US856236A - Adding and subtracting machine. - Google Patents

Description

"4N9. 856,236. PATEENTBD mm 11,1907;

. J. a. EPBNETER.

ADDING AND SUBTRAGTING ma ma APILIOATION FILED JULY 14, 1906.

Y is b No. 856,236. PATENTED JUNE ll, 1907 J. U. BPBKETERQ ADDING AND SUBTRAGTING MACHINE.

APPLIUATION mm) JUL-In, 190e, H

- a Quark-sum z No. 856,236 PATENTED JUNE 11, 1901' I J. c. EPBNETER.

ADDING AND SUBTRAGTING MACHINE.

APPLIOATION FILED JULY 14. 1906.

ND. 856.236; PATD NT DDD JUNE 11, 1907.. I J. 0. BPBNBTBR. I

ADDING AND SUBTRACT-ING momma.

a sums-sum 4.

APPLICATION FRED JULY 14, 1906.

I Qfnesses:

PATENTED JUNE 11, 1907 I J. C. EPBNETER. ADDING AND SUBTRAGTING MACHINE.

APPLIOATION FILED JULY1&,1906.

8 SHEETS-SHEET 5.

wz mfi I 74% v j fw 172602".-

- G, EPBNETER. ADDING AND SUBTRACTING MACHINE,

ICNP

ILED JULY 14, 1906.

APPLIGAT 8 SHEET3-SHEI1T 6 %/5i/5 cz my PATENTED JUNE 11, 1907.

J. G. EPENBTER. v

ING MAGHINE.'

LYN, 1906.

ADDING AND SUBTRAGT APPLICATION FILED JU PATENTED JUNE l1, 190? 8 SHEETS-SHEET 7 lgcrosaysea.

No. 856,236. PATENTED JUNEII, 1907 J. 0. EPENETER.

ADDING AND'SUBTRAOTING MAGHINE, APPLICATION FILED JULYl l, 1906.

a SHEETS*SHEBT a JOHN, (J. EPENETER, or DENVER, cononano.

- ADDING AND SUBTRACTING MACHINE.

' To all] whom it 'IIMJ/ concern:

- Be it known that I, Jon): C. Ernnn'rnn, a

citizen of the United States of America, re-

siding atthe citv and county of Denver and State of Colorado, have invented a new and useful Adding and Subtracting Machine, of which the following is a specification.

My invention relates to improvements in adding and subtracting machines.

. The object of this invention is to provide improved mechanism for lOOlilHg the de-? pressed numeral keys, and which will at the same time prevent the depression of other keys in the same row in which a key has been is depressed, the pressure of thesaid key unlocking a spring-actuated rack, which when the operating handle is pulled, will reeede a number of intervals or steps, corresponding to the number on the depressed key; the sair racks carrying pivoted type bars, which are tripped by suitable mechanism as-ihe racks rccede, causing the said bars to strike a recording sheet and record the number of the key depressed, while at the same time the .25 racks which have receded turn a corresponding numberof accumulating wheels a nu mber of teeth corresponding tothe number of I the depressed key.

A further object of the invention is to pro- 0 vide i'nterchangeable adding and snbstraet- -ing mechanisms, which are operated by the same accumulating wheels, one set being in operative relation to the wheels, while the othe set is inoperative, and means for caus "ingt e. racks to engage the-wheels, on their rearward movement, when adding, and on their forward movement, when subtracting, the said addin and subtracting mechanisms being arrange to advance the tens wheel one 46 .step, when the units wheel has been moved ten steps, the hundreds wheel one step when the tens wheel has been moved ten ste s, and so on to the last wheel; the invention 'rther contemplating the employment of improved -means or slnfting the type-ribbon at right angles to the axis of the platenroll, and for record sheet, and one' of the ribbon spools,

each a; predetermined distance, said move 5o ments being accomplished at each movement of the operating'lever.

. The invention further consists in numerone 'minor details of construction, of which'arafully set forth in the accompanying specification and claims. g g

at eenies wing Fi ure ,1;

Patented June 11,1907.

i is a side elevation o my improved machine,

multaneously turning the said roll, with its of my invention.

the casing thereof being in section. Fig. 2, is a central, vertical, longitudinal sectional VlL-W of the same. Fig. 3, is a plan view of the machine, the casing being in section. Fig. 4, is a vertical, transverse, sectional view on the line iof Fig. '1. Fig. 5, is a detail perspective view, illustrating the type keys, the locking plates, the locklate latches, and mechanism for operating t 1cm. Fig. 6, is a rear view of the machine, the easing being-in section. Fig. 7, isla view of a row of keys from 1 to 9, arranged in the order in whichthey operate in the machine, but turnertwith their front sides outward, in order to show the construction of tiei r lower ends. Fi 8 is a ers )ective view of one of the key-locking plates, in a reverse position to those shown in the other views, for the purpose ofelearer illustration." Fig. 9, is a perspective View of" one of the sliding racks, carrying one of the pivot-ed type bars, and

showing the stepped arrangement ofone of.

its members, by which it engages hnd 1S stopped by the lower ends of the keys. 10, is a perspective. view of one of the rack levers, whiclnsuppo,'tthe adding andztsubr tracting mechanism, and other parts." Fi 11, is a perspective view of one of the piill levers, which eil'ect the lifting of the accumulating gears out of engagement with the sliding racks. the subtracting mechanism. which is operated by the accumulating wheelsftlie adding mechanism being similar, but arranged to be operated from the other sides of the wheels;

Fig. 13, is a perspective view of one of the slidin'e bars with its trip lever, latch, t and pawl lever, detached from the adding mechanism. Fig. 14, is a perspective view of the latch shown in the above view. view showing the mechanism for turning the platen roll and shifting theribbon. And Fig. 16, is a plan view of a portion of t hecas ing of the machine, showing the mechanism for moving the ribbon atrightangles to the axis of the platen roll.

Similar letters of reference referto' similar. parts throughout the several jwiews.

Referring to the drawings. the numeral 1 Fig.

Fig. 12, is a perspective view of Fig. 15, i sa in general, designates the; supporting casing- The strai" tjop is provided with anopening 7 centrgiiyibove which I iavolubly moant This casing consists ofthe floor 2, the front-end 3,- the rearrad 4,1and [the sloping top 5, and the" straight top--6.

, 50 are stepped asfshown at 19 B,. nine of these from one'to-hinei The lower ends in bearings 8, a platen roller,9, the lower side site ends of which-are'secured to a pin 24,

of which projects into the opening 7, and bewhich is also supported inthe brackets 21A.

low the under side of this roller axially with ,The horizontal portions of the arms 20, are its'.-length and close to it, I support a typeprovided with recesses in their. un'dersides,

.5 writing ribbon 7A, referably a two color which are engaged by the. ends offingers 25, ribbon, from two ri hon-holding spools 10 that project from'the upright members of the andillfi which are rotatably mounted in sliding racks. Across the/casing in front of brackets depending from the top of the casthe sliding rack, I mount-in slots formed in ing in position. to feed the ribbon to and un-. the casing a cross-'bar'28, which is normally 1o ,der the roller. The ribbon spools are operheld against the sliding'racksby sfinrings2fi, ated in the same manner as in the .ordinary as will be presently explained. *-'I' 's' cros'stype writingmachine, the spool shafts being bar '28, is secured. to a pail-of 81138129, the provided with bevel gears-10A, which are opposite-endsiof which-are slotted as shown operated by similar gearslOB on a shaft at 30, and are connected to a air-of actuat- 1 5 C, which may be' shifted so, that one of its .ing levers 31, by pins 32, whic pass through gears IOBEInai;1 engage one of the ribbon the slots 30A. ;.lo 'the cross bar 28,- is sespool gears, w 'le its opposite gear 10B is cured a number of sparing dogs-27, correout of engagement with t e adjacent ribbon spending to the num r of type" barsjthe s 001- gear, as will be understood. This free endsof which are formed wlth upwardly 2.0 s idingshaft 100 also carries a broadYaced extending hooks,iand these hooked ends exratchet wheel 10D, which is engaged. by tend between the racks and-normally contaci mechanism to be hereinafter describe to e withthe underfedgesof-the arms 20,- in osi feet the rotation of the said shaft, and 9. tion to 'engag ethe ends'12A ofthe type ars paper roll 9A, is supported in standards rear when the arms are lifted by the fingers I: 5 of the platen roll, in position to allow the the ose of which will be fully'explainm e a i paper to be passed betweenthe ribbon and her I e V p platen roll.

- l 4 The rock arms 31 ;s tandin avertically-dis Below the roller and its ribbon, I arran e a posed position and their lower ends-are se Y plurality of t e bars '12, seen bein il us cured upon the o positeends of a'shaftfia '0 trated, thoug afreater number may e emwhichis journale m 34, t

ploy'ed if desire and these type ars are the bottom and sidesnofthe "Thi pivotally connected to upward extensions of shaft 33 extends beyondl.the' casi'n" onth asimilar number of sliding racks 16, one of right hand side; and uponthisexften ed end which'is shown inFig. 9. The topedge of secure ahandoperatin'g l'ever 35r s1lgdf 5 each-type bar, is provided with. a raised whioh'isnsed to'inipart apredctrmiil ffoi tongue of metal 13', which engages one end of ward movement tothe leveisenwhicn n a spring 14,-the o posite endiif-which is conduces a corresponding" movement of th nected to the sli mg rack 16,- towhich the cross bar, permitting the racks tolrecede an said typgbail is pivotally attached, and this the dogs 27, to engag'ethe type bars',.as',willl ars 12, are pivotall y secured neif r their the lever 35, is o erated however, it is new forward ends by pins 18, to theslidingracks sary to release the sliding racks 16-, as th 16, which racks comprise" vertical members -are held normally locked, and I will now d 1 17, which extend from the bottom of the CBS". scribe the mechanism 'by whichthey are he 4-5 ing to the top thereof, the lower ends of normally locked and also.the mechanism l which terminate in rearwardly extending which they are released. 1

. portions 18A, upon the top edges of which The number'keys 15, are arrangedinsew gear teeth 19, are formed, and forwardly ex parallel rows lengthwise-of themachine, a1

' tending arm's 19A, the upper edges ofwhich each row of keys is numbered .regpective o, spring is fulcrumed at 17A, asshown: The more fully explained hereinafter. Befo1 t pe the ke .steps being em l'oyed to form'a corresponde are all on the seine horizontal plane, but ea I ing number 0 shoulders, the purpose of row or tier of keys from right to left is long which will resently appear. The forward than the row immediately preceding it, t end of eac type-bar, is provided with a length of each'preceding tier of keys bei 5 5 downwardly extending hook portion 12A, determined by the incline .Of the 'top' of t which are adj aoent tothe ends of rock arms 'casing. Thus the'tiers extend one abovet 20, which are positioned to stand horizonother in step by step order, and,they are st tally, said rock arms beingpivotallymoirrrtported-in operative position by the top oft ed on a shaft 21., the op osite ends of whh casing, andby a depending-plate 34, the c 6: are A ivotally mounte v in brackets 21 ing and plate being provided with sl whic are secured to thegtop of the casing and through which the keys pass; These k1 depend therefrom, The arms 20 are in'the extend. vertically down through the slots form of hell cranks, and their depending the casing and plate, and terminate 11 members have apertures 22, in which are semally at ashort distance above locking cured the cnds'of coiled sprigrgs 23, the oppor vices 36, which 1 termlock plates. Th

in line withptheir outer edges. end of each'key' stem is reduced inwidth to:

I i 856,236 'B 108k plates 36, are substantially L-shaped in cross section, and are hin ed bytrunnions to" the casing at one end, and to a bracket 36 at their oppositqend. These lock plates stand with their lower limbs normally in a horizontal lane,-and thelower ends of the keys norma y stand a short distance above them, and The lower form a shoulder szjand theseshouldersare on the same plane as the upper ends of the lock'plates, and adjacent to them. The key stems preferably com rise narrow rods, and

at the ower end of eac stem on the-opposite side from the shoulder 37, a lateral stop lug 38, is formed. These stops in each row of keys from l'to 9, are arranged relatively to vthe steps 1913 on the arms 19A of the racks 16, the stops of the first tier of keys. or those re resenting the numeral 1, being in position w forward end ofi lthc arms 19A, so as to permit them to move forward only one interval,

while the stops of each succeeding tier of.

keys when depressed will be in position to stop ,the'rack at the stop 01 interval corresp'ondin to the number of the depressed key. A h'ove the shoulders 37, and on the same side of the key stem, notches 89 are formed, and the vertical limb of the lockplate is formed with a right-angled hook edge 40, which is "adapted to fit loosely in the notches 39 of eachkey-stem, when a key is depressed, the notchesbeing so positionedstems of that row,'that when the hook oi the 1 look plate is thrown forward it moves under the shoulders 37 of all of the other keys in that row---and---ilocks.*tliem' against. being pressed down. A spring 41', connected to the forward end of each lock plate, .and to the casing and thesewsprin gs normally hold the lock p ate inf the position shown in Figs. 4 and 5, theendsof the lock plates engaging stops 42, which define the upward movement of the said lates 'V en'a lock plate is tilted down by depressing a keyjit is locked in that position by y a latch 43,-cine being employed for each plate,

and these latches are pivot-ally mounted on a 1 shaft'atgwhich' is sup cried in the opposite sides of thecasing.

he lower ends of the latches he in recesses 45, formed. in the forwardends of the lock-plates, :is'shown in :Fig'. 5, and these ends hawmilw lu-H' 'HL which en the keys are depressed, to receive the the 'casihga normally stand on a sli htly lower plane than the adjacent edges'of t 10 recesses 45, so that .when the'plates are depressed or tilted, they will be engaged by the notches-46, and held until" the latches are moved to release them, as will be further explained. The-upper ends of the latches are formed" with rearwardly extending projections, to which contraction springs 47 are attachedrear-of'the pivot rod 44, the opposite ends of which are secured to the casing. These springs exert a pull on the latches and cause their notches to engage the lock plate. as previously described.

U on the projections at the upper ends of the atehes rests a rod 48, the opposite ends of which are secured to the forward ends of a pair of arms 49, the opposite ends of which are pivotallysecurerl to a rod 50, theends of which. are] mounted in the opposite sides of- The arms 49 havevertical extensions. 51 the upper ends of which are in the form of a T, and each T lies in the path of a pair of sliding bars 52 and53, which are operated by the vertical levers 31, as will be explained fully hereinafter. The inner bars 52, of each pair, I term "pull bars, andthe outer, bars of eachpair term push bars,

These bars are of the form shown in Fig. 11,

and extend to the rear end of the machine, the rear ends of the bars being slotted, as

shown at 54, toengage circumferentialguide grooves in ins 55, secured to the sides of the casing, and which support the rear ends of the bars. their full distance, their ends come in contact with the T- arms 51, pushing them forward a short distance and moving rod148 downward.

on the extensions of latches 43, which tilts them, and unlocks the lock plates 36, aswill be more fully explained hereinafter.

As the bars are pulled forward- 1 will now describe the mechanism that cooperates with the keys 15 to release the slidlng bars, so that when the hand operatinglever 35, is drawn toward-the operator, the type bars and their cooperating mechanism wil be put-into operatiye printing relation to print on the pa ernfthelpaperfeeding roll: The keys are all h erative positions relative to each other, b springs 56, their being onespring for eac IIC- eld in theirrespective op- Z key stems The forwardly extending ends 19A, of, the sliding racks 16, extend to within a short distance of the first tierof key-stems, or those bearing the number 1-, which-dis- 'tance is equal to the interval between any two of the type faceson the type;' bars 12, which are pivoted to the racks or'gbetween two of the teeth on the said rack. ,In the .ends of the 'iorwardextensions 19A, of the slidin racks, I form slots 57, which extend into t e ends parallel with their length; a distance equal to the whole distance traveled by a rapk, .'whcn a 9 key is depressed. :"The l op ed gcs of the forw'ari'lly extending bars 19A,

. stems of .sliding'rack, are provided with nine verticaliace ste portions, as above described, and the forwar ends of-these extensions are one interval or toothfdistant from theends .5 bffirstliet of-kefs' 'or those bearing the 7 minibrlJ- Trhesesteps are arranged in the tulle-wing order 'lhe first'vertical faces of the- MfSte s are.- 'sitioned relatively, to the terrnin" ends thefsec'ond'tier of keys a dis- "spar-ram arts the travel of two teeth; or twothe travel ofsth'e racks; .;the

I .I- second steps are pla'ced from the ends of' the i full'movement of the racks, and the vertical facesoi the third-steps are laced from the thilid tien-ofgkeys a; distance equal to the travel of "three. teeth, or three-niuths of the :ends of-ithefourthj tier of 'eys a distance equal to the I-travel of four teeth, or fourninths of the full travel 'of the racks and so on so to the ninth keystem. .Thus when a number nine key is pressed, the slidingrack 16 must movethe-type-bars far enough forward tobring the typenumeral ni'ne on the typeb'ar's 1inder';the ribbon, and. platen r01 er I The-stop lugs 38,011 the lowerends of the keys-are placed in the path of thestep correspending to the number of the keydepressed,

I so that when any key-is depressed the sliding rack and the ty 'e-bar connected with that .30 rack aremovcd orward far enough tobring the correspondin type numeral of the ty ebar under the in ribbon and platen rol er,-

. and this is accomplished by springs 58, which plate, and which 'engage the terminalend of he-Extensions 19A,of the sliding-racks just s ment by the'cross bar 28, until the-hand 0pare connectedat their ends to the racks and 35 to ashaft 59, that extends across the casing:

and is su ported. in the sides thereof. Grooved ro lers 60,.are mounted on this shaft I for the extensions 19A to rest and slide on, and the springs 58 hold the sliding-racks e under -a eonsta'nt forward pulling tension.

They are all held back in normal inoperative osition however, by lugs 61, which are ormed on the horizontal edge of each lock above the slots 57 (see Fig. 4): When any onekey-stcm' is depressed, and the lock-plate is tilted, this lug is moved downinto the entrance of-th'e slot 57 and the sliding rack is released, but isheld against forward movecrating. lever- 35', is drawn forward, which permits the spring 58,- to draw the rack forward until'stopp'ed 'by the depressed key,

when a further movement ofthe lever 35,.

and of the cross bar, will trip the type-bar and rint the Tnumeral corresponding to The ke 'i epressed, in the manner and by ncch "L anism to be'now fully described;

60 The ,type keys are numbered from 1 to 9,;

butthe type-bars are nrimbcrcdfmm 0 to $1,

IIfally' below the ribbon. The type bars are and the line of zeros or naughts stand nor- 1 F held"in their normal position by their springs 14;. When one or more of the lrcysarc 'ih M ii;

pressed, in adding, the correspondin loch plates are tilted-the corresponding rac s-are unlocked, and the operating handle is moved forward'to impart a-simila'r movement to the cross bar 28, which permits -the ,unlocked 58, until stopped' bykthe "depressed keys;

But as the racks start forward,'their fingers lift them, and allow-the spring dogs 27, to exi e movement 'of'the crossbar will -cause.the spring dogs 27 ,to pull upon and tilt'the type bars, when the dogs will escape, thus tripping the type bars, which will be ,throw'mifu se'nted 'by the depress (1 keys. -...The two springs 26, which return-the crossfbargiand ing tension, considerably greater than-the combined tensionsi'of the seven springs 58,

racks maybe instantaneousl returned to 20, beginning with the one-on the unitsside of the machine, is provided with a lip 20A,

cent armto the left; thus, should anyone of the arms be lifted, all the'arms to the right'of desired to print-9000, thenine key in the other racks remainlockedg" .-.1h'e ioperatin'g handle is then moved forward, and 'the unlocked rack movesforward also,-its finger- 2 5,

lifts the one to the rightof it,'a1id"so.on to the last arm, thus permitting :the spring dogs $27, to engage the ends 12A=of=the t -bars,- and as the "racks-"are locked, v the type bars tothe diatfely after the crossbar starts forward; and

slots, when the cross, bar begins itsmoveback to its normal position, by its springs 26, when the operatipg handle is retleased, im-

their normal position, after-a1 the-type bars. have been tripped and thenuin bers'printed. "In order to'print the naught, cachrock arm racks to be drawn forward by theirsprings .25, which lie beneath the rack arms 20, will gage the ends 12A of thetype bars, until'the'f racks are stopped by the keys; when a further" against the platen roll by. their springsy .w'it i sufiicient force'to printihe'nunierals'i'epre simultaneously the raeks,.-must, exert a-1 pull which operate the racks; in orderthatsthe i which extends over "and-rests upon. theiadjait would be lifted also: For example: .if it is IOC thousands row is depressed, and the-rackin 1 that row is thereby unlocked, "while all-the lifting the rack mm above it,--w hi ch in turn rightof thousainls bar willbe tripped immeprint the-three naughtssimultaneously,while V and 29,'-are thus at the. outer endsof the ment, and as the cross baris thrown quickly pact upon the raclrs would also; throw the arms 31 stillfartherforward the distance of the'length of the-slots in the arms 29', and the arms would rebound to the opposite end of the, slot again, and in'order to prevent. this, and to keep .the arms at the, limit of their rearward movement, I connect the arms 31 and cross bar 28, by springs 31A, which, when the opera-ting handle is released, Wlll immediately draw the arms 31 to the rear ends of the slots 30, and keep them there after the cross bar strikes the racks.

I will now describe the adding and subtracting mechanism. Adjacent to -the sides of the casing, I pla'cea pair of levers 62, see Fig. 2 both of which are provided at their rear ends with depending extensions 63 and 64, the latter resting on the floor of the casing. The forward ends of these two levers are curved do'wnwardslight-ly and are pivot-- ally mounted on the shaft 59. Througlrthe rear ends of' these levers centrally between their depending extensions, I form in each a .jOIllUitl aperture in which I mount a shaft 65,

' on which is rotata-bly mounted seven gears 66, one for e'ach of the seven toothed racks,

, and I position them on the shaft so that each gearis in mesh with its adjacent toothed rack.

I provide each gear with ahub that projects from opposite sides of it, ofia'length sufficient;-

to permit each hub-to bear against the hub of the adjacent gear, and the hubs of the end gears extend to and bear against the sides of the levers 62. The z ear's'are thus all held in alinement with the racks, while'the racks are, held in operative positionby 'the rollersfiO;

which are mount'edon the shaft 59,and"by rollers 67, which aremountedv on af rod 186* i.

' path of the pins of eaclrgear; and are each pivotally connected to one of a group of seven vertically sliding bars 70,-which are housed in a cage comprising side bars 71,

and end plates 72. See Fig. 1.2. .There are two ,ofthese cages 73 and 74, one on each edge o'l'heacl'i g aar, and they are similar in con structi'on and have similar levers. The cage 73 houses the adding. mechanism and the cage 74 houses the subtracting mechanism."

The top or upper ends of these end plates of both cages are provided with pins 75, which extend over the upper edges of the levers 62, toreceive connecting rods, as will be shown later. These two cages and their groups of levers are positioned on opposite sides of the groupvof gear wheels, and directly over the toothed racks; and are arranged and adapted to be interchangeably operated by said gear wheels, depending on whether sums are to be added or subtracted, to carry the numeral above nine from one gear to the other. The end plates 72 of both of these cages, are pivo'tally secured attheir lower ends to-the lower ends of the depending extensions 63 and 64 of the levers 62,

The pins 75 of'the end plates o'f both cages,

are connectc to the opposite ends of con- 4 neoting-rods 76, which connect the cages together.. To one of these connecting rods I pivotally connect one end of a rod 7-7, the op-.

.posite end of which extends forwardly in thepath of-a rock arm 78, which is secured to a shaft 79, that is pivotally-mounted in the oppositesides of the casing, To this shaft is rigidly secured-seven riglhtangle levers 80, which are all depressed y a single key 81,

which may be secured to one of the lovers 80 or to a senaratelevcr 82. as shownin Fig. 3; 1 term this key the total ke The free ends of these sevenright angle evers depend toward and are adapted to engage the lock plates'36, and unloc'liall of the't will be explained hereinafter; T as red 77 is .90 e keys, I

pivotally connected intermediate of its'ends to a rock arm 83', which is mounted onja roil 84, which extends across the casing, and is pivotally j ournaled in its sides; On the opposite end of the shaft 84, I secure a rock arm 85, which is similar to the tools arm 83, and these rock arms are eac of horizontally disposedfingers, which are adapted -to-bear against the under sides'of the two pairs of levers 52, 53, which" 1' term push j and pull levers, one lever'in' each pair being a f'push lever,.wh ile the remaining lever in'each pair is a u'll Ievertand the arms 83-and 85,

provided was: a pair are tilted ysprings 84A in the position'shown in Fig. 1, to allow the'pull levers 52,,to normally engage the pins 87 tOthe rocbarms 31. These two pairs of levers are positioned on, opposite sides of the casing, and the-rock arm 31 on one side of the casing passes up between the two levers an that side, while the rock'arm on the opposite side of the casing passes 11 between the levers'jon thatside.

A Each ever 52,?53, isxre'cessedon its under edge, as shown lit-86', and each arm'31, is'provided with a pin87; which pr'o'jec'ts from each side of it, and these pins engageltherecesses 86 of the levers 52,53, to pull one'p'air orpush' the other pair, according as they are raised or lowered by the rock arm 83, mass either to beengagcd by the pins 87, orto be out of engagement with. them. The: pins 87 of the arms 31-, are formed with upward projections' which prevent the rods-J52, 53,"trom slip ing- 0? the .pull levers 52, I ivotallvsecur'an arm 98,

off the said pins. 'On one side-of each and these arms term lifting'arnis; These lifting arms are pivoted at theirlower end to the lower edges of the levers, and project up and forward at angle of abbut de ees, to theshaft ;whieh carries the earw eels 156. 'lhearms 98 are held norma lly against stop pins 99, by springs (seefFig. 11),

attheir lower ends and are caused to incline toward the rear end of the casing by springs 102. The upper ends of thearrns98 and 101',' are cut ofl so as toibe parallel with and on the same'planerwith the top ed es of the levers 52,53, and upon these ends 0 the lifting arms arepivotally secured spring-actuated latches 98A, and 101A,

junction With the'ends of the lifting arms, to en ga 'e the shait 65, and lift the'gea'r wheels out 0 en agement with the racks. The'dogs on the hazing arms-of the pl ll'levers, have a forward movement, being held against the Opposite movementbya stop 98B,whicli .en-

gagesthe front edgeJof the-said lifting armn him, when the lever is pulled .forward, the

. end of the arm andidog will engage the shaft 65, and liftit, so as to disengage the gear Lwheels from the racks, but w enthe lever returns, the dog will be depressed, and the end of the lifting arm will pass beneath the shaft 65, ,which escaped the lifting arm,- and drop ed into its normal p'osition when the plil evers reached the limit of'their forward movement.

The dogs-101A on the lifting arms of the u'shlevers, move 'in the opposite direction rornthe dogs 98A, and their stops 101B enage the rear edges of the arms. Thus, when the-push levers are moved forward, they are inoperative and the dogs on' their lifting the shaft swing upward as the pull levers arms pass under, and then ergage-the shaft .65, so that when the push levers move rearward the shaft is raised, as in the previous manner. The arms as soon as they. engage move forward, until they pass their vertical centers, and as the pull levers still continue forward, the shaft drops down, thusletting the gears'down again into meshwith the toothed rack, which occurs the instant the operating handle 35 reaches the end of its stroke, and the. arms 98 as soon as they escape the shaft are drawn'forward by the contraction sprin s 101, which are secured-to them to t e levers.

- In prder tojdefine the operative position of g the arms 98, I place stop pins 99 in the levers against which the arms arenormally held by the, contractive tension of thespriugs 101,

an the push levers are provided with stop pins 1010, which limit the rearward-movement'-o'f arms 101, though'as shown in Fig. 1, these armsrest against the guide pins '55, until the arms move some distance forward. As the push levers must be inoperative, or out of eng ement with the pins-87 of the rock arms 31,'w en the pull levers are operative or-in engagementhwith theaforesaid pins,

respectively, which act in coni i f and v ce versa, means must be employed for connecting one set and disconnecting the manner:

rot I pivotal y secure one end of a lever 103,

which I term a subtracting lever; this lever cure one'en'd of a lever 105, the opposite end ofwhich "I connect to the connecting rod 7 6 ca eshave two of these. levers, one on each this subtracting lever stands at the forward is contained in the cage 7 3 is in engagement with the gear wheels 66, but when this subtracting lever is manually moved ,to the opposite end of the slot it moves the two cages 73 and. 74, toward the forward end of the casing, puttin theadding mechanism, which is housed in t e cage 73, out of engagement mechanism which ishoused in the cage 74, into engagementwith the gear wheels, and this forward-movement of the cages is imparted to the' rod'77, which being attached :to-t-he rock-arm; .83 moves it and the corresponding armr85, lifting the pull levers52 oil the pins 87 of the arms 31, and allowing the push levers to drop d'o'wn on the said pins. The forward end of the rod 77 is now adjacent to the lowere'nd of the depending arm 78, and acts as a stop to prevent the total key 81 from beingpressed down, and conse uently to prevent a total being taken while the subtractingleverand the subtracting mechanism is-in operative engagement with the ear wheels, The upper endof the depen ing arm 78, is rigidly eonnected to the shaft 79 and adjacent to this arm, and uponthe said shaft '7 9, is rigidly secured an upwardly ex tending arm I06, the free end of which is piv'otally connected to one end of a lever 107,

'83, and its adjacent end extends beyond this pivotal connection with the rock arm, and is pivotally connected to one end of a lever 10R. the opposite end of which is pivotally connect ed to a'rod 109', which is supported by t-lnouter ends of 'two'cranks 110, which are secured on a rod 111,.thatextends across the casingand is secured in its sides' These two rods 109 and 111, are positioned directly above the sliding'bars 70, 9f the adding .mechanism, and the rod 111 is engaged by these sliding bars 70'; on the upward movcment'of theadding cage 73', at the rear end of on the ends of the cages; consequentlythe si e} though the right hand-lever103, only, extends through the top of thecasing'. VVhe-n end of the slot,-the adding-mechanismwhich' with the gear-wheels, and the subtracting i other'set simultaneously, and this feature of my invention I carry out .in the following The push levers 53, are provided on one side" 7' withliftiiigarms 101, which are also pivoted To one of the comiecting rods 76, of the cages, see Fi' 1 preferably the. right hand I is a vertically positioned lever and extends up i whicl 'is-pivotally connected to the rock arm the levers 62, as the are raised by the push and pull levers, causing the levers 62 to swmg upward on the shaft 59, to which they :are

ivotally connected. The object otbrin'gmg the bars 70 in contact with the rod 111, IS

to return them to their normal position in the cage 73, after they have been thrown up by the action of the gears 66, and their pins 68,

as will now be shown.

The vertical sliding bars 70, are mounted in vertical recesses, formed in the inner sides of the twoside bars 71, of the cages 73 and 74, and at their lower ends they are provided 1 with vertical slots 112, which straddle annuends of the'trip latches, and to rods 117 that cage,

largrooves that are formed on a shaft 113, that extends from one end plate 72 to the other, and are secured to them. To the lower ends of each of these vertical sliding bars I pivotally secure the lower end of a,

trip latch 114, the u per ends of which are provided'with shouldered ste s, the vertical part of which rests against t e outside bars 71, while its horizontal faces extend under the lower edge of side bars and are held up a ainst them by contraction springs 115, w ich are secured to notches 116 1n the lower are secured at their ends 'inthelevers 62. ,A spring extendsfrom each of these latches to t e rods, and holds their notched upper ends against the under side of. the side bars of the and each of these latches is disengaged from the side bars of the two cages by the trip levers 69, which are provided. on their sides opposite those engaged by the'pins 68 of the gears, with projecting dogs 118, and these dogs lie. across the back edges of the trip latches at a short distance from them;

when in normal position, so that when a trip lever is pushed out by a pin on the engaging I gear it will throw the latch out of engagement with the-bar 71, and the sliding bar, trip lever, and latch'will be thrown up by the spring 115. Each trip latch is also provided with a laterally extending arm 119, which is positioned to lie below the trip lever, and extends to' the next or adjacent trip lever, and terminates on a line with its dog, so that the arm 119 of each trip latch, beginning at the right,.extends to but below the dog of the adj acent trip lever, as will be seen by reference to-Fig. 12; the first trip lever at the right beng the units lever in each cage and mechanism, and the next lever the tens, and so on to the last lever.

On the opposite side 'of each sliding bar from the tri lever, in each cage, and below their pivota end. I pivotally secure pawl levers 120,- the lowerends of which are curved outward and downward and extend in close proximity to the teeth of the gears, but lie in front of rods that extend across the casing, and are connected to its sides, the rod for the adding cage being numbered 121, while that 6 5} for the subtracting cage is numbered 122,

Yersirom engaging the gears. of these levers just above their curve right angled pawls extensions v12 formed, which extend from then said levers to the adjacent gear on the left, commencing with the units pawl lever (see Fig. 3). Thus,

for example, when the units wheel has: ved nine points or teeth, one of its pins 68,

and'a further movement of the wheel one point will push out the trip lever, whichw'ill, through its dog, release the adjacent latch 15124, and permit the sliding bar to which itfiis attached, to fly up. The 0 crating leveryls drawn forward, and the 111 levers 5 2, will lift all of the gears, their s wit, the cages, and the supporting arms or levers 62, as reviously described, and the projecting s iding "bar 70 will contact with the rod 111, which will restore it to its normal o'sition in the cage, and as it is forced down y the said rod 111, the awl 123, of the pawl lever 120, will engage t e tens wheel and move it one in-' terval, or' tooth, and in this way the adding of a unit to the next order is accomplished.

to the units wheel, the trip lever of the tens sliding her would be pushed out against its trip latch, but would not release it, consequently when the units latch flies up, its arm 1 19 will be forced between the do of the tens trip lever and its latch,'t hus lowing the tens latch out and allowing the tens sliding bar to fly up also, and as this bar also contacts with move the hundreds whetone ste thus after which itscurved lower end will contact with the rod 121, and move it out of engage-- nient with the gear wheel.

The adding mechanism is normally in 0- sition to be 0 erated by the gears (see. ig. 2'), but the suhtracting mechanism can lonly be used by lever.

After a type-key, say the type key No. 9, of the units column, has been depressed, the operating handle 35 is moved forward to the part of its stroke raises the shaft 65., and its vers 62, thus raisin the gears'ont of mesh with the racks and a lowing the units rack to move forward nine teeth, and then at the end of the forward stroke of the operating lever, the gears again drop down into en agement with the racks. The operating lever is then thrown rearward to the end of its back or ret rn stroke by the springs 26, and this movement ret'rns the suits rackto its normal position, and rotates the Units gear nine teeth, tlr's registering on the units gear the nine that has been printed on the paper.

' and these rods normally prevent the awn-a ro'm the side will contact with the adjacent trip lever 69,

Now, it the tens wheel had als o been moved nine points or teeth, only, previouslythe rod 111', its pawl leverwill.

fall limit of its stroke, and during the first;

gears and the cages and theirsupporting lecarrying 1 from .the tens to the hun ed,-

first operating the subtracting .nine, sayfiirf'example 1, the No.1 type-key of rowof type-keys is depressed, the

samd asftheNm- 9 was, and the operating lea ver i'sagain moved forward, 'b1t this time the unitr-ack'lmoves forward but one tooth, it being stopped by the stop on the No. 1 key, as-has been above described, but the op-- eratiiigl'ever still moves forward to the end of ts operative stroke, and in doing'so againra'ises theglgears thro'gh-the medium of the pull levrsfasflabove described, and when the operating-lever is reversed or moved back on its rearwardfstroke the gears all drop-down againinto engagement with the racks, and the units rack-moves beckons tooth and rotatcs the'znits'geafifonetooth, and in moving this orieextratooth one of the'pins 68 has] engaged the beveled edge o'f 'the trip lever 69, and moved thew-dog 11-8-f on its opposite end againstlthe uni-t nap-1 etch," which movement throws-theta 71 of; thejca e unitsf vertic'a std Kg thrown iipwardiby-i latch fi, of'the sidebar The l trip-lever and. the b'ar'and pawl lever are. efdontf jc n pr g tooth of the neirtf or tenths gear, in position to move-that: gear-one tooth, when the operatin" handle}? a 'alin moved forward, ,Inoverribht will accumulate on the tens gear s" one unit additional to nine, or a total of ten,and coinplete one cycle of the printing and, adding operation of the ma.- e3 5 chine. Thetnits sliding bar-70, willfn'ow standdi'rectly in front of the rod 109,and will thuspreventthe total key from being depressed, until after the operating handle has again been pulled forward, this rod 109 being connected with the total key shaft 79, by arms 1 07 and 108. But in order to make a total of these twonumbers, it is necessary to agairi'operate the operatingleve'r 35, to reand trip levers by the spring 1 15, are held up by this spring, until moved down by the upward movement of theeages against therod 111, by the movement. of the operating lever 35, and its pull rods, as has been before described. Consoq ently as the cage and the gears raise-.rp, the pawl eithepawl lever-of the. rnit-sliding lever, which is in engagement with a tooth of the tenths gear, ro-

' tate's the tens gear one tooth as .the gear moves upward, thus coinpletlng the registrating of the total ten, on the units and tens gears. And to print a total of this amo'tnt and to return all of the gear wheels to zero, I

proceed as follows: I press and hold the totaling key down, which actionthrough the meum of the right angled levers 80 releases allot the plates 36, and actuates the has the cross. bar moves-on,

. arm 107 to tilt the'rocka'rms S3 and '85, the

fingers of which will lift the pull levers 52,

from-the pins '87 ofthe arms 31, and let 'down the plsh' levers 53 in engagement with these pins, allowing the gears to be operated by the forward movement of the rack, while the said gears are raised out of engagement with the racks daring their rearward movement. The operating lever is then drawn" forward and the units wheel will remain stationary, as its pin 68 is against the; under side of the tnitstrip lever, but the spring .dog 27', will trip its type lever, and print a "The tens wheel naught on the record sl1eet..

een moved one tooth so that-its pin 6s, stands oneqto-othebelow the tens trip'leverg and thete'ns rack will therefore move-'0 y one tooth, when'itis stopped by the cont' t .ofthe pin 68,)viththe under side of the tens trip lever, bit itstype'bar-will betrippedyks' re' 1, on the record.

respective wheels have gagernent of their. pins .with the under sides of their respective trip 'levers, -,and thus, all

operation, "As the cros's," bar returns, the prsh lever 53 will be' liftcd ont'of engagement with the gears," andthecross bar will p"sh the tens rack to its normal position.

The 'operation of the ism is substantiallythe same as the addin mechanism,=exce t that. .thepins 68 stand subtracting rn'ebhanandwill-printithe heet, thus giving the 4 'total 10. The. remaining 'raekswill'remain 'stationary as their g I D Y w t not been, moved,- and-arejlocked by the. en- .115',-the distance otone' tooth,.so as to bring: j

the wheels stand at-zero, ready for another above the incline edges of the trip levers 69,

-of the subtracting-mechanism, .when the gears are at naught,=f0r thereason thatif one is to be subtracted'from naught, I necessarily have to take one from the -next higher order, and it'is necessary, .in' order to operate'the subtracting mechanism that tliesubtraoting mechanism be thrown and ;the gadding mechanism be thrown out, operating the subtracting; lever, as has been above described. Thus for examplafthereis a sum total in the machine'of"14,0,00,'-fron1 which we wish to subtract 5. illhe ii-vefkey in the units row isdepressed, and the operating handle drawn forward, and the uiiitswheel will-be reversed five teeth. Now the pins 68 in this instance, standing above the-trip levers 69, will press .all ,the s aid.le'vers out "tripping it, and causing it-to fiy up, and its arm- 119, will'crowd-between the ver and latch of the tens which will in turn trip the hundreds slide, which will tripthe thousands slide, the fifth slide or tens of thousands re maining. stationary for theieiasfon that its 0 erating wheel stands at 1, and-douse uent y its trip lever is not against the latc and thus, as the arm 11-9, of the thousands latch I to i flies up, itwill pass into the space between this said lever and latch, without'aifecting them. Thus the units wheel will be reverse teeth by its rack, while the following three 5 wheels are reversed one tooth by .the liftmg of the gears lay-the push levers on the return of the o eratinglcven'and the-contact of the raised s iding bars with a ,rod 1111A, which pushes them down' to their .normalpositionm the cage, causing their respective pawl levers to reverse these three wheels one tooth, and

to, get the resultthe subtracting lever is.

ed to its-normal osition, or soas to ring the adding mec anis'm into engage 'ment with the-gears, and the sameoperation is performed as when a total in-a-ddition 1s secured. In order to .automaticall turn the platen roll to move the record 3 inined distance, after the printing of each t 'ribbonintermittently from' one spool to tii other, I pivot in'a-bracketl24, a lever 125,, which is normallyheldagainst therear spring 126, will push the lever 125 forward,

so, causing the arm 127 to move rearward and the pawls 128 and 130 to engagea tooth,

and 'as the cross bar returns toits normal position, it will contact with, and: move, the le- -ver 125 rearward, which will draw the arm 127 forward, and move the ratchets 129 and 10D each, one tooth, as derstood by reference to Fig. '15. The arm 127 is supported on a roller 127A.

The type-ribbon is preferably a two-color ribbon, each color extending one half of the width of the ribbon throughout its entire length, the half of the ribbon used in adding being blue, while the half uscdfor subtract ing is green. bon, when subtracting is done I pivot near the upper end of the subtracting lever 103 an arm 131',- which extends rcarwa rd to within a short distance of the rear end of the casing, and is pivot-all connected to arocking arm 132, thc pivota point of which is slightly bar 134, which is fork its forward end to rovide ribbon guides 135, which are in the orm' of flat loops or eyes throughwhich the. ribbon passes, and they have openings on projectinglug 137, extending "vertica eet', a predeter rearward, while-the teeth-138 line of figures, and at the same time wind the- .the spri 1 tail and -t en on the'othertdhold the. pawl in of the respective ratchet wheels 129 and 10D,

will be readily un-- N ow in order to shift this ribnearer its opposite end, which, is-slotted at 133, and is connected by apin, with a sliding.

e at

-ment with said keys of said key-boarimeanstheir u 'r sides air the insertion of the ribbon. ili us, as the subtraction lever 103,-1s

moved'to bring the subtractingil, mechanism into operation, the arin 132 an be roclred, pushing forward the ribbon gu1de,-and brmgmg the green half of the ribbon under the ver tical center 'of theplaten roll. a i

In orderthat the operating lever may al ways be movedto the limit ofits, forward movement, when started in thatdirectiou, or 7 5 I to the limit of its rearward movement, when started in thatdirection, I form on the bearing 34 on one sideof the casing, I semi-circular plate 136, an upwardlyits circumferential edge, {ou each side of which'is a pluriijlity of ratchet teeth-tire teeth. 138 on the forward sideof the-lug pointing on the rear side of the lug point forward.- 8

a double pawl 139, iirtailwhic isengaged by spring dog-1401 iWhen' the' 'pawlis Upon the adjacent'rocklevenmfls" ivoted in engagement setiof-Qratchettce h it isout of-engagementfwitlf-the otheiyandigq dog operates-firstioii'one'side of the engagement with either one ofthe iother of the sets. Now: on the =forward movement of the operating. lever, the pawl position t-QQ 5 engage the teeth 138A, and-villain prevent backward -moveri1'entbf ilthe leverjbiifas the"- lever reaches its 'forwardlirnifi' jthejlug I will trip the pawLand eiigag e the teeth. .l38, which willcprevent any orwar dj rec movement, until after the lever 'CQfll-Q I pleted-its full rearward movement, and

will obviate any disarrangemerit of the "I by a partial movement of theracks. j

A correction" key-4 8 A is 'employe'd-inconi nectionwith rod 48, which 0 rates the lock: Q; ing plate latches 43, and this ir iay move out the'said latches, unlockft and allow any depressed keys "to their normal position, when a wron been unintentionally pressed andflti s ation' will not affect any of the otherfihiechan ism; U While I have illustrated and described the preferred construction ing and subtracting machine, I do not wish to be limited to the construction and arr e 1,

re I

ment shown,as manychangs mig l itbem e spiritof -i-bi" r zo therein without departing from myinV6ntion-.- .4 o

Having I described 1 my invention, what I claimas new and Patentis:

the cornbination wi th a casing, 'a of .depressible', keys,- hand a type-wri recording mechanism, -of ja series racks p glled to m0Veinto'enga'g-e r Substantia ssedto-f U of-my improved add- .rrs

dcsireto secure byLetters i l 1. In anadding-and subtractingimachine, i 5' ey-boa'rdfxzg leasingsaid sliding racks, a shaft in said casing, .a manuallyreciprocating lever secured "to said shaft, a pair of vertical rock arms se- "cured to said shaft, 9. cross-bar extending across said sliding racks and connected to said rock arms by a pivotal connection, spring tripping dogs connected to said cross-- bar arranged to engage the hook end of said typebars to tilt them away from said printing 2's.:- mechanism, as the racks recede; spring-actuated arms for normally-holdingsaid-dogs out .of engagement with said t -bars,- and prings for throwing said type-h i s intoprintrelation with said recording mechanism. "1 5 when said type bars are released by said P pi s i 52, an adding machine, thecombin'a'tiom 5}; .with: a supporting casing, a ke board, having! [a plurality of rows of keys'em racing the-nu- ;zo rneralsfrom one to nine-in each row,',a typemechanism co-operatively arranged with said key-board in said casing, each key having a notch in-one side, a projecting stop on the other side, a reduced terminal end z 5 forming a shoulder, and a spring arranged .to hold it in its normal position; a support for the keys, a hinged U-shaped tilting late having one of its limbs arranged to loc a key oi any of said rows of keys when it is depressed,

' and to lockthe remaining keys of. said row I against. depression, a spring for-hold ngfsaid' U-shaped plate in and for returning it to its nominal position, when released from-said key, l t h a g d to catch and'locksairL 3.5- U-shaped plate in its key locking position -w hen'-1t,is tilted downby the-depression of said-key, a spring arran ed to control the locking movement of sad latch, means for I .tilting said latch to release it from said key 40 looking plate, a rock shaft mounted in said casing, a reciprocating operating lever secured'to said rock shaft, a pair of rock arms secured to said shaft, laterally extending pins secured to the sides of said rock arms, 4 5 pull and push levers arranged to beconneetsd to said pins, and having their forward ends extending into contacting relation to said latch-tilting means, and means for simultaneously lifting one set of levers out of engagement withthe pins of the rock arms, and

for dropping the other set of levers into engagement with the'said pins.

3. In an adding and subtracting machine, the combination with the'casing, the t writing mechanism, and the key-board, aving the keys arranged insuccessivestep order, of sliding racks having stepped edges arranged to engage the keys of said key board; lock ng plates for said racks; latchesfor-said looking ,plates; a rodfor swinging said latches, and means .for depressing said rod;

'-a reciprocatingvoperating lever; rock arms operated bysaid levers; pull and push levers "arranged to be connected'with'on diseoninto engaging relation with the rod depress? ing means for said latches; a shaft having gear wheels, which are engaged by the sliding racks, and means connected with the push and pull levers for lifting the said shaft to disen age the ears from the racks: I

4. 11 an adfin 'machine, the combination with the c'asing,'t e numeral key-board, and a recording mechanism, of sliding racks, each tal arm, a lowerhorizontal arm extending rearward in said casing and having gear teeth, and a horizontal arm extendin forward into-the operative field-of sai key board, one edge of which is provided with a series of steps; rollersarranged beneath saidv sliding racks, said keys being provided with stops arran ed in o rative engaging relation to the'sho ders 0 said steps on saidslidmg racks; stopsarra ed to normally revent the engagementfxo :said sliding rac s with pressed, andmeans-for locking the kc s in a depressed position and for releasing t em a crossbar in normal engagement wit the slidingracks; -springsarranged to normally hold said sliding rack against said cross bar, means including'a reciprocating o rating lever for releasing said cross bar to a ow the said slida depres'sed 'key, type-bars pivote to said sliding racks; and means connected to said slidin racks and cross bar for causing said typeare to print the numerals corresponding 'to the depressed keys. v

, 5. In an adding and subtractin machine, the combination with a casing, a ey-board, and a t -printing mechanism, of a plurality, ofsliding racks co-oierating with said keyboard, and with sai printing mechantoward each key of said key-board, means said sli 'ng racks, means includin a; key locking device comprising a. hinge tilting plate with said keys for preventing ;the forward movement of. said'sliding racks when said keys are not depressed, and means for releasing said sliding rack when a key is depressed, and for locking said key in .a-depressed position, means including a reciprocating lever connected to said operating lever for releasing said keys and for restoring said key-board and sliding racks to their normal to said printing mechanism, a s ring controlled trlp lever supported-to sai casing arto actuate saidttype bars'to print a numeral,

nected from said rock. andseartengiedfl-wvitlrsaidgoperating leverimechanismfomre comprising a vertical arm, an upper horizon-- ism, a spring for drawing each sliding rack includin a lever mechanism for releasingpositions,'nuineral type carrying bars on said I slid ng racks arranged in operative relation said' keys, means. forreleasing said sliding racks from said stops. when a key is deingrack to move forward by itssprmg, so that one of'its stepped shoulders ma engage ranged to normally hold. each of said type bars in a position of disuse, a spring arranged 'and means including a trip spring connected"" 2 .130.

, whiten... .NNMMK leasin' g saidtrip lever and for actuating said type'barsto rint-a numeral.

6. In ana ding and subtracting maclnne,

Ithe combination with thecasing, and; the nu-.

ineral key board,-, comprising a plurality of; rows of keys, of a" tilting frame, a" shaft rota;

" tably mounted-in said frame, a plurality of of levers, arra' re gears rotatabljniounted on said shaft, a pair nged adjacent to the opposite the operating movements of said lever and lift the same; sliding racks, which an age said gears; a shaft havin rock'arins'w cl operate the pull and push avers, and a crank handle for operatingthe said shaft.'

. 7. In-anaddmg and subtracting machine,-

the combination with the casing, a printin mechanism, akey-board, and a pluralityo arpivoted thereto, of'a; shaft mounted across said cas- Y sliding racks each having a type ing, a'frame comprising two side plates pivotally mounted at their forward ends to the opposite ends of said shaft; a shaft mounted gears; sliding racks normally in enga ement in the opposite ends of said frame, gears loosely mounted on said shaft corresponding the combination with the casi ngand kevin number to the number of rows of he son said key board, said gears being norma y n. engagement with the sliding racks, means in-- eluding pull and push levers for lifting said gears out ofengager'nent with the racks, a

shaft having rock arms whiclroperatesaid levers, and-a crank handle for operating -said shaft.

8. In arr adding and subtracting machine,

hoard mounted on. said easing, of -a plurality of sliding toothed racks, a type-bar operativelysu ported on each slid ng rack, each type-bar. 'eing provided with a row of numeral types arranged in successive order from zero to nine, a gear carrying frame con-'- sisting of two side plates arranged on-oplpdsite sides of said casing, pivotal y secure at one end to said casing, and resting on said casingat their opposite ior free ends, a shaft extending across the free ends of said side plates and extending beyond, them, a row of gears rotatably mounted on said shaft, which are normally in engagement with the toothed racks, springs fer operating said racksin one.

direction ,a'cross bar for opcratin the, racks in an opposite'directio1'1,.and a liand operating reciprocating lever for operating the cross-barn,

9.- In ariadding and subtracting machine,

the combinatjon=of the easing, the key Board, the type-printing meehani em, and the hand operating lever,\vith a pair of rock arms within said casing arranged to beactu'ated by said operating lever, apair of arms slot-ted at-one ,end; and pivot-'ally connected at their slotted ends to said reel; arms across" lifting means, to lift thegears from; the racks 10. In an adding and subt-ractingfmw of a pair of push levers arranged one on each ranged one on each si e of said casing on the opposite side of each of said rock'arrns,

before the said racksare moved.

bar pivotally connected at its ends tdthe op-.

ated m the opposite direction by the said cross bar, contraction springs arrangedto connected with the rock arms for lifting the ,arms permitting a sullicient movement of the 5 chine, the combination of the casing, the key-, board, the typg'ewvriting mechanism, and the- 8;: actuating roc arms having projecting p ns,

" Tside of said casing on one side of each of said actuating rock arms, a air of pull levers ar-- each'of said lcvers being provided with a" I.

su lp'orting'the rear ends of said push and po leverajaahaft havinga'pluralityof with the gears, means connected withi'each the ends of said gear-shaftan'd for raisi v engagement witlisaid toothed racks ata predetermined movement of said levers.

, 11.v I -1; addi and su'b'tra'eting machine, the eombinatl on of the casing, the Revboard, the type writing mechanism; the

.- "sliding racks, thevoperating lever, the acateralpins, the cross-bar,- thegears, and the pull and push rods, which engage the pins of said rock" tuating rock arms, having arms, with'a pair gearloperating frames mounted onopposite SldGS- ofsaid ,g'ears, a tilting irame secured and arranged'to supc'nnnecting said irar'nes together, a rocki lever for, engaging the under side'of said pul rock arms, a shaft; extendi q adross said casingad acent to its rear en and secured in the s des of said casing, a pair of crank-arms 0nd named arm pivotally=connected to a con- -necting p'in. of said pull and push-levers- "rock-arm, a push lever connected at one end to one of said connecting rods ofsaid frames 'gan'd pivotally connected intermediate of its ends to said pull, and push-lever rock arm,

,and havingfits freejendpextend -to and ar pair of push and pull leversior engaging.

and push levers, to raise or lower them out of or 1nto. engagement with the pins of thee nd'olr: casing pivotally onnected to th opposite endof .saidarm, aslot in said sec recess adapted to'enga'ge the pro'ectin pins 7 of said actuating levers, means or $11 'ngly said gear supporting frameand gears out 0 port said frames,'a'pair. of connecting-rods securedto said .shaft, a' pairof levers connected atone endt'dthe free ends of said .5 board, the type-writing mgchanism, the

hand operating and actuating lever mechan ism, the subtracting mechanism operating lever, and the pull and push rods and the gears supporting tilting frame and shaft, the

- lo gear operating frames, and the gears, with a plurahty of vertically sliding plates in each of said gear operating frames,- a plurality of four pins secured at the quarter joints of each of said gears, a swinging pawl on each sliding 1 plate arranged to be engaged by saidpins assaid gearsare rota-ted, a vertically im ulse action lever spring-controlled'in' one irecticn of its moven1ent, arranged-to be normally locked to said frames and adaptd to be released by said swinging pawl plates,-and the rotative movement of said gears, and to be impingedagainst said crank-shaft by their springs when released, bythe movement of said gears and said-swinging pawl-plate,-and

2 5 a swinging pawlpivotally secured to each of I said impulse levers ofeach gear. operatin frame arranged to engage the teeth of sai gears, arranged to be normally locked'out of engagement with said gear teeth.

3o 13. In an adding and subtracting -machine, the combination of the casing, the numeral key-board, the type-printing mechanism, the sliding racks, the operating lever; the actuating lever and cross bar, the adding 3 5 mechanism,- comprising the gears, the gears sup orting shaft, the tilting frame, and the pill and push rods, with the two opposing gear operating frames arranged on opposite sides of said gears, the connecting, rods .ar'-

40 ranged to connect sa d frames together, the' subtracting mechanism operating lever connected to said connecting rods, a laterally projecting pin on one side of each gear, and

an operative gear rotatingmechanism ar- 4 5 ranged to rotate cachgear one or more teeth in, alternate order by either'of said gear opcr- (ting frames as either one of said gear operating frames is moved into operative relation to said gears and the other is moved out of operative relation to said gears bysa'id subtracting lover.

1 4; In an adding and subtracting machine, the combination with the casing, the

key-board, the type-writing mechanism, the.

sliding-racks, thegears engaging said sliding racks, and type-bars, and the operating and actuating lever mechanism, of the subtracting mechanism comprising the gear operating frames arranged on opposite sides of'said 6o gears, the connecting ro,ds, the subtracting lever, said frames being provided with a plurality of slots at their upper end, a rod across their lower ends,- a group of sliding levers said operating ever.

7 slidably supported. in saidslide-wa s, and by 5 saidrods, agroup' of swinging piste-levers piV aw said'levera alatemlly prdjectingpin on each quarter'poi-nt of one ,side of each gear arranged to engage said plate-levers, a group 'of'levers" each carrying a ri ht an led arm extending to the path of th 'leverp ate 79 of the adjacent sliding lever, and each providedwith a gear tooth'en' aging pawl arm,

arranged to be normallyhe (1, out of 'engage-' ment with the feethof said gearaa'spring forraising'said'pawl carrying levers and pawls 7 5' into'o'pejrative position, and an engagin abutment .adaptedf'to hold saidlevers an pawls and cause them to engage said gears. operatively'and-rotate them. as said gearsand their sup orting frames are raised by 80 1'5.. In an-adding and subtracting machine, the combination with the key-board,. the t -writing. mechanism, the sliding racks, t e numeral type carrying bars sup. 8'5 o'rted by said sliding-racks; the operating ever, the slidin mo 8 actuating mechanism, thetilting a'me, and shaft, the gears" mounted on said-shaft and normallyin engagement withfsaid'sliding racks, the actuatp ing levers, and-"the push and ull levers operative] arranged to be, actuated by said operating lever to raise said gears out of engage ment with said racks on either its forward or rea'rward stroke, of the two gear 0, ratin '95 frames comprising the numeral ad ing an subtracting mechanism arranged on opposite 'sides of said gears, ivotally hinged to said tilting fr me to be t1 ted therein, and a hand operatin leverrarranged to tilt either of said xoo frames either into or out of'engagement with saidgears', as it is desired to'add or subtract.

16. In 'an adding. or subtracting-machine, the combination with-the casing, the gear supporting frame, its shaft, and the seven cars :05 mounted on said shaft, of anumeral arding frame, and mechanism arranged on the front side of said gears and pivoted in said gear. supporting frame, the numeral subtracting a'me, and'mecham'sm pivotally hinged in no said gear supporting frame on the, rear side of said gears, said frames being connected to-' gether .to be. tilted toward and from said gears, a-lever connected to said framesand :rranged to tilt them toward and fron'roither 1 I 5 he front or rear side edges of said gears,'projections at the four quarters of one side of said gears, and meansincluding asystem of sliding levers and swinging levers-and pawls mounted in andcarried by said frame and Zi'g arranged to be actuated by the projections on sand gears for operatively rotating said gears to addor subtract, as desired.

17. In an addi orsubtracting machine, j

the combination with the casing; the operatr z 5 ing lever and sliding-racks,- eactuatingi' levers, the gears and their. supporting shaft and tilting frame, and. the key-board and printing mechanism, with a pair of gear op- .eratl'ng frames arranged on opposite sides of 1 0 A

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