US1291859A - Combined type-writing and computing machine. - Google Patents

Description

H. HANSON. COMBINED TYPE WRITING AND COMPUTING MACHINE APPLICATION FILED APR-9.1915

Patented Jan. 21, 1919.

3 SHEETS-SHEET I.

I N VE N TO FU Ward 14M BY ATTOR Y.

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

APPLICATION FILED 'APR. 9, I915.

Patented Jan. 21,1919.

INVENTOFU ATTORy.

a SHEETSQSHEET 2.

W|TNESSES= UNITED STATES PATENT HANS HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGIIlIE"' S,

TO UNDERWOOD COMPUTING MACHINE COMPANY, OF NEW YORK, 1%. Y., A CEO-EPO- RATION OF NEW YORK.

COMBINED TYPE-WRITINGAND COMPUTING MACHINE.

Application filed. April 9, 1915.

To all whom, it m w concern:

Be it known that I, Hans Hanson, a citizen of the United States, residing in Hartfold, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in 'lypelVi-iting' and Computing Machines, of which the following is a specification.

My invention relates to computing machines, and is herein disclosed as an improvement on my Patent No. 816,319, dated March 27, 1906, wherein is disclosed a combined typewriting and computing machine in which the numeral keys of the typewriter, when perated in an adding column or zone, set up on a temporary register the digits as they are printed. From this register the digits set up are carried into computing or adding wheels by means of a general operator, which, after carrying in said digits, erases all the set-up digits.

Said machine is more particularly disclosed in said patent as including a set of denominational bars, there being one bar for each of the wheels in which adding is done, and on each of these bars is an array of digit pins, there being one pin for each digit on each bar. These bars normally stand in such a positioi that the numeral keys operate idly with res p ct to the bars and pins on the bars. In the adding zone, however, the bars are moved one at a time into such a position that pin-setting bars operated by the numeral keys of the typewriter will be effective to set up pins on any bar which has been moved within range of the pin-setting bars.

In said patent the pins are set up by being depressed from their normal positions to a lower position in which the lower ends of the pins project below the surface of the bars, and these projected ends are utilized to drive the bars to turn the computing wheels, the amount of turning of a wheel depending on what pin is set on its bar. For thus turning the, computing wheels, there is provided in said patent, ageneral operator which underlies the bars and when actuated, comes forward and drives forwardly each bar to turn the computing .wheel, the general op erator driving each barby catching the depressed end of any pin thereon. All of these i'eatures are utilie ed in the machine to which the presentinvention is shown as applied.

The present machine is further shown as Specification of Letters Patent.

Combined subtraction bar are the counts-lio s betw Patented lan. 21., Serial No. 20,130.

one which is adapted to do subtracting on the same computing wheels, and is partly of the type shown in my co-pending application No. 626,550, filed May 11, 1911, wherein the subtraction is done by the complementary method. In said method of subtraction, the wheels always turn as itfor adding, but the subtrahend, instead of being directly subtracted from said wheels, is set up by the numeral keys of the typewritcr as by pins representing numbers complementary to those which are being printed as said subtiahend. In other words, if it desired to subtract 3, (5 is set up and added; it it is desired to subtract 0, 9 set up and added; and so forth and so on. This method of subtraction requires-a diiicreut setting up of the pins. One (way of doing this is shown insaid application No. 626,550, wherein there is a subtraction key for causing the machine to subtract instead of add. When this subtraction key is made eiiective, it not only connects the numeral keys to the pin-sctting devices in 'such a way that the" ct up C021!- plementary pins, but it also scs .p a 5 pin on every pin bar, this being done because if 0 is subtracted in any denom nation, 9"

must be added in that denomination, thi' or not.

Said subtraction bar also brings into play a special computing bar adapted to add a single unit to the computing wheel at the units place or column, thus correcting the well-known error of l in the units column. Among the connections operated by said connected to the adding pin-set whenever the subtraction lzey is act-nu said bars are disconnected from their am.

rock shafts, and are connected to rock shafts operated by numeral keys complementary in value to the adding shafts. Thus, for example, the 3 rock shaft in subtracting will be operated by the 6 numeral key, and vice versa and so forth.

My invention is therefore disclosed herein as applied, for the purpose'of illustration, to such a machine, certain features of it being especially adapted to cooperate with machines of the type previously built, while other features are. adapted to give results broadly new.

One of the new features which my present invention is especially directed to, is to provide means for the correction of errors easily and rapidly. For this purpose, in the present disclosure, I have illustrated how such error-correcting i'nechanism can be incorporated in machines of the general type of my aforesaid patentv and application.

One of the features which isof particular value is that one which perinits an operative in correcting an error to simply reset the typewriter carriage at the denomination in which the error occurs, and after the carriage has been so reset, the operative may correct the error by merely striking the cor; rect key, without the trouble of erasing any previous setting of the computing mechanism. This is herein illustrated as accomplished by enabling the setting of any pin on one bar to unset any previously set pin on that bar.

()ne of the other advantages attained by my present in'iproven'ients is the simplification of the structure shown in my prior patent and application. 7

Other features and advantages will hereinafter appear.

ln the accompanying drawings,

Figure 1 is a sectional side viewof an Underwood-l lanson combined typewriting and computing machine, showing so much of the mechanism as is convenient for illust'ating my invention as applied thereto.

Fig. 2 is a similar view, on an enlarged scale, of certain features of the subtractionsetting mechanism.

Fig. 3 is a side view, partly broken a way. of a pin bar showing the 5 pin set,

Fig. l is a similar View showing the 7 pin being set and displacing the 15" pin which has been previously set.

Fig. 5 is a sectional view showing a pin and its mountings in a pin bar.

Fig. 6 is a dissected view of some of the principal parts of a pin bar.

Fig. 7 is a perspective view of a pin.

Fig. 8 is a perspective view of the princt pal part ofa pin bar.

Fig. 9 is a plan .view 0%,thqfbin-setting bar connections in addition position.

' Fig. 10 is a similar view il subtraction positioi 4 Fig. 11 is a detail of the pin and latch structure.

In the usual Underwood-Hanson combined typewriting and computing machine, numeral keys 1 and alphabet keys 2 mounted on the front ends of key levers 3, when depressed, swing type-bars 4 upwardly and rearwardly by means of bell-cranks or st ll levers 5, soi that types 6 on said type-bars print as usual on the front side of a platen 7. Said platen forms part of the platen frame 8 mounted in the usual Underwood typewriter carriage 9,and said carriage is normally under tension, tending to draw it along in letter-feeding direction. the tension being supplied by the usual springbarrel (not shown herein).

The typewriter carriage is fed along a single letter-space at a time by means of the usual universal bar 10, which is adapted to be struck by heels 11 on the type-bars as they approach the platen, so that said universal bar will be vibrated r arwardly at each key-stroke and cause dogs 12 to alternatively engage the usual escapement wheel 13, and permit said wheel to turn a step at, a time. This escapement wheel is connected to the usual pinion 14, which meshes with the usual rack bar 15 connected to the typewriter carriage.

The typewriter carriage is adapted to be positioned by the usual Underwood tabu lating keys 16, which operate the usual plungers 17, so that column-stops 18 on the typewriter carriage are enabled to coiiperate with the upper-ends of said plungers, which act as counterstops. The remaining con nections of the tabulating keys 16 may be of the usual Underwood type, and are notshown in the present drawings tor the sake of clearness.

The numeral keys 1 of the typewriter whenever depressed, in an adding zone. not only print the digits upon tl c platen 7, but, also set them up on dcnominational pin or computation bars 20 one after another. The digits are set up on' these computation bars by depressing on each bar one of nine pins 21, and after a number has thus been com-.

pletely set up and printed, the said number may be carried into the. usual Under ood l-lanson/ adding wheels 22 by means of the usual handle 23 which is drawn forward to effect this operation. The adding wheels 22 lltLY? associated with them the usual carryover devices shown in said Hanson patent, but omittedin the present drawings for the sake of simplicityl To enable the numeral keys 1 to set the pins 21, there is provided for each numeral key a pin-setting bar 2% which is connected to a rock shaft 25 operated by its numeral key through connections analogous to. those shown in my prior patent described above; said connections being shown at Fig. 9, and

menses nect-ing said bar to the corresponding end of its cross bar 28.

Whenever a numeral hey is depressed, whether in the adding zone or not, a pendantextending from said key ihrough casing 31 of the adding mechanism prooer, descend-s and strikes a wrist 32 fast on roclr shaft 25, thus rocking said shaftand thrustpins 21 are normally out of alinement with their pin-setting bars 2%, out are adapted to be moved into alinenient therewith one after another byihe typewriter carriage as said carriage travels along through the adding zone. For this purpose each columnstop 18 is provided with a oneovay denomination-selecting cam 33, which is always effeo tive in the adding zone on one and one only of several. upstanding denomination bars 34, so that in the adding zone onc denomination bar 342 is cammed rearwardly, with the result that the opposite lower end of said bar is moved forwardly. This bar in moving forwardly, shifts its computation bar 20 Sllillciently forward to bring the pins thereon under the pin-setting bars 24, though owing to lost motion the computing wheel does not turn appreciably. This brings about the result that if any niuneralkey l is depressed, while one computation bar is thus moved forwardly, the pin 21 thereon corresponding to that particular numeral key will be moved from its upperinost position to a lower position where "said pin will 'be latched down by its led e' 36, which catches under a reciprocating latch bar 37, which holds it down;

one pin in Fig. 3 being shown thus latched down.

Since the typewriter carriage travels to the left and thus intercepts the right-hand bar 3% first while at the same time the typewriter is printing the left-hand numeral, connections are provided whereby the righthaud bar 3% operates the left-hand lower end in the series, the left-hand bar operates "the right-hand end etc. The connections for doing this include bails 38 of which one form is shown in my co-pending application comb i-O.

Since the numeral keys of the typewriter in writing numbers print digits ranging from 0 up to 9, there are provided nine pins 21 and in addition Mi 0 pin 41, salt 0 pin bein operated by the ZGZ'Q lrey of the typewriter:

The latch bar 37, which holds the pins 21 down, is universal to all said pins ill and is formed in the shape of a bar adapted to lie on. the fiat upper surface of pin-cage l8 on the-bar :20, Said latch bar 37 is held in place by 'nieans of pins 59 which in turn are held in place by an ll-plate %2 attached to said pin bar and overlying the snriace thereof, and being provided "able openings t project so that through which the pins 1 he plate straddles each The teeth of the L-p ila't faced cut-out portic pins 21, so as to limit i. movement thereof, thereby from becoming displace bars, and also preventing ins.

The pin bar 20 not only includes a comparat-ively thin rearward extension i l but also a thin forward I, said lastnanied extension. carr rack 9:6 by which the numeral are turned, said rack constantly meshing with a pinion it connected by a pawl and ratchet, as shown in my patent aforesai to the numeral wheels 22. 'l. he rack meshes with the pinion r2 suiliciently loosely to allow for the necessary forward setting of the pin bars 20 in the pin-setting op ration.

The pins 21 are carried in e pin-cage i8 forming part of the computation bar 20, and the pins are advantageously cylindrical and work in cylindrical bores 49 in said pincage. Each pin is normally held in its uppermost position by means or a spring 50, which bears against a neck 51 at the bottom of the bore i9, said neck forming a bearing -for the pin 21, and each pin bears against its spring by means oi a ledge or collar 52 which fits in the enlarged main portion of the hole 19'.

Whenever any pin is depressed, it, as above described, moves the universal latch 37. This latch comprises arms in f ont of or ry pin having cam faces 53 normally lying against and facing a com or inclined plane 5% extending inwardly from the outer edge of the, ledge 36, on each of'the pi s This inclined plane 5% therefore whenever its pin project into each of the oand-down 21 is depressed, forces the latch 3? forward so that the arms of said ltch w practically slip clear of the ledge 52% on every other pin. on its bar, thus releasing: any oihor pin which has been. previously ting that pin to rise. To is in thus rising when release cludes a short reverse inclin 55, which permits only pin to versal latch 37 a sli if necessary, to co The latch 37 is 1 1., L pfuill td turning; of the lever 64 bears.

wardly by means of a spring 56 anchored therein and lying within a cut-away portion 57 of the pin-cage 48, said cut-away portion including a post 58 on which the spring 56 draws. The universal latch 37 is guided by two flat-headed pins 59 which are fast on the pin cage 48 and form guides for the latch 37, which. is provided with slots 60 at its opposite ends toengage the pins 59. These pins 59 underlie the L-plate 42.

When it is desired to perform subtraction, the operative pushes rearwardly a subtraction bar 61 which extends through the front of the casing 31 and is pivoted to an idle rock arm 62 near the rear of the casing.

Whenever the subtraction bar 61 is thus pushed rearwardly, a pin 63 thereon strikes a lever er to shift the rock shafts 25 from their normal adding position to the subtraction position shown in Fig. 10. in this subtraction position, the rock shafts release the pin-setting bars and their linkages, from the adding wrists26, and connect said rock shafts 25 to the complementary linkages by means of subtraction wrists 65 which cooperate with subtraction lugs 66 on the corresponding complementary bars 28.

The lever 64: shifts the rock shafts 25 thus by means of a swinging plate 67 which engages notches 68' in said rock shafts, and against which plate the upper end, 69 of the The subtraction bar 61 may then be released to be returned by its spring, and the rock shafts 25 willbe detained in their subtraction position by means ,of a pawl 79 which swings up and engages the plate 68 to hold it where placed by the sub traction bar.

In addition to shifting the rock shafts to their subtraction positions, the subtraction bar 61 when actuated, also is eiiective to set all the 9 pins 21 in order to automatirally effect the adding of 9 iii 0 or nothing is to be subtracted from any number. To effect this result, the usual bail or bar 71 ,for setting the 9 pins in the usuaFUnderwood-Hanson subtracting machine is used,

' which bar is pivoted on the framework, car

rying the linkages 24 and normally stands clear of the 9 pins, and'their connections. When, however, the subtraction bar "61 is actuated, the 9 pin-setting bar is thrust downwardly to the point seen in Fig. 2. in moving to which position it strikes and depresses the setting levers 72 connected to the 9 pins 21, these leversbeing substantially the levers used for restoring thef -9 pins and shown in my co-pending application No. 626,550, referred to. These levers are pivoted each on its own pin bar and each engages its 9 pin by means of a boss 73 on its end, which lies within aiiat-sided notch 74 formed in the side of its 9 pin. When its pin rises, the rear end of any lever 72 strikes against the top of the body of the pin-cage 181, on the general menses 48, and thus prevents the spring 50 of the 9 pin'from thrusting said 9 pin entirely out at the pin-cage 48. lhis enables the slot 75 in the bar 42 to be widened enough to accommodate the boss 73, because the lever 7 72 provides the means for holding the 9 pin in its here. The bar 42 is unable to hold the 9 pin because it is cut away to accommodate the boss 72, although said bar holds the. other pins 21 from being thrust up out of their bores as described above.

In order that the present pin-setting device may be adapted for writing and correcting all numbers whether they are limited to the ordinary digits, or also contain the digit 9, have provided the special zero-pin ll p on each har20, said pin being like the pins 21 except that said pin 41 cannotbe latched down. Since the pin 41 is a 'zeropin, there is no need of latching said pin down, because, when 0 is to be computed in any denomination, the rack bar for that denomination is left standing at rest while the general operator moves forward. Said pin, therefore, is provided simply with the cam face 5%, and said pin has no ledge 36, but might be perfectly cylindrical. It is preferably, however, provided with a flat side 77' which cooperates with a flat side 78 in a notch on the L-bar i2, and thus insures that said zero-pin will always hold its cam face 54 in the right position to operate the uni-- versal latch 37.

After a number has been set up and. car ried into the computing wheels, the general v operator on its return stroke, carries the rack bars 46 reawardly by means of the usual lugs 79 which are struck by the crossbar 108 of the general operator on its return stroke. At the very end of the return 10 stroke, the general operator restores all the set pins 21 by means of the usual pin-restoring plate 80 which may be of the kind disclosed in my prior patent mentioned above and which is operated by a one-way cam in operator, and other con- Elections described in the patent to Frederick A. Hart, No. 1,176,364, patented March 21, 1916, filed December 10, 1908, This restoring'plate 80 is effective on a special ire-setting pin 82 which projects normally below the bottom of each pin-cage 1-8, and is provided with a cam 83, which, whenever the pin 82 is raised, cams the universal latch 37 forwardly, so as to release 1241 any pin 21 which at the moment held down by said latch. I

The cam 83 is eiiective on the universal latch 37 when the pin 82 is lifted, and for this reason, said cam 83 slants in a direction reverse to the cams 54: on the pin 21 and 00- operates with a correspondingly reversely shaped cam 8 on the universal latch 3?. The pin 82 is normally retained in this downward position by means of a spring 85 menses n the core 8% on the pin-cage, in pin 82 is mounted. Said bore a collar 8? near its upper end ich said spring bears, and the the pin 82 is provided with a s .v fitting the core 86, against '5 bears, to thrust the pin sin 82 is prevented from hein thrust up or down out of its bore 88 lo; the guide plate as extending into a fiatced notch on the pin which also acts to prevent the pin from turning. The pin 82 dvantageously projects somewhatoelow the die-n set, thus insuring that the pinplate 80 will be effective on said t release the latch 87 before it can ly strike any other pin 21. en a subtraction operation is finished, general operator will automatically reore the parts to their adding position, and purpose, the machine is provided usu l connections to this end. Said cns include a notch 90 in one of eral operator side bars 91 and in o h there usually rests idly the de- 1 end on? a releasing lever 93 jourframework oi the machine, and so Cari a rock arm 94, said last'named lr arm losing adapted to release the pinirg roclr shafts from the subtraction in, *hich they have previously been The rock arm 94: is effective to do this s when the general operator comes the lever rides out of the notch the rock arm 94 against a @l extending rock arm 95 fast on US which carries the pawl 70. Said t-named ai l, it will he rememberechis one which holes the rock shafts 25 in ieir subtraction position. This releases and the usual spring 97 embracone of the rock shafts 25, restores said s to their addition position by means e plate iii". construction above described, it will Jed makes an exceedingly simple assemble since the universal malt-e the-operation of the as smooth as possible, the lower s may he cut into the form cam 98 to coiiperate with the cams o5 which assist in releasing the zero pin 41 there is addition to the usual pin-setzero pin-setting bar 99 which is provided with an addition rock shaft and an addition wrist 100, so that if the digit 0 is Written in adding, the writing of said digit will erase any other digit previously set on the bar in the. denomination in use at the moment. i The 0 rock shaft '25 is also provided with a subtraction wrist 101 which is connected to the pin-setting bar :24 of the 9 pin 21, whenever the subtraction bar 61 is actuated. This connection is provided so that if a digit is written in any given denomination While subtracting, and said digit is erased and the digit 0 printed in place thereof, the printing of said 0 will set the 9 pin 21 in that denomination. For a similar reason, the rock shaft 25 of the 9 key is connected by a subtraction wrist 105 to the pin-setting bar 99 of the zero pin whenever the subtraction bar 61 is actuated. This is for the purpose of effecting the actuation of the zero pin whenever the 9 digit is printed in subtraction to correct the printing of any other digit, for, as indicated above, at such times it is necessary to unset any other pin already set in that denomination.

in order to provide for the mounting of these parts, the usual rear bar 102 of the frame carrying the pin-setting bars 24 and their appurtenances is cut-away at 103 to provide for the free operation of the Wrist 101 and is also provided with an extension 10 1- on which the 9 pin-setting hail 71 may have its shaft journaled.

The bar for adding in one in the units column is omitted for the sake of clearness.

Variations may he resorted to within the scope of the invention, and portions of the improvements may he used Without others.

Having thus described my invention, I claim:

1. In a computing machine, the combination with a pin bar, of a series of pins settable on said bar, a latch slidaole on said bar and placed thereon from one side thereof, and universal to said pins, and a holding loar overlying said pins and said latch and lying on the same side of said pins as said latch and adapted to hold said latch in positiorv 2. In a computing machine, the combination with a pin. bar, of a series of pins settable on said bar, a latch slidalole on said bar and placed-thereon from one side thereof, and universal to said pins. a holding bar overlying said pins and said latch and lying on the same side of said pins and adapted to hold said latch in position, roundhodies for said pins, and fiat surfaces on said pins for guiding" them against accidental rotation.

2. In a computing machine, the combination with a computation har. of a pin settaole on said loar, a body for said pin projecting through said bar, an enlarged bore in which said pin slides, collaron said universal to said pins,

rcan'i faces on said pins adapted to move said latch to position to release all other pins when one pin is set to be held by said latch...

4. In a computing machine, the combination with a computation bar, of a pin settable' on said bar, a body for said pin projecting through said bar, an enlarged bore .in which said pin slides, a collar on said pin fitting said bore, a spring confined between said collar and the end of said bore tending to hold said pin in a given position, another pin on said bar, a similar bore, a spring coiipcrating with said pin, a latch universal to said pins, a spring tending to draw said latch to effective position, cam tacos on said pins adapted to move said latch to position to release all other pins when one pin is set to be held by said latch, a third pin settable on said bar with which said latch cooperates, and a lever engaging said pin and adapted to engage said bar to limit the throw of said pin in moving from set to nnset position.

in a computing machine, the combination with a computation bar and a series of pins settable thereon, of a latch universal to said pins, a cameo eacl. or" said pins adapted to more said latch parallel to said ar, a spring returning said latch adapted to hold any of said pins set, a guide at each end ot said bar for said latch, and a stop bar overlying said latch and extending between said pins from one side thereof, adapted to hold said latch in position independ entlv of said guides.

6. In a computing machine, the combination with an array of bars, of a series of pins settable on said bars, a series of pin setting members adjacent said bars for set ting said pins, a single set of numeral keys for operating said pin-setting members, levers associated with certain of said pins, a separate key depressible to be eilective on said levers to set their pins, and means whereby the setting of any pin on any bar unsets every other pin on said bar.

7. In a computing machine, the combination with ten numeral digit keys ranging from 0 to. 9, of pin-setting members movable by said keys, a series of denominational members each comprising a pin for each of said keys, means whereby the setting of any pin on one of said denominational members onsets every other pin on said denominational member, and a separate key adapt l to set a single pin on each of said.

no ,ational members simultaneously.

.n a computing machine, the combinaneonate tion with ten numeral digit keys ran 'ng from 0 to 9, of pin-setting mem ers movable by said keys, a series of denominanominational member, a separate key adapted to set a single pin on each of said de nominational members simultaneously, and means adapted to-release all the said pins simultaneously.

5). In a combined typewriting and com-i puting machine, the combination with typewriter digit keys, of computing Wheels, members on which the digits written by said keys are adapted to be set up, means for carrying the set-up digits into the computing wheels, a subtraction device, a traveling typewriter carriage for determining into a which wheel the printed number shall be carried, and means whereby, if a given'nu'mber has been printed and set up as for a given wheel, the typewriter carriage may be re-positioned and any new digit set up, when the typewriter carriage is so re-positioned, will erase the digit previously set up at that position.

10. In a combined tybewriting and com puting machine, the combination with typewriter numeral keys and a traveling typewriter carriage, of computing Wheels, computation members on which the numbers written by said keys are temporarily set up, pins on said members for so setting them up, a universal latch on each member for said pins adapted to release all other pins when any one pin is set up, a subtraction device adapted to set certain of said pins, and connections between said keys, said pins and said carriage, whereby after a digit has been set up by the setting of any pin, the typewriter carriage may be re-positioned and a new digit set up at said position, and the old digit will be erased.

11. In a computing machine, the combination with a round pin, of a collar on said pin, a head on said pin by which it is set, a cam on said pin adapted to operate a holding latch, and an auxiliary cam on said 'pin adapted to be effective on he same latch when the pin is moving in the opposite direction.

12. In a computing machine, the combination with a bar, of a round pin on said bar, a latch for holding said pin, a. cam on said pin for moving said latch, a cooperatin cam on said latch, said pin having a ledge adapted'to be engaged by said latch to hold said pin, means for moving said latch to release said pin, a second cam on said pin assisting the releasing movement of said latch, and a second cam on said latch coiiperating with the last-named cam.

13. The combination with a series of denominatienal ortle, sets each pins ranging in rainy V a single means for se ins" pins at onee and pin opera enabling;- every pin from te set, to unset the *9? pin in the eerrespemling order when time set.

14. The eernbinatien with nest of pins arranged in order-rows or (leneniination.' including a plurality of pins adapted to be abling the 6 key t0 set a pin when subtraetin antl ti, be effective a pm when. adding, a subtiaetio for altering the eonneetiens between and bars te ei'ieet SHDU etion, and a pin- Stiflilg bar inatle elfeetire by sale snbtrz'iete reiease tion key to set a pin in eaeh row te enable subtraction m be effected.

15. The combination with a nest of pins arranged in erilers or denominations representing a series of ascending ."i-LiUSS from 0 up. of a setting mechanism for all said pins, edditionni setting nieehai :n'peenliar ,to all of the pins of highest n *nete value of the several orders oniieneminations tn set them all at once, and pin operated 0011- sections enabling the pins of inner values when set, to unset, one by one, the pins of highest ultimate value in the same orders.

it The combination with a nest efpins arranged in order-rows 0r denominations, ineiutling a plurality of pins adapted to be set representing the digits from It to 9, and also a 0 pin, of connections between saizi pins enabling some of the pins to determine the status of others of the pins, a series of digit-keys ranging, from 0 to 9, ()1(ldl'l.)di'S for operating said pins, and connections between said bars andsaid keys enabling the 0 key to set a pin when subtracting and to be effective only to relense a pin when adding.

l7. In a computing machine, the combinatien with a series of pin bars, each having pins thereon ranging from 1 to 9, of means for simultaneously setting all the 9 pins to cause the maehine to be efieetive to subtract, keys for setting all the pins from 27' to 9, connections whereby the setting of a 9 pin unsets any set pin, a Zero numeral key, and a pin operated by said zero numeral key for operating sai l eenneel'ions to unset any set pin.

HANS HANSON. Witnesses VV. 0. Wns'rPHAL, JULIUS DUGKSTIML

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