US1807584A - Colffpttting machine - Google Patents

Description

June 2, 1931. E. E. BARNEY 1,807,584

" l` COMPUTING MACHINE Filed June 22, 1926 4 Sheets-Sheet l 5M A TTORNE Y www EEES Julie 2, 1931. -E E BARNEY COMPUTING MACHINE Filed June 22, 1926 4 Sheets-Sheet 2 9W F` INVENTOR MLV 2 /D' BY f ATTORNEY June 2 1931 E. E. BARNEY 1,807,584

COMPUTING MACHINE Filed June 22, 1926 4 Sheets-Sheet 5 INVENTOR aL-AMM. 1g, 51M

' ATTORNEY mmml WITNEESES j MM. @Afm 4 Sheets-Salleat 4 www ATTORNEY FEB INVENTOR June 2, 1931. E. E. BARNEY COMPUTING MACHINE Filed June 22, 1926 wlTN 5ans Patented June 2, 1931 U'ET STATES PATENT OFFICE' IEIDTEVINV E: DARNEY, OE NEW ROCHELLE, NEW' YORK, ASSIGNOR TO REMINGTON AC- YORK i.. an.

CORPORATION OF NEW COMPUTING MACHINE Application Icd .Tune Y 221,

This invention relates to computing manies and more especially to combined typewriting vand computing machines.

The invention has for its principal objectthe provision of an improved computing machine in which two totalizers may be operatedsimultaneously to accumulate a total and the total may be copied and substracted from one of said total'izers independently of le the other, so that groups of numbers may be accumulated on both totalizers and the total of each group cleared from one of the totalizers, leaving a grand total preserved on the other totalizer. n

Machines of the general kind just referred to are not broadly new, but the present invention contemplates certain improvementsI in such machines.

To the above and other ends the invention consists in certain features of construction and combinations and arrangements of parts.

all of which will be fully set forth herein and particularly pointed out in the claims.

The accompanying drawings illustrate one instance of the invention as applied to the Remington combined typewriting and computing machine. As Vsaid machine is well known" in the art and is shown in numerous patents, only so much of it is illustrated the drawings as is necessary to an understanding of the invention. In all of said drawings parts are therefore omitted or shown in section or broken away, as has vbeen found convenient or advantageous.

Figure 1 is a front view showii'ig the lefthand or main totalizer over the right-hand or auxiliary master wheel, which master wheel is temporarily disabled by the action of a cam mounted on said main totalizer.

Figure 2 is a front elevation in which all of the parts shown are in normal position.

Figure Sis a plan view of the same.

Figure 4 is a front elevation showing the parts in the positions they occupy when a certain key has been operated to set the main master wheel for subtraction and to disable the auxiliary master wheel.

Figure 5 is a front elevation showing the parts in the positions which they normally occupy wl'ien'the auxiliary master wheel has 1926. Serial No. 117,720.

been disabled entirely by a disabling device, thus leaving the main master wheel the only operative wheel and putting the machine in condition for use as an ordinary vertical totalizing machine.

Figure 6 is an isometric view showing various parts of the mechanism detached and spread apart from one another, but in such relative positions that an assembly of said parts can be readily understood.

Figure 7 is an elevation with parts in section about on the line 7 7 of Fig. 3 and looking toward the left.

Figure 8 shows a detail in longitudinal section;

The Remington machine includes a Remington typewriter of which in Fig. 1 only the platen 10, some of the types 11, and some of the keys 12 and key levers 13 are shown conventionally. The computing mechanism, sometimes called the Vahl mechanism and which is in the nature of an attachment to the typewriter, includes an actuator, the main frame piece of which consists of a casting 1/1 secured to the top plate of the typewriter. Projecting forward from the casting 14 are five sheet metal frame plates 15, 16, 17, 18 and 19, the first and last being end plates of the actuator, and the others mounted in between said end plates by means of bolts 21 passing through lugs 22 of said casting. All of these plates may have substantially the same construction as in the ordinary Remington machine, except the right-hand end plate 19 which is enlarged at its upper part to correspond to a certain extent with the outline of the Corresponding part of the plate 18. The Remington machine usually has both letter keys and numeral keys, and the latter in addition to being connected to the type bars 11 are each connected by a pull link 23 (Fig. 7) with a so-called fan 24, which by pin-and-slot connection 25 is arranged to operate a goose-neck cam 26 which, acting on rollers 27 mounted in differentially arranged arms 28 projecting from a differential rock shaft 30, rocks said shaft, each key turning the shaft to an extent appropriate to the numerical value of that key. Each of the fans 24 also operates'a universal bar 31 mounted on arms 32 projecting from a rock shaft 33; and this universal barperforms the functions usual in the Remington machine.

The ldifferential shaft 30, Fig. 4, has the usual gear segment 34 mounted thereon by means of a peculiar hub 35 which is fixed on the shaft. Said segment is pivoted to the hub atV 36 and it normally occupies the inclined position shown in Fig. 4; but when the universal bar 31 is operated'by the down stroke of a key said segment is swung leftward into mesh either with a main drive pinion 37 or with an auxiliary drive pinion 38, depending` upon whether the machine is set for addition, as shown in Fig. 5, or for subtraction, as shown in Fig. 4.

The main drive pinion 37 has a Vhub 40 loose on a master wheel shaft 41 and lsaid hub is equipped with a spline 42 engaging the hub 43 of a master wheel 44 which is fast on the shaft 41. rIhis master wheel is the main master wheel of. this invention, and it corresponds in all respects with the ordinary main ori-vertical master wheel of the Remington machine. In that machine the master wheel shaftis journaled at one end in the frame Y plate 16 and at the other end in the frame plate 18, but in the present machine it is prolonged to the right, its right-hand end being journaled in the end plate 19 so that at a suitable distance to the right of the master wheel 44 said shaft may carry an auxiliary master wheel 45.

The auxiliary or subtraction drive pinion 38 is journaled on a longitudinally slidable shaft 46, Fig. 3, the pinion being loose on the shaft and prevented from endwise motion thereon by two collars 47 and. 48 ,which are lixed to the shaft. A Vlever 50 of the first order is pivoted at its middle on a post 51 projecting rightward from the frame plate 16, the rear end ofthis leverbeing pivoted by a pin 52 to the shaft 46 or to the hub48 which is fast thereon. The forward end of the lever 50 carries a pin or roller 53which projects into an annular groove in the hub 40 of the main driving pinion 37.V lllhen the shaft 46 occupies its left-hand position as shown F ig. 3 the lever 50 forces the pinion 37 to occupy its right-hand position where it is in range of tie segment34, Fig. 4, when the latter is rocked towards the left; and the machine is then in condition for addition. It is set for subtraction by pushing the rod 1 46 towards the right as shown in Fi@V 4 thus bringing the subtract pinion 38 intobrange of the segment,the lever 50 moving the pinion 37 leftward out of range. In the ordinary Remington machine the change gear mechamsm just'described is operated by means of a subtract handle 54, Fig. 1, projecting from a piece 55 pivoted to the left-hand frame plate 15 and having a cylindrical flange 56 in which latter is cut a camgroove 57 into which a pin 58 projects from the left-hand end of the shaft 46. 'Ihe construction is such that when the handle 54 is in its upper position (in which it is usually'held by a spring) the mechanism is set for addition and it is set for subtraction by pulling said handle down. In the present instance I have addedto the slot 57 at its forward end a rightward extension 60 which in Fig. 1 is occupied by the pin 58 due to the fact that the machine as shown in that ligure has been set for subtraction by other means. It will be observed that this latter fact acts automatically to lockthe handle 54 due to the engagement of the pin 58 in the longitudinal exension 60 of the slot.

In order to keep the shaft 46 from turning, a pin 61 is provided. passing through it and projecting into a. longitudinal slot in a bracket 62 secured to the frame plate 15.

AIn the Remington machine the registering` mechanism consists of detachable totalizers, and in Fig. 1 two vertical totalizers 63 and 64 are shown and it is indicated by broken lines that if desired a dummy 65 may be added, said dummy being 'merely they skeleton orframework of a totalizer without any mechanism in it. The totalizers 63 and 64 are of the usual construction including carrying wheels 66 adapted to mesh with the master wheels 44 and 45 and said totalizers include the usual dial wheels 67. These totalizers are as usual adjustable and detachably mounted on the usual truck 68 which is supported at its middle on certain rollers carried by the casting 14 and at its ends is connected with the typewriter carriage to travel therewith.

The Remington machine has at the front of the actuator a frame bar of rectangular cross section extending from the frame plate 16 across the frame plate 17 and terminating c longed tothe frame plate 19 and numberedV 7 O. In Figs. 4 and 5 the righthand portion of this bar is broken away. In the ordinary machine there is also usually provided a small roller 71, Figs. 2 and 3, journal-.ed on the bar 7() and acting as a sort of guide for the totalizers as the latter pass overV the master wheel. The present drawings show two of these rollers, one in front of each of the master wheels 44 and 45.

The Remington machine also usually includes a. so-called safety bar7 72 extending from the frame plate 16 tothe frame plate 18 and arched upward slightly over the master wheel. rIhis bar also is here/prolonged to the frame plate 19 so as to co-operate with the right-hand master wheel 45.

Among the devices in the Remington machine which are operated by the universal bar 31 at each key depression is a so-called master dog 73, Fig. 3, to which a second master dog 74 is here added just back of the auxiliary master wheel 45. The dog 73 has an upper arm adapted to operate certain transfer levers inf the totalizers and it a horizont-al arm shown in Fig. 7 adapted to engagea rack 76 on the truck 68 to leek the sairl truck in its proper position during` the fera-tion of a key. This herizontal a" omitted from the additional or aux-:n y master dog 74 as it is not necess y to lock the ear ge at tivo different peints at the same time. The clog' 7 3 is (mera-.ted in the present machine by precisely the saine means as inthe ordinary Remington machine but in the present instance instead of being as heretofore en a short shaft extending between the frame plates 17 and 18 it is on a lor shaft 77 journaled at its ends in the frame plates 17 and 19, the tive dogs 73 and 711 beingN both fast on this shaft so as to be operated in unison. Said shaft is controllec by a returning spring 78, Fig. 3.

The machine preferably contains the disconnect key ordinarily included in the Remingtonv machine, also themeans whereby the actuator is locked unless the shaft a6 sta-nds inA one or the other of its operative poe' #-oiis, as Well as other devices usually found in the Remington machine and not here illustrated.

lWit-h the exceptions which have been mentioned above or which Will be obvious, the mechanismv thus far described is or may be like that described in the patent to J. C. Vahl, No. 1, 270,471 dated June 25, 1918; but the cross footing mechanism and its appurtenances described in said patent are (though not necessarily) omitted in the present instance. The mechanism shown contains some improvements made since the Wahl patent Was applied for and which .are described in later patents, but the said Wahl patent Will give a suicient understanding` of the machine to make the present invention understood. I

The novel mechanism of the present invention includes means in addition to the handle for Werking the change to set the machine for subtraction and back to addition, This means includes a shiftable device shown as a long slide rod 80 extending' through and projecting beyond the frame plates 16, 17, 18 and 19; but said rod has other functions also, as will appear hereinafter. Said rod has a collar 81 secured to it by ay set screw 82; and a spring 83 compressed between said collar and the frame plate 19, gives the rod 80 a normal tendency to occupy its left-hand position. @n its left-hand end said rod S0 has securee thereto a rearwardly extending arm 811 feined its end te embrace a. flanged collar 85 secured to the subtraction rod or shaft-163m such Wise that when the rod 80 is forced toward the right the engagement of this arm with the flange will force the rod 4:6 toward the right andkset the machine for subtraction; but the rod 46 can be forced to the right by the handle 54 Wl hout movi-ng the rod 80. On account ofthe eifset 60 in the cam slot 57 a spring 86 is compressed between the collar 85 and the frame plate 16 to hold the rod L16 normally set for addition.

As more clearly shown in Fig, 6, the rod 80 has secured thereto a piece 87 consisting` as here shown of a piece of sheet metal havingl a portion thereof Wrapped around the rod and made fast the o by pin 88. This piece 37 includes a downwardly extending arm and an upwardly extending` arm at the front of the red. The left-hand edge of is piece 87 is engaged by a push linger 90 projecting rightivard from a piece 91 made of sheet metal folded into trough-shape and fitting onto the frame bar 70 from beneath so that this piece engages said bar on the under side and on the i'rent and rear sides thereof. Said piece 91 is supported for slidmovement by tivo pins 92 which enter slots 93 made in the forward iiange of the piece 91, said pins projecting from the bar 70. In order to put frictional restraint onto this sliding piece so that it tends to remain in either of its tivo posit-ions, the means indicated in Fig. 2 may be employed. A hole is drilled into the bar 70 from the under side and in it are seated a compression spring 9e and a small plunger 95 which bears frictionally against the slide piece 91. In order to move this piece right and left by hand a projectingportion of the metal extends forward and is twistec into a linger piece or key 96. This linger piece or key for its principal purpose the set-tia.er of the mechanism C? into condition for Writ ,ng a otal.

The Whole construction ic such that the springs 83 and 86 normally held the parts set for add'tion but they can be set for subtraction by pushing the rey 96 rightivard, the linger acting on the rod S0 through the piece 87.

ln order to hold the parts in subtracting; position against the action of the springs 83 and 96,v a latch lever 97 is pivoted at 98 on the piece 87 and acte on by spring 99. The leftward project-ii at its end made with a i raction by the key 96, entf-#Ires a tooth or lug 101 prejectinn forward from the frame bar 70. Fig. lVhen therefore the kej,7 96 is pushes. ribfhtivard the red 90 is held in subtractiiui` position by the latch an d the slide 91 will remain in its righthand position due to tl -i ctien brake 95. n order that the r be restored to normal position bj i means are provided whereby if the kev 96 be pushed letivaid it Will release the latch 97 A pin 10Q projects forward from the piece 91A over an iucline 103 on the upper edge of the latch 97. 1f with the parts in the position shoivn in File'. 4. the key 96 be pushed leftward the piece 91 Willat first slide leftivard independently of the' rod 80 and latch 97 until the pin 102 stiikes the incline 103 and depresses andunhooks the latch 97 allowing the springs 83 and 86 to restore the parts to normal.

in case the key 96 is pushed to its Fig. 4 position for the purpose of subtracting a number (usually the total) from the totalizer 63 it is desirable that as soon as said number or total is subtracted out the parts return 'to normal position and means are provided to effect this result automatically. The latch 97 is made with an upward rounded projection 104 and one of the cross bars 105 of thc totalizer 63 is made with a hump or downwardly projecting cani lug 106, the location of these parts being suoli that in the step of the totalizer 63 from units position to subunits position this lug 106 engaging the rounded projection 104 depresses the latch 97 releasing'it and allowing the springs 83 and 36 to restore the change gear mechanism to normal.

For purposes which will hereinafter appear means are provided whereby the bar may be shifted rightward automatically by the travel of the carriage, this operation, in the particular arrangement shown in the drawings, taking place when the left-hand totalizer 63 is over the right-hand master wheel 45, as shown in Fig. 1. Saidtotalizer 63 is provided in its front lower part with a cani piece 107 secured to the totalizer by a screw 103 and adapted, as the totalizer 63 moves into engagement with the master wheel 45, to depress a follower roller 110 mounted on the leftward extending arm of a bell crank 111, the hub 112 of which is journaledV on a screw 113 screwed into and projecting forward from the front face of the Aframe bar 7'0.. The bell crank 111 is shown in its normal position in Fig. 2 and in itsY operated position where its horizontal arm is depressed by the cam 107, in Fig. 1. The depending arm of the bell crank 111 engages between the two prongs 114, Fig. 6, of the forked forward end of an arm or plate constituting a portion of a'sheet metal piece 115 which is slidably mounted on the rod 80. This piece 115 has the rather'complicated shape best shown in Fig. 6, but for the present purpose it will be sucient to say that it .is wrapped around the rod 80 so as to be supported by said rod and so as to be able to slide lengthwise thereof. This piece 115 will of course occupy a left-hand position when the follower roller 110 is upvand a right-hand position when said roller is down.

The sliding piece 115 is operatively connected with the bar 30 by means of a latch 116, thegeneral shape of which is best shown in Fig. 6. This latch at its left-hand end is pivoted by a screw 117 to the piece 87 which is fast on the rod 80 and the latch is normally held in itsupper engaging position byineans of a spring 118. At its right-hand end the latch piece 116 has a tooth 120 bent oil' rearward therefrom and capable of engaging either one of two notches 121 cut'in the under side of that part of the piece 115 which isy wrapped around the rod' 80. These notches are not visible in Fig. 6 but are plainlyvisible in the front views.

es shown in all of the front views of the drawing except Fig. 5 (which figure will be described hereinafter) the latch 11,6 is normally in engagement with the right-hand notch 121 and, therefore, the piece 115 is for all practical purposes fast on the rod 80 so that the depression of the follower roller 110 sets the master wheel 44 for subtraction.

Then the mechanism is set for subtraction by means of the cam 107 and follower 110 as shown in Fig. 1, it is not desirable that it be held in that position by the latch 97 but it should on the contrary move back automatically to addition as soon as the cam' 107 moves off of the follower. When the mechanism Vis shifted toward the right by the cam and follower as described the sliding piece 91 does not follow but remains in its normal position. The latch 97 is therefore moved rightward relative to the pin 102 which projects from the sliding piece 91 and the incline 103 on the latch lever is cammed downward by said pin which therefore holds the latch lever in its depressed or inoperative position as shown in Fig. 1, with the result that the parts immediately move back to adding position when the cam 107 moves olf of the roller 110.

The right-hand or auxiliary master wheel 45 is loose on the shaft 41 to which however it may be rotatably connected by a releasable clutch. These ends may be eected in any suitable way, the specific construction shown in the drawing having been adopted as a matter of manufacturing convenience in this particular machine. Y

Two collars 122,V Fig. 8, fast on the shaft V41 prevent endwisemotion ofthe master wheel 45, its hub 123, and its connected clutch member 124. The parts 45,123 and 124 are made out of regularly manufactured pieces, namely, pieces like the master wheel 44, its hub 43, and the main drive pinion 37, the combination however being turned end for end and the hub 40 of the drive pinion being removed and the web of said pinion being undercut as shown in Figs. 4 and 8 so that the teeth of the pinion project from said web. VThe releasable clutch inember 125 consists also of a regularly manufactured pinion 37 but turned end for end, its hub 126 projecting rightward instead of leftward as does the hub 40. The groove in this hub, which in the machine as heretofore manufactured was intended to cooperate with the pin 53, is here utilized to slide the hub right and left as will be presently eX- plained. The pinions 124 and 125 here used as clutch members have each the same number rightw ard of teeth as the master wheel. The releasable clutch member 125 has one end of its hub turned oft' or removed and the pinion is undercut as shown in Fig. 8 so that the pinion teeth project leftward. This pinion or clutch member 125 is oli-set angularly relative to the member 124 to the extent of one-hait tooth, and its hub is connected with the shaft 41 by a spline 127. The teeth may be pointed at their ends to facilitate the engagement of the clutch members.

The annular groove in the hub 126 is engaged by the two arms 128 of a. toi-lied projection from the sliding piece 115. These two arms are made by suitably cutting out and forming the sheet metal of which this piece is constructed as will be understood from Fig. 6. The construction is such that Whenever the change gear mechanism is operated by the rod 80 to set the master wheel 44 for substraction, the right-hand master wheel 45 is disconnected and does not turn.

If at any time it is desired to subtract a number from both totalizers, either because the computation involves a subtraction or in order to make a correction, this can be done by the handle 54 which will work the change gear and reverse the master wheel shaft but will not move the rod 80 rightward and will therefore not disable the auxiliary master wheel.

The arms 128 prevent rotation of the piece 115 about shaft 80. Y

Tn order to lock the auxiliary master wheel whenever it is unclutched from the shaft 41 the piece 115 is made at its left-hand end with a rearwardly projecting arm 130, from the end of which a tooth 131 is bent upward. Said tooth, when the master wheel 45 is clutched to the shaft, stands to the left of said master wheelY as shown in Fig. 3, but it moves into lockingl engagement with said wheel when the latter is unclutched, as shown in Fig. 5.

It is sometimes desirable to disabie the auxiliary master wheel 45 entirely so that the machine can be used as an ordinary vertical totalizing machine, much the same as if said auxiliary master wheel were netpresent in it. This is dene by sliding the piece 115 rightward relative to the rod 80, as shown in Fig. 5, the result being that the auxiliary master wheel is'unclutched from said shaft and is locked vby the tooth 131 even when the left-1 and master wheel is set for addition as it is in said Fig. 5. It is for this purpose that the piece 115 is made slidable on the rod 80 and is connected with it by the latch 116 instead of being made fast on said rod. The change `from one condition to the other is effected by means of a handle 132 mounted in a slot in the projecting right-hand end of the rod 8O and pivoted on a screw 133. Vhen this handle occupies its elevated position, shown in Fig. 5, the auxiliary master wheel is disabled entirely, and when it occupies its depressed position, shown in the other figures, the machine is set so as to use said auxiliary master wheel. The handle 132 is part et' a bell crank, the depending arm of which carries a pin or screw 134 which engages in a notch 135 in the projecting end o1 a slide bar 136, the general shape ot' which is best shown in Fig. 6. This is a sheet metal bar which passes slidably through a rectangular guide opening in the trame-plate 19, and at its iet't end it has a slot 137 that rides on a shouldered and headed screw 138 screwed into a lug 140 bent down from the piece 115, as best shown in Fig. 6.

This bar 136 in the ordinary operation of the machine slides right and lett in unison with the shaft 80. This unison of motion is brought about chiefly by he latch 116 which is pressed upward by the spring 118 which is made stiii' enough for the purpose. Said latch has a pin 141 projecting rearward therefrom and lyinO' beneath the bar l136, which bar has its under edge cut out to form two notches between which is a downward projection 142 having inclined ends. lVhen the machine .is set for its principal purpose, so as to use the auxiliary master wheel, the pin 141 is in the right hand notch at the right et the projection 142 and causes the bar 136 to slide in unison with said pin. vWhen the handle 132 is pulled upward from the position shown in Fig. 4 to that shown in Fig. 5, the bar 136 has limited lost motion rightwar-fl relative to piece 115, due to the slot 137. During suoli lost motion the inclined end of the lug 142 cams the pin 141 and with it the latch 116 downward, disengaging the tooth 120 from the rightehand notch 121. The continued upward mot-ion of the handle 132 causes a relative motion betweenthe rod 80 and the bar 136, tending to push the rod iei'tward and the barl rightward, the one relative to the other.A If theparts are in normal position at the time as shown in Fig. 2 the effect ot this action is to slide piece 115 rightward on rod 80, opening the clutch 124-125 and moving the tooth 131 into locking engagement with the master wheel 45. The last part of the motion carries lug 142 to the right of pin 141, aliowinglatch 116, 120 to snap up into engagement with the left' hand notch 121 and lock the parts in the Fig. 5 position. When the handle 132 is afterwards depressed to its normal position, the movements just described are reversed. Then the piece 115 is moved to its Fig. 5 position, it also actuates the bell crank 111 depressing the follower 110 to a position Where the cam 107 hasno practical effect on it. The machine can .new be used like an ordinary vertical totaliZ-ing machine, the master wheel 44 being operativeV andthe master'wheel 45 inoperative. If themachine be set for subtraction by means of the' key 96, the clutch( member 125 will be pushed rightward to an abnormal distance from the clutch member 124, but that motion is permissible. Y

. 1When the machine isset as shown in Fig.- 5 withrthe auxiliary master wheel entirely disabled, there is no real need for the hey 96 which Yunder that condition can do nothing that cannot be done by the handle 54. Moreover, if said'lrey was latched in its subtract position, the 'operator might spoil a piece oi' Ywork before observing the act. It is therefore deemed desirable to disable the latch 97 whenever the handle 132 is in its raised position. To this end said latch is made witha rightward extension beyond the pivot 93, said extension terminating in a projection Vor lug 143; and a lug or post- 144 is provided extending upward from the flat forwardly projecting part of the piece .115. This post 144 is made inclined on its Vrighthand tace in such wise that when the piece 115 ismoved rightward relative to the piece 87, thepost moves und-er the projection 143 of the'latch 97 and moves the latter to inoperative position.

There is a reason why the disabling device 132 is mounted as shown on the sliding rod 80 and connected in the manner described with the sliding bar 136. Grdinarily the etfect of pulling the handle up to this F ig. 5 position is to move said bar 136 toward the right, from the position shown in Fig. 2 to that shown in Fig. 5, the first part of the motion of the bar 136 being lost motion in order to enable the lug 142 to operate the pin 141, and the latter part of its motion carrying with said bar the piece 115 which unclutches the auxiliary master Wheel. 1n case, however, the cam 107 happens at the time to be over the follower roller 110, as shown in Fig. 1the piece 115 is already in its rightdiand position. ln that event ywhen the handle 132 first starts upward it moves the bar 136 rightward until the lost motion at the slot 137` is taken up, at

which time the pin 141will have been depressedby the lug 142. The second part of the motion consists in pushing the rod 8O leftward, the latch 116 moving with it until the pin141 moves off of the lug 142 and the tooth 120 snaps into the left-hand notch 121. This second motion is possible lbecause at this time the latch 97 is held inoperative by Vthe pin'102 as shown in Fig. 1 andas eX- plained hereinbeieore. ln short, after the preliminary rightward motion of the bar 136 Y it depends upon the condition of the parts at the time whether the further upward motion of thehandle 132 will cause a further rightward motion of the bar 136 or a corresponding leftward motion of the rod 80. Ylilounted as this handle is on bothvof these movable parts, it automatically does whichever vone of those things is required by the situation at thetime. It will be noted that when the parts are in theFig. 2 position the master wheel 44 is set for addition, and if the handle 132 is moved to the Fig. 5 position said masteriwheel remains set for addition. When however the parts are in the Fig. 1 position the left-hand master'wheel 44 is set for subtraction and the elevation of the handle 132 restores it to addition by moving the rod 8O lettward. 1t will be perceived that when the handle 132 is in its lower position the cam 107 is capable or" setting the main master wheel for subtraction but when said handle is in its upperposition the said cam cannot have that eli'ect. Y

1n Fig. 4 the parts are held by latch 97 in position for subtraction by master wheel 44 and with master wheel 45 disconnected. It now handle 132 be moved upward, lug 144 will release latch 97 and spring 83 will move shaft 8O to the Fig. 5 position. Y

When the mechanism is set as above described and as shown in Fig. 5, any desired number oi' totalizers may be mounted on the truc-lr 68 in any desired arrangement.

A target or indicator 145, shown only in Fig. 2, mav if desired be arranged to give a conspicuous visual indication when the key 96 is in itsright hand position, in order to lessen the likelihood of the operator leaving it in that position inadvertently. As here shown said target is a iat piece secured to the latch 97 by means of the same screw 146 that holds the spring 99; and said target has two vertical stripes of color one of which at a time shows through a slot in the casing (not shown). The right hand stripe may be ofthe same color as the casing, and the left hand stripe, which would show when the key 96 was in operated or subtract position, may be red, for example.

Some' of the uses oli the mechanism may be illustrated by examples:

Invoice No. Y

47 161 00 33 33 Credit 18 52 175 si Grand total 389. 71

lhen writing the. invoice numbers 23 and 47, the carriage is in the position shown in FigV v1 with totalizer 63 over the master wheel 45, and unless something were done to prevent it, the invoice numbers would be added into this totalizer. The operator could prevent such addition either by operating the ordinary disconnect handle ot the Remington machine or by pushing the key 96 to the right by hand, but it is much safer and on the cross -footing totalize'r, and one of said l totali/Gers` was used as a sub-totalizer and the other as a grand tota-lisci'. ',he work can be satisfactorily done by that means butv the cross-footing machine is a much more coniplicated and expensive apparatus than the one herevdescribed, anc the present machine will therefore enable this class of work to be done by a much cheaper and simpler machine than has Vheretofore been available for the purpose. l

lt will or course be vunderstood that the two examples given are merely instances of usefulness ot the invention, which invention is capable of solving other problems besides those given.

lt will also be readily understood that numerous changes mag, be made in the details ol' construction and' arrangement oi"- the mechanism without departing from my invention and that some of the features ot said invention may be 1used without others.

,Ti/What l claim as new and desire to secure by Letters latent, is

l. In a computing machine, the combination of two totalizers, two actuators ilo-r performing like computations on totalizers simultaneously, nunierai keys common to both actuators, a reversing key Jfor reversing the action 'of both actuators simultaneously in order to effect-subtraction from both totali/ters, second'key, and means controlled by said second key acting to reverse theV action oi one of t ie actuators and to make'the other ineffective.

2. in a computing machine, the combination of two totalizers, two actuators for effecting like computations on both totalizers simultaneouslj, numeral keys common to both actuators, a reversing rey for reversing Y the action oi' both actuators, a second key,

means controlled by said second key 'tor reversing` the action ci' one of said actuators and disabling the other, and interlock between said reversing key and said second key.

3. ln a. computing machine, the combination of-two totali'zers, a shait, two master' wheels mounted on said shaft, change gear mechanism for reversing said shaft, key and means controlled by said key to work said change gear mechanism and to unclutch one of said master wheels from said shaft.

4l. ln a computing machine, the combination of two totaliaers, a shaft, two master wheels mounted on said shaft, change gear mechanism or'reversing said shaft, a key, means controlled byA said key to work said change gear mechanism and to unclutch'one Voii said master wheelstrom said shaft, and

means for workingfr said change gear-inde-V when said device is shifted by said automatic 6. ln a computing machine, the combinatwo master tion of two totalizers, a shaft, 'wheels mounted on said shaft, a clutch for one oi said master wheels, means including change gear mechanism for rotating said shaft, a spri restored bar, means whereby said bar may operate said chanGe gear mechanism, means whereby said barmay operate said clutch, a key for moving said bar, automatic means for moving said bar, and a latch for said bar operative to lock said bar when moved by said key, but inoperative when the bar is moved by said automatic means.

7. ln computing machine, the combina-V tion with registering mechanism, actuating mechanism therefor, and reversing mechanism, of a spring restored device for working said reversing mechanism, a key for operating said spring restored device, said key adapted to remain in either` of' two positions to which it may be' moved, a latch Jfor holding said device in its operated position, and means whereby said key when restored by hand trips said latch. i

8. ln a computing machine, the combination with registering mechanism, an actuator therefor, and Vreversing mechanism, of a spring resto-red vdevice shiftable to work said reversing mechanism, a key for operating iid Y device, Vautomatic vso said device, automatic means 'for operating said device, a latch for holding said device in its operated position when moved to that position by said key, and aV connection between said key and said latch whereby ii' said key be restored manually to normal it will trip said latch and whereby when said device is operated by said automatic means said latch is renderedv inoperative.

9. ln a combined typewriting and comput- ,Y

'and to disable the other. 1

l0. In a computing machine, the combination with registering mechanism, of two actuators, a shiftable device, means whereby said shiftable devicereverses the action of lone of said actuators, means whereby said shiftable device makes the other actuator ineffective, and means for shifting the last recited means relative to said shiftable device so as to render the second actuator ineffective regardless of the condition of the first actuator and of the position of said shiftable device.

11. In a computing machine, the combination with registering mechanism, of two actuators, a slide bar, a device on said slide bar for reversing the action of one of said actuators, a second device on said slide bar for making the other actuator ineffective, and means for connecting said second device with said slide bar in either one of two positions in one of which positions a single actuation of said slide bar will reverse the action of the first actuator and make the second actuator ineffective and in the second of which positions the second actuator is rendered ineffective regardless of the position of said slide bar.

12. In a computing machine, the combination with registering mechanism, of two actuators, a slide bar, means whereby said slide bar may reverse the action of the first of said actuators, a piece mounted on said slide bar and capable of making a second actuator ineffective, a latch for locking said piece in either of two positions on said slide bar, and a handle and connections for unlatching said piece, moving said piece to its alternative position and latching it there.

13. In a computing machine, the combination with registering mechanism, of a master wheel shaft having two master wheels mounted thereon, a releasable clutch for one of said master wheels, change gear actuating mechanism for said shaft, a slide bar, means whereby said slide bar may operate said change gear mechanism, a piece movably mounted on said slide bar and connected to operate said clutch, and means for retaining said piece in either of two positions on said slide bar in one of which positions said piece will open and close the clutch depending on the position of said slide bar, and in the other of which positions said piece will hold said clutch open regardless of the positions of said slide bar.

14. In a computing machine, the combination with registering mechanism, of two master wheels one of which is actuated through a clutch, a shiftable device, change gear mechanism worked by said device, a piece arranged to operate said clutch, and means for connecting said piece with said shiftable device in either one of two relationships in one of which said piece operates said clutch when said device is shifted and in the other of which said clutch is held open regardless of the position of said device.

15. In a computing machine, the combination with registering mechanism, of two master wheels one of which is actuated through a clutch, a shiftable device, change gear mechanism worked by said device, a piece arranged to operate said clutch, means for connecting said piece with said shiftable device in either one of two relationships in one of which said piece operates said clutch when said device is shifted and in the other of which said clutch is held open regardless of the position of said device, a latch for holding said device in shifted position, and means whereby said piece when in the latter of its two relationships to said device disables said latch.

16. In a computing machine, the combination of two totalizers, an actuating shaft, two master wheels on aid shaft one of them connected by a clutch, and adevice acting when operated to reverse the direction of rotation of said shaft and of one of said master wheels and acting at the same time to release said clutch.

17. In a computing machine, the combination of a carriage, two totalizers, an actuating shaft, two master wheels on said shaft one of them connected by a clutch, so that normally the two wheels turn together in one direction, and carriage controlled means acting in a certain part of the carriage travel to reverse the direction of rotation of said shaft and of one of the master wheels and to disengage said clutch.

18. In a computing machine, the combination of a carriage, two totalizers, an actuating shaft, two master wheels on said shaft one of them connected by a clutch, a reversing key acting to reverse the direction of rotation of said shaft and of both master wheels, and a carriage controlled device acting in a certain part of the carriage travel to reverse the direction of rotation of said shaft and of one of said master wheels and to disconnect said clutch.

Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 21st day of J une, A. D. 1926.

EDWIN E. BARN EY.

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