US1195567A - draughon - Google Patents

Description

W. H. DRAUGHON. CAtCULATING'AND RECORDING MACHINE APPLICATION FILED AUG. I0, 908.

Patented Aug. 22, 1916.

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CALCULATING AND RECORDING MACHLNE.

APPLICATION FILED AUG.IO,1908.

Patented Aug. 22, 1916.

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I APPLICATION FILED AUG-10,1903. 1 1 9 5 ,5 67 Patented Aug. 22, 1916.

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W. H. DRAUGHON.

CALCULATING AND RECORDlNG MACHINE.

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INVENTOH 4 ATTORNEYS WITNESSES w. H. DRAUGHON.

CALCULATING AND RECORDING MACHINE.

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Patented Aug. 22, 1916.

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CALCULATING AND RECORDING MACHINE.

I APPLICATION FILED AUG. 10. I908- Patented Aug. 22, 1916.

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W. H. DRAUGHON.

APPLICATION FILED 'AU G. 10. I908.

CALCULATING AND RECORDING MACHINE.

w. H'. DRAUGHON.

CALCULATING AND RECORDING MACHINE.

W. H. D-RAUGHON. CAkCULATlNG AND RECORDNGMACHINE-I APPLICATION men Aue.10. isoa. 1,195,567.

H SHEETS-SHEET l4- Patented Aug. 22, 1916.

UNITED STATES PATENT OFFICE.

WILLIAM HENEY DRAUGHON, OF SPRINGFIELD, TENNESSEE, ASSIGNOR TO HURILOUGHS ADIJING MACHINE COMPANY, OF DETROIT, MICHIGAN, A COR- IEQEA'IIQN OF MICHIGAN.

CALCULATING AND RECORDING MACHINE.

Specification of Letters Patent.

Patented Au 22, 1916.

Application filed August 10, 1908. Serial No. 447,915.

and Recording Machine, of which the following isa full, clear, and exact (lescrlption.

This invention relates to certain improvements in combined adding and recording machines. and relates more particularly to mechanism whereby the machine may be employed t'or subtracting directly without any mental computation or may be employed for listing a series of positive and negative amounts. giving the balance or difference in their sums and indicating whether said balance be positive or ncgative.

In a machine invi'ilving all of my imgn'oycments. the numbers are punched directly on the numeral keys, and a reversing lacy or lever is moved to one position if the number is to be added, and moved to a sec ond position it the number is to be subtracted. Fpon operating the machine, the numeral wheels may be rotated in either direction to increase or decrease the total, de pendent upon the position of said reversing key or lever. The machine operates to print the actual total. whether it be positive or negative, even though the numeral wheels show only the complement of the negative balance. In printing. the numeral wheels are rotated to the zero position and stopped thcrc, the direction of rotation of said wheels being dcpendcnt upon whether the total or balance be above or below zero. The actual numbers are printed on the strip of paper, irrespective of the position of the reversing licy or lever, but said key .or lever is automatically shifted it the total or balance be on the opposite side of zero from the last number listed. The machine also operates independently of the printing mechanism to automatically indicate whether the total printed bea positive or a negative one.

The detail mechanism by means of which I secure the results above indicated may be varied to adapt the invention to various ditijypcs of machines. but the invention is especially adapted for that type of machine in which a scries of numeral keys are provided for each numeral wheel. and in which an. operating member rotates each wheel, the extent of movement of said op erating member being dependent upon which one of the series of. keys is depressed-before starting said operating member.

In order that my invention may be fully understood, I have illustrated the'details of one form which it may assume, and illustrated this form in connection with an addmg and recording machine, the main features of which do not constitute any.portion of my invention. The particular machine in connection with which I have illustrated my improvements is substantially that shown in the lnitcd States Patent to ll". H. Pike, J12, Number 763.692. issued June 28. 1904, but I wish it distinctly understood that-my invention is not limited in any way by said patent, and that the details of said patent are illustrated merely as one example of an adding and recording machine. To facilitate reference to this patent and the description and operation of the mechanism, I have employed in the following description, as far as possible, the same reference characters as are used in said patent. to indicate the corresponding parts.

Reference is to be had to the accompanying drawings. forming a part of this specification, in which similar characters of ref crencc indicate corrcspomling parts in all the figures, and in which- Figure 1 is a side elevation of a machine constructed in accordance with my invention. a portion thereof being broken away: Fig. 2 is a side elevation of the controlling mechanism for thetotal and sub-total printing mechanism; Fig. 3 is a p an view of the parts shown in Fig. 2} Fig. 4 is a top plan View of the front portion of the machine; Fig. 5 is a top plan view of the rca r portion of the machine, the numeral keys and the recording mechanism being rcmovcd: Fig. 6 is a sectional side elevation of parts shown in Fig. 4, portions thereof being broken away: Figs. (l and (3 are dctail sections on the line (i 6 and (W 3" oi Fig. (3: Fig. 7 is a. side elevation of the parts shown in Fig. l, the reversing lcvcr being in position for adding; Fig. 8 is a vcrtical section on the line S-8 of Fig. 4: Fig. J is a sectional side clcvation similar to Fig. 7. but with the parts in position for printing the minus or negative total or balance: Fig. 10 is a transverse section on the linc 1U-1U gas of Fig. 7; F 11 is a perspective view of a lever employed. in the automatic mechanism which controls tlle'reversing keympon the printing of total; Figs. and 13 are vertical. longitudinal sections on the lines TQMTO 5 id l3-13, respectively, of Fig. 14; is VldW similar to Fig. 12 but with parts changed relationship such as occurs in negative totaling operation with respect to the units and tens numerical orders; Fig. 13 is a similar View illustrating changed relationships of parts in the tens and hundreds numerical orders; Fig. 13 is another View of the same character but illustrating corresponding changed relaticnships of pants in the hundreds and thou sands numerical orders. Fig. is a l1ori zontal section on inc Figs. 15, 16, and It? perspective views of the detents emaloyed in connection with each numeral wheel; and lFi, is a dc"- l persp tive oi. a sleeve, crank arm, and stop illnsir-uted in Figs. 12, 1-56, and it, and employed only in printing minus or negative totals.

Before proceeding to a detail description of the naeclianis 'i involving my invention, will briefly describe certainportions of the machine in connection with which T have illustrated my invention; For a more full and d. iled description, reference may he iiad the Pike patent above referred to. .51 ite mmwml wheel TO tatingmecimatam for v Ja n-1 i the front portion of machine iployed a plurality of numeral clef i each having a pinion and mounted, "within a swinging frame T). Tlieill rame includes a plurality of arms 390 joarnaled on a shaft 320 and held rigid in respect to each other by a transverse rod 392. Beneath each pinion there is mounted a rack 05 whiclnwhen the frame is lowered, engages with its corresponding pinion to rotate said pinion and its numeral wheel upon the longitudinal movement of the tacit. Each rack is carried by a longitudinallymovable strip and is movable iogagitu dinally in respect to said strip a dis ance equal to the distance between the centers of adjacent teeth. is controlled by a studdfil on the raclt engaging in av recess @62 in the strip. A spring T60 normally tends to hold the in its rearward position relative to the strip. Each strip extends henea lo a series of keys 201, and is provided with aplarality of stops 430, which may engage w; a when the latter are depressed. The stops are so disposed in respect to the keys that when key is depressed and. the strip is permitted to mov the movement w l-bc-depcndea particular key depressed .li unit lengthgweatcr the 1 key; that is, 1: ao lee do upon he one the of l2;

The extent of movement forwardly, the extent of strip permitted to move forwardly, it may more one unit length, in which case there will he no accompanying movement of the associated rack, while if the 1 key be depressed the strip may move two units, its lack moving one. Tl. the 9 key be depressed, the strip maagmove-ten units, the rack mov ing' nine. Each strip at its rear end is connected to the lower end of the type lever 403, and all. of the type levers are normally held rearwardly by carried by depending arms 400. The arms 4.00 also carry a roller 4:02 with which a controlling plate 900 engages. The plate 900 is mounted on the main operating shaft 922, which latter may he oscillated in any suitable manner, as, for instance, by a main opeiaiting crank or lever 922. The plate 900 is so formed that when the shaft 922 has licenrotated a short distance, the strip a transverse strip 401' 401 is permitted to swing forwardly out of type levers, and the engagement with the are allowed to come forwardly strips 404:

under the action of springs 404 until they are stopped by the numeral keys. After not moved forwardly until after all of the strips 40% have completed their forward movement and the ed positions in respect to the pinions, but out of engagement. therewith. All of this mechanism is substantially that shown in the Pike patent, and. constitutes no portion of my invention. r

Tile numeral wheel actuating mechanism for eebtmctiag.-Tn my improved mechanism I employ, in addition to the old rack 105, a second iacl: 405*" substantially paral lel to the reeled-05 and spaced therefrom at such a distance that the corresponding pinion. may. lie between the two racks and out of engagement with either. The frame EU is capable of being swung upon the shaft 320 as a pivot, so to bring the pinion into engagement with either rack, so that in the normal operation of the machine, the racks having moved toward the front end of said machine under the influence of their springs, may, upon the return movement, operate to rotate the pinions in eitherdirection, dependent upon, the position of} the frame D. In adding, lowing the frame l) to being; the pinions into engagement with.

plate 901, which latter is racks are in the adjustv forks is offset so as to lie in a different plane from the other. -The upper edge of the lower fork 714 is provided with a notch or recess 714, and the lower edge of the up- 'per fork is provided with a recess 714. Suspended. from artransverse rod 309, I pro-, vide two arms 309,and 310. The'two arms are so disposed as to lie adjacent to, but upon opposite sides of the two forks 714 and 714 The arm 310 carries an inwardlydirecti-o stud 310, and the arm 309 carries a similar outwardly-directed stud 309". Normally these two studs are indirect alinement with each other and in alinement with the two recesses 714 and 714, so that when the strip 714 is in its raised position, as in-' dicated in Figs. 6 and 6 the stud 309 will enter the recess 714, and the strip and the arm 309 will be locked together to create an adding condition. When the strip 714 is in its lowered .position, the stud 310 will enter the recess 714 and the strip will be locked to the arm 310 tocreate a subtracting g a! dition. I

For raising and lowering the forward end of the strip 714, I employ a bar 1018 pivoted intermediate its ends upon a stud 1018 and having its forward end connected by a stud 1018 to a depending link 1017, which latter has its lower end connected to the strip 714. Intermediate the ends of the bar 1018 is an upwaidly-extending lever 1018, hereinafter referred to as the reversing lever, inasmuch as the position of this level determines to which of the arms 309 and 310 thestrip 714 is locked. The lower end of the arm 310 is provided with an upwardly and rear wardly-extending slot 310 adapted to engage with one end of a roller 305 carried by the arm 305 at its rear end, whereby when the arm 310 is swung toward the front of the machine by theaction of the, link 714, the roller upon entering the slot will raise the arm and the frame D and bring the pinions into engagement with the'upper racks 405 The arm 309 is also provided with a slot at its lower end, but this slot 309 extends upwardly and forwardly, so that when the arm 309 is swung forwardly the upper edge of the slot engages with the roller 305 and forces the arm 305 downwardly to bring the pinions into engagement with the lower racks 405, The two arms 309 and 310 are so constructed as to tion'. It will thus be noted that as the link .714 moves forwardly at each operation of the machine, the particular rack into which each pinion is forced will depend directly upon the position of the reversing lever 1018". In adding, the reversing lever is in the position indicated in Fig. 6, and the strip 714 is locked to the arm 309, so that the arm 305 is forced downwardly, bringing the pinion 385 into engagement with the rack 405, and the return movement of the strip 404 and its rack 405 rotates the numeral wheel to increase the amount indicated thereon, To subtract, it is merely necessary to bring the reversing lever for wardly to the position indicated in Fig. 9 and operate the keys 201. As the. bar 714 is now locked to the arm 310, the pinion will be forced upwardly into engagement with the rack 405", and the return movement of the strip 404 will rotate the numeral wheels in the reverse direction and decrease the total indicated thereon.

Thec'arrg ing mechanism for (ulding.ln all adding machines of this type it is neces-. sary that each numeral wheel upon completing a revolution will operate to rotate the adjacent numeral wheel of higher denomination through one unit space. For accomplishing this during adding, I provide a de tent 303 (Fig. 12) for each numeral wheel, said detent being pivoted at its rear end and of substantially the form indicated in Fig.

16. Each detent is provided with an offset vor shoulder 303" adjacent its forward end,

and the terminhl portion 303 beyond this shoulder constitutes a cam portion. Intermediate the ends of each detent a portion is bent laterally to form a lug 303 extending at substantially right angles from the detent I adjacent the lower edge thereof and upon the opposite side from the shoulder or step 303*.

Each numeral wheel is provided with :1 laterally-extending stud 311 which is disposed closely adjacent the shoulder 303 when the numeral wheel is in its zero position, and the rack 405 of one numeral wheel is provided with a stud 405 extending laterally and normally engaging the front side of the lug 303 of the detent of the numeral wheel of next lower denomination. The lug 303 normally limits the rearward movement of the rack bar and maintains the spring 460 undcr tension. When the adding wheels are ice lSt

1000 is provided with turned from. zero in a direction indicated by the arrow (Fig. 12), the studs 311 are carried away from the shoulders 303 and when each wheel has turned nine units its stud 311 will nearly contact with the in? clined edge 303. As each wheel moves through its tenth step or unit, its stud 311 will Contact with the cam 303 to depress the 'detent 303, so as to move the lug 303 out of the path of the stud 105 on the rack that coiiperates with the adding wheel of the next higher order of numbers, and that rack will be permitted to move one step farther on its return stroke than it otherwise would have moved. This accomplishes the carrying of one unit to the next higher order during the adding operation. The operation of this detent is substantially the same as the corresponding detentin the Pike patent. The detent is held down after being depressed by the vertically disposed pawls 304 which engage with the upper edges of the detents 303 an bear against shoulders it on the latter. The detents are held depressed until the pawls 304 are forced forwardly. out of en-- gagement with the shoulders it by the movement of the rod 324:, which action also causes the rod 325 to restore the racks to their normal position, leaving the studs 405 in corn tact with the lugs 303 The numeral wheels, when not in engagement with either of the racks, are positively held against rotation by stationary pawls 307. These pawls are carried by the trameand each has a laterallyextending portion which engages in a scalloped flange on the side 'of'each numeral .vvheel' Fl 41. When the numeral wheels (l their flanges come above the latthcy are lowered they come below said extem" sions, so that-the wheels may freely rotate when in either the raised or the lowered position, but are held from rotation when in the intermediate position.

Borrowing mechaniem. lln subtracting, the reversing lever 1018 is in its forward position, and the numeral Wheels are raised to bring their pinions into engagement with the racks an, as "above described. The studs 311 now'corne above the oletents 303, and the numeral wheels rotate in the opposite direction. For eli'ecting the borrowing operation during subtracting, ll provide a detent 1000 adjacent each detent 303 and mounted upon-the same pivot. Each detent a laterally extending shoulder 1000 disposed above the shoulder 303 and inclined in the opposite direction trom the inclination or the cam 303. As a numeral wheel is rotated in subtracting and as the zero gives way to 9, thestud 311 Will-come in contact with theinclined edge 1000 and force the This carries with it the detent identically the-same detent 1000 downwardly.

303, and edect is produced as when the detent 303 is depressed by direct engagement of the stud 311 therewith; that is, the rackol the adjacent numeral ofhigher denomination is liberated to go one unit space farther than it otherwise would, and asit is rotated to effect a subtracting action the unit that is transferred to the next higher order is subtracted instead of added. Mounted upon the same pivot with the detents303 and 1000, I provide a third detent 1001 for zero setting purposes under subtraction adjustment of parts, having an oil set shoulder 1001 a cam lower edge 1001 and a vertical terminal end edge 1001. This detent is unafiected by the stud 311 during the adding operation (being above the path of movement ofstud 311), and during the subtracting the stud 311' engages with the cam 1001 and merely hits it up out of the road to pass beneath without any transfer effect. Adjacent the base of the detent 1001 (Figs. 12 and 15) there are provided two projections 1001 and 1001 The former of these does not in any way affect the. transfer operation. but is adapted to be engaged by a stud 1002 in the printing of a negative total, as will be set forth more fully hereinafter. The projection 1001 engages beneath a portion of the frame of the machine and serves to limit the downward movement of the free end of the detent, as will be seen from Fig. 12.

ltzis thought that the mechanism whereby the machine operates/to either add or subtract will be understood from the above description, particularly when considered in connection with the Pike patent above referred to.

Clearing and total printing mechanism for positive totaZs.-So long as the machine registers on the numeral wheels added amounts, or so long as the added amounts are in excess of the subtracted amounts, the operation of clearing and printing totals is practically the same as in all add ng; machines of the type illustrated. The opera tion of the particular mechanism illustrated may be briefly described as follows, reference being had to Figs. 2 and 3: llpon depressing the total key 102, arm 713 is loweredso that its notch or recess embraces the roller 750, and in the ensuing operation of the machine the plate T07 carrying said arm is caused to rotate hy the engagement of the roller 952with the dog 7 llhus, with the reversing lever in the adding" position, the pinions' are brought into engage ment with the racks 405 at the outset, and.

the strips having been liberated by total hey connections not shown (but see the aforesaid patent), they may come forward as the cam plate 900 moves upward. and rotate the numeral wheels until each of said numeral Wheels is in its zero position.

As each wheel rotates a distance dependent upon the unit indicated'by that wheel, and as-the strips 404 and the type levers 403 move a distance dependent upon the extent of rotation of the numeral wheels, the type levers will be in a position to print the correct total upon the paper on the roller 880. After the printing operation, the return movement of the plate 901 will bring the roller 952 into engagement with the dog 711 and the pinions will be brought out of engagement with the racks, so that they will remain in their zero position and the entire machine will be clear, ready to start anew.

Had the sub-total key 702 been depressed instead of the total key, the dog 711 would not be operated upon during the return movement of the plate 901 (because displaced by the lever 705), and the pinions would have remained in engagement With the racks during the return movement of the latter, and the total would again be brought to view on the numeral wheels, ready for the addition thereto or the subtraction therefrom of other amounts. This clearing and total-printing while the rever ing lever is in the adding position is not per sec of my invention, but fully disclosed in the aforesaid patent.

Clearing and total-painting mechanism for negative t0tals.-Ifthe subtracted amounts listed on the machine be in excess of the added amounts, the dials will show a quantity equal to the difference between the correct negative total and the total capacity of the machine (in the present instance 1,000,000,000), i. 0., the complement of the true negative total, and when the machine is cleared in this condition, of

course, this complemental number would be printed on the paper strip if no mechanism other than that above described were provided. To prevent this and to cause the machine to print the exact negativetotal when the. total or sub-total key is depressed,

I provide mechanism illustrated particularly in Figs. 5, 12, 13, 14, and 18. Pivoted to each strip 404, except the units strip, is a lever 1002 having an inclined edge 1002 which, when the lever is raised, engages with the pin 461 and locks the latter at the forward end of the recess 462, so that there can be no movement of the raclrrelative to the strip. Normally, the racks remain Sta. tionary during the first unit length of the movement of the corresponding strips 404, due to the slots 402, but these levers 1002, 'vvhen in operation, prevent this lost motion. Adjacent each lever 1002 I provide a bar- 1003 having a horizontal slot 1003 therein for receiving the stud 1002 carried by the lever 1002. The lever is thus free to move longitudinally of the bar, but its cam edge upward movement of the bar 1003, For

raising and lowering the bar, a second her 1004 is mounted adjacent thereto and sub stantially parallel therewith, and is I vided with studs 1004 which engage w in cam slots 1005 iirthebar 1003. As t bar 1004 is moved longitudinally, the acti of the cam slots and the studs is such as to raise the bar 1003 vertically. it is guided in its vertical movement by the ei' gagement of a retainer 1010 carried by the frame of r the machine and extending through a vertical slot 1003 adjacent the end of the bar.

Extending across the machine and be" neath the strips 404 is a transverse rod 1009 free to move longitudinally of the machine 3 a limited distance, for a purpose hereinafter described. For moving this rod, 1 provide links 1025 see Figs. 1 and 5) each having an elongated slot adjacent its front end for receiving the rod 1009 and each having its rear end pivoted to a pivot pin carried by the depending arms 400. The rod 1009 normally held in its rearward position and against stops 1028 by coil springs 1027, and the rod is normally at the front end of the slots in the links 1025.

Loosely mounted upon the transverse rod. 1009 and extending forwardly therefrom. I provide a plurality of levers 1005, (meter each bar 1004, save the one corresponding to the units numeral wheel. These levers are normally held in anelevated position, so that they may freely move back and forth independently ofthe bars 1004, but each lever is provided with a transverselyrxtending end portion 1005 which when the lever is lowered may engage in a notch 1004 in the bar 1004 so as to :a use the bar 1004 to move with the lever 1005. Thus, the levers 1002 may be brought into engagement with the studs 401 to hold the latter in the forward ends of the recesses 462 by the forward movement of the arms 400 in case the levers 1005 are in their lowered. position and locked to the bars 1004. 1 For normally holding the levers 1005 in hair ed. position out of engagement with the bars 1004, I provide a til11SV61'S6ly-9X- tending ed 1008 having a plurality of sleeves 1006 rotatable thereon but heldfr'om 3 longitudinal movement in respect thereto. Each eeve is provided with an. pwardly extend arm G terminating in a lateral extension adapted to engage with the under side of and uphold the lever 1005 'be- 1 longing to the neXt higher numerical order (see Fig. Adjacent each sleeve 1006 there are inc-: plurality of s ationarylugs 1007 win-eh normallyengage'vvith the under sides of the several arms 1006 to support the latter and prevent the sleeves from rotating. By moving the rod 1008 longitudinally, each. of the arms 1006 is brought out of engagement with its supporting n 1007 and the several sleeve. pernx' to rotate, so that the several levers 1005 may drop. into engagement with the bars 1001. Rigidly secured to each sleeve 1006, and

' in addition to the arms 1006, are two arms 1006 and 1006, and by means of these arms the sleeves may be rotated to'either raise the arms 1006 and the levers 1005 or lower the arms 1006 into engagement with the I supporting lugs 1007. For engagement with these arms 1006", eachstrip 104 is provided -Withan auxiliary strip 40s rigidly secured thereto on the left-hand side, and for engagement with the arms 1006 each strip is provided-with a stud 40 1 projecting from the right-hand side in transverse alinement with the'forward end of theauxiliary strip jacent and in line with the front ends of the corresponding auxiliary strips 404:, the arms l006 remaining behind and closely adjacent to the corresponding studs 4:04

which are elongated for the purpose of preserving the engagement. Now, when a strip 104: is moved forwardly, the front end of its auxiliary strip 104: engages with the arm 1006 of the associated sleeve 1006 to positively rotate the latter and let down the associated lever 1005 into engagement with the bar 1004:. The parts are so proportioned that the lever 1005 does not become locked to the bar 100 1 unless the strip l moves forward a distance of more than one space. Thus the sleeve 1006'has a rocking range of approximately 60 and advance of the strip only one step or unit of movement, as illus- 'trated in Fig. 13 rocks it but approximately 30 and so does not lower the flange 1005 of the lever 1005 into the notch 10043.

During further advance of the strip a sec- 0nd unit of movement, however, the said flange will move down into the notch. After the strip 104 has reached its limit of movement in excess of one space and starts to return, the lever' and bar remain locked 'together (by reason of the straight under ed 'e of the strip 1049 wiping over the end of t e arm 1006") until the strip'4l04 reaches less than two spaces from the end of its return movement. Here the stud 4.04 engages with the upper end of the arm 1006 and the sleeve1006 is rotated and its arm 1006 rises, so that upon the longitudinal movement of the sleeve 1006 to the left, said arm may pass'over the lug 1007 and be held thereby in its elevated position.

In order that the functioning of that portion of the mechanism just above described maybe fully understood, a concrete example' will'be taken. Supposing that the machine has accumulated subtracted amounts in excess of the added amount to the extent of 59 901 That is to say, the amount 5990- in the adding position, and the total or subtotal key down, but when either one of the total keys is depressed while the dials are carrying an amount resulting from subtract ing more than has been added, the mechanism shown in Figs. 7 to 11, inclusive, which will be described later, Will'automatically' set the reversing lever in the subtracting position and will" automatically shift the shaft 1008 and-allot its sleevesand cranks a short distance to the right of the operator. This movement brings all ofthe crank arms 1006" into operative relation with the strips $10411 as above described, and will move the arms 1006 off of the lugs 1007. Hence, all of the sleeves are in readinose to be operated upon the movement of the strips 40%. As the reversing lever is in I the subtracting position, all of the pinions 885 will rise to engage with the upper racks 405 and during the forward stroke of the operating handle all dials will tend to rotate in the direction of the arrow in Fig. 12. 1f the studs 311 are already in contact with the edge'1001 of the detents 1001 those dials will remain substantiallyv stationary (except under certain conditions hereinafter described), but those. dials whose studs" are at a distance from the edges or stops-1001 will rotate a number of steps equal to the diii'erence between the figure shown on the numeral wheels carrying said studs and zero. in the example assumed, the unitsdial will show zero already, and its stud 311 will be already in contact with the edge 1001, and this dial will not rotate. The actuating strip Ocorrespondihg to this dial will travel only one step, and zero of the type will be brought to the printing point. As before explained, and as illustrated in Fig. 13, this limited or one-space advance of the strip is not suliicient to so far rotate the sleeve 1006 as to lower the lever 1005 of the tens-order into engagement with the bar 1004:. Tllherefore, in the example or plate 1003 are broken outto disclose the units rack more fully and avoid confusing the units stud 461 with the similar stud of the tens rack.) Here. it should be noted that the lost motion provided for-by the slots in the links 1025 is such as to delay advance of the cross-rod 1009 until there has been time for the levers 1005 to become

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