US1271253A - Combined type-writing and computing machine. - Google Patents

Description

w. WRIGHT. COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED APR. 9. I910 Patented July 2, 1918.

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COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED APR. 9. l9l0 4 SHEETS-SHEET 2.

Patented July 2, 1918.

W. WRIGHT.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED APR. 9. I910.

Patented July 2, 1918.

4 SHEETS-SHEET 3.

w M WW v w. WRIGHT.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED APR. 9. 910. 1,271,253. Patented July 2,1918.

Q 4 SHEETSSHEET 4- 3 UNITED STAES PATENT OFFICE.

WALTER WRIGHT, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD COMPUTING MAGHIN E COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

Specification of Letters Patent.

Patented July 2, 1918.

Application filed April 9, 1910. Serial No. 554,452.

To all whom it may concern:

Be it known that I, WALTER WRIGHT, a citizen of the United States, residing in New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Combined Type-Writing and Computing Machines, of which the following is a specification.

This invention relates to means for releas ing and stopping the primary escapement wheel in computing mechanisms in which there is a relative step-by-step denominational movement between the 111aster-wl1eel and the computing wheels. A machine of this class is illustrated in U. S. patent to G. O. Degener, dated April 25, 1911.

Heretofore, the numeral keys of the computing mechanism have not only controlled the step-by-ste letter-feeding movement of the carriage to which either the master wheel or the computing wheels are connected for denominational movement). but have also actuated the dogs which control'the starting and stopping of the power-driven primary escapement wheel of the computing mechanism; said keys being connected to release the carriage for its step-by-step movement during the return strokes of the keys, and said escapement wheel being intended to rotate (together with the usual master-wheel) after the carriage has completed its letter-feeding movement.

The object of the present improvements is to eitect a more intimate relation between the master-wheel and the carriage, co the end that their respective operations shall take place in proper sequence, and' so that the carriage shall complete or almost complete its letter-feeding movement by the time the master-wheel begins to rotate; this result to be effected independently of the keys, so that if for any reason, the movement of the carriage is delayed after being released by the keys, there may not occur a premature rotation of the master wheel, with consequent liability t error in the operation of the computing mechanism.

To this end, the dog which releases the primary escapement wheel is connected directly to the carriage to be operated thereby.

In the preferred form of the invention, a rack is connected to the carriage, and a pallet, which is connected to said dog. is adapted to coiiperate with said rack to enable the carriage to actuate the dog in such a manner that the primary escapement wheel of the adding mechanism is released by said dog at the concluding portion of the letterfeeding movement of the carriage. When the improvements are applied to a combined typewriting and adding machine, as shown in the drawings, the pallet may be normally disengaged from said rack during the operation of the alphabet keys or during ordinary typewriting, but the numeral keys have means for moving said pallet into engagement with said rack, so as to cause the pallet to be operated by the carriage. The numeral keys, as before, control the extent to which the primary escapement wheel rotates. but the release of said primary escapement wheel is effected by the carriage independently of the keys, so that liability of premature rotation of the master-wheel is avoided. Other features and advantages will hereinafter appear.

In the accompanying drawings.

Figure 1 is a side elevation, partly broken away, and shown partly in section, of an Underwood typewriting machine. with the present improvements applied thereto.

Fig. 2 is a rear elevation of the machine, parts being broken away or omitted. ,Tn Figs. 1 and 2, the parts are shown in normal positions.

Fig. 3 is an enlarged elevation showing the movement of a pallet into engagement with a curved rack or wheel which drives the same.

Fig. 4. is a view corresponding to Fig. 3, but showing the pallet as having been given a stroke by said rack or wheel, whereby the escapement wheel of the computing mechanism is released.

Fig. 5 is a perspective rear view of the principal portions of the mechanism, the parts being shown in normal positions.

Fig. 6 is a sectional front elevation of a master wheel and one of the computing wheels, and the gears by which the shaft is rotated on which the master wheel is mounted. This view shows that the teeth of the master wheel are thinner than the body of "he computing wheel with which it meshes. to allow some play or movement of the adding wheel in axial direction while being rotated by the master wheel. without liability of SlllllllttlnQO! s rotation of the ad- 'oinin com utin wheel by said master wheel.

The typewriting mechanism includes alphabet keys 1 and numeral keys 2, all mounted upon levers 3,'having returning springs 4 and connected by means of elbow levers 5 with type-bars 6, to cause the latter to swing upon pivots 8 to the platen 7 Each type-bar carries a heel 9, to press rearwardly a universal bar 10, mounted upon a frame 11, the latter pivoted at its rear end to idle arms 12*. Said universal bar frame 11 swings rearwardly a dog rocker 12, carrying a feeding dog 13 and a detent dog 14, whereby a paper-carriage 15 is given its letter-feeding motion, said carriage being propelled by a spring 15". Said dogs move into and out of engagement with an escapement wheel 16, which is connected to a pinion 17, the latter meshing with a rack 18 upon said carriage. Upon the universal bar is provided an actuator 19 for a ribbon-vibrating lever 20. As so far described, the parts are in common use upon the Underwood typewriting machine.

Whenever a key is depressed, the elbow lever 5 is swung forwardly, and the typebar is swung rearwardly against the platen to make an impression thereon, and the unlversal bar pushes the feeding-dog 13 out of engagement with the escapement wheel 16, and the detent dog 14 into engagement with said wheel; no letter-feeding motion of the carriage occurring at this time. Upon relieving the key from pressure, the parts are returned to normal positions in the usual mannerg the universal bar being returned by a spring 21, and moving the detent dog out of engagement with the escapement wheel 16, and the feeding-dog 13 into engagement therewith; said feeding-dog permitting the carriage to advance a letter space under the influence of the driving spring 15% as usual.

All of said keys control the letter-feeding movements of the carriage 15; but only the numeral keys 2 are connected to the adding mechanism, which is power-driven, its motor being indicated at 22, and being connected by a suitable train of gearing to the adding wheels 23, and a primary or variable escapement wheel 24, the latter being under the control of the numeral keys 2, whereby the keys are enabled to determine-how far the computing wheels 23 shall be rotated by the motor 22.

Preferably, the motor 2-2 is constantly revolving, although the primary escapement wheel 24 remains motionless, together with the computing wheels, until. the keys 2 are operated. The connection from the motor includes any suitable clutch 25, whereby is driven a Siluft 26, the latter having a pinion 27 meshing with pinion 28, whereby is rotated a shaft 29, having at its opposite end a pinion 30. To the last is connected,

' by means of a gear 31, a pinion 32 upon a shaft 33, the latter also having a pinion 34, p

15, to travel therewith, whereby the computing wheels are given a denominational movement, relatively to the stationary master-wheel, at every letter-feeding movement of the main carriage 15.

For carrying tens from one computing wheel to the next, there may be employed any of the devices illustrated in any of my pending applications, or any other suitable tens-carrying devices. The wheels 41 mesh with number-bearing wheels 41.

The primary escapement wheel 24 is connected to the described train of gearing by means of pinion 45, on the shaft of the escapement wheel, said pinion meshing with gear 46 fixed to the gear 31 already de-' scribed. Said escapement wheel 24 carries a set of setta'ble pins or teeth 47, one of which is projected and in engagement with a four-toothed pinion 48, which is connected to a secondary escapement wheel 49, the latter normally pressing against a feeding dog 50.

The movement of said dog 50 releases the secondary wheel 49, and allows the latter to be turned by the projecting escapement pin 47, so that the succeeding tooth of the four-toothed pinion 48 may be engaged by the next projected tooth 47, to arrest the primary escapement wheel 24, and hence the described train of gearing, including the computing wheels 41.

The escapement pins 47 are projected by means of the numeral keys 2, the latter being connected by links 51, pendent from bell-cranks 52, and having hooks 53 to engage suitable projections or parts 54 on the key levers 3. The bell cranks are connected by horizontal links 55 to arms 56, suitably pivoted at 57, (and working in a radially slotted fixed guide plate 56 and preferably formed at their opposite ends with cams 58, for camming the escapement pins 47 from normal positions to projected positions, to enable them to engage the foiirtoothed pinion 48, With the exception of the 58, the computing mechanism details so far described are set forth in certain of my said pending applications.

The dog 56 is operated at the letter-feeding movement of the paper carriage 15 of the typewriting machine. For this purposea rock shaft 59, on which said dog is fixed,

newness is provided with an arm 60, connected by a link 61 to an upstanding lever 62, to which is pivoted at 63 a pallet 64 having a tooth 65 normally standing idly above a curved rack or toothed wheel 66. The latter is fixed to the shaft 67 which carries the escapement wheel 16 of the paper carriage 15, so that the two wheels 16, 66 revolve in unison, or as if constituting a single wheel.

It will be understood that during the ordinary operation of the paper carriage 15, the wheel 66 may revolve, but the pallet 6% lies idle as in Figs. 2 and 5. All of the numeral keys, however, have means to depress the pallet into engagement with the wheel 66, so that during the succeeding movement or" the paper carriage, said pallet will be forced by the wheel 66 toward the right, from the position of Fig. i. to that of Fig. 4, thereby vibrating the lever 62, and through the link 61 swinging the "feeding dog over to free the secondary escapement wheel d9, as at Fig. 4.

The movement of the pallet 64 is effected by any of the numeral keys 2 through the arms 56, said arms bcinonormally adapted to engage a universal disk or member 68, around which the arms are grouped radially. Said disk is mounted upon a guide rod 69 and has a returning spring 70. Upon the rod 69 is provided a head or collar 71, and the end of a lever 72 is confined between said head and said universal bar or member 68 to be operated thereby. lhe lever is pivoted at 73 to any fixed support, and connected by a link 74 to an arm 75 of a bell crank 7 6, a second arm 77 thereon being connected by a link 78 to a lever 79, the latter having a pin 80 to engage said pallet 6% to depress the same.

In operation, the keys 1 may be manipulated for ordinary typewriting in the manner already describe W hen a numeral key 2 is depressed, it also swings up itstype-har to print, and the type-bar operates the universal bar 11 of the lettercieeding mechanism, the rear of the latter engaging a projection 12 on the dog rocker and moving the feedg-dog 13 'o'zt of engagement, and the detent 14 into engagement with the escapement wheel 16. he same time the link 51 is pulled down b; said key, the hell crank 52 is turned, and 7" means of the link swings y operating the universal 1 the er '72, which, in

' link n 86 on the latter the Fig. 3 posii of spring n.- with the te- Figs. 2 and 5. This detent 82 yields to the downward pressure of lever 7 9, and the projection 83 presses the detent aside, and de scends to the Fig. 3 position, where it may be held down by the same detent against the lifting tension of spring 81. During the de pression of the key 2, there is no endwise movement or" the pallet 6%, and the dog 50 remains motionless, and continues to hold the secondary escapement wheel 4:9 against movement, as well as the primary escapement wheel 24-.

During the swinging of the arm 56 effect ed by the depression of the key 2, the cam 58 on said arm engages the ad acent pin 47 on the main escapement wheel 24, and projects the same .into position to engage the four-toothed pinion 48. lhis, however, takes place pretty near the end of the down stroke or" the key, so that the rotation of the com puting mechanism including the escapenient wheel 2% and the master wheel d0 for the preceding numeral key stroke, can overlap the initial portion of the down stroke of the succeedingly operated numeral key. That is to say, the period between the instant at which the carriage is brought to rest from a preceding numeral key stroke and the end 01 the down stroke of the succeeding reacting numeral key before the engagement of one of the cams 58 with the apposite pin 45?, can be used to enable the drive of the computing wheels by the master Wheel, the carriage being stationary and the master wheel non-traveling at this time. Inasmuch as the rotation of the master wheel is very test, this enables the rapid successive operation of the numeral keys without any appreciahlehalt therehetween inasmuch as the computing for each stroke or" a numeral key is started the end of the upstroke thereof and proceeds during the succeeding inie, which may everlap the first part of the downstroke or a succeedingly operated numeral key.

Upon'the relief of the key 2 from pressure, the type bar and key lever are returned to normal positions, togetherwith arm c 5S, universal member 68, and the pa nected to the latter, including the le 1 on the TQUHELOf the type bar the paen, the spring 21 moves the universal forwardly, and the detent ll escapes from, and the fee ing-dog 13 moves into the line with, th escapement wheel 16 cf the 15, and e spring 15 is perted to pull said carna e the width of one l6 are acccrr J2 distance G}. one teeth, 2

a t t and rec riage 15; and since the latter may not'quite have completed its movement at the time that the rotation of the master wheel begins, the latter is made thinner than the computing wheel, so as to avoid operating two ad- 'olnin com utin wheels at the same time,

in case the carriage 15 is not at rest when the master wheel begins to turn. The difi'er ence in the thickness of the master wheel and a computing wheel is illustrated at Fig. 6.

The succeeding tooth of the secondary escapement wheel &9 may be arrested by a detent dog 84:, fixed to the feeding dog 50, and a little in rear thereof as in Fig. 1,,to give clearance to the teeth of the wheel 49. During the movement of the wheel 66 to the right from the position of Fig. 3 to that of Fig. 4, the pin 83 on the pallet rides along the under side of a point ortrip 85, which is formed upon the bottom of a fixed bracket 86; the spring 81 tending constantly to lift said pin 83. As soon as pallet 64:

has been driven by the wheel 66 far enough to the right, as shown in Fig. st, the pin 83 is lifted by the spring 81 past the tip of the point 85, and the spring 87 at once draws the pallet 64 to the left, the pin 83 riding up along an inclined portion 88 of the point 85, whereby said projection 83 is lifted, and

the tooth is brought up clear of the wheel- 66; said spring 87 returning the parts to normal positions, including lever 62 and dogs 50 and 84:, and the tooth of the secondary escapement wheel 49 slipping off from the detent 84, and resting in its normal position against the feeding dog 50. The spring 87 may be connected to an ear 89 formed on the pallet 64:, and may be attached to, a lug 90 provided on the frame of the typewriter; and the pallet 64 may have an adjustable stop 91 to engage said lug, so that said pallet shall be held in proper position for engagement with the teeth of the wheel (36, as at Fig. 2; the adjustable stop 91 permitting the pallet 64 to accommodate any variation in the normal position of the teeth of the wheel 66.

It will thus be seen that the carriage 15 eficcts or controls the rotation of the computing master wheel 40, the relative denolninational movement between which and the computing wheels is also controlled by said carriage, whereby liability of clashing or other undesirable action of theparts is eliminated.

The links 51 which connect the keys 2 to the bell crank 52 are passed through holes 92 in a horizontal bar 93. The latter may be shifted endwise to the right (Fig. 2) to disconnect said links, so that the keys 2 may be operated without actuating any part of the adding mechanism, and without causing the pallet 6-1 to move down into engagement. with the wheel 66. Said bar 93 may be provided with a finger piece 94:, and a detent 95 may hold the bar at either end of its movement. It will be understood that the links 51 swing around points 96 at which they are pivoted to the bell crank their released positions being shown in dotted lines'at Fig. 2.

The invention herein disclosed and claimed is an improvement upon the invention set forth in my co-pending applica-. tion, Serial No. 485,046. Claims generic to both forms of the invention will not be claimed herein, but will be claimed in said prior (o-pending application.

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 combined typewriting and computing machine, the combination of a power-driven computing mechanism having an escapement wheel, a carriage, type-opcrating keys including a set of numeral keys. a carriage-feeding device controlled by all of said keys, said computing mechanism including a member connected to have a denominational step-by-step movement at the feeding movement of the carriage, a rack connected to said carriage, a pallet, means controlled by said numeral keys to move said pallet into engagement with said rack to be operated thereby, said pallet having 110 means to release said escapement wheel, and mechanism extending from said numeral keys to said escapement wheel, to determine the extent of movement of the latter.

2. In a combined typewriting and com- 115 puting machine, the combination of a power-driven computing mechanism having an escapement wheel, a dog device to release and arrest said escapement wheel, a carriage alphabetical and numeral type-operating 120 keys, a carriage-feeding device controlled by all of said keys, said computing mechanism including a member connected to have a denominational step-by-step movement at the feeding movement of the carriage, a rack 125 connected to said carriage, a pallet, means controlled by said numeral keys to move said pallet into engagement with said rack to be operated thereby, an operativeconnection between said pallet and said dog de- 180 render said pallet effective to operate said dog device, a computing mechanism started and stopped by said dog device, and including a member connected to said carriage for a step-by-step denominational movement, and means controlled by said keys to determine the extent of operation of said computing mechanism.

4. The combination of a step-by-step feeding-carriage, a rack connected thereto, a pallet normally out of engagement with said rack, a set of numeral keys having means to control said carriage, a universal bar or disk operable by said numeral keys,

a device operated by said universal bar to set said-pallet into engagement with said rack to be operated thereby, a dog device operable by said pallet, means to return the pallet to normal position together With said dog device, a computing mechanism including a member connected to said carriage to have a denominational movement, means to enable said dog to control the starting and stopping of said computing mechanism, and means connected to said keys to determine the extent of movement of said computing mechanism.

5. In a combined typewriting and computing mechanism, the combination of a stepby-step feeding-carriage, a rack connected thereto, a pallet normally held out of engagement with said rack, a set of numeral keys having means to control said carriage, and also having means to move said pallet into engagement with said rack to be driven thereby, a projection upon said pallet, a point being provided along which said projection is driven by said rack to the tip thereof, means to lift or trip said projection past said tip of said point, means toreturn the pallet with said projection to normal position, a computing mechanism including a member connected to said carriage for a denominational movement, a dog connected to said pallet, means connected to said dog to control the starting and stopping of said computing mechanism, and means controlled by said keys to determine the extent of movement of said computing mechanism.

6. In a combined typewriting and computing mechanism, the combination of a stepby-step feeding-carriage, a rack connected thereto, a pallet. yielding means normally holding said pallet out of engagement with said rack, a set of' numeral keys having means tocontrol said carriage, and also having means to move said pallet into en agement with said rackto be driven there y, a projection upon said pallet, a point being provided along which said projection is driven by said rack to the tip thereof, resilient means to lift or trip said projection past said tip of said point and return the pallet with saidprojection along said point to normal position, a computing mechanism including a member connected to said carriage for a denominational movement, and also'ineluding an escapement wheel, a feeding-dog normally restraining said escapement wheel, and means controlled by said keys to deter- -mine the extent of movement of said escapement wheel.

7. The combination of a step-by-step feeding carriage, a set of numeral keys having means to control said carriage, a powerdriven computing mechanism including a member connected to said carriage for denominational movement and also including anescapement wheel, a dog device to control said escapement wheel, an operating lever connected to operate said dog device, a pallet upon said lever, a rack connected to said carriage, means controlled by said keys to move said pallet into engagement with said rack to be driven thereby, means to restore said pallet to normal position, and means controlled by said keys to determine the extent of movement of said escapement Wheel.

8. The combination of a computing'mechanism including a power-driven escapement wheel provided with settable escapement teeth, keys having means to set said teeth, a feeding dog normally restraining said escapement Wheel, a step-by-step feeding carriage controlled by said keys, said computing mechanism including a member connected to said carriage to have a denominational movement, and means controlled by said carriage to operate said feeding dog to release said escapement wheel for a substantial feeding movement upon the initial stroke of the feeding dog.

9. The combination of a computing mechanism including a power-driven escapement wheel provided with settable escapement teeth, keys having means to set said teeth, a feeding dog normally restraining said escapement Wheel, a step-by-step feeding carriage controlled by said keys, said computing mechanism including a member connected to said carriage to have a denominational movement, means controlled by said carriage to operate said feeding dog to release said escapement wheel for a substantial feeding movement upon the initial stroke of the feeding dog, and a detent associated with said feeding dog and normally idle but brought to working position during the releasing movement of said feeding dog, to

effect the arrest of the released escapement wheel upon the operation of the computing mechanism to an extent determined by the operated key. 7

10. The combination of a computing mechanism including a power-driven escapement wheel provided with settable escapement teeth, keys having means to set said teeth, a feeding dog normally restraining said escapement Wheel, a step-by-step feeding carriage controlled by said keys, said computing mechanism including a member connected to said carriage to have a denominational movement, means controlled by said carriage to operate said feeding dog to release said escapement wheel for a substantial feeding movement upon the initial stroke of the feeding dog, and a detent associated with said feedlng dog and normally idle but brought to working position during the releasing movement of said feeding dog, to effect the arrest of the released escapement wheel upon the operation of the computing mechanism to an extent determined by the operated key; means being provided to effect the return to normal positions of said feeding dog and said detent.

11. The combination of a computing mechanism including a power-driven escapement wheel provided with settable escapement teeth, keys having means to set said teeth, a feeding-dog normally restraining said escapement wheel, whereby the release of said escapement wheel for its substantial feeding stroke is efiected upon the initial stroke of said feeding-dog, a detent asso ciated with said feeding dog and normally idle, a step-by-step feeding carriage controlled by said keys, said computing mechanism including a member connected to said carriage to have a denominational movement, and means controlled by said carriage to cause said feeding-dog and detent to re-" ciprocate at each letter feeding movement of the carriage.

12. In a combined typewriting and adding machine, the combination of a powerdriven computing mechanism including an escapement wheel .provided with settable escapement teeth, keys having means to set said teeth, a feeding-dog normally restraining said escapement wheel, a step-by-step feeding carriage controlled by said keys, said computing mechanism including a member connected to said carriage to have a denominational movement, a rack connected to said carriage, a normally ineffective pallet to cooperate with said rack to cause said feeding-dog to release said escapement wheel, and means controlled by said keys to render said pallet effective.

13. The combination of a' power-driven carriage, a pinion meshing with a rack upon said carriage, a toothed wheel connected to said pinion, a pallet to engage said toothed wheel, power-driven computing mechanism having an escapement wheel, means extending from said pallet to said escapement Wheel to enable the movement of said toothed Wheel to release said escapement wheel, a set of type-operating numeral keys, carriage-feeding devic es controlled by said numeral keys, means controllable by any key to move said pallet into engagement with said toothed wheel to be operated thereby at the letter-feeding movement of the carriage, whereby the escapement wheel of the adding mechanism is released, and mechanism extending from said keys to said escapement wheel,'to determine the extent of movement of said escapement wheel; said computing mechanism including a member connected for a denominational step-by-step movement at the feeding movement of said carriage.

14:. In a combined typewriting and adding machine, the combination of a powerdriven carriage,v a revoluble escapement 'mechanism therefor, a revolving rack or wheel connected to said escapement mechanism, a pallet normally disengaged from said revoluble rack, a power-driven computin'g mechanism having a primary escapement wheel provided with settable teeth. a pinion to be engaged bythe projecting teeth, a secondary escapement wheel connected to said pinion, a dog device for controlling said secondary escapement wheel, a rock-shaft connected to said dog device and having an arm, means connecting said arm to a lever whereon said pallet is mounted, type-operating keys connected to said carriage-feeding mechanism, including a set of nuineral'keys, a universal bar or device operated by said. numeral keys, a connection from said universal bar to said pallet to force it into engagement with said revoluble rack, means yieldingly detaining said pallet in normal position, a projection upon said pallet, and a fixed point or trip along which said projection is moved by said revoluble rack; resilient means being provided to cause said projection to cross the tip of said point at the completion of its movement by said revoluble rack, and means being provided to return the pallet to normal position.

15. The combination with a carriage having a rack, of a dog, a pallet connected to said dog to cooperate with said rack to enable the carriage to actuate the dog in such a manner that the primary escapement wheel of the adding mechanism is released by said dog at the concluding portion of the letter-feeding movement of the carriage; the pallet being normally disengaged from said rack during the operation of the usual alphabet keys, but the usual numeral keys having means for moving said pallet into eugagement with said rack so as to cause the pallet to be operated by the carriage.

16. The combination with a' carriage having a rack, of a dog, a pallet connected to said dog to cooperate with said rack to enable the carriage to actuate the dog in such a manner that the primary escapement wheel of the adding mechanism is released by said dog at the concluding portion of the letterfeeding movement of the carriage; the pallet being normally disengaged from said rack during the operation of the usual alphabet keys, but the usual numeral keys having means for moving said pallet into engagement with said rack so as to cause the pallet to be operated by the carriage; the numeral keys controlling the extent to which the primary escapement wheel rotates, but the release of said primary escapement wheel being effected by the carriage independently of the keys so that liability of premature rotation of the master wheel is avoided.

17. In a computing machine adapted to compute digits, the combination with a traveling carriage and an escapement therefor, of a member provided with a series of teeth forming part of said escapement, a slide bar adjacent said toothed member, computing mechanism having an operation ,dependent upon the movement of said slide bar, a lug on said slide bar by which it is caught by said toothed member and drawn along therewith to efiect the computation of a digit, and means whereby said slide bar is released when it has been carried the distance required for the corresponding operation of said computing mechanism.

18. In a combined typewriting and computing machine, the combination with numeral keys and a traveling carriage, of a universal bar controlled by said keys for feeding said carriage, an escapen'ient wheel for so feeding it, a second universal bar, and a computation controlling bar moved by said second universal bar into engagement with said wheel.

19. In a combined typewriting and computing machine, the combination with numeral keys and a traveling carriage, of a universal bar controlled by said keys for feeding said carriage, an escapement Wheel for so feeding it, a second universal bar, a computation controlling bar moved by said second universal bar into engagement with said wheel, and means for disconnecting said second universal bar from said keys.

20. The combination with a carriage and an escapement wheel therefor, of a slide bar norinally clear of said wheel, numeral keys, a universal member operated by said keys to bring said bar into engagement with said escapement wheel, and a computing cs 'apcment operated by said slide bar.

21. The combination with a carriage and an escapement wheel therefor, of a slide bar normally clear of said Wheel, numeral keys,

universal member operated by said keys to bring said bar into engagement with said escapement wheel, a variable feed computing escapement operated by said slide bar. and amaster wheel turned to an extent determined by said computing escapement.

In a computing machine, the combination with numeral keys, a traveling carriage and a variable computing escapement, of a carriage escapement controlled by said keys. a normally ineffective bar for operating said variable escapement from said carriage escapement, and means operated by each numeral key for putting said bar to its effective position.

23. The combination with a carriage, of step-by-step feeding means therefor. a computing mechanism including a variable escapement, numeral keys for setting said va riable escapement, a bar for operating said variable escapement, means for normally holding said bar clear of said feeding means, and means operated by each numeral key for making said feeding means effective on said bar.

24. The combination with a carriage. of step-by-step feeding means therefor, a computing mechanism including a variable escapement, numeral keys for setting said variable escapement, a bar for operating said variable escapement, means'for normally holding said bar clear of said feeding means, printing means associated with said keys, and mean operated by each numeral key for putting said bar under the control of said feeding means, so that said feeding means controls said escapement after the printing means is effective.

2:). In a combined typewriting and computing machine, the combination with a traveling carriage and numeral keys, of a rack moving with said carriage, a computing mechanism comprising a series of computing wheels and a common escapement wheel controlled by said keys, a pallet for governing the action of said keys on said escapement wheel, said pallet comprising a member having a tooth to engage said rack, and means controlled by said keys to move the pallet in a direction to effect such engagement.

26. In a combined typewriting and computing machine, the combination with a traveling carriage and numeral keys, of a rack moving with said carriage. a computing mechanism comprising a series of computing wheels and a common escapementwheel controlled by said keys. a pallet for governing the action of said keys on said escapement wheel, said pallet comprising a movable member having a tooth to engage said rack and by means of which it may be carried with said rack on movement thereof. a spring for returning the pallet to normal position, a spring to lift the pallet at the and insuring that it will be held clear of said ating or indexin rack on its return movement.

27. In a combined typewriting and computing machine, the combination with a traveling carriage, computing wheels and numeral keys, of a source of energy for drivring said computing wheels, an escapement governed by said keys for controlling the movement of any of said computing wheels, a rack moving with said carriage, and means for locking said escapement against complete operation until positively moved by said rack.

28. The combination with numeral keys, of valuating or indexing mechanism for determining the extent of a computation correspondent with the numeral key actuated, a traveling carriage controlled in its movement by said numeral keys, said numeral keys acting to merely set up a computation in said valuating or indexing mechanism, and cause a movement of said carriage, and delaying means for preventing said valuating or indexing mechanism from operating until said carriage has completed its movement, and having its first movement as said carriage completes its movement and having its second movement after said carriage completes its movement.

29. The combination with a register, of a valuating or indexing mechanism for said register, numeral keys for setting said valumeans for said va uating or indexing mechamsm, a traveling carnage, a carnage-controlled trip for oscillating said restraining mechanism, restraining means, said trip being normally inactive, and a numeral-key-controlled shifter for forcing said trip into a position to be operated.

30. The, combination with a register, of valuating or indexing mechanism for said register, numeral keys for setting said valu ating or indexing mechanism, restraining means for said valuating or indexing mechanism, a traveling carriage, a carriage-controlled trip for oscillating said restraining means, said trip being normally inactive, a numeral-key-controlled shifter for forcing said trip into a position to be operated, and means for maintaining said trip in its active position while the key which brought itinto such osition returns to its normal inactive positlon.

31. The combination Witha register, of valuating or indexing mechanism for said register, numeral keys for setting said valuating or indexing mechanism,,restraining means for said valuating or indexing mechanism, a traveling carriage, a carriage-controlled trip for oscillating said restraining means, said trip being normally inactive, a numeral-key-controlled shifter for forcing said trip into a position to be operated, means for maintaining said trip in its active position while the key which brought it into such position returns to its normal inactive position, and restoringmeans for moving said trip to its silent position after action in one direction, so as to permit its movement in the opposite direction.

WALTER IGHT.

- Witnesses:

K. FRANKroR'r, C. Runny.

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