US1279687A - Combined type-writing and computing machine. - Google Patents

Combined type-writing and computing machine. Download PDF

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US1279687A
US1279687A US67705212A US1912677052A US1279687A US 1279687 A US1279687 A US 1279687A US 67705212 A US67705212 A US 67705212A US 1912677052 A US1912677052 A US 1912677052A US 1279687 A US1279687 A US 1279687A
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carriage
wheels
sets
master
computing
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US67705212A
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Hans Hanson
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UNDERWOOD COMPUTING MACHINE CO
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UNDERWOOD COMPUTING MACHINE CO
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/0227Cooperation and interconnection of the input arrangement with other functional units of a computer

Description

H. HANSON. COMBINED TYPE WRITING AND COMPUTING MACHINE APPLICATION FILED FEB. 12, I9I2- Patented Sept. 24, 1918,
3 SHEETS-SHEET I.
iQ ENVENTOR Wawd'v MMM BY ATTORNEY H. HANSON COMBINED TYPE WRITING AND COMPUTING MAGHINE.
APPLICATION FILED FEB. 12. 1912.
1 ,279,687. Pafented Sept. 24, 1918.
3 SHEETS-SHEET 2.
WITN ESS ES: 3 IN VEN T0 R: #fi III// ATTORNEZ y'cw zw a H. HANSON COMBINED TYPE WRITING AND COMPUTiNG MACHINE.
APPLICATION HLEDJ EB- I2. 1912. 1,279,687. PatentedSept. 24, 19185.
3 SHEETSSHEET 3.
WITNESSES:
INVENTOR:
MM BY ATTORN Y Kill rrnn STATES PATENT OFFICE.
HANS HANSON, ()F HARTFORD, CONNECT ICU'I, ASSIGNOR, Br MESNE nssrenmsnrs,
To ortntinwoon oomrornve MACHINE COMPANY, on NEW some, it". Y,, it comes RATIGN' OF NEW YORK.
GGMBINED TYPE-WRITIl TG AND -COMPUTIN G MACHINE.
inmost.
Specification of Letters Eat'ent.
Patented Sept..24, 1918..
Application filed February 12, 1312. Serisi No. 674?,052.
To all whom it may concern:
Be it known that I, HA s HANSON, a citizen of the United States, residing in Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Combined Type- Writing and (lomputin Machines, of which the following is a speci cation.
This invention relates to computing ma chines of the kind in which pins or devices are set by means of numeral keys and are then caused to cooperate with dial wheels to determine the extent of rotation of the latter.
One of the principal objects of the invention is to enable a single set of such key-set pins or devices to cooperate with any of a. series of sets of dial wheels.
The invention is illustrated in connection with s combined typewriting and computing machine oi. the Unclerwoodl-lansoii type, in which the key-set pins are carried upon rack bars, these rack hers having teeth which mesh with pinions to turn the diahwheels. In carrying out my improvements, 1' substitutc for the dial wheels a set of master Wheels, and Ii wheels upon a carriage; so that by moving the carriage, any desired set of dial wheels can. he brought into conjunction with the single master set, .The paper-carriage of the type-writing machine is provided with a series of dogs, one for each of the sets of dial wheels, and these dogs, one after another, operate the denomination devices which select the pin bars or racks which-are to cooperatewith the keys. Hence during a single run of the paper carriage all of the dial wheel sets can be operated one after another by the same set of master wheels.
Other objects and advantages will hcreinafter appear. v
In the accompanying drawings,
Figure 1 is a sectional side elevation of a combined typewriting and computing machine embodying the present improvements.
Fig. 2 is a plan of the dogs on the paper carriage of the typewriter and the denomination jacks opc'nted thereby.
Fig. 3 is a sectional elevation similar to a. portion of Fig i but on a. lei-o'er scale.
Fig. 1 is a similar to Fig. 3, hot showarrange e'series of sets of dial ing one of the sets of dial wheels meshing with the set of master wheels.
Fig. 4c? is a. plan of one train of dial wheel, master wheel and tens carrying mechanism, the parts in'normel positions.
' Fig. 4: is a detsil section showing the onewey clutch connection whereby the carryover assistingsheft is driven solely during the return movei'nent of the general operator.
Fig. 5 illustrates the normalposition of the feeding dog of the carriage which carries the dial wheels; and Fig. 6 illustrates the so normal position thereof.
'Fig. 7 is a general plan of the computing mechanism in the base of the machine.
Numeral keys 1 of the'typew'riter depress levers 2 to vibrate bell cranks 3,- to swing type bars up to print against a platen 5, which is mounted on a carriagedv The latter is driven by a spring-barrel 7, and has a rock 8 meshing with a pinion 9, connected to escapement wheel 10, which is controlled by dogs 11; said dogs operated by a universal. bar 12, which is driven by heels 13 on the type bars. v
Said lreys 1 have stems it to depress arms 15 on rock shafts lid, "forming ports of linkages 17, which. are epresscd by said keys to so engage and depress computing pins 18, the latter suitably mounted on bars 19. These bars 19 are elevated one at a time, through the.instrnmentolity of one of the dogs on. the carriage 6,. said dog engaging jacks 2?. one after another, to depress links and ii brate levers 23, which engage linkages to raise the rear ends of said bars 19 seriatdm. As stated above, there is one of the dogs 20 for each column in which computing is done. After the .lzeys l have been. depressed to print the desired number on. the work sheet, the operative pulls forwardly a handle 95, which is provided upon s. rock shait 26; the letter extending across the machine and having at itsends segments 27, which mesh with idle pinions 28, meshing with o osite racks which form parts of the tor: said racks connected l The forward movement oi s carries the cross-bar 30 engages so been depressor by l word the bare it see handle 25 id drives forsaid hers haw a time to the master set of computing wheels. The dial wheels have ten peripheral teeth 38, which may mesh with the teeth of the master wheels 34; and upon the several teeth 38 are provided numerals to be read for the LEiifll purpose. The carriage may be a box-like structure, as illustrated, and may have a front roll 39 to run on a rail 10 and rear rolls 41 to run on a rail 42.
The rail 42 may be rounded, and the rolls 41 may be made concave so that there may be a pivotal or hinge action, to permit the carriage to rock from the Fig. 3 position, in which the dial wheels 36 are out of mesh, to the Fig. 4' position, in which one of the sets of dial wheels is in mesh with the master set 34:. By this means, any rotation of the master wheels 34?, which is effected by the racks 32, is transmitted to the dial wheels 36 which are in mesh therewith, the dial wheels of the other sets not being affected,
The keys 1 having been operated to print the numerals upon the work sheet, and the carriage 37 having been adjusted along its tracks to bring a set of dial wheels opposite the master set 34, the general operator handle 25 is pulled, and the carriage 37 is swung to bring the dial wheels into mesh with the master wheels before the latter begin to turn; there being-some lost motion of the general operator 2f) before the pinoperating bar 30 engages the first depressed pin 18. This backward swinging or shifting movement of the carriage 37 is effected by a lever 43, pivoted at 44 upon the framework and carrying at its forward end a roll 45, which bears down upon a bar or plate 46 upon the carriage, to depress the rear portion thereof and swing the dial wheels hack- \\'ardly.- The lever is operated by means of a cam disk 4.7 which rotates in opposite directions during the forward and backward movements of the.general operator, being i'or purpose provided with a gear 48, which is connected by an idle gear 49 to one of the racks 29 of the general operator.
The cam disk has in its edge a depression 50 in which norn'ially rests a roll 51 provided upon the rear end of said carriage :nvinging member During the forward stroke of the general operator, the roll 51 is forced out of the notch, thus vibrating the lever to swing back the dial wheel carriage, During the remainder of the stroke of the disk 47, said roll 51 rides upon its periphery, thus holding the carriage 37 with the selected set of dial wheels in mesh with the master wheel 34:. The disk 47 need not make quite a full revolution, and the roll 51 need not, therefore, drop into the notch 50 at the completion of said forward stroke of the general operator, but may remain upon the circular periphery of the disk 47 until the latter returns to normal position, thus holding the dial wheel set in mesh withthe master set during the tens-carrying operation which occurs during the return stroke of the general operator.
It will be understood that at the completion of the return stroke of the general operator and of the disk 47, the roll 51 will drop again into the notch 50, thus permitting the carriage 37 to swing by gravity to its forward or normal position.
Upon each of the' dial wheels 36 is provided a starting tooth 52, forming part of a tens-carrying or carry-over mechanism; andWvhen the dial wheels are in the F ig'. 4 position, any starting tooth 52 may effect aii operation gt a tens-carrying train, 2 the principal members of which comprise a nine-toothed pinion and a three-toothed pinion 54 fixed to pinion 53. The tooth 52 operatesthe pinion'53 by means of an intervening idle pinion 55. These idle pinions are mounted loosely upona fixed arbor 56; and the pairs of pinions 53, 54; are mounted loosely upon a fixed arbor 57. The threetoothed pinio 54 is in position to operate the master wheel 34. of next higher denomination, but is normally out of mesh therewith, as will be understood at Fig. 3. The starting tooth turns the double pinion 53, 54 in the direction of the arrow from the Fig. 3 position to the Fig. 4, position, and thus brings the pinion 53 into position to be engaged by its associated driving spur 58, which operates during the return stroke of the general operator 29. Every third tooth on the pinion 53 is cut away, as at 59, to make a clearance for the associated spur 58, so that the spur cannot turn the tens carrying train unless the latter has been first started by the tooth 52.
Thus it will be seen that the dial wheels 36 are provided with teeth 52 for'starting their respective tens-carrying trains; each tooth 52, once in each revolution of its wheel, engaging one of the teeth on the pinion 55, for this purpose. This is done while the dial wheel 36 is moving from 9 to 0, the pinion 53 turning one-ninth of a revolution from the Fig. 3 position to the Fig. 4 position; while the operation of the tenscarrying train is completed, during the return stroke of the general operator, by onel spur 58 of a set which is fixed upon a trans verse shaft 60, which is driven from the rack 29 through idle gear 49, an idle pinion during the return stroke ofthe pinion, but
respect thereto; but when a train is started from the Fig. 3 position to the Fig. 4 position, enact-the uncut teeth of thepinion 53 moves'into the path of its spur 58, and the latter therefore, at the ensuing rotation of the shaft 60, drives the tens-carrying train and advances the next higher master wheel 34 and hence the dial 36 with which the latter meshes, the shaft 60 thereafter completing its revolution to normal position, being held in normal position by a spring detent, not shown herein but disclosed in United States Patent No. 816,319, granted to me March 27, 1906', and in the pending application of F. A. Hart, No. 466,836, filed DecemberS, 1910.
It will be'noticed that the pinion 33, in each instance, is connected to its computation wheel 34 by means of a ratchet 68 and a pawl 69, to permit the computation wheel to'be adyanced by the tens-carrying train independently of its rack 32,
The master wheels andthe dial wheels are all driven by both the racks 32 and the spurs 58, while the carriage 37 is in its Fig. 4 position; and at the conclusion of such operation, the carriage may return to its normalFig. 3 position, thus disconnecting the dial wheels from the master wheels. The latter may have spring detents 70, and each set of dialwheels may have a single detent bar 71 pivoted at 72 to the carriage and pressed by a spring 73 into engagement with all of the dial wheels in the set. When the carriage is being swungback from Fig. 3 to Fig. 4, an arm 74 on said detent bar is intercepted by a trip 75, and all the dial Wheels in the set move out of engagement with said bar detent 71 as they move into mesh with the master wheel 34; there being preferably no point in which control of the dial wheels is lost.
The feeding movement of the dial wheel I carriage 37 is effected by a spring-76 which is connected.by a cord 77 to apia, 78 the carriage 37, and tends alwaysto drawthe carriage to the left at Fig. 7. Upon the carriage is a rack comprising a series of teeth 79, one foreach computing head 36, of which there may be as many as desired upon said carriage; the lattermay of course be of any desired length, in order to accommodate any required number of computing heads.
A dog 80 is normally in engagement the teeth of rack 7 9 and restrains the same against being propelled by said spring 76. When, however, the carriage is swung the Fig. 4 position, the rack is swung down. of engagement with said pawl or dog 86 into engagement with a fired or 81, so that the latter temporarily resti the carriage from travelingr Whiie recur 7 9 is so depressed, a spring 82. snaps the dog 80, which is pivoted at 83 upon the framework, from a normal pom'tion at Fig. 5 past the-tooth 79 from which it has just escaped. The position at Fig. 6 corresponds with t! at Fig. 4. Upon the return of ti e carria e 37 to normal forward position, 3, rack 79 escapes from the detent 8i and rises to permit its succeedingtooth 73 to engage the feeding dog 80, as at Figs, 3 and 5; carriage 37 of course making a jump equal to the distance between the teeth 79, which isequal to the spacing of the dial wheel heads 36 at Fig. 7. After a line of writing is completed and the paper carriage 6 cl? the typewriter has been returnedto begin a new line of writing, the carriage 37' may we be returned by hand to bring the first or any desired adding head thereon. into positidn for coiiperating with the master wheel set- 34.
Variations may be resorted to within the L scope of the invention, and portions oi the improvements may be used without others.
Having thus described my invention, l claim:
1. Ina computing machine, the combination with a series of actuating racks, oi a master set of wheels driven thereby in one direction, a plurality of sets of dial wheels, said dial sets adjustable in one direction to bring any selected set of dial wheels to lmaster set, and also movable in another direction to bring the selected set of dial wheels into mesh with said master set to be driven thereby, and carry-over gears mesh ing with said master set of wheels.
2. The combination of a single master set of computing members, means for operating them concurrently including a general oper ator, a carriage, a series of sets of dial wheels on said carriage, said carriage sets operator for feeding the carriage to bring the sets successively/into position for cooperation with said master set.
3. In a computing machine, the combination with a series of actuating racks, of a master set of wheels driven thereby, a plurality of sets of dial wheels, any set of which may be controlled by said master set of wheels, a general operator, means controlled thereby for driving said master set of wheels and the cooperating set of dial wheels on one stroke of said general operator, carrying mechanism, means for initiating a carrying-operation by the wheels of any active set of dial wheels, and means for completing the carrying-over operation on the active set of dial wheels on the return stroke of the general operator.
4. The combination of a master set of computing wheels, means for operating them concurrently, including a general operator, a carriage, a series of sets of dial wheels on said carriage, said carriage sets engageable one at a time with said master set to be operated thereby, means connected to said general operator for feeding the carriage to bring the sets successively into position for cooperation with said master set; said series of sets being mounted on said carriage out of position for meshing with said master set, and means also dependent upon said general operator for moving said carriage sets into mesh with said master set.
5. The combination with a master set of computing members, of means for operating them'concurrently, a carriage, a pair of separate tracks on which said carriage normally runs, and a series of sets of wheels mounted on said carriage out of mesh with said master set of members, said carriage being tiltable or shittable about one of said tracks as a fulcrum and away from the Other track to bring any of its sets into mesh with said master set to be operated thereby.
6. The combination with a master set of computing devices, of means for operating them concurrently, a carriage, a series of sets of computing wheels mounted on said carriage out of mesh with said master devices, said carriage being tiltable or shiftable to bring any of its sets into mesh with said master set to be operated thereby, and means for feeding the carriage; said operating means including a general operator, and means controlled by said general operator for shifting said carriage to bring any of its sets into mesh with said master set.
7. The combination with a master set of computing wheels, of means for operating them concurrently including a general operator, a carriage, a series of sets of dial wheels mounted on said carriage out of mesh with said master set of wheels, said carriage being tiltable or shiftable by said general operator to bring any of its sets into mesh with said master set to be operated thereby, and
an escapement mechanism including a part on the framework and a second part on the carriage to shift with the latter relatively to the first part at the operation of the general operator.
8. The combination with a master set of computing members, of means including a general operator for operating said members concurrently, a carriage, two tracks on which the carriage normally runs, aseries of sets of computing wheels mounted on said carriage and normally out of mesh with said master set of members, a rotary cam connected to said general operator, and means controlled by said cam for tilting or shifting said carriage about one of its tracks as a fulcrum, to bring a set of wheels thereon into mesh with said master set.
9. The combination with a master set of computing members, of means including a general operator for operating said members concurrently, a carriage, a series of sets of computing wheels mounted on said carriage and normally ut of mesh with said master set of members, means controlled by said general operator for shifting said carriage to bring a set of wheels thereon into mesh with said master set, a driving spring for said carriage, and an escapement mechanism including cooperating parts, one of which is mounted on said carriage to be efiectively operated thereby at the wheel-shifting movement of the latter.
10. The combination of a master set of computing wheels, a general operator for operating said wheels concurrently, a carriage, a series of sets of computing wheels on said carriage, said carriage sets engageablc one at a time with said master set to be operated thereby, and-a set of tens-carrying or transfer trains dependent upon. the carriage wheels but mounted upon the framework of the machine to cooperate with said carriage sets through said master set one after another.
11. The combination of a master set of computing wheels, a general operator for operating said wheels concurrently, a carriage, a series of sets of computing wheels on said carriage, said carriage sets engageable one at a time with said master set to be operated thereby, a set of tons-carrying or transfer trains dependent upon the carriage wheels but mounted upon the framework of the machine to cooperate with said carriage sets one after another through said master set; said carriage sets being normally out of position for cooperating with said master set and said tens-carrying trains, and means for moving said carriage sets into engagement with said master set and said tenscarrying trains.
12. The combination of a master set of computing Wheels, a master set of tens-oarrying or transfer trains operating through said master set of computing Wheels, a gen-- eral operator for said sets, a carriage, and a series of sets of computing Wheels on. said "carriage, said carriage sets engageable one at a time With both of said master sets to be operated concomitantly thereby; the Wheels on said carriage having devices to inltiate the tenscarrying operations. 1 13. The combination of a rel atively stationprising a pinion, each Wheel in each of said carriage sets having a tooth for starting said pinion, and each of said tens-carrying tra ns also comprising a second pinion in mesh onto the first and having a third pinion to engage the computing Wheel of next higher order in said master set; said general operator including means for engaging said tenscarrying trains .to drive the same.
14. In a combined typewriting and conr puting machine, the combination with a letter-feeding carriage, of a master set of computing Wheels, several complete sets of readable dial Wheels all normally out of engagement with said master set, said sets adjustable in one direction independently of said letter-feeding carriage, to bring any selected set of dial Wheels to said master set, and also movable in another direction to bring the selected set of dial Wheels into mesh or cc iperation with said master set, and means, including a set of numeral keys and denominationseleoting devices, to coiiperate with said letterdeeding carriage for controlling the operation of said master set upon said dial sets successively, during a single run of the letter-feeding carriage.
15 The combination With a master set of computing Wheels, of a carriage, sets of readable dial Wheels upon said carriage, said dial Wheels normally out of engagement with said master set, said carriage movable one direction to any selected set of dial Wheels to said master set, and movable in. another direction to bring the selected set of dial Wheels into mesh or eoiiperation with said master set, a letter-feeding carriage, and means to cooperate therewith for controlling the operation of said master set once for each of said sets dial Wheels during a single run oi. said letter-feeding carriage.
16. The combination master set of computing devices, means for operating them concurrently, a carriage, a series of sets of computing Wheels on said carriage, said carriage sets engageable one at a time with said master set to be operated thereby, devices for feeding the carriage to bring the sets successively into position for cotiperation with. said master set;said series of sets being mounted on said carriage-out of position for meshing with said master set; and means for moving said carriage sets into and out of mesh with said master set and concomitantly effecting an operation or said feeding devices.
17. The combination of a master set of computing devices, a general operator having' means for operating them concurrently, a carriage, a series of sets of computing Wheels on said carriage, said carriage sets engageable one at a time with said master set to be operated thereby, means controlled by said general operator for feeding the can riage to bring the sets successively into position for cooperation with said master set; said series of sets being mounted on said car riage out of, positioni'or meshing With said master set; and means connected. to said general operator for moving any of said can riage sets into mesh With said master set and holding it there.
18.. lhe combination with a master set of computing members, of means for operating them concurrently, a carriage, a hingarail or track therefor, a series of sets of computing Wheels mounted on said carriage out of mesh with said master members, said carriage being tiltable on said track to bring any of its sets into mesh with said master set to be operated thereby, means to tilt the can riagc, and means connected to said tilting means for feeding the carriag.
19, The combination of a relatively stationary master set of computing Wheels, a general operator for operating said Wheels concurrently, a carriage, a series of sets of computing Wheels on said, carriage, said carriage sets engagcable one at a time with said master set to'be operated thereby, a relatively stationary set of tens-carrying or transfer trains to engage and drive Wheels in said. master set and mounted upon the framework of the machine to coiiperate with said carriage sets one after another; said carriage sets having means for initiating the tens-carrying operations and being normally out of position for cooperating with said master set and said tens-carrying trains,
means for moving said carriage sets into engagement with said master set to be driven thereby and also with said tens-carrying trains, to imtiate the movements oi: the latter; said general operator having means to drive the tens-carrying trains that have been started by the Wheels in any carriage set, each-tens-carrying train comprising a partly mutilated power-driven pinion, a second pintill its
lid
ion to engage the master wheel of next higher denomination, and a third pinion in mesh with the first and in position to be engaged by the starting teeth of the momentarily associated carriage computing wheel.
20. The combination with a relatively -sta'- tionary master set of members, of a carriage,
. wheels on said carriage operable by said master set, but normally out oflengagement therewith, a feeding mechanism for said carriage acting to bring said carriage wheels into position for cooperation with said master set, and shifting or tilting means for said carriage acting both to operate the feeding mechanism and to bring the carriage wheels into actual engagement with said master set of members.
21. In a computing machine, the combination with a series of actuating racks, of a master set of wheels driven thereby in one direction, a plurality of sets of dial Wheels, said dial sets adjustable in one direction to bring any selected set of dial wheels to said master set, and also movable in another direction to bring the selected set of dial wheels into mesh with said master set to be driven thereby, and carry-over devices associated with said master set of Wheels and operating the dial wheels through said master set.
22. The combination with a plurality of sets of computing wheels, of a computing mechanism for determining the extent of rotation of said computing wheels, actuating mechanism for said sets, means for effecting a relative movement between said sets and said actuating mechanism to bring about individual juxtaposition between each of said sets and said actuating mechanism, shifting means for affording relative to-andfrom movement between each set and said actuating mechanism, to bring about an actual cooperation, so that said actuating mechanism can rotate the computing wheels of the set in juxtaposition thereto, and means to enable one of said relative movements to control the other of said relative movements.
23. The combination with sets of computing wheels, of actuating mech anism for said sets, a general operator for said actuating mechanism, means for effecting a relative movement between said sets and said actuating mechanism, to bring about individual juxtaposition between each of said sets and said actruiting mechanism, shitting means for affording relative to-andfrom movement between each set and said actuating mechanism, to bring about an actual cooperation, so that said actuating mechanism can rotate the computing wheels of the set in juxtaposition thereto, means to enable onrrof said relative movements to control the other of said relative movements,
and controlling means actuated from said a plurality of general operator for governing both of said relative movements.
:24. The combination with a set of computing wheels, of a traveling carriage for said set, a rail and roller support for said carriage, and actuating mechanism for said set, said carriage being travel-sable along said rail to bring said set into the sphere of pperation of said actuating mechanism, and also being pivotal about said rail to bring said set into actual cooperation with said actuating mechanism.
25. In a combined typewritirg and computing machine, the combination with numeral keys, of a series of computing heads for computing in various columns, a single set of devices in which numbers are temporarily set up before being carried into said heads, a general operator for actuating said devices to carry the set up numbers into a head, and means operated by said general operator for bringing thenext head to effective position with reference to said devices when the number has been completely carried into one head.
26. In a combined typewriting and computing machine, the combination with numeral keys, of a series of computing heads for computing in various columns, each computinghead including a series of computing wheels, a single set of devices in which numbers are temporarily set up before being carried into said heads, a general operator for actuating said devices to carry the set up numbers into a head, means operated by said general operator for bringing the next head to eiiective position with reference to said devices when the number has been completely carried into one head, actuating devices driven by the first-nan1cd devices and arranged in turn to drive said. computing wheels to an extent determined by the numbers set up, and carry-over de vices effective on said head through said actuating devices.
27. In a combined typewriting and computing machine, the combination with numeral keys, of a computing carriage con1- prising a series of computing heads, a single mast 1' head computing heads, each of said heads comprising a set of computin wheels, lo kin means normally holding t e wheels locked in each head, a' general operator for carrying numbers through said master head into the computing head which is effective at the moment, means moved by said general operator for first freeing said effective computing head from itsloclring means and then bringing its Wheels into mesh with the nmster head, and carry-over devices effective on the said computing head through the master head,
28; In a combined typewriting and co for actuating any one of said j master head for eetue'eing any one of eeid.
computing heads, eeeh of said hees cemjprising a set ef eompueing wheels leaking means normally holding the WhGGiS leaked in each head, a general operate]: fer carryiieg numbers threugh said master need inee the eemputing head. which is efieetive at the m0n1eiit,'-n1eene moved. by said general 0; eretoz" for first freeing said efi'ective com" puting head from its locking means and ehen bringing its Wheels into mesh with the master heeci, eai'ryevei' devices effective en the said computing head through the master heed, and means epereteci by said general epereter w bring the next heed inte efi'ee tive position at the end (if eeeh eperaeion.
29. In e eempueing inwii iiie the combine Lion with a die} Wheel, of en actuating Wheel,
eherei eig said dial Wheel having carry-over mechanism eolinprising e driving whee ef festive en the actuating Wheel, normeiiy i1ieffective means by which said driving Wheei wfii'o'n with 21 die} Wheel, of en actuating Wil therezfer with Which it is normally ee'i', mesh, said dial Wheel hevinge carry-eve? teeth, carryover mechanism comprising driving Wheel efl'eetive 0n the eeue'z' Wheel normally inefifeezive meens W1: we said driving Wheei may be driven, and
Wheel normally in ineffective pesiisiee but effective when the actuating Wheel is efee 3 eive on the dial Wheel, and constantly in mesh with said driving wheel and edep eel "be moved by said carr ever tooth to move the driving wheel to effective pesieion where Will be driven.
HANS HAJEQCQL Vfitnesses FRANK A. 000K, VJ. M. BYORKMAN.
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US2436055A (en) * 1948-02-17 Combined typewriting and com

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* Cited by examiner, † Cited by third party
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US2436055A (en) * 1948-02-17 Combined typewriting and com

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