US2686469A

US2686469A - Toggenburger

Info

Publication number: US2686469A
Authority: US
Publication date: 1954-08-17
Anticipated expiration: 1971-08-17

Description

Aug. 17, 1954 J. TOGGENBURGER COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE l4 Sheets-Sheet 1 Filed Dec. 21, 1948 IN V EN TOR. Jain @yenu y r &42 ATTDRNEY 1954 J. TOGGENBURGER 2,686,469 I COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 1948 14 Sheets-Sheet 2 mmvrox.

J. TOGGENBURGER Aug. 17, 1954 COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE l4 Sheets-Sheet 3 Filed Dec. 21, 1948 31: INVENTOR. 90/122 7599?]76'217967 ATTORNEY 1954 J. TOGGENBURGER 2,686,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 1948 14 Sheets-Sheet 4 L F OD m SPACE BAR smrr Rf INVEN TOR.

2 BY gwafwzz A TTORNEY Aug. 17, 1954 J TQGGENBURGER 2,686,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed D80. 21, 1948 14 Sheets-Sheet 5 INVEN TOR e/m E e/zbzn ("7 N BY 5211 07134717 ATTORNEY 1 1954 J. TOGGENBURGER 2,686,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE 14 Sheets-Sheet 6 Filed Dec. 21, 1948 4% IMMINIIIII l IIIIIIIIIIIIIIIIIII INVENTOR.

BY jail: @mu'yn 22m (22%;

ATTORNEY Aug. 17, 1954 J. TOGGENBURGER 2,686,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 1948 14 Sheets-Sheet 7 /NVEN T0R jut/z B f/Inga BY wczfwv TTORNE Y Aug. 17, 1954 I J. TOGGENBURGER 2,686,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 1948 14 Sheets-Sheet 8 O jar/222 @elzu aer ynn fi $57 p ATmRNEY Aug. 17, 1954 J. TOGGENBURGER 2,685,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 1948 14 Sheets-Sheet 9 l Ill/l II Ill 1 $55 fl INVENTOR. BY enbm aer ATTORNEY OMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 1948 14 Sheets-

Sheet

1,0

INVENTOR.

BY Zrzamuyef Aug. 17, 1954 J. TOGGENBURGER COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed D80. 21, 1948 14 Sheets-Sheet 11 fi TfRA/E Y COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE l4 Sheets-Sheet 12 Filed Dec. 21, 1948 INVENTOR. ammyer W 71%;;

ATTORNEY 7, 1954 J. TOGGENBURGER 2,685,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 1948 14 Sheets-Sheet l3 INVEN TOR.

BY jafin 7511927511346? Af' aii Patented Aug. 17, 1954 COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE John Toggenburger, Hartford, Conn., assignor to Underwood Corporation, New York, N. Y., a

corporation of Delaware Application December 21, 1948, Serial No. 66,441

37 Claims. 1

This invention relates to typewriting and computing machines in general, and with regard to certain aspects thereof, more particularly to combined structures of such machines, embodying typewriting facilities as well as printing facilities for recording computed amounts.

Such structures are well known in the art, but usually some desirable features inherent in conventional typewriting, and/or computing machines, are compromised to obtain an operative structure. In some prior combined machines the recording or printing facilities of the adding or computing mechanism is located relatively to a typewriting point, so as to require wasteful, timeconsuming and awkward movements of a papersupporting carriage to obtain recordings from the typewriting and the calculating mechanism in adjoining relation on a recording medium. In many other known machines the view to the printing line is obstructed or the machine lacks in other respects.

It is a main object of the invention to provide typewriting facilities in efiicient association with printing facilities for a computing mechanism.

It is also an object of the invention to provide a machine of the above composite species, which embodies the important and desirable features usually contained in modern computing or adding machines, and which includes in advantageous association therewith efliciently functioning typewriting facilities.

Particularly it is also an object to provide an efiicient machine of the noted composite species which requires no complicated movements of a paper-supporting carriage to effect typewriting and calculating recording in close adjacency, and which gives a clear view of all the recorded matter.

It is a very important object also to provide in such a combined machine a typewriting mechanism which includes a type guide that is always in position to serve its intended purpose.

Another object of the invention is to provide a machine which includes a complement of computing machine printing members that are closely adjacent to one side of a typewriting point which is common to a set of typewriting elements, preferably saidprinting members being adapted to move to appropriate printing positions from retired positions exposing the printing line.

It is also an object to provide typewriting facilities and computing machine printing facilities in a combined structure so organized that either of the two facilities are readily operatable without conflict with each other. I

An additional object is to provide for imprints by the computing machine mechanism by efficient imprint effecting means.

It is a further .object to effect computing machine imprints quietly, in an efficient manner, preferably by pressing seriatim the selected types to printing position.

An important object of the invention is to provide for imprints off differentially adjusted, adjacent printing members by a rolling means rolling across such members and thereby seriatim effecting imprint therefrom.

Also an object of the invention is to operate differentially printing members with considerable clearance from the front of a platen, then to move collectively such printing members nearly or lightly into contact with the platen, and thereafter to press the types seriatim against the platen for quiet and efficient printing,

It is a further object of the invention to provide in association with printing bars 18, efficient means, non-conflicting with the typewriting mechanism, whereby to obtain imprints of 0s off significant order printing members only.

It is an object also to provide reliably operative, efiicient, key-responsive power indexing devices for setting up numerical values for the computing mechanism.

Moreover, it is an object to provide efficiently operative power means, for typewriting, as well as for setting up numerical values in the computing mechanism.

It is a further object to provide settable means to render the same numeral keys controlling for either power typewriting or for the setting up of values in the computing mechanism.

An object is also to provide eificient means to condition the machine alternatively for type- Writing and computing in different columns.

One of the objects is to provide an efficient cycle-operatable tabulating mechanism which at the termination of each tabulating run of the carriage functions to place the carriage under letter-feed control of the typewriting mechanism.

In conjunction with the foregoing objects, it i also an object to provide for return of the carriage beyond the initial columnar position, and for efficient automatically operative means to tabulate the carriage thereafter to the initial column.

A further object is to provide efficient carriage controlled means whereby machine cycles will produce tabulating movements only if the car riage is stationed in a particular column or columns.

The noted objects are embracive of only some of the new features of the invention, and addi tional objects will readily be perceived from the detailed description hereinafter following.

In building the machine herein featured, there has been used to a large degree the mechanism embodied in the standard Sundstrand Class C Accounting Machine, as generally exemplified in the patent to Sunstrand, No, 2,194,270, dated March 19, 1940. In regard to the typewriting mechanism, use has been made of much of the. mechanism contained in the Underwood All- Electric Typewriter recently placed on the market.

Turning now to the drawings:

Figures 1 and 1A, matched together along the vertical dot and dash line in each of these figures, constitute a sectional, left-hand side elevation of applicants composite typewriting and printing computing machine,

Figure 2 is a fragmentary front elevation showing a typewriter segment with an upward- 1y projecting type guide, and a set of-computing machine printing bars located adiacently to the type guide,

Figure 3. is. a plan view, showing; the keyboard of applicants composite machine, and showing additionally a mechanism for pressing adding machine type bars seriatim against a, platen and thereby effecting imprints,

Figure 4; is. a fragmentary front. view showin some of the keys seen Figure 3 and partial..-- larly a set of digit keys and some control. keys, together with operative control trains. leading therefrom,

Figure 5. is a fragmentaryuleft-hand side elevation, depicting the imprint. effecting mecha.- nism shown in Figure 3, and additionally a mach. anism whereby imprints be restricted iiQ printing bars of significant orders. The view additionally shows a. mechanism whereby the imprint effecting mechanism is controlled to operate only if at least. one printing bar rises to a significant position, v

Figure. 6. is a fragmentary front elevation showing some of the mechanism also. seen in Figure 5-,

Figure '7 is a perspective View from the rightfront side of the machine looking down upon cycle instituting and related mechanism,

Figure 8; is a plan view of the imprint efiecting device seen in Figure 3, in a position. of readiness for action upon the; adding machine. printing bars,

Figure 9: is similar to. Figure 8, but, shows. the imprint efiecting device. in an intermediary stage of action,

Figure 10 is similar to Figures8 and 9;, but the imprint efiecting device has done its. Work and is about to return to normal position,

Figure 11 is a sectional front view ofportions of a mechanism for renderingthe digit keys potentially operative either with respect to the typing or with respect to an amount set-up or indexing mechanism,

Figure 121s aleft-hand side. elevation showing the, mechanism of Figure 11, and includingv a manually settable controlling device set for the digit keys to serve in amount indexing capacity,

Fi ure 13. is a left-handsectional viewdepicting a mechanism to move. the printing. bars collectively nearer to the platen preparatory to the imprint effecting means, coming intov action,

Figure 14: shows the manual control device of 4 Figure 12 set so that the digit keys are in control of the typewriting instrumentalities,

Figure 15 is a fragmentary right-hand side elevation depicting certain function control keys and showing also a blank-cycle enforcing mechamsm,

Figure 16. is a. sectional front elevation taken substantially along lines l6- l B- of Figure 1A, and showing a carriage tabulating mechanism in a normal condition in which the carriage is under control of a, letter-feed escapement.

Figure 17 is a view similar to Figure 16, but the carriage tabulating mechanism has been operated and; the carriage is in the process of executing a tab ulating movement,

Figure 18 is a frontal, fragmentary sectional view a. special selector as having been carriage actuated, to render the digit keys controlling with respect to the adding machine indexing mechanism,

Figure 19. is a diagrammatic right-hand sectional representation of the framework support! ing the typewriting and the adding machine. instrumentalities,

Figure 20: a front sectional view similar to Figure 17, but with the tabulating mechanism ready to. assume normal condition at. the end of the tabulating run,

Figure 21 is a representation. of a work-sheet together with a. diagrammatic representation. of a set of control dogs tl'lerefor,v

Figure 22. (on sheet with Figure l); is a plan view of av conventional machine cycling; drive, and

Figure 23 is a fractionalside elevation of a mechanism to. incapacitate the function selectors of the. machine.

The description of the invention hereinafter following is divided under the following head:-- ings:

l. Work-sheet supporting carriage 2. Typewriting mechanism and addingmachine printing bars 3. Letter-feed mechanism for work-sheetsupporting carriage Computing mechanism and printing means controlled thereby 5. Crossfooter and operating means therefor- 6'. Rear registers 7. Machine cycling means 8, Cycle key 9.. Cycle and other function controls by' carriage and keys 10.. Carriage tabulating and returning mechanism 11, Automatic control means to condition digit keys for typewriting or amount indexing 12. Manual control to, condition digit keys for typewriting or amount indexing 13; Incapacitation of function control selectors for

typewriting

1,4. Imprint effecting means for computing machine printing bars 15;. Means to provide for imprints of significant order o y 16.. Zero, total signified. by printing of two Zeros 17. Means to prevent idle operation of imprint eifecting means 18. More on functionv control. keys 19; Blank cycle enforcing means. 20.. Other control keys; '21. Main assembly units. 22*. Work example. 23. Conclusion 1. Work-sheet supporting r ge 2. Typewriting mechanism and adding machine I printing bars The carriage with its platen H is common to a set or array of typewriter type bars l1 and a group of adding machine printing bars l8 and |8a, the bars l8 being digit printing bars and a bar |8a having signal types. The typewriter type bars H are pivotally mounted upon a segment 20 for actuation from diversive normal positions, to. print at a common typewriting point I9 that is situated above a type guide 2|. The adding machine printing bars I8 and [8a. are normally retired below the said typewriting point and are as a group preferably directly adjacent to the left of the type guide, see Figures 2 and 3. The type bar segment 20 is generally of conventional design, but occupies a position sufficient- 1y forward of the platen to afford operating space for the printing bars I8 which are directly in back of the segment and normally somewhat in front of the platen, the segment 20 having preferably a clearance cut as at 22 for accommodating it as closely as possible to the platen. Since the segment has a more forward position than is customary in conventional typewriters, typing heads 23 on the type bars are correspondingly carried thereon in more projecting relations of approach towards the platen. All type bars have at their heads a lip 24 for guiding entrance in the type guide 2| as each type bar approaches its printing position. The type guide 2| is very close to the front of the platen I and is secured to the rear of the type bar segment 20, as at 25. The guiding lips 24 in cooperation with the type guide 2| assure that'the typing impressions are made at the exact location of the typewriting Point 19. The adding machine printing members |8 are confined as a group between the left side of the type guide 2| and a. guide element 21 reaching upwardly from the segment 23, see Figures 2 and 3.

Said printing members or bars |8 are thus at one side of the typewriting point and within the lateral limits of the array of diversive type bars l1.

The various type bars [1 are guided in slots 3| of the segment 20 which converge directly below the type guide 2|. The various type heads 23 and their guiding lips 24 approach the platen in upright relation, as is conventional in typewriters. A type bar in typing position is indicated in dot and dash lines, in Figure 2.

The operating mechanism for-thetypewriter type bars |1 will now be described, and it is to be observed that in the main this mechanism is like that disclosed in the patent to Yaeger, No. 2,254,7 4, dated September 2, 1941.

In the swinging plane of each type bar 11 lies a bell crank 32 which by a push link 33 has an operative connection with the type bar. All said bell cranks 32, and all said links 33, are identical. The bell cranks 32 are pivotally supported in an arcuate bar 34 which for the purpose has radial guide slots and which carries an arcuate pivot wire 35 common to all the bell cranks. Forwardly of the bell cranks 32 there are pivoted on a straight fulcrum wire 36, a set of upright levers 31, individually swingable forwardly and each connected by a link 38 to an upreaching arm of one of the bell cranks 32. The upright levers 31 are of graded lengths, exactly as in the said patent' to Yaeger, No. 2,254,764, and have each a rolling face 40. A pendant lever 4| lies directly to the rear of each rolling face 40 for rolling contact therewith. The arms 4| are pivotally carried on a bar 42, in a straight row and have each pivotally connected thereto, in a rearwardly reaching relation, a type action driving link or actuator 43. The rear of each actuator 43 is urged upwardly and rearwardly by a spring 44, against the bottom of an angle bar 45, so that a snatch pawl 46 thereon is normally clear of a constantly rotating toothed power shaft 41, the latter being common to all the snatch pawls. The actuators 43 and the snatch pawls lie in a row extending parallel to the power shaft 41.

The said snatch pawls 46 are selectively connectable, transitorily with the power shaft 41 by imparting to the actuators 43 downward displacement about their pivotal connections with the arms 4|. The selective connections are effected under control of a set of alphabet and digit keys respectively numbered 50 and 5|. Said keys are on levers 49 which are pivoted to the rear of the power shaft 41 in a slotted bar 52, and which have each, pivotally carried thereon, as at 54, in upreaching relation a link 53 having a hook-end normally posed over a lateral protuberance 55 of the actuator 43. The links 53 have capacity for some rearward displacement about said pivots 54 against the tension of light springs 56, the normal position of each link with respect to its associated key lever 49 being established by contact therebetween, as at 51. Near their front ends the key levers 49 are vertically guided in slots of a comb plate 60. Springs at the rear urge the levers 49 upwardly to their normal positions seen in Figure 1.

It will thus be seen that by selective operation of the keys 49 a desired actuator 43 will be drawn down for association of its snatch pawl 46 with the power shaft 41, and that consequently such actuator will become power operated forwardly and will through rolling action of the arm 4| on the lever 31 operate the appropriate type action.

Normally the segment 20 and the arcuate bar 34 are located in a lower case position, as shown in Figure 1, so that the lower case type (the type nearer the type bar pivot) will swing to the printing point l9. A case shift mechanism, not shown, is provided to give, when desired, the segment 20 and the bell crank suporting bar 34 a lower position wherein the upper case types will swing to the typewriting point IS. The segment 2|] and the arcuate bar 34 constitute a unitary movable case shift structure and to this end the arcuate bar at each side of the type bar system has a rearward reach as at 63, see Figure l, and affords a flange 64 at each side of the segment to secure the latter thereto, as by screws 65, see Figures 1, 2 and 3. Said case shiftable structure is guided for case shift movement substantially in the planein which the group of adding machine printingmembers '18 he Asseen in .thedrawings, said printing bars .or members [8 withreference to said segment arerearwardly tilted'from the bottomtthereof and contiguous thereto at the top. The direction of caseshift is indicatedin Figure-l, by the. showing of a ball and raceway atBS. Such direction ofshiftagreeswiththe tilt' to which the printing bars [8 lie when they are operated against the platen, and,.moreover, the types of any'operated type bar 11 will lie substantially parallel with. the direction of said shift, It is to b'eunderstood that the points of connection of theilinks 38 with: the rolling levers?! and the bell cranks 32. are located to provide for similar type bar actuation While typingin either type case.

.The'snatch pawlsw are disconnectedirom the power roll at desiredpoints in each operating stroke. This is .accomplishedunder control of abutments .on a bar G1,- which are encountered. by cam'faces provided on the underside of the ac-- tuators #3 just infront oi the snatch .pawls.

The describedtyping mechanism differs from the onedisclosed in thepatent to Yaeger, No, 2,25 l,764 only by the interepositioni ng of the bell cranks 32 and the links 33 between thelinks .38 and'the type bars H. This change was made in order to have the operating connections for the typebars H forward of the type bar pivots and thereby to allow thepositioning of the segment 20. as closely as possible to the adding machine printing .bars t8 and the platen.

The'typewriting mechanism just described is supported by a typewriterframe generally designated by the numeral W-andcomprising twospacedsside walls H which. are rigidly connected by the aforedescribed bars 42 and 2, as wellas other bars.

3. Letter feed mechanism for work-sheet supporting carriage Referring to Figure l, the carriage H) has supported thereon a letter feed rack l2; Supported on the typewriter frame: it, ina manner not shown, is an escapment wheel 13 carrying. a pinion M normally mesh with said rack 12. The rack. 72 has teeth at letter-feed intervals and is releasable from the pinion .14 at will for repositioning thexcar riage. Accordingly, therach is carried at opposite ends of the carriage, by arms 15 having finger pieces Hi extending upward-Ly therefrom. to swing the rack abovethe pinion M, Springs Tl associatedwith the arms 75 maintain therack l2 releasably in. mesh. with the pinion 14-. The carriage is constantly urged in letter-teed. direction, that is, leftwardly, un-

der the tension of. a conventionalcarriage feed spring generally indicated at 1-8, see Figure lA. However, a letter-teed: escap'ment 841 associated with the escapement wheel 13 exercises normally control over the carriage to hold it in Whatever letter-feed position it may bepositionedt This escapement may be the same asis commonly used in the standard Underwood typewriter and is rockable by operation of each type action: to feed the carriageone letter feed stepa Namely,, each of the bell cranks 32 is adapted to operatean arcuate universal. bar 8t, giving. the: latter a short movement of translation forwardly. The universal: bar 81 ineludestwo rearwardly ream.- hig bars- 82' which at their rear are supportedand articulated v upon spaced, upreachin'gi arms 83 of rocker frame having an axis at as. A: down reaching arm 84 of the-rocker frame is operatively communicative with the. eseapeiiient by means of a link 86. The rocker frame axis casesliifts unitarily with the segment 20. The universal bar 'BI and its associated parts are spring restored. The curved universal bar '8"! is nestedclosely to the front of the arcuate bar '34 and has one or more guiding pins 81 extending thereinto. From the above it will be seen that each power operation of a type bar I! will be accompanied by a transitory operation of the universal bar 8! and that the carriage consequently will execute a letter-feeding step following each typing impression made by one ofthe type bars ll.

4. Computing mechanism and printing means controlled thereby The adding machine printing bars l8 are lightweight in structure and each has along. its rear side a row. of digit types 94, the uppermost type on eachtype bar being a 0' type and those be low being progressively of higher digits. The printing bar's 8 abut each other normally at least down to the point of the lowest type is, and as a group are contained individually slid ablelengthwise between the type guide 2| and. the member 21', as before stated. Eachpriiiting bar l8 may be caused to rise differentially under control of an adding machine mechanism which in its major respects is identical with thecom venti'onally marketed Sundstrand Class C Accounting Machine, disclosed. in the above men'- tioned Patent No. 2,194,270. Specifically; the machine comprises for each of the adding machine printing bars l8 a differential actuator '95, all of which are guided for vertical movement in a-usual manner, at the top by a bar 96}. and at a lower level by a bar 91, these bars bein notched to space the actuators laterally. The

bars

96 and 97 extend between and are carried fast on two usual spaced. frame members 92' ofithe adding machine framework, see Figures 1, 2, .9 andiothers. The printing bars id are of reduced thickness belowthe types ill to intersperse them with the differential actuators eachprinting bar having its associated. actuator closely to the right thereof. Motion is transmitted from each differential actuator 95 toi ts associated. printingbar by motion multiplying means,v preferably comprising a relatively large gear 9'8 in: mesh witha gear-rack- H15- on the lower end of. the printing bar It, and a smaller gear or pinion to! in mesh with a rack Hi2 formed on the difierential actuator 9-5, the-two gears being united for rotatiori together. The: severalpairs oi gears 98 and. lfll are turnably supported in a row ona fixed supporting rod. as as shownin-Fig-ure 2} The differential actuators are structurally very similar to those shown in Sundstrand Patent No 2,l 94",2 7'0 but are ending just abovethe supporting bar 96, whereabove in said patent they carry digit types that are individually hammer actuatable thereon. Dueto the provision of the gears .98 and till. the movement of. the printing bars is are enlarged with respect to the movements of" the differential actuators 95, for which reason'the types 91' can'be spaced widely enough along the bars to ive" always clear, individual t ping im I pressions when moveurearwardiy, into printing engagement with the platen; OIi-theQther hand; the type selecting d'ifi erential movements or the bars 95 are relatively small, making it feasible to build an" adding machine mechanism of remtivel small proportions. The various actuators 95 have each anindividual -l'iftmg lever Wrasse pins I08, ready in elated therewith by a pin and slot connection, as shown, each lifting lever I04 being under constant tension of a lifting sprin I 05. In the normal condition of the machine, however, a universal bar I06 overlies these levers I 04 so that the actuators 95 and the printing bars I8 are positioned lowermost as seen in Figure 1. During each machine cycle the universal bar I06 rises an the springs I05 associated with the levers I04 will cause the actuators 95 and their associated printing bars to rise differentially, as called for by a particular item entry or by a total printing operation, the mechanism employed for this being in many regards the same as in said Patent No. 2,194,270.

An amount indexing mechanism, generally designated by the numeral I 01, see Figure 1, controls the differential rise of the actuators 95 for item" entries. This indexing mechanism includes a conventional bed of stops, comprising a plurality of adjacent vertical rows of stop pins I08, each vertical row containing 10 pins, representative, beginning from the bottom upwardly, the digit values from to 9, and there being as many adjacent rows of pins as actuators 95.

At the rear of the bed of pins I08 there are arranged in a transversely movable carriage I II a series of adjacent tail pins I I2 which are slidable in vertical perforations therein. Normally said carriage is located so that therightmost pin II2 is a short space to the left of the bed of pins I 08. Each tail pin II2 has extending through a perforation at the bottom thereof a forward extension II 3 of one of the actuators 95, the various extensions H3 having hinged association as at I I4 with their related actuators. The tail pin carriage III constitutes a denomination shifting carriage and is slidably supported on a transverse rod H5 in the machine.

Progressively beginning with the leftmost row, index pins I 08 are set in accordance with the digit value to be represented. For this purpose there is articulated with the denominational carriage I I I, as at I H, the rear end of an arm I I8 that is fulcrumecl on a vertical pin I20 to swing horizontally. The arm II8 carries an upright post I I 9 near the rear end thereof, wherethrough .there extends a vertical row of push rods I2I for setting the index pins I 08. These rods are adapted to swing with the arm H8 progressively into operative alignment with the several rows of index pins 503. Before commencin to index an amount in bed of pins I08, the push rods I2I are directly in front of the leftmost row of index pins !08. In a manner to be explained later, the push rods I2I are selectively operated to index one index pin first in the leftmost row. Thereupon the denominational carriage I| I moves rightwardly one step to place the rightmost vertical tail pin I 12 in alignment with the first row of pins I08. Another selective operation of the push rods I01 may then be effected, and being that the push rods I2! are then in alignment with the second row of pins I08, a pin will consequently b set in this row. There follows another denominational shift of the carriage III, as before, and the indexing operations may be repeated as required by the amount to be indexed. After the desired value has been indexed, the appropriate sensing pins II2 will have become positioned underneath the appropriate rows of set index a cycle to limit to the upward movement of the actuators 95 and associated 10 printing bars in accordance with the value represented by the set pins.

Referring to Figure 1, the push rods I2I have pivotal connections, as at I25, with arms I23. The latter are all alike and are carried for individual horizontal swinging movement on a vertical stud I24 to actuate the rods I2I rearwardly. All said pivotal connections I 25 lie substantially in a vertical line directly in line with the fulcrum pin I20 of the swinging arm I I8. It follows, therefore, that the push rods I2I swing with the arm I I8 and are operable by the arms I23 to index a pin I08 of whatever vertical row may be opposite it. The arms 023 are spring restored in a manner well known, to positions wherein the rear ends of the push rods I2I are clear of the bed of index pins I08, as shown inFigure 1.

A novel mechanism is provided to power actuate the push rod actuating arms I23 under control of the same digit keys 5I by which the numeral typewriting actions are called into operation. Referring to Figures 1, 11 and 12, the levers 49 which have the digit keys 5|, carry each pivotally attached thereto a pendant element I21. Whenever the keys 5| are operated for typewriting numerals, said pendant elements I21 vibrate idly down and up with their associated key levers 49.

From Figure 1 it will be seen that in front of said pendant elements I2! there lie forwardly reaching levers I28 which at their front ends each carry pivotally a snatch pawl I30. The latter are normally below and clear of a toothed power roll I3I which, while the machine is in use, is constantly power rotated in the direction of the arrow. The said levers I28, see Figures 1 and 4, are supported upon pivot pins I29 provided on short arms I32 that are mounted and upreaching for forward swinging movement upon the lugs I33 on a stationary rod I34 in the machine. Whenever the keys 5| are to be operative for amount indexing operation, the draw links 53 for connecting the type action actuators 43 must be rendered inoperative and, conversely the pendant elements I21 must be brought into cooperative alignment with the rear ends of the levers I28.

To this end a unitarily pivoted structure is provided, which includes spaced side members I35 pivotally carried on studs I39 provided on the opposite side walls II of the typewriter, and which includes further an upper bar I36 and a lower bar I31 rigidly connecting said side members I35. When the digit keys 5I are to be operative for typewriting, the structure I35, I36, I 31 is in the pivotal position seen in Figure 1. By means to be described later, the said pivoted structure is swung to the position seen in Figure 12 whenever it is required that the keys 5| be operative for amount indexing function in connection with the adding machine mechanism.

Observing from Figure 1, it will be seen that the pull links 53, by reason of the forward position of the rod tion with regard to the typewriter actuators 43, and that the pendant elements I27, by reason of the position of the rod I31, are normally lying to the rear of the actuator levers I 28, the springs I38 urging the pendant elements I27 to lean resiliently rearwardly against the rod I31.

In the position of the pivotal structure I 35, I36, I31 shown in Figure 12, the rod I36 has displaced the pull links 53 rearwardly for incapacitation thereof about the pivot 54, while the rod I31 has swung all the pendant elements I2! into operative relation over the rear ends of the levers I36, are normally in operative rela-- I28. Therefore when the digit keys 'areselectively operated while the structure I35, I35, I31 is set as seen in Figure 12, the pendant elements I21 will rock the levers I28 selectively to engage the appropriate snatch pawls I39 with the toothed shaft I3I, the rocked lever I23 consequently receiving bodily a power motion rearwardly, and the arms I32 being rearwardly swinging during such motion.

Operatingtrainslead from the pivot pin I22 on eacharrn I32 to the appropriate push rod operatingarms I23 of the indexing. mechanism.

These trains, see Figure 4, include identical links I42 articulated to the pins I29 and extending downwardly therefrom. With the exception of thetwo most'centrally located links I42 in the machine, all these links are connected to bails I43 that are rockable on a stationary rod I44 and embody upreaching arms I45 individually associated with the -various push rod operating arms The bails I43 are variously shaped, as shown, reaching from their points of connection with the links I42 inwardly from opposite sides to provide'the upreaching arms I45 in a cluster in front of the arms I23. I43 includea forwardly reaching arm I43 to which one of the links I42 is connected. From the two middle links I42, the motion to their associated push rod'operating arms I23 is transmitted by two simple bell cranks, each including, as the said bails, an upreachingarm I45 and a forwardly reaching arm I46. All the arms I45 have an operating nose I41 directly in front of the appropriate arm I23, said noses being arranged relative to the various arms I23 at various arm lengths, preferably in an echelon arrangement asshown in Figure 4, in order that equal angular motion received by the'various arms I45 willresult in equal angular motions of the push rod operating arms I23. Some of the bails have intermediate web portions I56. This is to providethat the lateral order of the upreaching arms I45 isthe same as the lateral order of the related links I42, and thereby to make possible said echelon arrangement of the noses I41.

The bail supporting rod I44 iscarried on lugs I5I that project rigidly from a stationary cross bar I52 in the machine. Two of these lugs flank the cluster or array, of upreaching arms I45 and, in conjunction with spacing washers between the various upreaching arms I45, determine the lateral positions of the latter, and, therefore, the

bails I 43.

The actuator levers I 28 rest normally near their forward ends upon a stationary angularly shaped cross bar I56. This is under the urge of springs I51 which are anchored to the bar I56 and draw the levers I28 downwardly and forwardly. The normal positions of the actuator levers I28 may beindirectly determined through engagement of the bail and bell crank structures embodying the arms I45, with the lower front side of the bar I52.

As each of the actuator levers I23 is driven rearwardly by the power shaft I3 I, and as consequently, the index pins in the various tiers become set, each actuated actuator lever I 22, by coaction of a cam face I60 thereon with an abutment screw IBI, cams such actuator downwardly to separate its snatch pawl I33 from the power shaft I3I. The abutment screws IBI are adjustably carried on a transverse bar I62 fastened upon the adding machine framework;

Each actuator lever I23 is preferably operated All the bails 1 only once for each actuation of. its associated digit key 5|. To this end, see Figures 1 and 4,

the rearward endsof the actuator levers I28 may have each a laterally projecting lug I63 for engagement by the related pendant member I21, each engaged lug IE3 riding off the rear of the pendant members I21 as each lever I28 is being actuated. Subsequently during the return of the actuated lever I23, the pendant member I21, if remaining operated, is idly displaced about its pivotal connection on the key lever 43 by said lug I63, wherefore the pendant member I21 can reassume its potentially effective position over said lug I63 only after a restoration of the digit key. The snatch pawl I30 has capacity for some limited pivotal motion on the actuator I28 to the end of assuring a full engagement with the power shaft I3I.

A structure, which in the standard Sundstrand machine hereinabove noted houses a group of 10 digit keys, is retained in the present composite machine, although these keys are replaced by the keys 5I. This is for the support of some old aswell as new mechanism. Referring to Figures 1 and 4, this housingstructure comprises a base plate I64 fastened as at I65, Figure 1, to the base frame I61 of the adding machine. It further comprises two spaced side walls I68, I63. The bars I34, I62, I56 are preferably carried by these side walls I68, I69. The bottom panel I64 has clearance perforationsfor some of the links I42 and some of the upreaching arms I45.

Upon each successive indexing operation effected under control of a key 5i, the denominational carriage III, see Figure 1, executes a denomination shifting step to the right as seen from the front of the machine. Referring to Figures 1 and 4, this is done under control of the push rod actuating arms I23 in a usual manner, through operation of a universal bar I'II that is pivoted coaxially with the arms I23 and which has connection by means of av link I12 with. a usual escapement device I13, the denominational shifting carriage III being urged to feed rightwardly under power of a spring, not shown.

A usual device, not shown, is provided at the left of the index pin bed to restrict the rise of all actuators of insignificant order to rise Only to 0 position. This device, as is conventional in said zSundstrand machine, is incapacitated during total printing operations, when it is desired that all actuators 95 be allowed to rise in accordance with the amounts to be total printed.

5. Crossfootcr and operating means therefor The differential actuators 95 have each a rearward extension 2m to each of which there is connected an adding rack 2H and a subtracting rack 2I2. A register 2I3, henceforth to be referred to as a crossfooter, inasmuch as it is capable of addition and subtraction, is arranged between the racks 2I I and 2 I2, and is adapted to be shifted horizontally into mesh with either the adding or subtracting racks, in the same mannor as in said patent to Sundstrand No. 2,194,270.

The crossfooter 2I3 comprises a series of individual pinions 2I4 rotatively mounted upon a transverse shaft 2 I5 that is shiftable rearwardly or forwardly to mesh the pinions 2 I4 respectively with the adding racks 2II or the subtracting racks 2I2. The racks 2H and 252 are attached to the rearward actuator branches 2 III by means of mounting studs 2I6 on said branches which reach through short vertical slots 211 in said