US1328847A

US1328847A - Alculating-machine

Info

Publication number: US1328847A
Application number: US129927A
Authority: US
Inventors: Pentecost Arthur
Original assignee: WALES ADDING MACHINE Co
Current assignee: WALES ADDING MACHINE Co
Priority date: 1916-11-07
Filing date: 1916-11-07
Publication date: 1920-01-27
Anticipated expiration: 1937-01-27

Description

A. Pimcos'r.

CALCULMING MACHINE.

APPLIGATxON F!LED.N1)V.T. 1916A.

.atente 5am 32", 1920,

@sainssneu 1.

mmm. QP? Sw.

AA lPENN-:0081.

VCALCULATING MACHINE.

APPLICATION FILEDNOV. I. i916.

Patented. Jan. 27,1920.

@SHEETS-SHEET z.'

A. PENTECGS?a CALCULATING NIACHlNE.

VAPPLICATION FILED' Nov. a, 191s;

\ .auemd Jan. 27, 1920.

SHEETS-SHEET s.

. Patented Jan. 27,1920.

4 SHEETS-SHEET a.

WSS.

y: l* -4 v 'I f/ V f I i regular printing mechanism,

ATE T nemen.

ARTHUR PENTECOST, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO WALES ADDING MACHINE COMPANY, OF WILKES-BARRE, PENNSYLVANIA, A CORPORATION OF BENN- SYLVANIA.

VALCULATIN G-IIIACI-INE.

Specication of Letters Patent.

Patented J an. 27, 1920.

Application led November 7, 1916. Serial No. 129,927.

To all 'whom t may concern:

Be it known that l, ARTHUR Pnn'rncosi, a subject or' the King of `England, residing at East Orange, Essex county, New, Jersey, have invented. /new andv useful Improife'- ments inv Calculating-liiachines, vof which the following is a specification. l

More particularly, this invention relates to automatic cleai sinn printing mechanisms i'or calculating ni-acmnes of that style wherein the sign printing hammeris normally in fired or i discharged` position, berg an improvement on the mechanism shown, for examplmin U. S. patents to lales, .t-940,758, Nov. 23, 1909, and to `-chuman, Reissue 13,334, December 5, 1911.

ln clear sign printing mechanisms of thev ibove style, it is desirable that the sign printing hammer be automatically set or cocked, incidentallyl to the performance-ot some other necessary operation l of the 'machine taking place prior to the introduction of the vfirst' item of a new list in the machine, and preferably, subsequentlyto the clearing of the machine.

One of the objects of this invention is the provision of simple and novel means, controlled by the clearing key, and operable iiicidentally to the clearing operation, to eti'ect the retraction of the sign printing hammer directly by the usual hammer-resetting member without imposing any strain upon the regular printing hammers.

Heretofore, it rhas been customary to provide a connection between the units hammer andthe sign printing hammer, to restrain the latter against discharging strokes after a clearing operation has taken place. Obviously, thisI places the clear sign printing directly under the control oi the so that in case the regular printing mechanism does not anism to restrain operate, the clear sign mechanism cannot operate. f

ln this invention, the clear sign printing mechanism is inthe nature-oil an attachment located in, .but operable by means independent ofthe regular printer, and one of the main'objects is the provision ot means independent of the regular printing mechthe sign printing hammer against firing on an idle stroke after a clearing operation;

Another object of sure the printing of the clear sign with the this invention during idle this invention is to in-` sitates the provision of means to prevent the printing of the clear signal with amounts entered after the iirst amount, or -on idle strokes intervening between the printing of the rst amount and ,thenext .clearing operation. Y t l By theI employment of a normally discharged sign printing hammer which can only be cocked as an incident to a clearing operation, the necessity for such lock as above referred to, is obviated.

To these and other ends, the invention in,- cludescertain novel features and combinations ot parts, more fully set forth hereinafter and particularly pointed ont in the claims. Y

ln the accompanying drawings, Figure l is a sectional side View, parts being omitted or broken away, illustrating` one embodiment of my invention applied to the well known Ta-les calculating machine; l

Fig. :2 is a detail side view, showing the normal, discharged 'positions of the parts;

Fig. 3 is a detail `elan view;

Fig. tis a detail side view, parts being broken awayto show the coupling mechanismwhich eiects the retraction of the sign printing hammer;

Fig. 5 is a detail, showing the sign printing hammer in cocked position;

leo

of the printer section, showing the means to resetthe sign printing hammer, and the independence of the latter. relatively to the regniar printing hammers;

Fig. 7 is fa fragmentary detail of a means to prevent the printing of the clear sign,

when the first item entered in the machine,

after a clearing operation` is non-printed;

y Fig. 8 is a view in side elevation, showing only the mechanism which operates to retain the coupling device between the sign printing hammer and the resetting mechanism, in effective position, and

Fig. 9 isa sectional view through the printer.

Although 1 have chosen to illustrate my invention as applied to a Wales calculating machine, it will be understood that the inventionv is applicable to other machines, as'

Well.

` Referring to Fig. 1, a base 965 supports side frames 967, between which are located from front to rear, the keyboard or indeX- ing mechanism, the accumulating mechanism, and the printer mechanism, respectively.

Depressing any of the numeral keys 117 arranged in denominational rows on the keyboard, projects stops 115 into the paths of corresponding denominational racks or drive members 310, each of which is pivotally supported on front and

rear arms

312 and 311, journaled on the cross shaft 300 and the cross rod 301 mounted in the side frames. Each rear arm 311 is provided with a rearvard extension 311, any of which may operate the clear sign hammer restraining means hereinafter set forth.

A restraining and restoring bar 205 normally contacts the front supporting arms to retain the drive members retired against the tensions of their drive springs 383 connected to the rear arms 311 and to the restraining and restoring bar 205.

Turning the main drive shaft 200 forwardly, swings an arm 210, the outer end of which traverses a cam slot 220n in a crank 220 connected to the restraining and restoring bar 205, to withdraw the latter from in front of the arms 312, and permit the drive sin-ings 83to advance the racks 310 until the latter are arrested by the projected stops 115or by rack detents 221 in those denominations wherein no keys have been depressed.

rllhe main drive.l shaft 200 on its forward stroke, also advances a trip rod'303 supported hy depending radius bars 323 `iournaled on the cross shaft 300, andronnected by links 2l-i with

arms

212, 210 on the main drive shaft. Near the end of the forward stroke of the main drive shaft, after the racks 310 have conipleted their advance, the trip rod 30? displaces the well known lVales counter-supporting mechanisn'i (not shown) to mesh the pinions of a series of denominational counters L190 with their re` speftivc racks 310. The counter-supporting means above referred to. is shown in U. S. patent to lVales, 940,758. heretofore mentioned, and is also found in U. S. patents to lli/'ales 797.032, April 15, 19,05; McFarland, 842,232, January 29, 1907, and White, 940,766, Nov. 1909.

The main drive shaft on its return stroke, forces the restraining' and restoring bar 205 against the arms 312 of the advanced racks to return the latter to normal position, and the racksduring their retirement, turn the pinions 435, and associated counters, to register thereon the amount represented by the depressed keys.

The trip rod 303 is also retired during such return stroke, near the end of which, it operates the counter-supporting mechanism to disengage the counters from their vdrive members, after the latter have been retired, and thus forms means to control the engagement and disengagement of the counters and their drive members.

The rack detents 221 also arrest the racks or counter drive members 310 against advance on idle strokes of the main drive shaft when no-keys are depressed.

Suitable carrying mechanism, not shown, transfers the tens from counters of lower denomination to those of neXt higher denomination. y

The ,rack-supporting

arms

312, 311 rock the racks advance and retire, and links 515 connect the rearward extensions 311 of the rear arms 311 with denominational typecarriers 514 bearing types 561, to position the types corresponding to the depressed keys,l at the printing line of a platen 2094, as the racks advance against the key-set stops 115, and to return the typecarriers to normal position upon the retirement of the racks.

I utilize a printing mechanism substantially like that shown in U. S. patents to McFarland, 924,264, June 8, 1999, Wales, 940,758, above mentioned, or Hunter & Kiintzler, 1,054,554, February 25, 1913, to which reference is made for a more complete disclosure thereof.

lndividual hammer pawls 511 (Fig. 9) journaled lon a cross rod 504 mounted in the printer side frames 565, hold the denomina# tional printing hammers 510, journaled on shaft 500, in normally retracted or cocked positions againstthe tension of thehammer drive springs 580.

The hammers 510 are also under the control of a universal catch 518 which is displaced only after the types are positioned at the printing line, to permit the hammers to strike firing pins 562 and drive the latter against the types to effect the imprint of the amount set up on the keyboard.

As' the extension arms 311n 'rock upwardly during the .forward stroke of the main drive shaft, they permit trip bars 513, under the influence of springs 583, to rise and contact the tails of the individual hammer pawls 511 to release the pawls from the corresponding hammers. Suitable cross-over tails on the respective hammer pavvls 511 of the regular printing sectiointrip the pau/'ls to the right of a positively trippedpajvl to effect cipher rintino' to Athe rieht iu the usual manner. *D D The hammers do not lire upon the release of the parvis, because restrained by the universal catch 518.

The trip rod 303', during its advance stroke, draws with it a link 526 1) connected toa lever 524 journaled on the cross shaft 508, to rock the lever, such motion being transmitted from the lever 52ei through a link 527 to another lever 525 fast supporting a bail 505 to which the upper.

ends of the hammer drivingr springs 580 are secured, the opposite ends of these springs bei-ng connected to the respective printing hammers 510. The hammer drive springs 580 are thus tensioned on the forvvard stroke ofthe main drive shaft, to swing the ham mers 510 When the latter are released, against the firing pins 562 to print the types positioned at the printing' line.

A link 528 (Fig. 1) connectedto'the rock ing lever 525, has a slotted connection with a crank 517 on ar shaft 502 journaled in the printer side frames, the universal catch 518 being fast on this shaft, so that as the main drive shaft 200 approaches the end ofA its "forward stroke, the universal catch is lifted against the tension of a spring 584 (Fig. 4)' to release the hammers for operation.

The various printer mechanism, above set forth, retire 4to their normal. idle positions on the return stroke of the mainA drive shaft. The hammer-resetting member 519 recocks or retracts the discharged hammers, the tension of the springs 580 is relaxed, and spring 584.- snaps the universal catchover the restored hammers. The extensions 311a return the ty ecarriers 514 and Withdraw the trip bars 51 to enable the' individual hainmerpawls 511 to lock the respective printing hammers in cocked position.

Depressing a total or clearing key 827, (Fig. 8) and operating the main drive shaft, effects the restoration ,of the counters 490 to Zero to clear the machine preparatory to commencing another accumulatio in the well known manner set forth, forexample,

in U. patent to McFarland, No. 852.232,

rlanuaryl 29, 190.7. y l

Depression of a non-print key l523 (Fig.

.1) against the tension of its restoring spring 4589, rocks a non-print bail or comb 524?.

journaled on the cross pin 506 to irfterpose the teeth of the comb in the paths of the trip bars- 513 to arrest the latter and thereby prevent them from displacingthe individual hammer parvis 5111i rllhus, the hammers remain cocked even When the universal atch 51S isY released, as set forth more in.

detail' in U. S. patents to Wales, No. 902,125, October 27, 1908, and to' McFarland, No.l 924,264, Janes, reca For a more complete understanding of the N ales mechanism, attention. is directed to U. S1. patents to McFarland t W ales, No. 680,157, February 25,1908; Bickford, No. 1,066,700, July 8, 1913; and Viilgus, No. 1,133,596, March 30, 1915, in addition-to those 'heretofore cited.

The foregoing mechanism constitutes no part of the present invention, except in so far as it may be combined With the novel features now to be set forth.l

The clear sign printing mechanism herein illustrated, is auxiliary to and operates independently of the regular printing hammers. The sign printing hammer 1,1 (Fie. 2) is journaled on the cross vshaft 500, similarly `to and preferably to the right of the regular i printing hami'ners 510, and is driven by a spring 5809-, one end of which is connected by a shackle 512 to the hammer, the opposite end of the spring being connected to the y tensioning bail 505. The sign printing hammer 1 unlike the regular printing hammers, normally lies in discharged or lired position (Fig. adjacent a :firing pin or plunger 562, which lies in line 'with the heel of the usual Wlales clear signal typecarrier 513h journaled on a stud 559 projecting laterally from the-right hand side frame 565 of the printer. The usual l)Wales clear sign type Q is mounted on the toe513c of the typecarrier, opposite the printing line.- A spring 5 81attached to a tail 513d of the type carrier, normally maintains the latter in retracted position against the adjacent end of the firing pinl 562, or of a flange 565oil tht side frame. l

I have contrived a simple and improved clearing key-controlled coupler mechanism located Within the machine, Where it cannot be injured, to utilize the usual hammer-resetting` member 519,509 to cock or retract the sign printing hammer 1.

llhus, the stem of the clear key 327 (Figs.

1`and 8) carries a stud 352, which, upon the y depression oi' the key, Wipes along a cani v1814: on a utility cross shaft 1801 ournaled in the side frames 967. The adjusting barwhen shifted, turns the shaft 1801, and with it a crank 2l (Fig. 2) on the opposite end of the shaft, which operates a vertically shift-A able support or carrier 3, the upper end of which is slotted, as at 41, to embrace the cross rod 501@ for guidance. Pins 5 on the offset head 6 of the carrier 3 entei slots 7 in a horizontally shiftable coupling bar or member long and short arms of the slot 9 in the coupler member, as shown 1n Fig.

()1 'dinarily, on stroking the main drive shaft 200, the actuator 10 idly traverses the long arm of the slot 9, but upon the depression of thel clearing key 327, the throw im parted to the adjusting bar 320 is sufiicient to lift the adjustable carrier 3 and its coupling member 8 relatively to the. actuator 10, to cause the shortarm of the. slot 9 to ein-- brace the actuator (see Fig. 1) the walls of which shorter slot lie at substantially' right angles to the path traversed by the ac.- tuator. Y

The support 3 and coupling member 8 are sustained in this position by the usual clearing key latch 216 (Fie: 1) which engages a stud 836 on the usual set lever 317 connected to the clearing key 327 by the catch 326", the latch216 and the usual locking rib 217 on the segment v211, operating to maintain the clearing key in depressed positionduring the forward stroke of the main drive shaft, as is customary in the )Vales machine.

YIt will be remembered that the main drive shaft 200 on its forward stroke, advances the trip rod 303 which through the linkage 520, 521, 527 and 525, rocks the shaft 50() to withdraw the hammer resetting the. bail 509 mounted in arms 519 fast on the shaft 500, out of the paths of the hammers 510, and that one of the arms 519 -whichis thus rocked, carries the clear sign actuator or stud v10, the coupling member S adjusted so that the short arm of the slot 9 embraces the actuator 10, the latter and the hammerresetting member 519, on their withd awal from the path of the usual printing hammers 510 during the forward stroke of the main drive shaft, will draw the coupling member 8 rearwardly.

The .coupling member 8 carries a hooked draft member 12 (Figs. 2, 4C and 5) pivoted thereto at 13. A follower 14 on the draft member normally rests upon a dwell 15 formed on the head 6 of the carrier, and a spring 10 connectsl the free end of the draft member to the coupler and holds the follower in Contact with the dwell.

The hooked free end of the draft mem-- ber 12 normally lies in front of an angular projection or keeper 1T best shown iu Fig. i1 on the discharged sign printing hammer 1,' (Fig. 2) and when the carrier is lifted by depressing the clearing key. the free end of theedraft member is lifted to a plane above the keeper 1T. As the coupler S and draft member 12 are drawn rearwardly by the actuator 10` the follower 1l on the draft member rides off of the dwelland down the adjacent cam face 1S on the head 0 of the carrier, under the influence of the spring 10, which brings the draft member iu line with the projection 1'4" on the sign printing` hammer` and as the coupler continues its rearward travel, the outer end. of the draft member 12, which is inclined to correspond with the adjacent beveled face` of the projection 17, rides up and over the projection until the hook or'draft member can snap This: engagement of the draft member and keeper over the keeper, as shown in Fig. 4.

takes place near the end of the forward stroke of the main drive shaft. ()n the return stroke of the main drive shaft, the actuator 10 on the resetting member 519, by its contact with the front wall of the shorter arm of the slot 9, advances the coupling toward its normal position, and the draft member carried by the coupling retracts the sign printing hammer 1 against the tension of its firing spring 5801. The sign printing hammer is recessed at 19, (Fig. 5) at a point opposite the hammer-resetting bail 509, to prevent the resettingban from cocking the sign printing hammer at every operation of the main drive shaft.

The return of the coupling member 8 and the draft member 12 to normal position, brings the'follower 14; on the draft member against the, cam face' 18 on the carrier, up which the follower rides to release the draft member from the keeper 17 on the sign printing hammer and tension the spring 16. A. latch of detainer 20 (Fig. 2) locks the sign printing hammer 1 in cocked oi' retracted position, (see Fig. 5) prior to the re-4 lease of the draft member, said latch being pivoted on the cross rod 504` independently of the individual hammer pawls 511. A spring 21 connects the latch with a link journaled at its upper end on the cross rod 5041, and a stop 23' on the link lies in the path of a shoulder 24 on the latch to limit the throw of the latter under the influence of the spring. .Asthe sign printing hamme-r- 1 reaches its set position, near the end of the return stroke of the main drive shaft, a lip 25 thereon rlides under the latch 20 which snaps over the lip to hold the?. hammer cocked, as in F 5. An abutment 507 otally connected at 28 to the link, and

dieser? (Fig. 2) limits they swingof the 1'nk in onedirection, to hold the latchA in position to .snap over the li on the sign printingl 'hammer'. lhen the animer is in its set position, it.,lies behindv the universal catch 518.

Obviously,'iby swinging the link 22 torwardly, the stop 23 will press against the `shoulder 2i of the latch 2O to li'lft the .latter and releasethe sign printing hammer to the action of its-drive spring 580g. An extensb ble trip lbar 27, one end or' which 1s pivthe y otherend of which carries a slotted exten'- y the extension at the inner` limit of its travel The slot 33 in the extension 29 is open at Y I .29 forwardly and tensions the spring 32 suf- I i operable independently of the regular printsion 29 embracing the trip rod 303, shifts vthe link to displace thelatch 20. Pins 30 on the extension enter elongated apertures 3l in the forward end of the trip bar 27 to enable the extension to shift relatively to the trip bar;, and a spring 32 connects the extension and trip bar to normally maintain one end to facilitate assembly and disassembly relatively to the trip bar.

The trip bar 303 on its advance', every operation-ot the machine, idly traverses the slot 33 until it reaches the outer end wall thereof, whereupon,vv it draws vthe extension ticiently to rock the link 22 and torce the stop 23 against the latch 20' to cause the latter to release the sign printing hammer for operation, providing the sign printingA hammer is 1n cocked position,

So 'far as explained, the clear sign would be printed on the first' stroke after a clearing operation, but I provide novel means ing mechanism, to prevent the operation of the sign printing hammer after it has been set, until the .first amount is entered in the machine, and then to enable the-clear sign to be printed with such first amount and as an incident to itsl introduction into the machine. V

Such means, in the present embodiment,

comprises a universal bar 34 (Figs. 1-4) carriedf-.by arms 35 Journaled onthe cross rod 301, the. bar conveniently extending across the extensions 3112L of the rear rack supporting arms 311. An arresting arm or lock 36 'projects rearwardly from the uniA llink 22 cannot yield to such tensionbecause ofthe opposition of the arresting arm 36, in its path.

Upon the introduction of an amount into the machine, and the advance of the main drive shaft on itsI forward stroke, the racks or drive members 310 advance, preparatoryT to turningr the' eoi'nters, and rock the extensions 311? (see Fig. 4e) upwardly, and

the extensions, or any cil them lift the universal bar 34. to displace the arresting arm 36 relativeliT to the abutment 37, gto there by freeA the trip link 22 tor. operation when trip bar' 303 near the end of its forward stroke. The.'

the spring 32 is tensioned by the trip link, on such forward throw, Will press the stop 23 against the shoulder of the latch 20 to displace the latter, and if lthe signV printing hammer is cocked, to release the hammerior operation.

. lreferahly, the sign printing hammer 1s released prior to the release of the universal catch :518, so that the latter will detain the sign printing hammer until all the print ing hammers are released, but this' is not a necessary feature of the invention, as the sign printing hammer may be arranged so as not tocontact the universal catch, or may be released after the catch has been lifted.

lf the trip link 22 lshould remain in its 'forward or tripped position, due to gravity,

for instance, the stop 23 might tend to prevent the latch 20 from becoming effective when the sign printing hammer is again cocked. To insure the return or the trip. link 23 to, and its retention in, normal position, (Fig. 2,) the lower rearedge of the arresting arm 36 is beveled, as at 39, so as to ride over the abutment l'37 on the return of the universal bar 34 with the extension 311a to normal position, to force the link 22 rearwardly until the abrupt face 38 contacts the abutment. The extent of the face-33 is such that it vwill 'release the abutment upon.- the elevation of the rear extensions- 311a when 'r-egi's'tering.,one in the accumulator, but not when the-extensions litt slightly onl idle strokes, at .which times the detente 221 arrest vthe advance of the. racks. I

In that style ot' machine typified by the 'well known 'Wales construction, the clearing' lio key 327 is released from 'adepressed position at the endv of the forward stroke and returns to normal position, as shown in Fig. 8. v i

Such release and return of 'the clearing key might permit the return of the coupler member 8 and the carrier 3, from their effective elevated positions to normal idle l positions, prior to the resetting; of the clear sign printing hammer 1, were 1t not that means is provided to retain the coupler Where adjusted duringr the return stroke of the main shaft.

Such retaining mean` (Figs. 1/435 8) includes draft links (515 pivotally connected t'o the corresponding arms of a pair of rocker levers 615, and having closed slots (315b embracing the trip rod' 303. The

rocker levers 615a are iXed to the cross shaft 508, on which is fastened a pair of lifting cranks,626, having studs 6541 adapted to contact shoulders 1812a on the depending stems 1812 pivoted to supporting sockets 1856 for the ribbon mechanism, no-t shown. The sockets 1856 are loosely seated in the frame parts of the machine.

Normally, the trip rod 303 lies at the rear ends 0f the slots 615b in the draft links as shown in Fig. 1, and during` its forward sweep, the trip rod travels idly in the slots until near the end of the stroke, whereupon, it contacts vthe front end walls of the slots t0 draw the draft links 615 forwardly and thereby roc-k the shaft 508 to raise the lifting cranks 626, as shown in Fig. v8.

The shoulders 1812n normally lie beyond, the paths of travel of the cranks, but the depression of the clearing key 327, turns thc utility cross shaft 1801 forwardly, as above explained, and withit a pair of guide arms 1813 haring slotted heads -18'13fL through which the stems 1812 pass.

Light springs 281 connect the guide arms 1813 and stems 1812, which springs are tensioned when the arms 1813 rock forwardly upon the depression of the clearing key, to shift the stems 1812 and position the shoulders 1812l above the studs st of the lifting cranks 626. I

With the parts`in adjusted position, the

l cross shaft 508, `when rotated by the trip rod 303 on its forward stroke, causes the cranks 626 to lift the stems 1812 and sockets 1856 to position a' different 'field ofthe rib- 'bon opposite the printing line, against the tension of comparatively strong restoring springs 1881 encircling 'the sockets 1856,

The sockets are maintained in this position, during the return stroke, by springimpellcd catches 616 pivoted on a cross rmi;

607 and adapted to snap over ears 615c on arms 615d ofthe rocking levers 615a when the latter have been actuated by the draft links 615 and trip rod 303 on their forward stroke.y v

The entrance of the catches 616 into the paths of. the ears 615c on the rocker levers is insured by swinging the rocker levers below the catches, as shown in F ig. 8, which illustrates the positions of the parts at the end of the forward stroke.

As the main drive shaft 200 returns, the trip rod 303 releases its pressure against the forward ends of the slotted draftlinks 615, which thereupon retract under the in- Aucncc of the springs 384 .to enable the levers 615d to rise until arrested bythe catches 616. Obviously, this slightly lowers the cranks 626 and the sockets 1856, but not sutliciently to permit the disconnection of the stems 1812 from the studs 654 on the rranks, on account of the pressure of the shoulders, 1812 against the studs 654 caused vby the strong springs 1881, which pressure` adjusted position, until the trip rod 303,

near the end of its return stroke, strikes the catchesand retires them to enable the rock-- ing levers 615a and the lifting cranks 626 to return to normal positions, under the iniuence of their springs 384.

The clearing key 327 restores to normal position at the end of the forward stroke ofl thev main drive shaft, thereby releasing the adjusting bar 326 and the utility shaft 1801 controlling the position of the coupler 8, to the action of the restoring spring 682, but owing to the lirm` contact of the shoulders 1812a with the lifting studs 65,4 on the cranks G26, caused by the strong springs 1881, the

weaker springs

682 and 281 for restoring the utility shaft and guide arms 1813, are unable to disengage the stems 1812 from the lifting, cranks, and the arms 1813 are prevented by such stems, from returning to normal position until the catches 616 are released, and thus lock the utility shaft 1801, which supports theI carrier 3 and coupler 8, where adjusted, until the sign printing ham. mer has been cocked.

The latches 616, when released, enable the

springs

682 and 281, aided by the weight of the parts, to restore the adjusting bar 326 and lower the carrier 3 so that the long arm of slot 9 is registered with the actuator 10 which, on succeeding strokes, idly traverses the slot.

A special key 3273*, (F ig. 1) similar to the clearing key 327, is provided for effecting the well known sub-totaling operation, and to prevent the cooking of the normally discharged sign printing hammer 1 during such operation, I provide the sub-total key with a wiper 352, adapted to ride along a cam face 326C formed on the adjusting bai- 326, which cam face isI more abrupt than the cam face 326'"L engaged bythe wiper on the clearing key 327.

Depression of the subtotal key 327a will, therefore, imparta longer-stroke to the adjusting bar and through the utility shaft 1801 and crank 2, will lift the carrier 3 to a position above that occupied when the clearing key is depressed.

The short arm of the slot 9 in the coupler 8 is preferably open at one end to accommodate this increased throw of the carrier and meest? The printing ofV the clear sign near the end of the forward stroke oi the main drive shaft 'takes place preliminary lto the registration of an amount in the accumulator, which occurs on the return stroke, and as an incident thereto.

lt may be desired to prevent the printing ot the clear sign when the tirst item is nonprinted, to accomplish which, l' provide a shifting arm 524 (Figs. l, 2, ,t and 7) projecting rearwardly from the usual llales' non-print bail 525i-a. Depression of the nonprint key 523 rocks the non-print bail 524ia and raises theshifting arm 51%b to contact the loiver end oi' a. locking slide '-lO having pin `and slot connections 1li, with a stationary part of the printer frame." The shift- Ang arm 524" forces the locking slide up`. Wardly until its upper end contacts with, or lies in'miediately below, the tail 5131 or' the clear sign typecarrier 513D, when the latter is in normal position. f y T he sign printing hammer l, `upon its release, drivesthe firing pinlv against the heel of the clear sign typecarrier 513", but the locking slide el() in the path of the tail 513 prevents the typecari'ier from striking against the platen so that no clear signal is printed, when the non-print key is depressed.

Furthermore, the clear sign printing hammer l upon its release, remains in discharged position so that no clear sign can be obtained 'with any subseouent printed amount in the same list of items. 1

Changes may be made in the form and arrangement or' the several pai-ts without departing from the spirit and scope ot' this invention.

vl/Vhat l claim is l. ln a calculating machine, he combination with accumulating, and regular print 'ing lmechanisms, includingprinting ham- -mers; of an auxiliary sign printing-device,

including a sign printing hammer; means to cock the sign printing hammer; a latch. to retain the sign printing hammer 'in cocked positiomnieans to trip the latch; and lockling means operable independently of the regular printing hammers and displaceable preliminary to the registration of the first amount on the accumulating mechanism, to prevent the release of the latch during idle strokes intervening between the clearingof the accumulating mechanism, and the introduction of the lirst amount into the machine.

2. ln a calculating machine, the combination with a keyboard; and accumulating, and regular printing mechanisms, including printinghammers, hammer latches, means to trip the latches, and means to reset thehammers; of van auxiliary sign printing device, including, a sign printing hammer;

means to releasably connect the sign print-` ing hammer directly with the regular hammer-resettingmeans, to cock the sign printing hammer; a latch to retain the sign printing hammer in cocked position; means sepa rate from the latch tripping means of thel and means operable as' an incident to `the p registration of the iii-st amount on the accu- .inulating mechanism, and separate from the regular'latch tripping means, to displace the lock.

, 3. In a calculating machine, the combina-A tion with accumulating, clearing, and regular printing mechanisms, the last including printing hammers; and a hammer-resetting member; of a sign printing mechanism, including a sign printing hammer; means operable coincidentally with the clearing of' the accumulator by the clearing mechanism, to enable the hammer-resetting member to cock the sign printing hammer; means to detain the sign printing hammer in cocked" position; means actuated at every Operation oi the main drive shaft, to trip the detailiing means; a lock to prevent the release of the detaining means; and means operable prior to the actual registration of'an amount on the accuniulatorkto Vdisplace the lock.

si. ln a. calculating machine, the combination with accun'iulating, clearing, lar printing mechanisms, the last including printing hammers, and means to reset the same; of an auxiliary sign printingdevice, including" a sign printing hammer; means operable incidentally with the Zeroizing ol the accuiiiulators by the clearing mechanism, to enable the hammer-resetting mechanismV 'to cock'the sign printing hammer; a latch' independent ,of the regular printing hammers, to retain the sign printing hammer in cocked position; means actuated at every operation of the iiiaChine, to trip the latch: and locking means releasable independently of the printing hammers and disabled preliminary to the registration of an amount in the accumulator, to'preve'nt the release of the latch.

5. ln a calculating machine, the combination with accumulating, clearing, and regular printing mechanisms, the last including printing hammers; and a hammer-resetting member; of a sign printing mechanism, in`

cluding a sign printing hammer; means operable coincidentally with the clearing of the accumulator by the clearingimechanism, to enable the hammer-resetting -member to cock the. sign printing hammer; means to disable the last' named ineaiis uponthe retractionof the sign printinghaminer; means to detain the sign printing hamiiiei in cocked position; means actuated .at every operation of the main drive shaft, to trip the detaining means; a lock to prevent the release of and regusol actual registration of an'amount on the accumulator, to normally prevent the release et the hainmer-detaining means, during idle strokes intervening between the cocking of the sign printing hammer, and the introduction of an amount into the-machine.

7. In a calculating machine, the combination with accumulating, clearing, and regular p rinting mechanisms, the last including printing hammers; of an auxiliary, sign printing mechanism, including a sign printin g hammer; means to cock the sign printing hammer; detaining means to hold lthe sign printing hammer in cocked position; means to trip the liammer-detaining means; and means operable independently orl the printing hammers and, displaced preliminary to the actual registration ot the,` first amount on the z tccumulator, to normally prevent the release of the hamiiie-r-detaining means, during the idle strokes intervening between the cocking of* the hammer, and the introduction of an amount into the machine.

til

pl the resilient means;

8. In a calculating machine, the combination with a main drive sha-tt; and accumulating, clearing, and regular printing mechanism's, the last including printing hammers, and resetting means therefor; of an auxiliary, sign. printing mechanism, including a sign printing hammer; means to enable thel regular hammer resetting' means to directly cock the sign printing hammer; detaining means to hold the sign printing hammer in cocked position; a trip link connected to `and adapted to disable the detainin g means;

operation ot the main drive shaft, to operate the a. resilient member actuated at each trip link, and release thedetaining means; a displaceable lock to prevent effective actuation oi' the trip link and cause an extension` and means to displace the lock.

il. .ln a calrulatingiiiachiiie, the conibiiiation with a main drive sha lt: and accumulat ing, clearing, and regular printing mechanisms, the last including printii'ig hammers, and resetting' means therefor; o'l' an auxiliary. sign printing' mechanism. including a sign printing hammer; means to enable the regular hammer resetting means to directly cock the sign printing hammer; detaining means to hold the sign printing hammer in cocked position; a trip link adapted to disable the detaining' means; a trip rod actuated at each operation of the main drive shaft; and a fiexible bai.' to connect the link and trip rod, to cause the link to trip the detaining' means and free the lsign printing' hammer.

v l0. In a calculating machine, the combination with accun'iulating, clearing, and regular printing mechanisms, the last including printing hammers; of an auxiliary, sign printing mechanism, including a. sign printing hammer; means to cock the sign printing hammer detaining means to hold the sign printing hammer in cocked position; a trip link to-disable the detaining means; a shiftable trip rod; a bar connected to the link and having an extension loosely connected to the trip rod; and av spring to connectthe bar and extension.

ll. In a calculating machine, the combination with accumulating, clearing, and regular printing mechanisms, the last including' printing hammers; of an auxiliary, sign printing mechanism, including asign printing hammer; means to cock the sign printing hammer; detaining means to hold the sign printing hammer in cocked position; a trip member to disable the detaining means; an extensible bar connected to the trip member; means to normally retract the extensible bar; and a shiftable trip rod adapted to extend the bar to tension the retracting means to operate the trip member.`

12. ln acalculating machine, the combination with accumulating, clearing, and regular printing mechanisms, the last ineludii'ig printing hammers; of an auxiliary, sign printing mechanism, including a sign printn ing haniiner; means to cock the sign printing hammer; vdetaining means to' hold the sign printing hammer in cocked position; a trip member to disable the detaining means; a bar connected to the trip member and having an extension.slidably mounted thereon; a spring to hold the extension retracted;

and a shit'table trip rod to advance the extension and tension the spring to operate the trip member. i

13. In a calculating machine, the combination with accumulating, clearing, and regulai printing i'iiechanisiiis, the latter including printing hammers, and latches to retain the regular printing hammers in set position; oi. an auxiliaryLsign printing device, including ,a sign' printing hammer; means controlled by the clearing mecha.- nism, to cock'the sign printing' hammer; a latch to retain the sign printing lian'imer in cocked position; means to trip the latch to release the hammer for operation; and locking means tor the sign printing hammer Y,

latclr separate trom the regular printing -dentally,

' for;

mechanism, to resist t-he latch-tripping means, and itself displaceable as an incident to the operation .of the accumulating mechanism.

4141. In a calculating machine, nation with accumulating, clearing, and regular printing,mechanisms, the last including printing hammers; of an auxiliary, sign printing device, including a sign printing hammer; means to cock the sign printing hammer; a latch individual to the sign printing hammer to retain the latter in cocked position; means to trip the latch; and locking means for the latch, operable independently of the regular printing mechanism, and automatically displaceable inciand as a necessary preliminary, to the entry of an item on the accun'iulator after a clearing operation.

15, In a calculating machine, the combination with an accumulator, including a series ,of counters, and drive meinbersthereand a printer mechanism, including' hammers, and a hammerof an auxiliary, sign including a sign printregular printing resetting member printing mechanism,

ing hai'iiiner; adjustable ycoupling mechaiiisni between the sign printing hammer and the hamnier-resetting member to enable the latter to cock the sign printing hammer; a latch to detain the sign printing hammer iii cocked position; means to trip the latch, andv means directly controlled from the accun'iulator drive members to normally lock the latch against release until the entry of ltlie first amount intofthe machine.

16. In a calculating machine, the combination with an accumulator including a series of ounters, drive members therefor; sliiftable supports for the drive members, having extensions; and a printer mecha- =isni, including regular printing hammers, and a liammer-resetting member ;of an auxiliary, sign printing mechanism; including a sign printing han'inier, adjustable means to couple the resetting member and sign printing hammer, to cock the latter; a latch to detain the sign printing' hammer in cocked position; means to trip the latch; a universal bar operable by any of the drive ineiiibei suppoiting extensions; controlled thereby and normally lying in the path of the latch-tripping meansV to prevent the' release of the latch.

the combichine, to normally hold lthe latch against release.

1S. In a sign printing mechanismI for calculating machines, the combination with the latch upon the entry-of and alock 17. In a calculating machine, the combination 'with an accumulator; including a series of counters, drive members therefor;

means to control theengageiiient and disl the sign printing hammer iii cocked posiarm of the slot; means regular printing hammers, andthe hammer-resetting member; of a sign, printing haiiin'ier; a coupling mechanism between-'the I resetting Vinemsign printing hammer and ber, including an adjustable support;a ceupler shiftab'ly mounted von -lthe support;

means to' adjust the coupler andy support relatively to the resetting member to connect the coupler andv the haiii'mer-resetting member; a draft member carried by the coupler and shifted thereby to engage vthe sign printing hammer; a member; a cam on-.ivhich the follower rides to disconnect the draft member and sign printing hammer When the latter'is cocked; a latch to retainhthe sign printing hammer in cocked position; and means to tri'p the an amount into the machine.

19. In a calculating machine, the combination With accumulating, clearing and regular printing mechanisms, the last including printing hammers, and a hammerresetting finember; of an auxiliary, sign printing device, including a sign printing to couple the resetting member and the sign printing hammer, as an -incident to' a clearing operation, comprising an actuator carried by the hammer-resetting member; a normally inoperative coupler adjustable relatively to the actuator and controlled by the clearing mechanism; a draft member on the coupler to releasably engage the sign printing hammer and shift it to cocked position; means-to detain the sign printing hammer in cocked position; means to trip the detaining means; andl means to prevent the release of the detaining means until the first item is being entered in the machine. f

` '20. In. a calculating machine, the coinbiiiation with a printer section having printing hamiiiei's,'aiid hammer-resetting means of an auxiliary, sign printing mechanism, including a sign printing hammer having a; lug, thereon; an actuator on the hammer-resetting means; an adjustable support; a coupler shiftable relatively to the lsupport and having an angular slot; the actuator adapted to idly traverse one arm of the slot and normally lying in register 4 to' shift the support to canse the last named arm of the slot to embrace the actuator; a draft member pivoted to the coupler, and having a hook adaptfollower on the draft' with the remaining ed to engage the lug on the sign printing hammer, to enable the actuator to shift the sign printing hammer to cocked position; a latch to hold the sign printing hammer in cocked position; a follower on the draft member;- a' cam wiped by the follower as the sign printing hammer cocked tg release the draft member from said hammer; and means to trip the latchupon the entry of an amount into the machine.

21.111 a calculating machine; the combination with a main drive shaft; an accumulator; clearing mechanism therefor; and a regular printing mechanism,- including hammers, and a hammer-resetting.member; of an auxiliary sign printing mechanism automatically operable independently ofthe regular printing mechanism, including aj sign printing hammer; adjustable means to temporarily couple the sign `printing hammer and the regular han'imer-resetting member, to cock the sign printing hammer; means to disengage the sign printing hammer from the hammer-resetting member as f the hammer reaches its cocked position ;l

y means releasable independently of the regular printing mechanism, to detain the hammer in cocked position; means operable on each operation of the main drive shaft to trip the detaining means; and means displaceable only as a necessary preliminary to the entry of the first amount in the accumulators to normally lock the hammer-de'- taining means against release.

2Q. In a sign printing mechanism for cal.- culating machines, the combination with the regular printing hammers; and the hammerresetting member; of a signprinting hamn'1er;'an adjustable coupling mechanism between the sign printing hammer and the resetting member; including al shiftable coupler; means to adjust the coupling mechanism to connect the coupler and the hammerresetting member; a draft member carried by the coupler and shiftable therewith to engage the sign printing hammer and retract it to cocked position; means to disable the draft member; means to detain the sign printing hammer in cocked position; and means to trip the detaining means upon the entry of an amount into the machine.

23. In a calculating machine, the conibination with a main drive shaft; and accumulating. printing and clearing mechanisms; of an auxiliary sign printing mechanism, including a sign printing hammer; means to cock the hammer preliminary to the printing of the first item after a clearing operation; means releasable independently of the regular printing mechanism to detain the signv printing hannner cocked; means tending to trip the hammer-detaining means at each operation of the main drive shaft; and locking means automatically displaceable as a necessary preliminarv to the entrv of an amount on the accumulator to prevent the tripping of the detaining means, dgring idle strokes intervening between the cocking of the hammer and the introduction of an item into the machine.

24,In a calculating machine, the combinatioirwith accumulating mechanism; of an auxiliary, vsign printing mechanism, including a sign printing hammer; means to cock the sign printing hammer; detaining means to hold the sign printing hammer in cocked position;'a trip rod sliiftable at each operation of the machine; a trip member to disable the detaiiiing means; a 'spring connection between the trip member and trip rod; and locking -means for the trip member displaceable as a preliminary to the registration of an amount on the accumulating mechanism. 25. In a calculating machine, the combination with accumulating, and regular printing mechanisms; of an auxiliary sign printing mechanism, including sign printingihainmer; means to cock the sign print-v ing hammer; detaining means individual to the sign printing hammer to hold the latter in cocked position; yielding means tensioned at each operation of the machine to trip the detaining means; and locking means displaceable as a preliminary tothe registrationof an amount on the accui'nulating mechanism, to prevent the .tripping of the detaining means during idle strokes interif'enin'g between the cockin-g of the hammer and the introduction of an item into the machine. i 26. In a calculating machine, the combination with an accumulator; clearing mech? anism therefor; a regular printing mechanism, and means to prevent the printing of amounts registered on the accumulator; of an auxiliary sign printing` mechanism autoinatically operable independently of the regular printing mechanism to print a clear sign to indicate the factthat the accumulator was clear when the iirst amount was registered after a clearing operation: and a lock operable by the nonprint mea/ns to prevent the eifective operaticn of the sign printing mechanism. l 27. In -a calculatingmachi/nmthe combination with an accumulator.:.,clearing mechanism therefor; a regular'printing mechanisin,` including hammers,A and a hammerresetting member; and means to prevent the pi'inting of amounts registered on the accumulator; of an auxiliary, sign printingl mechanism automatically operable independently of the regular printingmechanism, including a signl printing' hammer; means to cock the sign printing hammer; la latch to detain the sign printing hammer in corked position; means to trip the latch;

. tei' maaar? in the accumulator to release the latch to the action of its trip means; anda locking bar adjusted by the non-print means to revent ,the printing of the sign upon the re ease ot' the latch. k

Q8. In a calculating machine, the combination With accumulating, and regular printing mechanism, the latter including .printing anism; ot anauxiliary sign printing device, including a sign printing haminer;'means to cock the sign printing hammer; a latch to retain the sign printing hammer in cocked position; -means to trip the latch; a shittable sign typecarrier actuated bythe sign printing hammer; and a locking bar adjustable by the non-print mechanism into' the path ot the carrier to prevent vsign printing.

Q9..In a calculating machine, the combination with accumulating mechanism; and regular printing mechanism, `including printing hammers; of an auxiliary sign printing device, including a sign printing hammer; an actuator to reset the sign printing hammer; a coupler mechanism to connect the actuator and sign printing hammer to cock the latter and clearing and subtotal keys to .variously adjust the coupler mechanism relatively to the actuator.v

30. ln a calculating machine, the combination with accumulating mechanism; and regular printing mechanism, including printing hammers; of an auxiliary sign printing dcvice, including al sign printing hammer; an actuator to resetthe sign printing hammer; coupler mechanism to connect the actuator and sign printing hammer, to cock the lata clearingl key to adjust 'thecoupler mechanism relatively to the actuator, for eii'ective operation; andv a sub-total keyto' disable the coupler mechanism relatively to Athe actuator.

31. ln a calculating machine, the combination with accumulating mechanism; and regular. panting mechanism, including printing hammers; of an auxiliary sign printing device, includinga sign printing hammer adjustable means to cock the sign printing hammer; and clearing and subtotal keys to variously .adjust the cooking means for eiiective and non-effective operation. v

32. In a calculating machine, the combination with accumulating and regularprinting mechanisms; of an auxiliary sign printing device, including a sign printing hainmer; means to cock the sign printing ham-, mer; normally idle, coupler mechanism adjustable to connect the hammer and hammer-resetting means, a key to adjust the coupler mechanism and another key to adjust the coupler mechanism to ineffective position relatively to the hammer-cocking means.

of a sign printing' hammers; and a non-print mechalto temporarily-hold the key.

registration 'of an printing printing for eiiective operation;

nation With accumulating and regular printingnieclianisnis, the latter including printing hammers, andhammer-resetting means; device, including a sign printing hammer; Anormally idle coupler mechansm. adjustable to directly connect the sign printing hammer and the regular hammer-resetting means; ableA independently anism, to retain the sign printing hammer inv cocked position.; a key and mechanism operdetaining `means opeij of the coupler mechated thereby, to adjust the coupler mechaiiisni for 'effectivel operation; Vlocking means Where shifted;

means 1 to retain the coupler mechanism Where adjusted', su'bsequentlyto the release of the-key,said means adapted torbe 'auto-F matically disabled, of the coupler mechanism to-,i'dle position, after the sign4 printing hammer-detaining means becomes effective; and means to trip' the 'sign printing hammer-detaining means.

'34. In a calculating machine, the combination With accumulating and regular print-` ing hammers, and hammer-resetting'means; or' a sign printing device, including a normally discharged sign printing hammer; normally idle-coupler mechanism adjustable to directlyv connect the sign printing hammer `and "the regular hammer-resetting means; a latch operable independently ot' the coupler mechanism, to retain the fsign printing hammer in cocked position; said coupler mechanism adapted .to restore to idle position after the latch becomes eHective; and means operable preliminary to the amount onthe accumulating mechanism to disable the latclr andI Jree the sign printing hammer for operation.

35. ln a calculating machine, the combi-l nation with accumulating mechanism; and regular printing mechanism, including hammers; of an auxiliary sign device, including a sign printing hammer; an actuator to cock the sign printing 'hammer;an adjustable coupler mechanism having an angular slot, the actuator normally idly traversingone arm of the slot; and meansto adjust the coupler mechanism to cause another ar'm of the slot to embrace thev actuator.

36. Ina calculating machine,

regular printing mechanism; of an auxiliary sign printing device, including a sign print- V ing hammer; an actuator to reset the bami,

Anier; coupler mechanisn'i between the actuto permit-the restoration"v I ist ing mechanisms, the latter including printilove vregular printing mechanism; of an auxiliary sign printing device, including a sign printing hammer; an actuator to reset the hammer; coupler inechanisn'i between the actuator and hammer, having an angular slot, the actuator normally idly traversing one arm of the slot; means to adjust the' coupler mechanism to cause another arm ot' the slot to embrace the actuator; means to hold the coupler mechanism where adjusted; and a sub-total key to displace the coupler mechanism relatively to theactuator.

38. In a calculating machine, the coinbination vvith a keyboard; and accun'iu'lating, and regular printing mechanisms, in-

cluding printing hammers; or an auxiliary 4sign printing device, including a sign printing hammer; means to cock the sign printing hammer; a latch to retain the sign printing hammer in cocked position; means to trip thelatch; and lockingnieans operable independently of the regular printing hammers and controlled by the keyboard, said locking. means being displaceable pre- "ii'i..in'aiy to the registration of the first amount on the accumulating mechanism, to pr ,vent the release of the latch during idle strokes intervening between the clearing of the :accumulating i'nechanism, and the intro- 'lliction off the first amount into the yniachinen Y '39 Tn a calculating machine, the combination with a main drive shat't; and accumulating, clearing, and regular printing 'mechanisms the last including printing hammers, latches tl'ieijet'or, and lhamiiiei' re- -setting i'i'ieans; or' an auxiliary, sign printing mechanism; including a sign printing hammer; coupling means controlled by the clearing meclianisn'i, to enable the hammer resetting means to cock the sign printing hanimer: detaining means individual to the. sign printing hammer, to retain the latterv co ked; and means to release the detaining i'l'lieans, indel'iendcntly olf the regular printing'mechanism, as an ii'icident to the entry ofthe first item into the machine, after a clearing operation. I

40. In a calculating machine. the com-l bination with a main drive sha'l't; and accumulating, clearing, and regular printing inecliai'iisms, the last including printing hai'iiuiers, latches therefor, and hammer i'esetting means; ol an auxiliary. sign printing ii'ieclianisin; including a sign printing hammer; coupling means controlled by the clearing mechanism, to'enablel the hammer resetting means to cock the sign printing hammer; detaining means individual to the sign In'inting' hammer, to retain the latter cocked; a displaceable lock toprevent tripping of the detaining means during idle means actuated at each operation of the main drive shaft, to trip the detaining means after the displacei'nent ot the lock.

4l, In a calculating machine, the combination with a main drive shaft; and accumulating and regular printing mechanisnis; the latter including printing hammers, and hainnicr-resetting means; of a sign printing hammer settable by the regular resettiiig means; a detainer to hold the sign printing hainnier cocked; yielding` means tensioned at each operation of the main drive shaft, to trip the detainer; a displaceable lock normally in the path ot a part of the yielding trip means to arrest the latter and thereby prevent the tripping oic the detainer; and means to displace thelock.

42. ln a calculating machine, the conibination with a main drive shaft; and accumulating, clearing and regular printing n'iechanisms, the last including priiitii'ig hammers, latches therefor, and hannnei' resetting means; ot an auxiliary, sign printingii'iecl'ianisn'i, including a normally discharged sign printing hammer; normally idle coupling means controlled by the clearing mechanism, to enable the hammer resetting means tocock the sign printing hammer; detainiiig means to retain the sign printing hammer cocked; disconnecting means engaged by the coupling n'i'eans during the cocki-ng ot' the hammer to release the coupling means from the hanii'ner resetting means; yieldable means actuated at each operation oit'the main drive shaft, to trip the detaining means; and a lock disliilaceal'ile' indeliendently of the regular printing mecha.- nism to prevent the tripping ot the detaining means.

43. In a calculating machine, the combination with 'a main driveI shaft; and accumulating. clearing and regular printing i'nechanisms, the last including printing han'imers, latches therefor, and hammer re.- setting means; ot an auxiliary, sign printing mechanism, including a nori'nally discharged sign printing hammer; nori'nally idle coupling means controlled by the clearing incchanisni, to enable the han'mier resetting means to cock the sign printing hammer; detaining means to retain the sign printing haimnei' cocked; means ei'ig'aged by the coupling means duringythe cocking o'l the han'nnei to release the coupling means from the hammer resetting means; i'neans to Atrip the detaining means; and 'a lock displzuxaible independently of tl'iefregular printing hammers, to prevent the tripping ot the detaining means.

ARTHUR PENTEcosT.

disconnecting llO