US3040978A - englund - Google Patents

Description

June 26, 1962 G. R. ENGLUND 3,040,978

ACCOUNTING MACHINE HAVING SIMULTANEOUSLY SET TOTALIZERS, AMOUNT INDICATING MEANS, AND PRINTING MEANS Filed Jan. 14, 1957 5 Sheets-Sheet 1 June 26, 1962 G. R ENGLUND 3,040,978

ACCOUNTING MACHINE HAVING SIMULTANEOUSLY SET TOTALIZERS, AMOUNT INDICATING MEANS, AND PRINTING MEANS Filed Jan. 14, 1957 5 Sheets-Sheet 2 LOOKING RAIL JW 6mm R. Mao/v0 June 26, 1962 G. R. ENGLUND 3,040,973

ACCOUNTING MACHINE HAVING SIMULTANEOUSLY SET TOTALIZERS, AMQUNT INDICATING MEANS, AND PRINTING MEANS 5 Sheets-Sheet 3 Filed Jan. 14, 1957 June 26, 1962 G. R. ENGLUND 3,040,978

A UNTING MACHINE HAVING SIM ANEOUSLY SET TALIZERS, AMOUNT INDICATI MEANS, AND

PRINTING MEANS Filed Jan. 14, 1957 5 Sheets-Sheet 4 Jm wA JZ z/ Gasm F. f/VGL 0ND June-26, 1962 G. R. ENGLUND 3,040,978

ACCOUNTING MACHINE HAVING SIMULTANEOUSLY SET TOTALIZERS, AMOUNT INDICATING MEANS AND PRINTING MEANS 5 Sheets-Sheet 5 Filed Jan. 14, 1957 T\\\\\\\\\&

United States Patent Filed Jan. 14, 1957, Ser. No. 633,947 Claims priority, application Sweden Jan. 23, 1956 8 Claims. (Cl. 235-6031) The present invention relates to cash registers, book keeping machines and similar machines having movable members, such as racks, toothed segments or the like, for simultaneously setting the totalizers, the amount indicating means and the printing means of the machines.

An object of the invention is to provide a machine of said kind, in which the operating of a controlling element, such as a key, a lever or the like, results in a corresponding setting of the amount indicating means, the printing means and the means for entering the amounts into the totalizers, by power positively derived from the motor shaft, hereinafter referred to as the main shaft of the machine. The term positively as used in this connection has reference to a power transmission carried out without theaid of springs, as hitherto commonly used in machines of this kind for the storage of power to be utilized in effecting the setting or resetting operations. Because of the absence of springs all risks of false setting operations, which might otherwise result from the springs getting into disorder or otherwise not operating in the manner desired, are avoided; such risks may consist, for instance, in an initiated movement being not completed or a completed movement being exceeded. In other words, the positive power transmission secures a correct performance of all movements initiated.

Another object of the invention is to provide a machine of the kind set forth in which the means for entering the amounts into the totalizers are capable of entering an amount as determined by an operated controlling element, either in positive or negative direction, according as an additive or subtractive function is desired.

A further object of the invention is to provide a machine of the kind set forth in which the amount indicating means, such as drums, and the printing means, such as type wheels, may be shifted from a set position to another without requiring first restoring them to a fixed starting or normal position.

A still further object of the invention is to provide a machine of the kind set forth in which resetting of the totalizers to normal from a set position causes a positive setting of the amount indicating drums and the type wheels to a position corresponding to the respective set position of the totalizers.

A feature of the invention resides in the provision of transmission means whereby the above said setting members may be positively operated by power derived from the main shaft of themachine both as far as their setting and their resetting movements are concerned.

A further feature resides in the provision of stop members associated with or controlled by keys, levers or like operating elements for determining the final positions of the setting members by projecting into the paths thereof. 7

These and other features of the invention will appear from the following description of an example of a machine according to the invention, reference being had to the accompanying drawings. It is to be noted that the keys shown as controlling elements and the racks shown as setting members should not be considered as limiting the invention but merely as exemplifying the structural form of the invention.

3,043,978 Patented June 26, 1962 In the drawings, FIG. 1 is a vertical section of the machine taken along a plane parallel with the side walls of the machine adjacent a group of keys and showing an associated group of setting racks in their normal position. FIG. 2 is a similar view of a portion of FIG. 1 with the setting racks in a set position. FIG. 3 is a perspective view of a group of setting racks belonging to a bank of keys showing the individual racks of the group displaced laterally out of contact with each other but otherwise positioned in the same order as in the machine. FIGS. 4 and 5 are elevations taken at right angles to each other of a cam on the main shaft adapted to control the operation of a locking rail. FIGS. 6 and 7 are corresponding elevations of a cam on the main shaft adapted to control the operation of the setting racks. FIGS. 8 and 9 are elevations at right angles to each other of a transmission for operating a total taking rack. FIG. 10 is a side elevation of part of a totalizer shaft with a group of totalizer wheels thereon and means for controlling the longitudinal displacement of the shaft, the shaft being shown in an initial position. FIG. 11 is a similar view with the shaft shown in a displaced position. FIG. 12 is a cross section of a totalizer shaft with a totalizer wheel thereon and retainin means therefor shown in a released position. FIG. 13 is a similar view showing said retaining means in a locking position. FIG. 14 is a time diagram relating to the cycle of operations of the machinev as performed during a revolution of the main shaft.

It is to be noted that the drawings illustrate such details only of the machine which are necessary for explaining the invention.

The portion of the machine shown in FIG. 1 comprises a keybank including nine amount. keys A A having heads carrying the FIGURES 1-9, as shown, and a key stem A having no head which represents the banks zero key. Said zero key is normally in depressed state but is restored upon depression of any of the keys A -A The means for performing this restoration of key stem A comprises, in the example shown, a sliding bar B having oblique slots engaged by lateral projections (not shown) of the key stems. It is to be noted that the slots engaged by the projections of the keys A A are inclined oppositely to the slot engaged by the projection of the zero key stem A, as shown. The lower ends of the key stems engage and are guided by borings formed in a stationary platform C which may be common to all key banks of the machine.

Provided below said platform C are groups of parallel racks reciprocable in the longitudinal direction of the key banks, there being one such like that shown in FIG. 1. Each group includes three racks, viz. a totalizer rack 2, an indicator rack 3 and an auxiliary rack 4. The relative order of positioning said racks in the lateral direction is that shown in FIG. 3, though, in reality the racks lie side by side in contact with each other. The totalizer rack 2 and the auxiliary rack 4 which, as shown, are located on opposite sides of the indicator rack 3 are each formed with a set of lugs 5 and 6, respectively, upstanding from their upper edge for cooperation with the lower end of the stem of a depressed key, projecting below the platform C. The totalizer rack 2 and the auxiliary rack 4 are adapted to be displaced in opposite directions by means positively driven from the main shaft 1 of the machine in order in their turn to move the indicator rack 3 in opposite directions- To this end the totalizer rack 2 is formed with an offset 7 turning to the right in FIG. 3, while the auxiliary rack 3 is formed with a similar offset 3 turning to the left in FIG. 3. For its cooperation with the offset 7 the indicator rack 3 has a lug 9 on its side facing the totalizer rack, and for its cooperation with the offset 8 the indicator rack has a lug 10 on its opposite side. The two lugs 9 and 10 are group for each key bank a spaced in the longitudinal direction of the rack sufliciently to permit their cooperation with said offsets 7 and 8, respectively.

The offset 7 and 8 are formed on projections 11, 12 depending from the lower edges of the respective racks 2 and 4. Said projections 11 and 12 are each formed with a downwardly open recess 13, 14, respectively, each bounded upwardly by a semicircular surface. Said recesses are. engaged by the circularly rounded upper ends 15, 16 of two rack controlling levers 17, 13, respectively, the lower ends of which are rotatably mounted on a common shaft 19. Along the middle portion of their length the levers 17 and 18 are each formed with a slot 20, 21, respectively, for receiving a guide roller journalled at 22 to the upper end of a link 23, as hereinafter described. The slots 20 and 21 represent reflections of each other and are so shaped that with the guide roller on journal 22 in engagement with the bottom ends of the slots the upper ends 15, 16 of the levers 17 and 18 are at a maximum distance apart related to the longitudinal direction of the racks, as shown in FIG. 1, whereas they are in register with each other laterally, when the guide roller engages the top ends of the slots 20, 21. The link 23 carrying the journal 22 at its upper end has its lower end pivoted at 24 to a lever 25 mounted on a stationary shaft 26, on the opposite side of said shaft the lever 25 is shaped as a fork having two arms each of which carries a roller 27, 28, respectively. Said rollers each en gage a separate one of two axially spaced cams 29, 30, respectively, on the main shaft 1 of the machine, as is best seen in FIGS. 6 and 7.

The totalizer rack 2 is formed on its lower longitudinal edge with a set of teeth for cooperation with the totalizers of the machine. The indicator rack 3 is likewise formed with a set of teeth. on its lower longitudinal edge for cooperation with a transmission wheel 31 on a shaft 32 which also carries transmission wheels 33 for driving the amount indicating drums 34, 35 via pinions 36, 37 fastened to the shafts 38, 39 of said drums as well as for driving a type Wheel transmission gear 40.

At 41 is shown a locking rail for cooperation with the gears 33. Said locking rail is controlled by power derived from the main shaft 1 by means of two axially 'spaced cams 42, 43 thereon, FIGS. 4 and 5, engaged by two rollers 44, 45. Said rollers are journalled at opposite ends of a rocking lever 46. Said rocking lever is mounted on a shaft 47 and connected by a link 48 to one end of a lever 50, see FIG. 1, mounted on a shaft 49 near its one end and supporting the locking rail 41 at its other end.

' The totalizer wheels are in well known manner arranged as groups in each totalizer. In FIGS. 1 and 8 the shafts 51 of four totalizers are shown. It is to be noted, however, that the number of totalizers are of no importance as far as the idea of the invention is concerned. Hereinafter one totalizer only will be referred to, as the structure and operation are analogous for all totalizers include in the machine.

Each totalizer shaft 51 carries a plurality of identical groups of totalizer wheels 52, each such group including a totalizer wheel for each of a number of clerks as well as for each of a number of transactions. All groups may be displaced in common along their shaft a distance totally corresponding to the axial length of a group of totalizer wheels in order to permit setting of any desired totalizer wheel into operative position in register with a laterally immovable totalizer rack. The totalizer shaft may be shifted laterally to and from the totalizer rack between a lower, inoperative position in which the totalizer wheels are located out of the path of the totalizer rack, and an upper, operative position in which the totalizer rack may engage a totalizer wheel in register therewith. The firstmentioned, inoperative position is shown in FIG. 10, the lastmentioned, operative position is shown in FIG. 11. The means for effecting said radial shifting of the totalizer shaft and the manner of operation of said means may be of well known character and are therefore, not described or shown. In FIG. 8 only levers for raising the totalizer shaft are indicated at 53.

As thus far described the machine operates as follows:

In the position shown in FIG. 1 the key A is depressed The totalizer rack 2 and the auxiliary rack 4 are maintained in their initial position by the rack controlling levers 17, 18 under the control of the cams 29, 30 of the main shaft 1 which is now in its normal position (angular position 0 on the time diagram, FIG. 14). The indicator rack 3 remains in the position determined by a setting operation. The amount indicating drums 34, 35 and the type wheel gear 40 as operated by the indicator rack at said setting action also remain in their set positions, held therein as they are by the locking rail 41. The totalizers are in their inoperative or lower positions.

Upon the depression of a key, as A in the example shown, a cycle of operation is initiated and completed by rotating the main shaft 1 one revolution in counterclockwise direction, either manually or by mechanical means. At the beginning of said cycle of operation (0-l0 on the time diagram) the locking rail 41 is released from its engagement with the transmission wheels 33. This releasing action is controlled by the pair of cams 42 and 43 of the main shaft turning the rocking lever 46 in clockwise direction. Through the link 43 a corresponding movement is imparted to the lever 50, causing it to release the locking rail 41. As a result, the transfer wheels 33, 31, the amount indicating drums 34, 35, the type wheel gear 40 and the indicator rack 3 are now ready for setting.

After the main shaft has rotated (see the time diagram) the pair of cams 29, 30 starts acting on the rollers 27, 23 at the forked end of lever 25, causing said lever to move counter-clockwise around its pivot 26. By this movement of the lever 25 the link 23 connected to the outer end thereof, at 24, is moved upwards. The roller on journal 22 which engages the slots 21?, 21 of the rack controlling levers 17, 18 causes the upper ends of said levers 17, 18 to approach each other according as the roller on journal 22 moves upwards in said slots until, in the uppermost position of the roller, the levers 17, 18 come into register with each other, as shown in FIG. 2. In said movement the lever 17 carries the totalizer rack 2 with it, that is to say, moves it upwards, while the lever 18 takes the auxiliary rack 4 with it, that is to say, moves it downwards. If at the beginning of the oper ation described the indicator rack is not already in its uppermost position, corresponding to the position of key A it will move upwards with the totalizer rack when the offset 7 thereof engages lug 9 of the indicator rack. By

this action the indicator rack 3 is moved upwards, that is to the right in the drawing until a lug 5 of the totalizer rack 2 is stopped by striking the lower end of the stem of the depressed key A thereby preventing a continued upward movement of the totalizer rack. If at this moment the roller on the journal 22 is not in its uppermost position, the rack controlling lever 17 will be held against movement during the continued upward movement of said roller to its final position, while the upper end of the rack controlling lever 18 will be moved downwards, that is to the left, until it comes into register with the, as already stated, still standing rack controlling lever 17. While the upper ends 15 of the rack controlling levers 17, 18 have thus been brought into register with each other, the uppermost lugs 6' of the auxiliary rack 4 have been brought into engagement with the upwardly facing side (that is, the right hand side) of the stem of the key depressed, as shown in FIG. 2. The indicator rack 3 is thus locked in a position determined by the key A depressed, to which position it has been moved by a positive transmission of power from the main shaft of the machine without the aid of any springs thereby avoiding any risk of incorrect setting of the indicator rack. The same comment applies to the totalizer rack 2 and the auxiliary rack 4 the final positions of which are determined by the stem of the key depressed.

The example of setting operation above described has reference to shifting from a lower to a higher denomination. In such a case the totalizer rack 2 acts as a mover for the indicator rack. If on the contrary, a shifting from a higher to a lower denomination is concerned, then the auxiliary rack 4 acts as a mover for the indicator rack displacing it downwards, until a lug 6 of the auxiliary rack is stopped by striking the key stern depressed and locked against further downward movement. In an analogous manner as above described in respect of the auxiliary rack, the totalizer rack will continue its movement until the upper ends of the two rack controlling levers 17, 18 come into register with each other, and a lug 5 of the totalizer rack 2 at the same time reaches the downwardly facing (that is to say, the left hand) side of the depressed key stem.

In any case, that is to say, whether shifting is made to a higher or to a lower denomination, the indicator rack 3 will be locked in its end position due to its lugs 9 and 1t) engaging the ofrsets 7 and 8 of the totalizer rack 9 and the auxiliary rack 4, respectively.

Since the end positions of the totalizer rack 2 and the auxiliary rack 4 may be situated at various points along the paths of said. elements, depending on the position of the key depressed, the controlling mechanism must be capable of permitting such an effect. To this end the pivot 24 connecting the link 23 to the lever 25 is positioned substantially in register with the common pivot of rotation 19 of the two rack controlling levers 17, 18 when the journal 22 is in its extreme upper position in the slots 20, 21.

The faultless setting of the indicator rack above described into a position exactly corresponding to the mark-.

ing on the key depressed had been transferred via the transmission gears 31, 33, 36, 37 to the amount indicating drums 34, as well as to the type wheel gear 40. After the respective amount has thus been transferred to the amount indication drums and to the type wheels, the locking rail 41 is again brought into engagement with the gear 33 (210225 on the time diagram) and remains in this state during the remainder of the cycle of operation '(cfr. the time diagram). The amount indication drums,

the type wheel gear and the indicator rack all remain looked in their set positions until they are released at the beginning of the next cycle of operation.

This locking operation being completed, the key depressed is restored to its raised position by means (not shown), which displace the bar B to the right in the drawing. When thus displaced the bar B draws the key stem A representing the Zero key, downwards. The restoration of the depressed key releases the locking of the totalizer setting rack 2 and the auxiliary rack 4- due to the stern of said key leaving its position between the lugs 5 and 6.

Between 230 and 275 of the remainder of the cycle of operation the rack controlling levers 17, 18 are reset to normal due to the roller on the journal 22 being re stored to its lower or normal position, as shown in FIG. 1. The rack controlling levers 17, 18 in their turn restore the totalizer setting rack 2 and the auxilary rack 4 to their normal positions. During the operations above described the totalizer rack 2 has performed a reciprocating movement the length of which in either direction corresponds to the marking on the key that has been depressed, and which in the example described was the key marked 9. Either of said movements, viz. either the setting movement or the resetting movement, may be utilized for operating a totalizer wheel 52. In the firstmentioned case the totalizer wheel is brought into mesh with the totalizer rack 2 prior to the rack leaving its initial position (120 on the time diagram) and is released from the rack after the latter has reached its turning point (215 -230 on the time diagram), in the lastmentioned case, the engagement is brought about only after the rack has reached its turning point, and ceases after the rack is restored to its normal position (275-290 on the time diagram). In the firstmentioned case the amount was entered into the totalizer in negative direction (subtraction), in the lastmentioned case in positive direction (addition). The amount having been entered, the totalizer will be lowered in well known manner not here described.

After the main shaft has completed its revolution, the machine will be ready for allowing depression of another key, resulting in another cycle of operation performed in the manner already described. It is to be noted that the indicator rack 3, the amount indicating drums 34, 35 and the type wheel gear remain locked in their prior set positions until said other cycle of operation is started. This means that during said other cycle of operation said rack and drums and gear will be set directly from their prior set positions into their new set positions without being first restored to a fixed or normal starting position. It is further to be noted that all setting and resetting movements hitherto described are effected by a positive power transmission from the main shaft of the machine by means of transmission devices not including any springs.

For the purpose of total taking the following arrangements are made:

Corresponding to each group of totalizer wheels on the totalizer shafts there is a total taking rack 54, as best seen in FIG. 8, which may be reciprocated in a path parallel to the totalizer rack 2 by power derived from the main shaft 1 via a pair of cams 55, 56 thereon, a toothed segment 59 controlled by said pair of cams by means of rollers 57, 58 and a toothed wheel 60 controlled by said toothed segment which also meshes with teeth provided on the lower edge of the total taking rack. The toothed segment 59 is mounted on the same shaft 26 as the lever 25 belonging to the rack controlling mechanism, see FIG. 1.

The total taking rack 54 is adapted to be engaged by a toothed wheel 61 rigidly secured to the totalizer shaft. Normally, said toothed wheel occupies a position axially displaced with relation to the rack 54, as shown in FIG. 10. In order to allow setting of the toothed wheel 61 to a position right opposite the total taking rack the totalizer shaft is slidable axially a distance corresponding to the space etween each two adjacent totalizer wheels. The mechanism for effecting such displacement is substantially shown in FIGS. 10 and 11. It comprises a total taking key the stem 62 of which only is shown in the drawing. Said stem is pivoted to one end of a pair of bell crank levers 63 the other ends of which are pivoted at 64 to a slide 65 engaging by a forked portion an annular slot formed in the shaft 51 which allows movement of the slide in a plane at right angles to the shaft. The bell crank levers 63 are mounted to rock on stationary journals 66. The pivotal connections of the bell crank levers with the key stem 62 on the one hand and the slide 65 on the other hand are so arranged as to constitute the corners of a link parallelogram. Thus, a depression of the key stem 62 will cause the bell crank levers to impart a parallel movement to the slide 65 with a resulting axial movement of the totalizer shaft 51 to the left in FIG. 10.

The extreme axial positions of shaft 51 may be fixed by a spring-loaded locking member 67 which may engage either of two axially spaced annular grooves 68, 69 of angular cross-section formed in the shaft 51. Under the pressure of its loading springs 67 said locking member 67 may retain the shaft 51 against unintentional displacement but may yield under the tension as exerted by the bell crank levers 63. The locking member 67 with its loading springs 67 are mounted in a carrier 70 comprising an inner part or an intermediate wall 71 of the machine frame. I

The totalizer shaft 51 carries for each group of totahzer Wheels a catching device so positioned as to be able either to engage a totalizer wheel situated right opposite the totalizer rack 2 or to take up a position of rest right oppo site an adjacent totalizer wheel, as will be hereinafter described. Such a catching device is shown in FIGS. 12 and 13. It comprises a spring loaded piston 72 located in a wide boring 73 formed in the shaft 51 along a chord thereof, said piston having a rod 74 guided in a narrower boring extending from the bottom of the boring 73. The loading spring 75 of said piston is situated between the piston and said wider boring. Placed between the piston and the mouth of boring '73 is a ball 76. Under the action of the pressure as exerted by the piston said ball is held in engagement with the inner peripheral surface of a totalizer wheel positioned right opposite the catching device. Each totalizer wheel is formed with a recess 77 at a point of its inner peripheral surface which may be engaged by the ball 7e as it comes into register therewith, whereby the totalizer wheel is locked against rotation with relation to its shaft. At an angular distance from the recess 77, as reckoned in clockwise direction in FIGS. 12 and 13, which is equal to the distance between each two adjacent teeth, the totalizer wheel is formed with a tooth 78 of a greater radial lengt than the remaining or normal teeth of the wheel. As far as the cooperation of the totalizer wheel with the totalizer rack 2 is concerned said longer tooth behaves like the other teeth, its object being, in addition to said cooperation, to act as a pawl for cooperation with a stop member in the shape of a cam 79 on a shaft 89 parallel with the totalizer shaft.

The above described total taking means operate as follows:

Prior to the total taking operation the totalizer shaft 51 is in the position shown in FIG. 10. The catching device 67 is by that time in engagement with the left hand grooves 69 of the shaft, .and the locking device 72, 76'is. situated right opposite an inactive totalizer (as 52 next to the totalizer wheel (as 52 which in the example shown in situated right opposite the totalizer rack 2, though out of mesh therewith. Thus, the totalizer wheel 52 may be freely rotated with relation to its shaft.

Upon depression of the total taking key (not shown) its stem 62 imparts a rocking movement to the bell crank levers 63, causing them to displace shaftSl to the left in FIG. 10, until the catching device 67 engages the slot 68, as shown, in FIG. 11. locking mechanism 72-76 will be moved to the totalizer wheel 52 which is in register with the totalizer rack 2. The toothed Wheel 61 fastened to shaft 51 which in the non-displaced position of the totalizer wheel is in mesh with one or the other of two stationary racks S1, 82, thereby keeping the shaft locked against rotation, by said operation will be brought to a position in register with the total taking rack 54. Thus, the raising of the shaft 51 into mesh with the totalizer rack will bring the toothed wheel 61 into mesh with the total taking rack 54. At the same time the totalizer wheel 52 from which the total taking shall take place, is brought into mesh with the totalizer rack 2, see FIG. 11.

During the cycle of operation during which the total taking operation is carried out, the rotation of the main shaft 1 between 130 and 215 of its revolution (cfr. the section of the time diagram relating to the resetting of the totalizer shaft) effects by means of the earns 55, 56 the toothed segment 59, the toothed wheel 60, the total taking rack 54 (see FIG. 8) and the toothed wheel 61 fastened to the totalizer shaft a rotation of the totalizer shaft through about 0.95 of a revolution in clockwise direction from its angular position of rest, shown in FIG. 12. During said rotation the catching ball 76 comes into engagement with the recess 77 of the totalizer wheel 52 The By this operation the shafts momentary position of said recess is determined by the amount entered into the totalizer wheel 52 As a result of said engagement the totalizer wheel is caused to partake in the continued rotation of the totalizer shaft to its step position. During this rotation the totalizer wheel displaces the totalizer rack 2 a distance corresponding to said amount. Simultaneously with said operation the totalizer rack controlling lever 17 is caused to move in the same direction under the influence of the lever 25 and the link 23 (215 of the time diagram).

The setting of the totalizer rack is fixed by the longer tooth 78 of the totalizer wheel 52 engaging the Zero stop 79. As a result, the totalizer wheel 52 is locked against rotation, in part, due to the engagement between the tooth 78 and the stop 79 and in part due to the engagemerit between the catching ball 76 and the recess 77, FIG. 13.

It is thus evident that the above described movement of the totalizer wheel 52 as caused by the totalizer shaft has resulted in a corresponding movement of the totalizer rack 2, which in its turn has set the indicator rack 3 in the manner hereinbefore described. Thus at the end of the movement the indicator rack is locked in a position corresponding to the position as occupied by the longer tooth 78 of the totalizer wheel 52 prior to the total taking operation due to the lugs 9 and it of said rack being clamped between the offset 7 of the totalizer rack and the offset 3 of the auxiliary rack'in a manner similar to that hereinbefore described. By this operation the amount indicating drums and the type wheel gear controlled by the indicator rack are set to positions corresponding to that of the indicator rack.

Between 210225 of the cycle of operation the locking rail 41 is locked in operative position and locks the indicating means and the type wheel gear, the rack controlling levers 17, 18 and the totalizer rack 2 being then restored to their normal positions in the manner already described (230-275 of the time diagram).

Let it be assumed that it is desired in connection with a total taking operation to reset the totalizer wheel. To this end said wheel is disengaged from the totalizer rack 2 at the end position thereof (215 230) with a resulting disengaging of the toothed wheel 61 from the total taking rack 54 and bringing it into engagement with a resetting rack 83 which acts to rotate the totalizer shaft 51 back to its normal angular position, so that following an axial displacement thereof in connection with restoration of the total taking key 62 to non-depressed position, shaft 51 takes up its position of rest, see FIG. 10 (at 230-270 of the rotation of the main shaft).

Let it further be assumed that after the total taking operation is completed it is desired to again enter the indicated amount into the totalizer wheel 52 To bring about this result said wheel 52 is allowed to remain in mesh with the totalizer rack 2 also during its restoration to starting position (230275) during which restoration the entering of the amount indicated takes place. Thus, the toothed wheel 61 will remain in engagement with the total taking rack 54 during the return thereof to its starting position (230 2709), thereby restoring the totalizer shaft 51 to its axial position of rest. In said position the toothed wheel 61 is in mesh with either of the stationary racks 81, 82 and consequently, locked against rotation.

Though in the above specification and in the drawing movable means in the shape of racks are described and shown, it is to be noted that said means may take other shape as for instance, that of toothed segments, without departing from the invention. Even other modifications may be made within the scope of theinvention as defined by the claims which follow.

What I claim is:

1. In a calculating machine, a pair of differentially settable elements, means mounting said pair of elements for rectilinear movement relative to each other and toward and away from a normal position, a third settable element control-led by the settings of said first and second settable elements, indicating means controlled by the setting of said third settable element, a plurality of keys, stop means controlled by the operation of one of said keys for arresting movement of said pair of settable elements in a position representing an operated key, a first lever pivoted at a first point and connected to one of said pair of settable elements, a second lever pivoted at said first point and connected to the other of said pair of settable elements, and actuating means engaging said first and second levers for operating said first and second levers to move said pair of settable elements from their normal positions into engagement with said stop means and from positions in engagement with said stop means to their normal positions.

2. The calculating machine set forth in claim 1 in which said actuating means includes a pair of oppositely extending slots in said first and second levers, and cam driven means extending through both of said slots.

3. In a calculating machine, nine keys representing the digits 1-9, three spaced groups of three stop members, each of said groups of stop members being controlled by three of said keys and each of said stop members being individually operable by an actuated one of the keys to a displaced position, a pair of differentially settable elements, three spaced stop means movable with each of said settable elements, each of the stop means on each of said settable elements being positioned to engage the three stop members in only one of said groups, means for moving said pair of settable elements relative to each other in opposite directions so that two step means on said settable elements engage opposite sides of a displaced stop member to arrest movement of said pair of settable elements in complementary positions representing the digital value or the actuated key, and means controlled by the setting of at least one of said pair of settable elements for providing a manifestation of the value of the digit represented by the actuated key.

4. The calculating machine set forth in claim 3 in which each of said groups of stop members is controlled by three keys representing digits of successively higher value and in which a first one or said keys includes a stem offset in one direction, a second one of said three keys includes a substantially straight stern, and a third one of said three keys including a stern offset in a direction opposite to said one direction.

5. In a calculating machine, key controlled means for displacing a stop member in accordance with the value of a digit, a pair of differentially settable elements, first drive means for moving said pair of elements relative to each other in opposite directions to complementary positions engaging said stop member and representing the value of said digit, an accumulator wheel adjustable to settings representing the values of entered digits, means for rendering said accumulator wheel responsive to movement of at least one of said pair of settable elements so that said accumulator wheel is moved to digit representing settings, second drive means for rotating said accumulator wheel, and means for coupling said accumulator wheel .to one of said pair of settable elements so said second drive means is effective to move said pair of settable elements to a setting corresponding to the digit representing setting of said accumulator wheel.

6. In an accounting machine, a pair of differentially settable elements, means mounting said pair of elements for rectilinear movement relative to each other and toward and away from a normal position, a plurality of keys, stop means controlled by the operation of one of said keys for arresting movement of said pair of settable elements in a position representing an operated key, a first lever pivoted at a first point and connected to one of said pair of settable elements, a second lever pivoted substantially at said first point and connected to the other of said pair of settable elements, said first and second levers including oppositely extending slot portions, link means including a portion extending through the oppositely extending slots in said first and second levers, a pivotally mounted lever means connected to said link means, and cam means for actuating said lever means for operating said first and second levers to move said pair of settable elements from their normal positions into engagement with said stop means and from positions in engagement with said stop means to their normal positions.

7. The accounting machine set forth in claim 6 in which one of said diiferentially settable elements includes a toothed portion, and an accumulating means disposed beneath said differentially settable elements and including a gear element movable into and out of direct driving engagement with said toothed portion.

8. The accounting machine set forth in claim 7 including a supporting plate disposed between and extending generally parallel to the direction of movement of said first and second levers, said first and second levers being pivotally mounted on said plate.

References Cited in the file of this patent UNITED STATES PATENTS 503,984 Palmer et al Aug. 29, 1893 1,285,234 Knistrom Nov. 19, 1918 2,226,919 Gubelmann Dec. 31, 1940 2,281,803 Robertson May 5, 1942 2,289,055 Landsiedel July 7, 1942 2,376,481 Gubelmann May 22, 1945 2,515,692 Boyden et al July 18, 1950 2,662,688 Sobisch Dec. 15, 1953 2,741,426 Golemon Apr. 10, 1956 2,744,682 Busch et al. May 8, 1956 2,759,667 Werner et al Aug. 21, 1956

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