US1279863A - Combined type-writing and computing machine. - Google Patents

Description

H. HANSON.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLLCATKON men APR-9,2915.

ISHEETS-SHEET I flllll llll Patelilted Sept. 24, 1918/ HANSON..

\ cumameu TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED APR. 9. I915.

Patented Sept. 24,1918.

ISH'EETS-SHEET 2.

INVENTOR M ATTQRNE? hnnnu WITNESSES:

H. HANSQNV COMBINED TYPE WBITINQ A'ND COMFUHNG-MACHINE.

APPLICATION FILED APR. 9. HHS. V Patented Sept. 24,19l&

ISHEETS-SHEET 3.

WITNESSES: mv emom W BY @4/ I e I ATTO NEY.

' H. HANSON. COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED'APR. 9.1M!

' PatentedSept. 24,1918.

Z8HEETS-SHEEY 4,

INVENTOR;

ATTOR EY COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED APR. 9.

1 s i 5. l

Patented Sept. 24, 1918. f

I SHEETSSHEET 5.

A H. HANSONi 4 COMBINEDTYPE WRITING AND COMPUTING MACHINt.

I nrryncmou men APR. 9.19%; 1,279,863. Patentedsept. 24,191&

I SHEETS-8IIEET G.

NORMAL Pas/110w ATTO NEY- H. HANSON. COMBINED TYPE WRITING AND COMPUTING, MACHINE.

I I APPLICATIQN FILED APLS. I9I5 Patentd Sept. 24,1918.

TSHEETS-SHEET I.

v number hasberfcqmpletely, set up, general numbers thl1$f$8i3 up into thq cqmputingxwhels; The

combined typewriting and computing'ma- 4's ihflqo ri'esponding pin: on anyrack bar which PATENT-OFFICEQ ma HANSON, or marrow), connmmcv'r, Asammm, BY ninsim assiemms,

mo rmmmwoon comrumma MACHINE comm, 01mm from m x, 4 0002126 M'I'ION OIE' NEW YORK.

cdmsnnm mYP -wmmfim Ami cipnimimgimgcnmim Y To allwhom it may apnea/m Be it known, that I, H ya iding in. Hartof Connecticut, having invented certain new anduuseful Improvgnmnts in Combined T :VVritihg and Computing Magihines oi .cor nput ng wheelsa m broughbiinih. mesh, 7

winch thefol lowing is aspe-cificatibn.

- 3 My invention relates 'to computing: na- 10 ,c hines a nd is hegein gii s closed in large part is" an lmprovement on n'iy Patent, No. 005,431, dated December 1, 1908. Said pat" ent discloses a combined typmvriting and Computi' inachinefwhei ein. the numeral 15 e keysfgf iypewritr se't up on womputatiop; membem equivalentsofpnumbe rs to be carried itdcomplitingwheels, said commit-i ir giwheel gi i orn ling a totalizer 0r cpl-11pm n "20 v shown is p the.usl1a1 Underwood type; and" the carriiaga offth typewriter as heuci.-- n and iaten t the typq'wr ting machma imlon'g s elects pins mpresenting the typewriter ape opeimitor is Mtuated 'to carry the chine of said'patent is provided with atrqhS- pqsition devise whereby numbers, as prmt ed ori the worksheet carried by the platen (of the typewrlter which travels to the 16ft,

i so;

machine may i lij'btra'ct For this purpose each of ti1e1$0mmay'bereglstemd on the prdper cmnputing wheels beginhing at the left.

*For setting the. pins on the rack bars thgre is providedwseriekaof setting bars-0r link-- verse row of pms of corresponding values. Thdconnectiuh i5 such that whenever :a numqmikey I ting bar, whidh is, mounted on bellncravnk ai'r n s, isjSwung intd a deprwsed osition, midin sofiwingingibwill strike an depress has beerifiseiectedby theltypewl iter carriage, to accord withffhe denominntlonal whgmn being Writmn j'ih on the wQrk-sheet.

Acbrding to the present invention the be adapted to either add. or

' putatiomorrack bars rimybe fonnediwith ants in one directionfbt addition is operated, the 'wrlsponding set ever Lhq typewriting mgw hine reaqhe two mekstlmwon, one fdniddibion mind i 01. subtraction, and tha mputi'n 11991 5 may be normally 110141019341 0f Qai -1 ack-lliflrs Tim nmchine is infer-ably snja nged um normally when t e general gpg'mtbr is flaw: atedgthe addftion mcks ofthn m1; mid

zThel computing he- &. i-whilel nun.

ufljOIl'l the computation i si fiicie'nt to cm sw: one cumputing w'helg -w directlyope-13mg another, On; theflrettlrri stroke of thugenetal operatorlizh rmckvbamj "are earned batik 1hr) ,lbeifjj normal ii whi mejnine apa 'ryflver subtracting 0n I Any compufihg z eroto the sight 011 I set a, canry bi er x'nm'nber, 21nd saidcar'ry-dver member may give. the. adjacent computing wheel of next highmi' tieriomina titin onqllnnltm 1 of a revolution 0n the return strokedoi the; gm'mra] operator. Said awry-over devices, 00 which thush re setymmyi d arranged to -opngiim tlheother dirggztibnfOfshbtmcstiom (f; 1 The; ,typewritelflcarriaga selects the rackj i above; b 3% In rack bar' thei eon. 1"

A. dog mmmmd, likeyfihe denm'ninatiqp Mating (it)- s 'maly be utiliztridhto unborn sally set, tiwniechaniieml. tp s lli liilfah determined 00111111 Tbbxjfinga lwg li Quit the subtiahtim (iiigmrJiUqieSY subtracting ley'e; which controls" ,lng ofjthe hassl ng {my my theusual subtraction'bar and is cammed by \Y the denomination selecting casingor frame similar to the denomination selecting levers.

In order, however, to prevent the machine from being left at subtraction accidentally, a connection may be provided from the general operator whereby the operation of said general operator will release the subtraction bar and return the mechanism to adding position. l v I An important feature of this invention is theprevention when desired of the return from of the error-correeti-ngt mechanism. The

a' subtraction at the actuation in, error-correcting nihchamg'lilactuatee by unup tip the time of error. mec anism o'perat *release sleek-norm y'lhold 9:

eral operator also actuates mechanism to return to addin ing mechanism after the num ris run'up "ifinto the computing {intotglay manually,

traction setting mechanism has been brought the restoration to adding actuation of the error eorrectin mechanism may be prevented by a specie lock. 'When thesubtraction. setting mechatale error-correcting nism-hasbeen brwbu ht into play automaticall),- the spring o the automatic mechanismis strong enough'to oppose the action of the spring f the subtraction setting. mechanism even though the lock for the subi actionsetting mec anism is released by mechanism.

Other features and advantages will hereinafter' appear.

v the accompanyingdrawings,

Figure 1 is a sectional side view ofan. Underwood-Hanson combined typewriting and computing machine, showing the principal parts necessary tounderstand my inventi'on.

2 is a. section through a one-way clutc forming part of the carry-over de- Fig. 3 is a perspective view illustrating the operation of the carry-over devices;

Fig. 4 is a plan view of some of the pin bars used for computing, the subtraction .har, and some other parts associated with them.

5 is a sidev ewof a P it Fig. 6 1s a sectionahfi'ont vmw' of pin bars, and part'of the pin-setting mechanism iorsaid bars.

Fig. 7 is a plan view of thecomputirg' mechanism taken mostly from a point just .above the top of Fig.6.

' Fig. 8 is a perspectlve VIEW showing in skeleton some principal parts of the present invention, together with certaln related parts.

the computposition.

wheel's When the sub- 22 is a side view of the parts atjhe vFig. 9 is a side view of the computing wheels and certain adjacent parts, when add- In I v %ig. 10 is a similar view showing the parts when subtracting;

Fig. 11 is a similar View when set for tens-carrying in adding.

Fig. 12 is similar to Fig. 11 except the it is set for subtracting. Fi s. 13, 14, 15 and 16 show the driving mem er of the carry-over devices,-in succes- 'sive sections.

Fig. 17 is a perspective seen in Figs. 13 to 16. 1. Fi 18 is a front view of a subtraction- Fig. 4 at a big or level.

ig. 20 is a sectional front view of part of Fig. 19. r i Fig. .21 is a view similar to Figs. 9, -10, 11 and 12, but showing the parts in normal Fi com etion of a carry-over.

, Flg. 23 isa side view of the ing parts atithe beginning 0 ing operation, when adding? ig. 24v a viewsirfiilar to Fig. 5, taken from the/opposite side, showing the relation of the parts in the pin-setting operation. Fig. 25 is 'a skeleton perspective on a larger scale, of some of the parts seen in Fig. 8 but bringing out especially ,the subtraction'controlled connections. Numerals keys 1 and alphabet keys 2 operate through the usual key levers 3 and 4 to a tenscarryvibrate type-bars 5' upwardly and rearwardl so that they strike against the front of a p aten 6 mounted on a'carriage 7 which travels on a rail 8, and is controlled by a j rack 9 meshing with a pinion 10, connected principal movview of the parts I ig. 19 is a lan viewof the front part 1 to an escapement wheel 11. Each type-bar has a heel 12 to engage a universal bar-13 mounted on a. frame 14 which operates a rocker 15 having the usual vibratory dogs 16, 17 to en ge said escapement wheel .11 and permit e'carriage to feed step by step unld pr the imp lse of the usual spring barre I The computing mechanism includes an index mechanism comprising pins on which numerals are temporarily set up by the nu-- meral keys. For thispurpose each numeral key 1 has a pendant 18 to engage and depress the corres onding one of a series of rock arms 19 ig. 6) which are arrayed across the machine, being mounted upon the forward ends-of rearwardly extending hori- 'zontal rock shafts 20 (Fig. 7), forming parts of linkages which depress the index pins 27 on which the numerals are tem ora'rily set up. Toset the pins each rock aft carries an upstanding arm 21 to engage a wrist 22 upon a horizontal link 23 which extends step hystep; the bnrsQB are diep I wtirdly one after another to positions to *theirpins Withinfrange of the demammal-S126 (Fig; 24), so that nnyhar pin on'the r. nv suitable means mnv be em loyed for displacing the fromeide to side of the machine. At

:BIldS each link connects with epuir of. hell "cranks EM (Fig. 6), the long arms 25 of which are connected by linke'or depressor bin-e26 whieh icsoend to press downthe index pins 27.

lilnclrmimeral key determines the valueof the index pin thus set up,the numeral to be computed, while the typewriter carriage 7 determines the denomination by the bar on which the in mounted. .For this' beneath the links 26 and serve eventually to presently to be described.

Normally the index pins are set out of the (Fig 5), but, as the paper carr uec ad f I a, or-

26 may deprees its corresiondin forwardly displaced pin a inhe'rs orwnrd y one after enother, durmg the'niioveiment of the paper carriage but there is ehown herein for t e sake o illustration, n, mechieia-nism for this purpoemwhioh will hepreeently referred to.

Such. Index p1ns27 as are depreseed,

ject belowthe bars 28 on which the are carried, and serve as lugs whereby aai bars may be driven end-wise, forwardly, for turn,- ing the number wheels. 'I heyare driven by means of a universal driver'orgeneral op tel cross bar 29 which is brought forward once for every calculation.

The general operator in the Unclerwood- Hnnsmrcomhined adding and typewritirg machine; comprises eide bare (Figs. 1 and which 'slide in guides on the shdewn-ys on the iran ework, nnd are rigidly united to fornia elide or carriage, said cross bar 29:

.lIiflIS 30 together. .Thieceriiege or moral operator they be driven H1 tiny suitnb e mam er, as, for example, 1r crank 31 which ie fest upon a transverse horizontal rook e'liaft 32 journalccl at it's endsin the Imme- "34, the latter meshing with formed upon the general operahnrs. The i'lltl'i'mi'lflflt of the crank or 28 in the decimal oystei'n rotate the number wheels 38 in a manner path ofv movement of the depressor-burs 26 7feednft I My helddby a' spring 41Fegninpt l. ato'pflhao, :that. theme thereof forms at ri ,6. mt if,

ingthe 111116143 from the cam pos tion e hown in Fig. '21 to the; p l

in -the direotiono "the erf orator which includes a transverse horiz'om fori'mngone of the CliEWlGQ'S for tying said into m;-sli with, the

55 work of th machine, end-carrying (Fig. 1) gments' 33 which ineeh with fioi -wurilly from the'l ig. 1 poeition causes is fixed to a number or computing wheel formin one of a. gang, there hem bar 28 or each number wheel. 10

' ber 'wh ee1s are arranged below :1 opening 39 in the anal of the machine. The cross bar 29 w 'ich en: reeeedindex pin is placed some i MW. ehind saidins, so as to permit consider-"78f able lostmotion oi the finer-a1 oporntorbe-f fore the first pin can 1 7 8 "1 crossbar and during thisloetl motion the? racks 36 become meehedwith' tho number wheel inion 3i". This result iselhmdin 80 the fa lowing manner: :Carried upon the powerrshaft 32 and rotated thereby '13;

40' (Fige l, 8 and EM whioh, as soon Ill 9f crank 1 starts to turn, an a."

141 pivotedetd2 u'pon'an lmn not il -ti ever &5. Therideror pawl 41in normally y'whenthe cam diek "40 00;

row inthe-let'ter figure, the cam mrhea 6T- of the disk40, no t e pawlflzridea'from the tion thereof; will 'When the lever isner, it willdraw down a pnir o'f and 57, which are pivoted 0,17%. 011 the lotward end of the arm lififlnndthe lorwlir'd end of one arm of the lever 45'. The links M and 57 are connected'at their upper ondfi to f anarbor 4.9 onwhich'ull of the; n or mimber wheelie and the piniomlj B therefor are. moimted. Alsomounted-on the or or 4:9 is n, ehifting frume including side plates and 51'. i r,

It will thus beseen that whenthe cam 40 is' rotated to the position. shown inFig. :9, it will rock t he lever 45 end the parts connected thereto which form n shifting frame, so that thepinione 37 will-*be drawn down;

addition "racks B6 on the reek hers 3 a Hence as the general o rntor eontimm'to drive forward under t ie lim'puloe of the crank 31, the Einions erofjturned clockwise at Fig. 9 and e numberiwlieele aro'turned in the some forward direction, thus performinn addition; each number wheel beingadwinced. ,to an extent dependent upon which ,ofits index pins 27 monomeric:

After-the crank 31 has been given:

forward stroke, it is ewun ...ba=ck-wardly 'rrormal position to restore t egfenernl open;

minor portion of thediak to the 1 mm on e m fromjthe axis 32 of the disk 40 no I to p the lever 45. The; lever-.45 iaiixed longer as a strut, so that the arm 43 tor to its normal position. At the initial portion of the return stroke of the crank 31 and its shaft 32, the rider or pawl 41 turns counter-clockwise against the tension of the spring 41 owing to the friction on the disk 40 turning in the reverse direction from that indicated by the arrow in Fig. 9. This renders the rider 41 incapable of acting any is permitted to approach the cam disk 40 under the traction of springs'47 (Figs. 7, 19, 20 and 21), which now act to draw rearwardly \l-shaped or double cam levers or arms 47 pivoted at 47, which engage the ends of said arbor 49 and'thereby centralize or raise the pinions 37016811 to their normal positions.

- 1 This movement, which withdraws the pin ions 37 from the addition racks 36, takes place before the racks themselves start upon return being preferpreviously carried the racks forward. The cross bar 29 for this purpose engages (see Fig. 24).lugs-48 pendent from the rack bars in the rear offthe cross bar 29, but the latter is arrangedjto'have considerable idle rearward motion (enough to permit collapse of pawl 41) before engaging said lugs 48.

; At ,this point it may be noted that-the arbor 49 on which the number wheels 38 and their pinions 37 are mounted, connects the two s1des'50- and 51 of a swingin frame bearings or'sockets at 52 to swing. upon collars 53-carried by a transverse horizontal I rality of tie-rods 55."

= the bar 28.

connected tojthe general operator "Fig. 5, durin shaft '54; this shaft hinged sipportfor said frame 50,51, and keeping e' compu wheels always in proper relationship to t e shaft 54, which is and'carries certain prime moving tens carrying devices, as will presently be explained. The side members 50, 51 are also connected .bya plu- Upon each of said index pin bars 28 is carried not only an addition rack 36but also a subtraction rack 59 which is idle, as at an addition operation. This rack is paral el with the addition rack' 36.

but above the pinion 37 so as to rotate the same in-the opposite direction, and is connected by an arm 60 with the forward end of To cause the machine to. subtract at the is only necessary to move the computation pinions 37 into "mesh with .the 4 racks 59, instead of the addition racks 36,

sothat the number wheels will be turned backwardly at the'ensuing forward drive of the index bars. 28.

rear of the machine.

I of the rack bars 36, at the same time restoring the parts '43 and 45 play ,asecendcagn sleeve, which is pose of subtraction.

general operator,

will depress,

10, 11, 12 and 21), w ich has to forms spaclng disk 64 and an forming a convenient.

45. ThelererA subtraction rocked in' one direction or ing to which disk 40 or 64 is inaction. The

When the operator desires that they machine shall perform subtraction, he presses rearwardly a subtraction key 61 on'the forward end of a rod or bar 62, which extends from front to rear of themachine, and slides on suitable supports 62 at the front and 7 Between its ends, this rod carries a cam 63 (Figs. 4, 7 and. 25), which, during the backward thrust of the rod, engages the end of a sleeve63 and forces the same endwise along the shaft 32 against the tension of a spring 63. The.

sleeve63 carries the cam disk 40-with it so that the latter is displaced sidewise relatively to the pawl 41, thereby interrupting the cooperation therebetween and preventingthe rocking of the-lever 45 by the .cam

disk40. At the same'time' is brought into disk 64 also fast to said effective only for the pur- This disk 64 is arranged to' coiiperatewith a follower or pawl 65, which is out of line with the pawl ll, that is, ferent plane sc /as not to be in action saine time. The I same plane as its pawl 65 when the cam disk. 40 is shifted out of engagement with tee pawl 41. Y During the ensuing forward stroke of the the cam disk 40 will rotate idly; but the cam disk 64, as seen at Fig. '10, by means of the cam surface 68 which connects the minor circumference of the disk with the major circumference thereof, the follower or pawl 65, which is normally held by a spring 65 against a stop strut between the cam arm 74 rigid with the lever 5, the shaft 44 and the arm berocked so as to. force upat the .56 will thus wardly the links 46 and H57, thereby lifting the frame 49,56, 51, 55, and carrying the pinions 37 inio mesh with the subtraction racks 59, so that the latter are enabled to turn the number wheels. backwardly during disk 64 is shifted into the 5.

it works in a difthe remainder of the forward stroke of the 2 general operator. On the return stroke, the

pawl 65 will tilt against thetension of the spring 65 to a receded. position, releasing, t

e arm 74, so that the V-cam arms 47 will force the number wheels and their pinions 37 clear of the racks 59.

It will thus be seen that the springs 41 and 65 normally hold the pawls or riders. 41 and 65 in a position to engage their respective disks 40 and 64, so that as one or the other rides from the lower circumference to the higher circumference by way of the cam 67 or 68, the bell crank 45 will be the other accord pinions 37 will, then be brought into engagement with the addition racks 36 or the sub- 1} traetion reeks 59 to rhtete the computing wheels in ,e

' 15 'tion or enhtriiiction 11' eetive y. The mnnti "citation. of eitherof .he enm disks 4:0 or 1 ilte ite pewl or rider 41 or 65, 50 that the" eotive to Space 511.1116 ineff arrow to Whioh it is connected. from the reep tire ealn disk.- The1*efr.ire,-injepiteof he fact'thnt the surfacehirthest from the enter of tlna elmft 32 ie in. notion, the oceordilnt arm 43 or 74, which has just been roeked to bring about an engagement of the p'niion e 37 with one of the rate "36 or 59,

The permitted to approach lrer to the er offthe sl'inft 32 under the traction of sprin' in but also is 4,3'anl1 74 iositlon such 11 t H oi'inect (l thereto oe ii':inil-po the lever 4th and the ith the rhino .ct'lve hm c ectioii, w

' 'tohringhhout an mldit M1 or n. snht c ation between the pinii' 1545 7111111 the racks 36o'r i The co n nlislo m,

.hnt is t) .11 on t hz'iiii 2 by:

" 3 m an arin T fixmil 1 t'h rough, in hole Elimiil wi i ich other.

. .ft i has nleo esecvf enhtracting can '0 16) for ,horr' 'ing .1 "ion. Theeame mti've in their forwardor a. backward clirec- 4.7, which. not onlydrew the is 37 endthe 'linl or comp tlng wheele nent rotation of the x 79 but brought up into mes much as both. (,lielxa. ere

end il -i v detent I32 (Fig. 7) preventhackward ll rotation of the shaftM. I

Enel'x.mnnherfwheel (except that of lowest clenol'l'miatlon) has an individual tram of mechanism for. connecting it to this powerclriven lens-cor ymg shaft 54, tohe driven therefrom. The train, l'iowever, is normally lmuken, and hence the tappets or camei'o,

are all normally inefi'ectijve. .Eeehnumher wheel 38 (except that of highest (lemmiinetion) has a starting tooth 77, the fitlnetion of whiehie toesthblieh a connection froln the number Wl'ieelof next hi her denornirmtion to thetene-carrying s aft 54, when it is necessary to carry 1 tool borrow 1 from the next higher wheel. Each of the trains of connecting devices ii'nizlucles (Fig. 3) a pawl 78 to mesh with a gear 79 fixed. u aonihen r mber wheel 33 the pew] preferalily having mnltiplefteeth 80, or being in the fornrof a. hhort rack, as to engage and operate the gear 79 when moving from an offset position at either side to n mid-position. Each rack or pawl 7'8 is nornmlly out of mesh with its gear Wheel therewith in timeon the return stroke of the. generalv operator during thejeerry-over operation. Each melt or pawl 78 is also normally in a neutral nonrdriving 1'nid- ;)ositi0n','hut the starting tooth of each eomputihg wheel on (.(Hl'lplPtillg'1 cyele corresponding toithe ex (hung value between it and the next higher conmilting wheel, shifts its pawl to'one side or the other for 'a subsequent dr ve in, one

direction or the other. according to whether l ie'to he carried or borrowed.

To tl end, the pawl 78 has a pin-and-z e'lot: co neetion. at 81 with. a double hell crank: lever, tumbler or; rocker, S5, 93, which 19; in the mitnre of an mterponent device heand t nox'nher wheel rotating pawl 78. lever he" ii lower arm and. an upper 93 and. pivoteclibetween its ends upon rhor It also has a short arm 83 pro 'v' (i wi 1. pin. 84 in the path of saidstarb ing or eetting tooth 77 to he swung in. one

Wheel, 38, engages and depresses the I)... together with the arm 83, swinging Jponent-lever or rot n at Figs. fiend 23. ltjiwejror'n' 85 oi sa'iri leveror r v'ker. )t to engage with the in 81. m the giollhc Fig. '11 )osiition is the completion of: a full joycle of Shirl 12.0

'erto the IJOSIF- he normetpoeituan ntF'ig.

10.5 ti-veel'i the power-driven tens-carrying cams swung into the path of the associated adding T 85 is a cam-liLe'tooth. 86

9. Upon said arm is seen. as having been which at 1.

tappet 7 on the tens-carrying shaft 54., the function of the latter being to act u on said tooth 86, and thereby return the rec er forwardto its normal'position. During such return movement, the rocker arm 85 carries the gear with it the pawl 78, which, however, has. in the meantime been swung up into mesh wi I 79 of the number wheel next higher 1 than that which carries the setting tooth 77,

ifts the forward and 51 formin permits the shi ing of the gears 37 and the tens-carrying mechanism about the shaft 54 as a ivot- The forward springing of the pawl 8 is effected in this instance by the engagement of the tappet 75 with the rocker Di/i186.

' B means of said pawl 78, the higher num r wheel is advanced one point by the r so time the rocker 85, 93 reaches its mid-position shown at Fig. 22. The cam 87 has a continuation or dwell portion 90 (Figs. 22 and 23), which holds down the rear end of the pawl 78 during the wheel-driving movement, and which at the end of the driving 7 movement releases said pawl and permits the forward end thereof to be snapped down that the tappet95 camming or acting is to difi'er'ent planes fromthe em tooth 9-} is correspondingly oiiset from the 60..

by a. spring 91 (Fig. 9) out of mesh with the gear 79; a spring held detent 92 engaging the latter to hold the number whee in position:

At the snbtracting operation, which .ineludes what may, be called tens-borrowin the setting tooth 77 on the number whee which is traveling counter-clockwise (Fig. 10) lifts the arm 83 and swings the rocker 85, 93 to the Figi- 12 position so as to carry the lower end forward and bring the awl or rack 78 to an advanced position readiy to engage the pinion 79 and effect a backward movement thereof.

The upper arm 93 of the rocker has tooth 94 which 'at this time is swung in t% thepath of the subtraction cam or tap 95 on the assistingshaft 54; the tappets 95 being spirally arranged and being paired with the tappcts..75-. The ta pets 95 are is 75, and the '96 of the awl 78 and elevates the front end thereo into mesh with \thegcar 79,

a 0 94s in swingingjthe ,uocke'if' 93;.

the tooth I from the side plates l $0.

of the three positions.

.ifihwel arm 93. The cam 87 depress bs the rear end migSifiSE 93. 1 5 6f he normal, midway. position at,

an... i

pinging wheel 38. ht the conclusion of the tens rowing operation, the cam 87 releases-the rear end9fi-of the pawl, and the forward.

end of the "latter is drawn down by the spin 91 as before.

tappets and 95,

groups, as seen at Fig. 17 are arrange spirally on the shaft 54, puting wheels are successively operated by 'draws'thpawl 'rs backwardly iant-tat. j 1 step reverse movement to the associated com- 'Eac cam 87', together with its-associatgdy forms agroup, and sad;-

ii." so that the comthe carry-over devices from lowerto higher denominations.

It will be seen that be re rdedflas a tumbler or interponent since it enables the pawl 78 to be operated the rocker s5, 93 ma y by the tappets 7 5, 95 on the power shaft 54;

and. .that the operation of said rocker, as effected by the tappets,,resembles the operatio plpf allet in an es'ea'pe'ment mahamsm;

0 rue or or tumbler 85, 98 ish inany- V of its three positions (Figs. 9, 11 and}? means of a pawl 97 pivoted upon are which rod connect! the side lates 50, 151 just infront of the rod 55, andsaid pa'ql is premed downwerdly'by a spring 99 coiledaround the rod 55;the paw having three" notches I w 103 on the tumbler tohold the same'inaany It will be seen that the sidesof the notches 100 and 102 are extended to form hooks vwhich positively stop the rocker 85,: 93 at each 0 its extreme positions;althou'gh, if

desired this rocker 85', 93 may be positively by the engagement of either tooth arrested 86o!- 94 with the circular hub portions 103" of the disks on which the cams ortappets 75 and'95 are formed, Fi 16 and 22.

It will be understood t iia speed with which the power-driven te'nscarrying shaft 54 revolves, the tappet 75 is apt' to. operatev the tens-carrying rocker 85,

93 at such speed, in swinging it to the norm1 position seen at Fi 22, that the rocker.

they'number wheel with the pawl 78 an might overthrow. /To guard against this,

there are provided on theehaft 54, stops 95" I concentric with saidshaft and merging into ,or being continuations of thetappets 95. These stops 95 are so placed that each occupies the path of, the tooth 94 on the associated rocker 85, 93, when the latter is swung t e tappet 75 from the Fig. 23 position to normal gnition at Figs. 21 and 22. ()f s aft 54 isrevolving, and it 100', 1.01 and 102 .toengagea'ipin;

t, owing to the no v for a brief period that the stop or ion 95}; remains in the path of th, shoulder or projection 94'; but this is suflicient' to prcvent'overthrow of the is? Preveiited I operation wing-tens in a similarjmanner. At.

( r 8 9 is hdwn a ro ked oyer to begin a subtraction operation; and

' throw of the rocker 85 at the subtraction or tens'borrowing operation,- the stop or dwell 95' being suliiciently long for this p oee. That is to say, the outer margins or gw'ell portions of each pair of tappets and for eucl'r of the dial or'computing' .w'heele '38 are arranged with respect to each other that as one of these tappets en gages; its associated tooth 86, he on the rocker or into orient 85, '93 to swing said rocker to emit. -positi .)n, the dwell portion of the other tap pet will come into the patl'i 250 86 according to wl'iich tappet is in action, so as to prevent an excessive nu'wcl'nent of therockcr 35, 93 beyond the n'1id--pi')sition ehownin Fig122.

The number wheels have individi'lal tenscarrying trninseach comj'n'ising the tumbler 'Bbf'fil, the me 97, the tappet 75 95, the

pttiwl 78 am the gear 79. It W11 1. be Ul'llIIl GI "that all of these tens-carrying trains 10 are mounted upon the swinging frame 50, 1" '51, and, therefore, that the nlilmljier wheels with their pinions, detents 92, gears, and

Mme-carrying trains swing up and down as a unit almnt said powershatt 5-2}, which a *eupymrt for the rear end. of said frnine already explained. Owing to the ,iuctthat them members swing up and down we a unit, the carry-(Nor mechanism includin}: the setting tl'jroth- 77 is cnablcd'to per- 401mm its functions properly whether the wheels are in the addition positionas at Fig. 11. or in the subtraction. position as at Fig, 12, i

The reason for arranging the tappets 7 (and tappete 95) in spiral relation around the anti-sting shaft 54, that this enables tens :to becarried upon the number wheels so that "the machine is capable of carrying 1 over 'from wheel to wheel '0 throughout the entire set at the tens-carry ing operation; the operation of one tenscarrying trainbeing finished before the 0pera't'ion of next higher train can begin. The pawls 78 maybe guided at theiri-ear zin'ia comb 104', and any suitable provision may be made for guiding their forward ends, asflfqr instance; said forward ends may be 'confinedbetwoeu the racks 36 andhthe dial Wheels '38. N

The subtraction rod (Sills held back durin itheelibtmction operation by means of i a latch L105 (Figs. 1, 84 and 25), which riveted lfll'l-tupon the framework and is rlileldby e spring 107 in, a notch -10 inthe latch is automatically of movement of its accordant tooth 94 or 111.8 to engage a notch 1119 in 'the rod a it wouldbe set up. It is hence net ing rack bars 28 be displaced individr' meral key and correspon I .natlonal column in which the released at the conclusion of the operation of the tens -borrowin over meehal'lism has been compfiated. This. latch-releasing operation occurs simultaneously with. theraising of a universal plate 108, which restores thein-dex pins 27 to nor. mal positions. The pin restoring plate 108 operated in the; usual nipnner, and is pin oted as usual upon bell, cranks 109 connected by a link 110. i v

During the last part of thereturn stroke.

""of the general operator, a pawl or-abutment 111 on one of the sidebars m i' suelly en'- gages an arm 112 rigidly connected to an iii-T11 112 to cause the" latter "to "swing upnrardly and thus raise the plate 108, thereby l fting the index pins 27f Thereupon the arm 112 trips oil from the abutment 111 and the plate 108drope.v H 85 During, the risevof the late 108, an e'rm'" 11.3 connected to one ofsald bell cranks 1091 ,siirings down and strikes a heel 114 on ty '1 \qj latch. 105, thus withdrawing the same from" the notch 107" in the subtractionfrod or bar; (39 so that a spring 115 (Fig. 7) may snap? the latter forwardly to normal position, as seen at Fig. l. I a

It will be seen that the arm 118 is fixed upon a rock shaft 11611 ,on. which one of P5 the bellcranks 109-is fixer; If it be desired to retain the key 61in its rearward position, a bolt 11? 18 and: 19) may be slidto the leftvby means of a fingeriece" lilo spring detent 120 holding the bolt in eitherposition. y

The index pin bars 28 they be guided at their forwardende in a comb 121 (El 1') extending between. side plates 121 6? the computing head. The bars 28 may be-confined between said. comb 1221 and a rod 122 extending across the tops of the pin bars 28. At their rear ends the bars may be gifiidedin a fixed con'1bv123.

It has been stated above that the pin bars 28 are nori'l'lally ltmated-in such apposition that the pins 27 thereon are' not sposed directly below thei iwin-setting bars 26 but offset to a position liietween the same, so that if the numeral. keys were depr (1 no pins carriage moves step by step in mg direction to com into dilfcrentdentin: national or dig t col inns that the .in bcar- 1 iv and in sutnession to correspond with the denominatio'nal colun'm at the printing point,

and to bring the pins 27 on the properpm bars 28 directly subjacent the pin bars 26, so tbat'when a numeral k I actuated, the pin corresponding to the numg to the (lflllOInlr number planted, w ll beset c a the-movement of the typewriter carriage.

For I displacing the index pin "bars 28" preparatory to setting the plus thereon, there are provided upon the typewriter carriage one or more dogs 124 (Figs. 1 and 8).

These dogs are herein shown as adjustable Inasmuch as the carriage 7 feeds from right to left, each dog 124 operates a series of denomination selecting levers 128 individually and seriatim, beginning with the [one farthest to the right and advancing to the one farthest to theleft; Inasmuch as,-

however, when the computing head comprising the .wheels 38 starts with-the computing wheel of highest denomination at the left and proceeds sewkitim to the computing wheel of lowest denomination at the right, the order of operation of the rack bars 128, which cooperate with the computing wheels must be the reverse of the order of operation of the dogs 124 on the denomination selecting levers 128.

To enable this reversion of order to be brought about, the denomination levers 128 are pivoted intermediate their ends on a pivotrod 129, and the levers are so formed thatjthelever, which has its upper end at the right, has its lower end at the left, and vice versa,";and similarly for the intermediate levers. To obtain this result each lever 128, comprisee an upper portion 130 extending above the pivot 129, and a lower portion'131 connected thereto by a bail, said bails formink'g'a nest such that the outside bailconhiacts the upper left-hand lever 130 withthe ld wer right-hand lever 131. The

next innerbhil connects the adjoining upper lever to tht adjoining lower lever -and so .on; the central'lever .128 having no bail because the upper and lower parts of said lever form a straight line. The lower ends 131 of the levers abut against the rear ends of the pin bals 28, with the-result that when the upper end of any lever 12 8 is forced rearwardly by the typewriter carriage, the lower end'of that lever will shift its pin bar 28 from the position seen in Figs. 1 and where the pins- 27 are out of range of the pin-setting linkages 26, to the position seen in Fig. 24, where the link operated by the numeral key 1 is setting the corresponding pin.

The pin bars 28 are guided and supported in a comb 123 and their lugs 48 prevent them from having excessive forward movement by.-abutting against the cross-bar 29 of the general operator. Each index pin bar 28 is provided witha return 'means in of the cross frame supporting the pin'setr ting linkages; each pawl having a return spring 145 which causes thepawl to bear against a shoulder 146 on the bar 28, said' shoulder inclining to the rear and formed to'permit the pawl 143 to rotate idly upon the top edge of the rear portion of its bar 28, during the driving forward movement of the latter; these awls 143 serving, however, to return the ars 28 promptly from the position seen at Fig. 24 to the normal Fig. 1 position.

In addition to the key 61 whereby the bar 62 may be set for subtraction, means are also provided whereby the machine will automatically subtract in certain computirag zones or columns, and. again return to a dition after it has passed each subtraction zone or column. To bring about this same distance as the lower ends of sail levers 128. This subtraction-setting lever 151, to control the subtraction setting, is joined by 'link 152 and a rock arm 153 to a rock shaft 154, said shaft carrying fast r thereon a dog 155 which controls the sub: traction setting. Whenever the subtraction dog 150 cams the lever 151 rearwardly, it lifts the dog 155 out of the notch 156 by which it normally. holds the slide 155 connected to the subtraction bar 62, thereby permitting said slide to be drawn rearwardly by a spring 157, with the result that said slide draws the subtraction bar 62 to effective position by means of a pin-andslot connection at 158, said connection adapted to allow the subtraction bar 62 to be set independently of the dog 155. When the subtraction bar is set by the dog 150 it is elfeetive on the computing mechanism in the same way as when set manually.

-lVith the operation of the general operator, said subtraction bar is restored pre cisely as if subtraction had been manually set. It is to be noted at this point that the spring 157 is much stronger than the spring which returns the subtraction In order to re-tension the spring 157 and prevent its interference with the spring 1.15 In returning the mechanism: to its adding position, the crossbar 29 of the general oper ator, just before the end of its forward movement-,catches a lug 159 fast on the slide 155 and draws said slide forwardito position where the dog .155 will be drawn by a spring 1 160 into the notch 156 by which the dog 155 usually holds said slide, and so reset the automatic subtraction device to itsnormal position. The spring 160, it will be noted, both normally draws the dog 155 to effective posi- 5 'tion against the slide 155*, and also holds the subtraction lever 151 in position where it will be struck by the subtraction .dog 150 in the letter-feeding movement 01".the cart will be noted that said subtraction dog 150 is identical with the dogs 12%, except that said dog has a broader cam face 161, so that the lower end. of said cam face cooperates "with a cam-faced lug 162 on thelever 1.51, said lug being placed below the lugs on the levers 128, with the result that said lug stands clear of theordinary dogs 124. In order that said dogs may not interfere with the return of he typewriter carriage, they are provided with swinging mrmihers 163 of which the cam :l'aces form a part, and said swinging members are norma ly held in ct fective position by Springs 163 which pei mit the swinging members to be sw ung: to in effective position by the cams on the levers 128 and-ltihduring the return movement 01': the typewriter carriage.

For the purpose of correcting errors, the machine is provided with an error key 164; {Wwhi'chis adapted to erase any number set up n the pin bars 28 by restoring the pins set ug to normal position. For this purpose, -"sa1-f;.key, when depressed, carries down, by neans of apinlfifi, the forward end of a 86*{l'even166 which is pivoted at 167, so that i the rear end 168 thereof will strike a ing- 169 projecting from'one of the bell cranks 109 .'n such a way as to raise the pin-restoring late 108x00 restoring position, thus unset- "40 ting every set pin.

If the general operator is not actuated, thisaction will not, however, disturb the an tomatically-acting subtraction-setting mechanism. On the other hand, if the machine ,45 has been set for subtraction by hand, that "is, by the rearward thrusting of the subtracl tion'key 62 the depressionof the zero key to correct an error will restore the machine.

, to' an adding condition. It will be remembered that the subtraction key rod. 62, when pressed rearwardlmis caught by the latch 105 engagingj-inthenotch 107. Now, inasnru'clige'us"the error key 164 actuates thepirr H restoring i late-1'08, the arm 113 connected ttherto wi lQbe rockedatthis time; The arm 7 IYK-WiII-QngagethG heel 114 on the latch 105, t .311 1w l be free to. restore the subtractionent re key but 2 a d the p @Pemted eb'y I to {their normal dormant lpositions. It ewidciiit then that theerror .key, while it-fwill not: restore the computing mechanism lto im adding conditionwhen actuated after "an eutomatic subtr' omen-sett ng, will reerebyi'releasmg the same, so that the-spring piece for restoring said .computinfg condition if the same has been set for subtraction i'nanually.

In caseof manual setting for subtraction instead of an automatic setting, the sub-.

traction setting mechanism can still. be held. in its actuated position by the special bolt or look 117, so that a restoration from subtraction will not be made at the actuation of the error key even though the latter, through its train of connection, releases the latch 105.

Variations may be resorted to within the scope of the in ention, and portions of the improvements'n'iay be used without'others.

Having thus described my", invention -d: claim: y l. The combination Wheels, of a series of rack bars for driving dial wheel's, a traveling carriage, a tappet carried by" said carriage, a se ries of levers mounted on a fixed pivot ar ranged to be cammed. rearwardly by said tap iiet, to force forwardly by direct engagement, said rack bars to eifect'de- 'nominatioual selections, and subtractionseo ting mechanism including a trip and a lever for operating; said trip, mounted on the same fixed pivot as said denomiriation-selecting levers, and operable from said carriage by a tappet cairied by said carriage.

2. The combination with computingmech' anism, of subtractionsetting mechanism for said computing meel'ianism, indexing mechanism, errorco'rrectlng, mechanism for said lndexing mechanism, (lLtVlOBS, operated 'by,

said error-correcting mechanism to cause said SllblZIQOtIOIl-Sfilltlllg mcchanlsrn to -be restored from set to unset position; and means for preventing at times the'restome tion of said subtractionsetting mechanism when the error-correcting mechanism is op' erated, so that said computing mechanism may remain in subtraction condition after actuation of the error-correcting mechanism.

The combination with computing mechanism, .of subtraction setting mechanism fir said computing mechanism, a general ope tor for said computing mechanism, errorcorrecting mechanism connected to cause restoration from a subtraction setting by said subtraction setting mechanism, and means with series of dialoperated by. the general operator, forcontrolling the action of the error-correctingmechanism on the restoring mechanism for .the

subtraction setting mechanism. F

4. The combination with computing-mach:

anism, of subtraction setting mechamsmkfor ing mestnsior said subtraction settin said computing mechanism, manual-opeuatmen anism, automat c operating means:v or said.

subtraction settingmechamsm, and a fin rp d 111 a. nism froina subtraction sett ng, so

tuetion'ofone oi said means.

ely-when the; latter has been'brought into play by-air; u

to'normal unset ,been brought into play, i the action'of said spring, error-correcting said computing mechanism,

5. The combinatiorrw th computing mechanism, of subtraction setting mechanism for manual operat mg means for said subtraction setting mechanism, automatic operating means for said subtraction setting mechanism, a finger piece for restoring said computing mechanism from a subtraction setting, solely When the latter has been brought into play by actuation of one of said means, and a general op erator connected to restore from a subtraction setting, when said subtraction setting mechanism has been brought into play by the other of said means.

6; The combination with indexing devices, of subtraction setting mechanismior said indexing devices, a spring tending to restore "said subtraction setting mechanism to normal unset position after having once been brought into play, a lock preventing the action of said spring, error-correcting mechanism for said indexing devices connected to release said 100]: to permit the action of said spring, and a secondary lock preventin an action of said spring even when said firstmentionedlock is released by an actuation of said error-correctingmechanism. i

7. The combination with indexing devices, of subtraction setting mechanism for said indexing devices, 'a spring tending to restore said subtraction setting mechanism position after having once a lockpreventing mechanism for said indexing devices connected to release SBJd lock to permit the action of said springgand a second spring stronger than said first-mentioned spring capable of bringing said subtraction set ting mechanism into play, and overcoming the restoring tendency of said first-mentioned spring to restore said subtraction setting mechanism even When said lock is released by said error-correcting mechanism.

8. In a combined typewriting and computing machine, the combination with type- Writer numeral keys and a traveling carriage, of a series of computing Wheels, a de nomination-selector carried by said carriage for selecting said Wheels, a general operator for simultaneously carrying into all said wheels the digits written by said keys in a computing zone, devices on Whichnumbers are temporarily set up by said keys to per-- mit the digits to be so can? means for erasing the set-up number, SllbtlzlCiiOI1-S-tting means for causing the set-up number to be carried in said Wheels subtractively, a dc vice automatically made effective by the carriage on entering said zone, for making the subtraction-setting means effective, the connections being such that the subtraction-setting remains effective until the'operation of said general operator, a manual subtractionsettingdev-ice, and connections whereby the erasing means is effective to both erase a number and erase the manual subtractionsetting, but is inefiective on the automatic subtraction-setting.

HANS HANSON. Witnesses W. 0., Wnsrrrmn, J ULros DUoKsTINn

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