US1426377A - Totalizer clear signal - Google Patents

Description

H. GOLBER AND A. F. POOLE.

TOTALIZER CLEAR SIGNAL.

APPLICATION FILED 8.10. I919.

1 ,426, 377. Patented Aug. 22, 1922,

3 SHEETS SHEET I.

H. GOLBER AND A. F. POOLE.

TOTALIZER CLEAR SIGNAL.

APPLICATION FILED FEB. I0. 1919.

1 ,426, 377. Patented Aug. 22, 1922.

3 SHEETS-SHIN 2.

H. GOLBER AND A. F. PodLE.

TOIALIZER CLEAR SIGNAL. APPUCATION FILED r:a.1o, m9.

Patented Aug. 22, 1922.

3 SHEETS-SHEET 3 UNITED TA ES PATENT orrica;

HYMAN comma, 0F cmcaeo, ssame e F. POOLE, or KENILWOBTH, ILLINOIS, ASSIGNORS, IBY Mrsnn assronmnnrs, TO REMINGTON acconm mc MACHINE coarona'r'ron, or new romas, n. Y A conronarron on NEW Y To'rALIzE'n CLEAR SIGNAL.

ii Specification of {Letters Patent. Pate t d A 22 1922 Applicatioliifi led February 10, 1919. Serial No. 276,172.

To all whom it may bme'm: i j

Be it known that we, HYMAN GOLBER and ARTHUR F. PooLE,-'citizens of'theuUnited States, residing vat Chicago, Illinois,- and Kenilworth, Illinois, respectively, ,have invented a certain new and useful Improvement in Totalizer Clear Signals, o.f which the following is a specification f" 7 Our invention is an imp'rovement intotalizer clear rsignals ior calculating ,machines and is especially-designed ior ,use m the particular variety Off calculating ruachines known asthe \Vahl adding and, subtracting typewriter extensively marketed, by the Remington Typewriter -Company, the structure ofjwhich is described in numerous issued patents, for exampleqPatentvNo.

893,719, July v21, 1908, John C. i .lVahl, Patent No. 1,270,471, June 25, 1918, John C. \Vahl, Patent No. 1,148,733, Aug, 3, 19, Zl5, John-CfW'ahl-L w a, Numbers are inserted in the VVahl machine by means of the numeralkeys of the typewriter, there being ordinarily ten of such numeral keys, and. vertical motion of said keys ism-by appropriate mechanism translated into differential rotation of a certain wheel, known'as the master wheel. The totalizer of the 'Wahlmachine is mounted upon a traveling truck, moving synchronously with the carriage of the type writer, audin order to insert .a number in the machine this carriage first tabulated to the decimal place corresponding to the first significant digit of said number,:and the number is then inserted in the machjne one digit at atime. As eachdigit key is depressed, the master wheel rotates a number of places, correspondin to :said key, and inserts the required igit into the proper decimal place of the totalizer. After each digit is inserted, the typewriter carriage advances one step to the left,-thus bringing the master wheel into engagement with the next lower decimal order of the totulizer, and the next digit of the number is inserted in said place. This operation is continued, one digit at a time being inserted into the totalizer' until the entire number has thus been inserted. The mechanism by which the vertical motion of the digit keys is translated into a differential rotation of the master wheei has been thoroughly described in the cited patents to Wahl, and-since said mechanism is no part of our present invention, it is not necessary to describe it in detail in this place.

The Wahl machine is equipped with a ZI'GVGISIIIg dEVlCG by means of which numbersmay be inserted eitheizin addition or am subtraction. This reversing device usually consists of a gear shift between the digit keysqand the master .wheel, to the end that when the shift is in one-position, ythe' addition position,the master wheel will; rotate ini acounterclockwise direction. When the reversing device is put in itssubtraction position, the vertical motion of the numeral keys will result in a clockwise differential rotation of the master wheel and thus numbers will be inserted into the totalizer in a subtracting direction. This reversing mechanism is also described in the cited patents to Wahl and inasmuch as it forms no part of our present invention, need not be described in detail here.

In the VVahl machine numbers are insorted in the machine in an addition direction and the total of these numbers is visibly exhibited in the totalizer. Vhen it is desired to clear the machine, that is, write the exhibited total on the worksheet, the gear shift is thrown to its subtracting position and the numeral keys are operated in a sequence determined by the exhibited total. This results in subtracting-the 'exhibited total from the totalizer, which, if the operation has been correctly performed, then stands at zero.

Inasmuch as the lVahl machine has no operation corresponding to the automatic extraction of a total, that is, totals must be extracted from the W'ahl totalizer by the process of copying the total as just de scribed, it sometimes happens that the operator either misrcads the total exhibited by the totalizer, or operates the wrongdigit keys and thus an amount is left in the totalizer when the totalizer should stand at zero or be clear. Accordingly when the next computation is made in the machine if it is not noticed that the totalizer is not standing clear before the beginning of the computation a wrong computation will result, since the number stand ng in the totulisier wiil be added to the numbers in EUl'tSijl therein.

The object of our invention is to prowhich is adapted to he operated on by the prong 2Q of a; comb 18, rotatahly n'iounted in the fre'mew oi'k of the totelizei on a shaft 1.9. By reference to Fig. 5, it ivill beseen that eaelrnumeml wheel is equipped with a. gear Lfieonteinjng a. short tooth 1'7, and that co operating with each of these wheels there is {1 comb tooth 20. The oomh 18 is n i=ged -into engagement with the gems 16 by ine'ans of a spring 21'f-"wh-i'ch-is'mounted on the framework of the totalizer. The short teeth 17 ,of the gears16 are so placed in reference to the numerhlwheels 15 site the sight wihdow 22 in the totalizer eas- 15then-.-th--ngqchinerivillnbflloekd iiji. 'gn di the in'g' 23 the short tooth 17 will he in a position -operatbiisrgaflzentionimill ait ioneefi-be-e'stliti to tie-engaged byth'e c'o'mh 18." Fromthis n1.- -1t0ithebt rorxzivficlfliha s jiist been mfidekf arrangement-it obi iously results that'irkhe n Aiifurtheri-robjeclz nfi'oun inifentiehfisf the "the totalizei stands at 'zib alto-f the'short -.prqvisionubfzeitotaliser 'ieIeaX' SgnaI Which teeth 17 arein-pbsition'to' be engaged by the 20 wilkiuseimzgreatnmmrben ofipli-rts'twhiehihire 'e'cimb 18;}1ndsaid o'omb nfill inove in a.

malnaidymi m theii Wa'hb eehanisn th'ei hy lentblingmmz: dammo rbemsee with wam mach-ink 'whichdiretalneadyi ifl existencif 3-5 iAnothen a =qbjeetiiofli dni'i i xiventiofi Fis'Fthe 25s1pmvisi0nio0f 1m itpealiz'r 16195-15- sigria'lg tlie Weehaim'm: lefor nivhiehn'i'shhl'l he ii fflbs't exe. duslvel yi'in theztote'liier thre'hyper- "jgain'st the tension of the spring 2.1 in the imittingiitlieiusetpon thel same maehin'ejs' ol' "pjos i'tioii'shoihnf in F 1:" totalibersleqnipped fwiph 'bljl irnpxoved eleiir I erated in the decimal place to the rightpf-.. the owest de 1 l aoe of the ,toteli ze r. If! t e'ieien fi th mhe thteli'zer stands clear, this extra key, shall-ihereiniiftei" call the star printingvkg, may be operated it iwithouteinteifeynee; owei-er; the to- .t lizeradoesinot standet' clegr a-nd it'i's atempted-aw: opei atellthis" stai printiiigjkey, f

is steps-ta by boil theshb'it' teeth 17. If the a-t' zero,"the' factof 'zteeth 'of' the gear 16 contac tact of the prongs with totfali'zerddes not any of the long tingwith ,aiiy 10f j-Rigid 'with the-comb 18 is an ann'E-M,

.. T providiafrtotalizev elem? signal 'iwhieh will be simple andihfiici'erit :in i ts b peietibnfii'rid title in a, clockwise direct-i wconsist offihutwgi fevg 'ea'si-ly mime pailtsl ffe'itending between the lever'25 and a. s'tiid 28 35-" "Furtherlobjeets of eui" invention 'willjbe in the tota-lizer sideplate69; The lever hereinafterdesci ibed ixijthe speeification and 'is 'p'roi' ided with ailatch 29,- which .--will appeai-viih 'thefidlaimsi "ed 'te engage a lever .'-I 'Re'ferz'ing' now-to theffigliiesz 1 on thshafi- 31, 'which =Fig.=*1is ia f sectional View of a .Yahl rnaone set'of the swim P t 9. 0f the to-talizei' and is urged t 011 y' i n' 2T rotatablj'mounted also serves to'support mg arms 32 customarily that 'i'vhen the 0 is bppo- *tlie-prhiig'sffl will serve to hold 'the' comb J is adapt- 40" chine equipped w ith" in" improved mechapresent in the lVahl'totalizeiz' Thtz'lever 30 ni$m;j" ti's'gii'en a tendency to rotate about the shaft Fig. 2 is ab'seetionelong the-line2'2 of 31 in a counterclockwise directi'oh (Fig. 5) Fl 1 j by'a spring 33 extending between said lever ig. 3 is-a' i'eiir View pf'the'totalizer with and shaft 34 in the framework of. the totalafmuehofth' mechanism removed: izer.

*' From the above vious that if the t zero and the lever Fig. 4 is details? Fig. '5 is 'a perspective view of the total-- i zer clear signal as itis in cooperation with certain pa-I'tsbf the actuating mechanism,- d y -r 5:: 4 Fig, '6 is a view' of the type bar for the sterprinting kev'. U

' Referring sq-Fig. 1:' The totalizr'lO is mounted on ati'uclr' ll, which," as 'is eustemary in the Wahl infiehiiies, moves step 'hy step to the left in' synchroii'ism 'Y-f'ith the mo tion of the typewriter carriage. 'The tofah i zer 10 contains tlieeustomary cqrryinggeais 12, cali ying' mechanism l3,m'termed1 1te gears 14 and number ivheels 15, all of WhlLll are old and common to the'VVuhl totalizers of the prior ai-t. The'nuniber Wheels 15 are rigidly mounted to gears 16, each one of whibh is equipped with :1 short teeth 17,

a perspective iew of certain' description it will he oh- H otalize-r does not stand at 30 he lifted from its normal position, shown in Fig. 1, that said lever \fill'he' held in 'itselevntecl position by the lzitch 29. However, if the totalizer stands at zero when the lever 30 isliftod then the "lever 25 will be held in the position shown in Fig. 1, and the leverBO is free to return to its normal position. In our m'zichine, therefore, we have this condition; That the fact of the totalizers standing at zero perinit s the lever 30 to he lifted and returned to its normal position without-interference. However, if the totalizei' does not stand at 'zero' and the lever 30 he lifted, then it will be caught on the latch 29 and will not be able to return to its normal position shown in Fig. 1. It is to he noted that the normal position of the lever 95 is determined by its the VVahl machine? The lever is located to the right 'ofthe lowest decimal' lace in the totalizer and wexshall 'hereina 7 r call this decimal place the sub-units placeiof the totalizer, sincethis decimal place .is one space to the right ofxthe'klowest or ,units;decimal place of the totalizer. r

We shall now describe the-mechanism by means of :which furtheruloperation of the machine .is prevented-the event :that .the master do 40 :is'operated infthe sub units place of :4; e vtotalizerawhen saidi totalizer does not stand at mm; 1;

Present in "the "Wahl machine ='and thoroughly described in the issued patents above referred 'to-is'a shaft; known as a rockshaft, which we have numbered'41 in this specification. "Thisishaft has mounted on it a rocker 42, having; austud 43 mounted therein 5 and is' 'connected 7 by. a: link 44. to

' a dog operating cani"45.;mounted on a shaft 46, rotatably v moilntedrin" the* framework.

'A slot 47 is cut'in thetoperating cam and serves to operate a roller '48, mounted in a lever 49 rigidtothe" master dog 40, which in turn is'mounted' on a'shaft '50 rotatably mounted in" the framework of the machine.

The rock shaft I41':has depending arms '51, having a rod 52' supported thereby, said rod being in the path of the fans 53 customarily present in the Wahl machine. Reference to the cited :patents ofWahl will disclose the fact thatthere' are ten of these fans 53, one for each of the nine di 't keys and one connected to the 0 key. ach of the fans has cut into its surface a series of ratchet teeth 54 on the upper side and a second series of'ratchet teeth 55 on the lower side. The ratchet teeth 54 are adapted to be acted on by the front full stroke pawl 56, and the ratchet teeth 55 are adapted to be acted on by the back full stroke pawl 57. The front full stroke pawl 56, being in engagement with the teeth 54 during the down stroke of the digit key, prevents any upward motion of the key until the down stroke has been complebed and the' back full stroke pawl 57 is in engagement with the teeth 55 on the up stroke of the digit key and prevents any downward motion of said key until the up stroke has been completed.

The rockshaft 41 has rigid with it an opcrating arm 58 which by its action on an arm 59 rigid with the back fullxstroke pawl 57- hol'ds said pawl out of engagement with the teeth 55 during the downstroke of the key. At the completion of the downstroke of the key, the rockshaft 41 turns ina counterclock- .wise direction (Fig. 5) and thearm 58, by its action on an arm 60,.rigidfivith the front fullstroke pawl 56; serves to hold the-latter mutbfehgagement with the teeth 54 on the 'npstroke'of the key. The mechanism by 'which these changes are accomplished i is :thoron'ghly' described in the. cited atent-ito 'Wahland therefore need not be escribed "ih this placel It will bsufiicient organ understanding of our present invention-,to enot'e :thaodurin'g the downstroke :of thenkey and consequent rotating 'of themaster wheel 61 5. differential -=am'ount, 1 the. .front' full -stroke pawl 56 is'heldiin the ositionishown einzFiga5, and: on the upstroke of the digit ekey the lfrontpfulh stroke {pawl 56 is withadraw-h from a thenteeth- 54 randlthe back: full stroke .pawl 57 is thrown into'engagem'ent 'lwitha-the :te'eth 55,-;wReference, to; the cited -patent to .Wahl willfurther disclose -that .on.

. the 'first' partiofilthe downstroke of any of the-digit keysnthe master-dog 40 is rotated "inia clockwise direction'and remains in this position until the downstroke of the key'is l cdmp'leted gthis motion of the imaster dog being provided 1 for by the concentric 'surfaceswf the ?slot 47w Atthe completion -of thedownstroke'the lmaster dog suddenly returns to its normal positionf'sho'wn in Fig. 1 and during the upstroke of the keyremains in suclLpoSition. Extending from the masterfd'og 40 and-rigid 'withzit-is; the truck lock 62, which engages with the teeth 63 ot'a rack 64'ri'gid" to the lower side'of the truck 11. Thetruck lock isfor the urpose'of preventing any motion of the typewriter carriage "and its attached totalizer during-the rotation of thepmaster-wheel or, what amounts to the same thingaduring the 'downstroke of any of the digit keys. from'any reason the master dog 40 is prevnted from returning to its original position upon "its completion of the downstroke ot'any of the digit keys, then by reason of the engagement of the'slot 47 with the roller 48 the rockshaft 41' will be prevented from returning to its original position and consequently: the front fullstroke'pawl 56 will remain inengagementfwith the: teeth 54 of the fan 53,-and'fu rther motion of the attached digitkey-will be prevented. Also further motion of the truck 11 relative to the master wheel will be prevented by the truck lock 62. When this condition obtains, the calculating machine is totally locked against further movement, since the digit key cannot rise and the truck 11 is also held immovable by reason of the truck lock 62. p

In order to prevent the return of the "master dog to its original position, 'when any ofthe fans 53 are-operated in-the'suhunits place of the totalizer when the total- -i'zer doesnot'stand at zero, we have provided a back arm 65 on the operating tail 38. Obviouslyif the-leve1'-;30 is held in its =-ele\ ated position-(shown in Fig. 5), the. 'rnastendo' cannotreturh to its'nbrinal 'positioh-upon' the completion of the down- TO'strolre-pf the key Qonsequently, it is attem ted to oPerate-any-FOf-th fans. in the 'su -unit's place of the' totalizerwhen the totalize'r not stand 'at. zero, then-the calculating; inachine' will be completely locked-up andithe attention of the operator "iwill- *he "called to the 'fax'zt that..-the im'achine isbeingimprdprlyroperatedss w :5" emfechailism of the star-or-hleari singnal prjntin at pe-tar-cemed not :he de- '20 scribed etail 'furthr than=to=note that this'har is due oi the'drdihary printing type 5 biilrsfof 'the f-RemirlQtoii machine, preierabl-y thebarrwhich-lprints0 in its hormal position. This bar-is operated the zero digit ke'y' 67 "and 'serves' to print zero' when oper- -ated='ui1der"normalconditions In j'sho'rt, l the stai-Ftypecis theruppenhase character bn the type' bar' which, in lower casepprints *t'he 2,8130.E I-"'71! I", z -----=As previou'slj-nobed,'tl1e zero di itzkey "is connected to one of the'ifa'n's 53 and therefore it Fis'conVeitieht toTi'na-kthis z'ero digit key-print th'echa-racteris'tic'mark for a clear signahwhen said .key 1 is operated while the E shiftzkeyof thetypwriter; is depressed.

-'=-- The operation of tliemachine in extractihg-altotal h'sfollowszi By -means of the custonlarY gear-shift (hot shown) the master whee 61 .is placed in it's subtraction 'position a'nd then'umber appearing on the totalizeris copied out, This results in subtracting this number from the totalizer. *If-thi's subtraction has be'endone correctly, the totalizer will stand at zero and the rimsizer in the sub-units place; of a the typwriter is then operated, thus throwing the type bar 66 into its shift position. and the key 67 is then operated. Thiswill result both in printing the star and in rocking the-master. dog in a couritercloclnvise direction ig. 5). If the-totalizer stands at zero, the latch 29 will then be held in a position not to engage the lever 30-, and this le've'r will, under the influence of the spring 33, return to its normal posit-ion, when the master dog 40 is returned to its normal positionupon the completionof the do'w'nstroke of the key 67. However, if the totalizerQdoes' hotstand at zero, thenthe latch 29 will be in a position to engage the lever 30 and .hold-said lever in an elevated position. The back arm of the tail 38 will then prevent the return of the master dog 40 to its normal position on the comter wheel will he in contact with the total- The shift key pletionof the downstroke'of the key G7,:1nd the machine will be locked up, as previously noted, thus callingthe attention of the operator to the fact that an incorrect total has been printed on the paper.

r In order to provide means for restoring the machine to service under these conditions, we have provided the lever 25 with a finger piece 68, which project through the totalizer side plate 69. In the event that the machine has, become locked up through the printing outof a wrong total, then the fingerpiece 68 may :be pulled towards the front of the totalizer,thereby' maimall unlatching the lever 30. This will at oncere- -turn to its normal -position, thereby permittirig'the' return of the master dog 40 to its normal position, which in its turn will "pennitithemeturn'ofe the digit key 67 to -1ts normal :positiomi The master wheel will -.then be thrown into F addition and the inlicorre't nufilbei' justa-printed on the workrsh'eet will he =re1nserted into the totalizer, thus restoring the totalizer to its condition 'before'thewerroneolis total was extracted therefrom.-- The'2eriohedus totalppearing upon the:pap'ernis then erased; t ie master 'whel'xmtu'rned to itssubtracting posit-ion L and .the correct t'otallprinted out. This will result in therreturn'of the totalizer to zero, wand when theikey-67is operated in the subunits place, thus printing a-second star -over the star previously printed, it will, return to its normal 'postionfiwithout interference. The totalizer of the machine will then be 'clear and: read 'for anew computation.

-'It inay ihei urged that the presence of a .star on the worksheet opposite a total does not necessarily meanfthat the correct total Zhas been printed-:-from the machine, since, as just"noted, one' may print an incorrect total, then rint'th'e star, which will result in the mac ine becoming locked up. The machine can-ihen-be re eased by manual operation of the finger piece 68 and a new computation'stnrt'ed with the totalizer not standing at clear. However. we do not consider that this objection is at all material, since an adding machine of the lVahl type can always be intentionally misoperated. as. for oxample,-by inserting a piece of paper between the type bar and the platen, where by a number may be inserted in the machine and not be printed :on the platen at all. \Ve do not aim in'our present invention to guard against; malicious misoperation. The person who operates a Wahl machine is more interested than anyone else in operating themachine correctly. since the operator is the person who will have to search for errors when the same have been discovered. Consequently, it is sufficient for our present purpose to warn the operator at the time an incorrect total is extracted from the machine, and to this end our hereinidescribed invention is well adaptedpsince uponzattempting to print a star in the subunits place when the totalizer is not clear, the machine will become locked up and can only be restored toworking condition by intentional operation of the fingerpieoe 68. .It will be noted that by the present invention' the condition of the register is tested by operating thekey 67 iii-the sub-units positionil'fwhen-this 'key is depressed it immediately returns to normal'position without'loclring up the machinethen-the operator issthereby-notified that the totalizer is clear, but if when it is operated the key remains in its depressed position and locks up the machine then .the o erat-oris'by that condition notified that die machine is not 1 clear; The star type isnsed'merely to'indicate or to assure thatithis key was operated in the Lsub-units position. .rThehoperator is required tohdepress this key whenever. .the

total is co pied and the printing of the star in-the next spac/immediatly -following the number; shows ithat theidre'y: iwas' depressed atithat rtime T lItuwillp of coursaabe minder stood thatnany other .suitable =means might be employed :f orr assuring that .this -.particu-' lap key was opera-ted at that partic ular time.

' 'Mfany advantages t resultlffrom our. im:' proved mechanism herein described, anion which we "maynote' that it) may be applied to machines mlready'in existence the'simple expedient of supplying them with a totalizer equippediwith themechanism shown in the subunits place and changing the type in the'zero't-ype'bar so thatsaid type will print a star or other characteristic clearance mark when thrown to its shift position,

" anism of the lVahl machine.

Anotheradvantage resulting from pm improved mechanism is its extreme simplicity, since it consists in the addition of but a few simplepartsto theordinary totalizer mech- V It will-be furthor' observed that totalizers equipped with'ourclear signal device and totalizers not so equipped rrgay'be operated on the same machine without interference. It is only" necessary to remember not to attempt to printflthe star in the sub-units place of a totalizer notequipped with our improved signal. As a matter offact, it willbe impossible to operate the star'printing key in -the sub-units place of anytotalizer not equipped with ourimproved clear signal, since the lYali l totalizers -are customarily providedwith aii extension of the side plate 69,- which registers with the master dog 40 when the totalizer is in the sub-units position and thus prevents the rotation of said dog. Therefore, in operating a machine equipped with ordinary Wahl totalizers and l'lahl totalizer equipped with our herein described invention, the operator is automatically prevented from misoperating the ma china.

In our herein described structure, which is our preferred form, we have describedthe star printing signal as being placed on the zero key and printed by throwing said key into its shift position. However, it is by no means necessary thatthe zero key; be employed. Any of the other digit keys might be employed for this purpose or-indeed-an extrafan -53 mightbe put into the-actuator and connected .-to the special key which printedwonly the starpthus obviating the necessity of operating the typewriter in'its shift position when it was desired to print the characteristic mark for theclear signal. \Vahl actuators equipped with eleven fans are described in the Ipatentto, Arthur .'F. Pdole, No. 1,274,572, ;Ai1g1ist 6, 1918, the extratzkey in=the ioole' 'patentlbeing n'ume beredlfi in Figifi-thereofi-mlt is-to be fur ther noted that saidtkey is provided with an interlock,which, permitsiits. operation only whencthe-tiitallizeri.or idecirnal carriage "has reachd' azlpi'detrmiliethposifierrpand :this inte'rlnck can beaa'dvantageouslyzemployed to lock the star printing key so that saidzkey can ibenoper'ated; only in: the isub-units place Gifthe totalizerrr .j fl-sfini .5 :r We have Efouind it advantageous rtoi make the prongQO of the 00mb 18- engaging; the gear wheel. 16 'in the units order slightly longer than ithe other prongsllwhich' ,:engage the gear wheel 16in thehigher orderi This is 'for-the"purpose .-of throwingthe, entire loadofthe spring; 21 upon the wheel in the units-order, since in thiszevent the friction due to the spring 21rwill be exerted only on the units wheel, ahd since-the unitsiwheel-- is never moved-through atprooess of; carrying, there will I always be available-the power of the master 'wheel 61' as transmitted through the intermediate gears 12 and 14 to 'movethe wheel 15 inthe units orderfi As a matter of experience we have. found that the-friction of the comb18 'o n the wheel 16 of the totalizer is immateriaL'since Ithe camvmay rest 110 on anyof the gears lfiwithout interfering with the: operation'of the totalizer'. However\ we consider the' arrangement of iinsur ing*that the cam '18 be supported'by the gear wheel 16 0f the units order to befpre'f- 115 erable. -It-isnl'so to beunderstood :that the short teeth 17 aresuch a length as to not interfere with the driving 'actiorrof the gear 1 1. This feature has been thoroughly explained in" the .eo nding application of 120 Arthur F. Poole erial No. 757934, filed March 31, 1913, 'nowrPatent No; 1,311,710, dated July 29, 1919, to which reference may be had for further description of the action of the comb 18 on the short teeth 17.

Many improvements and variations may be made in the precise mechanism herein de scribed without departing from the spirit Of our invention, since we claim:

1. In a calculating machine, the combina- 130 saidkey and said totalizer to permit a par (ion of a totaiizer, a zero determining device in said totalizer, a key adapted to print a characteristic mark, and mechanism connecting said/key with said totalizer to permita partial operation sufficient to print said 1na1 k, but to prevent a complete operation of said key in the-event said totalizer does not stand at'zero;

2;"In acalculating machine, the combination of a totalize1, a key to print a char acteristiomark indicativeof a. zero condi} tion on said'totah zer, and means connecting t'ial stroke'sufiicient to prilit'said mark, but to-prevent a' full stroke'of said key. in the irent-rsaid totalizer.-does not stand at zero?- In'la calculating .ina chine', the combination at a key adapted to print a character: istic @markf means to compel a complete stroke of -s'aid key when once a stroke has been initiated, a totalizer, a'ndmean-con' netingi said key'an'd said totali'zer to; prev'eiit 53.. complete st'roke of: said key in the evntqthat -said totalizer does not stand at zero. t 4x'1'n 'a: calculating. machine, the combination of a totalizer, a key adapted to standing mi 1 said 'totalizr 'at 'zero, a full stroke mechanism associated with said key, saidrfull stroke mechanism being adapted to-"Be in'oneposition upon'the downstroke of'said'key and in another position on the up strdkebfsaidkey, and bein changed from' one-position 'to another uring the cycldof 'thestroke of said key, and means istic mark, and a mechanism connecting said key with .said totalizcr to prevent the travel of said-traveling member in the event that said 'to'talizer does not stand at zero at the time when said special key is operated.

6.v In= a-calculatingand printing machine, the combination with a totalizer and means for operating the same, of a key for printing a characteristic'mark, connections from said key into the'totalizer, and a. latch in said rintj 'ai rcharacteristic -mark. indicative 0 "the tma'iizor to permit or prevent the return motion of said hey depending on the nditinn of the totalizer.

7. In a calculating and printing machine, the combination with a totalizer, key actuated means for printing numbers and adding them into said'totalizer' andfor printing the total and substraetingzitfrom said :totalizer, locking devices'operatedby said key actuated means, and 'ineansscontrolledby said totalizer to prevents-said lockin'g means from returnlng to unlocking posit-ionat a certain key stroke in case the totalizer does not stand at zero. a

8. In a calculating machine, the-'coinbi- 1 nation with a totalizer and means fOlfiZOPGl" sting the same, of a handwoperated device vandmeans" controlled by the state of the totalizer for preventingsthe return of said device to normal xposition after an f oper ation thereof in case said.- :totaliz'er does not stand at zero; ens-i '9. In aicalculatingr-malchine, the combi-' nation with a traveling carriage,- atotalizer,

and means for'o e'ratifig said totalizer, bfza hand operated: evice, meanscontroiled by the state of thetotalizer for preventing the return of said device to :normabposxtiofl after an operation.-thereo,f-.in case said -'totalizer does .not' stand at zero, and"means forf assnrin g that said device was operated when said carriage stood !in.--aL -certamp0si tion. E .-v

- 10. In a calculating machine the combination with artotalizer and means'for-actu sting the same, of a key for printing achar-i a-rtcrist-ie mark wlien'- said'.totalizer stands at zero and also whenqsaiditotalizerzdoes not stand at zem,' and means-wherebyan operation ofsaid key locksa'n essential part of the machine in'case'sai'dtotalizer does not stand at zero at the timewhen said key is operated. v I" 11 In a calculating machine, the combination with a totalizer and means -for. actu sting the same, of a device which can be operated by hand when saidtotalizer standsat zero and also when said totalizer does not stand at'zero, and means whereby an operation of said device immediatelylocks an essential part of the machine-in'casethe totalizer did not stand at zero when said device was operated. 7 1

In witness whereof we have hereunto subscribed our names.

HYMAN GOLBER, I ARTHUR F. POOLE.-

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