US1270242A - Combined type-writing and computing machine. - Google Patents

Description

a c. STICKNEY.

COMBINED TYPE WRITING AND SOMPUTING MACHIN 1270242 APPLICATION FILED MAY 24. I912. :i atented JHRG 7 SHEETS-*SHEEI' I.

STECKNEY.

MEMBENEU "{K PE WRi'UNG AND COMPUTING MACHINE.

malted June 18, 1918.

Z SHEET B. C. SIICKNEY.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

' APPLICATION FILED MAY 24. 1912. (3,242, I PatentedJune 18, 1918.

7SHEETS-SIIEEI 3.

\ M-M..M, I

B. C. STQCKNEYa comsmeo TYPE wmme AND cemunwe mama APPLlC-ATION FILED MAY 24, IEHZ- 1 T i 1 5,379,242, imemefimne 18, 1918.

TSHEETS-SHEET 4 M .M I

v B. c. SHCKNEY. COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED MAY 24. I912.

Patented. June 18, 1918.

7SHEETSSHEET 5.

r H -V/l//////// I I A Q N B. C. 'STSCKNEY.

comma) TYPE wRmm; AND COMPUTBNG MACHINE.

APPLICATION FILED MAY 24, I912.

Patented June 18, 1918.

7 SHEETSSHEET 6.

EN i NE SN 1! l, E l. VIII-LEI m Lil B. C. SHCKNEY.

COMBINED TYPE WRlTING AND COMPUTING MACHINE.

APPLZCATEON FILED MAY 24. 1912.

Patentedlune 18, 1918.

7 SHEETS-SHEET 7- E 3 U j a r GQMHENED TYPE V .iTIZ lG AND CGIZPUTI'NG MACHINE.

STATES PATENT oFFIoE.

L U31 NEE? 75., A CGBPGBATION (335 NEW Application fileii 2 2, 131 3.

how lliii'lllllfS mural oharacier ooul' he aininlilihil more. illv parts, engei'iallv ilio cnmpuimg oi- (lial who: rouin P nu l: hai" so as lo no i'onaiod lhoivl in run up he nun'ilmrs indol'iicd by lho selling 11;) of iln wins on the rack hays \vlun'vln' lisi'inct columns can he ail loll vol-finally and have ihoii' iinlivnlual sums i'ocxn'iloil on the separate computing head fin aoirumulatin oi trons-adding i'UlIlliUl w lwail in also pzoi'ii'leal in which is run up the {JYUHS (UIXlplilktllOll of ulna numnew (romp! fig" ii-ho several columns.

in carrying oul this in'u'n'ovoinonl; a coinpuling (-ari'iago may he provided to carry Z'ho svi'iois o7 computing h mils n'liioli may loo movuil by tho *fypmvi'iloi: oa'ii-riago or as shown. 'n v its own spring unilei Jim control of lhv l vnon'i'iiei' carriage. 'ilng. con'i nnfing livails thin; ammo i-auczres i so iiarzlwg in i'ogi'islvi' will: 'l'lnin v The pin Eilik bars an: only Enough? into oinjagmnenl Willi the individual vertical! (oinputing was when a number is being run up by an actuation of the general op- Specificaiion of Letters Fai ontofl June 18, 1918,

Sadr 11310. 639,3"

'11: rack liars howovoir, are brought ll llg'felileii'i', wniha movement oi:

iilie pai' aicular primary 0 mputinghead which happens to he in activo relation with lho pin bars so as to have its computing Wheels rotated the same amounl' as flu: corresponding wheels of the priinaz v Qonipul'ing head.

Other features and advantages will hereinafter appear.

In tho accompanying Figaro 1 a per broken away to Show lure.

drawings, poiuvs view partly the underlying struclion taken 1 rom 2 is a vertical i to rear,

l 3 is a fraginenl'anv front View in elevation. partly broken avvay to sliovv the. underlying Sl'lllijtlllm and showing all of the parts in lheiz' normal inactive positions. I

Fig. l is a iliaginu'inmtic top plan View.

Fig. is a flig'lllinl'liiy view partly in plan am parilv in horizontal section. $hoW- ingg i'lio comical ion of the numeral keys To ''ho lovers; :ni-luaiod l'lioi elnx Fig. {E ii; a (loiail vertical section taken from right lei. showing one of the donoininational pin-hearing rack bars (lopi nocl a posiiion to have one of the pins {hora-on wi l by the aaoociated linkage.

is a view similar to Fig". (3. shovu Maria in the Sumo position as in Fig. will the oxi-oplion that one of the linkages ha boon raised to the corresponding pin on l'lMf-(ilQPl'PSSiWl column bai.

Fig. 8 a fraginoniaiy real olovation, showingthe trans-posing linkages, whereby tho (leiamninational column har are offset from their Follows by means of ivappets carried by the carriage.

{l is a fraginezitai v lop plan View, wing a pfll'l ifin oi the means for conli'olling; the movement of ho (-omputing carriage from ihv lvpowiiioi carriage.

Fig. 10 is a :liam'aunnatic view, showing the relation the accumulating computing head wheels to one of the primary computing ilGiHi WlNOlS. and also showing the arz'angeinem of the l'ons-oan'ying mechanism for both.

did

rims! Fig. 11 is a vertical detail section showing the general operator as having moved for enough on its forward stroke to bring the toe of the shifting bell crank out or the notch in the cam, so to raise the )in hearing rack bars into mesh with the associated pinions carried by the dial wheils, and also showing the toe of the other shifting lever raised out pt the notch onto the major portion of the cam so as to swing the pinions of the accumulating or cross-adding computing head into mesh with the gears of the primary computing head so as to be driven thereby.

Fig. 12 is a vertical section on the line aa of Fig. 15.

Fig. 13 is a view of the parts shown in Fig. 11, showing the general operator and the parts moved thereby in the act of start- Ml ing on their return stroke after they have moved completely forward, so that the toes on both the shifting lovers have slipped into the cam notches to cause the pin-bearing rack bars and the pinions of the cross-adding or accumulating computing head to move out of mesh with the associated gears carried by the dial wheels of the primary computing head which happens to he in action.

Fig. ll a View of the parts shown in Figs. 11 and 13, showing the parts in their relative relation at a point substantially midway between the ends of the return stroke of the general operator.

Fig. 15 is a vertical section taken at right angles to the views shown in. Figs. 11, 13 and 14, and showing the clutch connection of the'parts whereby the cam disks can rotate during the forward movement of the general operator and the associated mechanism and yet remain stationary during the return movement, and also showing the clutch connection whereby the tens'carrying assisting;

mechanism remains inactive durin the for- Ward stroke of the general operator and comes in play during the return. stroke of the general operator.

Fig. 16 is a vertical section on the line 2-42 of Fig. 15.

Fig. 17 is a fragmentary view showing more clearly the relative arrangement of the lever for shifting the cross-adding or accumulating computing head, with respect to its actuating can].

Fig. 18 is a fragmentary View in elevation showing a portion of the mechanism for controlling the movement of the computing carriage from the typewriter carriage.

Fig-.19 is a fragmentary front view in elevation, showing the series of primary computing heads at the right.

Alphabet keys 1 and numeral keys 2 depress levers 3, to rock hell cranks l, which swing type-bars 5 to print upon a platen (:3. The platen is mounted upon a. carriage '2', which, as usual in the Underwood typei'ritrev-ones ing machine, is driven by a spring barrel 8. The step-by-step or letter-feeding movement of the carriage is controlled by dogs 9, which are operated by a universal bar 10, actuated by heels 11 on the type-bars.

The numeral key-levers 3 have pendent links 12, pivoted at their lower ends to lovers 13 of the first order, fulcruined at ll upon fixed brackets 15. "ll icse levers extend toward be right of the keyboard, Fig. 5, and at their outer ends are pivoted to the bottom ends of upstanding links 16, to thrust the latter up as the keys descend. The links 16 may have returning springs 16, and may be in a row parallel with the key-levers at 5, and the levers 13 may be of assorted lengths; and the links 12 may be disposed in a'diagonal row so as to give clearance; whi e the lulcrums Ll may be so placed that the thrust links 16 are given equal movements. It is obviously not essential to place the levers l3 diagonally; and it is also apparent that the numeral key levers 3 may be otherwise connected to the links 16.

These links 16 are connected at their up per ends with a set or nest of linkages intended to set up the computation pins. Each linkage comprises a horizontal pinsetting bar 17, to which the upper end of its link 16 is pivoted at. 18, Fi t G. This horizontal link 17 is pivoted at its ends upon a pair of bell cranks 19, 20, which are connected by a link 21, so that said link 17 is given a parallel movement up and down. When one of these links 17 is thrust up, it sets one of its computation pins 22 in the manner indicated at 7.

The computation pins are arranged in eight rows of nine pins each, one row being mounted. upon each bar 23. The nine bars carry at th ir forward ends racks 24, for communicating movement to nine dial wheels 2", arranged at the front of the machine about on a level with the typewriter carriage, Where they may be easily read.

It will be seen that these coi'nputation racks or bars 23 are compactly mounted at one side of the trains of the typewriting machine, preferably at the right-hand side, and that the links 16, as well as the piirsenting linkages, are all compactly placed under the rack bars 23, and connected by simple devices to the keys; whereby great economy of room" edected, and the necessity of unduly elevating the keyboard of themachine is avoided.

When the computation racks are in normal positions, they are out of reach of the pin-setting linkages l7; and provision is made whereby the typewriting carriaae 7 depresses the computing racks or bars 8atitlfim,l

so that the linkages may set t is pins thereon.

From a rod 26, fixedor mounted on the carriage, extend rearwardiy a pair of arms 27., carrying a rack along wh are in I dependently adjustable several dogs 29, in

.ing nested one form a denomination-transposmg device, so

position to engage, one after another, a series of rockj-arms which are loosely mounted upon a'fixed one 31, and each connected by a bail a forwardly-extendmg arm 33, the latter having at its forward end a pin 34, engaging a. horizontal slot in a con'iputation bar 23: the slot permitting the pin toraise or lower the rear end of the bar, without interfermg with the longitudi- .nal movementthereof which occurs at the operation of turning the computing wheels. The dog29 may vibrate any arm 30. and bail 32, together with'thatarm 33 which is pref erably integral with the bail 32 and .arm 30, so that-the; pin-carrying bar is swung down to enable any of the linkages 1' to thrust up the overlying pin, see Figs. 6 and 7.

It w ll be seen at Fig. 8,'which is a rear the denominational order of the reverse of the denominathe arms '33, all the bails-bewithin another as shown, to

elevation, that the arms is tionalv order of that while the operationof the arms 30 proceeds toward the right at Fig. 8, the operation of the arms 33 proceeds toward the-left, at

.it is the arm 30 of highest denomination v to -t1on pin' is lifted upon said rack which is first rocked by the carriage-dog'29.

From the foregoing, it will be seen that at the completion of a letter-feeding movement of the typewriter carriage, one of the pincarrying racks is depressed, and tl atxat the ensuing stroke of a numeral key a hoi iputaor bar, so that said p'in will project above its fellows when the bar is rated position.

In this manner, the pins are set up one after another, as the number is written upon the work sheet which isca'rried upon the platen. the writing of the number, the'operative pulls forwardly a handle 36 on an arm 37 which extends from a rock shaft 38. The

' latter also carries an upstanding arm ,,39,

which forms part of the general operator of the computing mechanism, and the principal funct on of which'ls to rotate the dad wheels 25 as determined by the computation pins which have been set up by the keys 2.

At the initial part of the of the general operator 39, the computation racks 24 are shifted up into mesh with pinions 4O fixedime to each of the dial wheel 25. It will be seen that the racks'24 prefer bly stand normally well below the dial wheels 25, to permit the latter to travel with the computing carriage upon which they are mounted, as will presently be explained.

.-,This shifting of the racks 24 up into mesh with the pinions, is elfected work of'thc machine.

the proper order be,

returned to its normal ele- Atfthe completion offork 57 formed bar or rack 41 aforesaid being forwa rd stroke through the instruinentalityof a horizontalv driver -11, pivoted at its rear end at -12 to the upper end ofarm39, and extending forwardly and carrying on its forward end a rack 43, which meshes with an idle pinion 44, the latter meshing with a pinion-lion a shaft 73, which carries a rack-controlling disk 4T, provided with a cam 48, This cam forms one side of a notch cut in said disk. This notch is normally occupied by a finger or toe 49, carried upon an arm 50, which extends up from arock shaft 51 mounted in Forwardly from said rock shaftol extend two arms 52, united by a shifter bar 53, which passes through horizontal slots 54 in all the racks-.24. whereby said bar 23 may shift the racks up into mesh with thee-omputation pinions 40, and down to normal position.

Sufiicient rotation of the disk His etl'ccted to cam the finger i9 out of the notch 48, and thereby lift the racks :24, before the latter advance longitudinally. the parts at this moment are seen at Fig. 11.

The raCkS 24 are now in mesh with the computation pinions 40. in which they are held or locked by gagementoflinger 49 with unmutilatcd peri[.)l1ery,of thedisk 4.7. A horizontal cross-bar .35, forming part. of the general operator, now advances to engage position reason of the en- :all of the computation pins :22 which have men set up by the keys :2, and to advance the computation racks accordingly during the remainder of the forward stroke of the general operator iii-111.39; whereby the ingly, to add upon the dial wheels the numher which has. just been written upon the work sheet.

The i'ack-advancing pair of arms 56. seen in are. lixed upon bar is carried by a plan at Fig. l..wliioli a rock shaft 42. carried in a uponthe upper end of the general operator arm 39, Fig. l: the driving loose on said rock shaft, and supported at ils l'orward end on a guide roll 58 which is placed directly beneath pinion 44, Fig. 2. The rack-ads vancing bar may rest direct,ly upon the racks. and maybe swivelcd at. saw its driving arms 56, to accommodate itself to the slight inclination of the rack bars as they rise. into mesh with their pinions. A spring (it) may be. provided upon the l'tX'k-Sllilft 42. to hold the bat-55 lightly down upon the racks' The dial wheels 25 having thus been ro-' tated. and the general operator having completed or substantially completed its forward. stroke. theracks 24 a re dropped out of mesh This unmeshing the framethe cylindrical or pimons 40 and dial wheels are rotated accord The positions of notch in the cam disk 47; the other wall of said notch being designated as 61, and being abrupt, so that the racks may drop promptlyon the completion of the rotation of the notched disk 47 through a single revolution. It will be understood that the handle 36 is pulled down by the operative until it is arrested by an adjustable stop 62, after the racks 24: have dropped; and that thereupon the operative lifts said handle and returns the general operator to normal position, ready for another computation. During such retiirn stroke, the racks 24 ride backwardly upon the guides 34, 53, without turning any wheels. A spring 62 may either efi'ect or assist the return of the general operator.

During the return stroke of the general operator, the cam disk 47 remains'stationary, being held against rotation by the finger 49 which occupies the notch and serves as a detent; a spring 63 (Fig. 3), coiled around the rock shaft 51, aiding the weight of the racks in maintaining said finger 49 against displacement,

The pinion 45, however, is also employed for driving the tens-carrying trains; and for this purpose it makes a single revolution in reverse direction during the return stroke of the general operator." To permit this return stroke while cam disk 47 is stationary, a Q

plete revolution in the same direction, for

the purpose already explained.

The rack-advancing bar 55, during the return motion of the general operator 39, engages lugs 69 formed on the computation bars 23, and restores them to normal ositions. The bar may be undercut or heveled on'its rear edge at 70, to enable it to ride over any pins 22 which may be accidentally set up-while the general'operator is in the abnormal Fig. 13 position. 7

Upon each of the dial wheels 25 (except the wheel of highest denomination) is a tooth 71, to start the associated tens-carrying train, which comprises a 9-tooth pinion 72 'engageable by tooth 71 and rotated thereby Upon the shaft 73, which carries thedrivpressed into a recess 82 in a collar 82 seing pinion 45, are placed eight spurs or seg ments 74, which are rotated in clockwise d1- rectionat Fig. 10 by the pinion; 45 during the return stroke offlthe general operator.

If any of the tens-carrying trains have not 79 been started, the movements of their associated spurswill be idle, since every second tooth of the pinion 72 is cut away, as at 75, to give clearance for these driving spurs, and this clearance normally stands opposite tothe spur-shaft 73, asat Fig. l0. In case, however, any pinion 72 has been started, the ensuing movement of the associated spur'74 will rotate the pinion through two-ninths ofa revolution; making one-third of a revolution in all.

To each pinion 72 is fixed a' three-toothed pinion 76, to turn into mesh with an advance for one-tenth of a revolution a ten-toothed gear 77, which is fixed to the dial wheel 25 35 of next higher denomination, thereby car rying 1 over to the last-mentioned dial wheel. The shaft 73 is motionless during the advance stroke of the general operator, because it has a clutch connection to the pinion 45, (see Figs. 12 and 15). In a hub 78 mounted on the shaft, and connected to the pinion 45 by a sleeve 78, .is a pocket/79 to receive a spring 80 and a ball 81, the latter being cured to the shaft 73 which carries theseg ments 74. A notched disk 83Iis rovided upon the spur-shaft 7 3,21. spring etent. 84: normally occupying the notch to hold the shaft and the spurs thereon in normal positions. h

It will thus be seen that during the return stroke of. the general operator, thecarry over trains are operated wherever necessary; this carry-over mechanism corresponding generally with that disclosed in the application of Frederick A. Hart, No. 466,836, dated December 10,1908.

Durin' the final portion of the return stroke o the general operator, the computation pins 22 which were originally projected, are restored to normal positions by meansof \a. plate 85, overlying the pins and fixed upon a. pair of arms 86, which extend forwardly from a rock shaft 87 journaled in the framework, the latter comprisin I side plates 88 89, between which said shaft extends, and which are fixed to the main frame of the typewritingmachine at one side thereof. Rearwardly from said rock shaft extends an arm 90, having at its'.rear end a vbevel;91, which is engaged: by a cam or tappet-92 onthe fork 57 of the general operator arm 39; whereby the arm 90 is cammed up, and the plate 85 is swungldown to depress all of the projected pins22towtheir normal positions.

. The cam or tappeti 22'jinall escapesfrom the cam 91, andalspririgfi Fig. 4, lifts thejpin-restoring plate85 to normal position, asat Fig.3. During the forward (h I stroke-of the general operator, the tappet 92pa'sses-freely by the cam 91, the former being pivoted at 94 to the general operator arm, to' permit it to yield. A spring 95 thereupon restores the tappet 92 to normal position, resting against a stop 96 on the general operator arm.. 4

In-the specific description so far given only one set of'computing wheels to form a computing head has been mentioned. In fact, however, asshown in this case, the computing wheels are arranged in groups -so as to form a series of primary com ut ing' heads 99. These computing hea s are mounted on a carriage 100 which, itself, is mounted in guideways 101 and 102 of any suitable character so that it can slide longitudinally to bring the several computing headssuceessively into cooperation wit the nest-of rack bars 23.

lYhile hel computing carriage 100 could ,be.connected directly to the typewriter carriage 7 so as to be moved thereby, in this instance it shown to be propelled by separate means: shown in the nature of a spring barrel 103 connected to the carriage 100 by a tape 104.; On the stationary portion of the machine, such as the frame which supports the guides 191 and 102, there is pivotally mounted a latch 105 which is adapted to engage successively each one of a series of lugs 106 located at. intervals corresponding to the-location of the several primary computing heads. This latch is held by a spring 107 in its locking position so that it prevents the forward movement of the computing carriage 100 under the tension of its spring barrel 103. a

The opposite end of the latch 105 is provided with a ltrip 108 which, during the movement of the typewriter carriage 7 to the left, may be engaged successively by a series of tappets, 109 adjustably mounted on a rod 110 at intervals from each other corresponding the intervals of the tappcts 29 on the flick of the carriage. \Vhen one of the tap-ets 109 comes in engagement with the tr p 108 during a letter-feeding movement oi the carriage 7, the latch 105 will be rocked against the tension of its spring 107 to release the lug 106 which happens to be in engagement with the end of the latch 105, permitting a jump movement of the computing carriage 100, the spring 107 returning the latch before the next lug comes into a position to be caught. This is made possible by having the movement of the latch 105 take place during a single letter space movement of the typewriter a letter-feeding movement of the carriage 7, it will yield when contacted during the return-movement of the carriage so as to enable the tappets 109 to pass idly by. The return of the typewriter carriage 7 is utilized'to return the computing carriage 100. For this purpose there is provided on the shaft 110 a finger 111 bentto avoid parts in the way. and extending forward so as to engage the leftliand edge of the carriage 100.

It will be seen by this arrangement that a series of separate and individual vertical columns of numbers can be added up and their individual totals registered on the several computing heads 99. Itis desirable in addition to these individual totals to obtain a gross total and to crosssadd the columns so as to check the result obtained by the primary computing heads. For this purposethere is provided an accumulating or cross-adding computing head 112'. ,The

accumulating computing head 112 is, in this of the primary computing heads 99 and the accumulating computing head 112, it is necessary that they should move out-of cooperation with each other so as to permit of the relative longitudinal ,movement. In fact, as the invention is here illustrated, the accumulating computing head 112 is always out of cooperation with the primary computing head which happens to be in an active position until such time as a computation is run up by an actuation of the general operator 39. For this purpose the computing head 112 has its computing wheels, indicated at 113, each of which comprises a dial wheel 114; and a gear 115, mounted on a floating shaft 116 which is secured in a rocking frame 117. The rocking frame 117 has forwardly extending arms 118 provided with offset or angular front ends "which form means of support for a shaft-119 on which are mounted idler pinions 120 forming intermediaries between'the gears 115- and the gears 77 carried by the computing wheels of the primary computing heads.

Normally the frame 117 which is pivotally mounted on the shaft 73 is held in sucha position that the computing head 112 is out of cooperation with the opposite. primary computin head 99 by meansof a spring 121 (Fig. 17) which} engages an arm 1220xtending to the opposite side of the shaft 73. This arm 122, which forms a lever with the remaining portion of the rocking frame, is

provided with a curved finger or toe 123 130,

which'normally engages ina notch or socket 124 provided in a cam disk 125. The cam disk 125 is secured to rotate with a gear 126 which meshes with a gear 127 loosely mounted on the sleeve 78' which is concentric with the shaft 73. 4

The gear 127 is provided with a hub 128 in which is located a socket 129 (see Fig. 16). The socket 129 holds a spring 130- which tends to press a ball 131 out .of a cam groove 132 provided in the gear 45. The arrange ment of the cam groove 132 is such that a forward movement of the general operator 39 will cause a rotation of gear 45, as indicated by the arrows in Fig. 11, which rotation will cause the said gear 45 to be con nected by this clutch mechanism to the gear 127, which will, in turn rotate the gear 126, so that the cam disk 125 will be rotated at this time. j

A rotation of the cam disk will force the toe 123 out onto the'cylindrioal surface of the cam disk, tlierebyt' rocking the accumulating computing head 112 from the position indicated in Fig. 13 to the position indicated in Fig. 11, causing it to cotiperate with the .fpposite computing head 99. The ratio of t e gearin is such that when the general operator has completed its forward movement, the notch 124 will once more have come into such a position that the spring 121 can draw the toe 123 ofthe rocking frame into the notch or socket, thcreb raising the accumulating computing hea 112 out of cooperative relation with respect to the apposite primary computing head.

Th tens-carrying mechanism for the accumulating or cross-adding computing head 112 is similar to that for the primary computing heads, and is in part distinct from this tens-carrying mechanism, and in part common therewith.

Mounted on the rocking frame 117 so as to be at all times in touch with the comput-.

ing wheels 113, there are'provided for each of the computing wheels 113 mutilated gears 133, which will be engaged once in a tenth of a revolution of the associated computing wheel 113 by a special tens-carrying. tooth 134, which will rotate the mutilated gear one-ninth of a revolution. The mutilated gear is arranged So that the mutilated teeth will be normally in opposition to the swing.

ing segments or sectors 74 on the shaft 73.

The partial rotation of one-ninth of a revolution will, however, bring one of the teeth of the mntilatedgear into such aposition that it will be engaged by a sector or seg;

ment 7 4 during the return motion of the gen eral operator. T is segment or sector will rotate the mutilated gear through two-ninths of a i-evoluticn making one-third of a revolution in all. g Secured to each mutilated gear is a threetoothed gear 135, vhich will thus be rotated computing wheel of the next higher denomination, rotate this gear one-tenth of a revolution carrying the tens over from the lower computingwheel. The assisting se ments act for both the primary computing heads and the accumulating computing head.

In the use of the device, one of the tappets 29 through the associated set of linkages successively depresses each of the pinbearing column bars, so that when one of the'numeral keys is struck, one of the pins on the depressed bar can be raised above its fellows by the key-controlled parallel linkage. A successive operation of several of the keys and a concomitant movement of the carriage will set up or index a number comprising a series of digits. The general operator is then actuated by a movement of the handle 36 or' any other suitable meansgiso that it swings forward the rack bar 41 which rotates, through the intermediary of the gear 44, the gear 45. The gear 45 is connected so as to rotate concomitantly during the forward movement of the general oper- I ator both the cam disk 47 and the cam disk 125. On the. initial rotation the toes of both of the rockin arms 50 and 122 are forced out of the note es or sockets so that they ride on the cylindrical periphery of the cam disks, thereby concomitantly raising the" racks 23 into mesh with the gear 44 anddepressing the accumulating computing head 112, so as to bring the 'pinions 120 into driven relation with the gears 75. -This all happens before the in bars themselves are inoved longitudinally So that the computing wheels of both the primary and accumulating computing heads will be in driven rela-.

both the primary and the accumulating eomiputing heads.

When the general operator has approached the end of its forward stroke, the cam disks 47 and 125 will have been rotated -a complete revolution, so that the toes on the ends of the lever 50 and the rocking frame 117 will automatically drop into the notchesor sockets of thecam disks, enabling the rack bars'23 to fall out of mesh with the associated computing wheels of the primary computih head, and also enabling the accumulating computing head to be withdrawn upwardly out of coiiperation with the primary computing head in action.

During the return movement of the genstruck eral operator, the cam disks, by reason of their clutch connections which act only in one way, will remain idle, while the shaft 7 3 which remained idle during the forward stroke of the general operator is now connected up by its clutch, so as to rotate to cause the "segments or sectors H to assist in the tens-cai-r ing operation at such points as have become necessary by the passing from 9 to 0 on the corresponding dial wheel. I

\Vhen the general operator has completely returned, the primary computing wheels are free from all external contact so that the primary computing heads may have such longitudinal movement as is necessary to bring the next successive primary computing head into apposite relation with the racks 23 and the accumulating computing head 112. To do this it is merely necessary to depressthe space key or any other key of the typewriting machine until one of the tappets 109 cams the latch 105 to such a position that it releases the lug 106 which happens to be in engagement therewith, permitting the computing -arriage 100 to 'spring forward under the traction of its spring barrel to such a position that the latch engages the next lug 106- to lock the computing carriage 100. in such posi-. tion that the next successive computing head will be in register with both the racks 23 and the accumulating computing head 1 12. The numeral keys can then be struck as before,-set up or index a number, and the number carried up in the same manner on both the primary computing head in action and the accumulating computing head, by

a reciprocating movement of the general operator.

Variations may be resorted to .within the scope of the invention, and portions of the im )rovements may he used without others.

laving thusdescribed my invention, I claim:

1. The combination with a plurality of computing heads each including a set or group of computing wheels, of mechanism for indexing the series of digits of a number, means for transferringsuch indexednumbers to said computingsheads, said means including a series of racks individual to the several wheels of a set, means for causing a relative movement between said racks and said'computing heads to enable the several computing heads to be operated successively by said racks, an accun'iulating coinputinghead, and means for bringing said accumulating head successively into driving relation with eachof said first-mentioned head-s, so that-,the onecan'be driven from the other.

2. The combination,iiyvith a plurality of primary computing heads, each head in-' eluding a group of computingwheels, and

mechanism for bringing said heads one after another into active position; of-mechanisin for indexing the series of digits of a number'to be computed; mechanism for transferring said indexed number to the wheels of the then active computing head,

said transferring. mechanism including a set of racks, one individual toeach wheel,

normally out of cooperative. engagement with said wheels; an accumulating coinputing head iiormallyout of cooperative engagement with the;active primary com puting head; and meansfor-concomitantly. bringim said, accun'iulating computing head andsaid racks into cooperative engagement t same number in the accumulating comput- 35 ing'head. s

3. The combination, with-a plurality if primary computing heads pand mechanism for bringing them one after another int-o iug head; means for running up a num er, comprising a series of-digits', all at once on the then active primary computing head; and means for bringin the accumulating .active position; of an accumulating com ut'- 9 computing head into c riving engagement with sai active primary computing head so that the one will be driven from the-other, to run up insaid accumulating computing head an equivalent ofithe numher run up in the active primary computing 1 head. v

4. The combination with a carriage havingwheels thereon, each having adial wheel computing and a pinion, of racks mounted out of mesh 1 with said pinions andmovable into mesh therewith, a stationary set of computing wheels having means to. cooperate with said first mentioned computing wheels but being normally out of cooperation therewith, mechanism for shifting ,s'eicl racks and said second-mentioned computin wheels into cooperative relation with sai first-mentioned computing wheels.

a series of computing" and 110 5: The combination with a computing head comprising a plurality of computing 7 wheels, of a second computinghead normally out of cooperative relation with'said first computing head, a; series'ofrack bars foroperating one of said comphtingheads,

cam mechanism for shifting said rack bars from a normal inactite position to an activeposition, a floating frame for supportingone of said (xnuputing heads, cam mechanism for for actuating said cai'n mechanisms.

movement, of a computing carriage having.

shifting said frame, and a general operator.

a jump-movement equivalent to an aggre- 1 80 gate number of said step-by-step movements of s a1 d type\vr1ter carriage, a series'of computmg heads on said. computing carriage A broughtindividually into action by the jump movements -of said computing carriage, mechanism for running up all of the digits of 'a number to be computed on an active computing head at one time, and an accumulating computing head arranged to re:

ceive its rotation from any active comput- .first-mentioned computing heads, so that the one can drive the other, to enable said cross-adding head to accumulate the calculations of all said first-mentioned computing heads.

8. The combination with a computing 7 head, of an accumulating computing head,

a floating frame for supporting one of said computing heads, a cam for oscillating said floating frame to bring said computing heads into cooperation'with each other, so that the one may drive the other, a general operator, :1 gear rotated by said general operator, and a one-way clutch connection between said gear and said cam, so that said cam will be rotated solely during one portion of the movement of said general operator.

9. The combination with a plurality oi: computing heads, of a floating support for one of said computing heads arranged to bring about the active and inactive relation of said computing heads so that the one may or may not drive the other, mechanism for driving Lone of said computing heads, a cam for bringing said. mechanism into its active relation with said last-mentioned computing headga cam for oscillating said frame, a general operator, and gearing between each of said cams and said general operator having each a one-way clutch connection enabling said cams to be actuated solely during a portion of the movement of said general operator.

10. The combination with a plurality of computing heads, of a floating support for one of said computing heads arranged to bring about the active and inactive relation of said computing heads, so that the one may or may not drive the other, mechanism for driving one of said computing heads, a cam for bringing said mechanism into its active relation with said last-mentioned computing head, a cam for oscillating said" frame, a general operator, gearing between each of said cams and said general operator having each a one-way clutch connection enabling said cams to be actuated solely during a portion of the movement of said general operator; and, tens carrying mechanism for both of said computing heads having a certain parti'n common, said certain part being arranged to be driven from said general operator and having a one-way clutch connection thereto so as to be operable solely during a certain'portion of the movement of said general operator.

11. The combination with a computing head comprising a series of computing wheels, of a series of drivers for running up numbers in said computing head, one individual to each of said wheels for rotating the same, a second computing head including a series of computing wheels ar-- ranged .to be driven from the computing Wheels of said first-mentioned computing head, so that the number run up in the first-mentioned head will also be run up at the same time in the second-mentioned head, said second-mentioned computing head and said drivers being normally out of driving relation with respect'to said first-mentioned computing head, and means for concomitantly bringing about a driving relation between said first-mentioned computin head and both said drivers and said secon -mentioned computing head.

12. The combination with a computing head, of a series of drivers, a. second com-- puting head located intermediate said firstmentioned computing head and said drivers and arranged to be driven from thelatter and to drive the former, but being normally out of driving relation 'therewith, and means for effecting a concomitant approaching movement of said first-mentioned computing head and said drivers toward said seccud-mentioned computing head from opposite sides thereof, so as to afford a drivin relation between said second-mention head and both said first-mentioned computing head and said drivers. I

13. The combination with a computing head, of 'a series of drivers for running up numbers in said computing head, a second. computing head arranged to be'driven from aid first-mentioned computing head said second-mentioned computing head and said drivers being normally out of driving relation with said first-mentioned computing head, a general operator for actuating said drivers to drive both said computing heads, and means actuated by said general opera tor for bringin about a driving relation between said rst-men'tioned computing head and both said second-mentioned commrmmz said shaft t maintain earl and sad tans mrrying m aha same gemral reim- (rf csmputing bra ls mor ntermuiiism said actuactuated means, as mated by the farmer, and :7 eperam the latter, and 11g concomitantly bath said animated medals into eneach said wzriputing;

inert-ion with a 0f 096m 1 firiven maziianism irmiuL zcm'psfing Wheeis, ii, 20.15pm

r sawween said set at lliecizzmism, so 'ixhat ail mnputing heard may be posi said drivers, and se that aaii driven. mechanism may M ,ven by said computing 1.10mi, sms. mmputin head transmitting the zi i'v from said. set- Off drivers m said driver:

The qnhination :f a primary 331m rr hanism fer indexing the a number m be somrmmd qeistad mu: 21g hand; and means fer dam "raging Saki ascumulatm am,

J D puting head sax. racks inw cuperai-iva with said primary crmrg mting head, if

the indexesi ZHEIIliTiQ-I" in the primary comput- "Tilflg mad, him iatber to run 11;: the same numitiar accumulating conqmting 37mm";

ii1atiuzi,'with if camstive posit-inn; 0f me/011w up a muitl digit number amguting heaai a m piv t iatter 0am firi've @he firmer to enable said 6 cressmdding herd caneurremli 1d, the s: five camp i v 1?. The cembination, with a seris of comput; means controiieri said carriage far bringing about fire mm ant 0f said heads one after anether inf/Q A re position; of mechanism for running up a multi-digit numb all at once into than zwtive head; a gen" Qrai operaturfor actuating said running-up mechanism; iiv cr0ss-adding head independent 0f 00mm by said carriage; means actuated by said general operator for bringing about; the driving relation 0f ithe erossadding head; with active camputing head, 313 that the iatter drive the farmer to enable. said crass-add 1 id in run up rein, (3031 32. rrentiy 3 h the acfiiva comhemi, 511mg number that is run up in active; ccmputing head.

20. In a cempating machine, the combination with a primary computing head, of can mare run upytherein, art ve eomp'ziimg up in said rying members fiherefar initially settable by therefor initiaiiy sei table by said econdary camputing head, and carrying assisting mechanism riding common. in all of ing numbers,

2L In. a compuing machine, the combina- Uimi with plurality of primary computili saris, of carrying mambars commcrn to a f said head, a i flailiy settubie by MW read, a smss-mmg-uting read. actuable simu iarweousiy with 1 mar cemputing head, carrying members in; all; settable by said cross-con'iputing hard when said head is acmated by any 911G 0f said primary computing heads, a; ifcarrying assistinfi mechanism inc-India gears summon to a l of said carrying mem rs, each of said gears acting to completely operate its associated carrying member common to the primary computing heads and also its associated carrying mem ber of the cruss-com mting head.

BURNHAM c. STIGKNEY.

Witnesses;

F. Axmxmmrx, JULIUS heads, typewriter carriage, and

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