US1065367A - Adding-machine. - Google Patents

Description

O. L. INGRAM. ADDING MAGHINE.

APPLICATION FILED EEB. 25, 1905.

Patented June 24, 1913.

a SHEETS-SHEET 1.

0. L. INGRAM. ADDING MACHINE. APPLICATION rum) IEB.26,'1905.

Patented June 24, 1913.

3 BHEETSSHEET 2.

0. L. INGRAM.

ADDING MACHINE.

APPLICATION FILED FEB. 25, 1905. 1,065,367, Patented June 24,1913.

3 SHEETS-SHEET 3.

' nest avanasL-s COPY UNITED STATES PATENT OFFIQ.

OSCAR L. INGRAM, 0F WALLA WALLA, WASHINGTON, ASSIGNOB T0 GERTRU'DE INGRAM, 0F WALLA WALLA COUNTY, WASHINGTON.

ADDING-MACHINE.

Specification of Letters Patent.

Patented June 2st, 11913.

Application filed February 25, 1905. Serial No. 247,371.

To all whom, it may concern:

Be it known that I, OSCAR L. INGRAM, a citizen of the United States, residing at \Valla lValla, in the county of Walla Walla and State of \Vashington, have invented certain new and useful Improvements in Adding-h'lachines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towhich it appertains to make and use the same.

My invention relates to adding machines, and is especially adapted to serve as an attachment for typewriters. I have so illustratedit in this application. In adding machines of this character it is essential to avoid complicated mechanisms and to supply simple and positive selecting operating and locking means throughout the machine. It is evident also that machines of this character must embody other important features, some of which I will mention specifically as embodied in my machine.

I deem it necessary to provide a means to prevent the rapid movement of a counterwheel from imparting by its impetus and friction a movement to an adjoining counter-wheel,'at such times as it is not desired that an adjoining counter-wheel shall be moved. In practical work"a' counter-wheel should be stopped and locked at the instant it reaches the desired position, and this result should be accomplished with as little lost motion as possible in order to insure accurac in the computing machine. It is also desirable, in fact necessary, that some provision he made for preventing the typewriter to which the adding machine is attached from operatin more rapidly at any given moment than tie adding machine is capable of acting with accuracy. To attain this end itis necessary to prevent the operation of a key-bar While the typewriter carriage is moving. It is also necessary inmachines of this'character that the operating means, the selecting means and the locking means all he in intimaterelationship with each other inordcr that the chances for mistake andthe resistance to the touch on the key-bar may be reduced to a minimum. It is also necessary that all parts of the machine be simplified and be closely related to each other in order to avoid lost motion and consequentinaccuracy and wasted energy. These and other objects complementary to those recited I attain by the mechanism which I have illustrated in the accompanying drawings,' and have particularly set forth in the appended claims.

In the drawings,--Figure l is a front elevation of a typewriter with the adding machine attached and shows the manner in .which'theselecting device is 0perated by the typewriter carriage. Fig. 52 is a side elevation of the parts shown in Fig. 1. partly broken away, and shows a connection (by means. of the pin 38) between the selecting device and the lower end of the lever 66. Fig. 3 and Fig. 4 are side elevation details of key-bars and connected parts, and show the manner in which the operating shaft 9 is turned and then locked. Fig. 5 is a front elevation detail, partly in sections, of the key operating sections and serves principally to show the elongated shaft or pinion 9. Fig. 6 is a detail illustrating one of the features shown in Fig. 5. Fig. 7 is a plan view of the adding machine with the casing removed and shows principally the manner in which the partition plates 27' lie between the counterwheels. Fi 8 is a vertical section of the adding mac inc, and serves to show the manner in which the partition plates are mounted on the rod 28. These partition plates serve also as a locking means as hereinafter explained. Fig. 8 also shows the manner in which parts of the selecting means are assembled. Fig. 9 is a detail illustrating the selecting means and a part of the operating means. Figs. 10, 11 and 12 are details of the counter-wheels, their construction, the manner in which they are assembled, and their relative positions. Fig. 1:? also serves to show the carrying mechanism hereinafter fully described. FigLltl is a dc tail of the dividing partitions between each pair of counter-wheels. Fig. 14 is a rear view of the casing containing the counterwheels and attached parts, and shows more clearly the-connection, by means of the piece 70. between the lower end of the lever 66 and Fig. 15 is a sectional the selecting device. view of two of the counter-wheels and a partition plate 27, and also the feather l7, and shows the manner in which the feather 17 passes from one counter-wheel to another; the feather 17 being integral with a tubular shaft 14. Fig. 16 is a'view of a ratchet wheel attached to shaft 9 (not attached in Fig. 16) and serves to prevent an accidental backward movement of the shaft 9.

Thus far in these specifications the various parts of the typewriter, as shown in the different figures, have not been especially mentioned, but to one familiar with such machines the parts of the typewriter shown are easily recognized without special mention.

Having briefly described the various parts of my machine, I will now'describe the complete machine asassembled and in operation, assuming that it is attached to an ordinary Remington typewriter. In order as far as possible to prevent repetition in the description of parts I will simply describe an operation of the machine through one addition, describing each part of the machine as it is called upon to act during the operation.

In Fig. 1 a front view of a Remington typewriter is shown with the adding machine attached, the adding machine being attached to the front part of the typewriter by screws or other suit able means. The lower part of the frame 6 is shaped, as shown, to carry the casing 8, which casing 8 contains the counterwheels and attached parts of the adding mecha-' nism. The upper part of the frame 6 is shaped to form the arm 63 to which is loosely attached the lever 66, which lever is actuated by the bar 57 attached to the typewriter carriage, In Fig. l the machine has registered 245801637. To make the operation a brief one we will assume that weare going to add to this the sum of 88, there being no decimals provided for in the machine as shown, and none used in the figures now under consideration, assuming, for instance, that we are adding a number that represents live stock, such as horses. In Fig.1 1 we will assume that the Written words of the line, whatever they might be, have been typed on the machine and the typewriter carriage has by this typing been moved leftward carrying. with it the bar 57 by means of the pin 58, and now the notch 61 engages the pin 68 in the top of the lever 66. It will now be readily apparent that a further leftward movement of the carriage will cause a leftward movement of the top of the bar 66, causing a rightward movement of the bottom of the bar 66, the relation between the degree of movement of the top of the bar and the bottom of the bar 66 being controlled by the location of the arm 63 and pin 67 thus accommodating the degree of movement at the bottom ,of the bar 66 to the desired muvement according to the distance from the center of one counter-wheel to the center of an adjoining counter-wheel. Inasmuch as the sum we are to add to the sum already evidenced is 88 no numeral keys will be struck when the machine assumes the position shown in Fig. 1, but the space bar or tabulator key would be operated to cause a movement of seven spaces by the typewriter carriage, thus causing as above described a leftward movement, equal to seven spaces, of the top of the bar 66. Taking into consideration for a moment Fig. 14 (which is reversed as to right and left) it will be seen at a glance that this rightward movement of the bar 66 will move the pin 38 to the right in the slot 41. Now, looking at Fig. 9 it will be seen that the pin 38 when moved to the right will carry with it the entire framework and attached parts shown in Fig. 9, special attention now being called to the feather 17 shown in Fig. 9, and also in Fig. 15. As- 'suming now that the carriage has been moved to the left the seven spaces mentioned above, it will readily be seen that the feather 17 will rest in an internal gear cut of the counter-wheel second from the right hand side, or the counter wheel representing tens, the manner in which the feather 17 passes from one counter-wheel to another through the notches or gear cuts in the partition plates 27 being clearly shown in Fig. 15. Before entering into a description of the actuating movement caused by the downward movement of the key-bar carrying the numeral 8. which we are now ready to describe in this operation, it might be well to elaborate somewhat upon the locking func- 1 tion of the plates 27. It is a well known fact in this art that there is a tendency of operators to strike a numeral key before the typewriter carriage has come to the desired position in moving from one letter space toanother, and with an adding machine attached this must beprevented. This need is well known to the art [and need not be dwelt upon at length. A- glance at Fig. 15 will show that in this machine it would be impossible to revolve the shaft 11 carrying the feather 17 while the feather 17 is moving from one counter-wheel to another, as shown in Fig. 15, because the feather 17 during such movement is sliding through a notch in the fixed partition 27. Again, during this sliding or selecting movement it will beseen that the feather 17 will be guided by a notch in 27 so as to easily enter a gear cut or internal notch in a counter-wheel 18. This short description suflice s to show the great importance of the partition plates 27, they being guiding and locking means, and serving also to prevent one counter-wheel from turning an adjining counter-wheel by friction. Now, assuming that the feather 17 has passed through a partition 27 and has gage the gear teeth of the pinion 9, cause said pinion 9 to be revolved forward the space of eight teeth, or eight-tenths of an entire revolution. It is of course understood that the rack 48 carried respectively by each key-bar, has teeth in number to correspond with the numeral carried by the typebar to which it is attached, therefore, the rack shown in Fig. 4 would be attached to the typebar carrying the numeral 8. It will readily be apparent that there is necessity for holding the rack 48 with its teeth 49 in mesh with the pinion 9 during the down ward movement of a key bar, and this is accomplished by means of the pin 54 which is attached to a downward extending and fixed bracket 53, shown more clearly in Fig. 6. Now it being clearly understood that 54 is a fixed pin it will readily be seen that as soon as the rack 48 starts downward the; tongue or outward extending flange 50 which is integral with the rack 48, will relatively pass along the surface of the pin 54 and between the pin 54 and the pinion 9, until the full downward stroke is finished, at which time the tooth 51 carried by the bar 45, will engage teeth of the pinion 9 and thus lock said pinion from further revolving, as shown clearly in Fig. 3; and at the same instant the spring 50, the lower end of which is soldered or otherwise fastened to the rack 48, will be pressing against the pin 54, having a tendency to push the pin 54 to the right (referring to the way the parts appear in Fig. 3), but as the pin 54 is fixed and cannot move, and as the rack 48 is movable on the pin 47, the tendency of the spring 50 is to kick the rack backward as clearly shown in Fig. 3, and thus throw it out of engagement with the pinion 9, and the t-ypebar may then return to its uppermost position and will of course carry the rack 48 to its uppermost position also, and then the spring 50, the upper end of which is soldered or otherwise fastened to the rack 48, acting exactly as spring 50, only in a reverse direction,causes the rack 48 to again assume the position shown in Fig. 4, ready for a repetition of the same movements. It might be well to state here that while Fig. 4 shows a rack attached to the typebar carrying the numeral 8, Fig. 2 shows a rack attached to the typebar carrying the numeral 7 as will be seen by observing Figs. 3 and 4; but this does not hinder the Figs. 3 and 4 from showing clearly the positions assumed by the rack 48 at the beginning and. end of the upward and downward movements of the rack 48. It might be well to state here that the part designated 46 in Figs. 3 and 4, is a spring, designed to absorb the shock caused by the rack 48 coming in contact with the pinion 9. It may consist of a part of the bar'45 bent to the shape shown in Figs. 3 and 4, in case said bar 45 is made of spring steel, or itmay be made of another piece and attached in any desirable manner. It being understood now that the downward movement of the keybar carrying the numeral 8 will cause the desired amount of revolving movement in the pinion 9 I will carry the explanation of the operation on logically and explain how this movement of the pinion 9 is communicated to a counter-wheel.

As will be clearly observed in Fig. 5 the elongated pinion 9 terminates in. a smaller elongated part designated 13, such part 13 carrying a. pin 15, as shown plainly in Fig. 1, which pin 15 is designed to project through the slot 16 in the hollow shaft 14, as shown in Fig. 1. The parts 14 and 13 are also shown in Fig. 9, but the slot 15 is not visible in Fig. 9. It now being understood that by means of the pin 15 and the slot 16,

the hollow shaft 14 must turn directly with the pinion 9 and its elongated extension 13,

it will be evidentithat in this instance the hollow shaft 14 will turn eight-tenths of one revolution. By reference to Fig. 1 it will be seen that the counter-wheels 18 are mounted directly on the hollow shaft 14, which hollow shaft 14 extends entirely through all of the counter-wheels 18 and surrounds the extension 13 as clearly shown in Fig. 1. This being understood, and it having been explained hereinbefore that the movements of the typewriter carriage have caused the feather 17, carried by the hollow shaft 14, to assume a position in one of the internal gear cuts of the second wheel from the right, or tens wheel, it will be understood without further explanation that the said counterwheel will in turn be moved forward eighttenths of one revolution by the downward movement of the keybar carrying numeral 8, as hereinbefore explained, thus adding to that column the value of eight. Now, inasmuch as said counter-wheel exposed a value of 3 before this operation it became necessary during the revolving movement of the counterwheel 18 now under consideration, to transfer or carry the value of one unitinto the adjoining counterwheel 18 next to the left of the counterwheel so moved forward eight spaces as above described. I will now explain how this carrying is accomplished.

As shown in Fig. 10 each of the counterwheels 18 has on its right hand side twenty gear teeth, and in the same plane on its left hand side a single pin or tooth 21, as shown in Fig. 11; and as shown in Fig. 7, the surface of the wheel carries numerals and the outward extending blades 22, the blades 22 being more plainly shown in Fig. 11. Ly-

ing in a plane between each pair of counterwheels 18, is a gear wheel 23, as shown in Fig. 12, this gear wheel being continuously in mesh with the gear teeth 20 of its leftward counter-wheel 18, and is engaged by the pin 21 carried by its rightward counterwheel 18 during only a part of the one-tenth of arevolution of the counter-wheel 18 to its right. It might be well to explain here that in Fig. 12 the pin or tooth 21 has not yet reached its farthest downward movement, but is in a position ready to engage a wheel 23 after the beginning of the next one-tenth of a revolutionbf the counter-wheel 18 to which said pin 21 is attached. Now, inasmuch as the pin 21, as shown in Fig. 12, is not in immediate communication with a tooth of the wheel 23, it must move slightly before engaging a tooth of the wheel 23, and this being the case it is obvious that onetenth of a r-evol ition of the wheel 18 carrying the pin 21 will not move the wheel 28 a full one-tenth of a revolution. and it will not, therefore, in turn move the leftward adjoining counter-wheel 18 a full one-tenth of a revolution, or a movement from one digit to another. It is intended, however, that said leftward counter-wheel 18 will be moved a sufficient part of such one-tenth of a revolution to allow the mechanism hereinafter explained to complete such one-tenth of a revolution. and I will now explain how this is accomplished, reference being had to Fig. 15. It is assumed that the pin 21, acting through the wheel 23 has moved the leftward counter-wheel 18 to the position shown in Fig. 15. By referring to Fig. 15 it will be seen how a leftward sliding movement of the feather 17 will complete the movement of the counter-wheel 18 because of the beveled or sharpened ends of the feather 17, and the beveled or sharpened leftward and rightward edges of the internal gear teeth made by the gear cuts 19. It might be well to explain in this connection that the shape of the feather 17 and the teeth made by the gear cuts 19 may be accommodated in their construction to the degree of movement in the wheel 18 necessary to be caused by the leftward movement of the feather 17. This may bev accomplished by sharpening the feather 17 all on one side to resemble a chisel edge, instead of as shown in Fig. 15, and this may also be done with the internal gear teeth of the wheels 18. However, in the machine I have constructed the wheels 18' in the carrying movement hereinbefore described are moved slightly more than one half of one tenth of a revolution, and therefore, the feather 17 is constructed as shown in Fig. 15. It might be well to explain here the function of the partition plates 27,

shown in Fig. 13. As shown clearly in Fig. 13 these partition plates 27 have internal gear cuts to correspond with the internal gear cuts of the counter-wheels 18. These plates 27 not only serve as dividing plates to keep one counter-wheel 18 from rubbing against an adjoining counter-wheel 18, but by means of the internal gear cuts 29 acting upon the feather 17, serve as a guidingv and locking means to guide the feather 17 in its sliding movement. It being readily seen that inasmuch as the plates 27 are fixed and cannot revolve, the feather 17 will not be allowed to revolve during the sliding or selecting movement from one wheel to another, and in such selecting movement will be properly guided into an internal gear cut of a counter-wheel 18.

I will now describe the function of the' blade 39, shown in Figs. 8 and 9, it being understood that this blade has a sliding movement in unison with the feather 17. It is well known in this art that there is a tendency of counter-wheels to overshoot, that is to continue to revolve after the desired amount of movement is obtained. The blade 29 is for the purpose of preventing this overthrow movement during the tens carrying movement of a counterwheel, and its operation is as follows: As before stated each counter-wheel '18 carries 10 outward extending blades '22. The blade 39 in its movements to right and left passes between the blades 22, and during the downward movement of a keybar when the writer carriage is at rest, it lies between two of the blades 22 of the counter-wheel to the left of the counter-wheel being moved by the lteybar. as before described, the same wheel to the left being the. one which will be moved by a tens-carrying movement. Now by reference to Fig. 8 it will be seen that the blade 39 will prevent. more than a certain amount of movement of the counterwheel 18 which it so engages. The relative location of the feather 1.7 and the blade 39 is such that during the leftward movement of the parts shown in F ig. 9 the blade 39 will release the teeth 22 of a counter-wheel just prior to the instant the feather 17 engages the internal gear cut of that particular counter-wheel to move it forward by the sliding movement of the feather 17, if it has been moved a portion of one-tenth of a revolution by an adjoining wheel 18 during a tens-carrying movement. In Fig. 8 will be observed a piece designated 21. This consists of a spring brake. mechanism and is designed to assist in holding and locating the counter-wheels 18. there being one for each counter-wheel. This piece 24: carries a bump or extending part designated 26. This part 26 is designed to come in contactwith the teeth 22 of a counter-wheel, and when resting between two of the teeth 22,

much as it is desirable to release these brakes during a movement of a counterwheel by a key bar I have arranged mechanism to accomplish this. I The piece 35 shown in Fig; 9 carries an extending part or cam marked 36, and when all of the parts shown in Fig. 9, which parts all have a sliding movement together, during the movement of the typewriter carriage, are

' the left hand end of the pinion 9. In Flg.

at rest and the feather 17 is in engagement with the internal gear cut of a counterwheel 18, the extending bump or cam 36 will rest under the spring brake 24 that bears on that particular wheel 18 and bear it away from saidwheel 18, thus leaving that particnla'r wheel entirely free from the resistance caused by the said brake. It might be well to add here that when the parts are in the position just described the indicator point at the end of the arm 33 (see Figs. 1 and Q) will point directly over the particular counter-wheel engaged by the feather .17 as above described.

One complete movement of a keybar and attached parts as well as the accompanying movement of a coimter-wheel and the carrying mechanism having been fully described it would be useless repetition to go through it again to describe what takes place when the 8 in the units column is written to complete the addition of the amount 88 above mentioned. But suflice it to say that as the addition is then complete the carriage isreturned to its right hand or initial position and the parts shown in Fig. .9 slide back to the position they have in Fig. l. and the machine is ready for another complete operation. If it is desired to add no further sums to the account now obtained it will then be necessary to clear the machine. that is to say bring it to such position that no sum whatever will show at the sight hole 40. In my machine I accomplish this as follows: In the hollow shaft 14 I provide a series of notches, one for each counter-wheehspaced to correspond with nawls 43 loosely mounted in a cut-away place in the side of each counter-wheel, the pawls 43 being so placed, as shown in Fig. 10, that they will bear upon the hollow shaft 14, and when the hollow Shaft 14 is in the position shown in Fig. 1 the said pawls 43 will engage the notches 42 if the hollow shaft 14 is revolved backward, that is in' a direction reverse to its movement caused by a keyb'ar action. To

accomplish this reverse revolving movement I provide a milled head 31, Fig. 1 and Fig. 9, which may be turned with the thumb and finger and thus return the counter-wheels 18 to their normal position. This is, however, a minor feature of my machine, and no particular stress is laid upon it. In manipulating the milled head 31 to cause a reverse revolving mover'nent of the hollow shaft 14, it is nece's's'z'ti'v at the time to raise with the finger the pawl 74, shown in Figs. 1 and 16,

inasmuch as this pawl acting on the ratchet wheel 12 is intended to prevent a reverse revolving movement. of the pinion 9, which pinion 9 must revolve with the hollow shaft 14. as hereinb'efore explained. The ratchet wheel 12 may be placed at either end of the elongated pinion 9. In Fig. 1 it is shown at 6 it is not on the pinion 9 at all, but I do not deem it necessary to show it connected in more than Fig. 1, in which case, the ratchet 74 is attached by a pin to the easing 7 2.

My invention may, of course, have its principles carried out by various modifications of the mechanical elements disclosed. these shown merely being an illustration of what I believe to be one of the practical forms in which the machine may be constructed;

For the purpose of returning the parts shown in Fig. 9 to their normal or leftward position after they have been moved to the right by the action of the typewriter carriage. I provide the spring 69, shown in Fig. 1, and as a further means to assure in every instance such leftward return of the selecting device I provide the overhanging projection, or shoulder, 59, shown in Fig. 1. It will be seen that this shoulder 59 will engage the pin 68 when the bar 57 moves to the right. reference being had to Fig 1.

Throughout the accompanying claims the expression partial movement is intended to mean a fractional party of a movement of a counter-wheel 18, from one digit to a next higher digit.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

'1. The combination. of a series of counterwheels with internal gear cuts, of a series of partitions, one between each pair of wheels, each partition having an internal gear cut corresponding with the gear cut of the adjoining counter-Wheels, and a selecting and operating device inoving through the gear cuts of the counter-wheels and the partitions.

2. The combination of a series of counter wheels, an operating device to operate the counter wheels, a series of partitions between thie counter wheels formed to engage the operating device, a selecting device, and a key bar to actuate the operating device and control the movements of the selecting device.

The combination with typewriter mechanisms, of a series of counter-wheels, a selecting and operating device, means to pre vent the operation of the operating device during the selecting movement, a series of retarding devices and a releasing device to release the retarding devices during the operating movement.

4. The combination wlth typewriter mechanisms. of a serles of counter wheels, a corresponding series of brakes, indicating means, a selecting and operating device,

means to prevent the operating device from operating during the selecting movement, and a brake releasing device to release a counter-wheel during the operating move ment.

5. The'combination of a series of counterwheels'and operating keybars, of connecting operating means comprising a gear shaft, a rack, a switch, and means operating in connection with the switch to put the rack into and out of the line of engagement with the gear shaft. 7

6. The combination with a series of counter-wheels, of selecting and operating means, the operating means comprising an elongated gear and a rack, and a device for throwing the rack into and out of the line of engagement with the gear.

7. The combination with a series of counter-wheels, of selecting and operating means,

the operating means comprising an elongated shaft carrying a gear, a series of racks, and mechanisms to throw the racks into and out of engagement with the gear.

8. The combination. with typewriter mechanisms, of a key-bar, a counter-wheel, an

operating shaft, means for operating the shaft, and a lock operating on the shaft, both carried directly by the key-bar, the lock working in unison with the operating means.

9v The combination with typewriter mechanisms, of key-bars, counter-wheels, an op-- crating shaft with gear teeth, a plurality of devices connected with the key-bars to operate the operating shaft and a lock to 0p erate on the shaft.

10. The combination with typewriter mechanisms, of key-bars, a computing mechmechanisms, of key-bars, counter-wheels, a

gear for operating the counterwheels, bars carried by the key-bars having teeth to engage and lock the gear, racks carried by the bars to engage and revolve the gear, and

means? means .for throwing the racks out of en gagement with the gear at the instant the gear is locked.

13. In a computing. machine comprising a series of counter-wheels alternating, with a series of partition plates between the counter-wheels. a series of retarding or locating devices, selecting and operating means, and a device for moving a retarding or locating device .away from a counter-wheel selected for operation.

14. In a computing device comprising a series of counterwheels, a key bar, selecting and operating means controlled by the key bar, mechanism for imparting to a counter wheel apre-determined fraction of the movement from one digit to another, and mechanism relatively movable from one counter wheel to another to subsequently complete such carrying movement.

15. In a combined typewriter and adding machine having a movable paper carrier, means. for carrying from one column to another comprising mechanisms which limit the movement of the wheel into which the carrying is being done to a fraction of the carrying movement, and means for positively completing the operation of carrying by the movementof the paper carrier;

16. In a combined typewriter and computing machine having a movable paper car* rier, means for carrying from one-column to another comprising a key-bar, a counterwheel, connecting operating means, and means between the counter-wheel being directly operated by a key-bar and the next succeeding wheel to carry that next succeeding wheel a partial movement forward, and means for completing the movement of that next succeeding wheel by the movement of the paper carrier.

17. The combination with a series of counter wheels and a series of gear Wheels, each counter wheel meshing with a gear wheel on one side and intermittently engaging the wheel next to it topositively revolve the counter wheel of next higher denomination a fraction of the movement from one digit to a higher digit, and means for subsequently completing the movement to the higher digit.

18. In a computing machine. a key bar, a series of counter wheels and a series of gear wheels, each counter wheel meshing with a gear wheel on one side and intermittently engagingthe next wheel to positively revolve the wheel of higher denomination only a part of the movement necessary to expose the next digit on the counter wheel, when the key bar is struck, and means to subsequently complete the movement necessary to fully expose such digit.

19. In a combined typewriter and comnuting machine comprising actuating means a series of counter wheels, a gear wheel lying in a plane between each pair of counter wheels in constant engagement with the wheel of nextl'iigher denomination and intermittently engaged by the wheel of lower denomination, and a partition plate between each pair of counter wheels having a tooth to prevent an untimely operation of a counter wheel by the actuating means.

20.111 a combined typewriter and computing machine, comprising means, two or more counter Wheels, carrying mechanism lying in a plane between each pair of counter wheels engaged intermittently by the counter wheel of lower denomination to operate the counter wheel of higher denomination during the carrying movement, and a partition plate between each pair of counter wheels having a locking piece to lock the operating means.

21. In a combined typewriter and com puting machine; the computing machine comprising a series of counter-wheels, carrying mechanism consisting substantially of a gear intermittently engaged by a counter-wheel of lower denomination and intermittently actuating a wheel of higher denomination and a lock to prevent the wheel of higher denomination from moving too far during such movement.

22. In a computing machine, a series of counter-wheels each having an internal gear cut, a reciprocable shaft bearing a feather or equivalent, which plays through the internal gear cuts and operates a selected wheel, and a device intermediate the wheels to prevent a rotary movement of the feather while passing from one wheel to another;

Ina combined typewriter and adding mach ne, a series of counter'wheels, means for-selecting and operating any of the counter wheels, means for moving the counter Wheel of succeeding denomination in carrying from one decimal division to another, a lock for that succeeding wheel to limit its movement to a fraction of the space represented by one digit, and means for subsequently completing the movement of said succeeding wheel to the full space represented by one digit.

24. In an adding machine, a series of counter-wheels each of which bears locking teeth, means carried by each wheel for operating intermittently the-wheel of the succeeding denomination, means for selecting and operating each wheel, and a locking device immediately preceding the selecting and operating means during the selecting movement, to act with the locking teeth so that a wheel cannot be moved more than the desired movement during thev carrying ope t a,

25. The combination with typewriter mechanisms, of a series of counter-wheels, a selecting and operating device, the selecting operating device being actuated during its select-ing movement by the typewriter carriage, and having a spring connection tending to return it to normal position after a selecting and operating movement.

26. The combination with typewriter mechanisms, of a computing device comprising a series of counter-wheels, carrying mechanisms, selecting mechanisms and oper ating mechanisms,consisting of "a master means and connections with the typewriter key-bars to operate the master means, and springs to absorb the shock when a key-bar acts upon the connection to move the master means.

27. The combination with a series of counter wheels having internal teeth, of an operating shaft, a slidable sleeve operatively connected with said shaft and bearing a tooth to engage the internal teeth of the counter wheels, means for revolving the shaft and thereby revolve the sleeve and the counter wheel, and means for causing a sliding movement of the sleeve.

28. The combination with typewriting and computing mechanism, of key bars, operating means comprising a gear shaftcarrying a plurality of gear teeth, a plurality of "acks, and mechanism to hold a rack and gear tooth in operative engagement with each other during the movement of a key bar in one direction and operating to hold said rack and gear tooth out of operative engagementwith each other during the movement of the key bar in another direction.

29. The combination with typewriting mechanism and computing mechanism, of numeral key bars, operating means comprising a gear shaft carrying a plurality of gear teeth, a plurality of racks, one controlled by each numeral key bar, mechanism to hold a rack and a gear tooth in operative engagement with each other during the movementof a key bar in one direction, and mechanism to hold such rack and gear tooth out of operativeengagement with each other during the movement of such key bar in another direction.

30. The combination with typew'riting and computing mechanism, of numeral key bars, operating means comprising aplurality of gear teeth and a plurality of racks, and means for holding a rack and a gear tooth in operative engagement during a part of the m oven'ient of a key bar and out of operative engagement during a part of themovement of such key bar.

31. The combination with typmvriting mechanism, of a series of counter wheels, a series of numeral key bars, a gear. a series of racks. a device to hold a rack in engagement with a gear during a part of the movement of a key bar and in disengagement with such gear during a part of the move ment of such key bar, and a lock operating to prevent overthrow of the gear.

32. The combination with typewriter mechanism, of a series of counter wheels, a series of numeral key bars, .of operative means comprising a plurality of gear teeth, a plurality of racks, and mechanism operative upon the movement of a key bar to hold a rack in a line of engagement with a gear tooth during a part of the movement of such key bar and out of a line of engagement with such gear tooth during another part of the movement of such key bar.

33. The combination with typewriting mechanism and computing mechanism, of aplurality of numeral key bars, a plurality of gear teeth, a plurality of racks cont-rolled by the numeral key bars, means operating to hold a rack and a gear tooth in a line of engagement with each other during a part of the movement of a key bar, and out of the line ofengagement during another part of the movement of the key bar, and a lock operating to prevent the rack from moving the gear tooth too far.

34. In a computing machine comprising counter wheels, key bars, a selecting device, a master means to revolve the counter wheels, mechanism operating when a counter wheel is revolved directly by the master means through its decimal carrying point, to revolve the adjoining counter wheel'of higher denomination only a fixed fraction of the movement necessary to carry, mechanism so operating that if that last mentioned counter wheel so fractionally moved, is, during such fractional movement, moving through its decimal carrying point it will in turn revolve its adjoining counter wheel o higher denomination a still less fraction of he movement necessary to carry, and mecha Q msm operating, independent of the opera- I .tion of the master means, to complete such decimal carrying movements.

35 In a computing machine comprising counter wheels, numeral key bars, a selecting device, a master means to revolve the counter wheels, a device for operating the master means, mechanism operatingpvhen a counter wheel is revolved by the master means through its decimal carrying point, to re- Qvolve the adj oiningcounter wheel of higher denomination only a fixed fraction of the movement necessary to carry, mechanism so operating that if that last mentioned counter wheel so fractionally moved, is, during such fractional movement, moving through its decimal carrying'point, it will in turn revolve its ad o1mng counter wheel of higher denomination a still less fraction of the movement necessary to carry, and so on so that when the number of counter wheels of sue-- cessive higher denomination than the counter wheel operated directly by the master means,

noeaee? in immediate position to carry during such operation, equals or exceeds the denominator of the fraction representing such fractional movements, then certain of such counter wheels will be revolved only a fraction of the movement necessary to carry, when the master means is operated and certain of such counter wheels will not be revolved at all when the master means is operated, a. device for completing the carrying movement necessary to the counter wheels so fractionally moved, and for imparting the complete carrying movement necessary to such of said counter wheels as have not been moved at all by the operation of the master means.

36. In a computing machine comprising a master means, a selecting device, operative means for actuating the master means, mechanism for operating the selecting device. counter wheels, mechanism for positioning a plurality of counter wheels, of

successive higher denomination, to carry decimally, mechanism whereby a movement of the master means will revolve some of such counter wheels a fraction of the movement necessary to carry decimally, such fractional movement so imparted to each counter wheel being less than the fractional movement imparted to its adjoining counter wheel of lower denomination, and mechanism for completing'the whole carrying movement necessary to complete the computation.

37. In a computing machine comprising a mastermeans, a selecting device, operative means for operating the master means,

mechanism for operating the selecting device. counter wheels, mechanism for positioning a plurality of counter wheels, of successive higher denomination, to carry deci mally, mechanism whereby an operation of the master means will revolve some of such counter wheels a fraction of the movement. necessary to carry decimally, thefractional movement so imparted to a counter wheel being more than the fractional movement 1 10 in'iparted to its adjoining counter wheel of higher denomination, and mechanism for completlng the whole carrying movement necessary to the computation.

38. In a computing machine comprising a master means, operative mechanism for actuating the master means, a selecting device having a selectingmovement and a return movement, mechanism for actuating the selecting device to select,'mechanism for imparting a return movement to the selecting device, counter wheels, mechanism for positioning a plurality of counter wheels to carry decimally, mechanism whereby a movementcounter wheel a fraction of the movement necessary tocarry decimally, the fractional movement so imparted to' a counter wheel of the master means will move a being less than the movement imparted to In testimony whereof I aflix my signature, its adjoining counter wheel of lower dein presence of two witnesses. nomination, and mechanism whereby the re- OSCAR L. INGRAM. turn movement of the selecting device will Witnesses:

5 operate to complete the carrying movement Jos. H. BLACKWOOD,

necessary to the computation. FREDERICK P. HINKEL.

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