US429486A - sharpe - Google Patents

Description

5 Sheets-Sheet 1.

(No Model.)

J. SHARPE. COMBINED CASH INDICATOR, REGISTER, AND CALCULATOR.

Patented June 3,1890.

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(No'ModeL) Patented June 3, 1890.

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J. SHARPE. COMBINED CASH INDICATOR; REGISTER, AND CALCULATOR. No. 429,486. Patented June 3, 1890.

(No Model.) 5 Sheets-Sheet 4.

J. SHARPE. COMBINED CASH INDICATOR, REGISTER, AND CALCULATOR.

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(No Model.) 5 Sheets$heet 5.

J. SHARPE. COMBINED CASH INDICATOR, REGISTER, AND CALCULATOR. No. 429,486. a Patented June 3. 1890.

UNITED STATES PATENT OFFICE.

JOHN SHARPE, OF TORONTO, ONTARIO, CANADA, ASSIGNOR OF ONE-HALF TO ROBERT HARRISON REID, OF SAME PLACE.

COMBINED CASH INDICATOR, REGISTER, AND CALCULATOR.

SPECIFICATION formingpart of Letters Patent No. 429,486, dated June 3, 1890.

Application filed September 9, 1889. Serial No. 323,42 (No model.)

To all whom it may concern.-

Be it known that I, JOHN SHARPE, of Toronto, Province of Ontario, and county of York, Canada, have invented a new and useful Improvement. in Computing-lvlachines; andI do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use it, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to an improvement in computing-machines adapted to be used for purposes of addition, subtraction, multiplication, and division; and it consists in the peculiar construction and combination of devices that will bemore fully set forth hereinafter, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a front elevation of my improved computer. Fig. 2 is a similar view of the same, the front side of the inclosing-ease being removed. Fig. 3 is a top plan view partly in horizontal section. Fig. 4 is a detailed perspective view'of the trip-bar. Fig. 5 is an end view of the computing machine. Fig. 6 is a vertical transverse sectional view of the same. Fig. 7 is a detailed elevation of the gears and the tens-operating keys. Fig. 8 is a detailed perspective view of the guide-bar, the ratchettumblers, and the dog. Fig. 9 is a similar view of one of the rocking-detents. Fig. 10 is a partial rear elevation of the computingmachine, the rear side of the case being removed. Fig. 11 is a detailed elevation of the gears and the keys forming part of the hundredsregistering i'nechanisi'n. Figs. 12, 13, and 1a are detailed elevations of the ratchetsleeves. Fig. 15 is a detailed perspective view of the tens-rocking detent. Fig. 16 is a detailed perspective view of one of the weight-arms.

The main shaft G of the registering-machine extends through bear-in gs in the ends of the case and is adapted to move endwise therein. A coiled extensile spring a bears against one end of the case and against a shoulder b on the shaft and serves to hold the latter normally in the position shown. In

' 9 indicate hundreds of millions.

the opposite end of the main shaft is pivoted a lever 0, having an eccentric-cam d, which, when the lever is moving outward, is adapted to bear against the end of the case and draw the main shaft endwise, for the purpose to be presently described.

Arranged on the main shaft and loosely and independently revoluble thereon are a series of disks 1 2 3 at 5 6 7 8 9, each of which is provided on its periphery with a series of numerals from O to 9, arranged at suitable regular distances apart. The numerals on the disk 1 indicate units, those on disk 2 indicate tens, those on disk 3 indicate hundreds, those on disk 4 indicate thousands, those on disk 5 indicate tens of thousands, those on disk 6 indicate hundreds of thousands, those on disk 7 indicate millions, those on disk 8 indicate tens of millions, and those on disk The number of disks may be increased at will to adapt the machine to register sums of any desired magnitude. The said disks are provided with spur-wheels 1"" 2 3 l 5 6" 7 S 9, respectively, the said spur-wheels being rigidly secured to or formed integrally with their respective disks, and the said wheels being all of the same diameter and provided with the same number of teeth.

Openings P are made in the front side of the inclosing-case, through which the numbers on the disks are presented successively as the disks are rotated. A sleeve 1 extends from one side of the wheel 1 and is secured firmly thereto. Said sleeve is loose on the main shaft, and has at its outer end a spurwheel 1, which is exactly similar to the wheel 1. A shaft T is arranged parallel with the shaft G and at a suitable distance therefrom, and has its ends rigidly secured in the end of the case. On this shaft T? are loosely mounted a series of spur-wheels efg hi 7t Zm 91-, which are all of the same diameter and have the same number of teeth. The wheel c meshes with the wheel 1 The wheel f meshes with the wheel 2. The wheel g meshes with the wheel 3. The wheel h meshes with the wheel l. The wheel i meshes with the wheel 5. The wheel meshes with the wheel (5. The wheel Z meshes with the wheel 7. I00

The wheel at meshes with the wheel 8. The wheel a meshes with the wheel 9. The wheels 9 h i 7 Z m n are provided on one side with a series of tappet-pins 0 corresponding in numher to the numerals on the disks-that is to say, there are ten of the said pins on each of the said wheels. Each spur-wheel 3 4. 5 6 7 a 8 9 is provided with a radial tappet-pin 1), (see Figs. 2 and 3,) which pins are in the paths of the pins 0, and are arranged between the numerals O and 1 on their respective disks. Pawls D engage the wheels 71 t 7.. I'm at and serve to prevent the same from turning in a reverse direction from that indicated by the arrow E in Fig. 6.

Ashaft T2 is arranged lengthwise in the case and at a suitable distance in rear of and below the shaft T. On this shaft T is loosely mounted a sleeve G which has ten ratchets, the width of which is equal to the length of the sleeve. Rigidly secured to the said sleeve is a spur-wheel 11 which engages the loose spur-wheel f on the shaft T. Thelatter wheel engages the wheel 2. Hence when rotating motion is imparted to the said sleeve the disk 2 will be turned.

Arranged at a suitable distance above the shaft F and parallel therewith is a shaft K on which are loosely mounted a pair of ratchetsleeves L M which are similar to the ratchetsleeve G The ratchet-sleeve L has a spurwheel N that meshes with the idle-wheel e on the shaft T, which idle-wheel engages the wheel 1. The ratchet-sleeve M has a spurwheel 0, that meshes with the idle-wheel g, also on shaft T which idle-wheel meshes with the wheel 3.

Loosely mounted on the shaft T is a rockingdetent T Fig. 0, which has a horizontal engaging-lip U of suitable length, and from one end of which detent T projects an arm Y A spring is attached to the shaft at a point about midway between the ends of the rocking-detent, and the free end of the spring bears against the rear side of the lip, and hence moves the same normally in one direction. A pivoted dog X is normally held in engagement with the arm V by a spring Y and at the inner end of the dog is an arm Z which is in the path of the tappet-pin A that projects from the ratchet-sleeve IF at one end thereof. A spring-pressed pawl B engages the said ratchet-sleeve to prevent the same from rotating in a reverse direction.

On a suitable shaft 0 Fig. 7, is loosely mounted a roeking-detent D which has a horizontal engaginglip E of suitable length, and from one end of the said detent depends an inclined arm F. A spring G is attached to the shaft C and its free end bears against the rear side of the lip E and moves the detent normally in one direction. A springpressed dog ll normally engages and holds the arm F and the arm I of the dog is in the path of a tappet-pin K, that projects from the wheel 11 at one end of the ratchet-sleeve G A spring-pressed pawl L engages thev ratchet-sleeve and holds the same against reverse rotation, Fig. 6.

A substantially semi-cylindrical ratchettumbler sleeve 3 3 is loosely journaled on a shaft N and has a series-say eightof ratchet-teeth 0 which extend its entire length and are concentric with the shaft. That side of the tumbler which is provided with ratchetteeth is necessarily heavier than the other or cutaway side thereof, and therefore the ratchet-tumbler is normally in the position shown. On the center of the cut away portion of the ratchet-tumbler is a semicircular web or flange 1"", which is provided with ratchet-teeth R. Arranged on the same shaft with the tumbler M, end to end, are a pair of similar ratchet-sleeve tumblers S T, Fig. 8. Gravity-pawls U engage the flange or web ratchet-teeth R of the respective tumblers. The function of the said tumblers will appear hereinafter.

()n a suitable shaft V are pivoted three banks of finger-keys 1 2 3, there being nine keys in each bank, and the said keys of each bank being numbered consecutively from 1 to 9. Hubs or sleeves \V are formed on the arms of the keys, which bear against each other end to end and serve to space the said keys to the necessary distance apart. The inward-extending arms X of the fingerkeys pass under the rod L, which serves to connect the weight-arms, the said arms X extending to within a short distance of the ba ck of the case. Each finger-key is indcpendent of all the others and forms a lever of the first class.

Three series of vertically-movable ratchetbars 1 2 3" are maintained in position by guidebars Y or other suitable devices. There are as many of the ratchet-bars as there are finger-keys, and each ratchet-bar is pivoted at its lower end to the rear end of the arm X of its respective finger-key by means of a pin L which operates in a slightly-elongated slot A", made transversely in the ratchetbar. The ratchet-bars are arranged and maintaiued at a slight distance in front of the ratchet-tumbler sleeves, and each ratchet-bar has on its rear side a series of ratehet teeth B", which correspond in number to and are adapted to engage the teeth 0 of the ratchettumblers when the ratchet-bars are moved upward. The said ratchet-tumblers thus serve to keep the teeth F of the ratchet-bars in engagement with their ratchet-sleeves while the ratchet-bars are moving upward, and when the ratchet-bars reach the upper limit of their stroke their teeth 13 will, meshing with the teeth 0 of the ratchet-tumblers, have turned the latter about half a revolution, so that the heavier sides are uppermost, and the impulse of the ratchet-bars cause the ratchet-tumblers to complete their revolution. It willbe understood that while the teeth O are out of engagement with the teeth 3" the ratchetbars will be free to descend by their own gravity and the assistance of pivoted weight- ITO arms X, which are connected by a rod L, bearing 011 the finger-key levers, the teeth of the ratchet-bars slipping idly on the ratchetsleeves, thus restoring the bars, tumblersleeves, and finger keys to their initial position..

The upper guide-bar Y has on its front side a series of notches G which receive the rear sides of the ratchet-bars and maintain the latter at the required distance apart, and the inner sides of the said notches are inclined, as shown at D. On the rear side of each ratchet-bar, near the upper end thereof, is an inclined offset cam E, which is adapted to engage the inclined side D of its respective guide-notch when the ratchet-bar reaches the lower limit of its movement, and thereby move the upper end of the ratchet-bar forward and move its ratchet-teeth F forward laterally i ate the path of its respective ratchetsleeve. The ratchet-teeth F of the ratchetbars of each bank of finger-keys vary in number from one to nine, respectively, and correspond to the value of the numerals on the said keys-that is to say, if the finger-key be numbered 9, the ratchet-teeth F of the ratchet-bar attached to said finger-key will be ninein number,and so on. The ratchet-teeth F of thebars of eaehbankof keys areadapted and designed to engage different ratchet-sleeves. In other words, the teeth on the ratchet-bars 1", attached to the bank of keys 1 are arranged to engage and rotate the sleeve L the teeth 011 the ratchet-bars 2 attached to the banks of keys 2, are arranged to engage and rotate the sleeve G and the teeth on the ratchet-bars 3 attached to the bank of keys 3, are arranged to engage and rotate the sleeve M hence the said ratchet-teeth are differently located on the different sets of ratchet-bars.

At the lower end of each set of ratchetteethF is a shoulder or stop G which, by engaging its respective revoluble ratchetsleeve when the ratchet-bar reaches the upper limit of its stroke, will absolutely prevent further rotation of the said sleeve, and hence prevent the numbered disk geared to and operated by the said sleeve from moving too far and registering the wrong number.

At the upper end of each ratchet-bar 1 is a forward-extending arm 1 and pivoted to the front end thereof is a depending link-arm 1. Each of said link-arms hasan offset shoul- (.ler H on its front side near its lower end, adapted to be engaged by thelip of the rocking-detcnt T and on the rear side of each of said link arms, at a suitable distance from the lower end thereof, is a shoulder I", which is adapted to' engage a tooth on the sleeve G as will be hereinafter more fully described. A spring K, (see Fig. 6,) attached to each arm 1*, has its lower end bearing against the rear side of one of the link-arms, the function of the said springs being to normally hold the link-arms forward in position to cause their shoulders I to be thrown out of engagement with the ratchet-sleeve G At the upper end of' each ratchet-bar 2 is a forward-extending arm 2'==', and pivoted to the front end thereof is a depending link-arm 2. Each of said linlearms has an offset shoulder L on its front side, adapted to be engaged by the lip of the rocking-detent D and on the rear side of each of said link-arms 2 at a suitable distance from the lower end thereof, is a shoulderM, which is adapted to engage with the ratchet-sleeve M The ratchet-bars 8 attached to the last bank of keys, are not provided with linkarms, such as hereinbefore described.

In the front side of the upper portion of the case is a longitudinal opening a, which is covered with a sheet of transparent glass. Arranged from end to end of .the case, one above the other, and at suitable distance 'in rear of and below the opening 7, are a pair of horizontal guide-bars R. In openings in the said guide-bars are arranged three sets of vertical tumbler-rods l 2 3, which are equal in number to the ratchet-bars and are arranged in the same vertical planes with the arms N of the ratchet-bars. A series of tablets 1 are attached to the upper ends of the rods 1, and similar series of tablets or indieaters 2 3' are attached to the upper ends of the rods 2 3, respectively. Said tablets are normally below the level of the opening 0', out of sight. The tablets Ware numbered from 1 to 9 and indicate tens, and the tablets 3' are numbered from 1 to 9 and indicate hundreds. Each tablet corresponds in value to its respective finger-key.

From the foregoing itwill be understood that the highest value or number that may be indicated by the tablets 1 2 3 when the tablet of highest value of each series is presented behind the opening is 999, the nine appearing thus: 9 hundreds, 9 tens, 9 units.

Then a fin ger-key is operated, its respective ratchet-bar, as the latter rises, strikes the lower end of its respective tumbler-rod, and thereby causes the appropriate tablet corresponding to the value of the sum to be noted to appear before the openings in the case. Springs S are coiled on those portions of the tumbler-rods between their guide-bars R and the lower ends of said springs bear on collars T on said tumbler-rods, and thereby normally force the latter down, and hence move the tablets below the opening in the case.

A trip-bar Y is arranged lengthwise in the case and has vertical arms Y at its ends, which are pivoted to the ends of the case and adapt the trip-bar to oscillate. Studs A limit the forward movement of the trip-bar, and springs 13, which bear against the rear side of the arms Y, keep the latter normally in engagement with the studs.

IVhen a finger-key is operated,the force of its ratchet-bar is suflicient to strike the lower end of the tumbler-rod with such force as to drive the collar on the tumbler-rod upward, entirely across the cam-face of the trip-bar. As soon as the collar passes up beyond the trip-bar the springs of the latter force it back under the collar, thereby retaining the latter and its tumbler-rod at the upper limit of their stroke, and consequently the tumblerrod will be maintained in such position as to display its tablet before the opening untilanother finger-key is operated. lYhen this is done, the instant the next ascending tumblerrod collar engages the trip-bar and the latter is moved rearward, the collar on the tumblerrod which has since thelast key was operated been supported in an elevated position will be released, when its spring will instantly force it down to its normalposition and withdraw its tablet from display.

The mechanism hereinbefore described is adapted for computing sums in addition, and the operation thereof for this purpose is as follows: Before the initial operation of the machine all of the disks 1 2 3 l: 5 G 7 8 9 must be turned with their 0 or zero marks opposite the opening P, and this must be effected by the means hereinafter described. We will assume that the first sum to be noted is of the value of five units. The operatortouches the key 5 of the bank 1, and by so doing causes the ratchet-bar attached to said fingerkey and having five ratchet-teeth F to ascend, said teeth engaging the ratchet-sleeve L and turning the same 011 its shaft through a space equal to the width of five ratchetteeth or five -tenths of its circumference. This sleeve, being geared to the disk 1 by the wheels N e 1, sleeve 1 and wheel 1, causes the said disk to also rotate through the same proportion of its circumference, and thereby presents the number 5, indicating units, to the appropriate opening P. At the same instant the said ratchet-bar operates the tumbler-rod having the tablets 5 in series 1 to be moved to display five units. The same initial impulse of the finger-key which operated the ratchet-bar and registering mechanism will also cause the bar L to rise and lift the weight-arms X. \Vhen the operator removes his finger from the key, the weight-arms, by causing the rod L to depress the inner end of the finger-key, return the latter to its normal position and cause the ratchet-bar to descend with it. \Vhen another key of the value, say, of four units has been operated, the sleeve L will have been turned through nine-tenths of its revolution, and will have brought its tappet-pin A to a position adjacent to the upper side of the arm Z of the dog X and the disk 1 will have been turned to bring the number 9 or the sum of five plus four before the appropriate opening P.

'0 will assume that the key of the value of one unit is now operated, which will cause the appropriate ratchet-bar of the series 1*" and having only one ratchet-tooth F to engage the ratchet-sleeve L on its ascent and turn the same through a distance equal to one space or the width of one tooth, and thereby complete the rotation of the said sleeve. As the latter effects this complete rotation, the tappet-pin A beingin engagement with the arm Z of dog X as before stated, will depress said arm and cause the dog to release the arm Y of the rocking-detent T, when the spring V will instantly move the said detent rearward. 011 the succeeding descent of the ratchet-bar the said detent will engage the link-arm 1, attached to said ratchet-bar, and said link-arm will be moved rearward thereby against the resistance of the spring K", and the shoulder I" of said link-arm will engage one of the teeth of the ratchet-sleeve G geared to the tens-disk 2 by the mechanism hereinbefore described, and as the ratchet-bar and link-arm complete their descent the shoulder l' of the link-arm will rotate the sleeve G through a space equal to one-tenth of its circumference, and hence cause the tens-disk 2 to turn through one-tenth of a revolution, from 0 to 1, and present the latter number to the appropriate opening P.

The shape of the shoulder I is such that as soon as it has moved the sleeve one space the next succeeding ratchet-tooth of the said sleeve will engage the rear side of the link-arm and push the shoulder 1' thereof out of engagement with the said sleeve G'-,

and hence the latter will be only moved the required distance, and as the link-arm continues to descend after thus disengaged from the sleeve G its offset shoulder or cam H" will continue to engage the detent T and in moving down across the lip thereof will return the said detent to its initial position and cause its arm V to be engaged again by the dog X which will retain the rocking-detent T in its initial, position until the sleeve L has been moved through another complete revolution.

From the foregoing it will be understood that as often as the sum of the values registered by the bank of units-key 1 exceeds ten the sleeve L will be automatically operated to cause the tens-disk 2 to be moved one space and present its next highest number to the appropriate opening P.

\Vhen a key in the tens-bank is operated say the key of the value of three tens, or thirtyits ratchet-bar :2 is caused to operate the sleeve G through a space equal to threetenths of its circumference, and consequently the tens-disk 2 will be moved a corresponding distance by the gear-wheels which connect it to the sleeve G \Ve have assumed that the said disk 2 has been already moved one space by the previous operations of the link-arms of the ratchet-bars attached to the unit-keys of bank 1. Consequently the three spaces through which the said disk 2 is now turned by the aforesaid appropriate key and ratchetbar of the bank 2 will cause the number indicating four tens, or forty, or the sum of three tens plus one ten, to appear on said disk 2 through its appropriate opening P.

It is understood from the description hereinbefore given of the tablets or indicators that the appropriate one of the latter will be displayed whenever a finger-key of any bank is operated. The highest number that may be registered by the disks 1 2 is ninety-nine, when the figures nine of said disks are displayed. Each time that the sleeve G is caused to make a complete revolution, either by the ratchet-bars attached to the keys 2 or by the link-arms of the ratchet-bars attached to the keys 1that is to say, either by registering tens or the sums in tens of units its tappet-pin K will engage the arm 1 01? the dog 11 and cause the latter to disengage its arm F of the rocking-detent E and consequently on the succeeding descent of one of the ratchet-bars 2 the said detent will engage the offset shoulder M on the 1ink-arm 2, attached to said ratchet-bar, and said link-arm will be moved rearward thereby against the resistance of its spring, and the shoulder M of said link-arm will engage one of the teeth of the ratchet-sleeve M geared to the hundreds-disk 3 by the mechanism hereinbefore described, and move said sleeve M one space, and thereby operate the disk 3 one space and cause its next highest number to appearbefore the appropriate opening P.

\Vhen one of the finger-keys in the bank 3 is operated, the ratchet-bar attached to said key is caused to partly rotate the disk 3 the required number of spaces to indicate the sum in hundreds plus the sum in units and tens previously indicated.

When the sum of all the operations is more than nine hundred and ninety-nine, the disk 3, indicating hundreds, will be turned by the mechanism hereinbefore described to such position as to cause its pin p to engage one of the pins 0 of the wheel h and move the latter one space, and hence cause the said Wheel, which meshes with the Wheel at, to move the latter and its disk 4 one space, and thereby cause the figure 1 on said disk, indicating thousands, to appear before the appropriate opening P, and so on until the said disk 4 has been caused to make a complete revolution,when the pin 19 on said disk 4 will engage one of the pins 0 on wheel 1' and cause the latter to move the disk 5 one space, and thereby indicate ten thousand plus and ninety-nine million nine hundred and ninety nine thousand nine hundred and ninety-nine; but by increasing the number of disks and the operating wheels and pins the machine may be adapted to indicate sums up to any amount.

From the foregoing description it w1ll be clear that three sums, exclusively in units, tens, and hundreds, may be registered simultaneously by depressing the appropriate finger-key of each bank.

A machine constructed with three banks of keys such as shown is capable of registering at a single operation any sum less than one thousand; but byincreasing the numbers of banks, ratchets, sleeves, ratchet-bars, link-arms. and rocking-detents the machine may be rendered capable of registering at a single operation a sum of any desired amount.

In order to prevent more than one key of each bank from being operated at the same instant, I provide a rectangular open frame E, which is arranged in the rear side of the case. Vertical bars divide the said frame into as many divisions as there are keys. The rear ends of the finger-key arms extend through the said divisions, and at the end or the latter are stops or studs H. A series ot eight rolling disks 15 are arranged in seats or ways 15 in each division of the same, and above the spaces between the pairs of said arms. The combined width of all the disks in a single division plus the width of one of the key-arms X is equal to the space between one pair of the stops or studs H". Hence when the rear end of one of the finger-key arms X is moved upward when the key is operated said arm rolls the disks laterally, and the latter open only a sufficient d stance to clear the said arm before they come in contact with the stops or studs 11", and consequently render it impossible to operate another key of the same bank.

Arranged across the case, near the rear side thereof, is a lock-plate L, which has its ends provided with pivots M that bearin the ends of the case. The said lock-plate is at a slight distance in rear of the frame E, and has the dependingfiange N and the inclined offset 0 the latter extending toward the frame E and the said flange N of the lock-plate has its lower edge in a plane slightly higher than the upper sides of the linger-key arms when the latter are at rest. The flange N is below the pivots hi and the offset 0 is above the same. A spring P bears against the rear side of the lock-plate at a point near its center, and normally retains the lock-plate 1n the position shown,with its flange N inclined rearward a suifioient distance to clear the rear ends of the finger-key arms. The operation of this portion of the machine is as follows: Vhen a finger-key of one or more banks is depressed, the inner ends of the arms thereof rise, and by engaging the inclined offset 0 partly turn the lock-plate on its pivot and cause the flange N to move forward over the arms of the remaining keys, and hence lock them and prevent them from being operated until after the pressure on the finger-keys in use has been remoy'ed and the said keys have returned to their initial position, when the spring 1 restores the lockplate to the position it formerly occupied.

I will now describe my improved mechanism whereby the computer is adapted to be used for the purposes of subtraction, multiplication, and division.

A shaft B, which is exactly similar to the shaft G, is arranged parallel with the latter and at a suitable distance in front of and below the same, and has its ends journaled in bearings in the ends of the ease and adapted to move endwise therein. A coiled extensile spring 0 is arranged near one end of the shaft B and bears between a shoulder D thereon and one end of the case, and to the projecting end of the shaft is pivoted a cam-lever E, which is adapted to be used for moving the shaft endwise, this cam-lever being in all respects similar to the cam-lever 011 the shaft G, previously described. Loosely journaled on the shaft 13 are a series of disks 1' 2 3 t 5' 6 7 8 9, which are of the same size and construction as the adding-disks on the shaft G, their numbers being in the same order as those on the adding-disks, and have spurwheels 1" 2 3 i 5" 6" 7 8" 0 respectively, which are adapted to mesh with the respective wheels on the said disks on the shaft G. A shaft 1* is journaled in suitable bearings in the case, has a spur-pinion 1 at its inner end, which engages the wheel 1, and at the outer end of the said shaftis a circular milled head 1, by which the shaft may be readily turned by the fingers to cause the disk 1 t0 revolve. A similar shaft has a spur-pinion 2 engaging the wheel 2 and has also the head 2. A similar shaft has a spur-pinion 3 engaging the wheel 3 and has also the head 3. A similar shaft 4* has a spur-pinion 4C engaging the wheel 4", and has also the head 4:. A similar shaft 5 has a spur-pinion 5 engaging the wheel 5", and also has the head 5. A similar shaft 6 has a spur-pinion 6 engaging the wheel 0 and has also the head 6. A similar shaft 7 has a spur-pinion 7 engaging the wheel 7", and has also the head'T. A similar shaft 8* has a spur-pinion 8 engaging the wheel 8", and has also the head 8. A similar shaft J has a spurpinion t) engaging the wheel 9, and has also the head 9. Thus the disks 1 2' 3 t 5 6 7 S 9 are adapted to be revolved independently of each other and in either direction. The spur-wheels of said disks are of sufficient width to enable the said disks and spurwheels to be moved laterally by the endwise movement of the shaft 1 without disengaging said spur-wheels from said pinions. The numbers on the disks 1 2 3 4: 5 6 7 S 9 appear successively when said disks are rotated before a series of openings R in the front side of the case, below the openings P.

I will now describe the operation of myinvention to perform examples in subtraction. \Ve will assume that it is desired to subtract the sum of 27,777 from 45,835. To accomplish this the shaft G must be first moved endwise by its cam-lever in the manner hereinbefore described, so as to disengage the spur-wheels of the addingdisks from the spur-wheels on the shaft T, and thereby render them capable of rotation in either direction. The cam-lever, when turned outward from the end of the ease, maintains the shaft in this position, as will be readilyunderstood. The shaft l3 must also be moved simultaneously with the shaft G to keep its disks in gear with the adding-disks. Then by turning the appropriate disks .1 2 3 4t 5 by means of their respective shafts and pinions the disks 1 2 3 4: 5 must be turned to cause the number of 45,935 to appear before the openings P. The disks of higher value than those involved in the example should not be operated. Ilavin g thus brought the number 45,835 before the openings 1, the operator causes the shaft B to move endwise, so as to disengage its disks from the adding-disks, and he then turns the said disks on shaft 1 to the 0 or zero-mark and moves the shaft B, so as to re-engage its disks with its addingdisks. To facilitate the description of the operation of the maehine,Iwill designate the disks on shaft- G as the adding or primary disks and those on the shaft- 13 as the secondary disks. llaving arranged the disks involved in the computation in the manner j ust described, the operator turns the secondary disks in progressive order of their numerals until the lesser sum, 27,777, involved in the computation appears on the recordingdisks before the openings R. By thus turning the secondary disks the primary disks geared thereto will be moved in reverse order and cause numerals of decreasing value to appear before the openings P, and when the lesser sum, 27,777, shall have been indicated by the secondary disks, as before stated, the remainder, 18,058, will appear before the openings P.

\Vhen multiplying, the multiplicand must be first caused to appear on the primary disks before the openings I the secondary disks being then at O or zero, as before, and then, beginning with the secondary disks of lowestvalue, said secondary disks will be turned in reverse order until they display the multiplier before the openings R. 13y thus revolving the secondary disks in reverse order the primary disks will be turned in progressive order, and the instant the multiplier appears before the opening R the product will be indicated by theprimary disks before the opening P.

It will be understood that the primary disks must be in gear with the carrying-wheels f 9 7L 1'. 7; 7 m a while being operated for the purposes of multiplication, in order that units of a lower denomination will be carried to IIO those of a higher denomination, and that inasmuch as the said primary disks are turned in progressive order when multiplying it is necessary to have the pawls I) out of engagement with the carrying-wheels which work with the spunwheels of said disks. To accomplish this, I have devised a trip-shaft E arranged under the said pawls and having an offset, crank, or arms F adapted to engage the lower sides of the pawls when the trip-shaft is turned, and thereby disengage the paWls from the carrying-wheels, as will be readily understood. The trip-shaft has one end projecting beyond one end of the case and provided with a head G: or an arm whereby it may be turned.

In using the machine for the purposes of division the primary disks must be set to cause the dividend to appear before the opening P, While the secondary disks are at zero or 0, and the latter are then turned in progressive order, beginning With the disks of highest value, until the divisor appears before the openings B. This movement of the secondary disks causes the primary disks to be rotated in reverse order, and when the divisor is indicated, as before stated, the primary disks will have been turned to such position as to cause the quotient to appear before the openings P, as will be apparent.

It will be seen that the secondary computing-disks on the shaft B and their shifting and rotating devices constitute a secondary mechanism which practically converts a cashindicator into a calculating-machine capable of performing all the ordinary functions of arithmetic.

. It will be apparent that modifications may be made in the shifting and rotating devices for the secondary computing-disks, and I do not therefore desire to limit myself in this particular.

Having thus described my invention, I claim- 1. In a computingmachine, the primary disks, the carrying devices connecting the same, for the purpose set forth, and the secondary computing-disks geared to the primary disks, said primary and secondary disks being numbered in the same order, all in combination, substantially as described.

2. In a coi'nputing-machine, the combination of the adding or primary disks, the carrying-wheels geared thereto, the secondary computing-disks numbered in the same order as the primary disks, and means, substantially as set forth, to shift said secondary and primary disks into and out of gear with each other, substantially as described.

In a computing machine, the primary registering-disks having carrying devices, in combination with the secondary computingdisks numbered in the same order, means, substantially as specified, to move said primary and secondary disks into and out of gear with each other, and devices to independently revolve the secondary disks.

4-. In a computing-maehine, the combina-' tion of the laterally-movable primary disks, the finger-keys and connecting devices to operate the same, the relatively-fixed carrying- Wheels adapted to gear to the primary disks, the detents to prevent retrograde rotation of the carrying-wheels, the secondary computing-disks adapted to be shifted into and out of gear with the primary disks, and the trip device to release the detent from the carrying-wheels, substantially as described.

5. In a computing-machine, the combination of the laterally-movable primary disks, the finger-keys and connecting devices to operate the same, the relatively-fixed carryingwheels adapted to gear to the primarydisks, the detents to prevent retrograde rotation of the carrying-wheels, the secondary computing-disks adapted to be shifted into and out of gear with the primary disks, the trip device to release the detents from the carryingwheels, and the devices to independently rotate the disks. r

6. The combination of the eudwise-movable shafts, the primary and secondary registering-(lisks thereon and capable each of independent rotation, the finger-keys and connecting devices to operate the primary disks, the relatively-fixed carrying-wheels adapted to gear to the primary disks, the detents to engage said carrying-wheels, for the purpose set forth, and the trip device to release said detents, substantially as described.

'7. In a computing-machine, the combination of the endwise-movable shafts, the in dependently-revoluble primary and secondary registerin g-disks thereon and adapted to gear the levers to move the shafts, and thereby throw said primary and secondary disks into or out of gear with each other, the independentlyrevoluble shafts geared to the secondary disks, the relatively fixed carrying- Wheels adapted to gear to the primary disks, the finger-keys and mechanism to operate the primary disks, the detents or pawls to engage the carrying-wheels, for the purpose set forth, and the trip devices to disengage the pawls or detents from the carrying-wheels, substantially as described.

8. In a computing-machine, the combination of the primary disks, the secondary computing-disks, means to shift said primary and secondary disks into and out of gear with each other, and the independent shafts having the pinions engaging the secondary disks, whereby the latter may be independently rotated, substantially as described.

9. In a computing-machine, the combination of the ratchet-sleeves geared to the primary indicating-disks, the ratchet-bars to engage the sleeves when moving in one direction, and the Weighted ratchet-tumbler sleeves engaging the ratchet-bars and cut away on one side, and secondary mechanism, for the purpose set forth, substantially as described.

10. In a compnting-machine, the combination of the ratchet-sleeves and gears to operate the primary disks, the ratchet-bars attached to the finger-keys and operating the ratchet-sleeves in one direction, and the ratchet-tnmbler sleeves to maintain the ratchetbars in gear with the rz'Ltehet-sleeves when moving in one direction and release them therefrom when moving in the reverse direction, and secondary mechanism, substantially as described.

11. In a eompnting-maehine, the combination of the ratchet-sleeves and gears, the primary disks, the ratchet-bars connected to the finger-keys and operating the ratchetsleevesin one direction, the revoluble ratchettnmbler sleeves engaging said ratchet-bars to maintain the latter in engagement with the ratchet-sleeves when moving in one direction and having the eccentric or cut-away faces to release said bars from said sleeves, and secondary mechanism, substantially as described.

JOHN SIIARPE.

Witnesses:

MARY BISHOP, S. A. TERRY.

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