USRE20199E

USRE20199E - Carrying mechanism for tabulating

Info

Publication number: USRE20199E
Authority: US
Publication date: 1936-12-08

Description

W. W, LASKER.JR

CARRYING MECHANISM FOR TABULATING MACHINES Original Filed Sept. 18, 1928 5 Sheets-Sheet 1 Dec. 8, 1936.

W. W. LASKER, JR

CARRYING MECHANISM FOR TABULATING MACHINES original Filed sept. 18, 1928 5. Sheets-Sheet 2 Dec. 8, 1936. w. w. LAsKER, JR

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CARRYING MECHANISM FOR TABULATING MACHINES Qriginal Filed Sept. 18, 192B 5 Sheets-Sheet 5 L A Snoantoz Reissued Dec. 8, 1936 UNITED STATES PATENT OFFICE William W. Lasker, Jr., Brooklyn, N. Y.

Original application September 18, 1928, Serial Divided and this application December 4, 1929, Serial No. 411,477. Patent No.

1,925,262, dated September 5, 1933.

Application for reissue August 28, 1934Serial No.

5 Claims.

This invention relates to carrying mechanism for tabulators and like devices, and is a division of my pending application Serial Number 306,711, led September 18, 1928.

'Ihe principal object of this invention is to provide a suitable carrying or tens-transfer mechanism for a tabulator operable by data cards or documents having data indicated thereon by deposits of electrical conducting material, such, for instance, as the document shown in my United States Patent No. 1,567,325, issued December 29, 1925.

Another object is to produce a novel carrying device for a registering device in which one portion of the cycle of operation is devoted exclusively to registering and another portion to carrying.

Another object is to produce a device of this nature which may be operated at very high speed.

Other objects will be apparent from the following specication and appended claims. All of these objects are attained by mechanisms shown in the accompanying drawings, in which:

Fig. 1 is a fragmentary front elevation partly in section of a machine embodying the invention, certain parts being omitted for the sake of clearness.

Fig. 2 is a front-to-rear vertical sectional view of the same.

Fig. 3 is a timing diagram for the machine cycle.

Figs. 4, 5, 6 and 7 are timing diagrams or charts for respective cams..

Fig. 8 is a detail View of the driving gears.

Fig. 9 is a detail view of the accumulator shaft drive and resetting means.

Fig. 10 is a. typical wiring diagram.

Figs. ll, 12, 13 and 14 are views of respective cams, and the mechanism directly operable thereby.

Fig. 15 is a detail view of the accumulator controlling devices.

Fig. 16 is a fragmentary detail top plan view of the sensing brush devices.

Fig. 17 is a detail sectional view of several accumulator wheels.

Fig. 18 is a detail of one of the cam operated bars.

Like characters of reference refer to like parts in all views.

The frames Referring to the drawings in detail, and in particular to Figs. 1 and 2, 20 represents the main base plate which may be 'supported in any suitable manner, as by a supporting frame 2|. Secured to and extending upwardly from the base plate 20 are

side frames

22 and 23 and intermediate frames 24 and 25. A cover 26 of suitable form encloses and protects the top part of the machine, and is provided with a suitable aperture 21 for viewing the accumulator dials.

M ain driving mechanism A belt 28 is constantly driven from a motor or other source of power (not shown); and this belt drives a pulley 29 mounted for rotation on bearings 30, Fig. 1. Bearings 3|) are mounted on a short shaft 3|, which shaft may be connected to the pulley 29 by means of a clutch indicated generally at 32. This clutch may be of any suitable well known type, so that the details of its construction will not be described. The clutch shown in the drawings is of the "Bendix" type.

The shaft 3| passes through an aperture in a gear housing member 33 secured to the frame member 24 and carries a gear member 34, Fig. 8. The shaft 3| has one bearing in frame 22, Fig. 1, and the gear member 34 is recessed to admit a bearing carried by a stud (not shown) on frame 24. This gear 34 meshes with a gear 35 on a shaft 36 mounted on bearings in frames 24 and 23. Gear 35 meshes with a broad gear 31 secured on a shaft 38, gear 31 in turn meshing with a gear 39 on a shaft 4|! and with a large gear 4| on a short shaft 42. The large gear 4| meshes with a second broad pinion 43 fast on a shaft 44, and pinion 43 meshes with a pinion 45 fast on a shaft 46.

Shafts

38, 40, 44 and 46 are all mounted in bearings in the intermediate frames 24 and 25, and carry intermeshing

gear pinions

31, 39, 43 and 45, these pinions and bearings being protected by housings formed by the intermediate frames 24 and 25 and associated housing members 33 and 4l. The short shaft 42 is mounted in bearings in the frame 24 and in a bracket 48,y

-cam shaft 5| mounted in bearings in the

frames

22 and 23.

Gears

49 and 50 are enclosed in a housing formed by frame 23 and a housing member 52. The specific cams on this shaft and the mechanism operated thereby will be hereinafter fully described.

Mounted on the left-hand end of cam shaft 5| and secured thereto so as to be rotated therewith is a mutilated gear 53, Figs. l and 9, which engages a mutilated gear 54 rotatably mounted on the accumulator shaft, 55, and normally clutched to said shaft 55 by means hereinafter described, so that rotation of gear 53 normally effects intermittent rotation of accumulator drive shaft 55.

The main driving mechanism has now been described, and it will be seen that the shafts for driving the card-feed devices, the cam mechanisms, and the accumulator wheels are all interconnected and, therefore, work in perfect timed relation or synchronism.- I shall now take up the details of the card-feed devices.

Card-feed.

As shown in Fig. 2, three

bars

56A and 51 and 58 extend between and are supported by the intermediate frames 24 and 25. Supported by the

bars

56, 51 and 58 and extending upwardly therefrom is a card magazine 59.

Bars

51 and 58 are spaced apart so as to form a card throat 60 thru which only one card may pass at a time. The cards placed in the magazine 59 rest upon the upper surface of bar 51 and on the sides of the picker frame.

A picker frame 6I is mounted for sliding movement in ways 62 formed in the frames 24 and 25 or in pieces secured thereto and is provided with a picker blade 63 which may be adjustable if desired for different thicknesses of cards; and which is adapted to pick off the bottom card in the magazine 59 and force it thru the throat 68 when it (the picker knife) is reciprocated by the picker frame. The above mechanism is similar to that now in use with punch-card equipment and any type of such well-known mechanism could be used.-

The picker frame 6I is connected to a link 64 which has its rear end eccentrically connected to a disk 65 mounted on and rotatable with the shaft 42, Fig. 1. It will now be apparent that at each cycle of gear 4I and shaft 42, the picker frame 6I will receive one complete reciprocation thereby ejecting one card thru throat 68.

Mounted on

shafts

38, 48, 44 and 46 are feed rolls 66 of any desirable and adequate material; and as a card is ejected from throat 60, it is introduced between the feed rolls on

shafts

44 and 46 and by them passed on to the feed rolls on

shafts

38 and 46. 'I'his last pair of rolls passes the card into a card receptacle 61, Fig. 2. One of the Walls of this receptacle is extended upwardly into a card-deflecting plate 68; while another wall is of insulating material and is extended to the throat 66 forming a card guiding table 69 formed with apertures to accommodate the feed-rolls 66. The bottom of the receptacle 61 may be in the form of a spring-pressed plunger 10, as in common practice in punch-card equipment, and which moves down under the accumulated Weight of the cards 1I. As the cards are moved along the table 69 they are sensed as to their data and the mechanism for this purpose will now be described.

Sensing means The sensing mechanism includes a plurality of pairs of contact brushes 12, there being one pair of brushes 12 for each column or denomination or order of data on the card or document to be sensed. 'I'he brushes of each pair are arranged close enough to each other to be bridged by a data indicating spot or mark on the document to be analyzed, and the pairs 0f brushes are spaced apart according to the columnar spacing of the card or document. The several brushes 12 are held in alignment between two strips 13 of insulating material which are pressed together by metal plates 14 screwed together and supported by frames 24 and 25 or other suitable means. 'I'he brushes 12 are thus held stationary and in such relation to the card support 69 as to Wipe along the several columns of the card as the card is moved by the feed rolls, so that the brushes of any pair will be connected by a data spot in that column.

The brushes of each pair are connected to respective leads 15 and 16, Figs. 10 and 16; and each pair of leads 15 and 16 forms a cable 11 which is conducted to the rear of the machine as shown in Fig. 2. In Fig. l0, there is shown the circuits controlled by one pair of brushes 12. From this figure it will be seen that the lead 15 passes to the positive side of a B battery, while the lead 16 passes to a lead 18 connected to the negative side of an A battery. This lead 16 is connected to the grid or a thermionic valve 1 9. The usual filament circuit is shown as including an inlet lead 88 and an outlet connection to lead 18. The plate circuit is shown as including leads 8l and 82 connecting, respectively, a B plus terminal with a relay 83, and relay 83 with the plate. When the grid circuit is closed by a data spot on the card closing the gap between the two brushes 12, the plate circuit is caused to energize relay 83 sufficiently to overcome the spring on its armature as is well understood by those familiar with the properties of thermionic valves. Thus it Will be understood that `relay 83 is always partly energized due to current passing from the plate to the filament, but normally this isr not sufficient to cause relay 83 to overcome spring 85; however, the grid acts as a valve and allows, in this case, more current to pass thru relay 83 when a data mark is contacted with, so that the relay is sufficiently energized to overcome the tension of spring 85.

When relay 83 is thus energized it attracts its armature 84 against the tension of spring 65,I

lator wheel as will be later specifically described:

'Ihe leads 89 and 9| associated with any pair of brushes form a single cable 93, Fig. 2, which cable has at its end an outer contact member 94 connected to one of the leads 89 or 9 I and a contact point 95 connected to the other of these leads.

Elements

94 and 95 are, of course, properly insulated from each other. A supporting member 96 suitably supported by a stationary part of the machine, carries all of the magnets 90, the magnets being arranged in different tiers and in staggered relation so as to obtain the desired compact arrangement. One terminal of each magnet is connected to a contact member 91 provided with a socket 98 which receives and closes contact with contact element 94. The other terminal of each magnet is connected to a spring contact 99 adapted to engage the corresponding contact pin 95.

It will now be apparent that the terminals of the several cables 93 are supported by frictional engagement of elements 64 and 90 and Athat any cable may be connected to 'any magnet so that data appearing in any column may be made to control 'anydesired one of the magnets 90, so as to transpose data as they are enteredon the register. Having now described the sensing mechanism, the accumulating or registering mechanism will next be taken up.

Registering mechanism The register comprises any desired number of accumulator lwheels |00, Figs. 1, 2, 15 and 1'1 each of which has a ratchet wheel |I secured to it. The accumulator wheels with their ratchet wheels are free to rotate on shaft 55 but are held against longitudinal displacement thereon in any desirable manner. Secured to the shaft 55 so as lto rotate therewith are a plurality -of friction disks |02, one for each wheel |00, which are serratedat their-outer edges and cupped so as to form friction fingers. All of the friction fingers of a disk bear against the inner face of its respective wheel I 00 so that when shaft 55 is turned it carries with it disks |02 and thereby tends to turn all of the wheels |00.

It may be stated that the number of accumulator wheels |00 may be the same as the number of Item columns on the documents or may exceed this number vwhere it is desired to have extra wheels in which to accumulatesurplus carried up from any of the wheels. Each wheel is provided with two series of digits 0 to 9, inclusive.

Normally, the wheels |00 yare prevented from 'turning with shaft 55 by stop fingers |03 which Vengage the respective ratchet wheels |0|. These stop fingers |03 are formed on slide bars |04 pivote'd at. |05 to respective rock arms |06. These rock arms |06 carry respective armatures 92 and are pivoted on two bars |01 and |06, Fig. 2, from which they extend either downwardly or upwardly, as the case may be, so as to accommodate themselves tothe -positions of the magnets 90. {The ends of arms |06 are guided by fingers |00 which extend into slots I|0 formed in thev front edge of a'stationary cross bar yI I.

It will now be understood that when a magnet 90 is energized, it effects rocking of its respective arm |06 against the force of its spring 300 thereby drawing the respective slide |04 rearwardly so as to move its iinger |03 out of engagement with the respective ratchet wheel |0I so that the associated laccumulator wheel |00 may turn with the shaft Also pivoted on each pivot pin |05 is a pawl having an upper arm II2 provided with a stop shoulder II3, and a lower arm II4 to which is attached one end of al spring I |5. 'I'he other end lof springl I5 is attached to slide |04. so that the spring I5 holds the respective slide down against a bar I|6 and holds the upper arm ||2 normally against the under face of a plate |I1 supported by a stationary bar 13|. When an arm |06 is rocked, the respective pawl I |2-I I4 is drawn rearwardly until the shoulder I|3 escapes plate I I1 at which time spring I5 rotates the pawl so as to bring stop shoulder I I3 up in rear of plate I |1 thereby locking the members |06, |04 and ||2- ||4 in retracted position. The arms I I2 are later moved down by a universal release bar I i8 as later described. Springs 300 hold the arms |06 and connected parts forwardly.

Turning now to Fig. 9, it will be seen that gears 53 and 54 are both mutilated so that during a complete rotation of gear 53, which is coincident with one complete cycle of operation of the machine, there will occur two half revolutions of -gear 54 separated `by considerable dwells or pcriods of idleness. Considering gear 54 locked to shaft 55,'th'is will impart two half revolutions to shaft 55. One of these half revolutions is utilized to effect adding, and the other to effect carrying.

The cards or records are fed to the brushes 12 with their highest digit position first and lowest digit position last. Consequently if a data spot is in a. higher digit position it will traverse its brushes and operate its magnet 90 some time earlier in the cycle than the magnet would have been operatedif the data spot had been in a lower digit position. Thus if the spot is in "9 position its magnet will be operated to release the respective accumulator Wheel so that it will travel nine digit spaces before the dwell in the move- -ment oflshaft 55 occurs; and if a spot is in the l position, the accumulator wheel will be released so much later vthat it will move only one digit space. During the ensuing dwell after an adding operation, bar II8 moves down and releases all of the elements I I2, whereupon any members |04 which had been moved back to permit adding, are again moved forwardly into engagement with their ratchets |0I If any accumulator wheel has been turned 'past its "9 indication during adding, one must becarried up to the next higher accumulator wheel during the last half-cycle of operation, and the means for this purpose will now be described.

Each pawl I2I normally supports a slide |21 which is slotted to permit the passage of the finger |03 of next higher denominational order. the bottom of the slot being normally substar.` tially in contact with the respective finger |03. The slides |21 are guided for vertical movement by slots formed in plates |28 and |29 supported, respectively, by stationary members |30 and |3!. The slot cut to permit passage of finger |33 divides each slide |21 into two upwardly extending elements the upper rend of which is bent forwardly into a finger |32, and the upper end of the other of which is bent rearwardly into a finger 320. The finger |32 of each slide carries one end of a spring |33, the other end of which is anchored to one of a plurality cf fingers formed on the front edge of plate |29, which spring tends constantly to force the respective slide |21 downM wardly. The fingers |320 of the several slides lic over a universal restoring bar |34 which will be later described.

Whenever one of the tappets ||9 engages the co-acting pawl nger 20, it rocks the pawl clockwise, as seen in Fig. 15, thereby removing the pawl from supporting position, whereupon the respective spring |33 moves its slide |21 down in rear of pawl I2| until finger |320 reaches bar |34, thereby removing the bottom of the slot of |21 from engagement with the respective finger |03, which, it will be remembered, is of the next higher order to that of the accumulator wheel which caused the tripping action. At the end of the dwell between the adding and carrying operations, bar |I6 is moved down by means which will be later described, and any fingers |03 which have had their slides |21 moved down will move down with bar II6 due to springs |I5 which hold the slides |04 down against bar |I6. This movement is accompanied by the rotation o-f the accumulator wheels corresponding to the fingers |03 so moved which rotation is now caused by the second half revolution of shaft 55. The amount of such movement is limited to a single digit space by bar I|6. If successive accumulator wheels stand at 9, and one is carried by the lowest of these, carrying will take place successively during this half rotation of shaft 55.

After shaft 55 has turned its second part revolution there is a second dwell, and during this dwell a bar |35 moves rearwardly carrying with it all of the arms |06 with their members |04 until all ngers |03 are disengaged. Bar I|8 being still down the shoulders I I3 are not effective. Bars I|6 and |34 now move up, lifting all slides |04 and |21. Pawls I2I snap back to normal. Then bar |34 moves down to normal and bar |35 moves forward to normal so that all fingers |03 again return to engagement with their ratchets; and then bar II8 moves up ready for the new cycle of operation.

The means for operating bars IIS, II8, |34 and |35 will now be described.

Cam shaft operation Referring now particularly to Figs. 1, 2, 4, 5, 6, 7, l1, 12,113 and 14, it will be seen that cam shaft carries eight cams, four at each side of the machine. Each cam at one side of the machine is the duplicate of one of the cams at the other side, so that we have a pair of cams for operating each of the four bars II6, ||8, |34 and |35.

Two cams indicated at |36 are located at the extreme right and left of the groups of cams, and these two cams are utilized to operate bar II 6 thru means shown in Figs. 2 and l2. Pivotally mounted on studs or stub shafts |31 secured to the opposite side frames of the machine, are rock levers |38, each of which is provided at its front end with a roller |39 riding on the periphery of its respective cam |36. The rear ends of levers |38 are pivotally connected to upright links |40 rigidly connected to opposite ends of the bar ||6, the ends of bar I I6 being extended as at I4I and guided in ways |42 in the side frames as indicated in Fig. 18. Suitable springs |43, Fig. 12, may be attached to levers |38 to keep the rollers |39 in constant contact with the cams |36.

The two cams adjacent to cams |36 are indicated by reference character |44; and these two cams are identical and operate means shown in Figs. 2 and 11, to eet proper movement of bar I8. This means includes two rock arms |45 pivotally mounted on a thru-shaft |46 supported by the main side frames of the machine. Each rockarm |45 carries at its front end a roller |41 riding on the respective cam |44, and has an upright link |48 pivotally connected to it between its ends. These links |48 are connected at their upper ends to the cross bar |8 by .means similar to that for ||6 shown in Fig. 118; and they move bar ||8 in conformity with the peripheries of cams |44. Suitable springs |43 hold the rollers |41 in contact with the cams |44.

Clearing When it is desired to clear the machine or turn the accumulator wheels to zero, means shown in Figs. 1 and 9 is utilized. This means includes a manipulative pin I6I, which has grooves |62 which cooperate with a spring-pressed ballato held the pin in either of two positions. At its inner end pin |6| has a conical cam portion |64 terminating in a reduced cylindrical portion |65.

Secured to shaft 55 so as to turn therewith is a disk |66 which carries a rotatable pin |61. Pinned to the inner end of pin |61 is a pawl or dog |68 which is normally pressed by a spring |69 into engagement with a notch ory recess formed in the periphery of a hub-like member pinned on pinion 54 thereby locking disk |66 to gear 54..,

The right-hand end of shaft 55 is provided with a disk |12 and a clutch tube |13 both of which are secured to shaft 55 so as to turn with the latter. The clutch tube |13 has Ways |14 formed therein at its free end, which ways are diametrically opposite each other and cut angularly. Slidably mounted in the housing member 52 is a Short shaft which carries a disk |16 secured thereto for rotation therewith. A pin |11 extends thru the shaft |15 and projects on opposite sides thereof. The inner end of shaft |15 extends into the clutch tube |13 by which it is guided in its sliding or longitudinal movements. A handle or crank |18 is secured to shaft |15 so that the latter may be moved ylongitudinally and rotated by an operator. When shaft |15 is pressed in and turned counter-clockwise (as viewed from the right), the ends of pin |11 enter the ways or slots |14, and shaft 55 is thereby secured to shaft |15 ao that by turning handle |18 counter-clockwise, shaft 55 will be turned in the same direction which is the opposite direction to that in which it is turned for adding. A spring |19 is interposed between disks I12 and |16 and tends constantly to disengage shafts 55 and I 15 and to hold the latter in its outward position.

When it is desired to clear the machine-i. e., turn allof the wheels |00 to zero,-the shaft 55 is rst disconnected from the regular driving mechanism as above described. Then handle |13 is pressed inwardly and turned so as to cause shaft |15 to effect entry of the ends of pin |11 into the ways |14. Upon further turning of handle |18, shaft 55 is rotated in a direction opposite to that for adding and carries with it all of the accumulator wheels |00 and their coacting ratchet wheels IOI until a tooth I-I0 of each ratchet wheel abuts against a respective nger |20. When any tooth I I9 engages a nger |20, the respective ratchet Wheel and accumulator wheel are stopped, and at such time the accumulator wheel is at zero. When the shaft 55 has been sufficiently turned to bring all accumulator wheels to zero, the handle |18 is released and spring |19 effects disengagement of shaft |15 from shaft 55. It is, of course, understood that fingers |03 merely ratchet over the teeth of the ratchet wheels during this clearing operation.

Splitting Means are provided'for splitting the accumulator wheels into sections for separately accumulating various series of items. For this purpose means are provided for disabling the carrying mechanism at any desired point or points.

As shown in the drawings, a pivot rod |80 (Fig. 2) is supported in the main frames of the machine, and carries a plurality of rock members IBI, one for each carry latch |21. The upper ends of members |8| project thru the casing 2G so as to be readily movable back and forth by the operator and are held in either of two positions by friction or other suitable means. The lower portion of each member IBI stands in rear of a respective iinger |320 and is formed with a notch |82 for engagement with said finger. When any member I8I is rocked to one extreme position its notch |82 engages the respective iinger |320 thereby preventing carrying action of the respective member |21; but when the member I8I is moved to its other position, notch |82 is entirely in rear of finger |320 and the canying is effective.

Timing Considering now the sequence of operations and timed relation of parts, we shall arbitrarily fix as the normal position or start of a cycle, that position of the parts at the instant that the mutilated gears 53 and 54 stand as shown in Fig. 9 just ready to begin the adding portion of the cycle. The cycle is graphically indicated in Fig. 3 by a circle, on which the essential points of operation are indicated by letters. Thus the point A indicates the normal position as above defined. At this point the adding portion of the cycle is about to begin and barsv IIB, |I8, |34 and |35 and connected parts stand as shown in Figs. 11 to 15.

The adding portion of the cycle is indicated by the arc running from A to B. At point B the adding operation is complete; the lower dwell shown in Fig. 9 is beginning; cam |44 is beginning to lower I I8; and the card has passed completely thru the sensing zone.

The arc between B and C represents the portion of the cycle consumed by cam |44 in bringing bar I0 to its lowest position. At point C the bar I I8 is in its lowest position and remains there until point F is reached; also cam |35 begins to lower bar I I6 at point C.

The arc between points C. and D represents the portion of the cycle consumed bycam |36 in completely lowering bar I I6. A-t point D the bar I I6 is down; and the carrying portion of the cycle is about to begin, the lower dwell of Fig. 9 having been finished.

Tnecarrying portion of the-cycle is represented by the arc between points D and E. At point E the upper dwell of Fig. 9 has been reached and begins to take effect. for moving bar |35 rearwardly.

Bar |35 is moved rearwardly by cam |50 during that portion of the cycle. represented by the arc from E to F, Fig.. 6, andat point F the cam |50 is fully. effective and cam |55 begins to be effective. During the portion of the cycle represented by the'arc between points F and A, cam |55 becomes fully effective thereby raising bar |34 and with it all of the carrying latches |21 which have been moved from their normal position. At substantially the same instantcam |36 causes the raising of bar I|6,.cam |504 releases bar |35 to move back to normal so that all of the members |03 again. engage their respective ratchet wheels, and after the members I 03 have started their return movement cam |44 again permits the raising of bar II8 to its normal position, which rais.- ing it will be remembered is effected by springs In Figs. 4, 5, 6 and '1 the cams are shown in their normal relation to their respective rollers and the cycle of their operation is marked with the same indi-cia as used in Fig. 3 altho it must be borne in mind that in these charts the letters refer to the portions of the cams effective on the rollers at the different points indicated by the same letters in the graphic representation of the machine cycle shown in Fig. 3. It might be that best results in the actual machine would be obtained by setting the cams a few degrees one way or the other; but, of course, the same sequence of operation of the elements would be retained as above described.

While I have described what I consider to be the most desirable embodiment of my invention, it will be obvious that many changes and substitutions of equivalent elements could be made without in any way departing from the spirit o1' my invention. I, therefore, do not limit myself to the exact embodiment herein shown and described nor to anything less than the whole of my invention as hereinbefore set forth and as hereinafter claimed.

I claim:

1. In a device of the class described, the combination of two accumulator wheels of successive denominational orders, a respective detent for each of said accumulator wheels, individual means for retaining each detent in normal position, common means for retaining said detents in normal position, means controllable by the accumulator wheel of lower order for rendering the individual retaining means of the accumulator wheel of higher order ineffective and means for automatically moving said common means to ineffective position.

2. In a device of the class described, the combination of two accumulator wheels of successive denominational orders, a respective detent for each of said accumulator wheels, individual means for retaining each detent in normal position, common means for retaining said detents in normal position, means controllable by the accumulator Wheels of lower order for rendering the individual retaining means of the accumul bination of two accumulator wheels of successive denominational orders, a respective detent for each of said accumulator wheels, individualk means for retaining each detent in normal position, common means for retaining said detents in normal position, means controllable by the accumulator wheels of lower order for rendering the individual retaining means of the accumulator Wheels of higher order ineiective, means for automatically moving said common means to ineiective position, and a manipulative device for retaining each detent in normal position regardless of the condition of said individual means and of said common means.

4. In a device of the character described, the combination of two accumulator wheels of successive denominational orders, a respective detent for each of said accumulator wheels, individual means for retaining each detent in normal position, common means for retaining said detents in normal position, means controllable by the accumulator Wheel of the lower order for rendering the individual retaining means of the higher order ineffective, means whereby the detent of the higher order is controllable by the common retaining means while the individual retaining means of the higher order is ineffective, common means for moving said detents to ineilctive position, individual means for retaining said detents in ineffective position, common means for restoring each detent to normal position, and common means whereby the individual means for retaining the detent of the higher order in normal position is restored to effective position.

5. In a device of the character described, the combination of two accumulator wheels of successive denominational orders, a respective detent for each of said accumulator wheels, individual means for retaining each detent in normal position, common means for retaining said detents in normal position, means controllable by the accumulator wheel of the lower order for rendering the individual retaining means of the higherorder ineffective, means controllable by the common retaining means for moving the detent of the higher order so as to allow its accumulator wheel to advance one digit space while the individual retaining means is ineffective, common means for moving the respective detents to ineffective position, individual means for retaining said detents in ineffective position and common means for automatically restoring said detents to normal position and common means for automatically restoring the said individual retaining means to effective position.

f WILLIAM W. LASKER, JR.