent the true total of the items, or data sensed on the individual records. Upon restoration of the conducting arm 55 to the normal position shown in Fig. 4, closure of switches 5| and 55, resetting of the conducting arms 41 of the devices 43, H, and 45 to zero, and resetting the accumulator wheels 45 to zero (which operations are assumed to be manually operated for the present description), the machine is conditioned for sensing other groups of records, and controlling the accumulating mechanism accordingly to effect entries of the data therein, exactly as described hereinabove.
It was mentioned before that provision is made for selecting predetermined accumulating mechanisms, from a plurality, upon sensing certain control designations, recorded on the records, and then efi'ecting entry of the related data on the records into the selected mechanism or mechanisms. A suitable arrangement for effecting this type of operation will now be described.
Referring now to Fig. 4, a second accumulating mechanism is shown diagrammatically and designated ACC #2, which is similar to the accumulating mechanism described 'hereinabove and designated ACC #1 in Fig. 4. The same ref,- erence characters, provided with the suffix a, are employed for designating the elements of the mechanism ACC #2, similar to the elements of the mechanism ACC #1.
For the present description, assume that the individual records are provided with a control designation 2|, in addition to the data designations l8 (see Fig. 1). It was pointed out that the said control designations control the activation of photocell 28. Assume also thatswitch 58 is'opened during the operations to be described.
Upon sensing the said designations disposed I on the individual records, it is to be noted that the activation of the photocells 21, upon sensing the data designations, is not efiective at this time to effect energization of the related solenoids 58, due to the fact that the common conductor 51 is not connected to ground. However, a ground connection to the said common conductor is made upon energization of relay 80, the energization of which is under control of photocell 28. Upon activation of the said photocell 28, the following circuit is established: from grounded batterylill to switch 5|,conductor 52, photocell 28, re lay 80, conductor 84, normally closed contacts 8| to ground 83, energizing said relay. The contacts 8| and 82 of relay 80 are of the make before brea type. Therefore, it is seen that ground 82 is connected to contacts 82 before contacts 8| are opened. Upon closure of contacts 82, and
connection of ground 88 to conductor 51, it is evident that the solenoids 55 of the various orders of ACC #1 can now be energized in accordance with the activated cells 21. A circuit for one order can be traced as follows: grounded battery 58, switch 5|, conductor 52, photocell 21 of the units order,,for example, related solenoid 58, conductor 51, contacts 82 to ground 88, energizing the said solenoid. The adjustment of contacts II and 82 is such that contacts 8| are not opened until the selected solenoid 55 is sufliciently energized to render the associated plunger effective to position the related shaft 80.
Now assume that the records which are sensed are provided with control designations disposed so that the photocell 28 is activated whenever the individual records are presented to the sensing station. Relay 80a is then energized, each time the said control designation is sensed, by the circuit from grounded battery 50, switch 5|, photocell 29, relay 80a, contacts 8|a to ground "(1. Upon closure of contacts 82a, the said ground 83a is connected to conductor 51a thus permitting the selected solenoids 55a of the various orders of ACC #2 to be energized in accordance with the sensed data.
In the event the sensed records are providedwith a plurality of'said control designations to activate photocells 28 and 29, simultaneously, both relays 80 and 80a are energized to connect the grounds 88 and 83a, respectively, to the corresponding conductors 51 and 51a, thus controlling both ACC 1 and ACC #2 in accordance with the sensed data.
The carry storing devices 43a, 44a, and 45a of ing which is lacking the entry of the successive carry-overs. These carry-overs are stored up in a series of carry-over systems, there being one complete or multi-wheel storage device for each one of the denominational-order wheels of the main accumulator. That is, since these carryover devices do not receive the same rapid and differential actuations as is the case with the main accumulator, each of said devices comprises a plurality of denominational-order wheels wherein supplementary carry-over devices are provided from the lower order units to the next higher order wheels, there being ample time to effect these carry-overs.
By these mechanisms a rapid and continuous run of entries of value amounts may be made upon the main accumulator and any number of successive carry-overs can thus be stored up,
numbering if necessary into the hundreds or thousands, etc., without limitation, such number being limited only by the capacity of these storage wheels which register the numbers added thereon as in any ordinary counter.
Then at the end of the continuous run of amount entries, the read-out mechanisms are operated to bring the main accumulator reading to its correct final reading. These read-out mechanisms are operated in sequence, first the storage device for the unit wheel of the main counter, then the carry-over storage device for the hundreds wheel of the main counter, .and so on to complete in sequence the reading out for all of the storage devices.
If in this process, as above explained, oneof the wheels of the main counter passes through its position from 9 to 0, its corresponding carryover system is actuated to add 1 thereon, but
this carry-over is not lost, because it is then' properly entered when the next succeeding storage device is read out. ""In this way, by the sequential oper'ation referred to, all of the storage carry-over devices are read out one after the other, whereby the main accumulator is brought to a correct final reading of the total of the continuous run of amount entries.
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 variousomissions and substitutions and changes in the form and details of the device illustrated and in its operation 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.
What is claimed is:
1. In an accounting machine, in combination, an accumulator comprising a plurality of main denominational-order wheels; actuators tor efi'ecting differential value movements of said accumulator wheels; denominational setting elements for controlling the said actuators; carryover storage devices for each of said main denominational-order wheels, each of said devices comprising a plurality of settable denominational-order storage units and having supplementary carry-over devices between lower order storage units and next higher order units, whereany accumulator wheel during a continuous run of entries of amounts in the main accumulator; means on each main denominational-order wheel for causing'a unit advance of the related carry- 4 2. In an accounting machine, in combination, an accumulator comprising a plurality of main denominational-order elements; means for e1- fecting-entries in said accumulator;' carry-over storage devices for each of said main denominational-order elements, each of said devices comprising a plurality of settable denominational-order storage units and having supplementary carry-over devices between lower order storage units and next higher order storage units,
whereby to store up any number or carry-overs by to store up any number of carry-overs from 1 over storage device when said wheel passes from 9 to 0; and read-out mechanism for transferring in sequence, first from all of the units of the storage device for the lowest order to the wheels of higher order in the main accumulator, then from all o1 the units of the storage device for the next order to the wheels of higher denominational order in the main accumulator whereby to bring the main accumulator to a correct final reading 01 the total of the said continuous run of amount entries.
from any accumulator wheel during a continuous run of entries in the main accumulator; means on each main denominational-order element for causing a unit advance or the related carry-over storage'device when said element passes from 9 to 0; and read-out mechanism for transferring in sequence, first from all of the units of the storage device for the lowest order to the elements of higher order in the main accumulator, then from all oi. the units of the storage device for the next order to the elements of higher denominational order in the main accumulator whereby to bring the main accumulator to a correct final reading of the total of the said continuous run 0! entries.
3. In an accounting machine, the combination set forth in claim 1, wherein the read-out mechanisms comprise a plurality oi electromagnetic devices with circuits connected therewith for differentially actuating the corresponding next higher order wheels of the main accumulator. mm E. GOUID.