US2558458A - Combined typewriting and computing - Google Patents

Description

June 26, 1951 H. l.. PlTMAN 2,558,458

COMBINED TYPEWRITNG AND COMPUTING MACHINE Filed Jan. 16, 1948 e shams-sheet 1 M ormmlm Tw@ bln w fu June 26, 1951 H. l.. PITMAN 2,558,458

COMBINED TYPEWRITING AND COMPUTING MACHINE Filed Jan. 16, 1948 6 Shee'cs-Sheea'cl 2 ATTO R N EY BY 0.7M?

June 26, 1951 H. L. PITMAN COMBINED TYPEWRITING AND COMPUTING MACHINE 6 Sheets-Sheet 3 Filed Jan. 16, 1948 I INVENTOR' #5N/QV p/MA/V BY a @Am June 26, 1951 H. PITMAN 2,558,458

COMBINED TYPEWRITING AND COMPUTING MACHINE Filed Jan. 16, 1948 6 Sheets-Sheet 4 BY afm ATTO R N EY June 26, 1951 1H. l.. PITMAN 2,558,458

- COMBINED TYPEWRITING AND COMPUTING MACHINE Filed Jan. 16, 1948 6 Sheets-Sheet 5 INVENTOR afm ATTOR N E Y June 26, 1951 H. PITMAN 2,558,458

COMBINED TYPEWRITING AND COMPUTING MACHINE Filed Jan. 16, 1948 6 Sheets-Sheet 6 i BY @faQ/;

ATTORNEY Patented .une 26, 1951 Uiiiii attain COMBINED TYPEVVRITING AND COMPUTING MACHINE Henry L. Pitman, Melbourne, Fla., assignor to Underwood Corporation, New York, N. Y., a

corporation of Delaware Application January 16, 1948, Serial No. 2,654

11 Claims. l

rhis invention relates to combined typewriting and computing machines and more particularly to machines wherein a single keyboard is employed, such as found on ordinary typewriters.

Machines of the type with which this invention is particularly concerned comprise a computing base surmounted by a typewriter cooperating therewith. Within the base are normally contained a plurality of registers located in lateral alignment across the front thereof. For running amounts into the wheels of the registers, there is provided a. set of rack bars for each register.

. The typewriter carriage is provided with a plurality of column units extending' horizontally from the rear thereof, and as the carriage moves into a computing zone corresponding to a column on the work sheet, one of the column units, which may carry a plurality of dogs, depresses a vertically extending plate, thereby selecting one of the registers for operation. If the column unit carries more than one register-selecting dog, then, of course, more than one register will be selected for operation.

The rack. hars which actuate the wheels oi the registers are provided with indexing pins which are set in accordance with the depression of numeral keys of the typewriter. When a numeral key is depressed, the digit represented by said key is printed and the digit value is also indexed in one of the rack bars. Machines of the character with which this invention is concerned are normally provided with a continuously operating power source and a one-revolution clutch which, when engaged, connects a cycling general operator to the constantly rotating power source. After all oi the digits of an amount have been selected, the one-revolution clutch is engaged thereby cycling the machine and running the selected and indexed amounts into the wheels of the selected register or registers.

With machines of the type with which this invention is concerned, itis possible to automatically print totals. That is to say, after one or more amounts have been entered into a register, the amount then standing in the wheels of the register may be automatically read out and printed. For accomplishing this purpose, a set of totalreading feelers is provided for each register and each register wheel is provided with a spiral arrangement of stops. When it is desired to print a total, the set of feelers is released and the individual feelers ci the set move forward into engagement with the stops, the amount of forward movement being .determined by the particular digits standing in the wheels. These different forward positions of the feelers are then employed in selecting the amount to be printed.

The machine is also provided with a fugitiveone mechanism, making it capable of recording and printing true overdraits as well as true positive amounts.

The general form of the machine, as set forth above, is well known and is exemplified in my prior Patent No. 2,372,681, among others. The particular embodiment or" the machine over which this invention is an improvement is set forth in my copending application Serial No. 494,434, filed July l0, 1943, now Patent No. 2,436,055.

In said application Serial No. 494,434, there is illustrated a combined typewriting and computing machine having three register groups, each group comprising two registers. The two registers are obtained for each group by the expedient of interspersing the wheels of the registers so that the wheels oi the two registers corresponding to the same denominational order are juxtaposed. One of the two interspersed registers of each group may be selected by laterally shifting the group so that the wheels of one register will be aligned with the register bars when the group is in one lateral position, and the wheels of the other register will be aligned with the register bars when the group is in its second lateral position.

As disclosed in said application Serial No. 494,434, the machine has a total capacity of siX registers. That is to say, it is possible to work in one group of three registers or another group of three registers. If the groups of registers be designated A, B and C, then group A will contain registers AI and A2, group B will contain registers Bi and B2 and group C will contain registers CI and C2. In the machine set forth in application Serial No. 494,434, it is possible to work in registers AI, Bl and/,or Cl or in registers A2, B2 and/or C2, but it is not possible to work, for example, in registers Al and B2 at the same time, because all three groups of registers are tied together and are laterally shifted as a unit.

By means or" the present invention, I have provided three groups of registers, each group containing three (rather than two as set forth above) registers. For convenience, these registers may be designated as above, except, of course, here we have registers .43, B3 and C3 in addition to the other registers.

This invention provides means for selecting for computing any one register of any group for 3 operation at the same time as any one register of any other group. That is to say, in accordance with this invention, it is possible to Work for example, or compute, in registers Al, B2 and/or C3 at the same time.

Thus it will 4be seen that the invention set forth in this application adds considerably to the ilexibiuty of tne'machine. Not only has the machines capacity been increased fromsiX registers to nine registers, but itis also possible to compute in more different combinations of registers at the same time.

It is another feature of the invention to provide an improved means for preventing cycling of the machine during the time that relative movement is taking place between a register group and the set of diiierential actuators for Said group.

it is likewise a feature of the invention that all of the register groups are locked in their selected positions while the machine is being cycled so that itowill not be possible to accidentally cause a relative'movement between a register group and' its set'of diierential actuators during the time that the actuators are in engagement with the wheels of one of the registers of the group.

Another feature of the invention is to provide reliably operative means for preventing release of the total-readingfeelers during the time that a relative'lateralmovement is taking place between al register group and the set of total-reading.

feelers for said group.

V'The' present invention oiiers the still further advantageof providing a simple yet reliably operative means for locling all of the register groups their selected positions during the time that theto'ta'l-'reading feelers are in engagement with the wheelsfcf one of the registers of one of the groups. o' .Y

These and other objects, features and advantageswill more readily appear as the description of one specii'lc 'embodiment of the invention proceeds'.

Referring now to the drawings:

Figfl is a side elevation of a combined typewriting and computing machine, certain parts being shown in cross section and many parts being entirely omitted in order to moreclearly show the present invention,

Fig. 2 is a plan View of the mechanism ein-- ployed for individually shifting each register group'independently of the other register groups, Fig. 3 is a perspective view ofopartof the mechanism shown in Fig. 2,

Fig. is also a perspective view` of part of the mechanism shown in Fig. 2 and constitutes a continuation ofv Fig. 3. v Y Y Fig. 5 is a diagrammatic View of a cam and cam follower structure used in shifting the register groups, Y

Fig. 6 is a perspective view of the mechanism employed in preventing the machine from being cycled when a register is not fully selected and for preventing the total-reading feelers from advancing when' a register is not fully selected and also showing a means for locking the register groups in their selected position while the machine isbeinrg 'cycled or while the total-reading feelers areadvanced,

Fig. '7 is an enlarged detail view of certain of the parts shown in Fig. 6,"

Fig.A 8 is adetail view of certain parts shownein Fig.V 7, i V

Eig. 9,is a perspective view of one of the regis- @er einem, and. @stampare of the tens.. @een over and fugitive-one mechanism, many of the parts having been omitted for greater clarity, and

Fig. l0 is an enlarged perspectiveview of a portion of the mechanism for returning the registers to their normal or unshifted positions.

Typewriter unit in general The typewriter unit T is shown in Fig. l stripped of all but its bare essentials, since the details thereof have no bearing upon the present invention. The unit T may conveniently be constructed as shown in my prior Patent No. 2,398,395, but it will, of course, be understood that numerous changes as to details may be made without departing from the spirit of the present invention.

` Briefly described, the typewriter unit comprises a row of numeral keys lil, any one of which, when depressed, rocks a draw-link il into engagement with a continuously rotating snatch roll I2. 'Upon engagement with the snatch roll, the drawlink i l is pulled toward the rear of the machine thereby rotating counterclockwise, as viewed in Fig. l, a lever i3 to which itis pivotally connected. The lever I3 is connected by a linl to a pivotally mounted numeral type bar lli, which is rotated clockwise 4by the counterclockwise rotation of lever I3, to strike the platen I5` carried by a movably mounted carriage generally indicated at Iii. rEhe carriage is continuously urged toward the left side of the machine by a spring motor generally indicated at i7 and, upon actuation of a type bar It, an escapement mechanism generally indicated at I8, which may be of any desired construction, is operated to permit the carriagev to move one letter space to the left.

Computing oase in, general The typewriter unit T surmounts and cooper: ates with a computing base generally indicated in Fig. l at B. The computing base comprises in general three sets of diiierential actuators consisting of pin bars I9 carrying rack teeth 20 on the forward ends thereof. Permanently in mesh with the rack teeth are idler wheels 2l. Groups 22 (Fig. 9) of computing wheels 23, are movable into engagement with the idlers for subtraction or into direct engagement with the differentialv actuators for addition, as will presently bem-ore fully explained.

The differential actuators are normally positioned so that digit pins 25 carried thereby, are out of operative alignment with a groupV of pin setting bars generally indicated at 25. i

Register group selection The typewriter carriage I6` is provided with a` column unit, generally designated 26, extending horizontally from the rear thereof. There is one column unit for each zone in which a column of figures is to be printed. 'Each column unit is provided with one or more register group selecting dogs 2l and with a denomination selecting tooth 28. As the'carriage is tabulated into a column printing zone, the register group selecting dog 27 depresses a plate 29, which, through well-known connections such as shown inPatet No. 2,400,949, issued May 28, 1946, to R. W. Pitman, and shown here only in dot-and-dash lines, raises a group of couplers 30 to a position such that when the,l couplers are moved forward, they will, push the differential actuators forward to leperatively align the pins 24 with the pin. setting ars 5.

The couplers are pivotally connected to a set of distributive racks 3| which are individually articulated to a set of transverse blades, not shown. Also connected to said transverse blades are a set of master racks 32 which are pushed forward seriatim by a set of bell cranks 33. For operating the bell cranks 33, there is provided a set of push rods 34 which are actuated by a universal set of vertical jacks 35.

As the typewriter carriage traverses a computing zone, the denomination selecting tooth 28 depresses one of the vertical jacks 35 at each letter space. The jack in turn, through the push rod 34, operates the bell crank 33 to move one of the master racks 32 forward and, through their connections with the transverse blades, one of the distributive racks BI for each cf the groups of registers is moved forward. If a register group has been selected for operation by raising the couplers 39 for that register group, one of the pin bars I9 will be moved slightly forward to align the pins 24 with the pin setting bars 25. rhen upon operation of one of the numeral keys Il, a pendant member 3% on the lever I3 will be moved downward toengage a crank arm, not shown, on a rack shaft 3l to thereby depress the corresponding pin setting bar 25 and push one of the pins 24 through the bar I9. After the pin has been set in a bar i9, the carriage steps one letter space to the left, thereby releasing the jack 35 and allowing the bar I9 to be moved to the rear by a spring 39, and the operation is repeated for each digit of the number. Thus it will be noted that when a numeral key I9 is depressed at a time when the carriage is in a computing zone, the digit corresponding to that key will be printed and the pin 24 corresponding to the digit will be set. The details of construction ofthe above described indexing mechanism are more fully explained in my prior Patent No. 2,202,671.

After all the digits of a number have been indexed in the bars I9, the next step is to run the number into the wheels of the selected register or registers, and for this purpose, a general operator bar 39 is employed. rIhe bar 39 is operatively connected, as described in my prior Patent No. 2,168,538, to a side plate 45, Figs. l and 6, which in turn is connected by a crank 4I to a shaft 42, Fig. 6. After the lowest order digit has been indexed as described above, the carriage steps to the space next beyond the lowest order space whereupon the tooth 29 depresses a jack, not shown, but similar to denominational jacks 35, to raise a latch arm 35', Fig. 2, and thereby cause a one-revolution clutch diagrammatically illustrated at 43 to become engaged as described in my prior Patent No. 2,178,702. Engagement of clutch 43 connects the shaft 42 to a source of power, not shown, whereupon the shaft is driven through one complete revolution at which time the clutch is automatically disengaged. Rotation of the shaft 42 causes the crank 4! to move the side plate 45 and thereby the general operator bar 39 from the position shown in Fig. l toward the front of the machine and back to the Fig. l position, all as more particularly described in my prior Patent No. 2,168,538 referred to above.

As the general operator bar 39 is moved forward, it picks up any of the bars I9 in which an index pin 24 has been set, or pushed through, and moves the bar I9 so picked up toward the front of the machine. rJhe rack teeth 25 rotate the idler wheels 2l. If the computing wheels 23 have been moved into direct engagement with the rack teeth 20, in a manner such as set forth in my copending application Serial No. 494,434, said wheels will be rotated in an additive direction by an amount corresponding vto the digits indexed in the bars I9. Likewise if the computing wheels 23 are moved into engagement with the idlers 2l, then upon forward movement of the bars I9, the computing wheels will be rotated in a subtractive direction. Whether the wheels of a register group move into an additive or subtractive position is determined by the position of a state control slide, partially shown in Fig. 1 at 44. State control slide 44 is continuously urged toward the front of the machine by a spring and is released for forward movement by carriage controlled latches, not shown, as more fully described in my prior Patent No. 2,118,860.

T6125' Caf T 1101281 As described in my copending application Serial No. 494,434, the general operator bar 39 is provided with a series of pivotally mounted levers only partially shown herein at 45 and as the general operator bar moves forward, it is the upper ends of these levers which actually come in contact with the set index pins 24. When a computing wheel 23 rotates through a transfer point, it is operative, as will be described later, to rock counterclockwise, Fig. l, a lever 46, which in turn raises the forward end of a bar 4l' from latching engagement with a transverse bar 48. Bar 4'! is pivotally connected to a stationarily fulcrumed lever partially shown at 49, and corresponding to lever 86 in my copending application Serial No. 494,434. Upon its disengagement from transverse bar 48, the carryover bar 41 is moved forwardly by its spring 50 and thereby turns lever 49 counterclockwise so that an end of said lever is in the path of an end of lever 45 to cause lever 45 to be rocked counterclockwise when the two levers come into engagement. This rocking of lever 45 relative to the general operator bar moves the next higher bar I9 an extra carryover step forward, all as more fully set forth in my copending application Serial No. 494,434. The levers 45, bars 41, levers 49 and levers 45 thus constitute a set of carryover devices.

Register group details In the machine of this invention, instead of providing three registers across the front of the machine as shown in my prior Patent No. 2,372,681, I have here provided three register groups, each group consisting of three registers. Since the details of construction of the register groups per se are substantially identical with the register groups of my copending application Serial No. 494,434, reference is hereby made to said application for those details.

Referring now to Figure 9, a group of computing wheels, only one of which is shown, is generally indicated at 22. The individual wheels 23 of the group are coaxially mounted for inden pendent rotation on a shaft 5I. The shaft 5I is rigidly secured to a pair of side plates 52 and projects beyond said plates for a reason which will presently become apparent. Rigidly attached to each wheel 23, so that it may be conn sidered a part thereof, is a disk 53 carrying a spiral array of stops as fully explained in my copending application Serial No. 494,434.

To more securely hold the plates 52 together and form a frame for the group of register wheels,

cross rods d and 55 are secured between said plates. On the rod 55 is mounted a detent pawl 55 for each wheel 25. The pawl 55 is urged by a spring 5l, anchored to a saddle 58 on cross rod 5d, toward the wheel 23 so that a curved end portion of the pawl lies between the teeth of the wheel to thereby constitute a drag on said wheel and prevent the wheel from being inadvertently turned due to frictional engagement with an adjacent wheel which is being deliberately operated. rihe pawls 5S also serve the additional function of indicating when a register is clear, as explained in my aforesaid copending application Serial No. 494,434.

Also mounted upon rod 55 is a carryover trip lever 59 for each computing wheel which is urged toward the wheel 23 by a spring 59 anchored to saddle 59. The lever 55 is provided with a tail portion 5l, for a purpose to be presently described, and with Ia portion ,5 2 which lies in the rotative path of a carryover pin 63 forming a part of wheel 23, and mounted in the disc 53 thereof.

As described above, and as will be readily apparent from an inspection of Figs. 2 and 6, there are provided in the present machine three sets or groups or" registers aligned transversely across the front of the machine. Each group of registers is individually mounted between a pair or" mounting plates 54 (see Fig. 3) xed to the base or" the machine. Extending between the mounting plates 5d is a shaft 95, Fig. 1, upon which are rotatably mounted the idler wheels 2i referred to above.

Between the mounting plates 55 is a frame consisting of plates 56 secured together by a cross shaft 5l and a tie-rod 58 and it is this frame in which the register group is supported. Each plate 59 is provided with a vertical slot 59 open at the top and into which the extended ends of shaft 5| are loosely fitted. Each plate 55 is also provided at the rear thereof with a horizontal slot 'l0 which ts about a roller l! mounted upon the idler wheel shaft E5. The frame comp-rising the plates 55 can be rocked downwardly about the rollers Ei as an axis by depression of a bifurcated tongue "l2, Fig. 9, the Vslotted end of which straddles the cross shaft 5l. Downward movement of the frame plates 55 will result in the computing wheels 22 being meshed with the rack teeth 29 as will be evident from an inspection of Fig. l.. To place the wheels 22 in engagement with the idlers 2i, the frame plates 55 are moved rearwardly so that the rollers 'il are positioned in the bottom of the horizontal slots i9. Plates 55 are moved rearwardly by the links partially shown at l.

rihe tongue l2 and the links i3 are selec vely conne-stable to a shaft, a partial cross section of which is indicated at 'ill in Figure 1. Since the speciiic arrangement whereby the computing wheels are moved to additive or subtractive position forms no part of the present invention, the arrangement is not shown in the present drawings but reference may be had to my copending application Serial No. 494,434 for the details thereof, it being suicient to statehere that the selective engagement of the wheels for addition or subtraction is determined by the position of state control slide 54.

In each register group there are three computing wheels 23 for each denominational order. All the wheels of the group are mounted upon the shaft 5i and the three wheels for each order are juxtaposed. A register group may then be said to consist of three registers which are operable in three diiferent lateral positions. For placing the register group in its three lateral positions, the plates 52, carrying the shaft V5I and wheels 22, are shiftable by a means to be presently explained, it being sufficient here to state that the shaft 5l and cross rod 55 slide longitudinally through the frame plates 66. There is a detent pawl 56 and a carryover trip lever 59 for each wheel 23 and these members are, of course, longitudinally movable with the computing wheels.

There is one carryover bar 41 and one carryover lever 46 for each of the register bars I9. As seen in Fig. 9, the levers 46 are provided with rounded upper end portions l5. As the register group is positioned in its diiferent lateral positions, one of the carryover trip levers 59 for each group of three wheels will become aligned with the rounded portion 'l5 of one of the trip levers. As a wheel 23 moves from 9 to 0 or from 0 to 9, the pin 53 will contact the portion 62 of carryover trip lever 59 to thereby rock said lever and cause the tail portion 6l thereof to rock the lever 45 counterclockwise, Fig. 1, about the shaft 57. Rocking of a carryover lever 45 causes a carryover bar 41 to be lifted from latching engagement with the transverse bar 38 to thereby cause a tens transfer to the next highest order wheel, as previously pointed out.

In order that an extra unit may be added to or subtracted from the lowest order wheel when the register passes through zero from a positive amount to a negative amount or from a negative amount to a positive amount, the carryover lever 45 for the highest denominational order is connected by a bail 1B to a carryover bar operating portion TI. When the highest order wheel passes through the transfer point, that is from 9 to 0 or 0 to 9, the carryover lever 45 for that order is rocked to thereby move bail 'I6 and carryover bar engaging portionv l1. The portion 'VI unlatches the carryover bar 4l corresponding to the lowest order wheel which through the arrangement described above causes the denominational operator bar I9 corresponding to the lowest order to move forward an extra digital amount to thereby turn the lowest order wheel an extra amount equivalent to one digit.

Automatic total printing After several columns of figures have been typed on a work sheet, some of the columns containing debit entries and other credit entries, it is desirable that the totals of the various columns be printed. In order that these totals may be automatically read out of the registers and printed, the present machine is equipped with total taking mechanism such as fully described in my prior Patent No. 2,398,395.

Y Briefly described, the total taking mechanism comprises a set of feelers 75, Figs. 1 and 2, which are normally held in their rearmost or retracted position by a universal restorer bar 79. When it is desired to take a total, a total key, not shown, is depressed, whereupon the carriage is tabulated to the next columnar position and the carriage operates a latch, as will be more fully described later, to release the bar 79 for forward movement under the influence of a spring 19', Fig. 6.

The feelers 18 are arrested at various stages of forward movement corresponding to the digits standing in the wheels of the aligned register It is to be understood that there is provided one feeler 18 for each denominational order and that as a register group is laterally shifted to its different positions, one or another of the sets of juxtaposed wheels will be aligned with the feelers. After the feelers have moved forward, plates 80, Fig. 1, are raised seriatim to raise an arm 8| pivoted at the rear of each feeler to thereby lift one of a series of blades 82 and close one of the switches 83. The closing of a switch 83, corresponding to a digit being sensed by the feeler 18, causes a solenoid 84 to be energized and through its armature 85 raise the draw-link corresponding to the sensed digit, into contact with the snatch roll I2. Engagement of the draw-link with the snatch roll will, of course, cause the corresponding digit to be printed. After all of the digits have been printed, the machine is cycled, during which time the total-reading feelers are returned to normal position as is well known.

Lateral register selection For shifting the register groups laterally to operatively align the wheels of one r another of the registers of the group with the differential operators and the total-reading feelers, each group is provided with a shipper member 85, as most clearly shown in Figs. 2 and 6. The shipper member 86 is provided with a pair of downwardly extending ears 81 at the front thereof fitting lightly against the outsides of side plates 52 of the register group frame. The ears 81 do not press against the plates 52 but are located in close proximity thereto. The ears 81 therefore do not interfere with the free downward or rearward movement of the plates 52 when the register group is moved to an additive or subtractive position.

Each of the shipper members 86 is slidably mounted upon a pair of brackets 88 having retaining screws 89 extending through elongated slots 90. The brackets 88 are fixed to a stationary cross member 9| of the machine. A resilient means in the form of a tension spring 92 is secured at one end to a lug 93 on said shipper member and xed at the other end to one of the brackets 88 so as to constantly urge the shipper member to the left, as seen in Fig. 2.

For retaining the shipper member 86 in its normal position, which is as shown in Fig. 2, that is to the right, a retaining means in the form of a rotatable member 94 is provided. The rotatable member 94 has steps on the periphery thereof and the shipper member 86 has a downwardly extending pin 95, Fig. 5, for engaging said peripheral steps. Rotation of the member 94 will bring the different steps on the periphery thereof into operative relation with said pin and the spring 92 will move the shipper member 86 toward the left, as viewed in Fig. 2, step by step in accordance with the rotative position of member 94. Due to the engagement of the ears 81 with the sides of plates 52, the register group is moved laterally by the shipper member 86 to align the wheels of different registers of the group with the differential actuators, as will readily be understood.

Each of the members 94 is rigidly secured to one end of a staff 96, to the other end of which is secured a pinion 91. The pinions 91 are in mesh with, and are operated by, racks 98 provided upon the forward ends of slides 99, |00 and |0|`, as best seen in Figs. 2 and 3.

The slides 99, |00 and |0| are supported and guided at their front ends by a cross member |02 mounted upon the machine frame and having slots therethrough for accommodating said slides. At their rear ends, the slides are supported and guided by brackets |03, only one of which is shown (see Figs. 2 and 4), secured to the framework of the machine and provided with a pair of headed screws |04 for engaging the sides and bottom portion of the slides.

Each slide is individually urged toward the front of the machine by a resilient member in the form of a spring |05. The slides are normally retained in their rearmost positions by a pair of latches, as will presently be described.

The slide 99 is provided with a pair of open latch slots |06 and |01 located near the rear end thereof. The slot |01 is considerably longer than the slot |06, as may be seen in Fig. 2. In the slot |06 is normally positioned a latch member |08, slidably guided at its lower end in bracket |03 which also supports and guides the slide 99, as previously pointed out. The latch member |08 has a pin-and-slot operating connection with a T-shaped lever |09 which is pivotally mounted on a stub shaft ||0 and urged in latch engaging clockwise direction by a spring One end of the lever |09 is engaged by a second lever ||2 at ||3. The second lever ||2 is pivotally mounted upon a shaft ||4 and connected by a link to a bell crank ||6 mounted upon a shaft ||1. Resting within an open slot in one arm of the bell crank I6 is a push rod I8 engaged at its upper end by a plate |9, which plate in turn supports a selector plate |20.

When a selector plate |20 is depressed by a dog |20', similar to the dog 21 and carried by the column unit 26, the latch member |08, through the chain of rods, links and levers described above, is withdrawn from the slot |06. Withdrawal of the latch member |08 from slot |06 allows the spring |05 to pull slide 99 forward until the back of slot |01 engages a latch member |2| similar to latch member |08. Forward movement of slide 99 causes its rack 98 to rotate pinion 91, which in turn rotates member 94 and thereby allows spring 92 to laterally move the register group to align a second set of computing wheels with the differential operators. The group of registers so moved may for convenience be referred to as the A group, and it may further be considered that whereas the No. l register of A group was previously operatively aligned with the differential actuators, the No. 2 register of A group is now aligned with the actuators.

For operating the latch I2|, I have provided a T-shaped member |22 urged in a latch engaging clockwise direction by a spring |23. The T- shaped member |22 is pivotally mounted upon the stub shaft |0 and one of its arms is engaged by a lever |24 pivotally mounted upon shaft ||4 and connected by a link to a bell crank |25 mounted upon shaft ||1. One arm of bell crank |25 is provided with an open slot for receiving a rod similar to rod ||8 and the rod is operated through a pair of plates similar to the plates ||9 and |20. Depression of plate |20 corresponding to bell crank |25 will cause a counterclockwise oscillation of lever |22 to withdraw latch member I 2| from elongated slot |01. Upon withdrawal of the latch member from slot |01, the slide 99 is again drawn forward by the spring to cause a further rotation of pinion 91 and retaining member 94 and thereby allow spring 92 to move the register group another lateral step toward the left. It will be apparent that the No.

'il 3 register of A group is now operatively aligned with the differential actuators and the totalreading feelers.`

Before an amount may be entered into any of the registers of the A group or a total printed from any of the registers of the group, the plate 29 previously referred to must be depressed. When plate 2d is depressed, a rod similar to rod |18 is moved downward to rock a bell crank i25 and through a member partially shown at |12? the couplers 3i? corresponding to the dierential actuators for the A group are raised.

The B. register group is selected for operation by depressing a plate 2e, which, through a rod similar to rod H3, rocks a bell crank 28 and, through the member partially shown in Fig. 4 at |29, lifts the couplers 36 corresponding to the B group.

4 The slide lli@ controls the lateral position of the B register group and this slide, similarly to slide 99, is provided with a pair of slots in its rear end portion, and since they are identical with the slots ist and Eel of slide 99, they have been given the same reference numerals.

Normally extending into the slot it is a latch member i3@ similar to latch member |08. Connected to the latch member |34) is a generally T-shaped lever lei, said lever being urged in a latch engaging counterclockwise direction by a spring |32. One arm of said lever is engaged by a second lever |33, which is pivotally mounted upon the shaft lili and connected by a link to a bell crank |35 pivotally mounted upon the shaft l Il. An open slot in one arm of bell crank 35 receives one end of a push rod |37 similar to push rod lit. Through a plate similar to plate H9, the push rod i3? is operatively connected to a selector plate similar to plate IZB). Upon depression of selector plate |21) corresponding to bell crank |35, the latch member E is withdrawn from the latch slot M in slide l0@ through the train of rods, links and levers described above. Withdrawal of latch member |393 causes the slide lill! to be drawn forward by its spring H35 until the rear edge of slot l in said slide comes into Contact with a second latch member |38. Forward movement of slide lili] causes its rack 98 to rotate pinion 91, which in turn rotates member @Il and thereby allows spring 92 to laterally move the register group to align a second set of computing wheels with the differential actuators. Instead of the No. l register of B group being operatively aligned with the diiferential actuators, the No. 2 register of said group is now aligned with said actuators.

Withdrawal of latch member |38 from slot i'i in slide ills will result in the B register group being shifted to a third position wherein the wheels of the No. 3 register will be aligned With the differential actuators, as will readily be understood. For lifting latch member |38 to Withdraw it from its slot i9?, a generally T-shaped lever i399, normally urged in a latch engaging counterclockwise direction by a spring ldd, is provided. One arm of the lever |39 supports a lever lill connected by a link to a bellv crank ieiZ pivotally mounted upon shaft l Il. An open slot in one arm or bell crank |42 supports a push rod similar to rod |37, which, through a plate similar to plate iid, is operatively connected at its top end to a plate IZEl. Depression of the plate E25, corresponding to bell crank |42, will result in withdrawal of latch member |38, as will readily be understood.

The C register group is selected for operal2 tion' by depressing a plate which, through a rod similar to rod H3, rocks a bell crank M3 and, through the member partially shown at Idil, lifts the couplers 35! corresponding to the C group.

The slide it!! vcontrols the lateral position of the C register group and this slide, similarly to slides de and let), provided with a pair of slots i536 and itl in its rear end portion.

Normally extending into the slot |35 is a latch member US5 similar to latch members i553 and 35. operatively connected to latch member by a pin-and-slot connection is a bell crank Idil pivotally mounted upon a stub shaft lill and urged in a latch engaging direction by a spring Hit. @ne arm of said bell crank is connected by a long link les to a generally T-shaped lever |5. One arm of said T-shaped lever isoperatively connected to a lever itil pivotally'mounted upon shaft lill and conneoted'at one end through'a link to a bell crank |52 pivotally mounted upon shaft |57?. An open slot in one arm of bell crank .lZ receives one end of a push rod similar to push rod i3?, which is operatively connected through a plate similar to plate H9 to a selector plate l. As will be readily understood, depression cf the plate i2@ corresponding to bell crank l5? Will, through the train of rods, links and levers above described, result in withdrawal of latch member' l from slot le@ in slide im. Withdrawal of said latch member will, of course, permit the spring HB5 to move the slide I0! forward until the rear edge of slot lill contacts a second latch member Sein. This forward movement of the slide lili will, of course, rotate the member ed and permit spring 92 to move the C register group laterally to a position wherein the No. 2 register of said group is operatively aligned with the differential actuators for said group.

Since the train of mechanism for operating latch member 53 is identical with that for operating latch member M5, no detailed description thereof is thought to be necessary. It will be readily apparent that when the latch member 53 is withdrawn from the slot it?, the C register group will be moved laterally to a position wherein the No. 3 register thereof will be operatively aligned with the differential actuaters and the total-reading feelers for that group.

lt is to be understood that my invention is not limited to the use of three registers per group or to three groups of registers. lf it is desirable to employ only two registers in a group, one of the latch members for the slides 99, |00 and/or lili may be removed, or if it is found desirable to employ more than three registers in a group, additional latch members may be provided.

Returning registers to normal position To return a laterally shifted register group to its normal position wherein the No. l register of the group is operatively aligned with the differential actuators and the total-reading feelers, the control slide 99, it@ or lei for said group is moved toward the rear of the machine. Rearward movement of a slide 9%, ilii or lill causes its rack 98 to rotate pinion Sil in the direction opposite to that in which it had been rotated lupon forward movement of the slide, This rotation of pinion @l will cause the member il to be rotated in a counterclookvvise direction as viewed in Fig. 5. rlhe steps on the periphery Q member @il flow smoothly into each other vso 13 that as said member is rotated in a counterclockwise direction to return to its normal, or Fig. 5, position, the shipper member 86 through the pin 95, and consequently the register group, is returned to its normal position.

For moving the slides 99, |99 and lill to the rear after they have been moved forward as aforesaid, a universal restorer bar |54 is employed. As will presently be described, the restorer bar |54, shownin Figs. l, 2 and 3 in its normal position, is moved toward the rear of the machine during the later part of a cycle. During the rearward movement of bar |54, it hits against a pin |55, with which each of the slides 99, |09 and ||l| is provided, on any of said slides which may have been moved forward, thereby picking up said slide and moving it toward the rear. When a slide reaches its home position, any of the latch members which have been lifted will be snapped down into latching position by the spring on the latch operating member, as previously described.

It will be remembered that at the time of instituting a cycle,the carriage has moved to a leftward position whereat none of the register shifting cam plates 28 are depressed and that, therefore, there will be nothing to prevent the latches from being operated by their respective springs.

Thus it will be seen that the rotatable member 94 constitutes a means for maintaining the register group in its normal position and also a means for returning the register group to its normal position after same has been laterally shifted.

For moving the restorer bar |54 toward the rear, said bar has secured thereto a pair of arms |56 which are pivotally connected at their forward ends to a pair of levers |51 secured upon a shaft |58. Only a part of shaft |58, and one of the levers |51, is shown but it is to be understood that said shaft extends entirely across the machine and that the two levers |51 are identical. Also secured to shaft |58 is a lever |59 having pivotally attached thereto a hook-link |69. The rear end of link |69 is provided with a slot |6| into which a pin |62 extends.

The pin |62 is carried by an arm |63 pivotally mounted upon a stationary stud |64. Also pivotally mounted upon stud |64 is an arm |66 provided with a landing |66, as seen in Fig. l0. The free ends of arms |63 and |65 are urged together by a relatively strong spring |61 but are held apart, as shown in Fig. 19, by a pin |68 on arm |63 resting upon the landing |66 of arm |65. A roller |69 is mounted upon the side plate 49 and when the machine is not being cycled, the roller |69 is positioned upon ledge |19 at the top of landing |66, at best seen in Fig. 10. A latch |1l is pivotally mounted upon a stationary stud |12 and is urged in a clockwise direction, as viewed in Fig. l, by a spring |13. When the roller |69 is in its normal position, it is in abutment with a shoulder |14 on latch |16'. A spring |15, lighter than spring |61, urges the arm |63 in a clockwise direction, as viewed in Fig. 1, to hold the ledge |19 against roller l 69.

When the machine is cycled, the side plate 49, which as previously pointed out is operatively connected to the general operator bar 39, is moved toward the front of the machine and then back to the Fig. 1 position. Forward movement of side plate 48 carries the roller |69 forward and upon the first slight forward movement, said roller moves away from shoulder |14 allowing spring |13 to move the latch |1| into engagement with a cooperating part |16 on arm |63. As the roller continues to move forward, spring |15 rocks arm |63 and, through the spring |61, arm |65, upwardly to keep landing |66 in engagement with said roller until hook-link |69 contacts the bottom of the general operator bar 39. After roller |69 leaves the landing |66, the general operator bar 39 and hook-link |60 are in sliding Contact and a slight additional forward movement of bar 39 will allow spring 15 to rock the arm |63 and, through pin |62, the hook-link |69, upwards to a point Where a shoulder |11 on said hook-link will be behind the general operator bar. This additional movement of arm |63 will allow the latch |1| to be moved by its spring |13 underneath the cooperating part |16.

As the general operator bar 39 nears the completion of the second half of its cycle, it contacts shoulder |11 on hook-link |66 and moves said link toward the rear. Rearward movement of link |69 causes the restorer bar |54 to be moved rearward as aforesaid through the levers |59 and |51 and arms |56. During the later part of the cycle, the roller |69 contacts the landing |66 and presses the arm |65 downward. Downward movement of arm tensions the heavy spring |61 but does not move the arm |63 downward because arm |63 is latched up by the latch l1l. At the very end of the cycle, the roller |69 contacts the shoulder |14 to rock the latch |1| in a counterclockwise direction, as viewed in Fig. 1 to thereby release arm |63 for downward movement under the influence of spring |61 which, as previously pointed out, is stronger than spring |15. This downward movement of the arm |63 results in releasing the shoulder |11 from the back of the general operator bar 39, and the restorer bar |54 is thereupon returned to its normal position by a spring |18.

Cycle prevention during register shifting In order to prevent jamming of the machine or damage to any of the parts thereof, it is important that cycling be prevented during the time that a register group is being laterally shifted. If the cycling clutch 43 should become engaged and thereby cause forward movement of the general operator bar 39 at a time when the Wheels of none of the registers of the selected group were properly aligned with the differential actuators, it is readily apparent that, at best, an inaccurate computation would be made.

In order that cycling will be prevented at all times when a register group is not in its fully selected position, the following mechanism is provided. A member |19, having a pair of notches |89 at one end thereof, is operatively connected to each of the register groups. The members |19 are slidably guided upon the stationary cross member 9| by means of a pair of pins or screws |6| nxed to the cross member 9| and extending through a pair of elongated slots |82 in the members |19. For each of the register groups, a motion multiplying lever |83 is pivotally mounted upon one of the shipper guiding screws 99 and has a pin-and-slot connection |84 with said shipper member and a pin-and-slot connection with one of the slides |19. Thus it will be apparent that when one of the shipper members 96, and consequently one of the register groups, is laterally shifted, the corresponding member |19 Will likewise be shifted but by a slightly greater extent due to the motion multiplying lever |83. In some instances, it may be desirable to omit the motion multiplying lever |93 and connect the members |19 directly to the shipper members 86.

A second member |85 extending transversely of the members |29 is slidably guided at its forward end by a screw or pin |37 iixed to the cross member 9| and extending through an elongated slot |99 in member |86. Member |36 is urged toward the front of the machine by a spring |39 and at its forward end is provided with an arm |99 carrying a feeler I9I for a purpose to be presently described.

At its rearmost end, the member |86 is provided with an extension |92 pivotally connected at |93 to a member |9fi. The member Vetis pivotally mounted upon a shaft |95 and con nected by a bail |96 to a finger |97.

Normally the spring |89, above referred to, due to the connections between the member |85 and the finger |97, holds the finger |97 lightly pressed against a stud |98 carried by a clutch closing plate |99. The plate |99 corresponds to the plate 93 of my prior Patent No. 2,178,702 and, as explained in said patent, the stud |93 must be released by the latch arm 35', Fig. 2, and be rotated in a clockwise direction, as viewed in Fig. 7, before the cycling clutch is engaged.

If all the register groups are in one of their fully selected positions, either the notches |39 in the members |19 will be aligned with the feeler ISI or the members |19 will be moved to the left far enough so that the ends thereof will be entireiy out of the path of movement of the feeler I9|. If on the other hand, a register group should not be in a fully selected position, then the side of the corresponding member |19 will be in the path of the feeler |9|. If during the time of this non-fully selected position of any register group, the clutch pawl 35 should be tripped, the clutch closing plate would attempt to rotate clockwise in order to engage the clutch but the stud |98 would be unable to move the finger I9? because, as above described, the finger I9? is operatively connected to the feeler I9! and the feeler |9| would abut the side of one of the members |19A and, therefore, be unable to move toward the rear far enough for the stud |89 to get past the engaging end of' finger |97. Thus it will be seen that I have provided means in part connected to the register groups for preventing cycling at all times when the wheels of none of the registers of any of the groups are operatively aligned with the differential actuators.

Register shifting prevention during cycling If all the register groups are in any one of their fully selected positions, then as pointed out above, either the notches |89 will be aligned with the feeler |9| or one or more of the members |19 will be located far enough to the left so that its end is out of the path of movement of the feeler |9I. If under these conditions, the latch arm 35 is removed from the stud |98, the plate |99 will rotate in a clockwise direction, as viewed in Fig. 7, and the stud |99 will cam the finger |9'I toward the rear. Rearward movement of the finger |91 will result in rearward movement of member |86 against the action of its relatively light spring |89 and place the feeler |9| within one or the other of the notches |80 or move it to a position rearwardly of the front edge of one of the members |19 thus locki6 ing all of the register groups in their selected positions.

In order that the registers will remain locked during the forward and rearward movement or the differential actuators, the vcycle shaft 42 is provided with a holding cam 209, and the extension |92 is provided with a roller 29|. When the finger lilis moved to the rear, as aforesaid, the extension |92 is, of course, likewise moved rearwardly and the roller 20| is moved far enough to the rear so that as the shaft 42 rotates, the holding cam 299 will be moved underneath the roller 23| to hold extension |92 and consequently the member |86 in their rearmost positions. This will, of course, maintain the feeler IIII in its rearmost position and maintain the register groups in a locked condition. When the cycle of the shaft i2 is approximately three quarters completed, the general operator bar 39 has completed its movement of the differential actuatorsjand at that point a second cam 202 on the shaft i2 picks up a roller 293 on the extension |92 and returns the finger |97 into the path of the stud |93 and also returns the member |89 and the feeler |9| to their forward or unlocking positions. Thus it will be seen that I have provided means for locking the register groups in their selected positions during a cycle.

Prevention of automatic total taking during register shifting As previously explained, with the present machine it is possible to automatically print the total standing in any of the registers. For taking a total, a reed, not shown, has an operative connection with a shaft 204, Fig. 6, and when the reed is depressed by column unit 2E, the shaft 294| is turned in a clockwise direction, as viewed in Fig. 6. As explained in my prior Patent No. 2,372,681, previously referred to, clockwise rotation of shaft 294 serves to withdraw a latch arm 295 fixed thereto from latching engagement with a slide 296. Also, as explained in said patent, the slide 296 is pivotally connected to an arm 2|]I xed to one end of a cross shaft 298. The cross shaft 298 has fixed to its other end an arm 299 to which is pivotally connected a member 2|0. The slide 206 and the member 2|9 have fixed therebetween the previously mentioned feeler restorer bar I9 and when latch arm 295 is withdrawn, the spring i9 draws the feeler restorer bar I9 toward the front of the machine thereby freeing the total-reading feelers for forward movement.

In order that the feeler restorer bar may not move forward and consequently the feelers may not move forward into engagement with the register wheels except when all the register groups are in a fully selected position, the following mechanism is provided. To the arm 299 is pivotally attached a member 2|| having a latch notch 2 |2 therein. Normally extending into said latch notch is a 1atch member 2|3 pivotally connected at 2|l| to an arm 2| 5 fixed to a cross shaft 2|6. Also xed to said cross shaft is an arm 2II having a stud 2|8 normally engaged by, and held up in its-Fig. 6 position by, a latch arm 2|9 fixed to the aforementioned shaft 2M. Likewise fixed to the cross shaft 2|6 is an arm 22|) urged downwardly by a spring 22| and carrying a stud 222 on the free end thereof. For cooperating with the stud 222, a dog 223 loosely mounted upon a cross shaft 224 is provided. The dog 223 is provided with a shoulder having a rounded portion 225 and a land 226 and has an upward extension 221 extending through a slot 228 in the member I83. The dog 223 is normally held in a position such that the rounded portion 225 is under the stud 222 on arm 22e by an arrangement to be presently explained.

If it is desired to automatically print the total standing in any one of the registers and all of the register groups are in a fully selected position, a total reed is depressed to thereby rock the shaft 234 clockwise of the Fig. 6 position, as explained in my prior Patent No. 2,372,681 referred to above. Such clockwise rocking of shaft 234 removes the latch arm 223 from engagement with the slide 236 to condition the restorer bar '19 for forward movement under the influence of spring 'i9'. Clockwise rocking of shaft 294 also removes the latch arm 2 l 3 from engagement with the stud 2 IS on arm 2H. Thereupon the spring 22l pulls the arm 22e downwardly and rocks cross shaft 2HE in a clocx'gvise direction, as viewed in Fig. G, to thereby withdraw the latch member 2I3 from engagement with the latch notch 2l2. The spring 7e is then free to pull the restorer 19 toward the front of the machine. The dog 223 does not interfere with the downward movement of arm 220 because, as previously pointed out, the stud 222 is normally resting upon the rounded portion 225 and is only held up by the arm 2H being engaged by latch arm 219.

As the arm 22e moves downward, the stud 222 thereon cams the dog 223 in a clockwise direction, as viewed in Figs. 6 and 7. As the dog 223 moves clockwise, the upward extension 227 on said dog, which is normally located in the rear of slot 223 in arm it, as seen in Fig. 2, moves toward the rear of the machine. Rearward movement of extension 22'! causes rearward movement of member l8 and causes all the register groups to become locked in their selected positions due to the cooperation of feeler i9! and the notches |33, vas previously explained.

If any register group is not in a fully selected position at the time it is desired to take an automatic total, the notches IBG will not be in a position to permit rearward movement of member IBG, and if the member |88 cannot move rearward, it is obvious that the extension 22'! of dog 223 cannot move rearward and, therefore, the arm 222 cannot be moved downward to withdraw the latch member 2i3 from the latch notch 2|2. Therefore even though the latch arml 235 is rocked for total taking, the restorer bar 'i9 and consequently the total-reading feelers 18 cannot move forward because the latch member 2I3 will prevent the arm 203 from being moved counterclockwise of its Fig. 6 position by spring 19.

For restoring the parts to their normal posi-- tions after a total has been taken, the machine is cycled. During the very rst part of the cycle, the shaft 228 is rocked to return the feeler restorer bar 'i3 and the slide to the Fig. 6 position, as fully explained in my aforementioned Patent No. 2,372,681. A spring 22d acting through an arm 23e] fixed upon shaft 204 moves the latch arm 235 down into engaging position. This rocking of the shaft 202 likewise returns the latch slot 2|2 to a position wherein it may be engaged by the latch member 253, as will readily be understood.

For moving the latch member 2l3 back into engagement with the latch slot 2l2, a lint: 23S is pivotally connected at one end to an inter mediate portion of arm 223 and at the other end to an end of a lever 232. The lever 232 is is provided at its free end with a portion 234 constructed and arranged to be engaged by a pin 233 carried by an arm rThe arm 236 is connected to the general operator bar 39 and serves to move said bar from its normal Fig. 6 position toward the front of the machine and back to the Fig. position during the cycle, as previously explained. As the cycle gets under way, the pin 235 rocks lever 232 and through the lint; 236 the arm 22; is raised. Laising of arm rocis the shaft EES and moves the latch member 2&3 down into engagement with the latch notch 2i2. Rocking of shaft 2|S also causes the arm 2i? carried thereby to be raised to a position wherein it will be held up by the latch arm 21e, as readily be understood.

Thus it will be seen that means has been provided te prevent the total-reading feelers from moving forward at all times when any register group is not in a fully selected position and conversely means has been provided for locking the register groups in their selected positions during the time that the total-reading feelers are forward.

No automatic total during cycle During a cycle, if the dilerential actuators have been indexed, the wheels of any selected register will be rotated, as previously mentioned. It is therefore important that the total-reading eelers be not allowed to move forward into engagement with the computing wheels during the time that the machine is being cycled.

As previously explained, if the arm 220 cannot move down, the total-reading feelers cannot go forward. For preventing downward movement of arm 22S while the machine is being cycled, the following mechanism is provided.

A lever 232 is pivotally mounted upon the shaft and has a cammed end portion 233 resting upon the stud 38 of plate E9e. The other end of lever 23'! has a slot 239 engaging a pin 243 on an arm 24d of a Y-shaped member 242 pivotally mounted upon a shaft 243. Also mounted upon shaft 243 and connected to the Y-shaped member 242 by a bail 244 is an arm 245 carrying a pin 246 for a purpose to be presently explained. A tension spring 247 extends between the bail 244 and a pin 24d carried by a lever 24S which is also pivctally mounted at an intermediate point on the shaft 243. lThe lever 243 carries a second pin 253 at its opposite end and the pin 235i is engaged within a slot 251i in the dog 223, as most clearly seen in Fig. 7.

When the clutch 43 is tripped for cycling, the plate ISH moves in a clockwise direction, as viewed in Fig. '7, before the clutch actually becomes engaged. Upon the initial movement of plate ISB, the lever 23? is rocked in a counterclockwise direction, as viewed in Fig. '7, by the wiping engagement of the stud i523 with the cammed end 238 of said lever. Such counterclockwise rocking of lever 23? will cause the bail 244 to be rocked clockwise, as viewed in Fig'. 7, about the shaft 243 as an axis, thereby ten sioning the spring 222. es the spring 2d? pulls down on the pin 248, the lever 249 is rocked about the shaft 243 and the pin due to its location within the slot rotates the deg 223 in a counterclockwise direction, as viewed in Fig. "l, by an amount just great enough to move the land 22E underneath the stud 222 on arm 220.

When the land 223 is underneath the stud 222, removal of latch arm 215 Yfrom engagement with the arm 2l? will not permit the spring 224 to pull the arm 225 downward because the stud 222 on said arm will have no camming effect upon the dog 223. rhus it will be seen that after the cycle clutch is tripped, the total-reading feelers cannot be made to move forward into engagement with the wheels of any of the registers.

For insuring that the land 225 will be held beneath the stud 222 during the entire cycle, the cycle shaft 42 is provided with a disc 252 having a recess 253 in the periphery thereof. Before a cycle is started, a roller 255, mounted upon an arm 255, is positioned within the recess 253. The arm 255 is pivotally mounted upon the framework of the machine at 255 and is urged in a direction to hold the roller 255 against the periphery of disc 252 by a spring 25?.

Pivotally connected at one end to the arm 255 is a link 25S having a slot 25S in its other end. The aforementioned pin 25e is positioned within the slot 259.

As the shaft 52 begins to rotate due to engagement of the cycle clutch 53, the stud 49S on plate les moves away from the caminsd end portion of lever 227i so that the land 225 on clog 223 is no longer held thereby underneath the stud 222. At this point, however, the disc 252 has moved to a position wherein the roller 252 has been cammed out and now rides upon the periphery of said disc. The outward camming of` roller 254 has resulted in the arm 255 being rocked clockwise, as viewed in Fig. '7, to pull down on the pin 255 on arm 245 through the link 258. When the end of arm 245, carrying the pin 245, is pulled down, the bail 255 will be rocked clockwise, as viewed in Fig. '7, to thereby hold the spring 24"! under tension and hold the dog 223 in its forward position, as will readily be appreciated.

The recess 253 does not return to position of alignment with the roller 254 until the cycle is nearly completed, but to insure that the land 226 cannot get out from under the stud 222 until the cycle is fully completed, a slide 255, best seen in Fig. 6, is provided. The slide 255 is urged toward the rear by a spring 25H and normally abuts the end 252 of the arm 255. One end of the slide 255 is hooked over the restorer bar E54 at' 253. it will be remembered that the bar H55 is moved toward the rear during the latter part of a cycle and is returned to its normal position only after the cycle has been fully completed. When the bar i5@ is moved to the rear, the spring 258 will move the slide 25] toward the rear by an amount permitted by screw-and-slot connections 26d. Rearward movement of the slide 25d will cause it to move underneath the end 252 of arm 255 and hold said arm in its operated position even after the recess 253 has returned to alignment with the roller 254. After the cycle is completed, the restorer bar 455 moves forward and by engagement with the hook 263 moves the slide 25) forward thereby freeing the arm 255 and permitting the spring 255 to pull the roller 254 into the recess 253. The dog 223 is then free to be moved to its rearward position wherein the rounded portion 225 is beneath the stud 222.

For normally positioning the rounded portion beneath the stud 222 of arm 220, the Y-shaped member 242 is provided with a second arm 265 which is operatively connected with a key locking member 255 by a pair of pins 261 fitted against the opposite sides of said arm. The key locking member 266 is urged toward the front of the machine by a spring 252 and its forward movement is limited by the back of a slot 259 in said member engaging a pin 22).

When the machine is in its normal state, the key locking member 255, through the arm/255, rocks the bail 224 counterclockwise of shaft 243, as viewed in Fig. 7. The bail 244 engages a shoulder on lever 245 at 2H, as best seen in 1fig. 8, thereby causing the pin 255 onsaid lever to rock the dog 223 about its supporting shaft 224 by an amount suiiicient to move the rounded portion 225 of said dog to a position beneath the stud 222 of arm 225, whereby the parts are conditioned for automatic total taking, as previously explained.

Thus it will be apparent that l' have extensively increased the iiexibility of the machine shown and described in my copending application Serial No. 494,434; that I have now provided a multiple register machine wherein it is possible to compute in any one of nine registers and in numerous combinations of two or more of said registers; that'it is possible to automatically print the total standing in any of the registers and that I have incorporated certain safety features which make it impossible for an inexperienced operator to jam or damage the machine.

Numerous changes may, of course, be resorted to without departing from the spirit of the invention which is limited only by the extent of the following claims.

I claim:

1. In a computing machine, a register group comprising a plurality of juxtaposed wheels for each denominational order, a set of differential actuators comprising an actuator for each denominational order and so arranged that the ac- 1 tuators are normally in operative alignment with one of the wheels of the register group for each denominational order, resilient means urging said register group toward a lateral position for operatively aligning another of the juxtaposed wheels of each denominational order with said set of actuators, retaining means for holding said register group in its normal position, and

means for operating said retaining means in such manner that said resilient means may move said register group as aforesaid, said last mentioned means being so constructed and arranged as to also be capable of operating said retaining means in such manner as to restore said register group to its normal position against the action of said resilient means.

2. In a computing machine having a traveling carriage, a register group comprising a plurality of juxtaposed wheels for each denominational order, a set of differential actuators comprising an actuator for each denominational order and so arranged that the actuators are normlly in operative alignment with one of the wheels of the register group for each denominational order, resilient means urging said register group toward a lateral position for operatively aligning another of the juxtaposed wheels of each denominational order with said set of actuators, retaining means for holding said register group in its normal position, and means under control of said carriage for operating said retaining means in such manner that said resilient means may move the register group as aforesaid, said last mentioned means beingso constructed and arranged as to also be capable of operating said retaining means in such manner as to restore said register 2l group to its normal position against the action of said resilient means.

3. In a computing machine having a group of registers comprising a plurality of juxtaposed Wheels for each denominational order and wherein said group of registers is shiftable laterally to dirle-rent operative positions, resilient means urging said group of registers in one lateral direction, a rotatable member having steps on the periphery thereof, said steps being located at different radial distances from the center thereof, and cooperating with said group of registers to prevent said resilient means from moving the group or" registers in said one lateral direction, and means for operating said rotatable member to bring the different steps on the periphery thereof into operative relation to said group of registers so that said resilient means may move said group oi' registers laterally step by step in accordance with the rotative position of said rotatable member.

e. in a computing machine having a traveling carriage and group of registers comprising a plurality or juxtaposed wheels for each denominational order and wherein said group of registers is shiftable laterally to different operative positions, resilient means urging said group of registers in one lateral direction, a rotatable member having steps on the periphery thereof, said steps being located at different radial distances from the center thereof, and cooperating with said group or registers to prevent said resilient means from moving the group of registers in said one lateral direction, and means controlled by said carriage for operating said rotatable member to bring the different steps on the periphery thereof into operative relation to said group of registers so that said resilient means may move said group of registers laterally step by step in accordance with the rotative position oi said rotatable member.

5. In a compuating machine, a register group comprising a frame supporting a plurality of registers, a set of diilerential actuators so arranged that the actuators are normally in operative alignment with the wheels i one of the registers, a cycling general operator for moving said actuators to run amounts into the wheels oi the aligned register, resilient means urging said register group toward a lateral position for operatively aligning the wheels of another of the registers with said set of actuators, retaining means for holding said register group in its normal position, means for operating said retaining means in such manner that said resilient means may move said register group as aforesaid, and means in part operatively connected to said frame which supports the registers for preventing cycling or" said general operator at all times when the wheels of one or another of the registers are not operatively aligned with the set of differential actuators.

6. In a computing machine, a register group comprising a frame supporting a plurality of registers, a set of differential actuators so arranged that the actuators are normally in operative alignment with the wheels ci one of the registers, a cycling general operator for moving said actuators to run amounts into the wheels of the aligned register, a one-revolution clutch for operatively connecting said general operator to a source of power, means for effecting a lateral shiit of said register group to bring the Wheels oi another one of said registers and the set of differential actuators into operative alignment,

and means comprising a iirst member connected .to move laterally with said register frame and a second member constructed and arranged to cooperate With said one-revolution clutch, said iirst and second members having parts which are coengageable only when the wheels of any one of the registers are in operative alignment with the actuators whereby when the register group is in a position such that the wheels of none of the registers are operatively aligned with the actuators, the second member' will act to prevent engagement of the one-revolution clutch and thereby prevent cycling or" the general operator.

7. In va computing machine, a register group comprising a frame supporting a plurality of registers, a set or differential actuators so arranged that the actuators are normally in operative alignment with the wheels of one of the registers, a cycling general operator for moving said actuators to run amounts into the wheels of the aligned register, a one-revolution clutch for operatively connecting said general operator to a source of power, means for eiecting a lateral shift of said register group to bring the Wheels of another one of said registers and the set of differential actuators into operative alignment, and means comprising a nrst member connected to move laterally with said register frame and a second member constructed and arranged to cooperate with said one-revolution clutch and to be movedtransversely of said first member whenever said clutch is engaged, said rst and second members having parts which are coengageable when the wheels of any one of the registers are in operative alignment with the actuators and which parts are coengaged during a cycle of the machine to thereby prevent lateral movement of said iirst member and consequently lock the register group in its selected position during the cycle.

3. In a machine of the character described having a cycling general operator, the combination with numeral types, and a letter-feedable carriage cooperative therewith, of a register group comprising a plurality of sets of computing wheels, a set of total-reading eelers normally retracted from but tending to move to engage the `wheels of one of said sets of wheels, means for effecting a relative shift between said register group and said set of eelers to operatively align one or another of said sets of wheels with said set of feelers, a universal restorer for said set of feelers tending to move away from said feelers and normally latched in position to oppose engagement of said feelers with any of said sets of wheels, a latch operable to condition said restorer for release, and additional means associated with said restorer for preventing release of said restorer (even though said latch is operated) at any time when none or" the sets of wheels and said set of eelers are operatively aligned.

9. In a machine of the character described having a cycling general operator, the combination with numeral types, and a letter-feedable carriage cooperative therewith, of a register group comprising a plurality of sets oi computing wheels, a set of total-reading feelers normally retracted from but tending to move to engage the Wheels of one of said sets of wheels, means for laterally shifting said register group to operatively align one or another of said sets of wheels with said set of ieelers, a, universal restorer for said set of feelers tending to move away from said feelers and normally latohed in position to oppose engagement of said feelers with any of said sets of Wheels, a latch operable to condition said restorer for release, a rst member arranged to move laterali with said register group and a second member constructed and arranged to cooperate with said restorer, said first and second members having complementary parts which are coengageable only when the wheels of any one of said sets of Wheels are in operative alignment with said feelers, whereby when the Wheels of none of the sets of Wheels are operatively aligned with the ieelers, the second member will act to prevent release or" said restorer even though said latch is operated.

l0. In a credit balance computing machine, a plurality of register groups, each group comprising a plurality of registers and each register comprising a plurality of Wheels, a set of differential actuators for each register group, means for shifting any one of said register groups independently of the other register groups to bring the Wheels of one of the registers of the shifted group into operative alignment With the set of dierential actuators for said group, a cycling general operator for running indexed amounts into the Wheels of the selected register, rneans for conditioning the selected group so that the selected register thereof will receive the indexed amounts either positively or negatively, and vmeans for correcting the lowest order Wheel of the selected register for a difference of one unit when the Wheels of said register pass from a positive to a negative total or vice versa.

l1. In a credit balance computing machine, a plurality of register groups, each group comprising a plurality of Wheels for each denominational order, a set of differential actuators for each register group, a carryover trip lever for each Wheel, a set of carryover devices for each register group, means for shifting any one of said register groups independently of the other register groups to bring one of the wheels for each denominational order of the shifted group into operative alignment with the set of diierential actuators for said group and to also bring the carryover trip levers associated With the selected Wheels into operative alignment withthe set of carryover devices, a cycling general operator for run-l ning indeXed amounts into the selected Wheels of the selected register group, and means for in-- troducing a fugitive one to the selected Wheels of the selected group in any shifted position .of the group.

, HENRY L. PITMAN.

REFERENCES orrnp y The following references are of r`record in the le of this patent:

UNITED STATES PATENTS Pitman Feb. 17, 1948

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