US1099725A - Computing attachment for type-writers. - Google Patents

Description

EST AVAILABLE C A. P. SMITH.

COMPUTING ATTACHMENT FOR TYPE WRITERS.

APPLICATION FILED MAY 6, 1913,

1,099,725. Patented June 9,1914,

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WITNESSES T VAILABLE cop APPLICATION FILED MAY 6, 1913.

I Patented June 9, 1914.

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COMPUTING ATTACHMENT FOR TYPE WRITERS.

APPLICATION, TILED MAYG, 1913.

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A. P, SMITH.

COMPUTING ATTACHMENT FOR TYPE WRITERS.

APPLICATION FILED MAY 6, 1913.

1,099,725. Patented June 9,1914. I

4 SHEETSSHEET 4.

7 ZMMQQ ALFRED F. SMITH, 0F INGOMAR, PEN'NSYLVANIA.

COMPUTING ATTACHMENT FOR TYPEWRITERS.

Specification of Letters Patent.

Patented June 9, 1914.

. Application file d May 6, 1913. Serial No. 765,794.

keys, etc., and is designed to provide a mechanism of this character of simple, accurate and efficient construction which will automatically and successively compute the several amounts printed, giving final-results,

either in addition or subtraction, successively for each operation and for the final result by a visible indicator.

My invention embodies nrprovements, in

-a calculating or computing machine, particularly adapted to embodiment in a type writer. in providing a right hand and left hand totalerj novel means for actuating a series or bank of indicating wheels through an internal'shifting master pinion, means mechanism in elevation.

for transmitting rotating movement to the master wheel through a slotted sleeve, rack and pinion mechanism for said sleeve, shifting gear mechanism for eifecting engagement and disengagement between the rack and pinion mechanismlost motion gearing between the actuating lever key of the machine and the rack and pinion mechanism, clutch mechanism dependent on the motion of the typewriter carriage for connecting and disconnecting the transmission shaft of the rack actuating gearing, locking and unlocking mechanism for the actuating key segmental gears, together with the several features of improvement and construction as more fully hereinafter set forth and claimed.

In the drawings illustrating the invention, Figure 1 is a 'view of the typewriting machine provided with myimprovement, in front elevation. Fig. 2 is a plan view of a portion of the machine, showing the attachment. Fig. 3 is an enlarged sectional view, showing indicating disks and the operating Fig.4 is a vertical sectional view through the indicating disks,.illustrating the arrangement of the longitudinal adjustable positioning shaft for the actuating master pinion, the section being taken on the line IV. of Fig. 5. Fig. 4 is a detail view showing the spring retracted gear shafts. Fig. 5 is a cross sectional view taken on the line V. V. of Fig. 3. Fig. 6 is a plan view in detail, showing a portion of the actuating mechanism by which movement is imparted to the rack bar operative mechanism. Fig. 7 is a detail view in elevation, illustrating the clutch mechanism, etc. Fig. 8 is a cross sectional view taken on the line VIII. VIII. of Fig. 3. Fig. 9 is a detail'cross sectional view, showing two of the co-acting pinions. Fig. 10 is a detail view, showing the arresting device. Fig. 11 is a-perspective detail view showing the actuating arm for the rack bar mounted on the marginal stop of the scale controlling the operation of the master pinion for either addition or subtraction. Fig.

15 is a perspective detail view, showing the clutch operating lever mechanism. Fig. 16

is adetail view showing the cam controlling locking mechanism for the segmental gears and the rack shaft. Fig. 17 is a similar view showing one of the rack bars and its actuating gear. Fig. 18 is a similar view showing one of the key-actuated gears depressed and the relative position of its coacting gear, in lost motion position. Fig.

19 is a detail view showing a duplicate cam' actuating arm.

The indicating mechanism for giving the results, either in addition or subtraction. comprises a group of indicating or totaling wheels a and 6 arranged at each side of the central portion of the machine within a surrounding partly cylindrical casing 2, having a corresponding series of sight apertures 3 for exposing the particular numeral of each wheel a, or b t-o-view, as it is actuated in connection with .the operating mechanism, the several wheels of each series being revolubly mounted within intervening stationary housing rings 4, fixedly located and'connected with the casing by any suitable. items, as rods 5 (Figs. 3 and 4).

It will be understood that either group or series of wheels (1. or b is independent of the other, and is. operative independently or alone, by its particular actuating rack, hereinafter described, dependent on individual clutch mechanism, which is controlled by selective adjustable cam actuating devices chine.

and Z), corresponding to the decimal pointposition, and unprovided with indicating.

carried by the scale bar or a marginal stop thereon, and adapted to cooperate with the Ordinary set of type bars of a standard ma- Inoperative or dead wheels anumerals, comprise an idler. element of each series. Each of said wheels (1 and -b is provided with a laterally ofi'-set portion 6 providing annular space for interposing a projecting tooth 7 or teeth, in the case of the unit wheel, adapted/to actuate the particular one of a corresponding series of toothed idler wheels 8, loosely mounted on shaft 9, and adapted to intermittently transmit movement from one wheel to the other to ac complish accumulation ofthe adding or subtractin process, in the well-known manner of mec anism of this type and which wtll be readily understood without further de scription, it being understood that the num ber ofthe wheels, 'the arrangement of the indicating numerals, etc., is such as to effectthe maximum capacity of the invention within any desired limits. In the construction illustrated, the machine has a capacity to the extent of 9,999,999.99. Each of the wheels a and I) is provided with an inner peripheral series of pinion teeth 10, registering longitudinally throughout the entire series, the endmost indicating wheels abutting against stationary terminal, non-acting wheels 11, 11, ateach end, said wheels being located within and against the endmost walls 12, 12, forming portions of the framework and easing.

For the purpose of actuating the wheels a and bone at a time, I provide a longitudinally adjustable master pinion 13 which is mounted upon arotatable sleeve 14 having transverse slots 15, 15, through each opposite side, with which sleeve the-master pinion 13 is rotatably connected by means of a transverse pin. 16, said pin extending also terminal 17 is connected with the shifting shaft 18,.at each end by means of a" ball joint 21, 'so constructed as to permit of free turning of the terminal 17 independent of the shaft and to provide for longitudinal movement of the terminal and master wheel- 13 in either direction, by said shaft. The slotted sleeve 14 is rotatably mounted at each end in the casing frame 12, as shown, and each'sleeve is provided at its inner end with an actuating pinion 22, secured upon the sleeve in any suitable-manner, as bya key 23. Thus, each sleeve and its longitudinally adjustable master wheel when located in register with the particular indicatin wheel which corresponds with the particu ar numerical column being printed on the typewriter, is designed to be actuated through itspinion 22 and the rack and gearing which are thrown into operativeengagement by its particular clutch mechanism under control of the particular actuating arm and cam employed, mounted on the marginal stop and scale bar. v

For the purpose of rotating sleeve 14 and master pinion 13 in one direction or the other, as desired, the mechanism illustrated in the drawings, and articula'rly in Figs. 12, 13 and 14, is providied, whereby to actuate the sleeve 14 to the desired extent, as suming the master wheel in engagement with one of the several indicating wheels a or 2), dependent upon the carriage control shifting mechanism, hereinafter described, and which transmits its motion through pinion 19 to shifting shaft 18. Each pinion 22- is designed to be rotated in one direction or 90 the other through either intermeshin pinion 24 or 25 carried on a stud 26 exten ing inwardly from a rocking bracket'arm 27 which is pivotally hung around the outer end portion of each sleeve 14, as indicated at 27 (Fig. 4) between the casing wall 12 and pinion 22, at each side of the center of the machine, one such bracket with its pinions being provided for each pinion 22. Each of. the pinions 24 and 25 is provided with a companion pinion 24and 25 respectively, also rotatably mounted on studs 26 and normally pressed into holding engagement with its companion pinion 24 and 25 respectively by a coiled spring 28. The inner contacting g faces of companion pinions 24-24 and 2525 are provided with series of ratchet teeth 29, operable to interengage and impart motion from one companion pinion to the other in one direction, but allowing pin-' ion 24 or 25 to rotate in reversed direction without imparting movement to its companion pinion 24 or 25, by riding over the wheels and being pressed backwardly thereby, compressing springs 28.-

For the purpose of positively"actuating either pair of wheels 24 24 or.-25.25 upon downward motion of the particular key lever C of the machine whichoperates to print the particular. numeral appropriate 12b for the particular operatiom as in the ordinary functioning of the typewriter'itself,-

I provide the double sided rack bar 30'which is vertically and slidably mounted in a supporting guide or bracket 31, extending outwardly from the inner' face of easing '2, which rack bar is bifurcated'at'filith upper, end, as sliown,'providing the terminial members 82,- 33, each'of which is provided across its outer'edge with a series of rack, teeth 34,

35, adapted to intermesh with the teeth of pinion 24' or 25, depending upon which pinion is thrown into mesh, for imparting rotation to sleeve 14 in the desired direction (Figs. 5, 12, 13, and 14). For the purpose of properly bringing one pinion or the other, 24 or 25, into operative meshing engagement with rack teeth 34 or 35, dependent upon whether addition or subtraction is being performed; or for throwing each pinion 24 and 25 at the same time out of engagement with either set of rack teeth 34 or 35 for inoperation, the bracket 27 is provided with a central depending lug extension 36 which is engaged by the clevis terminal 37 of a controlling lever 38 pivoted on supporting shaft or stud 39, extending downwardly through a slot 40 in the front casing 52 and provided with a finger terminal 41. This device is adapted to be set in either the upper position (Fig. 5) for addition, or in the lower position (Fig. 14) for subtraction, or in the intermediate position (Fig. 13) for inoperative positioning of the pinions 24 and 25. As shown in Fig. 1, these three positions are indicated bv the denominating letters A, D and S. Vhen lever 38 is thrown to the raised position, as in Figs. 5

" from engagement with rack teeth 34 and and 12, the terminal 36 of bracket 27 is thr wn inwardly, throwing pinion 24 away teeth.34 and and when the lever 38 is thrown into the lowered position (Fig. 14),

pinion 24 is brought into interme'shing engagement with rack teeth 34, and pinion 25 is still maintained out of engagement with teeth 35. If, therefore, the rack bar 30 is lowered when pinion 25 engages rack teeth 35, as in Figs. 5 and 12,"pinions 25' and 25 will be rotated in the direction of the arrow, and will impart motion to pinion 22 in the direction of its arrow, rotating the sleeve 14 and master pinion 13 to an extent dependent upon the downward travel of rack bar 30. It is, therefore, desirable that the rack bar shall be actuated only sufliciently far, for each key lever manipulation, to rotate the master wheel 13 to an extent corresponding to the movement necessary to bring the proper numeral into view, in conformity with the standard uniform printing action of the type bar and type, the movement of all of which is the same.

, For the purpose of actuating the rack bar 30, it is provided with a series of rack teeth 42 in meshing engagement wit-h a segmental pinion 43, which is loosely mounted by its ub upon shaft 44 extending across the lower portion of the casing and adapted to be intermittently partially rotated for each operation, when the computator mechanism For the purpose of actuating shaft 44 only sufliciently, more or less, to effect the desired downward movement to rack bar 30, each particular operating key lever O is provided with a connecting rod 45 which-in turn is connected with a segmental pinion 46 adapted to actuate a coacting mutilated pinion wheel 47 secured on shaft 44, (Fig. 8) a pair of wheels 46-47 being provided for each particular lever, there being ten in all of such, as shown, five at one side and five at the other, corresponding in number to the decimal number of the numerals comprising the complete set ordinarily used, the wheel 4'7 being omitted for the zero key. Each particular segmental gear 46 and 47 is mounted upon its pivoting shaft 48 and 44 respectively and is provided with a hub 49 having a clearance slot 50 for lost motion engagement with a pin 51 extending out wardly from shaft 48, whereby any particular segmental gear 46 or 47, when lowered, will partially rotate shafts 48 and 44, butwithout imparting movement to any other ofthe segmental gears 46 or 47. Shafts 48 and 44 are normally retracted by any suitable spring device, as springs 48, 44", engag-" ing arms48 44, secured to the shafts, as in Fig. 4 or by other suitable means.

The purpose of the. lost motion mounting of gears 4647 on shafts 4844 is to primarily effect movement of the particular gear 46 acted upon, and its companion gear 47, and to at the same time actuate shaft 48 to effect locking of all of the other gears 46 and their connected parts, by means of a latch 52 adapted to be lowered into a suitable locking notch 53 in the upper edge portion of each gear 46, as shown (Fig. 16.) For the purpose of lowering the latches 52 downward into said notches, a cam 54 is mounted on shaft 48 and actuatesa bell crank lever 55- pivoted at 56, the other end of the lever engaging underneath one of the latches 52 by a pin or lip 57 thereon, thereby throwing all of the latches upwardly on their pivoted mounting stem 58 when the cam 54 is inoperative, and allowing the latches to fall into notches 53 when the lever is thrown down by the cam. The cam 54 is so constructed as to maintain bell crank lever 55 in thrust out positionuntil the end of the-operation, locking all of the gears 46 by the latches 5 2, nothat only the particular gear being used is free to move. It will be understood that at the commencement of v the operation, the actuated gear 46 moves past the point of latch .52 slightly before cam 54 actuates the lever to allow the latches to make locking engagement with the re- 5 maining gears. At the same time that cam 54 operates lever 55, a locking bar 59 pivoted at 60 is thrust downwardly between the teeth of rack shaft 18 by a connecting rod 61, positively holding the rack shaft .in

locked position during. the printing operation, and preventing its movement until the. termination thereof.

It will be observed that the teeth of each particular gear 46' and 47 are limited in number to the desired extent of movement' of'gear 47, and these gears are so constructed as to prevent further movement of gear 47 during the continued further movement of gear 46 to the full extent of the uniform limit of the stroke of each particular-key 25. the ast operative tooth, as indicated at 62,

. conforming to the outer radius of ear 46,

wherebysaid gear will slide past t 1e gear '47 without affecting it on further downward ..movement, an'dwillengage its teeth on the reverse movement'to reestablish the-normal position (Figs 8 and 18). The dpositioning of the master wheel l3 longitu 'nall'y and with relation to the particular indicating wheel a or bto be'actuated depends pri- -3'5 marily on the travel of the carriage within .a certain predetermined distance, during which it is desired to print the number, as in'a column of figures. Adjustably mount- .ed .on the scale bar of the carriage, or on 40 any other convenient portion thereof, is a suitable movablesupport, as the marginal stop 64 adapted to be set-in any desire'd'position longitudinally of the scale bar, as will be readily understood, and with the usual indicating pointer 6 5 for locating it with relation to the indicating pointer 65 for locating itflwith'relation to the indicating scale of the bar.

.-.: i-gina'l stop 64.is provided with D dovetailed recess 66 between its endmost portions, into which recess is set the upper end of actuating arm. 67 .which extends downwardly inYfront-of the track bar t be V hind-the ca ingd the computing mechanism 5--above described. The arm 67 is provided g-with a terminal':68 adapted-to engage the shouldered terminal 69 0f a latch 70 which is ivotally-mounted in shifting rack bar 71. saldbaris slidably mounted in the rear up- 60 per portion of the case 2 and is provided with a series of rack teeth-7 2 along its underside in engagement with a pinion 73 mounted on the innerend of shaft 20 connected withza retractingfspring 75 at its \other end" 6 (Fig. 11) The shaft 2 0 extends through ZLABLE Cop thefront of the case and is provided with an ind cating hand 76 operable to indicate the position of shaft-20 and the corresponding position of the master pinion 13, on a dial 77 (Ijig.v 1). Another purpose of this feature is that by inserting a pin in any particular one of the holes 77 of the dial, providing an abutment for hand 76, its movement will be arrested and the limit of travel 7 ofshaft 18 also controlled so as to check the master pinion 13 at any desired point, for using the limited capacity only of the machine. The shaft 20 is also provided with a pinion 78 engaging a rack bar 7 9 mounted on' a suitable slideway support in the front portion of the casing, as shown, and provided with a pointer 7 9" extending through slot 7 9 and adapted to indicate the particular numeral corresponding to the wheel tier .7). with which the master pinion is in gear (Fig. 1). Mounted upon the middle portion of shaft 20 is the pinion l9 meshing into rack shaft l8-and adapted to shift it and the 'master wheels 13 in conformity with the extent of movement of the pinion 73, or controlled motion of shaft 20, under action of the sliding rack bar 71.

The forward end 69 of shouldered latch bar 70 is provided with a tapered or inclined nose, as shown, adapted to engage a" pin abutment 80 as the travel of-the carriage brings the latch bar to such point, where it is desired to disengage the actuating arm 67 therefrom to terminate movement of bar 71, abutment 80thrusting latch 70 backwardly against a. pressure spring 81, permitting the actuating arm 67 to travel along with the scale bar and marginal stop to the end of its movement. edge of the actuating arm 67 will ride over the latch end 69, depressing spring 81 and sliding by'to the initial position, when it is ready for the next operation. .The actuating arm .67 is designed, at thetime it eiiects operation of pinion 73 and shaft Q0 and its connected parts, to at the same time effect clutch engagement between shaft 44 and the hub of one of the rack actuating segmental pinions 43, or between shaft 44 and the hub of each of said pinions, depending on whether one" or both series of indicating wheels-are beingused. For such purpose a clutch 82 is splined on shaft 44, one of such clutches being positioned at each side of the center and designed to transmit movement from shaft 44.through se mental pinion 46,

depending. on which of said p1n1o ns 1s" clutched, and corresponding to the printing of: one or more-columns, whereby to operate .oneor the other of racks 30, depend1ng on" the setting oflever 38 for either addition or subtraction.

' For the purpose of actuatingclutch' 82, I." provide a clutch engaging clev s 83 atthe lower end of a lever arm 84 pivoted at 85 loo On-the back travel, the other BEST AVAILABL c to the inner side of the front wall of the easing, adapting it to swing in one direction or the other under the control of a bell crank lever 86. Said lever is pivoted at 87 on a supporting cross bar 88, its long arm being connected with lever 8% at 88, and its short arm being connected at 89 with a connecting bar or link 90 which is connected at its other end at 91 with the lower end of the primary actuating lever 92. Said lever is pivotally mounted on a. rock shaft 93 supported within the casing and extends upwardly therea'bove and is provided with an inwardly projecting terminal 94 adapted to be engaged by a cam 95 extending outwardly from the face of the lower portion of actuating arm 67 and having bevel ends or inclined terminals at each extremity, facilitating the engagement of said cam with the lever (Fig. 15). As actuating arm 67 is carried along by the marginal stop 64, as above described, cam 95 engages the end 94 of lever 92 and effects shifting operation of the lever mechanism and resulting clutch engagement of clutch 82 with the clutch hub'of segmental pinion 43. Thereupon operation of any one of the several key levers C will impart downward movement to the particular rack bar 30- which it is designed to'operate. When desired, both clutches 82 may be thrown into gear by the use of both levers 92 by the use of an actuating arm 67 havingtwocam's 95 and 95 (Fig. 19), one of the levers 92 l1aving its upper terminal 94 deflected over the top of the other so as to engage said cam 95 at the same time as the other. It is also obvious that by use of an actuating arm and a properly located cam, either lever 92 may 'be individually actuated.

In order to prevent partial operation of any oneof the segmental gears 46 and reaction thereof, should the key lever not be depressed to its limit, and in order to insure against reverse movement of shaft48 in either direction. until its full travel has been accomplished, shaft 48 is provided with an arm 96 extending. radially therefrom and provided with a centrally arranged finger 97, norm-ally held within a receiving slot in arm 96 in central position by means of a. spring 98 at each side, whereby to permit of lateral movement'of finger 97 in either direcspring over to central position again and on the reverse movement will ride along the ratchet teeth on the opposite face, interlocking with them in the same manner, until arm 96 has been retracted to its initial position (Fig. 10). As shown in Fig. 3, segment 99 is of suiiicient inclination to the plane of movement of arm 96 as to deflect its extremities to one side and the other of such plane, so as to facilitate the operation and engagement of finger 97 and insure its locking coaction with the ratchet teeth. In riding along one side of the teeth downwardly, finger 97 will be gradually pressed back by the inclined arrangement of the contacting ratchet teeth. against pressure of spring 98 on one side, the same operation, in a reversed direction, being accomplished along the other side of the ratchet teeth.

The construction and operation of the invention will be understood from the foregoing description. The computing mechanism is applicable to any of the standard makes of typewriters and provides for the various computationsordinarily carried outin the use of typewriters in billing, writing statements, reports, etc., requiring additions orsubtractions, or those computations usually provided for in special so called adding machines. It is distinctive in providing the right. hand and left hand totaler, each adapted to give its particular results, and serves as a check on the operation and results at all times. Thus, to illustrate: in the writing of remittance letters by banks, bank statement accounts, bank deposit sheets or voucher writing, the left hand totaler can be used to show the bank balance andthe righthand totaler used for the purpose of adding the amounts of checks issued. By throwing the' left handtotaler to operate in subtraction and the right hand in addition, the right hand totaler will give the total amount of the checks added, successively, indicating each additional amount, while the left hand totaler will deduct the amount of each check from the balance.

In using the machine for daily charge billing in mercantile transactions, it can be used for writing and addingitems charged in one totaler, while the other will carry the amount of items charged .during the day. The machine can also be used for condensed charge billing, unit billing, and all systems of billing where a footing or checking of bills is done, also for listing of checks, and isadapt'able for use on a typewriting machine for the purpose of addition or subtraction wherever any statement work of any description may be written on a'typewriter.

What I claim is:

1. In computing mechanism of the class described, aseries of indicating wheels having external indicating numerals and provided with internal teeth, exterior 1nteren-' gaging transmitting wheels, a longitudinally,

movable master pinion adapted to engage ion through the slotted sleeve.

A aging transmittin said indicating wheels individually, a slotted sleeve extendi through the master pinion, means for rotating the slotted sleeve, a rack toothed thrust shaft, and a rotatable terminal' thereon oonnected'with the master 2. In computing mechanism of the class described, a series of indicating wheels 'having external indicating numerals and pro vided with internal teeth, exterior interenwheels, alongitudinally ovable master pinion-adapted to engage said indicating wheels individually, and means for rotating the master wheel and its engaged indicating wheel embodying arotatable slotted sleeve and a thrust shaft having a portion rotatably connected with the master pinion through said slotted sleeve.

3. In computing mechanism of theclas's described, a series of indicating wheels pro vided with internal teeth, exterior interengaging transmitting wheels,

, with a terminal actuat ng gear.

. '5. The combination with a series of internally toothedindicating wheels and in tervening motion-transmitting .mechanism therefor, of a longitudinally adjustable interior master pinion, athrust shaft therefor, a surrounding slotted sleeve rotatably engaging the master pinion and provided witha terminal actuating gear, and mechanism operable to actuate said terminal pinion in:

either direction.

6. The combination with a series of indicating wheels provided with intervening motion-transmitting gears, of a longitudinally adjustable master wheel provided with rotating mechanism, a double-sided rack bar, means for actuating the rack bar, and adjustable mechanism for'transmitting movement from oneside of said rack bar to the master pinion rotating mechanism, substantially as set forth.

7. The combination with a series of indicating wheels provided-with intervening motion-transmitting gears, of a longitudinally adjustable master wheel provided with rotating mechanism, a'doub e-sided rack bar, means for actuating the rac Y bar, adjustable mechanism for transmitting ovement from one side of said rack bar to th gmaster inion rotating mechanism, and mec anism or ada longitudinally movable master pinion adapted' to engagerack bar a bar,

A ting mechanism;;from the rack shaft to said parts, substantially as set forth.

8. The combination with a series of indij usting the transmit eating wheels, master wheel, sleeve and its pinion; of a tilting composite ratchet --toothed spring pressed,

frame provided with means for actuating'the thrust bar in conformity with the carriage travel of the typewriter, a vertically movable rack bar and mechanism adaptin it to transmit rotatable movement to the sl eeve and master pinion,

and means connected with the operating type levers of the typewriter for transmitting movement to the vertically movable rack bar, substantially-asset" forth. 10. The combination with a series of in- -dica ting'-.wheels, master wheel, sleeveand its pinion; of a tilting'frame provided with composite; ratchet-toothed spring-pressed pinions, a vertically movable double-sided operable toengage one or the other pinions, a gear engaging the rack and mechanism connected with the 'key of said bar,

levers of. a typewriter .for'actuating said gear, substantially vas set forth. he combination with a'series' of ind ieating wheels, master wheel, sleeve and its pinion;- of atilting frame provided withl,

composite ratchet toothed spring pressed pinions, a vertically movable double-sided rack bar operable to engage one ortheother of said pinions,

bar, andmechamsm embodying lostmotion devices connected with the key .leversof a typewriter for actuating said gear, substantially asset forth. 1

12. The combination with aseries of indicating wheels, master wheel, sleeve and its pinion,- of a tilting frame provided with composite ratchet-toothed spring-pressed pinions, a-vertically movable double-sided rack bar operable'to engage one or the other ofsaid pinions, a gear engaging the rack and mechanism comprising a plurality of gears connected with the key levers of a typewriter and embodying locking devices for the inoperative gears, for actuating said gear, substantially as set forth. 5

13. The combination with a series of indicating wheels, master wheel, sleeve and its pinion; of a tilt" g frame provided with composite ratchet toothed springpressed pinions, a vertically movabledouble-sided raclrbar, a shaft having a gear engaging the rack bar and provided with a plurality of separately operative gears and. clutch mechf 7 a gear engaging the. ra k BEST AVAILABLE COP:

anism, and means for actuating said sepa rately operative gears, substantially as set forth.

14, The combination with a series of indicating wheels, 1naster wheel, sleeve and its pinion; of a tilting frame provided with composite ratchet toothed spring pressed pinions, a vertically movable double-sided rack bar, a shaft having a gear engaging the rack bar and provided with a plurality of separately operative gears, clutch mecha nism and means for actuating said sepazitely operative gears, substantially as set forth.

- 15. The combination with the indicating mechanism and theniaster wheel, sleeve, its pinion, rack shaft, and shifting gear there for; of mechanism for reversibly actuating the master wheel embodying a vertically movable double-sided rack and a tilting frame pivoted on the sleeve andprovided at each side with a two-part ratchet pinion cooperable with the sleeve pinion and the rack, substantially as set fort-h.-

"16. The combination with the indicating mechanism and the master wheel, sleeve, its pinion, rack shaft, and' shifting gear therefor; of mechanism for reversibly actuating the master wheelembodying a, vertically movable double-sided rack and a tilting frame pivoted on the sleeve and provided at each sidewith a two-part ratchet pinion coiip'erabie -iviththe sleeve pinion and the rack, and spring mechanism maintaining the two-part ratchet pinions in engagement and permitting reversal of'one member thereofby the rack without imparting motion to the other,-'substa1itially as set forth.

17. The combination with the indicating mechanism and the master wheel, sleeve, its

pinion, rack shaft, 'and shifting gear therefor; of mechanism for reversibly actuating the master wheel embodying a vertically movable double-sided rack and a tilting frame pivotedon the sleeve andprovidedat each side with a two-part ratchet pinion cooperable with the sleeve pinion and the rack and provided with'mean's for shifting the tiltingframe, substantially as set forth.

18. The.combination with the indicating mechanism and-the master wheel, sleeve, its pinion, rack shaft, and shifting gear therefor; of mechanism for reversibly actuating the master wheel embodying a vertically movable double-sided rack and a tilting frame pivoted on the sleeve and provided at each. side with a two-part ratchetpinion cooperable with the sleeve pinion and the rack and provided with a lever for shifting the tilting frame, substantially as set forth.

19. The .combination with'the indicating mechanism and the master wheel, sleeve, its pinion, rack shaft, and shifting gear therefor; of mechanism for reversibly actuating the master wheel embodying a vertically movable double-sided rack and a tilting frame pivoted on the sleeve and provided at each side with a two-part ratchet pinion c0- operable with the sleeve pinion and the rack and provided with a lever for shifting the. tilting frame, said lever having.a slotted itniczlilting covering plate, substantially as set 'ort 20. The combination with the actuating rack for the master wheel actuating mechanism, of a shaft having a gear en rack and provided with a plurality of lost motion pinions, a shaft having a corresponding series of loosely mounted coacting gears having lost motion engagement with the shaft, and means for actuating each of said gears separatel substantially as set forth.

agin the 21. The combination with the actuating rack for the master wheel actuating mechanism, of a shaft having a gear engaging the rick and provided with a plurality of ears having progressively numbered teet a. shaft iaving a series of loosely mounted co acting gears having lost motion engagement with the shaft, and means for actuating each of said gears separately, substantially hs st iug each of said gears separately, substantially as set forth.

23. The combination with the actuating rack for the master wheel actuating mechanism, of a shaft having a gear engaging the rack and provided with a plurality of gea rs having progressively numbered teeth,

a shaft. having a series of loosely mounted co-acting gears having a pin and slot engagement with the shaft, means for locking the other gears of the shaft, and means for actuating each of said gears separately, substantially as set forth.

24. Means for actuating the master wheel controlling rack consisting in a shaft having a gear engaging-the rack and provided with a plurality of mutilated'gears mounted on said shaft for lost motion, a shaft provided with a corresponding series of driving gears, and means for actuating the driving gears singly, said gears having portions providing for lost motion of the driving gears, substantially as set forth.

25. Means for actuating the master wheel controlling rack consisting in a shaft having agear engaging the rack and provided with a plurality of mutilated gears mounted on said shaft for lost motion, a shaft provided with a corresponding series of driving gears BEST AVAILABLE COP.

mounted thereon to admit of movement of one gear independent of the others, individual actuatin means for each gear, and means for lociing' the emaining gears against movement, substantially as set forth.

' 26. Means for actuating the master wheel controlling rack-consisting in a shaft hav- 1 ing a gear engaging the rack and provided driving engage the gear abutme'nts, andlever mech-- with a plurality of mutilated 'gears, a shaft 10 rovided with: .a. corresponding series of driving gears having locking shoulders, in-

dividual-actua-ting mechanism for eachdriving gear, and cam-actuated pawls adapted to engage the shoulders of the inoperative driving gears," substantially as set forth.

27. Mechanism for locking a series of cars for the rack actuating mechanism eac provided. with anabutment, consistingof a supportin shaft,a cam thereon, a serie'sof pawls, an lever mechanism op-- erati'vely engaging the stantially as set forth. 28. Mechanism for locking the rack shaft for the'masterwheel consisting of an interlocking arm, a partly rotatable shaft, a cam thereon, shaft rotating mechanism, and lever cam and pawls, sub- -mechanisn 1.operatively engaging the cam and said lnterlocking arm, substantially as set forth.

' 29. Mechanism for locking the rack shaft for the master wheel and the soi ies'of driving'gears for the rack actuating mechanism each provided with an abutment, consisting of an interlocking arm for the rack shaft, a supporting shaft for the driving gears, a cam thereon, a series ofpawls adapted to actuating each gear separately, and means for preventingreverse movement of the shaft before it has been rotated to its full normal movement, substantially as set forth.

31. The combination with the intermittently operative shaft for the driving gears, of an arc-shaped inclined ratchet faced arm, and a locking arm secured on the shaft having a spring terminal adapted to traverse the inclined faces of the ratchet faced arm, substantially as set forth. S

32. Locking mechanism for the driving gear shaft consisting of an are shaped ratchet faced arm concentric with the shaft and angularly arranged across its longitudinal center, and a locking arm secured to the shaft having-a spring terminal adapted to traverse the faces of the ratchet faced arm and to interlock therewith, substantially as setfonth.

'33; The combination with a driving Shaft provided with a'sries of driving gears, a driven shaft provided with.a'series of coacting driven gears, a rack actuatin gear,-:

and a clutch; of lever mechanism -,or theclutch, and a movable cam adapted to actu'-- ate the lever mechanism andclutch, substantially as set forth.

34. In a typewriter, the combination with computing and indicating mechanism j emv-'ll$ bodying a series of indicating wheels, amaster .wheel therefor, and mechanism for shifting and rotating the master wheel embodying a rack bar; of individually operative gearing for actuating the rack bar, clutch mechanism adapted to efi'ectoperative con nection thereof, clutch actuating lever-mech-" the carriage of the typewriter adapted to actuate the clutch actuating lever 'meoha-- nism, substantially as set forth.

,anism, and a cam mounted to travel with 35. In a typewriter, the combination with two sets of computing and indicating mechanism embodying series of indicating wheels,

each having a master wheel and mechanism for shifting and rotating the master; wheel embodying a rackbar; of gearing for actu-. ating the rack bars, clutch mechanlsm adapt.- ed to effect operative connection of the gearing toactuate the mechanism foreachmaster wheel, corresponding clutch actuating lever mechanism, and cams mounted 'to travel with the carriage of the typewriter. adapted to actuate each clutch actuating le-- ver mechanism, substantially as set forth. 7

.36. In computing'an'd indicating mecha-.

nism for a typewriter, the combinationwith' the master wheel and its rack shaft, of a transverse shaft having a gear engaging the rack'shaft and a driving pinion, a rack bar engaging the driving pinion and having a latch, and an arm mounted to travel with the carriage of the typewriter adapted to engage the latch to shift the rack bar, substantially as set forth.

'37. In computing and indicating mechanism for a typewriter, the combination with the master wheel and its rack shaft, Offl transverse shaft having a gear engaging the rack shaft and a driving pinion, a rack bar engaging the driving pinion and having a latch, an'arm mounted to carriage of the typewriter adapted to engage the latch to shift the rack bar, and a stationary abutment adapted to effect disconnection of the latch from the arm, substantiallyas set forth.

38. In'computing and indicating mechanism for a typewriter, the combination with the master wheel and its rack shaft, of a transverse spring retracted shaft having a. gear engaging the rack shaft and a driving pinion, a rack bar engaging the driving pinion, means actuated by the carriage of the typewriter adapted to shift the rack bar,

travel with the I EST AVAILABLE COP;

and means indicating the position of the rack shaft actuating shaft, substantially as set forth.

39. In computing and indicating mechanism for a typewriter, the combination with the master :wheel and its rack shaft, of a transverse shaft having agear engaging the rack shaft, a driving pinion, and an indicator, a rack bar engaging the driving pinion, and means actuated by the carriage of the typewriter adapted to shift the rack bar, substantially as set forth.

40. ln computing and indicating niecha I nism for a typewriter, the combination with the master wheel and its rack shaft, of a rack shaft, a driving pinion,.and an indicator, a dial therefor, means limiting the travel of the indicator on the dial, a rack bar,engaging the driving pinion, and means actuated by the carriage of the typewriter adapted to shift the rack bar, substantially asset forth.

In testimony whereof I hereunto afiix my signature in the presence of two witnesses.

o. M. on; FREDK. swi

flopiel of this patent may be obtained for live cent: each, by addressing the Commissioner of Patentl,

I Washington, D. 0.

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