US882614A - Calculating-machine. - Google Patents

Calculating-machine. Download PDF

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US882614A
US882614A US34539806A US1906345398A US882614A US 882614 A US882614 A US 882614A US 34539806 A US34539806 A US 34539806A US 1906345398 A US1906345398 A US 1906345398A US 882614 A US882614 A US 882614A
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pinion
shaft
carrier
key
machine
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US34539806A
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Carl M Bernegau
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Keuffel and Esser Co
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Keuffel and Esser Co
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Priority to US34539806A priority Critical patent/US882614A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06CDIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C7/00Input mechanisms
    • G06C7/02Keyboards
    • G06C7/08Keyboards with one set of keys for all denominations, e.g. ten-key board

Description

No. 882,614. PATENTE? MAR. mi, lQOL 4C, Ma BERNEGR ALCULLTNG MAHT-NE,
APPLICATION FILED Nov. 190s.
' s smi-iiisvsmlm 1.
/Attes '6am-7n @im am., Inven'or: www ew. by www @M v a af-ffy.
PATENTE?) MAR. 24, 1908.
C. M. BBRNEGAU,
CALGULTNG MAHINE.
APEL-Ummm MLB@ Nov` 27, 1906.
5 SHEETS-SHIJBT 3,
i murmsuuu uu PATENTED MAIL-24, 190@x C. M. BBRNBGAU.
GALOULATNG MMHMBI APPLICATION FILED NOV. 27, 1906.
5 SHEETS-SHEET m.. 882,614.. www@ MAR 1908.
G. M. BBRNEGAU.
CALOULATNG MACK-HNR APPLICATION mmm Nov. 27, 1906.'
-UNiTED sTArns PALrENT OFFICE.
CARL M'. BllR'N-l-GAL?. OF llOlUKlfN. NEW JERSY, ASSIGNOR THE KEUFFEL d; ESSER i TOM'PANX, OF llOliKlii. NEW JERSEY, A CORPORATION OF NEW JERSEY.
CALCULA'ING-MA CHINE I To :',ZZ whom, it 'may concern:
slidable pinion vof the machine Be it known that i, Cain. M". BERNEGA'U, a
citizen of the United States, residing at. Hoboken, in the county of .Hudson and State of New Jersey, have invented certain new and useful improvements in Calculating- Machines, 'of which the following is a speci-v fication.
This invention relates to a certain class of calculating machines, such, for. instance, as that forming the subject matter ot' United States patent to Alexander Rechnitzer, No. 809,075, dated January 2, 1906, and that forming the subject matter of French patent to Thomas, numbered 138,912 and dated Sept. 29, 1880, in which there are a series of drums or barrels actuated 4simultaneously by hand or power, through the medium of a shaft having a bevel gear engaging with a similar gear on the shaft of each drum. 1n the patented machines each drum has a series of nine teeth of graduated len th so that a pinion slidable on a parallel sha t may be located so as to engage with any number of the teeth of the drum during each revolution thereof to govern the extent of rotation of the shaft carrying the pinion. The slid-- able pinion is attached to a button pro`ect ing downward from the top or face o machine through a graduated slot, the position of the button andV consequently of the being indicated, on the top by a pointer on the button cooperating with the numbers (from 0 to 9) on the side of the graduated slot in said top. Thus, if a button indicator points to say the numeral 'Z at the sides of one of the graduated slots, the slidable pinion will be in osition to be engaged with seven of the teet of the drum below it, and the shaft carrying the slidable pinion will be rotated the distance of seven teeth during each complete rotation of the drum. -o
The shaft upon which the slidable'pinion is mounted is connected with and actuates the calculating mechanism so that the extentl of operation of the calculating mechanism is governed. by the position of the button in the graduated slot in the top of the machine, there being a drum, slidable gear, graduated slot, and button for each digit of the number being used in the operation of the machine;
In the practical operation of machines of this class, the slidable button arrangement has been found to be objectionable to some Specification of Letters Patent.
Application led November 27, 1906. Serial No. 345,398.
the
Patented March 24, 1908.
extent. ,lnsettin'g up a lnumber bymeans of these slides there is a liability to over-run,
or pass by, the proper number on the side. ot the graduated slot causing at timesecon#v siderable annoyance and loss of time in correctly setting the slide. At present it is particularly necessary to examine the posi' tion `ol'v'each slide after ithas been set in order to be sure that no accidental displacement has occurred. There is also a liability of the sleeve of the operator catching on such a 'slidable button without his knowledge in moving the hand and arni over the top of the machine, and thus unintentionallyset,
ting up a number where none is desired to be enumerated, or ol disarrangiiig a button already set and thus changing an item already enumerated in either case, the result being an operation upon a wrong number and a wrong'result. It is essential that all liability to such eiror be obi-'iatedin order that thel machine is reliable in result.
lt is the object ofthe present invention to remedy the defects now existing in machines of tlie class described and with this object in View I provide such machines with 'keyboards and keys instead of the graduated slots and sliding buttons.
This invention consists therefore in the improved construction,` arrangement and 'combination of parts hereinafter l'ully'described and afterwardsspecifically pointed.
out in theA claims. I
ln order to enable others skilled in the art to make and use the invention, l have illus- 'trated it in the accompanying drawings in which Figure 1 is a plan view illustrating thoap plication oi my invention to a machine of the echnitzer class, only tivo dcnoi'ninational series of kevs being shown, and theA irrcle* 1. t) vant partsoeing omitted, 141g. s is a front yelevation oi'cthe parts shown in Fig. 'l back of the vertical "plane onthe line 2--2 in Fig. 1,.
someI parts in front of this plane being also shown. Fig. is a plan View of the same parts below the plane of the line 3---3 in Fig. 2. Fig. 4 is a vertical section on the plane of the line 4--4 in Fig. 1 on an enlarged scale, sonic parts being shown in elevation and some being brokerl away to show concealed parts, Fig. 5 is a perspective vieiv'of the mechanism for moving the slidable gear above 'referred to, and Fig. 6 is a detail plan showing the connection between the pinion f shaft of my improved key and the numeral v Wheels of the patented mechanism` top of the stationary portion of the machine :able bearings 12, 12, in the frame of thema- `c ine.
,fjvith/each denominational series of cys on 4apertured in polygonaloutline in cross section l and the corresponding form of the aperturev Referring to the drawings, 10 indicates the in Which at a convenient lace there is a slot through which projects t e startinglever of the machine. This starting lever is the means employed to control the operations of addition, subtraction, multiplication and division as is fully explained in the Hnited States patent to Rechnitzer above referred to. The machine is also provided, as is eX- plained in that patent, 'with a. sliding carriage which carmes'the calculating mechanism. Theseparts form no part of my invention and are therefore not illustrated in the drawings. i
A shaft 11 (see Fig. 1) actuated from any. suitablesour'ce of power is supported in suit- It is provided with a number of beveled gears 13, 13, one gear c 'orres onding the key board andzeach cured to the shaft 11. i p
A series of drurns14, 14, (see Fig. 4) are' mounted on shafts 15,- 15, at pro er ,intervals along the machine, one drum ein' provided for each denominational series o keys on the-key board. -Each of said` shafts is. provided with..a beveledear 1,6 which. is adapted to engageI with. t e corres onding'ff gears. 13,. 13, on the shaft 11 whe eby the* drums 14, 14,. are continuousl `rotatedsp long as the shaftiis actuatedq heseg'drums 14, 14, are each provided with nine teeth, 17, 17, of progressivelyfincreasing length form. ing in eect muti ted ears (most clearlyl shown in Fig-,5), one vtoot 4correspondingon said drum to each of the digits 1n eachl de nominational series. The shaft 11 is adapt-4 ed to be continuously. rotated when vonce stlarteld until its necessary revolutionis comete p Mounted in convenient proximit -to thel mutilated gears, are numeral Wheel s afts 18, 18, (see Figs. 3 and 6) one foreach drum,l14, supported to rotate in suitable hearings 19 and 20 formed i the framework of the machine. Each shaft is made preferabl of prismatic, form along that ortion o its ength opposite the mutilate gear and between these bearings 19 and/20 and carries a slidable pinion 22 (best seen in Fig. 5) which is gear-beingrigidly seto fit over the prismatic section of the shaft and is adapted to slide freely thereon, but which by reason of the prismatic form ofthe shaft in the inion must, When rotated, communicate t e motion of the pinion to the shaft.
Each one of the slidable pinions is pro-l vided With means whereby 1t may be slid along the shaft comprising ahub 23 (F1 and having an annular flange 24 adapted together with the lateral surface of the pinion l22 to engag with a carrier 25 b the movement of- W 'ch the pinion'is sli The carrier 25 is moved in one direction under the tension of a spring 26 secured to it and to a collar or pest n27 -fixed to a rod 28 suitably mounted in the frame of the-machine and alon which the carrier is adapted to move. In t e other direction` the carrier is positively moved. back to its original osltion by` mechanism hereinafter describe The carrler com rises a guiding sleeve 29 adapted to encircle t e rod 28 so that the carrier may be moved freely on said rod Without danger o oflateral displacement or vibration; a lower.
spectively, anda arranged in staggered positions in order to'economize space across the ,top of the machine. Each key is provided wlth a de ending stem 52 adapted to be reciprocate in a 'guide' tube 53 and provided q@with a retracting spring 54 arranged be- ',tveen the finger tip and the' top of the guid- Iingtube. Eachke isalso provided at its ,lower extrgmitywit a foot 55, having toes ,Vfirrngbetween them and thebotto'm of *the foot a' passage .Way 57 Aadapted taper# mit .Oft-he passage of the uI)PI"-.Ir1ember 31 of the carrier25. V The foot is also provided externally with, grooves 58, `58, (speeliigf)A which serve as'guide Ways to'coperate with` i la stationa ide 59 rovided with 'guide ribs 60, arid vgvuhich guii'le isfsecured tothe top 1() of. the machine. By this means when the key-is de ressedits foot iscaused to inove withoutl pr'pler vertical plane.
ateral displacement and in a l e upper projecting-member 31 of the i carri/er 25 is provided with lateral fingers' 32 `(Figs..4 vand 5") adapted. to engage with `the toes 56, 56, of the key stems. It is also apertured at 33 to permit of the assage of a U-shapedlatch bar 40 (Fig. 4i)
the guidef) and which passes through all ofthe passage Ways 57 o the key stems of the entire denominational series'. ,The latch bar is provided with a shoulder 4l which is adapted ,to enga e the up er member 31 of the carrier 25 to `old the lhtter in its initial position, and constitutes a lock'or latch'for that purpose. A-spring 42 (see Figs. 4 and 5) ris secured to the latch bar-40 and to the 5) adapted loosely to'fmbrace theshat b 4 which is. pivoted at each end tol theextremities' of f ..90 linger tips -5-1 numbered rom 1 to 9 re frame of the machine and serves to retract this bar to. position after its depression,
which occursthrough contact with the foot 'of the particular key which has been'y depressed intlie enumeration of an item upon thekey board. 1
The mechanism by means. of which the carriers and slidable pinions are restored to l a restoring io their-initial positions (see Fig. 3) comprises ar 61 suitably interrupted or grooved at 62', 62, so as not to interfere with other stationary (parts of the mechanism and tion ofy the items set up ontlie key board.
. 2 and' 3;
The means ein loyed preferably to actu ate the restoring xhar is best shown in figs. In the illustrations, the bar 61- is shown rovided ,Wi/th suitable lugs 610, 610,
interna ly threaded to engage with threaded shafts 63, 63, suitably nounted in hearings in the frame of the machine and on the eX- tremities of which shafts are rigidly secured pinions 64, 64, adapted to n tesh with a spur gear 65 mounted on a shaft 66 provided with a "ro'ecting handle 67. a oliow hub 68 inside of Whichlis arranger'l a coiled spring 69; one end of which is sef cured to the shaft 66 and the other end of which is secured to a pin 70 fastened in the framey of the machine. This spring serves to retract to position the spur gear after it has been rotated by means of the handle.
In order to simplify the description, I have shown but two of the denominational series of keys in the key board. These are, however suiiicient` to illustrate the construction and mode of operation of my invention. It Will ofcourse be understood that by increasing the number of denon'zinational series I corres ondingly increase the capacity of the mac ine, the other instrunieiitalities being made accordingly.
The numeral wheels of the Reclinitzer inachine are mountedibeneath the sliding carriage (not shown). They'jeoinprise wheels 70 mounted on a shaft 71 which also carries gear Wheels 72 connected hy trains of geen' ing 73 viith the kshaft 18 (liest shown in Fig. 6) andfit will be understood that the purpose of my invention: is, hy the4 depression of a key on the key board, to move the slidalle lpinion of its denominational series to such' a osition that the shaft l l, when rotated, shall, throughthe medium of the drum 14 and its gearing, give a proper number of turns to the shaft 18 to actuate the numeral u heels to a proper degree.
The operation of the mechanism above described is as follows: When it is desired to set up an item on't'he key board, the l'eys representing that item are depressed, one key in each denominational seriescorresponding This spurl gear has to the digits of the, item to he enumerated. b. lake, for instance, the denominational series of ke s show-n iii end elevation in Fio. l and suppose the key carrying the digit l and which projects furthest shove the top 10 of the machine is the one selected. 'lhe depression of thekey tip 51 moves downwardly the key stein and its footl55. This foot is thus brought into contact ith the upper suri face of the latch l ar 40 and'depressing the latter removes its lug 41 from contact with the upper meint` er 31 of the carrier 25. This carrier, under the influence` of the energy stored in the spring 26, moves toward the left as shown in Fig. 4, the aperture 33 perinitting the carrier to pass along the latch bai' I 40 until its upper meml er 31 comes into contact sith the ,side of the foot 55 of the key which has been depressed, `when, of course, it stops. This movement also brings the fingers 32 into position alove the toes .56 of the foot 55 and vprevents any upward movement of the key stem when the operator ceases to press dorme` ard upon the key tip.
The carrier, as has leen seen, has been brought toviest against the side of the depressed key stem and the parts are so ad`-, justed that the slidable-piiiion uhich has l'eeii moved vvith the carrier 25 v-:ill be lrought opposite the longest tooth on the drum 14. When the actuating lever of the machine is operated and the drum 14 is caused to be rotated, this tooth is brought I into' mesh sith-the pinion 22 and moves it andits shaft 1l one step, which step is of such a length that when the motionof the shaft 18 is,vthrough the gearing 73, coininuf .nicated to the numeral Wheel'70, the digit 1 on that wheel is moved to proper position vi ith respect to the other mechanism ofthe inachine in the same manner as though, in the Reclinitzer patented machine, its slidable button had heen moved along its slot to a position opposite the figure l and the parts had lz een )roperly actuated. `Assuming that the calcu ation desired then performed upon the machine and the operator wishes to rrestore the keys to their initial positions, the
handle 67 is, then rotated to cause the shaft 66 andcountershafts 63,63, to revolve. This movement actuates vthe restoring bar 60 in a rearward direction or to the right, when the parts are arranged as shovtn in Fig. 4 and as the bar comes into -contact Withthe lower projecting member 30 of the carrier 21' (and 'with all the either carriers and in'ions of the saine denominational series which havebeen similarly moved into positions in contact with the keysy of said series which have been depressed) it moves this pinion and. its carrier 25 hack to'their priginal positions charging the spring 26 with sufficient energy again to retract the carrier; when desired, and seating the luo 41 of the latch 40 against the carrier 25 under the inliiience of the spring 42.4 .Isf
one of the other keys, in the same series, had
lteen depressed, for instance, the one displaying the digit 9 and which is 'at the other end ofthe series from that carrying the digit l then the carrier would slide along its rod and through all of the passage ways 57 of thc keys which had not been' depress d, During such movement the lingers 32 pass Er-eneath the toes 56 of all oi the keyA stems until they reach the toes of the foot of the key 9 which had been depressed, when, of course, the ngers would be above such toes. The carrier thusmoves the slidable pinion Z2 to a position under the key 9 and this pinion would then be'o posite the shortest one of the teeth 17 on tlli)J drum 14. When the o erating lever of the machine is moved and t re drum 14 rotated, the teeth of the pinion are brought into mesh in turn with every tooth on the drum, namely, nine,- and would thus causethe numeral 9 to be set up on the numeral wheel at the proper position. The sl-idable pinion in such case is of course restored to its initial position by the actuation of the handle .67 as before.
It will be noted that after one keyrof any denominational series has been depressed and the pinion carrier has engaged therewith, the
. 'depression of anyv other key inthe same denolninational series has no effect on the digit sov set, unless and until the/,parts are all re stored te their initial positions.
' 1What I cla-im as new is Y l. In a Acalculating machine oi the class described, the combination with depressible keys, numeral wheels, a'drum, mutilated gears thereon, and a shaft for. actuating the numeral wheels, of means for gearing the `drum with said shaft, normally held inoperative, and means actuated by depressing the' keys for releasing and permitting said gearingmeans to operate;
2. In a'calculating machine of 'the class' described, the combination with numeral wheels, a shaft for actuating them, a drum,
` and aV series of mutilated gears thereon, of'a .4 pinion on the shaft, `means for bringing it lnto mesh with the-mutilated ears, normally -held inoperative, and manna means for releasing and permitting the gearing means to operate.
3.1In' a calculating machine, the combina tion with a row of depressible keys numbered from l to 9 and a drum provided with muti# lated gears, cfa shaft between the drum and the keys, a slidable, pinion on said. shaft, andv aconnection between the keys and the-pinion wherebyth'e lat'terfg'rniyv be moved'into line 1with the mutilated gears by depressing the 4; 'In a' ealculating-rachinacomprising depressible keys, numeral wheels and drums each havingvmutilalted gears', the `combina- V- vtion therewith of. a shaft, for actuating the numeral wheels, sli'dable pinions adapted vto lated gears, of a shalt between the drum and the keys. a slidable pinion on said shaft, and a connection between the keys and the pinion whereby 4the latter may be moved into line with a predetermined tooth on the mutilated gear upon the depression ofthe proper key.
6. ln a calculating machine, the combina tion with a row of depressible keys numbered ,j
from I to 9 and a drum provided with mul ilated gears 'having 'aserics of teeth of pro gressively increasing length, of a shalt between the drum and the keys, a slidable pinion on said sha-lt and a connection between the keys and the pinion, whereby the latter may be moved into line with a predetermined tooth on the mutilated gear upon the depression of the proper key.
7. In a calculating machine of the class described, the combination with depressible keys arranged in denominational series, nu
meral wheels, a drum, and a. shaft for actuatinff the numeral wheels, of a slidable pinion on tilie shaft and. means actuated upon the depression of the keys for moving the pinion into cooperative position with the drum, said means comprising a latch bareommon to the series ofv keys 'connecting the. key stems and theslidable pinion.
8. In a calculating machine of the character described, the combination with depressible keys, numeral wheels, la drum, and-a shaft for actuating the numeral wheels, ofmutilated gears on the drums spaced apart, a slidahle pinion on the shaft normally out of cooperative position opposite the spaces between the mutilated gears, and means for slidingthe pinion into line with the proper tooth of the mutilated gears where. certain key is depressed.
9. In a calcul-ating machine nl die character described, the combination with depressible keys, numeral wheels, a drum, and a shaft for actuatingthc rumeni wheels, of mutilated gears on the drum', a slidable pinion o n theshaft normally out of line with the mutilated gears, and automatically operating means for shifting' the pinion into line with the mutilated'gears brought into actionV upon the depression of the keys.
10. In a calculating machine, of the class described, com 'rising keys, numeral Wheels, a drum providled with mutilated gears, a shaft' for actuating the ,numeral Wheels and a slidable pinion on the shaft adapted when lin proper position to mesh with the gears on the drum, means for moving the slidabl pinion to proper cooperative position comprising a. carrier for the pinion, a latch adapted tvhold causing the gearing means for releasing the gearing means,
vfor restoring the pinion rangpd'in series, and asli able pinion adapte. ed t rough intermediate mechanism to actu ate said numeral Wheels, means formoving.
the pinions to proper position to engage with said mechanism, comprising a carrier for the pinion, a s ring .under tension secured thereto, a late i holding the'carrier stationary', .means for releasing the latch through the depression of any of the keys and a stop for the carrier secured to the key de ressed.
12. In a calculating macliine of the class described the combination with depressible keys, numeral Wheels, a drum and a shaft for actuatin the' numeral Wheels, of means for gearing iiie drum with said shaft, means for 'to operate upon the depression of the keys, and other means for restoring the gearing means to their initial positions. .13. In acalculating machine oi the class described the combination with a shaft for actuating the numeral Wheels and a drinn having a serios of mutilated gears, of a pinion, means for normally holding it out of mes'n 'with lsaid gears, gearing i'neans 'for bringing said pinion into mesh with the mutilated gears, manually operable means and means to its initial position. 14. In a calcu atingmachine of the class described; the combination with a shaft for actuating" the numeral wheels, anda drinn having a series of mutilated gears, of a pinion, means for normally holding it out o'l mesh with said gears, gearing means V'for bringing saidpinion into mesh with the muti ated gears, 'manually operable means for releasing said/gearing means, and means Vfor restoring the pinion to its initial position, comprising arestoring bar adapted to be manually operated.v
15. In a calculating machine, comprising keys, numeral wheels and drums each having mutilated gears, the'combination therewith of a shaft for actuating the numeral wheels, slidable pinions adapted to actuatc said Shaft, means actuated upon the depression oi the keys for shifting said pinions into. line with' said mutilated comprising a manuallgy47 operated bar.
16. In a calculating machine, comprising numeral wheels, and depressiblc keys arranged in series and a sl'idable pinion adapted through intermediate mechanism. to actu ate said numeral Wheels, means for moving the pinions to proper position to engage with 4said mechanism, com rising a carrier or the pinion, a spring un er tension acting thereon, a
, gears, and means for `restoring the pinions t, their initial position,
latch holding the lextending along the series of keys and adapted. Lo release said latch anda stop secured to each key and adapted to'beintf-.rposed in the path lol' the carrier` When said key is depressed.
17. ln a csloulating machine, comprising numeral wheels and keys arranged in series and a slidable pinion, adapted through intermediate mechanism, to actuate the said numeral Wheels, means for movingl the pinions to proper positionto 'engage with said mech anisni and means for restoring the pinionto its initial position after such engagement.
18. In a calculating machine, Vcomprising numeral l'Wheels and depressible lkeys arranged in series and a slidable'pinion adapted through intermediate mechanism to actuate said numeral wheels, means for moving the pinion to proper position to engage with said mechanism, .comprising al'carrier for the pinion, a s ring to, a latci holding the carrier stationary, means for releasin the latch through the depression. of any o thekeys, a stop for the carrier secured to the key means for restoring all oi the parts to their initial position after such engagement.`
19. In ya calculating machine, comprising numeral wheels and keys arranged iii series and a slidable pinion adapted through intermediate `niechanism to actuate said numeral wheels, means ior n'ioving the pinion to proper position to engage with said mechanism and means for restoring the pinion to 'its initial position .after such engagement and means for automatically replacing the latch in its initial position.
20., ln a calculating machine comprising numeral wheels and depressible keys arranged in series, anda slidable pinion adapte ed, through intermediatemechanism, to actuate said numeral wheels, means for moving the pinion to proper position to engage with said. mechanism, con'iprising a carrier'for the pinion, a springunder tension secured thereto, a latch' means for vreleasing the latch through the depression of any of the keys and a stop for the carrier secured to the key depressed and holding it lin said position during said engagement.
21. in a calculating machine, comprising numeral Wheels and depressihle keys ai# ranged in series, and a slidable pinion adaptw ed, through intermediate mechanism, to ac tuate said numeral wheels, means for moving the pinion to proper position to engage With said in cchanisin, comprising a carrier for the pinion, a )ring under tension secured thereto, a latch holdingr the carrier stationary, means for releasing the 'latch through the depression of any oi the keys and a stop for the carrier secured to the key depressed and carrier stationary, a liarr depressed and under tension secured thereholding the carrier stationary,
20 engage With the carrier to keep :the vreydel holding it in said position during said engagement and restoring it to its initial posi tion after such engagement.
22. In a calculating machine, comprising numeral Wheels and de ressible keys arranged in series and a slifable pinion adapted throu'hl intermediate tuate said numeral Wheels, means for moving the pinion to proper position to engage with said mechanism, comprising a carrier for the pinion, a passage in each key through which the carrier may pass, a'latch holding the carrier stationary, means for moving th'e carrier and a stop on the key to determine' the position of the carrier when a key is. depressed.
23. In a calculatin machine, the combination with a de ressi le numeral key and a pinion carrier, o toes on the key ada ted to mechanism to ac-v pressed While the carrier is inlengagement With the key. I t
24. In a calculating machine the combination of numeral Wheelsv andde ressible keys arranged'in 'series and a slidable pinion adapted through intermediate mechanism to actuate said numeral Wheels when brought into nenfagenn-snt with any one key 1n the series W 'ch has-been depressed, and means adapted to prevent any change in the digit corresponding to th'e'depressed key, by the subsequent depression of any other key of' the same series.
US34539806A 1906-11-27 1906-11-27 Calculating-machine. Expired - Lifetime US882614A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756933A (en) * 1956-07-31 Gangx z

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756933A (en) * 1956-07-31 Gangx z

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