US1274365A - Combined type-writing and computing machine. - Google Patents

Description

APPLICATION FILED JULY 2. I912.

Patented Aug. 6, 1918.

4 SHEETSSHEET I.

W. E BARNARD;

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED JULY 2. 1912.

1 ,274:,365 Patented Aug. 6, 1918.

4SHEETSSHEE 2.

W. E. BARNARD.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED JULY 2. I912.

Patented Aug. 6, 1918.

4 SHEETS-SHEET 3.

W. E. BARNARD.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED JULY 2. I912.

1,274,365. Patented Aug. 6, 1918.

4 SHEETSSHEET 4 UNITED sTATEs PATENT, OFFICE.

WALTER E. BARNARD, 0F HARTFORD, CoNNECTICur, .ASSIGNOR, BY :uEsNE Assum- MENTS, r0 UNDERWOOD COMPUTING MACHINE COMPANY, OF NEW YORK, N. Y., A

CORPORATION OF NEW YORK.

ii'?c1sr1a INE1 TYPE-WRITING. AND COMPUTING MACHINE.

Specification of Letters Patent.

P-atented Aug. 6, 1918.

Application filed July 2, 1912. SerialNo. 707,153.

To all whom it may concern:

I Be it known that I, WALTER E. BARNARD, a-citizen ofthe United States, residing in Hartford, in the county of Hartford and vState of Connecticut, have invented certain new and useful Improvements in Combined Type-Writin and Computing Machines, of which the 0 lowing is a specification.

This invention relates to computing machines, and. particularly to those in which for connecting the keys of the typewriter to a setof power driven. mutilated gears,

, whereby the keys may selectively connect Y the master wheel to any of said gears.

One of the features of the present invena tion is to improve the connection from the keys to the clutches which controlthegears and also improve the construction an operation-of the clutches themselves. 1

.Another. feature of the invention resides in guarding against premature advance movement of the carriage before the master wheel completes its rotation.- .By meafhs of av detent associated with the clutch mechanism,

' the escapement wheel of the typewriter car.-'

riage may be automatically prevented :from

rotating prior to the completion .ofthe' ro-' tation of the masterjwheel, thus holding the carriage stationary during the computing operation.

Another feature resides in the provision of improved means for disconnecting the keys .from the computing mechanism,

whereby -positive disconnection is assured and liability of error through too rapid action of the computing mechanism is avoided.

Another feature is the provision of im'-' 1 proved means for securing the action of the computing mechanism by the initial portion of the printing strokeof the key of the typewriter, and permitting the key to complete; its printing stroke independently of thie I sociated mechanism'takes part of the ownstmke of the computin mechanism.

inafter appear.

' of the Clutchestaken "numeral key,

In the accompanying drawings, Figure 1 is a side vlew in elevation. Fig.2 is a detail section, showing the relation of one of the clutches and its associated dog when the clutch is not connected to the shaft. i

. 'Fig. 3 is a vertical section through one-of the clutches, taken at right angles to the view shown in Fig. 2.

Fig. 4c is a detail perspective view, showing the means for locking the esca ement wheel until after the computing, mec anism has finished its action.

Fig. 5 is a vertical section taken from front to rear', to show the connection of the numeral keys to the linkages, whereby the' I numeral keys control the operation of the computing mechanism.

Fig. 6 1s a front view 1n elevation, part broken away, to show the underlying struc -ture.

Fig. 7 is a'diagramamtic view, showing a series of sections to illustrate the'set'of mu,

tilated gears with the cams and gearsdriven thereby.

Fig. 8 is a detail perspective view, showing. the linkages from the numeraLkeys to.

theclutc'h'es on the-drive shaft.

Fig. '9 is a slightly enlarged detail view of certain parts shown in Figs. 2 and '6, showing one of the dogs moved forward to its releasing position, so'that the clutch is connected in driving relation with the shaft,

and so that the universal bar is just about to release the actuated trip from its tripper. I v Fig. 10 is a spread perspective view, show-f ing theparts of one of the clutches separha'ted -one from another to disclose more clearlytheir structure. 96

' Fig. his a vertical section through one a ight angles tothe view shown in Fig, 3; a 1

"Fi 12 is a fragmentary vertical section,

show ng in'full lines the stem of one of the numeral keys partlydepressed to actuate its associated'bell crank, and in dotted lines- N fully depressed, illustrating the. fact that v the actuation of the bell crank and thev aslace solely dur. ing the initial connected to a clutch-controlling tripper Alphabet keys 1 and numeral keys 2 depress levers 3 to vibrate bell cranks 4:, which swing type bars 5 up against a platen 6. The latter is mounted in a carriage 7 propelled by .the usual spring barrel, (not shown). The carriage has a rack 8 to mesh with a pinion 9, which is connected to an escapement wheel 10. Dogs 11, 12 control the movements of said escapement wheel. Each type bar has a heel 13, so that it may press rearwardly a universal bar 14, which opermenace rock shaft is thus caused to 'pull the link 22 toward the left at Fig. 8, together with the stem or riser, 26 thereon, and through the associated link 27 to rock the tripper' arm 28, whereby the trip 30, together with the dog 31, is drawn to the left at Fig. 7, to release the tongue 32 and'thereby permit the clutch to fclose, so that the clutch will be ates the dogs 11, 12, whereby letter feeding )given a revolution by the power shaft 33.

movements of the carriage are caused at the type strokes, as is usual in an Underwood front-strike typewriting machine.

From the numeral keys 2 depend stems 15, guided at their lower. ends in a fixed comb 16. Each of these key stems is designed to control the operation of a clutch-closing device of the computing mechanism, there b e ing one clutch for each numeral key, Separate trains of -movement transmitting mechanism extend from the stems 15 to the clutches. Considering one of these trains, a bell crank having an upright arm 17 and rearwardly extending arm 18, is loosely mounted below its associated stem 15. Arm

1'8 depresses an arm 19 fixed on the forward end of a horizontal rock shaft 20, so as to swing an upright arm 21 also provided on the rock shaft. A transverse link 22 has a pin 23, engaged by'said upright arm 21,- to drive the link endwise. Said link is supported by idle links 241, 25, and has a stem 26-. By means of a link 27, said stem 26 is arm 28, pivoted upon a fixed rod 29. There is an array of said tripper arms extending from front to rear, one arm for each numeralkey. The tripper arm in each instance is adapted to operate a clutch. controller, comprising a trip 30 and a latch or dog 31 ivot-ally connected to said latch at 57. Said dog is normally in engagement with a tooth ortOngue' 32 provided on the clutch, to restrain the clutch from closing. 7

The arm 28 pulls the dog 31 away, to release 32 and permit the clutch to close. Each latch or "dog. 31 is slidably supported at one end. .(see Fig. 9) in anopenin-g 31 in a. suporting member secured. to the machine ram'e, and at a point somewhat removed from. itsother end by the spring 58. Each dog is also supported, in part, by the springpressed trip 30, which rests upon the upper end of the .tripper-arm 28. Said dogs are maintained .in their proper spaced relation a co'mbplate 31". It is to be understood that there is one of'these clutches andoneof to 9. .Theclutches are loosely mounted on these trains for each numeral key from 1 a power-driven shaft 33', which may be constantly revolving.

When a key stem 15 is depressed, the associated bell crank 17, 18, is rocked inclock- *mally stationary cup-likeemember48 (fixed With the clutches are associated mutilated gears 34, seen at Fig. 7, one gear to each clutch. These gears are designed to engage pinions 35, which are all fixed upon a horizontal shaft 36, Fig. 1, which has a bevel pinion 37 to mesh with a bevel pinion 3 8 upon a vertical drive shaft 39, carrying at kin sof master wheels, which may be otherwise connected to be operated.

When'any numeral key is depressed,.its corresponding rotary clutch closes, and

thereby connects the associated mutilated gear with the power shaft 33 so that said gear may engage the associated pinion 35, and rotate the pinion 5 shaft 36 thus turning the describedv connections to rotate the master wheel 43 to an extent dependent'upon the key operated.

It will be seen at Fig. 7, that the first mutilated gear has only one tooth corresponding to numeral key 1 and is marked 1, the second gear has two teeth, corresponding to numeral key 2, and so on, the last gear in' the series-having nine teeth. Each of the pinions 35 has ten teeth; and the gears are adapted to turn the pinions either oneor more full tenths of a revolution, de-

pendent upon the number of teeth in the gears; the last gear marked f9, being adapted to turn its pinion through nine-tenths of a revolution, whereby the master wheel'43 is turned sufliciently to cause the active dial wheel 46 to rotate nine points. Thus the depression of any numeral key operates to connect the power shaft 33 to the mutilated gear having the corresponding number of' teeth, whereby said power shaft 33 is. caused to rotate the active dial wheel 46't0 a corresponding extent.

' Each of the clutches may comprise a norto its associated mutilated gear 34) and a roller 49, which may be caused to jam between the saidcup 48 and a hub or boss 50, provided upon the shaft 33, and rotating therewith' The ball or roller 49 runs in a hollow or pocket 51 in the inner side of the cup 48. This pocket is large enough at one end to permit the roller 49 to fit loosely without connecting the cup to the hub. The pocket graduallyfgrows shallow toward its opposite end so that the roller 49 can be jammed between the hub and the cup, forming a clutch connection. The roller or clutch member 49 is shifted by an annular member 52, which surrounds the hub 50 within cup 48, and has a notch 53 within which the ball 49 is confined. Spring 54 constantly tends to force the annular member 52 forward to move the ball 49 to clutch- I closing position in the shallow portion of the pocket 51, so as to jam the ball or roller 49 between the hub 50 and the cup 48, to

cause power to be transmitted from the shaft to the cup 48 and the mutilated gear 34 fixed thereto.

The dog 31 normally holds the clutch open (Fig. 2) by restraining the tongue or projection 32 which extends from the annular member 52 through the cup 48 to a position to be engaged by the dog 31. Since the rollers 49 lie normally in deep portions of the pockets 51, the shaft 33 and hubs 50 are allowed to rotate idly. When any dog 31 is withdrawn, by means of the associated numeral key 2, from the path of the tongue or projection 32, the spring 54 advances the annular member or ring 52 to shift the roller 49 along the 1pocket 51, toclose the clutch, so 4 that the sha 33 may rotate the associated mutilated gear 34, for the purpose already explained.

In the form of the invention illustrated in th drawings, the release of the tongue 32 and the consequent closing of the clutch, occurs near the beginning of the downstroke of the numeral key; and since the shaft 33 may rotate at high speed, it oftentimes happens that said shaft completes a revolution even before the key completes its downstrokc.

In order to avoid a second or spurious revolution of the mutilated gear, however, prior to the release of the key by the finger of the operator, a positively acting automatic (lisconner-tion is effected between the key and the clutch opening dog 31, so that said dog may return to its normal position and arrest the tongue 32 and open the clutch before it is possible for the mutilated gear to make the second revolution. To this end, a universal power driven releasing bar 100 is provided for the trips 30. To operate this bar, each of the mutilated gears 34 is provided with a disk 67 having a cam 68 in position to cnga one of a set of arms 39, all tired,

to a rock shaft 70; so that, when any cam rotates, the shaft 7 0 is rocked. On this rock shaft a bar 100 is supported by arms 101, so as'to be swung upwardly when the shaft rocks, that is, when any of the clutches is closed and rotates the associated cam 68. The bar 100 underlies points which the for ward ends of the trips 30 will occupy when advanced to release the tongue 32 from the latch or dog 31, so that, when the bar 100 is moved upwardly, any trip or pawl 30 which happens to be advanced will be lifted, against the tension of its spring 59, clear of the associated tripper 28; whereby an associated spring 58 will be free to draw the latch or dog 31 backto normal position in the path of the rotating tooth 32. This return movement of the dog31 may even occur before the initial stroke of the tripper arm 28 is completed. The opening of the clutch occurs, therefore, automatically and wholly independently of the release of the fin er key by the operator.

t will be understood, however, that uponrelease of the key, the nose of the pivoted trip 30 will be again snapped over the top of the tripper arm 28 by means of the sprin 59. It will be understood that when the dog 31 intercepts tooth 32, the ring 52 is arrested, and the roller 49 is forced'back into the ,cup 48, thus relieving the jam of hub 50 and cup 48, and allowing the power shaft 33 again to rotate idly.

The disconnection of 31 from 32 permits the clutch device and its gear to rotate rapidly independently of the speed of operation of the key; while the disconnection of 30 from 28 insures that the dog 31 shall return in time enough to intercept the rapidly rotating tongue of the clutch so that the latter is also permitted to rotate at very high speed, regardless of the speed of operation of the finger key.

It will be seen at Fig. 5 that the key stem 15 stands normally close to the arm 17, so thatalmost at the beginning of the downstroke of the key, said stem 15 will engage the arm 17 and rock the latter enough to effect the withdrawal of the dog 31 from the clutch, tongue or tooth 32, so that the clutch is promptly released. The bottom of the stem 15 is beveled at 60 to engage a cam edge 61 offset to one side on the arm 17, for the purpose of camming said arm to theright at Fig. 5 during the early part of the keystroke; the position and shape of the parts permitting the keys 2 to complete their printing strokes while the arm 17 remains stationary, the rear edge of the key stem 15 riding idly down past: said arm. That is to say the computin action is started at the initial part if the down stroke of the numeral key and the coimecting train remains unactuate'i thereby during the rest of the stroke of se typewriter carriage 7 one of the mutilated gears is clutched to the I drive shaft.

One of arms 69 has an extension 71, which rocks, when the shaft 7 0 rocks and is connected to pull a link 72, thereby vibrating a lever 73, which is connected by a thrust link 74 to a dog or detent 75, and moves the latter-from the normal ineii'ective position at Fig. 6 into engagement with, the adjacent tooth of the e'scapement wheel 10 of the typewriter carriage 7, Figs. 4 and 6. As soon as the cam 68 asses the arm 69, the lat ter, together with t e shaft '7 0, extension'71 and dog 5, are returned to normal positions by'a spring 76. The parts may be so proportioned and constructed that this release of the escapement wheel by the dog 7 5 may generally occur before said escapement wheel is released by the dogs 11*, 12 5 but the provision of the dog 75 .will not onl hold the carriage while the master whee is being given a maximum rotation, but will also insure against the stripping of the teeth :t'rom the computing gears, in case of irregular action of the carriage feeding or other mechanism. a

The earns 68 are shown to be of graded sizes corresponding to the number of teeth in the associated mutilated gears; so as to assure the inaction of the carriage during the period the teeth, of the mutilated gears are active. The period will be shortest for the 1? key and cam, and longest for the 9 key and cam.

Ifit is desired-to employ a full stroke mechanism for the numeral keys 2, there may be used a rack 77 attached to the key stem 15, and a pawl 78 pivoted to a mount tion.

79, and having a draw spring 80, whereby it can cooperate with the rack 77 to prevent the same from movin in either direction beforeit has finished its stroke 1n one direc- If desired, locks may also be added for preventing two keys from being operated simultaneously. These locks may be in the form shown in llig. 6 at 81, and 'form an array acrossjthe machine, being individually ivoted at 82 to a part of the framework. Klany of the locks are shown at Fig. 6 in contact, but any, of the extensions 83 on the rack 77 may enter between any pair of locks, and force them apart, thereby closing the spaces'of the locks in the remaining pairs,

so that no other key can descend before the depressed'key rises.

Variations may be resorted to within the scope of the invention, and portions ofthe improvements may be usedwithout others.

Having thus described my invention, "I

claimz 1. The combination with a computing head, of a carriage, a set of numeral keys,

a set of power-driven gears for actuating said computing head variableamounts and each having a number of teeth corresponding to the value of the associated numeral key, means for releasing the gears from the control of the keys, and means controlled 'from said mutilated gears for preventing the movement of said carriage until after said gears have performed their work.

2. The combination with -a computing head, of a carriage, a set of numeral keys, a set of power-driven gears for actuating said computing head'variable amounts and each having a number of teeth corresponding to the value of the associated numeral 'key, means for releasing the gears from the ber of teeth corresponding to the value of the associated numeral key, a. set of cams,

one connected to each of said gears, said cams being of graded magnitudes and corresponding in magnitude to the number of teeth on the associated gear and means operable by any one-ofsaid cams for preventing the movement of saidrcarriage until the teeth of the associated gear'in action have done their work.

4. The combination with a computing head, of a carriage, a set of numeral keys, a set of gears actuated by said numeral keys and adapted to actuate said computing head variable amounts, each of said ears having a number of teeth correspon ing to the value of the associated numeral key, a cam connected to each of said gears, said cams being of graded magnitudes and corresponding magnitude to the number of teeth on the associated gear, arms actuated by said cams, one of said arms having a link connected thereto, an escapement mechanism forsaid carriage, and a detent operatively connected to said link so as to engage a portion of said escapement mechanism to prevent its operation until the action of the active cam has ceased.

,5. In'a computing machine, in combination, a traveling carriage, means including a set of number keys for effecting step-bystep movements thereof, a set of computing wheels, a master actuator therefor, connectmgmeans for eifectlng denomination-selecting changes of relative position between said.

actuator and said wheels in accordance with said step-by-step movements of said car-' riage, operating mechanism for said actuator including valuating means and motive means therefor, means individual to each key and effectiveon depression thereof to initiate selective operation of sald valuating means key has been returnedto its normalposition, means for arresting the moving parts of said, mechanism after a predetermined cycle of movements, and means, controlled by said operated valuating means for preventing a denomination-selecting movement of said carriage during the operation ofsaid actuator by said valuating means. a

6. The combination with a computing head, of aimaster wheel, said computing head and said master wheel having a rela-' tive step-by-step movement, a set of numeral keys, a set of power-driven mutilated gears controlled in their action by said numeral keys to drive said master wheel variable amounts, and each having a number of teeth corresponding to the value of the assoc ated numeral key, means to automatically release eachmutilated gear from its key, and means controlled from said mutilated gears for preventing the relative movement of said computing head and said master wheel while .said mutilated gears are in action. p

7. The combination with a computing head, of a set of numeral keys, a set of mutilated ears fordriving said computing head varia le amounts, each of said mutilated gears havi'nga number of teeth corresponding to the associated numeral key, a continuously driven shaft, a clutch for connecting each of said gears to sa d'shaft, said clutches normally tending to connect said gears in driving relation with said shaft, a'disconnector for preventing the connection of said clutches in driving relation with said shaft, linkages connecting the dividual disconnectors wlth correspond ng numeral keys, whereby said numeral keys I can actuate said disconnectors to release said clutches, and clutch actuated means .for disconnecting any actuated disconnector from its associated linkage, after the associated clutch has been connected to said shaft.

8. The combination with a com uting head, of a set of numeral keys, a set 0 mutihead, of a set of numeral keys, a set 0 lated gears for driving said com uting head variable amounts, each of sai mutilated gears having a number of teeth corresponding to the associated numeral key, a continuously driven shaft, a clutch for connecting each of said gears to said shaft, said clutches normally tending to connect said gears in driving relation with said shaft, a

, universal bar underlying the forward posi-' tion of all of said disconnectors,and being adapted to interrupt the connection between any of said disconnectors and its associated linkage, after the associated gear has been clutched to said shaft.

9. The combination with a computing gears controlled in their action by said numeral keys and connected to drive'said computing head variable amounts, each of said gears having a number of teeth corresponding to the value of the associated numeral key, a continuously driven shaft, a clutch for connecting each of said gears in driven rela tion-with said shaft, a disconnector foreach of said clutches for maintaining them in their unclu tched condition, and linkages extending from said disconnectors to said keys, whereby said keys may control the clutchingof said gearsto said shaft, each of said disconnectors comprising a locking dog and a trip-pivotally connected so that said disconnectors can be operatively disconnected from said keys. V

10. The combination with a "computing head, of amutilated gear for driving said computing head, a clutch for controlling the action of said mutilated gear, a disconnector for holding said clutch normally in its dis connected condition, a numeral key, a linkage from said numeral key to said disconnector, wherebysaid numeral key can actuate sa d disconnector to release said clutch,

means for releasing said disconnector from able by the other arm of said bell crank, a'

rock shaft operated by said last-mentioned arm, a floating link, an arm connecting said rock shaft to said link, a tripper arm connected to said link, a disconnector operable by said tripper arm, said disconnector comprising a dog and a trip pivotallyconnected together, a gear, a constantly driven shaft for said gear, and a clutch connecting sa d gear in driven relation with said shaft, sald clutch having a member normally engaged by said dog to prevent the connection of said ear and said last-mentioned shaft by said 0 utch.

13. In a computing machine, in combina tion, a traveling carriage, means including a set of number keys for effecting step-bystep movements thereof, a set of computing wheels, a master actuator therefor, connecting means for effecting denomination-select ing changes of relative position between said actuator and said wheels in accordance with said step-by-step movements of said carriage, operating mechanism for said actuator including a set of graded valuating members, one for each key, and motive means therefor, means individual to each key and effective on depression thereof to initiate a driving connection from said motive means through a corresponding valuating member to said actuator to, effect a movement thereof corresponding in extent to the number represented by the key deressed, means for automatically disconnecting said keycontrolled-connection-initiating means on initiating such a connection, and

for rendering said means incapable of further affecting the movements of the parts of said mechanism thus called into action until said key has been returned to its normal position, means for arresting the moving parts of said mechanism after a predetermined cycle of movements, and means controlled by the parts of said operating mechanism set in action by any of said keys for preventing a denomination-selecting movement of said carriage during the operation of said actuator thereby.

14. In a computing machine, in combination, a traveling carriage, means including a set of number keys for effecting stepby-step movements thereof, a set of computing wheels, a master actuator therefor, connectactuator and said wheels in accordance with said step-by-step movements of said carriage, operating mechanism for said actuator including a set of graded valuating members, one for each key, and motive means therefor, means individual to each key and effective on depression thereof to initiate a driving connection from said motive means through a corresponding valuating member to said actuator to effect a movement thereof corresponding in extent to the number represented by the key depressed, means for antomatically disconnecting said keycontrolled-connection-initiating means on initiating such a connection, and for rendering said means incapable of further affecting the movements of the parts of said mechanism thus called into action until said key has been'returned to its normal position, means for restoring said key-controlled-connectioninitiating means on the return of said key to its normal \position, means for arresting the moving parts of said mechanism after a predetermined cycle of movements, and means controlled by the parts of said operating mechanism set in action by any of said keys for preventing a denomination-selecting movement of said carriage during the operation of said actuator thereby. I

15. The combination of a source of power, a master wheel or member, a stepped or assorted set of gears, a set of keys, means selectively operatedby the keys for operatively connecting said source of power to said master wheel through any selected one of said gears, means'operable by said source of power for disconnecting the keys from said connecting means and for subsequently restorin the connectionnof the keys, and means fbr automatically disconnecting said master wheel from said source of powe-r.

16. The combination of a stepped or assorted set of gears, a master wheel or member, a set of keys, means selectively operated by the keys for operatively connecting said master wheel to any of said gears, a source of power operating through said gears to drive said master wheel, means operable by said source of power effective upon the down strokes of the keys for disconnecting the latter from said connecting means, and means to restore the key connection upon the return of the key to normal position.

17. The combination of a stopped or assorted set of gears, a master wheel or member, a set of keys, means selectively operated by the keys for operatively connecting said master wheel to any of said gears, a source of power operating through said gears to drive said master wheel, means operable by said source of power efi'ective upon the down from said clutches to said keys to enable strokesof the keys for disconnecting the latter from said connecting means, and means to restore the key connection upon the returnof the key to normal position,

the disconnection of the key from the computing mechanism being independent of the speed of movement of the key.

18. The combination of a master wheel or tions between the keys and said closing devlces.

19. The combination of a master wheel, a power shaft, aset of mutilated gears, a set of normally open independent clutches arranged loosely upon said power shaft, keys, separate trains of connections extending from said clutches to said keys to enable anykey to control the closing of its clutch, means for opening the clutches independently of the keys, and means driven by the power shaft and called into operation upon the closing of any clutch, for disconnecting the train of connection from the closed clutch to the associated key.

20. Thecombination of a master wheel, a power shaft, a set of mutilated gears, a set of normally open independent clutches arranged loosely upon said power shaft, means normally tending to close the clutches, keys,

separate trains of connections extending from said clutches to said keys to'enable anyvkey to control the closing of its clutch, a dog for'restraining each clutch, said dog movable by the connected key to release said restraining means, and means operable through said power shaft for disconnecting each dog from its key.

21. The combination-of a master wheel, a power shaft, a set of mutilated gears, a set of normally independent clutches arranged loosely upon said power shaft, means normally tending to close the clutches, keys, separate trains of connections extending any key to control the closing of its clutch, a dog for restraining each clutch, said dog movable by the connected key to release said restraining means, means operable through the power shaft for disconnecting the dog from the key at the initial portion of the gear movement effected by the power shaft, and means to return the dog.

22. The combination of a master wheel, a source of power, a set of mutilated gears. a

set of normally open independent clutches to cooperate with said power shaft and said gears, means normally tending to cause each clutch to close, separate trains of connections extending from said clutches to said keys to enable any key to close its clutch, each train including a dog for restraining each clutch, said dog movable by the connected key 'to release said restraining means, means for opening the clutches independently of the return of the keys, a carriage for effecting relative denominational movement between the master wheel and the computing wheels, and means graded according to the mutilation of the gears, for preventing movement of the carriage while the master wheel is. rotating. 1

23. The combination with a typewriter including a carriage and means including a set of type-operating number keys for effecting letter-spacing movements thereof, of a computing mechanism including a set of for, connecting means for effecting denomination-selecting changes of relative position between said actuator and said wheels in accordance with the letter-spacing movements of said carriage, operating mechanism for said actuator including valuating means and motive means therefor, means individual to each key and effective on depression thereof ,to initiate a selective operation of said valuating means by said motive means to effect. a movement of said actuator corresponding in extent to'the number represented by the key depressed, means for automatically disconnecting said key-controlled-operationinitiating means on initiating such an operation, the relation of said key-controlled means to the other parts of the computing mechanism, after a disconnection, being such that said key may continue its downward movement,'to cause the type operated there by to print, and to return to normal position independently of any predetermined tlIIlB-IElfitlOIl, and free from possible interference with the movements of the parts 'of said mechanism set in operation thereby, means for arresting themoving parts of said mechanism after a predetermined cycle of movements, and means controlled by said operated valu'ating means for preventing a letter-spacing movement of said carriage during the operation of said actuator by said valuating means.

24. The combination with a series of mm meral keys, of valuatingmechanism for determining the extent of computation according to the value of the numeralkey actuated, make and break connections between said valuating mechanism and said numeral keys whereby the former may be controlled from termining the extent of a computation ac-= cording to the value of the numeral key actuated, make-and-break connections between said numeral keys and said valuating mechanism whereby the latter may be controlled from the former, and breaking means operated from said valuating mechanism for interrupting said connections after said valuating mechanism comes into play, so that said keys may be caused to complete their movements during, and independently of, the vfurther operation of said valuating mechanism. a

26. The combination with a series of unmeral keys, of valuating mechanism for determining the extent of a computation to correspond with the value off a numeral key actuated, and make-and-break connections between said numeral keys and said valuating mechanism whereby said numeral keys, which are normally in dominance over said valuating mechanism, may start said valuating mechanism in action and lose dominance thereover, said connections including a trip, a tripper arm for actuating said trip, a linka e for operating said tripper arm, and a '(llSCOIlIlQCiOP for positively breaking the dii connection between mid trip and said tripper arm.

2'7 The combination with a series of numeral keys, of valuating mechanism for determining the extent of a computation to correspond with the value of a numeral key actuated, and make-and-break connections between said numeral keys and said valuating mechanism whereby said numeral keys, which are normally in dominance over said valuating mechanism, may start said valuating mechanism in action and lose dominance thereover, said connections includinga dog for said valuating mechanism, a trip for said dog, a tripper arm for actuating said trip, a linkage for operating said tripper arm, and a disconnector for engaging I said trip to move it out of engagement with said tripper arm,

28. The combination with a series of numeral'keys, of valuating mechanism for determining the extent of a computation to valuating mechanisnn may start said vainating mechanism in action and lose dominance thereover, said connections including a dog for said valuating mechanism, a trip for said dog, a tripper arm for actuating said trip, a linkage for operating said tripper arm, a disconnector for engaging said tripto move it out of engagement with said tripper arm, and means for operating said Lenses I l i disconnector from said valuatlng mechanism when the latter comes into lay.

29. The combination with a series of numeral keys, of a series of valuating devices, one for each of said numeral keys and having a driving capacity corresponding to the accordant numeral key, and a series of connections, one individual to each numeral key and each valuating device for enabling a corresponding numeral key to bring its ac cordant valuating device into action, said connections including a series of trips, a series of tripper arms for actuating said trips, and a bail universal to all of said trips for disengaging any of said trips from said tripper arms when in its actuated position.

30. The combination with'a series of numeral keys, of a series of valuating devices, one for each of said numeral keys and having a driving capacity corresponding to the accordant numeral key, and a series of connections, one individual to each numeral key and each valuating device for enabling a corresponding numeral key to bring its accordant valuating device into action, said connections including a series of trips, a series of tripper arms for actuating said trips, a bail universal to all of said trips for disengaging any of said trips from said tripper arms when in its actuated position, and means for operating said hail from any one of said valuating devices.

31. The combination with a ty ewriter including a carriage and means inc udmg a set of type-operating number keys for efiecting letter-spacing movements thereof, of a computing mechanism including a set of computing wheels, a master actuator therefor, connecting means for efiecting denomi nation-selecting changes of relative osition between said actuator and said whee s in ac-' cordance with the letter-spacing movements of said carriage, operating mechanism for said actuator including a set of graded valuating members, onefor each key, and motive means therefor, means individual to each key and edective on depression thereof to initiate a driving connect on from said motive means through a corresponding valuat- 'ing member to said actuator to efiect a movement thereof corresponding in extent to the number represented by said key, means for automatically disconnecting said key-com trolled-connection-initiating means on initiating such a connection, the relation of'said key-controlled-means to other parts of the computing mechanism, after disconnection, being such that said key may continue its downward movement, to cause the type controlled thereby to rint, and to return to normal position in ependently of any predetermined timc relation, and free from possible interference with the movements of the parts of said mechanism set in operation preventing a letter-spacing movement of said carriage during the operation of said actuator thereby.

32. The combination with a series of numeral keys, of a series of power-driven valuating devices one individual to each of said numeral keys and havin a driving capacity correspondmg to the va ue of its accordant numeral key, a series of computing wheels, actuating mechanism for said computing wheels, traversing mechanism for effecting a relative movement between said actuating mechanism and said computing wheels,-con.-

nections enabling any one of said valuating devices in action to drive said actuating mechanism, and automatic means brought into play by any of said valuating devices to prevent an action of saidtraversing mechanism while any of said valuating devices is in operation, whereby the active computing wheel is locked against traveling movement only While it is being driven by the selected "al'uating device. a

33. The combination with a series of computing wheels, of actuating mechanism for said computing wheels, a carriage for effects ing a denominational selection between said computing wheels and said actuating mechanisms, a series of numeral keys, a series of valuating devices one for each of said numeral keys and having a driving capacity corresponding to the accordant numeral keys, a single connection from all of said valuating devices to said actuating mechanism whereby the motion of any one of said valuating devices will be transferred to said actuating mechanism and hence to one of said computing wheels, locking mechanism for preventing a movement of said carriage, and shifting means operating from any and all of said valuatin devices for bringing said locking mechanlsm into play when any one-of said valuating devices is 1n action so as to prevent a movement of said carriage and thus a relative traveling movement between said computing wheels and said actuating mechanism.

34. The combination with a series of numeral keys, of computin mechanism, valuating mechanism for drivlng said computing mechanism amounts corresponding to the numeral keys actuated, denominational selecting mechanism for recording the amounts in the proper denominational columns in the computing mechanism, connections from said numeral keys to said valuating mechanism rendering said valuating mechanism normally subservient to said numeral keys, locking mechanism for preventing denominational selecting movements, tripping mechanism for breaking the continuity of the connections between said numeral keys and said valuating mechanism so that a numeral key, after. starting said valuating mechanism in action, Wlll no longer be in dominance thereover, and cam means operated from said valuating mechanism and having the dual capacity of actuating said locking mechanism and said tripping mechanism.

35. The combination with a typewriter carriage, of a computing mechanism having. a series of valuating members of graded driving capacities, a series of numeral keys for controlling the action of' said carriage, and the action of said computing mechanism with said valuating members, locking means for said carriage, and graded con trols associated with said valuating members to operate said locking means and maintain the same in action forvarying periods corresponding to thedriving capacities of the associated valuating members.

36. In a computing machine, the combination with numeral keys and computing wheels, of a ower shaft, clutches under the control of sa1d keys {or causing said wheels to be turned by sa1d shaft, each clutch forming part of an indexing device for turning said wheels, a traveling carriage for selecting the wheel to be turned, an escapement for said carriage controlled by said keys independently of said shaft, a lock for holding said carriage, and a connection whereby any clutch while turning makes said lock eifective.

, WALTER E. BARNARD. Witnesses:

F. E. Amxmnmz, H. Wnrrmc.

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