US1226072A - Combined type-writing and computing machine. - Google Patents

Description

F. A. HART.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

mwumcrma HLED ma. 6. 1912.

1,226,072. I amma M 15, 191?,

F. Ax HART.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED JAN-6.1912.

Patented May 15, 1917.

2 SHEETS-SHEET 2.

ATTORNEY WITNESSES:

UNITED STATES PATENT O FICE.

FREDERICK A. HART. OF JERSEY CITY. NEW JERSEY, AssmNo TO UNDERWOOD COM- PUTING MACHINE COMPANY. or NEW YORK. N. Y., A CORPORATION OF NEW YORK.

COMBINED TYPE-WRITING AND COMPUTING IVIACHINE.

To all lr/mm if may (once/'11,

lie it known that l. FHEDICIHCIY' A. HART, a citizen of the Ylllttd States. residing in Jersey City. in the countypf Hudson and State of' New Jersey. have invented certain new and useful lni'provements in Combined v T -'pe'-l\'riting and (oii'iputing Machines, of which the following is a specification.-

, This invention relates to computing mm chines. such as illustrated in patentto Han: son Xe. 905.4121. dated December 1, 1908, and its object is to provide iiieans for -preventing faulty action of the computing mechanism. especially 'when the same is power driven at high speed. r

- 9 The improvements relate particularly to the mechanism whereby teen is' carried over from any computing wheel to the next higher wheel. In said patent, each computing wheel has a tooth which starts into operation a tens-carrying. or carry-over, 'train; and subsequently a power driven set of'spurs completes the movements of all the carry-over trains.

In some cases, especially in rapid o'peratioii thecarry-Over train is liable 'to- .be

- trains; and to prevent this. there is pro. vid'ed a locking edge llpon each of the The spurs also are-liable, under some .cir

cuinstances, especially when rapidly I rotated, to cause overthrow of the carry-over.

' spurs, which edge temporarily occupies a gap in the mutilated pii ionwithwhichthe spur meshes, so that said pinion is posi .tively arrested, and hence cannot overthrow.

Other features and advantages will'her.e'-

inafter appear. I In the accompanying drawings,

Figure l is-a diagrammatic sectional side elevation ofa combined typewritingand 'cOmputingmaoliine of the Underwood- Hanson type, showing the present improvemerits applied thereto; the parts being in;

normal positi0ns;

.Fig. 2 is at-perspective rear view of the lock which prevents'overthrow of the carryover trains when they are started into -bars 30, 31.

Specification of Letters Patent. Patented )Ia y 1 5, 1917,.

Application filed January 6, 1912. Serial No. 669,751. Y i

action, together with the mechanism Whereby thelock is withdrawn; the parts being in normal positions.

Fig. 3 is a sectional side elevation of thecon'i'puting wheels, tens carrying trains, and spurs for driving the latter; the parts all in normal positions.

Fig. 4 is a sectional rear elevation of the parts seen. at .Fig. 3.

Fig. 5 is a view similar to Fig. 3, but showing the first lockwithdrawn; and the tens-carrying train as being rotated by its driving spur. I

Fig. (3 'is a View similar. to Fig. 5,'but showing the "movement. of the carry-over train as having been completed by said spur; the latter .being still. in LHOtlOII, and.

the locking edge thereon occupying the adjacent gap inthe mutilated pinion, whereby overthrow of said pinion is prevented- Fig. '7 shows the clutch for the spur shaft which drives'the carry-over trains.

Numeral keys 1 of the typ'ewriterdepress levers 2-t0 1b11t6 l38ll cranks 3, to swing ter is driven by a spring-barrel 7,-and has a rack '8 meshing with a pinion 9', connected to escapement wheel- 10,which is controlled by dogs 11; said dogs operatedby a uni Yersal bar which is driven by heels 1.3 onthe'type bars. 'I y Said keys 1 have stemslito depress arms type bars 411p to print against aplaten 5, \YlllCll lS mounted on a carriage- 6. The lat- 15 on rock shafts 16,'forining partsof linkages 17, which are depressed by said keys to engage and depress CQlllPlltiltlOlTPlllS 18,

the latter suitably nrounted on bars 19.

These bars 19 are elevated one at a time,

through the instrumentality of a (lo- 20011 the carriage 6. saidjdog engaging jacks .21 one. after another, to depress. links 22. and vibrate'levers 23, which engage linkages 2T.

to raise'the reariends of said bars 19 sew atzm.

After the keys 1 have been depressed to print the desired number on the worksheet, theoperative pulls forwardly a handle 25, which is provided upon a rock sl'ia-t't' '26, the

latter extending across the inacliine,pand

having at its ends segments 27, which mesh with idle pinions '28, meshing with opposite racks 29, which form partsof the general operatorif said racks connected by cross "The forward movement of said handle carries the general operator forward, and cross-bar engages such pins 18 as have been depressed by the keys, and drives for- -W.ard the bars 19 accordingly; said bars j having ontheir forward ends racks 32 to mesh Withp'inions 33, which are connected to dialwheels 3 4; the latter loosely mounted on an a-rbor 35.

The dial wheels are provided with teeth 36 for starting their tens-carrying trains; and 'each tooth 36, once in each revolution of its wheel, engages one of the teeth in a pinion 37 to start the tens-carrying train, of which said pinion forms apart. This is done while the dial wheel 34: is moving 13pm 9 to 0; said tooth 36 moving from the dotted-line position to the full-line position at Fig. 3; and the pinion 37 (which has'nine teeth) moving one-ninth of a revol ution to the Fig. 3 position.

Fixed to said pinion 37 is a three-toothed pinion 38, to mesh with a gear 89 provided on the dial wheel 3i ofnext higher denomi- 113M011. Each tens-carrying t 'ain turns onethird of a revolution, at each complete operation thereof; and hence has three normal positions, one .of which is seen at Fig. (3.

The operation of a tens-carrying train (after the latter has been started by the tooth 36 during the forward stroke of the generaloperator 29) is completed during the return stroke of said general operator, by one of a set of spurs forming in effect. gears *0, fixed upon a transverse shaft l1, which is driven from the rack 9 through anidle pinion l2, and a pinion 43 meshing therewith and mounted upon shaft 41. Pinion 43 has a clutch connection to said shaft, so as to revolve idly during the forward stroke of the general operator. but to make a completerevolution of the shaft l1 during the return strokethereof. The clutch connection comprises a ball 44 fitted in a pocket 5 in the shaft, and pressed by a spring 46 ;into a recess 47 in pinion t3; the ball connecting the'pinionand shaft during the'return stroke of the pinion. but releasing the shaft during the initial stroke 'of the pinion.

The spurs l0 are placed in spiral or helical order along the. shaft 11, so as to operate the ten-carrying trains sc/v'uzz'm. When any tens-carrying train isin normal positioiQFig. (3. it is inoperable by its spur 4-0, since the pinion 37 is mutilated, every third tooth being cut away. as at 48. to make a clearance for the spur 40. So long as a tens-carrying train remains in normal position, the shaft 11 may revolve idly with respect thereto. .But when a train is started from the Fig. 6 position to the Fig. 3 position, one of the uncut teeth of the pinion I moves into the path of its spur 40, and the latter, therefore, at the ensuing movement carrying train when. it is started by the tooth 36 on any dial or computing wheel, there is provided an intercepting or stop bar l9, normally in the path of one of the three teeth of pinion 38, as at Figs. 1, 2 and 2-5; this stop member being placed at such a point as to prevent the tens-carryii'ig train from moving substantially more than oneninth of a revolution. This stop bar has slots or clearances 50 for the computation racks In order to permit movement of the tensc'arrying trains to be completed by the associated spur 40, a releasing connection is made between said stop bar 49 and the spur shaft -11, and the bar is made depressible, being arranged to slide down in guideways 51 in end plates of the computing head. Arms- 53, pivotally engaging openings or bearings 54 in said intercepting bar, are mounted upon a horizontal rock shaft 55; and fromone end of said shaft extends upwardly an arm 56, having at its top a tooth 57 normally seated in a notch 58 in a disk 59, fixed upon the normally stationary spur shaft 41. The leading edge of the notch is inclined to form a cam. and at the beginning of the movement of shaft *1, it acts upon the bevel tooth 57 to cam arm 56 forwardly and the arms downwardly, to depress the bar 9 and the stops thereon out of the paths of all the pinions 38. The bar remains in this position during the passage of the spurs 4 past the tens-carrying trains; and at the latter part of the revolution of the shaft 41. springs 60 lift the bar 149 and snap the tooth 57 into the notch 58 again. Hence the bar 49 is in position to prevent overthrow of any tens-carrying train ,at the starting movement thereof, but is withdrawn so as to permit the completion of the movement of all the tens-carrying trains that. are started. In order to prevent overthrow of the tens carrying trains'when they are revolved by the spurs 40, each spur is provided with a locking mm or edge or broadened tooth 61, one of these being shown in operat ve position at Fig. 6, in which it will be seen that,

as soon as the spur 4O completes the rotation .iig' 'a- Genev'a lock with said pinion. The spur. as will be seen, has two teeth, and the lower tooth may merge intosaid locking edge (31 'as illustrated. and said edge may be so long that it will remain in the path of the succeeding pinion tooth until possibility of overthrow thereof is eliminated.

By reason of the provision of theselock ing devices against overthrow. it 'is also-'ren dered practicable to weakenthe springs 62 which connect the detents 63 andGl for the gears 39 and 37 respectively. so that the computation wheels are operated more easily and quietly.

Variations may be resorted to within the scope of the invent-ion and portions of the improvements may be. used without others.

Having thus described my invention; I "claim:

l. The combination with 'compi'itation wheels. carry-over trains, said wheels having teeth to start said carry-over trains, andgears to complete the movements of 'said carry-over trains. of stop devices normally in position to prevent overthrow of said early-over trains when started by said wheels. and means for automatically with drawing said stop devices during the operation of said gears.

2. The combinatiori with computation wheels. carry-over trains, said wheels having teeth to start said carry-over trains, and gears to complete the movements of said carry-over trains,'of stop devices normally position to; prevent overthrow of said pcarry-over I trains when started by said wheels, a rotatable shaft on which said gearsaremounted .an actuator on said shaft, and

means.to-enablesaid actuator to withdraw said stop devices.

3;The comb nation with computation wheels. carry-over trains, said wheels having teeth. to start saidcarry-over trains. and

gears to complete the movements of saidcarry-over trains, of stop devices normally in position to prevent overthrow of said carry-over trains when started by said .wheels. a rotatable shaft on which said gears are mounted. an actuator on said shaft, means to enable said actuator to withdraw said stop devices, and 'a spring to restore said stop devices to normal positions.

4. The combination with computation -wheels, carry-over trains, said wheels having teeth to start said'ca rry-over trains.' and gears to complete themoveinents of said. carry-over trains. of a rotatable shaft carry ing said gears. a stop bar in position to pre- 1 vent overthrow of the carry-over: trains when started by said wheels, a rock shaft having an arm to withdraw said stop bar,-

a cam on said gear-shaft, a connection I from said cam to said rock shaft to withdraw said stop bar at the beginning of the rotation of the gear shaft, and a spring'de- I 'ing it when it is set.

vice to restore the bar and roclv' shaft to normal positions at the conclusion of the movement of said gear shaft.

- 5. The comh ination with wheels. carry-over trains-said wheels having teeth to start said carry over trains. and gears to complete the movements of said earryrpver trains of means to prevent over.- throw of the caruv-over trains when started by said wheels. and means to release said cairy-over trains for actuation by the gears brought into action concomitantly with the movement of said gears.

6. In a computing machine, the comhina tion with computing wheelsand numeral keys. of computation members in which numbers are temporarily set up by said keys.-

a separate device for running said numbers set up into said wheels a carry-over wheel for each computing wheel but normally disconnected therefrom, means on each com- PUUn-g wheel for giving its carry-over wheel.

a turn as it is moved by said separate device, a plate normally effective to prevent said turn from being excessive. and means for moving said plate to ineffective position.

7. In a computing machine. the comhinationwith computing wheels and numeral keys, of computation members in which numbers are temporarily set up by said keys, a separate device for running said numbers set up into said wheels, a carry-over wheel for each computing wheel but normally dising wheel for giving its'carry-over wheel a turn as it is moved by said separate device in running in numbers. a plate normally effective to prevent said turn from being excessive. means for causing said separate device to give said turned. carry-over wheels an additional turn after the computing wheels have been turned by said'device, and means for moving said plate to ineffective position by, said after-movement 'of said device.

8. In a computing inachme, the combination with a carry-over wheel adapted tobe set and later operated, of a stop for arrestand a stop for arresting it when it is operated.

move said plate to ineffective position during the rotation of said shaft, but normally allowing said plate to lie in effective position.

' i 10. In a computing machine, the combinacomputation connected therefrom, means on each computcarryover wheel so that the remaining teeth in its mutilated gear will be engaged. by said shaft gears and the carry-over wheel be turned thereby, means for arresting each carry-over wheel in its effective position. and means "for moving said arresting means to ineii'ective position by the operation of said shaft.

11. In a computing machine the combination of a series of carry-over wheels with a series of computing wheels therefor, said carry-over wheels and said computing wheels being normally disengaged, a detent for each carry-over wheel engaging it with a force sullicient only to hold it against displacement when disengaged from its computing wheel. a tooth for each computing wheel for advancing its carr over wheel while still under the control of its detent and means for positively arresting said carry-over wheel in correct position when so advanced.

12. In a computing machine the combination of a series of carry-over wheels with a series of computing wheels therefor, said carry-over wheels and said computing wheels being normally disengaged, a detent for each carry-over wheel engaging it with a force sufiicient only to hold itagainst displacement when disengaged from its computing wheel. a tooth for each computing wheel for advancing its carry-over wheel while still under the control of its detent, means for positively arresting said carryover wheel in correct position when so advanced, means for engaging the advanced carry-over wheel and moving the same to turn said carry-over wheels against the force of said detent, means to prevent overthrow of said carry-over wheel when moved by said turning means and means brought into action upon movement of said turning means to withdraw the arresting means from said carry-over wheel so that they may be turned to carry.

13. In a computing machine, the combination with an array of carry-over wheels, of an array of computing wheels with which they are associated, said carry-over wheels and said computing wheels being normally disengaged, a light dctcnt for each carryover wheel normally holding it against displacemen a tooth on each computing wheel for advancing its carry-over wheel while essors still under the control of itsdetent, means for positively "arresting said carry "cr wheel in correct position when so advanced. a shaft adjacent said carry-over wheel, actuating means on said shaft, arranged to engage. said carry-over wheels at their ad vanced positions and to turn said carry-over wheels, and locking means on said shaft to hold its carry-over wheel locked when turned by saidactuatin means.

14:. In a computing machine, the combination with computing wheels and carr \"-over wheels, of two locks for said carr vover wheels, means normally tending to make one lock effective, means connected to the other lock to move the carryover wheels, and means for making the first loch ii'ie'lliective by moving the second loci; to operate the carry-over wheels and then lock them.

'15. In a computing machine, the combination with 'comi'iuting wheels. carry-over wheels for said con'iputing wheels which are preliminarily set by said computing wheels and subsequently operated to carry, an arresting means for each carry ovcr wheel normally held in position to prevent overthrow of said wheel when preliminarily set, means to complete the turning of said carry-over wheels and a device moved by said turning means to move said lock to inei'lective position.

16. A computing machine having computing wheels and carry-over wheels. each of which may be set by its corresponding com-' puting wheel; and comprising in combination a. lock for preventing the overthrow of said'carry-over wheel when being set, and means for afterward completing the turning of the carry-over wheel. I

17. A computing machine having computing wheels and, carry-over wheels. each of which may be set by its corresponding computing wheel; and comprising in combination a lock for'preventing overthrow of said carryover wheel when being set, means forafterward completing-the turning of the carry-over wheel, and a lock for preventing overthrow of said carry-over wheel when so turned, the turning of the carry-over wheels acting to withdraw the first lock and render the second look active.

18. A computing machine having computing wheels and carry-over wheels, each of which may be set by its corresponding computing wheel; and comprising in combina tion a lock forpreventing overthrow of each carry-over Wheel when being set, means for positively moving said lock to ineffective position, and means for postively turning said carry-over wheel when said lock has been moved. to ii'icffective position.

19. A computing machine having computing wheels and carry-over wheels, each of which may be set by its corresponding computing wheel; and comprising in come bination a lock for "preventing overthrow of each carry-over wheel when being set, means lock for preventing overthrow of said carryover wheel when so turned, brought into action by said moving means.

20. In a computing'machine, the combination with computing wheels-01" members in which numbers are temporarily set up, carry-over wheels, and means whereby said carry-over wheels are driven both directly and through the computing wheels, said driving means including devices whereby the carry-over wheels are locked against over-throw during the driving action.

21. In a computing machine, the combination with a device in which numbers are temporarily set :up, .of computing wheels, means for carrying the-numbers so set up into said computlng wheels, carry-over wheels, means for driving said carry-over I wheels, and two kinds of locks for preventing overthrow of said carry-over wheels, brought into action at different times by said driving'means.

22. The combination with computing wheels and carry-over trains; detents for yieldingly holding said trains normallyineifeotive; said wheels having teeth. to start said carry-over trains teeth forming part of said trains to cooperate with said detents, driven gears also cooperating with said teeth position.

to complete the movement of said carry-over trains against the action of said detents and to cooperate with said detents in preventing said trains from overthrow after movement by said gears.

23. In a computing machine, the combination with computing whee s and carry over wheels therefor, which carry-over wheels are preliminarily set by said computing wheels and afterward operated to carry, driving means for said computing wheels and said carry-over wheels, means for interposing a stop so that said carry-over wheels are not overthrown during the preliminarv,

setting thereof by said computing wheels and means for positively arresting said carry-over wheels when completely operated by saiddriving means. Y

24:. The combination with a carry-over wheel, and means for setting from ineffective to effective position, of means for preventing overthrow of said wheel when so set, an assisting segment for engaging the set'carryover wheel and including an arm having a driving spur and a cam fixed to move with said spur and having a definite relative position with respect thereto and means operated by said cam for moving said overthrow preventing means to inefiective FREDERICK A. HART. Witnesses:

K. FRANKFORT,

. C. RIPLEY.

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