US1281783A - Combined type-writing and computing machine. - Google Patents

Description

2 SHEETS-SHEET I.

A. A. JOHNSON.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED FEB. 9. |915.

Patented Oct. 15, 1918.

INVENTOR:

ATTOF( Y.

.WWE-5 1.4M 7M/mi2.

v.. mamumo, msnmmm n c A. A. JOHNSON.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED FEB. s. 1915.

1,281,783. Patented 00u15, 1918.:

l 2 SHEETS-SHEET 2.

WITN ESSES= UNTTF STATES PATENT OFFICE.

ARTI-EUR A. JOHNSON, OF NE'W YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, T0 UNDERV/OOD COMPUTING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORA- TION GF NEW YORK.

COMBINED TYPE-WRITING AND COMPUTING MACHINE.

Application filed February 9, 1915.

To all 207mm t may concern.'

Be it known that I, ARTHUR A. JOHNSON, a citizen of the United States, residing in borough of Bronx, in the county of Bronx, city and State of New York, have invented certain new and useful Improvements in Combined Type-Vriting and Computing Machines, of which the following is a specification.

My invention relates to computing machines adapted to compute numbers running to either wide or narrow columns.

One object of the invention is to provide a machine in which it is possible to use the numeral keys for writing non-computed numbers adjacent the computing column and in which it is also possible to add in two columns so close together that they would over-lap into each other if added on a standard totalizer.

My invention is herein shown as applied to an Underwood-Hanson combined typewriting and computing machine in which the numeral keys of the typewriter are caused to set up digits representing a number as the typewriter carriage travels along and in which said numbers, after having been set up, are later carried into a set of computing wheels. Said machine usually includes totalizer having nine computing Ywheels, and also has so-called comma locks. The specific machine herein illustrated is such a machine which is used for adding in dollars and cents, wherein there is a commalock adapted to lock the mechanism between dollars and cents, and also between hundreds of dollars and thousands of dollars.

Another object of my invention is to provide means whereby when the size of the totalizer on which the numeral keys are eective, is reduced, that any comma-lock may be silenced at the same time if it is normally eective between computing wheels of which the connections to the numeral keys have been silencedfor the time being.

In the machine as herein illustrated, the usual Hanson carry-over mechanism is employed withthe result that said carry-over Specification of Letters Patent.

Patented Oct. 15, 1918.

Serial No. 6,984.

mechanism will enable the whole array of computing wheels to be used for accumulating the ones carried over into higher wheels in the usual process of addition, if the added column is long enough to need such eXtra number of computing wheels.

My invention is herein disclosed as an iniprovement on the co-pending application of Harry H. Vickers, No. 6,434 filed February e, i915.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure l is a sectional side view of an Underwood-Hanson combined typewriting and computing machine showing so much of the machine as is convenient for illustrating my invention.

Fig. 2 is a diagrammatic side view showing the connections whereby the numeral Ikeys set up numbers.

Fig. 3 is a perspective view of a part of the denomination-selecting mechanism of such a machine showing my invention as applied thereto.

Fig. 4 is a plan view of part of Fig. 3.

Fig. 5 is a side view of Fig. 3.

Fig. 6 is a perspective view of a cam plate seen in Fig. 3.

Fig. 7 is a perspective view of a guide cooperating with the cam plate of Fig. 6.

Fig. 8 is a perspective view of a second guide plate.

Fig. 9 is a rear View of part of Fig. 3.

Fig. l0 is a diagrammatic view showing the relation of numeral wheels, carry-over mechanism, jacks and denomination selecting tappets. i

Fig. l1 is a view of part of the key-locking mechanism showing the comma-locking dog.

In thev usual Underwood-Hanson combined typewriting and computing machine, the alphabet keys l and numeral keys 2 are mounted on the front end of key levers 3 and are adapted to swing bell cranks or sublevers l when depressed forwardly, so as to swing typo-bars 5 upwardly and rearwardly to cause types 6 therein to print against the front side of a platen 7. Said platen forms part of the usual Underwood typewriter carriage 8, and said carriage is normally tensioned to be drawn in letter-feeding direction by a spring barrel, not shown, and is controlled in said letter-feeding, by means of an escapement wheel 9, connected to a pinion 10, said pinion meshing with a rack bar 11, forming part of the typewriter carriage. To control the escapement wheel 9, the machine includes the usual dogs 12 and 13, adapted to alternately engage said wheel, for this purpose being vibrated by a universal member 14, said member being operated by heels 15 on the type-bars 5, as said bars approach the platen.

When the numeral keys are depressed to print numbers in an adding column, said keys at the same time, set up digit pins 16 on denomination me-mbers or bars 17, there being a denomination member 17 for every decimal space in the adding column, there being a separate digit pin 16 on each denomination member 17, for each digit or numeral key 2.

As the typewriter carriage travels along through the adding column, it raises up the denomination members 17, one after another from their normal position seen in Fig. 1 to the position seen in Fig. 2, so that any bar or member 16 which is thus raised, bringsits pins 16 within range of pin-set` ting bars 18, there being one pin-setting bar 18 for each numeral key 2, and each bar cooperating with the corresponding digit pins on every one of the denomination members 17 When a denomination member 17 is raised to the position seen in Fig. 2, any numeral key 2 which is depressed, will swing down its pin-setting bar 18 by connections to be hereinafter described, and set its digit pin 16 on the bar 17 which is thus raised at the moment. Wien the numeral key 2 rises from such depression, it feeds along the typewriter carriage one letter-space, thus tion of setting a pin will be repeated, if a numeral key is depressed in that column to print on the platen 7. After a pin 16 has been depressed, or set on each of several denomination bars 17, the numbers represented thereby are carried by the usual means, into denomination or computing wheels 19, at the front ends of the machine, by the connections which will be described later.

The connections by which the typewriter carriage thus raises the denomination mem ber 17, include the usual tappet 20 on said carriage, which is settable along the rack bar 21, and said tappet, as the typewriter carriage travels along, will in the adding zone, raise one after another, denomination jacks 22, with the result that the raised jack, as diagrammatically shown in Fig. 2, will elevate its denomination member 17, there being one jack 22 for each denomination member. Y

To bring about this result, the jacks 22 are pivoted intermediate their ends on a pivot or Cross-rod 23, extending across the casing 24, which is mounted on the usual bracket V25 at the rear side of the typewriter frame. Each jack 22 when swung up at its forward end, rocks around its pivot 23, with the result that the rear end of said jack presses down on a wire or rod 26, of which there is one for each jack, and one for each denomination member 17. When any wire 26 is thus depressed, it rocks its lever 27 so that said lever is effective on the usual transposition device 28, and raises its denomination member 17.

After the typewriter carriage passes out of the adding zone, the tappet 20 is clear of the acks 22, and therefore the numeral keys are, in effect, disconnected from the computing wheels 19. Then a number has been set up in the manner above described, in the adding Zone, the numbers may be carried into the computing wheels 19 by actuating the usual general operator which includes a cross-bar 29, so that said cross-bar coming forward, strikes the lower portion of the depressed pins 16, and drives the denomination members or computation bars 17 each to an extent dependent on the pin 16 which has been depressed thereon, and therefore turns each computing wheel 19 to an extentV dependent on the pin 16 depressed on its com-V putation member 17. To cause the computing wheels 19 to thus turn, the computation members 17 include at their forward ends racks 30 which mesh with pinions 31 connected to the computing wheels 19, said pinions being provided with the usual pawl and ratchet connection so that said wheels are not turned on the return stroke of the general operator, when the cross-bar 29 carries the computation members 17 back to their normal positions. This carrying-back of the computation members is effected by lugs 32 on the computation members 17 At the very end of the return stroke of the general operator, the usual pin-restoring alate 33 is momentarily raised to restore all the pins 16 to their usual ineffective position, as seen in Fig. 1.

The UnderwoodHanson machine, also usually` includes a so-called comma lock which is adapted to prevent the depression of any numeral key in a letter-space where a period or comma should be written but a digit shouldL not be written. For this purpose, the letter-spaces at which commas or periods ought to be written are provided with jacks 22a, just like the jacks 22V which select the denomination members 17, but said jacks 22a are not connected to any denomination member. All the jacks 22n 22a, however, depress identical rods 26 but the rods 26 which are to operate the comma lock, rest in the rear ends of bell crank levers 34, instead of being connected to the transposition device 28, and these bell crank levers each are pivoted to a cross bar 34aM at the lrear end of a forwardly extending link 35, which link is connected to operate a comma-locking dog 36.

This comma lock in the Underwood-Hanson machine is usually built as part of a device for preventing the simultaneous depression of two numeral keys. The details of this structure, are set forth in the patent of Frederick A. Hart, No. 1,188,933 patented June 27, 1916, and alsorin the British Patent No. 3390 of 1912. Said mechanism comprises a row of laterally-swinging dogs 37, and sto s adjacent the opposite ends of the row o dogs,` arranged in the manner indicated in said Patent 1,188,933 and said British Patent No. 3390 of 1912, to provide a small amount of lost motion throughout the whole row of dogs.

This locking device for preventing simultaneous operation of the keys is also cooperating with members connected to the numeral keys by which the setting of the pins 16 is accomplished. To set up said pins, each numeral key is provided with a pendant 38, which as the numeral key descends, is adapted to strike a rock arm 39, fast on a rock shaft 40, said shaft also carrying a rock arm 41, forming part of the pin-setting linkage, of which the pin-setting bar 18 also forms a part, as disclosed in said British patent and said Hart Patent 1,188,933. The linkage includes bell cranks which are adapted to swing their pin-sett ting ba-r 18 downwardly whenever their shaft 40 is rocked by its numeral key, thus providing means for depressing or setting the pins on the computation bars 17. For the purpose of preventing the simultaneous depression of two numeral keys, each pendant 38 is provided with a lug 42, which Cooperates with the above-described swinging dogs 37, with the result that when any lug 42 is carried down between any pair of the dogs 37, said lug takes up all the lost motion in the whole array of dogs, and this makes it impossible to depress any numeral key until the numeral key already depressed has risen to its normal position.

F or the purpose of making a comma-lock, this array of dogs 37 has its lost motion also entirely taken up whe-never the commalocking dog 36 is raised between two of the swinging dogs 37. The dog 36 is thus raised whenever a comma-lock operating wire 26 is depressed by its `jack 22a. From this it because no pendant lug 42 can descend be;

tween any of the dogs 37.

In order to provide means whereby I can reduce the number of computing wheels on which the numeral keys will be effective to add numbers, I provide means whereby certain of the rods or wires 26 can be moved to ineffective position clear of their jacks 22, with the result that the jacks corresponding to the rods thus made ineffective, will be ineffective on the computation members 17, and therefore said computation members cannot be utilized for setting up their digit pins. It follows from this, that the numeral keys are made ineffective to compute on the numeral wheels corresponding to the jacks whose connections to said computation members 17 are thus silenced, this being so because no numeral key can set up a digit pin on the computation member corresponding to any of the computing wheels if said member cannot be lifted by the tappet 20.

To permit this to be done, the rods 26 at their upper ends, are passed through elongated guide slots 43 in the usual plate 44, fastened to the lower and rear side of the usual casing 24. These guide slots are of such size and shape that the rods are held against sidewise movement, but can move baclm'ardly-7 and forwardly enough so that the rods, unless held forward, will fall back clear of the rear ends of the jacks Vhen it is desired to utilize all the computing wheels 19 forming the normal totalizer, the rods 26 may be all held in their forward effectiveposition by means of a guide plate 45 slidable on the bottom of the usual plate 44, (which forms part of the casing 24) and having a front straight edge 46, which when said guide plate 45 is drawn forward, will hold the rods 26 against the front edges of the slots 43. This guide plate 45 is provided with guide slots 47, through which headed screws pass into the usual plate 44, to hold the guide .plate 45 in position, said slots guides for the plate 45.

In order to shift the guide plate 45 from effective to ineffective position, a handle 48 may be drawn forward, said handle being /pivoted at 49 on the brace 50 extending from the casing 24, so that the lower end of said handle forming the lever 51, will push the plate 45 rearwardly, it being enabled to do this by means of a tongue 52 extending forward from said plate 45, and having an opening 53 therein, which is engaged bythe lower end of the lever 51. The lever 51 may assist in guiding the plate 45, and for this purpose works in a narrow slot 54, in the plate 44.

47 formingV llO .gis

In order that the rods 26 when moved ,forward by the guide plate 45, may engage the underside of the jacks 22, said jacks are provided at their rear ends with upwardly extending cam extensions 55, under which extensions the rods 26 are adapted to ride, when moved forward.

The handle 48 is adapted to be detained in either its front or its rear position by means of a -detent arm 56, attached to the brace 50, and comprising notches 57, and 58, which serve as detents coperating with the handle 48, saidfhandle 48 being sufficiently springy to be sprung by the finger of the operative out of either of said notches, when it is desired to shift the handle 48.

Itis frequently desirable to silence the connections between the typewriter carriage and certain of the computation members 17, and for this purpose, there is provided an auxiliary guide plate 59, which may hold vall the rods 26 in their eective `positions in which they are under the rear ends of jacks 22, but which may be shifted laterally along the machine, so that it will hold only a deiinitely selected number of said rods in their eective position. VIn Fig. 9, said auxiliary guide plate 59 is shown as effective to hold eight of the rods 26 in their effective position under the jacks 22, while the three lefthand Vrods seen in said figure are clear of the auxiliary guide plate 59, V and therefore Vhave fallen rearwardly to a posi-v tion clear of their jacks 22. To permit the auxiliary guide plate 59 to be thus adjust ed, the plate is provided with a slot 60, which coperates with headed guide screws 6l, fast on the plate 44, the heads of said screws cooperating with ledges formed inside the slot 60. Whenever said auxiliary guide plate 59 is adjusted to any position, such, as for example, that shown in Fig. 9, it is detained in such position by means of a spring detent 62 formed as a flat spring fast on the side of the slide 59, said spring having a projecting head to coperate with notches 63 onthe rear side of the usual guide plate 44. These notches are shown numbered to correspond to the number of numeral wheels in the totalizer which remain effective, the detent acting as a pointer on the scale which these notches thus form.

. In the form illustrated herein, the slide 5.9 is slidableto a point on which onlyV four of the computing Ywheels are connected,so that numbers can be carried into them from the numeral keys. W'hen four'wheels can thus have numbers computed in them, there are :five rods 26 on which the dogs- 22 are effective, there being five rods thus effective forV the reason that the third rod, counting from the right-hand as viewed in Figs. 3 and 4,.

stands at the point where a period is to be written between dollars and cents. f.

It will be noted that the guide plate 59 i adapted to make ineifective not only the rods 26 controlling the fth and sixth numeral wheels, but it is also adapted to make the rod 26 between said fifth and sixth wheels ineffective, this rod being the one which is the comma-lock between hundreds and thousands of dollars. vThus it will be seen that the slide 59 not only determines what computing wheels shall be directly effective in the totalizer, but it also determines whether the comma-lock controlled by the rod 26, between the fifth and sixth numeral wheels, shall be eective. lt will be observed that no such comma-lock is provided between the two highest computing wheels, this being so to avoid complexity of structure, and such a comma-lock is unnecessary because it is found in experience that such a comma-lock is practically never of service in a commercial machine. Y A

lt will be observed that the slide 59, for mechanical convenience, is made to fit over just the length of the usual guide plate 44, and has its ends cut-oit square to conform to the shape of. said `guide plate. it might happen therefore, that an operative after having used a totalizer comprising only five wheels, would startto use atotalizer comprising six or seven wheels, and would attempt to shift the auxiliary lguide 59, to bring the rods for the additional wheels to edective position, but wouldV indfV such shift-ing impossible because the'flat Yend of Vsaid slide 59 might abut up Vsquare against the rod 26, corresponding to the fifth wheel. ln order to prevent a careless operator from damaging the machine by attempting to force Jdie guide 59 past such a rod, l have provided an auxiliary cam guide 64, provided with a handle 6,5, so that the'operative, in attempting to shift the guide 59, will naturally seize the handle 65. The cam slideV 64 is slidably mounted on the auxiliary slide or guide plate 59, and for this purpose, is provided with two slots 66 and 67, each of which cooperates with one of two screws 68 on theslide` 59, thus permitting the cani slide 64 to have a considerable though limited motion on the auxiliary guide' If the operative attempts to push the cam slide 64 to the left, as seen in Fig. 4, the cam Vsurface forming the left-hand of said cam slide, will cam the rods 26 one'v after another toward their effective position. as indicated by arrows in said Fig. 4. At the same time the screws 68 will be pickedrup by the ends of the slots 66 and 67 and carry the plate 59 'along to the desired position shown by theindicator62. Vhen the required number ofrods 26- have been thus cammed to effective position, `they willbe held in such position bythe plate 59. Then the operative may release the handle'65,

whereupon a spring 70, anchored Yin Vthe auxiliary guide plate 59, will draw the cam guide 64 back to the position in which it normally stands on the auxiliary guide 59, shown in Fig. 9.

It will be seen from the above description, that l have in no way altered the usual Hanson carry-over mechanism, such as is shown in the Hanson Patent 816,319, with the result that the full totalizer with all its wheels may be used for registering numbers, if the numbers in carrying over from wheel to wheel require a totalizer of that length. Such a totalizer normally contains for commercial work, nine wheels. If, however, it is desired to add numbers of say, four figures, each including a. decimal point,'in two adjacent columns (such as the cross-adding shown in Fig. 10) said adding can be done by adjusting the auxiliary guide 59 so that the index detent spring- 62 stands at the number 4 on the scale provided on the guide plate 44. These numbers of four digits each, can then be cross-added in the same totalizer by providing two tappets 20 as shown in Fig. 10. These tappets are effective to cross-add in the manner set forth in the patent to Stickney 1,177,149.

Further, if it is desired to have two footing totalizers foot said columns, as by pro-v viding two different tappets 20working in different planes, (shown in the patent of Frederick A. Hart, 1,188,933) said footing totalizers will each foot said columns correctly, and the comma-lock which might prevent the depression of the desired numeral keys in writing one column, will be disabled. Said comma-lock is therefore effective only within the limitations of range of computing wheels which are actually being used for computation purposes. Nevertheless each totalizer for carrying-over, may utilize all its computing wheels.

Again, if it be desired to write two such columns separated by only two or three let ter spaces, and it is desired to write noncomputed numerals in said letter spaces, (as is sometimes convenient in numbering items of addition) the non-computed numerals can be written without any interference from the comma-lock or with the added numbers themselves.

To illustrate the relationship of the computing wheels, carry-over mechanism, jacks and tappets, these are shown diagrammatically in plan view in Fig. 10. The operation of this carry-over mechanism is fully set forth in the patent to Hanson 816,319, dated March 27, 1906, wherein the computing wheels 19, set the carry-over wheels 71 which are later turned scm'atz'm by the driving shaft 72 on the return stroke of the general operator. i

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

Having thus described my invention, I claim:

1. ln a computing machine, the combination with denomination selectors adapted to be set at various distances from each other, and a series ofjacks on which said selectors are effective, said selectors arranged to be brought successively into operative relation to the series of jacks, of denominational wheels under the control of said jacks, and means for silencing said control of said jacks Over a number of wheels which can be varied at will to conform to the setting of the selectors, while the other wheels remain under the control of the jacks.

2. ln a computing machine, the combination with denomination selectors adapted to be set at various distances from each other, and a series of denominational wheels, numeral keys, connections whereby each selector serz'ctm connects said wheels to said keys, said selectors arranged to be brought successively into operative relation to the series of wheels, means for silencing certain of said connections while the others remain operative, and means for varying the number of connections so silenced to conform to the setting of the selectors.

3. In a combined typewriting and computing machine, the combination with an array of computing wheels, and a denomination selector therefor, of a traveling typewriter carriage, printing numeral keys, means whereby said keys are locked at certain spaces in the travel of said carriage, connections whereby said keys may control said wheels, and a sinOle device operable for silencing said key-lock and said connections over part of said wheels.

4. In a combined typewriting and computing machine, the combination with an array of computing wheels, and a denomination selector therefor, of a traif'eling typewriter carriage, printing numerals keys, means whereby said keys are locked at certain spaces in the travel of said carriage, connections whereby said keys may control said wheels, means for silencing said keylock and said connections over part of said wheels, carry-over devices whereby said wheels form a totaliZer, and means whereby said carry-over devices are effective irrespective of said silenced wheels.

5. 1n a combined typewriting and computing machine, the combination with an array of computing wheels, and a denomination selector therefor, of a traveling car riage, printing numeral keys, connections whereby said keys may control said wheels, connections whereby said selector may lock said keys against operation at predetermined spaces in said carriage, and means independent of said selector for silencing said locking means..

6. In a combined typewriting and computing machine, the combination with an arrayV of computing Wheels and a denomination selector therefor, of a traveling carriage, printing numeral keys, connect-ions whereby said keys may control said Wheels, connections whereby said selector may lock said'keys against operation at predetermined spaces in said carriage, and a single device operable for silencing said locking means and for silencing a variable number of said key connections to said wheels.

7. The combination with a denomination selector, and a series of jacks operated thereby, of denomination members on Which said jacks are effective to operate a predetermined number of said members, means settable to vary said number, and a lingerpiece shiftable to make all said membersV effective irrespective of the setting of said settable means.

S. The combination with a denomination selector, and a series of' jacks operated thereby, of denomination rods on Which said jacks are effective, a guide for said rods normally holding them in effective position, means for moving said guide to a position Where it will permit certain of said rods to move to ineffective position, and an auxiliary guide adapted to determine the number of rods movable to ineffective position.

9. The combination with aV series of rods and jacks, of a guide adapted to holdall and jacks, of a guide.' adapted to hold` allY said rods in position Where said jacks will be effective on them, a finger-piece for moving said lguide to ineective position, an,

auxiliary guide for holding certain of said rods still in Vtheir effective position, and a slidable cam plate adapted to restore said rods to their effective position.

V11. The combination With a series of rods and jacks, of a guide adapted to hold all said rods in position Where' said jacks Will be eifective on them, afinger-piece for moving said guide toineffective position, an auxiliary guide for holding certain of said rods still in their eifective position, a slidable cam plate adapted to restore said rods to their effective position, and a spring adapted to hold said cam plate in position Where it Will be normally ineffective on said rods.

l2. The combination With a series of rods and jacks, of a guide adapted to hold all said rods in position Where said jacks will be effective on them, a finger-piece formoving said guide to ineifectiveposition, an auxiliary guide for holding` certain of said rods still in their effective position, and a scale for indicating the number of rods effective.

13. The combination with a series of rods and jacks, of a guide adapted to hold all said rods in position Where said jacks Will be effective ony them, a linger-piece for moving said guide to ineective position, an auxiliary guide for holding certain of said rods still in their effective position, a scale for indicating the number of rods effective, and a slidable cam plate adapted to restore said rods to their effective position.

14. The combination With a series of rods and jacks, of a guide adapted to hold all said rods in position Where said jacks Will be effective on them, a finger-piece for moving said guide to ineffective position, an auxiliary guide for holding` certain of said rods in their effective position, a slidable cam plate adapted to restore said rods to their eective position, a spring adapted to hold said cam plate in position Where it Will be normally ineffective on said rods, and a scale for indicating the number of rods effective.

l5. In a combined typewriting and computing machine, the combination With numeral keys and computing Wheels, Which form a totalizer, of means whereby all said yvheels can be used for cross-adding in adjacent columns, Where each column has the Width of said Wheels, and means for variably cutting doWn the number of Wheels in said totalizer on Which said keys are effective for permitting cross-adding of adjacent columns having a less numberY of letter-spaces than the number of Wheels in said totalizer.

Y16. In a combined typewriting and computing machine, the combination with numeral keys and computing Wheels, Which form a totalizer, of means whereby all said Wheels can be used forcross-adding in adjacent columns, Where each column has the Width of said Wheels, means for variably cutting down the number of Wheels in said totalizer on Which said keys are effective for permitting cross-adding of adjacent columns having a less number of letter-spaces than the number of Wheels in said totalizer, and a scale for indicating the number of Wheels in said totalizer on Whichr the numeral keys are effective.

17. In a combined typewriting andV computing machine, the combination With numeral keys and computing Wheels, which form a totalizer, of means whereby all said Wheels can be used for cross-adding in adjacent columns, Where each column has the Width of said Wheels, means Jfor variably cutting doWn the number of Wheels in said totalizer on which said keys are effective for permitting cross-adding of adjacent columns having a less number of letter-spaces than the number of Wheels in said totalizer, a comma-lock cooperating with said machine and totalizer preventing the operation of the numeral keys at improper points, and means for silencing said comma-lock when the computing wheels are silenced on both sides of said lock.

18. In a combined typewriting and computing machine, the combination with numeral keys and computing wheels, which form a totalizer, of means whereby all said wheels can be used for cross-adding in adjacent columns, where each column has the width of said Wheels, means for variably cutting down the number of wheels in said totalizer on which said keys are effective for permitting cross-adding of adjacent columns having a less number of letter-spaces than the number of wheels in said totalizer, and carry-over devices effective on the Whole array of computing wheels whether any are silenced or not.

19. In a combined typewriting and comput-ing machine, the combination with numeral keys and computing wheels, which 'form a totalizer, of means whereby all said wheels can be used for cross-adding in adjacent columns, where each column has letter-spaces covering the number of said wheels, means for variably cutting down the number of wheels in said totalizer on which said keys are eiective for permitting crossadding of adjacent columns having a less number of letter-spaces than t-he number of wheels in said totalizer, a scale for indicating the number of wheels in said totalizer on which the numeral keys are effective, and carry-over devices effective on the whole array of computing wheels whether any are silenced or not.

20. In ar combined typewriting and computing machine, the combina-tion with numeral keys and computing' wheels, which form a totalizer, of means whereby all said wheels can be used for cross-adding in adjacent columns, where each column has the width of said wheels, means for variably cutting down the number of wheels in said totalizer on which said keys are effective for permitting` cross-adding of adjacent columns having a less number of letter-spaces than the number of wheels in said totalizer, a comma-lock cooperating with said ma.- chine and totalizer preventing the operation or" the numeral keys at improper points, means for silencing said comma-lock when the computing wheels are silenced on both sides or' said lock, and carry-over devices effective on the whole array of computing wheels whether any are silenced or not.

21. In a combined typewriting and computing machine, the combination with a carriage and a totalizer comprising a series of wheels, of denomination selectors connected to be operable with said carriage for selecting said wheels, and brought one at a time, during the travel of the carriage, into operative relation to the series of wheels, means operable at will to make said selectors ineffective on certain of said wheels of the totalizer, and thereb)v reduce the range of travel of the carriage in which a selector is operative, so as to permit a closer spacing of the typewritten columns of numbers, and means to vary at will the number of wheels on which the selectors are'inei'ffective.

22. ln a combined typewriting and computing machine, the combination with a carriage and a totalizer comprising a series of wheels, of denomination selectors connected to be operable with said carriage for select-v ing said wheels, and brought one at a time, during the travel ot the carriage, into operative relation to the series of wheels, means operable at will to make said selectors ineective on certain of said wheels of the totalizer, and thereby reduce the range of travel orn the carriage in which a selector is operative, so as to permit a closer spacing ot' the typewritten columns of numbers, means to vary at will the number of wheels on which the selectors are ineliective, carry over devices for said wheels, and means whereby said carryeover devices are always effective on all said wheels throughout the totalizer.

23. In a combined typewriting and computing machine, the combination with a carriage and a totalizer comprising a series of wheels, of denomination-selecting tappets operable concomitantly with the carriage for selecting said wheels, jacks operated bythe tappets, one jack for each wheel, said tappets arranged to be brought successively into position for operating the jacks, and means operable at will for rendering a variable number of said jacks ineffective to control the wheels, said tappets relatively adjustable to positions corresponding to the number of effective jacks.

24. In a combined typewriting and computing machine, the combination with a carriage, of a totalizer comprising a series of computing wheels, denominationselecting tappets on the carriage, a row of jacks in the path of said tappets and arranged to be operated scrz'atz'm by each of the tappets, means whereby each jack is operative to control a computing wheel, and means to silence a variable number of jacks at will, and thereby variably control the number of effective jacks, said tappets being relatively adjustable, so that a tappet may be timed to be brought into operation when a preceding tappet has concluded its operation on the effective jacks.

25.' In a computing machine, the combination with a carriage, of a series of computing wheels, denomination selectors arranged to move with the carriage, means operable by each selector to control said computing wheels seriatz'm during the travel of the carriage, said selectors arranged to be brought into operation in succession, so that the seand thereby shorten the distance between ries of computing' wheels is beyond the conthe selectors required to prevent a Concomil0 trol of one selector when it is brought into tant operation of Computing Wheels by a pluthe control of another selector7 salid selectors rality of selectors.

adjustable to Vary the point, during the ARTHUR A. JOHNSON. travel of the carriage, at Which they are Witnesses: brought into operation, and means to silence W. O. WESTPHAL,

a variable number of the computing Wheels DELos G. HAYNES.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, .'D. G. Y

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