US1294745A

US1294745A - Computing-machine.

Info

Publication number: US1294745A
Application number: US71906312A
Authority: US
Inventors: Walter Wright
Original assignee: UNDERWOOD COMPUTING MACHINE CO
Current assignee: UNDERWOOD COMPUTING MACHINE CO
Priority date: 1912-09-07
Filing date: 1912-09-07
Publication date: 1919-02-18
Anticipated expiration: 1936-02-18

Description

W. WRIGHT.

COMPUTING MACHINE. APPLlcATloN FILED sx-:PT.1.19|2.

Patented Feb. 18, 1919.

SHEET l.

3 SHEETS- i i s? Ill f W. WRIGHT.

COMPUTING MACHINE. APPLmATlau. man SEPT. z, 1912.

`Patented Feb. 18, 1919..

3 SHEETS-SHEEI 2.

W WRIGHT.

COMPUTING MACHINE.

APPLICATION FILED SEPT. 1. 1912.

Patented Feb.1s,1919.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE'.

WALTER WRIGHT, 0F NEW YORK, N. Y., ASSIGNOR T0 UNDERWOOD COMPUTING `MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

COMPUTING-MACHINE.

Specification of Letters Patent.

Patented Feb. 18, 1919.

Application iled September 7, 1912. Serial N'o. 719,063.

T0 all whom it may concern.'

Be it known that I, IVALTER W'RIGHT, a citizen of the United States, residing in New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Computing-Machines, of which the following is a specification.

This invention rela-tes to computing machines, and more particularly to carry-over devices and parts associated therewith.

The invention is herein illustrated as applied to an Underwood Wright machine substantially of the kind described in the patent to Degener 1,020,082, dated March 12, 1912. In said patent, a constantly driven motor is shown, which on the operation of any numeral key of the typewriter, is arranged to be connected by a master Wheel so as to carry into the computing wheels of a totalizer the number represented by the key struck.

Said patent also discloses carry-over wheels, each constantly in mesh with a computing Wheel, and each carry-over wheel adapted to be struck and slightly turned by `the computing wheel next lower in denomination o nce in each revolution of said computing Wheel,thus starting to turn the computi/ng wheel withwhich said carry-overA This initiates the carryl wheel is in mesh. 0 over, and brings a tooth forming part of the carry-over wheel into position where said tooth will be struck by teeth on a constantly driven drive shaft. Said shaft completes the turning of the carry-over Wheel, thus completing the carrying-over on the computing wheel with which the carry-overwheel meshes.

In the present invention, the active computing wheel of the totalizer maybelikewise turned by power at the striking of a key but the carry-over mechanism is preferably arranged to be only completely operated after all the digits in'a number have been registered in the computing wheels. 4When so registered, the motor is arranged ato/operate the carry-over members one after another seratim, beginning with the units'wheel. In thus operating them serz'atz'm, it is impossible to throw on any carry-over member the strain of throwing over a large number of computing wheels higher in denomination, which might have the effect of straining the computing mechanism.

ln the preferred form of the invention as the computing wheels, the computing mechamsm is arranged to automatically complete the movement of the 'carry-over' wheels, which movement has previously been begun by the computing Wheels in setting the carry-over wheels. This is preferably done by connecting to the motor a shaft which normally stands idle.

On this shaft, which is arranged to complete the movement of the carry-over wheels, is preferably formed a driving roll extending to the left from the plane of the masterwheel as far as the gang of computing Wheels will extend at any time from said master-wheel. On this driving roll is preferably vformed a series of steps or teeth one for each carry-over wheel, each step arranged to strike a tooth on a carry-over wheel, so as to complete its motion. These steps are extended around the periphery of said roll, so as to form Geneva locks with the teeth of the carry-over wheels after operating them. These Geneva locks are arrangedto positively prevent overthrow of the carry-over wheels and may hold said carry-over wheels locked during a considerable portion of the rotation of said roll.

ning with the one lowest in denomination.`

This completes the driving of each carryover wheel' before the next begins to turn; thus it is impossible for any carry-over wheel to have the strain of operating a long string of computing wheels in turning them from where they read 9 to where they read (l. When said roll has completed one revolution, it is preferably disconnected from the motor automatically, and so will have no further iniluence on the computing mechanism until the next number is completely registered.

It Will be noted that this invention is particularly applicable to machines having a master wheel which is varranged tov engage the computing Wheels sem'atz'm, andlcarry into them the numbers yrepresented by the keys struck. In such-cases, there is relative movement between the master wheel and the computing wheels. The computing wheels are preferably carried in a casing. and after the last digit has been registered, the next movement of the casing may bring` a lug on said casing into such a position that 1t w1ll connect the carry-over shaft above referred to to the motor.

Preferably there is also provided a key for causing the carry-over mechanism to operate at will. Each computing wheel, or its carry-over Wheel, is preferably provided witha detent which will hold the wheels set in whatever position they are moved by the computing mechanism.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a diagrammatic side view of an Underwood Wright computing machine with the present. invention applied thereto.

Fi 2 is a perspective view, showing the relation of the various parts of the computing mechanism.

Fig. 3 is a front view ofthe parts controlling the power drive of the carry-over mechanism.

Fig. 4 is a detail of Fig. 3;

Fig. 5 is a side view of another portion of the same parts.

Fig. 6 is a perspective view of the carryover power shaft. A

Fig. 7 shows the relation of the computing wheels, carry-over wheels, and the carry-v over power shaft, as viewed from below.

Fig. 8 is a sectional view of part of the same.

Fi 9 is a sectionthrough the totalizer, showing the partsl as'set in ordinary computing.

Fig. 10 shows the relation of the parts just before a carry-over is to be completed.

Fi 11 is a diagrammatic perspective view showlng the relation of the parts of a carryover wheel and a computing wheel.

' Numeral keys 1 and letterkeys 2 mounted on key-levers 3, when depressed swing type bars 4 by means of elbow levers 5, upwardly and rearwardly against the platen 6, so that type 7 on said type bars print on said platen. Said platen 6 is rotatably mounted in a carriage 8, which carriage is drawn forward in letter feedin direction by means of a sprin barrel 9, an is controlled in its letter fee ing by means ofescapement wheel 10, car-` rymg a ratchet wheel 11, working in arack 12 on said carriagel Said escapement wheel is controlled in its letter feeding by means of dogs 13 and 14, and said dogs are vibrated by means of a universal member 15, from heels 16 on the type bars.

The numeral keys 1 are connected by links 17 to a set of bell cranks 18, and the latter through links 19, rock the levers 20l to which are pivoted digit selecting/jacks 21, grouped in a circle. Any jack 21 may push out one of a circular series ef pins 22. which pin is carried by a drive, index, or escapement wheel 23 forming part of the computing train and through a master wheel capable of turning any of the computing wheels. The pins 22, as described in said patent to Degener aforesaid, are detained in either of their normal or projected positions by means of a coil spring band 24 engaging seats or grooves in sald pms. Each of said levers 20 bears upon a universal plate or bar 25, fixed upon a sliding rod 26, and said universal bar in a manner not material to the present invention ma -be arranged, as described in the aforesaid patent to Dcgener, to restore by mechanism not shown herein, the pin projected in the previous calculation and to connect a source of power to the shaft driving the computing mechanism. The power is preferably furnished by a constantly revolving motor 27, which may be connected in anv desired manner to a drive shaft 28, which shaft by means of bevel gears 29 and 30 may constantly drive the main drive shaft 31. Fast on this main drive shaft is a bevel gear 32, meshing with a bevel gear 33 on a shaft 34, on whlch shaft 34 is fast a pinion 35, the teeth of which pinion are arranged to lie in the path of the pins 22, on the index wheel 23, so that as said pinion 35 is turned it will cause said index wheel 23 to be turned until the pin 22, which has just been projected by a jack 21 leaves a space where the pin has been removed. Said wheel 23 will then stop, because it is no longer connected to the motor 27 through the gearing above described. l

A totalizer 36, comprising a gang 0f computing wheels 37 is connected through a master wheel 49 to the index wheel 23 by a train of gearing, which gearing includes pinion 38 fast on the shaft of said pin wheel 23, a pinion 39 meshing with said pinion 38, a bevel gear 40 fast to said gear y. 39, a bevel gear 41 meshing with said bevel gear 40 and fast on a shaft 42, which shaft 42 drives a vertical shaft 43 by means of bevel pinions 44 and 45, and said vertical shaft dri-ves a master wheel shaft 46 by means of bevel gears 47 and 48.r lSaid master wheel 49 comprises projecting teeth 50, which are arranged to engage internal teeth 51 on said computing wheels, and as said totalizer travels along with the typewriter carriage, said master wheelwill engage said computing wheels seriatz'm to turn them.

For the purpose of causing such travel of the totalizer, an arm 52a extending from the typewriter carriage is arranged to extend over and engage said totalizer, so that said totalizer has a step-by-step movement identical with that of the typewriter carriage. The parts so far described are substantially identical with those in the patent to Degdisplays the numbers engraved on it through a sight opening 53 in the casing of the totalizer, and each computin wheel is held up in place against its dia Vwheel by means of an idle wheel 5l loose on a shaft 55.

For the purpose of making a carry-over, each computing wheel has fast on it a gear 57, which is constantly in mesh with a gear 56 fast on the carry-over wheel operated by the computing wheel next lower in denoinination. For the purpose of carrying over to the next wheel higher, whenever its own zero passes the sight opening in the totalizer, each computing wheel also carries a single long tooth 58, which long tooth once in each revolution is arranged to turn its carry-over wheel a small part of a revolution by striking .one of a series of teeth 59 fast on said carry-over wheel. In the present instance, as is seen in Figs. 9 and 10, there are five such. teeth 59, and on striking one of said teeth the carry-over wheel is turned approximately one-tenth of a revolution.

When so turned, a detent 60 is arranged, as is seen in Fig. 10, to engage and enter a depression in the end of one of five teeth 61, also fast on said carry-over wheel and hold said carry-over wheel in its partly turned position. When the carry-over wheel is in said position, another one of its ve teeth 61 stands in the path of a step or tooth 62, on a roll 63. This roll is connected to the motor to be power-driven thereby and at intervals as hereinafter described makes one complete revolution. In revolving, the step 62 strikes the tooth 61 on the carry lover wheel and turns said carry-over wheel, so as to complete its movement, that is to sayfit turns said carry-over wheel, so that the computing wheel with which the carry over wheel is constantly in mesh is advanced till the dial wheel geared thereto reads one digit higher than it previously did.

Preferably the roll 63 is arran ed to automatically make its revolution a ter al1 the digits of a number have been completely recorded on the totalizer, and means for doing this will be describedhereinafter. 'In so turning, said roll 63 is arranged to positively lock said carry-over Wheels` against overthrow, and for this purpose, the step 62 is extended to form a sleeve extending around a considerable portion of the cir-v cumference of said rollv 63. Then when the roll 63 turns from the position seen in Fig. 10 to the position seen in Fig. 8, the

step 62 strikes a tooth 61 of the carry-over wheel, thus turning said carry-over wheel, but a succeeding tooth 61'- of the carry-over wheel vin turning strikes the extension i (see Fig. 8) lof the step 62, thus locking said carry-over wheel against turning any farther. In the present disclosure, the computing mechanism is arranged to either add or subtract, and for this purpose, the roll 63 is constructed to positively move and then positively lock the carry-over wheels in whichever direction it may rotate.

For this purpose, as is best seen in Fig. 6, there are two steps 62 for the units wheel, which is the right hand end of the roll 63, as viewed in said Fig. 6. These steps 62 inl the normal idle position -of the roll 63 stand adjacent a tooth 61 of the carry-over wheel, so that said tooth, when a carry-over is to be made, (see Fig. 10), stands in a hollovi7 be tween two steps. Thus the extensions of the steps 62 form a sleeve extending substantially around said roll 63. For the purpose of causing the carry-over wheel to begin with the units wheel and subsequently to be effective on each wheel higher in denomination, the vstep 62 for turning each carryover wheel is arranged to operate its carryover wheel after the one lower has been operated. This is accomplished by setting the teeth or steps 62 helically on the roll 63. Thus for the tens wheel, as will be seen in Fig. 6, the step 62 will come intp operation just after the step for the units wheel has completed the turning of that wheel.

In the present instance, the totalizer travels relatively to a fixed master-wheel, andas will be observed in Fig. 2, the roll 63 is fixed relatively to the plane of the master wheel, so that the step for operating the units carry-over wheel will operate the car-y ry-over wheel controlled by the computing wheel engaged at the moment by the masterwheel. e

The roll 63 comprises liu-bs 64, by which it is journaled on the frame of the machine, nnd a shaft 65 to which it is fast. This shaft 65 is arranged to be turned by the motor 27 once in each travel of thetotal- 105 izer in writing a complete line. For this purpose, the tota'lizer is provided with a lug 66. The movement of the totalizer succeeding the writing of a digit in the units position will cause said lug to automatically 11o connect said shaft 65 to the motor 27, and cause said shaft to make one complete revolution. The connections between said motor 27 and the carry-over roll shaft 65 include the one revolution clutch 67 loose on the 115 p shaft 3 1, (which is controlled in av manner to be later described, by the lug 66), a gear wheel' 68 meshing with a gear wheel 69 on said clutch, a bevel gear 70 fast on the shaft 71 oflsaid gear 68, a bevel gear 72 meshing 120 with said bevel gear 70 and fast on a shaft 73, which shaftI 73 carries a bevel gear, 74 meshing with bevel gear 75 fast onl a vertical shaft 76, and said shaft 76 by meansof bevel gears 77 and 78 drives said shaft 65. The 125 one revolution clutch 67 is caused to seize and turn the roll 63 through one revolution whenever the lug 66 on the totalizer strikes an arm 79 of bell lever 80 pivoted at 81.`

The bell lever 8O is connected to release a 18@ ss p clutch-holding catch 91, which catch normally holds an arresting arm 92 of the clutch 67 in such a way that said clutch is held released. The holding catch 91 is pivoted at 101,` and is normally held in its effective polsiton by a spring 102, so that it engages the arresting arm 92 and holds the clutch released. lV hen, however, the bell lever 80 is rocked by the lug 66, said holding catch is swung to ineffective position by a clutch-releasing latch 89` which latch is drawn down to strike a lug 90 on the clutch-holding catch 91. thereby swinging said holding catch so as to release the arresting arm 92 and permit the clutch 67 to seize. The connections for :wcomplishingr this include a link 82 extending from the bell lever 80 to a rock arm l84 on a shaft 83; said shaft also carrying a rock arm 85, which 'by a link 86 rocks a second rock shaft 87; said second rock shaft draw'- ing down by means of a rock arm thereon, a link 88, which link draws down the clutchreleasing latch 89. When said clutch-releasin latch 89 is drawn down, as has been de-scri ed above, it releases the clutch-ar,- resting arm 92 and permits said arm to be swung by a spring 93 on the clutch 67, so that a tooth 95 on said arresting arm will engagewith one of the teeth 96 on the drive shatt 31` and thereby cause the clutch to seize and turn. lVhen the clutch turns, it turns the carry-over roll 63 through gears 68` 69, 70, etc..

When Said clutch has made one revolution, the arresting arm- 92 of the clutch strikes the clutch-holding catch 91, thus swinging the arresting arm clear of the teeth 96 and releasing the clutch 67 from the shaft 31. and arresting the clutch 67, thus positively arresting the train of gears 68, 69, 70, etc., extending from the clutch 67 to the carry-over roll 63.

In order to return the holding catch 91 to effective position said holding catch 91 is released from the releasing latch 89 as soon as it has released the arresting arm 92. For this purpose, the releasing latch 89 is pivotally mounted on a lever 108, and is normally held in its effective position by a spring 100 anchored in the lever 108 and in an arm of said catch. After the releasing latch 89 has been drawndown to release the clutch-holding arm 92, said releasing clutch continuesito be drawn along by the link 88, so thatl a cam extension 98 of said releasing latch strikes a throw-out pin 99 fast on the frame of the machine, and the further movement of the releasing -latch 89 causes said cam to swing the releasing latch 89 clear oi the. lug 90 on the holding catch 91. This permits said catch 91 to be immediately swung back to effective position by means of a spring 102.

When the lug 66 on the totalizer releases the bell crank 80, the releasing latch 89 is the auxiliary catch, and arrest it.

drawn bac-k to normal position by a spring 109, this being permitted by the spring 100 which allows the nose of the releasing latch 89 to be oa'mmed out by the lug 90 during the upward swing of the lever 108 on which said releasing latch is ivoted.

Since it is possible For the holding catch 91 to be kept in ineffective position so long that it will fail to arrest the arresting arm 92, an auxiliary catch 104 is Iprovided which will intercept said arresting arm (see Fig. 5), if the holding catch 91 has not yet returned to effective position. Said auxiliary catch 104 is formed as a slide on the holding catch 91, guided by a pin 106 Working in a slot on said holding catch said auxiliary catch 104 -slides in a trough formed by the turned-up edges of a plate 104a riveted on the holding catch 91.

Said auxiliary catch is normally drawn upwardly by a spring 105, which holds it so that the auxiliary catch will yield and the shock of arresting the clutch 67`by the arresting arm 92 will be absorbed by said spring 105. lfVhen the arresting arm 92 has been thus arrested by the auxiliary catch, the spring 102 will swing the holding catch 91 with its auxiliary cat-ch 104, permitting the arresting arm 92 to slip oli' said auxiliary catch onto the holding catch 91. A pin 103 prevents the holding catch 91 from being swung too tar around by its spring 102.

The auxiliary catch 104 is limited in its sliding on the holding catch 91 by shoulders 91l on said holding catch which at the limits of sliding intercept shoulders 104", 104e,1` (13111 e clutch 67 is held in its norm'al position by a spring detent 110, which enters the cut away portion or notch 111 in said clutch. This prevents the clutch 67 and shaft 31 from rebounding when arrested by striking the arm 92 against the auxiliary catch 104. y

It will be observed that in setting the carry-over wheels in position to be operated on by the roll 63, each computing wheel will give a slight turn t0 the computing wheel next above, so that the digits on the dial wheels will not stand exactly in line, and as has been pointed out above, they will be held in whatever position they are set by meansof spring detents 60. This irregularity in the digits will be a warning to the operator if the carry-over mechanism should fail to Ibecompletely,operated through failure of the clutch 67 to seize.

If a very long totalizer is on the machine but only a few computing wheels are used in said totalizer, it might be that the operator would prefer not to have the tot-alizer travel the long run ot' the carriage to cause the lug 66 to automatically operate the carry-over roll 63. To provide for the hand connection of said roll 63 to the motor. in such andother circumstances, a key 112 fast to rock shaft 83 may be depressed so as to rock said shaft and cause the clutch G7 tp seize. To connect this hey so as not to interfere with lug (56, and also to permit the lug 66 to rock bell lever 7i) idly on the return of the carriage. a lost motion device is provided between link S2 and the rock shaft Si. Said lost motion device comprises a plunge-r 1123. which plunger is on the link82 and when drawn h v said link engages a head 114 in a cylinder 115 pivoted to Isaid rock shaft 84, thus lswinging lsaid shaft. wWhen the key 112 is depressed the cylinder 115 slides up idly on the plunger 113. spring 116 interposed between the lower end of the cylinder and the head 114 prevents the loose parts from rattling. Thus it will be seen that the depression of key 112 will not disturb link S2. This lost motion permits the bell lever S0 to be depressed idly on the return of the totalizer to register' a.new number.

The roll G3 has been described as built for either addition or subtraction. `To reverse this roll and the master-wheel there is pro vided a clutch ."for each, intermediate them and the motor. Each clutch comprises a member 117 slidablysplined on its shaft, S0 as to revolve therewith. The clutch 118 on the shaft 43 may engage either the bevel gear 48 loose on said shaft, or the bevel gear 120 also loose on said shaft. Each of these gears constantly meshes lwith the bevel gear 47, and therefore the gear engaged by the member 117 will drive the master-wheel while the other runs idle. In the same way the member 117 on shaft 76 may drive shaft 65 by either bevel gear 77 or 119. These two clutches 117 may be coupled together in any desired manner.

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

.Having thus described my invention, I claim:

1. In a computing machine, the combination with a gang of computing wheels, of a master-wheel arranged to engage and set said computing wheels sefrfiatz'm, carry-over members set by said computing wheels, and power means for operating said carry-over members seriatz'm after all the computing wheels have been set.

2. In a computing machine, the combination with a gang of computing wheels and carry-over wheels forming a train therewith, each constantly in mesh with the computing wheel which it operates, of means for causingeach carry-over wheel to be set by a computing wheel, power means for operating said carry-over wheels seratz'm, and means for positively preventing overthrow of said carry-over wheels by said power means.` Y

, 3. In a computing machine, the combination with a gang of computing wheels and carry-over wheels therefor constantly geared thereto, of a detcnt for each computing wheel. means for setting each carry-over wheel by the computing wheel below, power means for turning each carry-over wheel which has been set, and means for positively arresting the carry-over wheel when it has been operated by said power means.

4. In a computing machine, the combination with a gang of computing wheels and `carry-over wheels therefor, of a masterwheel arranged to travel relatively to said wheels to engage them .vera-tim to turn them. means for setting each/ carry-over wheel by a computing wheel, and means `:automatically operated by the movement relative to said master-wheel to cause said carry-over wheels to operate.

5. In a computing machine, the combination with a gang of computing wheels and carry-over members therefor. of a master-wheel arranged to travel relatively to said wheels to engage them seria-tim to turn them, means for setting each carryover member by a computing wheel, means automatically operated by the movement relative to said master-wheel to cause said carry-over members to operate, and manually operated means to causesaid carryover members to operate at will.

6. In a computing machine. the combination with computing wheels and carry-over wheels each forming a train with one of said computing wheels. of a master actuator for setting said computing wheels ,celia-tim, means for setting each carry-over wheelY by a computing wheel, a source of power for automatically completing the motion of said carry-overl wheels after said master-wheel has set every computing wheel` means for Vholding each carry-over wheel when it is not being turned, and means for disconnecting said source of power after it has operated all of said wheels.

7. In a computing machine,.the combination with a gang of computing wheels. a carry-over wheel constantly in mesh with each of said wheelsand a master-wheel arranged to travel relatively to said computing wheels to engage them sarintz'm to turn there` of means for setting each carry-0ver wheel by a computing wheel. teeth on said carry-over Wheels, and a roll having a tooth to engage each carry-over wheel by its tooth to positively turn it, said'roll also having a Geneva lock surface adapted to hold each carry-over wheel locked when the roll has passed the point at which it is adapted to turn the carry-over wheel.

8. In a computing machine, the combina` tion with a vgang of computing wheels, of a Acarry-over wheel constantly in mesh with each of said wheels and a master-wheel arranged to travel relatively to said computing wheels to engage them serz'az'm to turn them, means for setting each carry-over wheel by a computing wheel, teeth on said carry-over Wheels, a roll having a tooth to engage each carry-over wheel by its tooth to positively turn it, said roll also having a Geneva lock surface adapted to hold each carry-over wheel locked when the roll has passed the point at which it is adapted to turn the carry-over wheel, and means automatically operated by the relative travel of said master-wheel and computing wheels to cause said roll to be connected to a source of power to turn said carry-over wheels.

9. In a computing machine, `the combination with a gang of computing wheels and carry-over wheelsv therefor, of a master wheel arranged to travel relatively to Said computing wheels to engage and set them, .serit-m, means for setting each carry-over wheel by a computing wheel, a common operating, member to complete the operation of all set carry-over wheels on a single cycle of movement, a power shaft, means for connecting the operating member to the power shaft, means dependent for operation on 'the relative movement of the computing wheels for rendering said last-named means effective, and means for releasing and arresting the operating member at the completion of its cycle of movement.

10. In a computing machine, the combination with a gang of computing wheels and carry-over wheels therefor, each constantly in mesh with a computing wheel, of a master wheel arranged 'to travel relatively to` said computing 4wheels to engage and set them, sem'atz'm, means for setting each carry-over wheel by a computing wheel, a

common operating/,member to complete the operation of all set carry-over wheels on a single cycle of movement said operating member including means for locking the carry-over wheels immediately after the completion of their movements to prevent overthrow of the computing wheels, means for holding the carry-over wheels and the computing wheels in mesh therewith in normalv position between computing operations, a power shaft, means for connecting they operating member to the power shaft, means dependent for operation on the relative movement of the computing wheels for Vrendering said last-named means e'ective,

and means for releasing and arresting the operating member at the completion of its cycle of movement. i

1l. ln a computing machine, the combination with a gang of computing wheels and carry-overr members therefor, of a masterwheel arranged tdengage said computing wheels seratz'm, and a single power-driven member arranged to operate said carry-over members after they are all set.

meer@ -carryf'over members therefor, of a masterw-heel arranged to engage and set Said computing wheels seratzm, of a power-driven lmember arranged to automatically operate said carry-over members after they have all been set, and means on said power-driven member for positively locking every computing wheel against overthrow.

13. In a computing machine, the combination with computing mechanism including computing wheels and carry-over wheels, of means for turning said computing Wheels scritti/im, means associated with said computing wheels for setting the carry-over wheels to later ei'ect a carry-over, a motor, a device driven by said motor for operating the said carry-over wheels scm'wzim, normally ineii'ective means for positively driving said operating device'by said motor, normally restrained means to enable said motor to drive said operating device a uni;

'to engage said computing wheels serz'atm to turn them, 'a clutch arranged to connect said power-driven device to its source of power, a lug fixed relatively to said computing Wheels and arranged by the relative movement of said computing wheels and master-wheel to control said clutch, and a lost motion device between said lug and said clutch to enable said lug to pass idly in one direction.

15. In a computing r'nachine, the combination 'with computing wheels and carry-over wheels, of a source of power for operating said carry-over wheels, a pivoted member for automatically connecting said carryover wheels to said source of power, a key for manually connecting said carry-over members 'to said source of power, and` a lost motion device in said automatic connection to enable saidkey to be operated freely.

16. lin a computing machine, the combination with computing Vwheels and a settable carry-over wheel for each computing wheel .e constantly engaging its computing wheel,

struck by said last named wheel when saidV carry-over wheels are set, and a deten't for each carry-over wheel arranged to normally hold said carry-pover wheel by entering be.

tween said teeth and to hold its carry-over wheel set by means of depressions on the end of said teeth.

17. In a computing machine, the combination with computing wheels and carry-over wheels each constantly in mesh with its computing wheel, of ,teeth on each carryover wheel arranged t0 turn it slightly from the eomputinguvheel below, other teeth arranged to turn'it to complete its operation, power means for completing said operation, a Geneva lock surface adapted to prevent overthrow and forming part of said power means, and a detent arranged to hold said carry-over wheel either in ,normal posit-ion or in partially turned position.

'18. In a computing machine, the combination with computing wheels and carry-over wheels each constantly in mesh with its computing wheel, of teeth on each carry-over wheel arranged to turn it slightly from the computing wheel below, other teeth arranged to turn it to complete its operation, power means for completing said operation, a Geneva lock surface adapted to prevent overthrow and forming part of said power means, and a detent arranged to hold said carry-over wheel by means of the last named teeth either Vin normal position or in partially turned position.

19. In a computing machine,the combination with a gang of computing wheels and carry-over wheels therefor, of means for setting each carry-over wheel by the computing wheel below, means for positively arresting the carry-over wheel when it has been operated, a letter-feeding carriage, means controlled by movement thereof for successively selecting the computing wheels, and means independent of said selecting means but also controlled by movement'of the carriage for completing the operation of said carry-over wheels.

20. In a computing machine, the combination with carry-over members, of power-A driven means for operating said carry-over members seratz'm, a source of power, a clutch `intermediate said source of power and said power-driven means, means nor-y mally holding said clutch released, means for causing the release an subsequent reengagernent of said holding means, and means for preventing overthrow of said power-driven means when arrested by said holding means. f

2l. In a computing machine, in combination, a .computing mechanism comprising computing wheels and carry-over wheels to be set thereby, a carry-over operating member to complete the operation`of the set carry-over wheels, a source of power, and a one revolution clutch mechanism to intermittently eect temporary Adriving connections between said operating member and said source of power, said clutch mechanism including means to arrest the operating member and hold it in normal position after the tompletion of each operation of said clutch mechanism.

22. In a computing machine. the combination with computing means including units column means, of carry-over means. a masi ter member for operating said computing means seriafz'm, power means for automatically operating said carry-over means when said master member has operated ,sc/'iate'm on the computing meansineliuling the unit-s means, and av connection for manually making said power means effective on said carryover means.

23.v Ina computing machine, the combination with computing wheelsv and carry-over wheels to be set thereby, of an index wheel rotating in fractions of a revolution to drive said computing` wheels, said index wheel forming part of a driving train. a normally stationary carry-over ope ating wheel, and means for turning said wheel a full revolution vat every operation thereof, to complete the operation o f the set carry-over wheels.

24:. In a computing machine, the combination with a gang of computing wheels and carryover devices therefor, each carry-over device being constantly in mesh with a computing wheel, of means for setting each carry-over device by the computing wheel below it, means foroperating the set carry-v over devices and for arresting them when so operated to prevent overthrow of the computing wheels, a carriage for selecting the computing wheels in whichl computing is to be done, connections whereby the carriage effects said selecting, and means controlled by the forward feed of-said carriage .for rendering said carry-over operating means effective.

25. In a computing machine, the combination with numeral keys and a traveling carriage, of a source of power, computing wheels, means controlled by said keys for determining how 4and when said wheels shall be turned sem'atz'm by said source of power, a carry-over drive associated with said wheels, means controlled by the carriage for determining when said carry-over drive shall be effective, carry-over wheels driven by said carry-over drive, a Geneva lock member for operating said carry-over wheels, and means whereby said Geneva lock member is arrested after one revolution after being started by said carriage.

26. In acombined typewriting and computing machine, the combination with com.- puting wheels and a traveling carriage, of carry-over devices for said wheels, means associated with said carriage for determining when Said carry-over devices shall 0perate, a clutch'for controlling said operat1on, a lost motion member forming part of the connections between said control' and said clutch, and a manually operated controlling member located at said lost motion member.

27 In a combined typewriting and computing machine, theY combination with a traveling carriage and a master wheel, ot' computing wheels, carry-over wheels, a power drive for said master wheel-normally d isconnected from said master wheel, and connected-thereto independently of said carriage, and connections from said power drive to said carry-over wheels also normally dis` connected but connectible by said carriage.

28. In a combined typewriting and computing machine, the combination with a traveling carriage and a master wheel, of computing wheels, carry-over wheels, a power drive `for said master wheel normally disconnected from said master wheel, connections from said power drive to said carry-over wheels also normally disconnected, numeral keys 'for' connecting said master Wheel to said power drive, and means whereby said carriage connects said carryover wheels to said power drive.

29. In combined typewriting and computing machine, the combination with a traveling carriage and a master wheel, of computing wheels suflicient in number to be operated as a plurality of small totalizers and carry-over wheels therefor, a power drive for said master wheel normally Adisconnected from said master wheel, connections from said power drive to said carry-over wheels also normally disconnected, numeral keys for connecting said master wheel to said power'drive, means whereby said carriage connects said carry-over wheels to said power drive, and manual means for connecting said ,carry-over wheels to said power drive.

30. In a computing machine, the combination with a gang of computing wheels and carry-over wheels therefor, of a power-` driven member for operating said computing wheels, means for setting each carryover wheel by the computing wheel below, means for positively arresting the carryover wheel when it has been operated, a traveling carriage for successively selecting -the computing wheels` means for turning `each wheel While so selected, a source of power for effecting the carry-over operation, and lmeans dependent on movement of said carriage and independent of said power-.driven member for connecting the same withsaidsource of power.

31. In a computing machine, the combination with a gang of computing wheels and carry-over devices therefor, of means for setting each carry-over device by the computing wheel below it, means for arresting each carry-over device when it has been operated to prevent overthrow of the computingwheels, a carriage for selecting the computing wheels in which computing is to be done, a source of power for el'ecting the carry-over operation, and means for connecting said carry-over devices to said source of power on the forward feed of said carriage at a time independent of the driving ofthe computing wheels.

32. In a computing machine, the combination with a step-by-step feeding carriage and computing wheels, of a master wheel for y. selecting and operating them seratz'm, carry-- lcoperative relation with the master wheel to be engaged and set 'thereby Serial/tim, anV

operating member into cooperative relation with which the carry-over wheels are brought by the lateral movement of the computing mechanism, and means whereby the operation of the set carry-over wheels is completed, sem'atm, by rotation of the operating member.

34. In a computing machine, in combination, a computing mechanism, comprising computing wheels and carry-over wheels to be set thereby, a master wheel, means to impart lateral movement to the computing mechanism relative to the master wheel to bring the computingfwheels. successively into coperative relation with. the master wheel to be engaged and set thereby, seratz'm, and an operating member provided with. a series of stepped engaging aces into coperative relation with which the carry-over wheels are brought by the lateral movement ofthe carriage at and after the time at which they are set by the computing wheels,

and by whichI the set carry-over wheels are set sem'cztz'm on rotation of the operating member.

35. In a computing machine, in combination, computing mechanism, comprising carry-over wheels set by rotation' in one direction, for addition, and in the opposite direction, for subtraction, yand a carry-over operating member comprising means for engaging and operating the carry-over ywheels when set for addition, on rotation in one direction, means for engaging and operating the carry-over wheels when set for subtraction, on rotation in the-opposite direction,l

and a Geneva lock engagement to prevent overthrow on operation of the carry-over wheels in either direction.

36. In a computing machine, in combination, a computing mechanism, comprising carry-over wheels set by rotation in one direction, for addition, and in the opposite direction, for subtraction, Tand a carry-over operating member provided with one set of stepped faces to engage and operate, se- M'at/m, the carry-over wheels when set for addition, a second set of stepped faces to engage and operate, serz'atz'm, the carry-over wheels when set for subtraction, and a Geneva lock engagement to prevent overthrow on operation of the carry-over wheels in either direction.

37. In a computing machine, in combination with a computing mechanism, comprising computing wheels and carry-over wheels to be set thereby on rotation in either direction, a carry-over operating device compris ing two series lof, engaging faces stepped in right and left-hand order, one series to engage and operate, sem'at/m, set carry-over wheels, on rotation in one direction, and the other series to engage and operate, serztz'm,

y and in the same order, set carry-over wheels,

on rotation in the opposite direction.

38. In a computing machine, in combination, a computing mechanlsm, comprising computing members and carry-over members adapted to be Set by rotation in, one direction for addition, and in the other direction for subtraction, a carry-over operatmg l-device laterally movable with. respect to the ing device movable laterally with respect to the computing mechanism, and means `dependent upon such relative lateral movementfor setting the carry-over operating device into operation to complete the operation of the set carry-over members.

WALTER WRIGHT.

Witnesses:

F. E. .AmxANDnR, JU'LrUs DUCKSTINE.