US2274803A - Calculating machine - Google Patents

Description

March 3, 1942. R, L. MULLER CALCULATING MACHINE:

5 sheets-sheet 1 Filed Dec. l, 1937 v March3, 1942. R. l.. MULLER CALCULATING MACHINE Filed Dec. l, 1937r 5 Sheets-Sheet 2 INVENTOR Rolfe/ L. //ef www M A TTORNE YS y March 3, 1942. y R L MULLER 2,274,803

GALCULATING MACHINE Filed Dec. l, [1937 5 Sheets-Sheet 3 INVENTOR A TTORNEYS March 3, 1942.

R. 1 MULLER CALCULATING MACHINE 5 Sheets-Sheet 4 Filed Dec. l, 1937 INVENTOR Polfer L.. 77E/ler ATTORNEYS Wwf/@MMM March 3, 1942. R L, MULLER 2,274,803

CALCULATING MACHINE Filed Deo. l, 1957 5 Sheets-Sheet 5 [N VENTOR Rolrer L m//er that overdraws the account.

vention has been devised to solve this problem.

Patented Mar. 3, 194.2

UNITED STATES i PATENT OFFICE cALoULa'rING Macrmm nobel-t L. Muller, peut, Mich., amgnor to Machine Company, Detroit, Mich., a corporation of Michigan Application December 1, 1937, Serial No. 177,435

` (ci. zas-so) `the balancel or total column, or he can ma- Burroughl Adding 3 Claims.

This invention relates to calculating machines and more particularly to a bookkeeping type of calculating machine for printing and making the necessary bookkeeping calculations and entries for the different columns of a bookkeeping form.

One type of work for which these machines are used is that of posting customers accounts in banks. This work is so voluminous in the large banks that a continual demand arises for greater speed and more automatic operation. Posting of the account of a customer may involve the posting of one or several checks only; or the posting of a deposit only; or the posting of one or more checks and a deposit. After each type of post,

ing a new balance must be obtained. These variations in posting require that the machine be appropriately conditioned for'addition, for subtraction, and for total taking, andthe various itemsmust be printed in the proper co1- umns.- But, no matter what the character of the account to be posted, as little time as possible must be used in the manipulation of the machine and in its automatic operation.`l

Another factor that enters is that the banks do not want any of their customers to overdraw more, it should take place before the bookkeeping operations have gone very far because the banks do not ordinarily carry overdrawn accounts. Instead, they d0 not accept the check 'Ihe present in- The general object of the invention is to provide an improved automatic calculating machine.

A more particular object is 'to provide a machine in which totals are taken automatically and one in which, when the total is negative, automatic operation of the machine will be stopped before the total is taken, thereby notifying the operator that a negative total exists before a new balance is taken. y

kAnother object is to provide an improved calculating machine in which, when the operator manipulates the motor bar to initiate a' machine cycle for the posting of a check, he may do so in such a way as to either cause the paper carriage, after said check has been subtracted, to move to the deposit column nWhere the machine will be automatically pre-conditioned for total taking and a total then taken automatically in 55 conditioned, is given a cycle of operation during nipulate the bar in a manner to cause the carriage to move to the deposit" column where it as well as the automatic operation of the machinel will stop to permit the entry of a deposit.

Other and further objects and their resultant advantages will be apparent from the following description given in connection with the drawings in Whichz' Figure 1 is a right side elevation of a machine embodying this invention, the machine elements being in normal position Fig. 2 is a partial rightside elevation illustrating the motor controls and associated mechanisms ,with th'e auxiliary motor bar latched down and with the machine .parts at the end of a forward machine stroke;

Fig. 3 is a fragmentary detail in side elevation of the auxiliary motor bar and associated parts iuustraung the auxiliary motor bar had downA in fully depressed position;

Fig. 4 is a fragmentary left side elevation or detail of the total key and portions of the negative total lock controls;

Fig. 5 is a fragmentary enlarged detail in side elevation of the automatic total-taking means illustrating the latter in tripped position, but prior to machine operation;

Fig. 6 is a diagrammatic illustration of four different types of transactions a machine embodying the principles oi this invention is capable of performing,

Fig. 7 is a left side elevation showing the subtract controlling mechanism of the machine to which the invention is applied.

Fig. 8 is a detail side elevation of one of the interlocks on the machine.

The illustrated embodiment of this invention for accomplishing the heretofore mentioned desired results is shown as applied to a Burroughs high keyboard machine of the type illustrated in many known patents, as, for example, the

Fasinski Patents No. 1,778,506 and No. 1,911,768, for which reason ythe general construction of the machine will be described only,very brieily, reference being had to the foregoing and other issued patents for further details of construction.

It will be obvious to those skilled in the art that the invention may be applied to other types of calculating machines.

General Construction A'lhe machine, which is'illustrated generally in Fig. 1, is of a type which, after it is properly which its various functions are performed. It may be cycled manually by means of a hand crank but most of the present day machines are provided with a power operated driving means that is actuated by an electric motor 22 (Fig. 1). This motor drives the machine through a normally disengaged clutch in the housing 24, which clutch vis connected through the necessary shafts, cranks and levers to the main drive shaft that, in turn, is suitably connected to other parts of the machine to operate them. The motor and clutch are normally controlled by the motor bar M which, when depressed, starts the motor and engages the clutch to cause said motor to give the machine a single cycle of operation. During the iirst half cycle, or forward stroke." oi' the machine the motor positively drives said machine and tensions the springs E3B. During the second half cycle, the motor drive simply moves so as not to interfere with the machine operation, the actual power being furnished by the springs i3l for said second half cycle or return stroke. The motor and its controis are described in detail in Vincent Patent No. 866,750, where, however, the motor is shown as a continuously running motor, The motor employed on the present day machine is a normally inactive motor whose circuit is closed by depression of said motor bar as disclosed in Bindschedler Patents Nos. 1,658,036 and 1,773,- 164.' Repeat machine cycles may be obtained by mechanism such as disclosed in Muller 1,397,774.

An amount indexing means is provided for enabling items or amounts to be indexed in the machine. This indexing'means comprises a plurality oi depressible amount keys I, ofwhich, in a bank machine, there are usually seventeen rows of nine keys each. When one of these keys is depressed, it rocks a bell crank 2 (Fig. 5) to set an index stop in the form of a wire 3 which arrests the corresponding actuator 4 in a position corresponding to the digital value of the key depressed. The actuator is carried on the forward end` of a pivoted lever 6, the rear end of which is shown in Fig. 1. Said rear end carries a plurality of type 8. At the beginning of a machine cycle, the actuators are normally released and they descend to differential positions. This also differentially positions the type and,

near the end of the first half of the machine The machine has a main add-subtract registering mechanism, sometimes called a crossfooter, which comprises a set of add pinions II meshing with a set of subtract pinions I2. Said registering mechanism is of the tumbling type; that is, it may be tumbled or rocked from an add position in which the add pinions are in active position for connection with the actuators to a subtract position where the subtract pinions are in active position, and vice versa. Said registering mechanism is normally in add position, but an add-subtract controlmeans may be conditioned either manuallly or automatically as described in Pasinski No. 1,778,506 so that said registering mechanism will assume a subtract position. Said mechanism is best illustrated in Fig. 7. It includes a subtract lever I4 which is used when the machine is to be conditioned for subtraction manually. For automatic control, the carriage has a cam roll I4* which, when the carriage reaches a predetermined position, rocks a cam lever I4h that is connected through link I 4C to the subtract lever I4. When the subtract lever is moved forward either manually or automatically, it raises a link I4d that lifts the rear end of a pitman I 4'. 'I'his places a shoulder I4f in the path of a stud I4* cn a member I4k that is rocked during each machine cycle. Said stud I4' engages the shoulder I 4f during the first half of the machine cycle and pulls a pivoted lever I4'n clockwise which tumbles the crossfooter from add to subtract position. The machine is normally conditioned for addition owing to the fact that a spring I4r pulls rearward on a lever I4s connectedby a stud and slot connection I4t to the link I 4 that is connected to the subtract lever I4. After said subtract lever is moved to subtract position it is locked in such position during the machine cycle but, at the end of said cycle, it is released, whereupon the spring I4 pulls said lever to add position with the result that, during the first part of the next cycle, the crossfooter will be tumbled to add position unless the operator or the carriage again indexes said control means for subtraction.

A tens-transfer mechanism is associated with said lregistering mechanism, said tens-transfer mechanism being of a type employing an extra step of movement of the actuators and being capable of eiiecting both carries and borrows,n as described in Rinsche No. 1,172,484. It is operated by tens-transfer projections I6 and I1 (Fig. 1) on the add and subtract pinions.

A plurality of multiple registers I5 are provided as described in Fasinski No. 1,911,768, which registers may be selected automatically under the control of the paper carriage as described in said patent.

Printing is controlled so that it may occur in diiferent columns' on record material supported on the machine. For this purpose a columnarprinting control means is provided which is in the form of a traveling paper carriage 20, together with means for moving and controlling the movement of said carriage. The carriage is urged across the machine to the left, viewing the machine from the front, by a spring 'drum 2l (Fig. '7) and this movement, called movement in tabulating direction, is controlled by a tabulating mechanism, portions of which are shown in Fig. l, and which is described in Rinsche No. 1,516,685. Said mechanism includes a tab bar 23 (Fig. l) carrying a plurality of tab stops 26* which engage an abutment 26h. Normally, near the end of each machine cycle, the tab bar 28 is rocked clockwise (Fig. 1) which disengages the tab stop and the abutment. The carriage immediately starts to move, but the tab bar is released almost immediately after being rocked and it returns to normal so that the next tab stop hits the abutment and arrests the carriage. Thus, normally, the carriage moves from one columnar position to another near the end of each machine cycle. The carriage is returned across the machine by a power operated carriage return mechanlsm, of which a part is shown at 21 in Fig. 1 and which is described in detail in Rinsche No. 1,580,534.

The record material is held on the paper carriage by being held about the platen III. The paper carriage is of the front-feed type such as described in British Patent No. 382,623 oi' 1930.

i In this type of carriage, a record sheet is maintained about the platen for a long series of enare inserted and removed from time to time. To

facilitate such insertion and removal, a frontfeedmeans is provided which is automatically controlled and power operated so that it/will move from closed to open throat position and vice versa without any attention on the part of the operator. mechanism are shown at 28 and 28' in Fig. 1.

Both positive and true negative totals may be taken directly from the main registering mechanism or crossfooter," and, for thispurpose, the machine is provided with a total-taking control means usually governed by the total key T. When a positive total is taken, the registering mechanism must be in add position so that the total may be taken from the add pinions. When the total is negative, the'registering mechanism must be in subtract position for taking the total in order that said total may be taken directly from the subtract pinions. A suitable fugitive 1 mechanism is provided for insuring that the totals will be numerically correct, said mechanism being of the type illustrated in Rinsche No 1,172,484.

Portions of the front-feedv riage moves-"to the deposit column where it cycles automatically to change said crossfooter from subtract to add position. Thereafter, the carriage tabulates to the balance column where a total is automatically taken and printed. After the taking 'of this total, the carriage is automatif cally returned across the machine by the carriage Before describing the mechanism of the present i invention, .it will be helpful to first describe an example of the work that may be performed in order that the purpose of the various mechanisms may be more easily understood when they are later described.

Examples of work In Fig. 6, there are illustrated four typical transactions that may arise in bank posting, these transactions being lettered A, B, C and D.

Transaction A involves the posting of two checks against a customers account, leaving a positive balance. The transaction starts with the paper carriage in column 1 where the customers old balance is entered. This is called the pick-up column. The operator indexes the customers old balance of $100.00 by depressing the proper amount keys, after which he depresses the regular motor bar M to cause the machine to be given a cycle of operation. During this cycle, the amount of the old balance, $100.00, is entered positively in the crossfooter and, near the end of the cycle, the paper carriage tabulates to its column 2 position where a check is to be posted. Since the check must be subtracted, the machine must be in subtract condition and, in the present machine, the paper carriage automatically conditions themachine for subtraction. The check of $50.00 is then indexedon the amount keys and the. motor bar M is again depressed to cause a machine cycle during which the amount of the check, $50.00, is subtracted from the crossfooter Near the end of the cycle, the carriage tabulates to column 3, where the machine is again conditioned for subtraction by the carriage, this being a second check column. The amount of the second check, $25.00, is indexed on the amount keys. However, since no deposit is to be entered, there is no occasion for stopping the carriage in the deposit column. It can go directly to the balance column as far as the operator is concerned. At the end of the cycle in column 3, the machine will be in subtract condition. Since the next operation is the taking of a new balance, said machine should be in add condition because the balance is positive. In the present invention, the operator depresses the special motor bar M and releases it immediately which causes the machine to be given a cycle in column 3 where the check of $25.00 is subtracted from the crossfooter, after which the carreturn mechanism so that it'will be in position for a new transaction and, during this return, the front-,feed throat is opened so that the operator may remove the customers ledger sheet and insert another.

In a similar transaction involving the posting of only one check, the operator would depress the special motor bar M in column 2, which would cause the carriage to move directly to the deposit column where the same automatic operation would take place as above described.

Transaction B involves the posting of one check and the entry ofA one deposit, leaving a positive balance in the customers account. The oldbalance of $100.00 is indexed as before, the regular `motor bar M is depressed, the machine cycles to add the old balance of $100.00 in the crossfooter, and thecarriage moves to column 2 where the amount keys are depressed to enter the amount of the checkr $25.00. Since this transaction involves the entry of a deposit, the operator must have the carriage stop in the deposit column. Accordingly, with the present invention, he again depresses the special motor bar M', but

y he holds said bar depressed a short time, with the result that the paper carriage will move directly to the' deposit column and stop. The cycling of the machine will be stopped also. The operator then indexes the amount of the deposit, $50.00, on the amount keys and` depresses the regular motor bar M. The machine isy given a cycle of operation during which the crossfooter tumblesA from subtract to add position and the deposit of `$50.00 is added in said crossfooter. Near the end of the machine cycle. the carriage tabulates to the balance column where an automatic total-takingscycle occurs to take the new total, after which the carriage is returned across the machine and the throat opened as above described..

Transaction C involves the posting of a check that overdraws the customers account even though a depositr is also entered. 'I'he operations proceed as before, that is, the amount of the old balance, $100.00, is indexed in the pickup columnf and the regular motor bar is depressed, after whichthe carriage moves to the column '2 position. The check of $200.00 is then indexed and, since a deposit yis to be posted mext, the operator depresses the special` motor bar M' and holds it depressed a short time. The check of $200.00 is subtracted from the crossfooter dur ing the machine cycle, and the crossfooter goes negative. Near the end of the cycle, the carriage moves directly to the deposit column where it stops and no further cycling of the machine occurs., AThe operator then indexes the amount of the deposit, $25.00, on the amount keys and depresses the regular motor bar M, which causes a machine cycle during which the crossfooter changes from subtract to add position and the deposit of $25.00 is added in said crossfooten The carriage then moves to the balance column. Normally; as vabove described, when vthe carriage reaches the "balance column, a total is automatically taken, but, in transaction C, the crossfooter contains a negative total and, with the mechanism of the present invention, operation of the machine is stopped. The operator immediately knows that an overdraft has occurred. He may then stop the posting, strike out the entires and send 'the check for $200.00 through N. S. F. channels. If he desires to print the negative total, he may do so by moving the subtract lever to subtract position, and depressing the motor bar M to give the machine a spacing cycle to get the crossfooter to subtract position. He then depresses the total'key and causes a total taking cycle which will cause the negative total to be printed, after which the carriage will return across the machine and the throat be opened as before.

Transaction D involves the posting of a check that overdraws the customers account but no deposit is entered. 'I'he old balance of $100.00 is indexed on the amount keys in the pickup column, and the main motor bar M depressed, whereupon the machine cycles to add the balance in the crossfooter and the carriage moves to column 2. The amount of the check, $200.00, is indexed on the amount keys but, since the operator does not need to enter a deposit, he depresses the special motor bar M and releases it immediately. This causes a machine cycle during which the $200.00 is subtracted from the crossfooter which goes negative, after which the carriage moves directly to the deposit column where the machine is given a cycle automatically to change it to add condition, after which the carriage moves to the balance column, but, since the register contains a negative total, no automatic machine cycle occurs. The operator is again notified that an overdraft exists and he can obtain it, if he desires, as above explained.

The general structure of the machine and typical examples of work having been described, an explanation of the mechanism will now be given in more detail.

Control of carriage movement The special motor bar M' controls the movement of the paper carriage from the column in which said bar is depressed to the deposit co1- umn in the following manner:

Depression of the special motor bar lowers its stem 29 (Figs. 2 and 3) which is slidably supported at its upper end by a stud and slot connection 30 and which is pivoted at its lower end to a crank arm 3|. Pivoted at 34 on the stem 2l is a bell crank 33 which moves bodily downward with the stem as the same is lowered. The bell crank 33 is connected to the rear lever 36 of the main motor bar mechanism, said lever 36 being connected to another lever 31 and the two levers 33 and 3l being moved when the main motor bar M is depressed. A stud 32 carried on the stem 23 of the special motor bar M and engaging the upper edge of the forward arm of the bell crank 33 prevents the bell crank from rocking clockwise about its pivot 34 as the special motor bar M' is depressed so that the downward movement of the bell crank 33 as the special motor bar M is depressed causes the main motor bar M to be depressed at the same time. The bell crank 33 also serves as an interlock to prevent depression ofthe special motor bar M' while the main motor bar is in depressed position after being depressed alone. When the main motor bar is depressed alone, the bell crank 33 is rocked counterclockwise about its pivot 34 so that its lower arm moves over the upper surface of the square head oi' stud 30. If, then, an attempt is made tor depress the special motor bar M before the main motor bar M returns to normal, the stem Z3 cannot move downward because the end of the vertical arm of bell crank 33 is blocked by stud 30. The bell crank 33 acting in conjunction with the stud 30 serves to prevent immediate full restoration of the special motor bar M if the operator withdraws manual pressure from said motor bar immediately after depressing it. Whenthe special motor bar M is fully depressed, it causes the main motor bar M to be depressed sufficiently for the hook 10 pivoted on the lever 36 to be moved by its spring 'Il to engage under the stud 12 on the rearward portion of the lever 3l and latch the main motor bar in depressed position. If manual pressure is now removed from the special motor bar M', its spring 29l (Fig. 2) raises it together with the pivot 34 of the bell crank 33 somewhat. However, the latch 10, 12 prevents the rear end of the lever 36 from rising, and the bell crank 33 is, therefore, rocked counterclockwise about its pivot 34 until its lower arm engages against the stud 30 which then holds the special motor bar M in a position intermediate its fully 'depressed position and its fully restored position until the latch 10, 12 is tripped to permit both motor bars to restore fully. When the main motor bar is released, the special motor bar will be carried upward with it as it returns to normal.

Depression of the special motor bar M controls a skip-tabulating shaft 40 (Fig. 2), which is the same as the shaft |53 in Rinsche No. 1,580,534. When this shaft 40 is rocked slightly counterclockwise from the position of Fig. 1, it sets a skip-tab" mechanism that is then latched in position. As previously mentioned, during normal tabulating movements, the tab bar 26 is rocked near the end of a machine cycle to release the paper carriage and said bar immediately returns to normal to arrest the carriage in the next columnar position. But when the skip-tab" mechanism is set, as above mentioned, it acts, when the tab bar is rocked near the end of the machine cycle, to latch said tab bar against-return to normal. Accordingly, the carriage will continue to move until it arrives in a column where a carriage cam releases the tab bar, whereupon said tab bar returns to normal and arrests the carriage in the predetermined column. In the present invention, said controls are set to arrest the carriage in the deposit column.

Since, in some cases, the special motor bar M is depressed and immediately released and, in other cases, depressed and held down a short time, provision must be made for proper control of the skip-tab mechanism under both conditions.

Fixed to the shaft 40 is an arm 4| on whose free end is pivoted a pawl 42, spring urged clockwise by spring 42. In the normal position of the parts shown in Fig. l, the pawl limits against a stud 43 on an extension of the stem 23 of the special motor bar. The pawl 42 has an upstanding arm or finger 43 adapted, under certain conditions, to be positioned in the path of a stud 4l (Fig. 2) on the rear arm of a three-armed lever 43 pivoted at 43. The lower arm of this threearmed lever has a cam surface 5| positioned in the path of a stud 52 on the full-stroke sector 53. During a machine cycle, this full-stroke sector is rst rocked counterclockwise from the position of Fig. i and then returned clockwise. Near the aa'rasosl end of the nrst half c'ycle the stud I2 engaes the cam suri'ace Il and rocks the three-armed lever 42 clockwise, said lever 4I being returned clockwise by a spring during the early part of the last half cycle, or return stroke, of the machine.

The parts normally occupy the position shown in Fig. l and, if the machine is cycled by means vof 'the main motor bar M, the'three-armed lever moves away from pawl 42. The latter is then' rocked clockwise by its spring until it limits against the stud 4l on arm 4i, in which position,

the finger 46 is in the path of the stud 441 on the three-armed lever 42. As the machine is cycled, and near the end of the ilrst haii' cycle, the three-armed lever 42 is rocked clockwise whereupon stud 41 engages the linger 42 and rocks the arm 4i counterclockwise to set the skip-tab mechanism, the latter being then latched in set position. This does not cause the carriage to move immediately, but, when the tab bar is rocked near the end oi' the machine cycle, the skip-tab mechanism holds the tab bar and causes the carriage to move to the deposit column as above explained.

As the arm 4i rocks counterclockwise during the above operation, its tree end moves in an arc toward the rear and the parts finally move to the position of Fig.v2 where'the stud 42 occupies a slot in the pawl 42. During the second half of the cycle, the three-armed lever 42 returns to normal and stud 41 moves away from finger 42. When the skip-tab mechanism is released at the time the carriage arrives in the deposit column, arm 4i returns clockwise to normal position, at whichl time its tree end moves forward slightly in an arc so that the edge of the pawl 42 is again in the path of the stud 42 on the stem 22 of t-he motor bar M.v Accordingly, when the motor bar M returns to normal, the stud 42 engages pawl 42 and rocks it to the position of Fig. 1.

When the motor bar M' is depressed and manually held fully depressed a short time, that is, past the hali.' cycle, the parts operate as above explained and no further description is necessary. But, if the operator withdraws manual pressure from the special motor bar M' immediately after fully depressing it, the motor bar at once returns part way toward normal position, as already explained. To insure that the tlnger of the pawl 42 will be held in the path of the stud 41 whether the special motor bar is permitted to rise to its partially restored position or held in the fully depressed position slightly past the hall.' cycle of the general operating means, the arm 4I carries a stud 45 positioned within a broad notch in the upper rear edge oi' the pawl 42 to stop clockwise movement of the pawl 42 at the point where the end of the nger is squarely in the path oi the stud 41. Also, the lower edge of the rear portion of the pawl 42 is formed with a deep notch so that the counterclockwise movement of the arm 4i by the action of the stud 41 on the linger 42 will not be hindered by the pawl 42 striking the stud 42 whether the motor b ar stem 22 is in its partially restored position or its fully depressed position at the end of the half cycle. According- 5' ly, the skip-tab mechanism will'be properly set, both when the motor bar is depressed and held depressed for a time and when it is depressed and released immediately.

An interlock is provided for' preventing depression ot the special motor bar M in columns where said bar should not be depressed. For this purpose a lever 2l (Fig. 1i is pivoted `at 2l to the machine frame. This lever has an upper extension carrying a stud 22 adapted to engage a notch. in the stem 22 of the motor bar M. The other end of lever 60 ,has a lug 24 adapted tojbe engaged by a cam bar 26 mounted on the paper carriage. In the columns where the special motor bar M' should be free for depression, the cam bar 62 rocks the lever 20 clockwise to disengage the stud 22 trom the notch 82 in the motor bar stem. In all other columns, the lever 2l is free to be urged to latching position by its spring 21 which causes a stud 62 to enter notch 22, thereby -preventing depression of the motor bar M. In Fig. l. the parts are shown in the position they occupy in one of the columns where the motor bar M' is free for depression.

Control of automatic machine cycles 'Ihe manner in which the special motor bar M' is manipulated determines whether or not the machine shall be given an automatic cycle in a subsequent columnar position of the carriage, namely, the deposit. column.

When the special motor bar M' is depressed, it carries the main motor bar M down with it, and the two bars are latched down as previously explained. The counterclockwise movement of the lever 21, acting through a spring 12, raises the control link 12 to close the motor switch,

engage the clutch, and cause the machine to be given a cycle of operation. Near the end of the tlrst half of the cycle, the stud 22 on the fullstroke sector B2 engages a projection on the link 12 and moves it downward to normal. This opens the motor switch and disengages the clutch, the machine going through its second half cycle under the urge of springs 22. The downward movement of link 12 tensions the spring 12* because the motor bars are still latched down, and the tension ot the spring tends to again raise the link 12. Such movement of link12 is normally prevented, however, by the blocking latch 12b (Fig. 8) as described in Muller 1,397,774.

This latch moves over a stud 12 on the link 12 to temporarily hold down the link, the latch being normally released by the stud 12 carried by the rear end of the lever 21 acting on a forward arm 12e of the latch when the lever 21 moves clockwise when the motor bar M returns to normal. For a repeat cycle, said latch 12b is released by a carriage roll that acts when the carriage reaches its next position and w'hile the repeat hook 12 keeps the motor bar latched down, all as described in said Muller patent and as explained in more detail later. Normally, when no repeat cycles are wanted, the repeat hook 12 is released near the end ot the machine cycle and prior to the time when the latch 12h would be released by a carriage roll for a repeat cycle, whereupon the tension of spring 12* restores the motor bar to normal and no second cycle of machine operation occurs. But, if the repeat hook 12 is n ot released, then when the paper carriage moves to a position where a carriage roll effects the release of the latch 12".

` 'the link 73 will rise again and close the switch and clutch to cause a second machine cycle.

The motor bars, as well as the keys of the machine, are normally released near the end of each machine cycle by a restoring mechanism shown in Figs. l and 2. This mechanism includes a restoring bail 00 that extends across the machine in position to engage the key release latches IDI for the key latching plates of the various banks of the machine. One of the side arms that support this bail extends upward as shown in Fig. 1 to a position such that it may, when rocked, engage the end of a latch slide 98, having a projection 99 adapted to engage the end of the repeat hook 10. This restoring means is normally rocked far enough counterclockwisenear the end or' the machine cycle to engage both the key releasing latches I! and the motor bar latch plate 98, to not only release all the keys but to release the motor bars as well. However, said restoring means may be controlled so that it is moved only far enough to release the keys Without releasing the motor bars. Such control governed automatically by a repeat slide positioned by the paper carriage is described in Muller No. 2,087,542, but in the present machine the control of the restoring mechanism depends mainly upon the manipulation of the special motor bar M.

rihe releasing means is actuated near the end of the machine cycle by a three-armed member 89 pivoted at 90 (Fig. 2) and urged clockwise by a spring (not shown) In the normal position of the parts, shown in Fig. l, a projection on the full stroke sector 58 engages an arm of the threearmed member 39 and holds it counterclockwise against the urge of its spring. During the rst half of the machine cycle, the full-stroke sector moves counterclockwise which releases the three armed member 89 which thereupon follows the full-stroke sector in a clockwise direction. The rearwardly projecting arm of the threearned member 89 carries two pawls 9i and 92 adapted to uengage a roller stud 95 on the side arm Q6 of the restoring means. are of different size. rI'he arrangement is such that, if, during the clockwise movement of the three-armed member, both of the pawls pass below the stud GQ, so that the larger will engage said stud upon the return of the three-armed lever, then the restoring means will be rocked its full extent and both the keys and the motor bars will be released. But, if movement of the arm S9 is limited so that only the smaller of the two pawls passes below the roller stud, then said4 restoring means will be rocked a shorter distance, which distance is sufficient to restore the depressed keys 'but not to release the motor bar hooi; l0.

The special motor bar M carries a stud 80 on a depending arm 85 which stud engages the cam edge of a lever 82 pivoted at S8 and urged clockwise by a spring 815 (Fig. 3). The parts normally occupy the position shown in Fig. 1, where stud 8@ engages the cam edge of lever 8l above a notch 00a in said lever. When the special motor bar is depressed, stud 80 moves along the edge of the member 8! to a position below the noto S.

Lever 02 extends downward and its lower end is hook-shaped to provide a pocket 86 and an upwardly projecting lug 87. Both when the special motor bar is in normal position andrwhile it is held fully depressed, the member 82 occupies the These two pawls of the path of a stud 88 on the three-armed member 89.

When the motor bar M is depressed and held depressed during the ilrst half cycle, the stud moves below the notch 80'l in the member 82 and holds the latter in the position of Fig. 3 so that, when the three-armed member 89 moves clockwise during the first half cycle, the stud 88 moves into the slot 8S in the member 82. This allows the member 89 a full clockwise movement with the result that both pawls 9| and 92 pass the roller so that, upon counterclockwise return movement of the three-armed member 89 during the latter half of the cycle, the restoring mechanism is operated for its full movement to release both the keys and the motor bar. The motor bar M' need be held depressed only long enough to permit the three-armed lever to complete its clockwise movement which it does during the rst hali cycle. Thus, in the present invention, when the motor bar M is depressed and held depressed a short time with the paper carriage in either of the check columns, the machine will go through the cycle to perform the operations set up in the check column, after Vwhich the cycle will stop and, for reasons previously explained, the carriage will tabulate to the deposit column and stop. l

If, however, the motor bar M is depressed and immediately released, the stud 80 will be in a position opposite the notch 805 in member 82. This allows the member 82 to be positioned so that, when the three-armed lever 89 rocks clockwise, its stud 88 will engage the end of projection 8T. This blocks full movement ofmember 89 so that only the paw] 92 passes the roller 95. The result is that, upon the return movement of member 89, the release mechanism will be moved only far enough to release the keys and not far enough to release the motor bars. The result is that the machine will be given another cycle of operation automatically but, in order to understand exactly what happens, the sequence of operations must be followed through.

The motor bar M' is depressed and released immediately with the carriage inone of the check columns. The machine goes through a cycle to perform the necessary operation in this column and, near the end of the cycle, the paper carriage moves to the deposit column. Near the end of said machine cycle, the pawl 92 on three-armed member 89 rocks the releasing mechanism but does not release the repeat hook l0. This occurs prior to the time the carriage reaches the deposit column. The machine is position of Fig. 3 where the lug 81V is rearward 75 thus set for a repeat cycle but this cycle does not occur until the carriage reaches the deposit column, owing to the presence of the blocking latch 13b heretofore described. But, when the carriage reaches the deposit column, the machine immediately goes through a cycle. As said carriage arrives in the deposit column, a cam roll (Fig. l) acts as described in Muller 1,397,774 to rock a repeat lever 06 which, in turn, rocks a bell crank |06* (Fig. 5) to move a repeat slide |01 rearward. Rearward movement of repeat slide |01 causes its hooked end |08 (Fig. 8), to release the blocking latch 'I3b whereupon the link 13 rises to give the machine another cycle. During the iirst half of this automatic cycle, the three-armed member 89 is again rocked clockwise and, if the motor bar M were still held down, the parts would be set for a third automatic cycle. Another cycle is wanted for a positive total but not for a negative total.

While the paper carriage is in the deposit column, the carriage roll |88, which moved the bell crank |08n andL slide |81 to trip the latch 13'. as the carriage moved into said column, holds the bell crank |80l in sucha position that a second arm |80 of said bell crank engages a stud 82" on a rearwardly 'extending arm 82 of the mem- 'ber 82 and holds the latter in a position such oted at I I0 and urged counterclockwise by spring ||8. This rocks lever ||8 clockwise, the spring ||0 being strongerthan spring ||0. Clockwise movement of lever I|8 causes its notched end |20 to move upward and become disengaged from a lug |2| on a rearward projection of a lever |22 pivoted on shaft |28 and urged clockwise (Fig. l)

' by a strong power spring |24. When said lever |22 is` thus released by the carriage acting through the train of parts just described, it is moved bythepower spring from the position of Fig. l to that of Fig. 5. This power spring concemed, no repeat cycle will occur after the automatic cycle with the carriage in the deposit column. However, as will be presently explained, at the end of said cycle the paper carriage tabulates to the total-taking column and another automatic operation may take place under control cf mechanism that will be described in connection with total taking.

Thus, the special motor bar M' controls mechanism such that, if said bar is depressed and held depressed a short time, the machine will go through only one cycle, which is the cycle in the column where the bar is depressed, after which the carriage will move to the deposit column and stop. But if said motor bar M is depressed and instantly released, the machine will kgo through the cycle in the column where said bar isy depressed, the carriage will move to the "deposit" column, the machine will go through another stitutes the power means for moving the totaltaking control means to total-taking position.

Lever |22 has an upwardly and forwardly projecting arm |20 adapted to engage a stud |21 on a 'If-shaped lever |28 that is a part of the Burroughs total control means and which is fixed to the shaft |23. Referring to Fig. 4, said shaft |23 extends across the machine and it has an arm |20 fixed to its right-hand end, which arm is connected by a link |3| to the bell crank |30 carrying the'total key T. When the arm |22 (Fig. 5) is moved by the power spring |24 the cycle automatically, and the carriage will then move to the total-taking or "balance" column.

Automatic total-taking mechanism When the paper carriage moves into the totaltaking or "balance" column, the total-taking control means is automatically conditioned for total taking and the machine goes through a total-taking cycle automatically, provided the total is positive. l

The machine is equipped with a mechanism for eliminating one of the spacing cycles which were at one time necessary on the Burroughs machine, said mechanism being described in Muller 1,844,070. It is also equipped with a mechanism such as shown in said patent for causing the machine to be given a cycle of operation when the :letal-taking means is conditioned for total tak- As the carriage moves into the balance column, a large carriage roll |08 similar to the large roll 33 shown in Fig. 2 of Muller No. 2,087,542 en y gages the repeat control lever |00 to move the repeat slide |01 from the full-line position of Fig. 5 to the dotted-line position of said figure. This full rearward movement of the repeat slide normally causes a power means automatically to move the total-taking control means to totaltaking position and movement of the latter causes an automatic machine cycle as will now be explained.

When the repeat slide |01 is moved rearward to the dotted-line position of Fig. 5, an upper arm |08 thereof engages one arm of a bail-like it engages a lug ||1 on another lever ||8 also piv- .spring |39.

lever |28 is moved from the dot-dash to the full-- line position of said figure. This rocks'the shaft |23 clockwise in Fig. 5 which is counterclockwise in Fig. 4. Such movement of shaft |23 in Fig. 4 rocks the bell crank |30 clockwise which is the same direction of movement given it when the total key is depressed. 'I'he rocking of shaft |23 also causes the spring |23* (Fig. l) to move the link -|23b rearward as described in fMuller 1,844,070. 1A stud |23 on said link rocks bell crank |23d clockwise which acts through a spring |23 (Fig. l) to operate the motor switch and clutch ,and causes the motor drive to give the machine a cycle of operation.

Thus, when the carriage moves into the balance" column, it causes a power means to move the total-making control means to total-taking position and the movement the the latter causes the power drive of the machine to give said machine a cycle of operation during which the total is taken.

'Ihe total-taking control means `and its power spring are returned to normal as follows:

During the first half of the machine cycle in -total taking, the stud 52 on the full-stroke sector 03 engages the cam edge 5| on the three-armed lever 48 and rocks it clockwise as previously explained. Pivoted to the upper and forward arm |30 of the three-armed lever 48 is a pawl |36 (Figs. 2 and 5) having a hook portion |31 and a notch |38, the pawl being urged clockwise by a When the lever 48 is moved clockwise by full-stroke sector 53 during the first half of each cycle, the pawl |30 is moved to the right, but, as long as the total lever |20 is in its normal left-hand position, this has no effect because the stud |21 on lever |28 engages the top of the hooked end of pawl |30 and holds it down so that shoulder |30 will not engage stud |4|. But, after the total lever |20 has moved to the right for a total-taking cycle, and when lever 48 moves pawl |30 during the first half of the total-taking cycle, the notch |38 of pawl |30 engages a stud |4| on alatch |42 and rocks said latch clockwise against lieved and when the latch |42 is released both said spring and its anchor |46 are free for move ment. A relatively light spring |50 (Fig. 2) then acts to swing lever |22 counterclockwise and said lever, acting through spring |24, swings the anchor lever |46 counterclockwise, the movement of the parts being limited by engagement of lever |46 with the stud 52 in the full-stroke sector 53 which, at the time, is in its lower position. As the sector 53 returns to normal during the second half of the cycle, the anchor lever |46 follows stud 52 and moves to the dot-dash position of Fig. 5 which allows lever |22 to move to its normal position under the urge of spring |50, As the three-armed lever 48 is rocked clockwise during the first half of the machine cycle in total taking by the engagement of stud 52 on the full-stroke sector 53 with the cam edge 5| on the lever 48, its upper forward arm |35 engages a depending nger |53 of lever I|4 and rocks the latter counterclockwise to move its rear end above latch ||3 which thereupon snaps over the end of said lever i I4 to hold it in position. The latch I3, when it was tripped by the slide |01, was allowed to move back toward latching position because the large roll on the carriage passes slightly over the high point of its lever so that slide |01 is moved fully rearward and then allowed to come back slightly. The restoration of lever I I4 also releases the lever IIS which is thereupon moved by its spring so as to move its notched end to a position such that, as said lever |22 returns to normal during the latter half cycle, the notched end |20 will snap over the lug |2I on lever |22. Thus, lever I' 22 is again latched in its normal position. During the second half of the total-taking machine cycle the threevarmed lever 48 is released and it returns counterclockwise to normal under the urge of its spring. rlhis moves the hooked pawl |36 forward and releases the latch |42 which tends to return to normal under the urge of its spring. Said latch |42 cannot return immediately because the anchor lever |46 occupies the dotdash position oi Fig. 5. Instead, the edge of said latch Iii?? rests on the lug on the end of lever |46. During the rst half of the next machine cycle, the stud on full-stroke sector 53 rocks the anchor lever Idil clockwise until the latch |42 snaps over it. This retensions the spring E24 and thus recocks the power means that operates the totaltaking conti l means.

" im "1s retensioned and the link |23b during the total-taking l) which is rocked by ng mechanism of the machine li."u`ier ,844,070.

shaft |23 and the total key cannot start ti ir return to normal immediately when the lever and arm |26 begin to move ward their normal positions. A roller |28f :'Fig. 5) on the lower end of the lever |28 cooperates with an arcuate flange 53a on the full stroke sector 53 to prevent movement of the lever |28, shaft |23 and total key during cycles or" operation of the machine. At the beginning or" the cycle of operation, the full stroke sector 53 rocks counterclockwise and carries the ilange 53P- down on one side or the other of the roller 3288, depending on the position of the lever 328, the shaft 23 and the total key at the time, and prevents these parts from changing their positions during the cycle, but as the full-stroke sector 53 returns clockwise to its normal position at the end of the cycle, the lower end of the :Ilange 53a is raised above the roller |28 so that the lever |28, shaft |23 and the total key can be restored atthe end of the total taking cycle by the usual spring corresponding to that numbered |23* in the Muller Patent 2,087,542.

Control of automatic machine cycles by sign of total When the carriage moves into the balance column with a negative total in the main registering mechanism or crossfooter, the machine will not be conditioned for total taking nor will an automatic machine cycle occur. This is true no matter whether the preceding operation involved entering a deposit in the deposit column or whether the machine went through an automatic spacing cycle in said deposit" column.

Referring to Fig. 4, a three-armed lever or setting member |60 is provided which is pivoted at |6| anc. which may be set in either of two positions depending upon the sign of the total in the crossfooten Said member is releasably held in the position to which it is set by a spring detent |62. Its position is determined by cams, such as the cams I6 and I1 (Fig. l) on the-highest order add and subtract pinions in the manner described in detail in Pasinski 1,778,506 and Muller 2,087,542. When the total in the crossfooter is positive the setting member occupies the position illustrated in full lines in Fig. 4 whereas, when the crossfooter goes negative, the member is moved counterclockwise to the dot-dash position of Fig. 4. The reverse action takes place when the crossfooter changes from negative to positive condition.

The upper arm of the member |60 carries a stud |63 operating in a slot |64 formed in the forward end of a link that is connected to the member I4ln which, after the position of the subtract lever is changed, is moved to add or subtract position as the case may'be during a machine cycle. The slot |64 has two notches in its upperl edge as shown in Fig. 4.

When the total is positive the member |60 is in its forward full-line position of Fig. 4. If the add-subtract controlling means is in add position at that time, the link |65 occupies its rearmost position and the stud |63 is in the forward notch of slot |64. The parts are then in what may be called normal or nonlocking condition.

When the paper carriage moves into the balance" column, the add-subtract controlling means is always in add condition either as a result of a deposit entry in the preceding column or as the result of an automatic spacing cycle.

If, with the add-subtract controlling means in add condition, the total is negative, the member |60 occupies the dot-dash position of Fig. 4, in which position the stud |63 contacts the upper edge of the slot |64 between the two notches in said slot, and the link |85 is raised as shown in dot-dash lines in Fig. 4. This raising of the link |65 is utilized to prevent the automatic total-l taking cycle in the balance column. In actual operations, the total goes negative at the time a check is subtracted, and it is the movement of link |65 at the time the add-subtract controlling means is moved to add condition that moves the parts to the position above explained. The control of the automatic cycle is as follows:

The upper edge of link |65 contacts a. stud |66 on an arm |61 which is part of a yoke-like member |68 pivoted at its top as shown in Fig. 4 and urged counterclockwise by a spring as will be presently explained. This yoke extends across the machine and, at its other side, has an integral negative, the movement of the link.|66 (Fig. 4)`

rocks the bail |68 clockwise in Fig. 4, or counterclockwise in Fig. l. This moves the shoulder of arm |16 over the arm |16 and blocks movement of lever |22. Consequently, when the carriage arrives in the balance" column with a negative total in the cross-footer and when said carriage releases the mechanism for an automatic total-taking cycle, said cycle will not occur and the operator will know that a negative total exists. Such notification will occur before a total is taken.

The above blocking of the machine against an automatic cycle also locks the total key T. This takes place through the medium of a lever |1| (Fig. 4) yieldingly connected by a spring |10 to the arm |69 of bail |68. When said ball is rocked clockwise under the conditions above explained, the upper end of arm |1| is moved under a stud |12 on the bell crank |30 carrying a total key, thus blocking depression oi' said key. This takes place against the tension of a spring |1| that urges arm |1| clockwise and which is the spring heretofore mentioned that urges the bail |66 counterclockwise in Fig. 4.

When the machine is blocked against opera-- tion, it may be desirable, nevertheless, to take and print the negative total. This may be done as follows:

The operator moves the subtract lever |4 for-y ward to subtract position. I'his conditions the machine so that the "crossfooter" will be tumbled to subtract position during the next machine cycle. But the movement of the subtract lever does not move the link |66 forward because said link is connected to a portion of 'the addsubtract control'means that moves as the crossfooter frame is tumbledfduring the rst half o f said machine cycle. The operator then depresses the regular motor bar M, which causes a machine cycle during which the "crossfooter is tumbled from add to subtract position during ward so that the rearmost notch in the slot |64 The link |66 is in register with the stud |63. can then move down and, in so far as link |66 is concerned, the bail |66 will be released for counterclockwise movement. If the bail |68 were to move to released position immediately, its arm |15 would release the arm |16 of the power operated member |22 for operation by the strong spring |24 and it might be thought that the machine would be conditioned for total taking during the early half of the spacing cycle. But this does not occur for the following reason:

Referring to Fig. 2, it will be observed that, in a normal position of the parts with the lever |22 latched bythe latch ||8, the arm |16 is slightly below the shoulder of the arm |15 so that the bail |68 is free for movement. When the paper carriage went into the balance column the latch ||8 was released, whereupon the strong spring |24 pulled the lever |22 a short distance to cause the arm |16 to engage the shoulder on arm |16. The spring |24 is so strong that a very considerable frictional resistance between |16"andV |16 is present. This prevents the light spring |1I (Fig. 4) from pulling the bail- |68 to released position when it is released by link |65 as above explained. The -threearmed lever 48, which is rocked clockwise by the stud 62 on the full-stroke sector 53, has a pin and slot connection (Fig. 2) with a bell crank |8| pivoted at |82. The forwardly extending arm |83 of this bell crank has a cam edge engaging a stud |84 on an extension of the member |22. Near the end of the tlrst half of the spacing cycle, the stud 62 on the full-stroke sector rocks the three-armed lever 48 clockwise which rocks thev bell crank |8| counterclockwise and the cam edge of arm |83 rocks the lever |22 slightly counterclockwise against the tension of the spring |24, there being sufcient force to do this owing to the fact that the full-stroke sector 63 is moved directly by the motor. Consequently, the friction contact between the arms 16 and |16 is relieved, and the bail |68 moves to released position. The above movement oiilever |22 is suilicient to permit the latch ||8|20 to snap back to position behind lug |2| on the member |22, said latch being released during the first half of the spacing cycle by the clockwise movement of the three-armed lever 48 as described in connection with the restoration of these parts. The return of latch ||8|20 to latching position locks lever |22 and thus prevents the power spring |24 from moving the total-taking control means to totaltaking position.

Since the operator depressed the regular motor bar for the spacing cycle, the machine will stop after going through said cycle and the carriage will not tabulate because the tabulating mechanism is disabled or normalized automatically as the carriage moves into the balancei'column as disclosed in the Muller Patent 2,087,542 and is reenabled only when the total-taking control means is set for total taking as also disclosed in said Mullerpatent. Consequently, the carriage will remain in the balance column until the machine' is cycled with the total key depressed.

'I'he operator continues to hold the subtract lever in subtract position and then depresses the total key, which causes the total-taking control means to be conditioned for total taking and the machine to be given a total-taking cycle as in Muller 1,844,070.

If, at thetime he enters a check, the operator knows that it will cause an overdraft and, if he nevertheless wants to obtain and print the negative total, he can speed up the operation of the machine by operating it in a modiiled manner as follows: After he has indexed the check on the amount keys, he puts his finger on the subtract lever. to hold it in subtract position and then depresses the special motor bar M' and releases it immediately, continuing to hold the subtract lever in subtract position. The machine will go through a cycle in the check column and subtract the check from the crossfooter, thereby causing the latter to go negative. Near the end of the cycle, the carriage will move to the deposit" column where the machine will go through kan automatic spacing cycle, the operator continuing to hold the subtract lever in subtract position. This is an idle cycle since the machine is already in subtract condition with the total in the crossfooter" negative. Near the end of this automatic cycle, the carriage will tabulate to the balance" column. The operator continues to hold the subtract lever in subtract position and when the carriage reaches the balance column the machine will go through a total-taking cycle automatically because the machine is in subtract condition and the total in the crossfooter" is negative so that the parts heretofore explained will be released and the power spring |24 will condition the machine for total taking and cause a negative total to be taken. This mode of operation can be used when the operator knows there is a negative total and when he desires to print it nevertheless.

It will be obvious to those skilled in the art that the principles of this invention may be applied to other machines and that many variations in the details may be made without departing from the spirit and scope of the invention as denned in the appended claims.

I claim:

1. A calculating machine of the class disclosed having a motor operated driving means. drive control means conditionable to cause said driving means to give said machine a cycle of operation, means operable to condition said control means, manipulative means, including a depressible motor bar, for operating said conditioning means,

means for retaining said conditioning means in operated position when operated, and means movable automatically at a predetermined time in the machine cycle to 9. position to release said conditioning means from said retaining means, f

said manipulative means including elements conditioned by depression of said motor bar and continued manual pressure thereon beyond said predetermined time in the machine cycle to permit said releasing means to move to said releasing position and release said conditioning means to return to said unoperated condition without causing a further machine cycle, said elements being conditioned by depression 'of said motor bar and withdrawal of manual pressure therefrom prior to said predetermined time in the cycle initiated by said depression to prevent said releasing means from moving to said releasing position in said machine cycle whereby said conditioning means is retained by said retaining means in its operated position to condition said drive control means to cause an automatic further cycle of operation of said machine.

2. A calculating machine of the class described, having a motor operated driving means, manipulative means conditionable to two out-of-normal conditions, drive control means conditionable by said manipulative means to cause said driving means to give the machine a cycle of operation, means normally movable during each machine cycle initiated by the conditioning o! said manipulative means, means operable automatically under control of said movable means to control said drive control means lior causing said driving means to give the machine an automatic second cycle of operation following the cycle initiated by the conditioning of said manipulative means, and means conditioned by said manipulative means in one of said out-of-normal conditions to prevent eiective control of said drive control means by said automatically operable means under control oi said movable means but conditioned by said manipulative means in the other of said out-ofnormal conditions to permit eilective control of said drive control means by said automatically operable means under control o! said automatil cally movable means.

3. A calculating machine of the class described, having a motor operated driving means, manipulative means conditionable to two out-oi-normal conditions, drive control means conditionable by said manipulative means to cause said driving means to give the machine a cycle of operation, a traveling paper carriage normally automatically moved to a new position toward the end of each machine cycle, means controlling the movement of said carriage and conditioned by said manipulative means when the latter is placed in either of said out-of-normal conditions to cause the carriage to move near the end o! the ensuing machine cycle directly to a predetermined position and skip any intervening position, drive repeat means operable by movement o! said carriage to said predetermined position to control said drive control means for causing said driving means to give the machine an automatic second cycle of operation following the cycle initiated by the conditioning of said manipulative means,l and means conditioned by said manipulative means in one of said out-oi' -normal conditions to prevent effective control of said drive control means by said drive repeat means by movement of said carriage but conditioned" by said manipulative means in the other of saidv out-of-normal conditions to cause effective control of said drive control means by said drive repeat means by movement of said carriage.

ROBERT L. MULLER.

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