US3667670A - Adding machine with printing device - Google Patents

Abstract

In a printing adding machine having a totalizer comprising a set of pinions cooperating with a set of racks, a second totalizer is provided for storing a number which is the sum of totals stored in the first totalizer. The second totalizer comprises a second set of pinions cooperating with a second set of racks which are connected to the first set of racks for upward and downward movement therewith.

Description

[151 3,667,670 [4s] June 6, 1972 United States Patent Okajima et a1.

ADDING MACHINE WITH PRINTING DEVICE [72] Inventors:

, UNITED STATES PATENTS Masaki Okqjima, Yokohama; Ryuzaburo Yokoyama, Urawa, both of Japan Ricoh Co., Ltd., Tokyo, Japan Nov. 13, 1970- 3,318,519 5/1967 Thevis...............................235/60MT 3,343,788 /1967 3,348,769 10/1967 Bennett.............................235/60 MT Busch MT [73] Assignee:

22 Filed:

Primary ExaminerStephen J. Tomslty I AtwrneyHcnry T. Burke, Robert S Dunham, P. E.

[21] Appl. N0.:

Henninger, Lester W. Clark, Gerald W. Griffin, Thomas F. I Moran, Howard J. Churchill, Christopher C. Dunham, R. Foreign Application Priority Data Br B 1 n Robert Scobey Nov. 14, 1969 ABSTRACT In a printing adding machine having a totalizer comprising a set of pinions cooperating with a set of racks, a second totalizer is provided for storing a number which is the sum of totals stored in the first totalizer. The second totalizer comprises a R8 0M 65 ll 3. ,0 TG m 0 W 52 3c 26 0 C Sn um 11 2.1 55 [l [58] Field of Search ...235/6O MT, 60 R, 60 P, 58 P,

235/60 TK second set of pinions cooperating with a second set of racks which are connected to the first set of racks for upward and downward movement therewith.

6 Claims, 8 Drawing Figures PATENTEDJUH 6 i972 SHEEI 1 [IF 7 Arrow/[y PATENTEDJUH 6 I872 SHEEI N 0F 7 Arid/61457 PATENTEDJUH s|972 3,667,670

' SHEET SUF 7.

PATENTEDJUH 6 I972 3. 667, 670

SHEET 5 OF 7 Ale/M7 (4 PATENTEDJUH SIHYZ 8,667,670

' SHEET 70F 7 BACKGROUND or THE INVENTION This invention relates to adding machines, and in particular to adding machines of a type having a printing device for recording the progress of a calculation operation on a strip of paper or the like.

In U.S. Pat. No. 3,410,484, there is disclosed a printing adding machine with a reduced keyboard having means for setting 'up digits, a set of vertically movable racks, and a setting up carriage actuated by the means for setting up digits and provided with pins for determining the positions of the racks, as the racks are shifted upwardly, in accordance with the operation of the digit keys. The disclosed machine further includes a totalizer or accumulator comprising a set of gears or pinions respectively engageable with the racks for storing a number; tens transfer means associated with each pinion of the totalizer, adapted to shift downwardly the rack of the next higher unit when the number stored by that pinion reaches ten; and a device for printing each number set up on the machine as well as each total or subtotal. Means are also provided for selecting addition, subtraction, sub-totalizing and grand totalizing operations. In this machine, when the total key is depressed, the total of all the numbers set up or the value stored in the totalizer is printed and at the same time cleared of the totalizer, so that the totalizer is restored to its starting position in which the value stored therein is zero.

However, it often happens when an adding machine is used that, in addition to performing an addition calculation and printing the total on 'a strip of paper by depressing the total key, it would be desirable to perform such totalizing and printing operation a number of times and then to add up such totals to obtain a cumulative total and print the same. In a store, for example, the proprietor may desire to calculate the proceeds of sales for a day, week or month and print the cumulative total, besides calculating the sales for each customer and printing the total on'a strip of paper.

Moreover, it is desirable in many instances that the cumulative total referred to above be recalled in a subsequent calculation operation so as'to effect calculation of numbers including the cumulative total of the previous calculation operation. One may wish, for example, to add up all the sums received during a certain eriod of time to obtain a cumulative total of his income, then add up all the sums paid out during the same period so as to obtain a total of his expenditure, and finally to obtain a balance of income and expenditure.

In various instances, also, it may bedesirable to learn the number of times the totalkey is depressed when the cumulative total is obtained by calculation and printed on a strip of paper. For example, the proprietor of a store may wish to keep records of the total number of customers in addition to obtaining total proceeds of sales by calculation and printing the same for any desired periods of time.

No adding machines have heretofore been developed that are capable of meeting all the foregoing needs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a new and improved printing adding machine capable of storing individual grand totals to calculate a cumulative grand total. Another object is to provide such a machine capable of recalling a cumulative total for subsequent calculation of numbers including that cumulative total. A still further object is to provide such a machine wherein the number of individual grand totals calculated or stored in calculating a cumulative total maybe counted.

To these and other ends, the invention contemplates the provision, for example in an adding machine of the general type disclosed in the aforementioned U.Sv Pat. No. 3,410,484, of a second set of racks respectively connected to, and movable with, the racks of the first set; and a second totalizer or accumulator comprising a second set of gears or pinions that cooperate with the second set of racks in the same manner that the first totalizer gears cooperate with the first set of racks. In this machine, as in that of the aforementioned patent, the totalizing operation involves movement of the first set of racks to positions determined by the pinions of the first totalizer, for printing of the total by printing means associated with these racks, while the first totalizer is concomitantly cleared of the stored total. This step is followed by a return motion of the first racks. During that return motion, the second racks (which move with the first racks) engage the pinions of the second totalizer to store therein the total from the first totalizer. Means are provided for operating the machine to print the cumulative value of totals thus stored in the second totalizer, by movement of the racks to positions determined by the second totalizer, with concomitant clearing of that totalizer.

Further in accordance with the invention, means may be provided forbringing the first totalizer pinions into engagement with the first racks during the cumulative totalizing operation just described, so that the cumulative total from the second totalizer is recalled, i.e., stored back into the first totalizer for calculation with other numbers. As still another feature of the invention, means may be provided for counting each time the pinions of the second totalizer engage the second racks so as to store the number of times the totals are carried over from the first totalizer to the second totalizer.

Further features and advantages of the invention will be apparent from the detailed description hereinbelow set forth, together with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a simplified schematic view of an adding machine embodying the present invention in a particular form;

FIG. 2 is a side view showing mechanisms associated with the total key in the machine of FIG. 1;

FIG. 3 is a plan view showing the mechanism for positioning the cam follower and cumulative total meshing lever;

FIG. 4 is a side view showing the mechanism associated with the cumulative total key and the recall key;

FIG. 4a is a fragmentary side viewshowing the manner in which certain elements of the machine engage each other;

FIG. 5 is a schematic view illustrating features of the counter mechanism;

FIG. 6 is a plan view of mechanism for effecting selection of the cumulative total and counter reset operations; and

FIG. 7 is a side view showing the negative sign shut off mechanism.

DETAILED DESCRIPTION In the drawings, there is shown an embodiment of the inven tion incorporated in a printing adding machine of the type disclosed in the aforementioned US. Pat. No. 3,410,484, to which reference is made fora full description of details of structure, arrangement and operation forming no part of the present invention and here omitted for the sake of simplicity and clarity.

Referring more particularly to FIG. 1, the illustrated machine has a so-called reduced keyboard having the usual digit keys, one of which is shown at 2 in FIG. 1, arranged on a plate 1.

When the digit key 2 is depressed, a number setting lever 3 connected to key 2 pushes backward a corresponding pin 5 (the side .which the digit keys face is the front side). A predetermined number of these pins are arranged in vertical and horizontal rows in a carriage or pin box 4 for sliding horizontal motion backwardly andforwardly. The pin box and the pins 5 housed therein make up means for setting up numbers.

If any number as required is set up by means of the digit keys and then a control key (not shown in FIG. 1) is depressed, the control key will select the calculation operation (e.g.,addition or subtraction) and decide which one of the gears or pinions 7 of an accumulator or totalizer rotatably mounted on a shaft 6 will mesh with a corresponding rack 8.

Although only one rack 8 is shown in FIG. 1, it will be understood that the machine includes a set of such racks, disposed in a side-by-side relation for parallel upward and downward movement, and each associated with a type bar 10 bearing figures for printing. It will further be understood that the totalizermentioned above comprises a plurality or set of pairs of pinions 7 corresponding in number to, and respectively cooperating with, the plurality of racks 8 in the manner described in 'U.S. Pat. No. 3,410,484.

At the same time that the aforementioned control key is depressed, a drive motor 9 is started, operating through means indicated at 9a to drive a shaft 19 and thereby through further linkage indicated at 91;, to effect simultaneous upward movement of rack 8 and of a type bar 10 engaging the rack, all as more fully described in U.S. Pat. No. 3,410,484. The upper limit of this upward movement of the rack and type bar is determined by the projected pin in the pin box 4 which is associated with the rack and which, when projected, engages a heel of the rack to halt upward movement thereof. The distance covered by the rack 8 in its upward movement (as thus restricted by the pin) corresponds to the figure set up by the digit key. In this way, the rack 8moves upwardly together with the type bar till their upward movements are restricted by the pin 5, and then the type bar 10 is pushed by a hammer -ll set in motion and moves to the right to print the corresponding figure on a strip of paper wound around a platen 12. When the type bars 10 are pushed by the hammers 11, only the thus-selected type bars 10 function to print figures and other type bars are left inoperative. Following the printing of the figure, the type bar 10 and rack 8 move downwardly together. At this time, the selected pinion 7 of the totalizer is brought into meshing engagement with the particular rack 8 with which that pinion is associated, so that the number set up as aforementioned can be stored in the totalizer. Since the upward motion of the rack is determined by the figure set up by the key 2, the return (downward) motion of the rack likewise corresponds to that figure, and effects angular displacement of the engaged pinion by a number of teeth or pitches corresponding to the set-up figure, thereby effecting storage of that figure in the totalizer.

The description set forth hereinabove with reference to FIG. 1 refers in brief to the apparatus shown and disclosed in US. Pat. No. 3,410,484, as already stated.

Referring to FIG. 1 again, in accordance with the present invention a second rack 13 is formed integrally with each rack 8 and is disposed parallel thereto. A pinion l4 of a second totalizer adapted to mesh with the corresponding rack 13 is mounted on a shaft 26 for engagement and disengagement with the rack 13. That is to say, in the machine of the invention, a second accumulator or totalizer is also provided, comprising a set of gears or pinions 14 corresponding in number to the racks l3 and respectively positioned and adapted to mesh with the racks 13.

Slides or pawls 22 are associated with the racks and pinions of the machine for effecting transfer of 10s from a particular pinion to the next higher unit when the number stored in that pinion exceeds nine. Other mechanisms of the adding machine according to this invention and the manner of their operations will now be explained.

TOTAL CYCLE In this cycle, the total of numbers stored in the first totalizer or accumulator (pinion 7) is printed when a total key is depressed, with the total being carried over to the second totalizer (pinions 14) and cleared of the first totalizer.

As will be understood by reference to FIGS. 2 and 3, upon depression of a total key 2', a foot 2A of the key 2' comes into in FIG. 3 in whichthe member 16 is shown in a position in which it has moved to the right. The rightward movement of the positioning member 16 causes a cam follower 18, which is connected to a bent end portion 168 of the member 16 by a spring 17, to move to a T position as shown in FIG. 3. When the cam follower 18 is in this position and engages one of a first cam system (indicated at 19a) mounted on the cam shaft 19, the pinion 7 of the first totalizer'meshes with the rack 8 only when the rack has moved to its upper position and the pinion 7 and rack 8 are released from meshing engagement with each other when the rack 8 has moved to its lower position as subsequently to be described.

When the positioning member 16 moves to its position shown in FIG. 3, the positioning member 16, acting through an intermediate lever 45 connected to the member 16 by a spring 43 and adapted to swing about a pivot 44, causes a cumulative total set-up lever 47 which engages at one end 47A thereof a pin 46 provided at one end of the intermediate lever 45) to move in pivotal motion in a clockwise direction about a pivot 48. The clockwise pivotal movement of the lever 47 moves a cumulative total meshing lever 49, which is connected to the other end 478 of the lever 47, to a T position shown in FIG. 3. When the meshing lever 49 is in this position and engages one of a second cam system mounted on a cam shaft 19, the pinion 14 of the second totalizer comes into meshing engagement with the rack 13 only when the rack 8 and type bar 10 are movedto their lower positions as subsequently to be described.

When the cam follower 18 is in its T position as aforementioned,an operating end 18A of the follower 18 is ready to come into engagement with one of the first cam system 19a (only shown schematically in FIG. 2 in the interest of brevity) secured to the cam shaft 19 shown in FIG. 2. Depression of the total key 2 (to effect a totalizing operation, Le. a printing of the total stored up to that time in the pinions 7 and concomitant clearing of the first totalizer) actuates the motor 9 through a switch (not shown) and rotates the cam shaft 19. As a result, the operating end 18A of the cam follower 18 is brought into engagement with a cam of the first cam system mounted on the cam shaft 19, so that the cam follower I8 moved in pivotal motion in a clockwise direction about a shaft 20 in FIG. 2. The clockwise pivotal movement of the cam follower 18, acting through an intermediate member 21 and a lever 34 which is connected to the intermediate member 21 through a slot-and-pin connection and secured to the shaft 6, causes the shaft 6 to rotate, so that the pinion 7 of the first totalizer pivotally mounted on the shaft 6 is brought into engagement with the rack 8, i.e., while the rack and its associated type bar 10 are in their respective lower positions. Then the rack 8 and type bar 10 are moved to their upper positions by the action of a main cam and a spring. The stroke or upper limit of the upward movements of the rack 8 and type bar 10 is determined by a 10s-transfer tooth 7A secured to the pinion striking the lower end of a l0s-transfer pawl 22 following the rotation of the pinions 7 maintained in meshing engagement with the rack 8. This stroke corresponds to the figure stored in the totalizer pinion 7. Thereafter, the corresponding figure of the type bar 10 is printed on a strip of paper. After the completion of printing, the other operating end 18B of the cam follower 18 is brought into engagement with the cam and the cam follower 18 is restored to its original position, thereby releasing the pinion 7 and rack 8 from meshing engagemwnt with each other. Then, the type bar 10 which has completed a printing operation and the rack 8 are moved back down to their lower positions. Thus, the number stored in the pinion 7 is cleared and the totalizer is restored to its starting position (zero position).

Prior to the downward movement of the rack 8 and type bar 10, an intermediate lever 23 shown in FIG. 2 is caused, through the meshing lever 49, to move in pivotal motion in a clockwise direction about a pivot 24 by a cumulative total meshing cam mounted on the cam shaft 19. This causes a driving bar 25 of the pinion 14 of the second accumulator to swing in a counterclockwise direction. As a result, a shaft 26 (FIG. 2)jsecured to the lever 25 swings and brings the pinion 14 of the second totalizer into meshing engagement with the rack 13, i.e., prior to descent of the'racks 8 after the total is printed. In this way, as the rack 8 and type bar 10 move back down to their lower positions, the same value that was stored in the first totalizer is introduced into the pinion 14 of the second totalizer bythe rack 13 which moves downwardly together with the rack 8; i.e., the meshing engagement of pinion 14 with rack 13 causes the pinion 14 to rotate, during descent of the rack, by a number of teeth or pitches corresponding to that value. v

Thus, each time the total of numbers calculated and stored by the cooperative action of the first totalizer pinions 7 and the racks 8 is printed on a strip of paper as the total key is depressed and such total is cleared of the first totalizer, the total is carried over to the second totalizer by the cooperative action of the pinion 14. of the second totalizer and the racks 13 by the process mentioned above, so that the totals can be accumulated in the second totalizer.

CUMULATIVE TOTAL CYCLE In this cycle, the cumulative total or grand total stored in the second totalizer is printed on a strip of paper and cleared of the second totalizer.

Referring to FIG. 4, if a cumulative total key 2" is depressed, a portion 50A of a key member 50 secured to the key 2" pushes a bent projecting portion 51A of a cumulative total set lever 51 as shown in FIG. so that the set lever 51 is shifted horizontally in the direction of the arrow in FIG. 4a and at this time the other end of the set lever 51 causes a cumulative total set-up lever 47 to move in pivotal motion in a clockwise direction as shown in the lower left portion of FIG. 3. This causes the cumulative total meshing lever 49 to move to a GT position shown in the upper left portion of FIG. 3. When the meshing lever 49 is in this position, the meshing engagement of the rack 13 with the pinion 14 of the second totalizer takes place only during upward movement of the racks Sand 13 and type bar 10, with the rack 13 and pinion 14 being released from meshing engagement with each other when the racks 8 and 13 and type bar 10 move downwardly.

Depression of the grand total key 2" actuates the motor 9 through a switch (not shown) in the same manner as does the depression of the total key 2, thereby causing the cam shaft 19 to rotate in a clockwise direction. In the initial stage of this cycle, an operating portion 27A.of a cam 27 mounted on the cam shaft 19 (FIG. 4) pushes an end 28A of a lever 28 and causes the same to move in pivotal motion in counterclockwise direction about a pivot 29. At this time, an inclined rising end portion 288 of the lever 28 moves a member 30 in a direction normal to the plane of FIG. 4 through a pin 31 projecting from the member 30. As a result, the cam follower 18 connected to an end portion 30A .of the member 30 also moves in a direction normal to the plane of FIG. 4 in conjunction with the movement of the member 30, so that the cam follower 18 moves to a +position shown in FIG. 3.

The operating portion 27A of the cam 27 remains in en- 2 gagement with the end 28A of the lever 28 half-way through this cycle. When they are released from engagement with each other in the latter half of the cycle, the cam follower 18 is restored to its original position. The aforementioned movement of the cam follower l8 inhibits the engagement thereof with any one of the first cam system mounted on the cam shaft 19 during this cycle, so that the pinion 7 of the first totalizer are prevented from coming into meshing engagement with the rack 8 during this cycle. However, the shaft 26 is rotated through the cumulative total meshing lever 49, intennediate lever 23 and driving lever 25 by the cumulative total meshing cam of the second cam system mounted on the cam shaft 19 in the initial stage of this cycle (FIG. 2), thereby bringing the pinion 14 of the second totalizer into meshing engagement with the rack 13. Then, the racks 8 and 13'and type bar 10 move upwardly till a tooth 14A provided in a position corresponding tO zero on the pinion 14( FIG. 1) of the second totalizer strikes a tens transfer lever 32, at which time the figure corresponding to the type bar 10 is printed on a strip of paper. In this case, the upward stroke of the type bar 10 corresponds to the figure stored in the second totalizer. After the completion of printing, the pinion 14 of the second totalizer is released from meshing engagement with the rack 13 by the cumulative total meshing cam through the meshing lever 49, intermediate lever 23 and driving lever 25, and then the racks 8 and I3 and type bar 10 are moved to their lower positions. Accordingly, the number stored in the second totalizer is cleared, so that the second totalizer is restored to its starting (zero) position.

RECALL CYCLE This cycle serves to carry the cumulative total stored in the second totalizer back to the first totalizer for calculation and other purposes.

As shown in FIG. 4, if a recall key 2" is depressed, a slider 33 will be pushed and moved downwardly and a projection 33A thereof will push and move downwardly the key member 50 of the cumulative total key 2". As a result, the cumulative total meshing lever 49 is moved to an R position (FIG. 3) corresponding to the GT position as if the key 2" is depressed directly. Likewise, the motor 9 is started. A lower end 33C of the slider 33 acts on a pin 36 provided on a two-arm lever 35 and causes the same to move in pivotal motion in a counterclockwise direction about a pivot 37 against the biasing force of a spring 35. As a result, a pin 38 provided on the end of the other arm of the two-arm lever 35 releases another lever 40 which is urged to move in pivotal motion in a clockwise direction by a spring 39 of weaker biasing force than the spring 35'.

The actuation of the motor 9 as aforementioned causes the cam shaft 19 to rotate, so that the cam follower 18 is moved in a direction normal to the plane of FIG. 4 into a position shown in FIG. 3 through the operating portion 27A of the cam 27, lever 28, inclined upright end portion 28B thereof, pin 31 and member 30, as is the case with the cumulative total cycle. It should be noted that, in this cycle, the cam follower 18 is held in this position till the end of the cycle. This is made possible by the fact that, since a connecting bar 41 integral with the lever 28 also moves in pivotal motion in a counterclockwise direction with the lever 28 and a pin 42 provided in the connecting bar 41 moves toward an end 40A of the lever 40 to be held thereby, the lever 28 cannot return to its original position even if the operating portion 27A of the cam 27 is released from engagement with the end 28A of the lever 28. The slide 33 is held in its lower position till the end of this cycle by the cooperative action of a projection 33B thereof and a member not shown.

It will be appreciated that the meshing engagement of the pinions 7 of the first totalizer with the first set of racks 8 does not take place in the former half of this cycle and takes place in the latter half thereof by virtue of the fact that the cam follower 18 is held in a position shown in FIG. 3.

As aforementioned, when the recall key 2" is depressed, the slide 33 moved downwardly by this key pushes and moves by its projection 33A the key member 50 of the cumulative total key 2". This causes the cumulative total meshing lever 49 to move to an R position (corresponding to the GT position) in the same manner as described with reference to the cumulative total cycle, so that the meshing engagement of the pinion 14 with the rack 13 takes place only when the racks 8 and 13 and type bar 10 move upwardly. Thus, if the racks 8 and 13 and type bar 10 move to their upper positions as the motor 9 is set in motion, then the pinion 14 of the second totalizer will be brought into meshing engagement with the rack 13 and the pinions 7 of the first totalizer will not be brought into meshing engagement with the racks 8. The racks and type bar move upwardly till the tooth 14A of the pinion 14 strikes the tens transfer lever 32 as in the cumulative total cycle, and printing is effected on a strip of paper. During the downward movement of the racks 8 and 13 and type bar 10, the pinion 7 of the first totalizer is brought into meshing engagement with the rack 8 and the pinion 14 of the second totalizer is released from meshing engagement with the rack 13. Thus, the number stored in the second totalizer is carried back to the first totalizer. If a number is already stored in the first totalizer at this time, the calculation of the number carried back from the second totalizer and the number stored in the first totalizer is effected.

COUNTER MECHANISM This mechanism is provided in order to count the number of times that figures are introduced into the second totalizer of the cumulative total mechanism for producing a cumulative total of these figures in the second totalizer.

The counter mechanism comprises, as shown in FIG. 5, a counter set lever 52 which is secured to the shaft 26 mounting the pinion 14 f the second totalizer for engagement and dis engagement with the rack 13. Provided near the lever 52 is an actuating bar 53 having a projection 53A which is maintained in contact with the lever 52. The bar 53, which is formed with a slot 538 receiving therein a pin 54, is slidable to right and left as guided by a guide portion 55 by virtue of the engagement of the pin 54 in the slot 53B. 56 designates a tension spring which is effective to bring the bar 53 into engagement with the guide portion 55 and restore the same to its original position.

The mechanism also comprises a counter set cam 57 mounted on the cam shaft 19, and a lever 58 is provided near the cam 57 for pivotal movement about a pivot 59. The lever 58 is under the action of a tension spring 60 and normally engages, at an operating end 58A thereof, the counter set cam 57. The lever 58 has another operating end 58B which engages an offset portion at one end 53C of the aforementioned actuating bar 53 which has its other end 53D juxtaposed to a counter feed lever 61.

When the shaft 26 has rotated so that the pinion 14 of the second totalizer is brought into engagement with the corresponding rack 13, the counter set lever 52 is disposed in a position shown in FIG. 5. At this time, the lever 58 is moved in pivotal motion in a counterclockwise direction by the cam 57 each time the shaft 19 is rotated by the motor 9 as the motor is operated, so that the operating end 588 of the lever 58 pushes and moves the end 53C of the actuating bar 53 to the right in FIG. and the other end 53D of the bar 53 pushes the counter feed lever 61, which effects the desired counted operation, as will be understood, through suitable instrumentalities not shown in FIG. 5.

When the shaft 26 is brought to an angular position in which the pinion l4 and rack 13 are spaced apart from each other, the lever 52 moves upwardly in pivotal motion in the direction of the arrow (FIG. 5), thereby pushing and moving the actuating bar 53 upwardly. As a result, the end 53C of the actuating bar 53 and the actuating end 58B of the lever 58 are released from engagement with each other. Thus, if the cam shaft 19 rotates and the cam 57 causes the lever 58 to move in pivotal motion at this time, the movement of the actuating end 588 of the lever 58 will not be transmitted to the actuating bar 53.

From the foregoing description, it will be appreciated that counting is effected in the cycle in which the pinion 14 of the second totalizer is maintained in meshing engagement with the rack 13 or the cycle in which the number stored in the first totalizer is carried over to the secondtotalizer, and that counting is not effected in any other cycle. It is possible, if desired, to arrange that the cam 57 cause the lever 58 to move in pivotal motion in the latter half of the cycle, so that counting is not effected in the cumulative total cycle and recall cycle in which the pinion l4 and rack 13 mesh with each other in the former half of the cycle.

MECHANISM FOR SELECTING THE CUMULATIVE TOTAL OPERATION AND COUNTER RESET OPERATION This mechanism functions such that the action of the cumulative total set lever 51, which is set in motion in the total, cumulative total and recall cycles described above, is controlled for selectively bringing about any one of the following states:

a. A state in which a number is not introduced into the pinion 14 of the second totalizer and cannot be taken out of it, and resetting of the counter mechanism cannot be effected;

b. A state in which a number is introduced into the pinion of the second totalizer but cannot be taken out of it, and resetting of the counter mechanism cannot be effected; and

c. A state in which a number can be freely introduced into and taken out of the pinion 14 of the second totalizer, and resetting of the counter mechanism can be effected.

As shown in FIG. 6, a select lever 62 is mounted for sliding motion in a direction normal to the longitudinal axis of the cumulative total set lever 51. The select bar 62 is formed at one end with offset portions 62A and 628 which are juxtaposed to a rising portion 518 provided on the set lever 51. Means for causing the offset portions 62A and 628 to engage the ring portion 51B on the set lever 51 includes a positioning projection 62C and a spring 63 adapted to engage the projection 62C. An end 62D of an arm projecting from the select lever 62 can be inserted in a space below a reset button 65 of a counter 64, which is associated with lever 61 for counting the number of totals transferred to the second totalizer as already described. 62E denotes a handle for operating the select lever 62.

The select lever 62 is shown in FIG. 6 in a position for bringing about the state (c) referred to above. When the select lever 62 is in this position, the cumulative total set lever 51 is free to move and the reset button 65 can be operated freely. If the handle 62E is operated to move the select lever 62 upwardly into a position in which the offset portion 62A locks the rising portion 51B, then the set lever 51 can move a certain distance, so that the cumulative total meshing lever 49 can be moved to a shown in the upper left portion of FIG. 3, but cannot be moved to theGT and R positions. At this time, the end 62D of the arm of the select lever 62 is disposed below the reset button 65 of the counter 64, thereby preventing the reset button 65 from being depressed. With the offset portion 62A being in engagement with the rising portion 518, the state (b) referred to above can be brought about.

Further upward movement of the select lever 62 brings the offset portion 628 into engagement with the rising portion 51B, thereby rendering the set lever 51 unoperative. At this time too, the end 62D of the arm of the select lever 62 is disposed below the set button of the counter 64. With the offset portion 62B being in engagement with the rising portion 518, the state (a) referred to above can be brought about.

In the state (a) referred to above, it is possible to retain the cumulative total stored in the second totalizer and the number in the counter at a certain time without being affected by subsequent calculation operations. In the state (b), the cumulative total stored in the second totalizer and the number in the counter can be retained without being cleared by mistake.

It is to be understood that the end 62D of the arm of the select lever 62 for locking the reset button 65 of the counter may be made independent of the select lever 62 for controlling the reset button 65 irrespective of the position of the select lever 62.

TENS TRANSFER IN THE SECOND TOTALIZER When the number accumulated in one of the pinions 14 of the second totalizer exceeds nine, the tooth 14A (FIG. 1) provided in the zero position of the pinion 14 moves the tens transfer lever 32 in pivotal motion in a clockwise direction, and causes lever 32 to act against a projection 22A of the tens transfer pawl 22 so as to move pawl 22 to the right. This causes a pin 8A secured to the rack 8 for the immediately higher unit to be released from engagement with the shoulder of the tens transfer pawl 22. As a result, the last-mentioned rack 8, and the particular rack 13 connected thereto, move downwardly a distance corresponding to one tooth or pitch of the pinion 14 by virtue of the biasing force of a spring 66. When this occurs, the pinion 14 for the immediately higher unitwhich engages the last-mentioned rack 13 is rotated a distance corresponding to one tooth or pitch, thereby completing the tens transfer operation.

It will be understood that tens transfer in the pinions 7 of the first totalizer is effected in like manner by the pawls 22. As already described, when the cam follower 18 is in the +position (for example), the pinions 7 are held out of engagement with racks 8 during upward movement of the racks, but a selected one of the two pinions 7 associated with a rack 8 comes into engagement with the rack during the return or downward movement of the rack for storing a number, this cycle being governed by a cam on the motor-driven shaft 19 while the up and down movement of the rack is also governed by a cam on the shaft 19 as in the case of the other cycles herein described. lncident to such operation (i.e., while the pinions 7 are in meshing engagement with the racks 8 during descent of the racks), when the figure stored in any of the pinions 7 exceeds nine, the special tooth or projection 7A of that pinion engages the associated pawl 22 so as to move that pawl 22 to the right as seen in FIG. 1. This causes the pin 8A secured to the rack 8 for the immediately higher unit to' be released from engagement with the shoulder of pawl 22; the rack 8 thus released drops by a distance corresponding to one tooth or pitch of its associated pinion 7 under the biasing force of spring 66, thereby advancing the last-mentioned pinion (which is in mesh with the rack) to complete the transfer of tens operation. As will be apparent to those skilled in the art, in each of the described sets of racks and pinions, successive racks (and successive pinions) represent successively higher units or orders, e.g., s, 100s, 1,000s and so on.

CYCLES IN WHICH THE NUMBER IN THE FIRST TOTALIZER IS NEGATIVE 1. Total Cycle In the illustrated embodiment of the invention, the second totalizer comprises one pinion 14 for each rack 13, and hence only positive numbers can be stored therein. Introduction of negative numbers must be precluded.

As aforementioned, depression of the total key moves the cumulative total meshing lever 49 to the T position through the positioning member 16, spring 43, intermediate lever 45 and cumulative total set-up lever 47 as aforementioned (FIG. 3). If the number stored in the first totalizer is positive, an inhibiting member 67 is in a position shown in solid lines in FIG. 3 and the pivotal movement of the intermediate lever 45 is not precluded, so that the aforementioned process takes place. However, when the number stored in the first totalizer is negative, the inhibiting member 67 is moved to a position shown in broken lines in FIG. 3, by a mechanism not shown. If the total key is depressed at this time and the positioning member 16 moves to the right, the intermediate member 45 is prevented from moving in pivotal motion by the inhibiting member 67 which is in the broken line position. Therefore, transmission of a signal by the total key is precluded, the cumulative total I 2. Cumulative Total Cycle and Recall Cycle When the number stored in the first'totalizer is negative, the sign to be printedis negative. Therefore, if the cumulative total key or recall key is depressed at this time, the figure to be printed by this key would also be negative. Means, now to be described, are provided for preventing this.

When the cumulative total set-up lever 47 moves in pivotal motion in a clockwise direction following depression of the cumulative total key or recall key, a projection 47C of the lever 47 pushes a pin 69 on a change-over stopper 68 shown in FIG. 7 and causes the stopper 68 to swing in the same direction as the lever 47. This brings the forward end of the stopper 68 into locking engagement with a pawl 70A of a change-over lever 70 for controlling the engagement of the positive and negative pinions 7 of the first totalizer with the racks 8. By this arrangement, the change-over lever 70 is prevented from coming into engagement with depressed portions of a change-over cam mounted on the cam shaft 19. Thus, the provision of the negative sign is prevented and only the positive sign is printed,

FUNCTION OF THE MEMBER 30 It has already been stated that, in the cumulative total cycle and recall cycle, the cam follower 18 is moved through the lever 28 and member 30 by the cam 27 on shaft 19 (FIG. 4), so as thereby to control the intermeshing of the pinions of the first totalizer and the racks 8. The function of the member 30 in this and other operations will be explained in more detail.

Referring further to FIG. 4, if the cumulative total key 2" or recall key 2" is depressed, then the key member 50 is pushed and moved downwardly in either case as aforementioned. At this time, the key member 50 pushes one arm 71A of a lever 71 so as to move the lever 71 in pivotal motion in a counterclockwise direction. This causes the other end 713 of the lever 71 to extend to the back side of an end 3013 of the member 30 so as to lock the end portion of the member 30. Thus, when the lever 28 is caused to move in pivotal motion in a counterclockwise direction by the actuating portion 27A of the cam 27 and the member 30 is moved in a direction normal to the plane of FIG. 4 by the upright end portion 288 of the lever 28 through the pin 31, the end 30B of the member is locked in position as aforementioned and therefore does not move, thereby acting as a pivot. This permits the other end 30A of the member 30 to move a relatively large distance, thereby moving the cam follower 18 a relatively large distance. When the carriage or pin box 4 is moved step by step by depressing the digit keys, the end 30B of the member 30 is moved in a direction normal to the plane of FIG. 4 by a mechanism (not shown) operatively associated with the step-by-step movement of the pin box till the end 308 is brought to a side-by-side relationship with the arm 71B of the lever 71. Therefore, the arm 71B of the lever 71 is disposed below the end 303 of the member 30 in FIG. 4, thereby preventing the bar 71 from moving in pivotal motion in a counterclockwise direction. As a result, the key member 50 is prevented from moving downwardly. Stated differently, the cumulative total key 2" and recall key 2" do not move downwardly even though they are depressed while numbers are set up in the pin box. This arrangement makes it possible to prevent misoperations. It is to be understood that all the movements performed through the member 30 are performed by the power supplied by the motor, so that it is not necessary to depress the keys with a greater force than is normally required.

What is claimed is;

1. An adding machine comprising a. means for setting up digits;

b. a first set of vertically movable racks cooperating with the setting up means;

c. a first totalizer comprising a first set of number-storing pinions respectively cooperating with said first racks;

d. a second set of racks respectively connected to and movable with said first racks;

e. a second totalizer comprising a second set of numberstoring pinions respectively cooperating with said second racks;

f. tens transfer means cooperating with each of said totalizers for effecting number-storing advance of a pinion when an adjacent pinion of the same totalizer stores a number exceeding nine; and

g. means for selectively effecting meshing engagement and disengagement of said first and second totalizer pinions with said first and second sets of racks, respectively, for storing numbers in and clearing numbers from said totalizers, and for transferring stored numbers from one totalizer to the other through movement of said racks.

2. An adding machine as defined in claim 1, wherein said means for selectively efiecting engagement and disengagement of said totalizers and said racks includes a. means, including a total key and a cumulative total key,

for effecting selection of a desired operation to be performed by the machine;

b. cam means, including a cam system and a cam follower cooperating therewith, for effecting engagement of the first-totalizer pinions with the first racks; and

c. means, including a meshing lever responsive to depression of one of said keys, for controlling engagement of the second-totalizer pinions with the second racks.

3. An adding machine as defined in claim 2, wherein said first totalizer includes pinions adapted to store negative numbers, and further including means for preventing transfer of a negative number from said first totalizer to said second totalnet.

4. An adding machine as defined in claim 2, further includa. means, including a 'member controlled by a motoroperated cam,,for moving said cam follower to control engagement thereof with said cam system;

a recall key for effecting transfer of stored numbers from the second totalizer to the first totalizer; and

c. a lever, operated by depression of said cumulative total key and by depression of said recall key, for locking one end of said member for pivotal movement of said member about said one locked end;

d. said member locking said lever, during operation of said means for setting up digits, for preventing depression of said cumulative total and recall keys while digits are being set up.

5. An adding machine as defined in claim 2, further including means responsive to movement of said second-totalizer pinions into engagement with said second racks, for counting the number of times such engagement is effected, thereby to provide a count of the number of times a stored total is trans ferred from said first totalizer to said second totalizer.

6. An adding machine as defined in claim 2, further includmg a. means for transmitting to said meshing lever a control signal representative of depression of a key; and

b. means acting on said last-mentioned means for controlling transfer of numbers to and from said second totalizer.

Claims (6)

1. An adding machine comprising a. means for setting up digits; b. a first set of vertically movable racks cooperating with the setting up means; c. a first totalizer comprising a first set of number-storing pinions respectively cooperating with said first racks; d. a second set of racks respectively connected to and movable with said first racks; e. a second totalizer comprising a second set of number-storing pinions respectively cooperating with said second racks; f. tens transfer means cooperating with each of said totalizers for effecting number-storing advance of a pinion when an adjacent pinion of the same totalizer stores a number exceeding nine; and g. means for selectively effecting meshing engagement and disengagement of said first and second totalizer pinions with said first and second sets of racks, respectively, for storing numbers in and clearing numbers from said totalizers, and for transferring stored numbers from one totalizer to the other through movement of said racks.

2. An adding machine as defined in claim 1, wherein said means for selectively effecting engagement and disengagement of said totalizers and said racks includes a. means, including a total key and a cumulative total key, for effecting selection of a desired operation to be performed by the machine; b. cam means, including a cam system and a cam follower cooperating therewith, for effecting engagement of the first-totalizer pinions with the first racks; and c. means, including a meshing lever responsive to depression of one of said keys, for controlling engagement of the second-totalizer pinions with the second racks.

3. An adding machine as defined in claim 2, wherein said first totalizer includes pinions adapted to store negative numbers, and further including means for preventing transfer of a negative number from said first totalizer to said second totalizer.

4. An adding machine as defined in claim 2, further including a. means, including a member controlled by a motor-operated cam, for moving said cam follower to control engagement thereof with said cam system; a recall key for effecting transfer of stored numbeRs from the second totalizer to the first totalizer; and c. a lever, operated by depression of said cumulative total key and by depression of said recall key, for locking one end of said member for pivotal movement of said member about said one locked end; d. said member locking said lever, during operation of said means for setting up digits, for preventing depression of said cumulative total and recall keys while digits are being set up.

5. An adding machine as defined in claim 2, further including means responsive to movement of said second-totalizer pinions into engagement with said second racks, for counting the number of times such engagement is effected, thereby to provide a count of the number of times a stored total is transferred from said first totalizer to said second totalizer.

6. An adding machine as defined in claim 2, further including a. means for transmitting to said meshing lever a control signal representative of depression of a key; and b. means acting on said last-mentioned means for controlling transfer of numbers to and from said second totalizer.

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