US1000361A - Type-writing machine. - Google Patents

Description

J. H. BARR. TYPE'WRITING 'MAGHINE.

APPLICATION FILED MAY 26,1905.

1,000,361 v Patented Aug. 15,1911.

4 BHEET8-BHEET 1.

WITNESSES. INVENTOR.

52% &. 1 /2 ATTORNEY.

0 J. H. BARR. TYPE WRITING MACHINE.

APPLIOATION I'ILED MAY 26, 1905.

1,000,361, Patented Aug. 15,1911.

4 BHEETS-BHEET 2.

WITNESSES LJ INVENTO/mi J. H. BARR.

TYPE WRITING MACHINE.

APP LIOATION FILED MAY 2a, 1905.

LUUQBBI. I Patented Aug. 15, 1911.

4 SHEETS-SHEET 3.

WITNESSES 1N wzzv TOR.

.A TTORNE y.

.Elid icant erosion.

JOHN H. BARR, OF SYRACUSE, NEW YORK, ASSIGNOIR TO THE SMITH PREIVIIER TYPE- VTRI'IER COMPANY, OF SYRACUSE. INEKV YORK, A CORFORA'IION 0]: NEW YORK.

TYPE-WRITING MACHINE.

1i ,ooasci.

Specification of Letters Patent.

Application filed May 26; 1905.

Ltatented Aug. 15, 1911.

Serial No. 262,395.

To all whom it may concern:

lie it known that .l. Joun ll. Ilium, citi- Zen of the United States, and resident of Syracuse, in the county of Onondaga and State o't New York, have invented certain new and useful Improvements in Type- VVriting ltlachines, of which the Following is a specification.

My invention relates to typcwriting one chines and more particularly to the type actions of such machines. M y invention more especially designed for use in a .t'rontstrike mat-him but it is capable of adaptation to other styles of typewriting machines.

h liy invention is illustrated in the acc0mpa nying drawings in which,

Figure 1 is a front to rear vertical sectional view of a front-strike machine. Fig. 2 is a transverse View of the same, the section being taken on a plane back of the type bar se n'ients. Fig. 3 is a detail View similar to Fig. 1 but taken on a slightly dill'erent section. Fig. l is an isometric view or a portion of the segment on which the sublevers a re mounted. Fig. is a similar view of one of said levers. Fig. 6 is a diagrammatical View of the key cmmections. Fig. 7 is a view of one row of key levers as seen from a point below and in front at the machine.

The base portion of the main :l'rame ot the machine shown in the drawings, connnises side plates l connected together at the rear by an end plate 2. Posts 2 3, rising from said side plates, support a top plate lon which is secured a bar or rail 5 having in its front and rear edges ball races which coiipeialc with corresponding ball races in a. carriage (i which supports a platen 7. i'\nt.itriction balls or rollers 8 run in said ball races and sup port the carriage which may be drawn across the machine by the usual spring drum and the motion of which may be controlled by any suitable escapement mechanism. That. portion of the top plate t whicais in front of the carriage is .arehed as shown at 9 and two type bar segments 10 and ll are secured at their ends in any suital'ile manner to the under side of said. arclnal portion ot' the top plate. its tar as some at the teatures o'l. my invention are =;-.o1n-crnerl one ot said ty 'ye bar segments might be dispensed with if ll-mired; and a far as certain other teatures at my invention are concerned these two segments might be replaced with a single segment havingtwo sets of type bars mounted thereon. Both oi. the segments 10 and 11 are mounted below the platen, the segment 10 being of less radius and situated a little nearer the back of the machine than the segment 11. A set of type bars 12 is mounted on. the segment 10 and a set of longer type bars 13 is mounted on the see ment 11, each of said type bars carrying at its tree end a type 1%.. As shown in the present instance the segments 10 and 11 consist of rods havingtermed therein a series of annular \l shaped grooves which con stitule ba ll races and each of the type bars is formed at its pivotal end with an enlarged eye which surrount s the segment and which is internally grooved to form. a ball race that coiiperates with the hall race in the segment. Antitrictitm halls running in these cooperating hall races constitute ball hearions for the type bars.

As shown in Fig. 2 the heels of the shorter type bars 12 are arranged quite close together, there being little it any more room between them than is desirable for clearance. The types 1 mounted on these type bars therefore are spaced farther apart than the heels .of the type bars this being due to the fact that said type bars when in their normal positions are at a greater angle than 90 t'rom the printing point. The are in winch the types are arranged is an arc of greater radius and consequently a longer are than that in which the heels of the type bars are arranged. it is due to this fact that there is room between the types on the shorter type bars 12 for the longer type bars 13-5 to play between said types. The shorter type bars as they lie in the basket flare or radiate or diverge from their pivot ends toward their free ends thus leaving between them spaces for the motion of the longer type bars. This arrangement enables me to get into the machine a maximum number of type bars of moderate length and it will he understood that this arrangement may be attained by other means than those here shown. The type bars are here shown i'nountcd on two separate segments hot the :ulrantan'es ot' the arrangenient just dc serihial may he swan-Hi in other ways than by the use of the separate grooved segm nts shown.

Aythird segment iii of greater dian'ieter one of than either of the type bar segments, is secured to the under side of the top plate 4 in any suitable manner and lies beneath said type bar segments. A series of links or were were pivoted in radial slots 17 (Fig. formed in the rear edge of the segment and said links or levers extend in a direction approximately radial of the several segments. A slot 17 (Figs. 1 and 4:) is formed in the under side of the segment 15, and a wire 18, lying in said slot, serves as a pivot for all of the sub-levers 16. Each of the levers 16 has pivoted to its free end at 151a link 20, the other end of which is pivoted at 21 to an ear projecting from the heel of one of the type bars. As shown in the present instance the lever 16 and the link 20 are in substantial alinement and extend in a direction approximately radial of the segments. As shown in the present instance, the pivots 18, 19 and 21 lie substantially ip a straight line when the parts are in their normal position, but the pivot 19 may stand normally somewhat In advance of a line joining the pivots 18 and 21 if pre ferred. Each of the links or levers 16 has a link 22 pivoted thereto at 23 about midway of the length of said lever 16. Said link extends toward the front of the machine and its forward end is pivoted at 24: to the depending arm 25 of an angled key lever, the forwardly extending arm 26 of which has pivoted thereto the stem 27 of a key 28. The construction is such that if the keys 28 he depressed the corresponding link 22 will pull the lever 16 toward the front of the machine and throw the type bar to the printing point, as indicated by dotted lines in Fig. 3. The parts are returned to normal position by a returning spring 29 which lies beneaththe segment 15 and which is connected at its rear end with a hook 80 formed on the heel of the lever 16 and at its forward end to one of a series of hooks 31 formed on the forward edge of said segment 15. The motion of the parts under the impulse of the returnii'ig spring is limited by a collar 32 fixed to the key stem 27 and having mounted above it a washer 33 of felt or other sound, deadening material, which engages the under surface of the keyboard 34, through suitable openings in which the several key stems project. Each of the levers 16 has the form shown in Fig. 5. An open-ended slot formed therein enables'the lever to be slipped. over the pivot wire 18- and the rear end of said slot constitutes the bearing of the lever on said wire. A notch 36, formed inthe upper edge of the slot 35, is adaptedto prevent the lever from becoming accidentally displaced from the pivot wire.

In case a type bar should stick and the operator pull up on the key 28 it will be seen that the link 22 would tend to push the lever 16 off of its pivot. notch 36 would engage the wire 18 and prevent further displacement of the lover. The type bars 12 and 13 have their free ends normally supported by' a segmental type rest 40 which is secured at its ends to the under side of the top plate l.

I prefer .to form the links 20 with a back wardly projecting curve as shown in the This avoids interference between; the link and the pivotal end of the type.

drawings.

bar,.and also gives elasticity to. the link. The links 22 are also curved downward near their forward ends, partly for the sake of elasticity and partly to avoid interference between the links and the forwardly extending arms 26 of the bell cranks 25, 26 when the keys are depressed. This will be understood by reference to Fig. 1 in which one key is shown in its depressed position.

The bell cranks 25, 26 are pivotally mounted on a series of transverse ,rods 41 which pass through and are supported by a series of partition plates4=2 (Figs. 1 and 6). These partition plates are supported by two frame rods 43 (Fig. 1) which are supported at their ends in the side plates 1 and the partitions are spaced apart on said frame rods by collars 44. The keys are arranged in transverse and longitudinal rows and there is one partition 42 between each consecutive pair of longitudinal rows. The

bell cranks 25, 26 have the form best shown in Figs. 3 and 7. Said bell cranks are formed of sheet metal and each of the arms 26 consists in fact of two branches joined In this case the together by a strip 45, which spaces the two arms 26 a suitable distance apart so as to cause the bell crank to occupy substantially theentire space between two partitions 42. Said arms 26 are bent toward each other so as to embrace the key stem 27, the whole, as seen from the top having about the shape of the letter A. The arm 25 of the bell crank consists of a downward extension of one or the other of the arms 26.

The present machine is a full keyboard machine having a single type on eachtype bar. I have shown forty-two type bars mounted on each of the segments, and, as will be seen by reference to Fig. 2, thetype bars of one segment alternate with those on the other. The entire eighty-four levers 16 are mounted on the segment 15 and every other lever is connected with a. short typebar and the alternate levers with the long type bars. The links 22 which extend to the keyboard also'alternate, one being connected with a short type bar andthe next succeeding one to a long type bar. As the short type bars are, or may be, lighter than the longer ones, I prefer to mount the lower case type on them, said type being more frequently used than the upper case type. Furthermore, it is desirable and usual to Ill? ' those which are connected with short type place the lower case keys near the front of l the keyboard and the upper case keys and l character keys near the back of the key board. The connections of the links 22 with the type. bars and with the several keys are represented diagrannnatimilly in Fig. (i, in which said links are represented by lines ex tending toward the top of the sheet. In order to make the arrangement more apparent, I have represented those links 22 which are connected to the longer type bars by lines which project farther toward the top of the sheet than those lines which represent l links that are connected to the shorter type bars. As a matter of fact, those links which are connected to the shorter type bars extend farther towz'nrd the back of the machine than those which are connected to the longer type bars, but the convention adopted will not be misunderstood with this explanation. These are seven transverse rows of keys and the three front rows are all connwtcd with short type bar." and the three rear rows are all connected with longer type bars. The keys of the fourth or middle row are core nected alternately with long and with short type bars. As the links 22 which are connected with long type bars alternate with bars. in order to avoid crossing of said links and interference between them the arms 25 of the several bell cranks are bent to the right or left. as required. so as to bring the free end of each particular arm into alinement with the particular link to which it is connected. As will be understood by reference to Fig. (3, the middle key of the extreme left-hand longitudinal row of keys has its arm 25 connected with the left-hand arm 20 of its bell crank and extending substantially straight down from said lefthand arm so as to connect with the extreme lefthand link which. as will be seen from the j diagranu isconnccted with a short type bar. The second link is connected with the rear key of the row which has its arm 25 bent sonnrwhat toward the right in order to propcrly connect with said link. this link being connected with a long type bar. The third link being connected with a short type bar, extends forward to the third key of the row which has its arm 25 bent. still farther to the right. lhe fonrth link which is connected to a long type bar. extends to the sixth key of the row, the fifth link to the second key of the row, the sixth link to the fifth key and the seventh link to the first kev. in the second row of keys the middle key is connected with a long type bar. The next: link 22 is' connected to a short type bar and therefore extends forward 1"- the third i kcv of the row: the next one terminates at the rear key of the row and so on across the machine.

lt will, of course. be understood that the particular arrangement of the connection hc tween the scvcral'ln-ys and the several type bars above described in detail may he very mnsidcrahly varied and in some instances it may be desirable to vary these connect ions,

- for example. in case the connections described resulted in undesirable tannhinations in the type basket.

It will be perceived by reference to Figs. 1 and 3 that the long type bars in operation turn through substantially 90; but the short. type bars turn through a greater angle. The construction is such that the two types move approximately the same distance in passing from their normal positions to the printing point.

By reference to Fig. 3 it will be perceived that the links 20 and and the lever 16, connected with one of the type bars. eonstitute a connection which gives to the type bar a very easy and gentle start and a continuous acceleration. The link .30 and the lever 16 together constitute a toggle and the type bar is actuated by the breaking of saidtoggle. As the type bar approaches the end of its stroke. however, the link 20 reaches a. position where it approximately at right angles to the lever 16. at the beginning of the stroke the link approximately at right angles to the lever 16 so that it acts on said lever with the greatest leverage that it has at any point of the stroke. Near the end of the stroke the lever 16 and the link are at a wide. obtuse angle to ach other. The accclm'ation in the first part of the stroke is due chictly to the breaking of the toggle and the acceleration in the latter part of the stroke is due chielly to the widening of the angle between the link 22 and the lever 16.

lt will be urrccivcd that although the key is acting on the type bar at a greatly reduced mechanical advantage or leverage when said type bar is at the printing point, ncvcrthcless. the returning spring is acting on said type bar at a good advantage or leverage. thus atl'or'ling a quick return to the type bar, This is due to the fact that on the down stroke of the key both the point It) at which the link 20 is pivoted to the sub-lcve' and the point 2L at which said link is pivoted to the type bar, move in the sanic general di rection. that is to say, they both more toward the front of the machine; and when the parts are in printing position the line joining the points 19 and 521, if extended, lies at 'a considerable distance from the centcr of the type bar segincnt'so that the link 20 has a good leverage on said type bar. At this part of the stroke the spring 52!) has as good a leverage on the sub-lever a; as it had at the beginning of the stroke. although the link 2? has a much less leverage on said sublcver than at the beginning of the stroke. Moreover, at this time the spring Ail has a ()n the other hand,

much higher leverage on the link 22 than it had at the beginning of the stroke, so that in the first part of the returnstroke the link 22, the key lever and the key offer but little resistance to the returning spring, thus leaving most of the force of said spring concentrated on the type bar. It will also be perceived that when .the parts are in their normal position it is the collar 32 on the key stem that resists the tension of the returning spring 29, so that in normal position all lost motion between the lever 16 and the key is taken up by the tension of the spring.

Various changes in the details of construction and arrangement may be made without departing from my invention.

What I claim as new and desire to secure by Letters Patent, is

1. In a typewriting machine, the combination of a segmentally arranged series of frontstrike type bars; a segmentally arranged series of operating links pivoted to the heels of said type bars and normally extending therefrom in directions approximately radial of the type bar segment and approximately parallel to ,the plane of said segment; a series of links or levers connected to said operating links, normally extending therefrom in directions approximately radial of said type bar segment and pivoted at a segmentally arranged series of fixed points; a series of keys, and connections between said keys and said links or levers.

2. In a typewriting machine, the 'combination of a type bar segment; a series of front strike type bars supported. by said segment; a. series of operating links pivoted to the heels of said type bars and normally projecting therefrom in directions approximately radial of the type bar segment and approximately parallel to the plane of said segment; a. series of links or levers pivoted to said operating links and normally extending therefrom in directions approximately radial of said type bar segment; a second segment on which said links or levers are pivotally mounted; and a series of keys connected with said links or levers.

3. In a typewfiting machine, the combination of a type bar segment; a second segment of greater diameter than said type bar segment and'lying.approximately in the same plane as said type bar segment; a series of type. bars pivotally mounted on said type bar segment; a series of levers pivoted in saidsecond segment and extending in directions approximately radial of said segment; a series of links connecting said levers and said type bars and extending approximately radially of said segments;'a series of links connected with said levers and extend ding toward .the front of the machine; and a series of keys connected with said links.

4. In atypewrit ing machine, the combinat1on of -aplaten; a type bar segment disposed below said platen; a second segment of greater rad-ins than said type bar segment and situated beneath the same; a series of front-strike type bars mounted on said type bar segment; a series of levers pivotally mounted on said second segment and extending toward the heels of said type bars in directions approximately radial of said segments; a series of links connectingsaid leverswith said typel bars and disposed ap'' proximately radially of said segments; a series of links connected with said levers and extending toward the front of the machine; and a series of keys connected with said links.

5. In a typewriting machine, the combination of a platen; a type bar segment lying below said platen; a second segment of greater radius than said type bar segment lying beneath said type bar segment; a series of type bars mounted on said type bar segment; a series of links pivoted to the heels of said typebars and extending there from in directions approximately radial of said segments; a series of levers pivoted in said second segment and extending in directions approximately radial of said segments and pivoted to said links; a series of links pivoted tosaid levers and extending toward the front of the machine; aseries'of angled levers to which said links are pivoted; and a series of keys connected. with said angled levers. v

6. In a typewrit-ing machine the combination of a platen; two type bar segments disposed below said platen, one of said type bar segments being of greater radiusthan the other; a third segment of greater radius than either of said type bar segments and lying approximately under said type bar segments; a series of shorter type bars mounted on one of said type bar segments; a series of longer typebars mounted on the other of said type bar segments and alternating lengthwise of said segments with said shorter type bars; a series of links pivoted to the heels of the several type bars and extending therefrom in directions approximately radial of said segments; a series of levers pivotally mounted in said third segment and extending in directionsapproximately radial of said segments and having said links pivoted thereto; a second series of links pivoted to said levers and extending toward the front of the machine; ,and a series of keys arranged in a plurality of transverse rows and connected with said second series of of keys; and a series of connections between said keys and type bars including a series of links extending from the keyboard toward the back of the machine and connected at their 't'orward ends with. the keys, those keys that lie near the front of the keyboard being connected with the shorter type bars and those keys lying near the back of the keyboard being connected with the longer type bars.

in a tront'strike typmwiting machine the combination of a platen; two series of front-strike type bars, the type bars of one series being longer than those of the other and the type bars of one series altermiting with those of the other; a series of keys; a series of hell crank levers operated by said keys; and a series of links extending from said bell crank levers toward the back oi the machine and operativcly connected with said type bars, those links that are connected with keys near the front of the keyboard being connected with shorter type bars, and those links that are connected with the keys near the back of the keyboard being connected with the longer type bars. 7

9. In a typcwritin machine, the combination of? a series of shorter type bars: a series o't' longer type bars; a series of keys ar-- ranged in rows transversely and longitudinally of the machine; a series of hell crank key levers, each having an approximately horizontal arm and an approximately vortical arm said horizontal arms being connectied with said keys; a series of links connccted with said vertical arms and extending to Ward the back of the machine and connected with said typcbars, those links that are connectcd with keys near the front of the kcyboard being connected with the shorter type bars and those near the ba ck of the kevboard being connected with longer type bars, the vertical arms of said key levers being so disposed transversely of the machine that those links which are connected with the shorter type bars alternate with those links that are connected with the longer type bars.

10. In a 't'ront-strike typewriting machine, the con'ibini'ition of a type bar segment; a series of front-strike type bars pivot tlly mounted on said segment; a series of toggle linkz'igcs pivoted to the heels of said type lmrs and extending therefrom in directions approximately radial of said type bar segment and each comprising a link and a lover: a second segment approximately concentric with said type bar segment: and having said levers pivoted thereto; returning springs connected with the heels of said levers and drawing the samc toward the Front of the machine: linksadapted to pull said levers toward the front of the machine; bell crank key levers connected With said links: and keys connected with said bell crank key levers.

11. in a front-strike type riling machine, tlic combination o'li a scglncnlally arranged series of .t'ront-striko typo bars; a :--:cri -s ot toggle linkages connected with the heels of said type bars and cxlcnding lhcrcl'rom in directions approximately radial ot the type bar segment; a scrim: ot' bell crank key levers connected with said logglc linkages; a series of keys having stems connected with said bell crank levers; a series of rclurning springs acting on said toggle linkages; and a series of stops on said kcy stems.

lo a typmvriting machine, the con1bination of a type bar; a sub-lever connected with said type bar; and a key connected with said sub-lover, said sulr-lcver having an opcn-cmlcd slot by which it is pivoted, said opcn-endcd slot being formed between the pivot and the open end of the slot, with a notch to prevent accidental displacement of said sub-lever From its pivot.

the combination of a type bar segment, a series of trontslrikc lypc bars mounted on said scgmcnt, a series of links pivoted to said type bars and extending therefrom in directions substantially radial of said type bar segment, a series of sub-levers pivoted to said links and extending in directions substantially radial oi said type bar segment. a series of links pivoted to said sublevers and extending toward the front of the machine approximately at right angles to said sub-levers, keys for operating said links, and restoring springs connected with said sub-lcvcrs.

l t. in a front-strike typewriting machine, the cmnbinalion o'l a typo bar segment, a series of trout-strike type bars mounted on said segment, a series of links pivoted to said type bars and extending therefrom in directions substantially radial of said type bar segment, a series of sub-levers pivoted to said links and extending in directions substiintially radial of said type bar segment, a series oi. links pivoted to said sublcvcrs and extending toward the front, of the machine from said snl'i-lcvcrs, keys for operating said links, and restoring springs connected with said sub-levers.

1.3. in a front-strike typowriting machine, the combination of a type liar segment, a series of type bars mounted on said segment, a series of links pivoted to said type bars and extending thcrel'rom in directions substantially radial ol said type bar segment, a series of sub-levcrs pivoted to said links and extending in directions substantially radial ol said type bar segment, a series of links pivoted to said sub-levers and extending toward the front of the machine. said links being approximately at rightangles with the snlrlevers when the parts are in normal position and at an obtuse angle with said sulrlevcrs when the parts are in print- 13. in a 'l ront-strili'e typcwriting machine,

therefrom toward the front of the machine;

said forwardly extending links acting on said sub-levers with decreasing leverage as the keys are depressed; and returning springs connected with said sub-levers in such manner that the leverage of said springs on said sub-levers is substantially as great at the end of the stroke as at the beginning.

17. In a front-strike typewriting machine, the combination of a platen; a plu: rality of type bar segments of different radii mounted below said platen and one'below the other, a series of type bars mounted on each segment, the type bars of one set working between the type bars of the other set, a series of operating links pivoted directly. to the heels of the type bars of each of said series and arranged behind said segments and extending in directions approximately radial of'said segments, and means for operating saidlinks.

18. In a front-strike typewriting machine, the combination of a platen, a plu: rality of type bar segments of different radu mounted below said platen, and one segment below the other, a series of type bars on each ,such segment, a sub-lever segment mounted beneath said type bar segments, a series of sub-levers mounted on said sub-lever segment, and a series of links connecting said sub-levers with the type bars on both type bar segments, each of said links being connected directly to a type bar.

19. In a typewriting machine, thecombination of a series of keys arranged in straight longitudinal and transverse rows; stems for said keys; angled key levers each having an arm pivoted to -a key stem, said arm consisting of two branches that spread from the key stem toward the pivot of the lever so as to afiord a wide pivot for-saidf lever, the other arm of each of said'levers consisting of an arm of one of said branches; links pivoted to the second mentioned arms, and type bars operated by said links, said secondarms being bent transversely of the machine, each arm being bent to an appropriate extent to connect it with the desired link.

20. In a typewriting machine, the combination of a series of keys arranged in a row extending longitudinally of the machine; a key lever for each key, said key lever having an-A-shaped arm to which the stem of the key is connected and a second arm depending from one of the branches of said A-shaped arm, the second arm of the several levers depending some from the right-hand and some from the left-hand branches of the, A-shaped arms and said second arms be ing bent inward to different extents; links pivoted to said second arms and extending toward the back of the machine, and type bars operated by said links.

21. In a typewriting machine, the combi nation of two sets of front-strike type bars pivotally mounted one set below the other, the type bars of one set alternating with those of the other, a' series of links pivoted to the heels of the several type bars, and extending therefrom in lines that radiate approximately from the printing point, a series of levers pivoted to said links and extending radially therefrom, a second series longer type bars.

22. In a front-strike typewriting machine,-

the combination of a platen, a plurality of setsof front-strike type bars of different lengths pivotally mounted below said platen and one set below another, a series of operating links pivoted directly to the type bars of each of said sets and extending therefrom in lines that radiate from the printing po nt, and means for operating said- .links, the lll'lkS connected with the shorter type bars extending behind the heels of the longer type bars.

23. Ina front-strike typewriting machine,

the combination of a platen, a plurality ofv sets of front-strike type bars pivotally mounted below said platen and one below another, a sub-lever segment mounted beneath the pivotal ends of said type bars,': a serles'of sub-levers mounted on said sublever segment and extending radially toward the heels of said type bars, and radial .links connecting said sub-levers with said type bars.

24:; In a front-strike typewriting machine, the combination of a'platen, a plurality of sets of front-strike type bars pivotally mounted below said platen and one below another, a series of radially disposed toggle linkages, each connected at its ,inner end with the heel of one-of said typebars, and means for operating said linkages, the link ages connected with the shorter series? of type bars being arranged behind the heels of the longer series of type bars.

25. In a typewriting machine, the com bination of a series of type bars arrangedin two sets, the type bars of one set being shorter than those of the. other, a series of keys, and means opcrativelyconnecting said keys with said type bars, the keys near the front of the keyboard being connected with the shorter type bars and those near the hack of the keyboard being connected with the longer type bars.

26. In a front-strike typewriting machine, the coml'iiinition of a platen; a plurality of type bar segments of (litterent radii disposed below said platen; and type bars mounted on said segments, the type bars on ascgn'ient of less radius being curved in one direction to avoid conflict with a segment of greater radius when the type bars are in normal position, and the type bars on a segment o'f'geater radius being curred in the opposite direction to avoid conflict with a segment of less radius when said type bars are in printing position.

27. In a front-strike typewritingmachine. the combination of a platen; two type loar segments of different radii disposed below said platen; and type bars mounted on said segments, "the type bars on one segment al-' ternating with and working between those on the other, and the type bars on the scg ment of 'adius being curved to avoid conflict with the type bars on the segment of greater radius when said type bars are in normal position, and the type bars on the segment of geater radius being formed to avoid conflict with the segment of less radius when said type bars are in printing position.

98. In a front strike typewriting nmchine, the combination of a platen; a main frame comprising an up 'ardly arched top plate; a plurality of segments each secured at its end to the under side o't' said upwardly arched. top plate; and type bars mounted on said segi'nents.

29. In a front-strike typewriting machine, the combination of a platen; a main frame comprising an upwardly arched top plate; a plurality of type bar segments secured to the under side of the arched portion of the top plate, one of said type bar segments being 0t grt-zater radius than the other; and a series of type bars mounted on said segments, each end of said segments rbut-ting the under side of said top plate and secured thereto by a screw.

30. In a frontstrike typewriting machine, the combination of a platen; a main frame con'iprising an arched top plate; two type bar segments one of greater radius than the other, secured to the under side of said arched top plate; a series of shorter type bars mounted on the scgn'ient of less radius and curved to avoid conflict with the segment of greater radius when said type bars are in normal position; and a series of type bars mounted on the segment of greater vrality of type bar segments of dill'erent radii radius and formed to avoid conflict with the segment of less radius when said typebars are in printing position.

31.. In a tvpcwriting machine, the combination (it a plurality of type bar segments each 'lomed with a series ol ball bearing grooves; a series Off type bars each having an eye encircling one of said segments and mounted thereon by ball bearings, the type bars on one of said segments beingrurved to avoid conflict with the other of said segments.

32. in a front-striketypewritingmachine, the combination of a platen; a plurality of type bar segments of different radii dis posed below said platen and one below the other; ball bearing grooves formed in said type bar segments; a series of type bars mounted on said segments, each of said type bars being formed with an eye encircling one of the segments and mounted thereon by ball bearings, the type bars on one of said segments being curved to avoid contlict with another of said segments.

il. in a l rontestrike typcwriting inarhinc, the combination of a platen; a pinrality of type bar segments of (.lillbi'riit radii disposed below said platen; a series ol. front-strike type bars mounted on said srgments; a series of keys; and a series of key operated links lying approximately in a .vertical plane and pivoted directly to said type bars at the rear of said segments, the links pivoted to the type bars on a segment of less radius extending behind a segment of greater radius.

Fi l. in a frontstrike typew iting inachine, the conibina'tion ot a platen; a pludisposed below said platen; a series of type bars liinllillTOtl on said segments; a series of links pivoted directly to the heels of said type bars and each lying approximately in a transverse vertical plane back of said segments; and keys connected with said links, the links pivoted to the type bars on a segment of less radius extending behind a seg ment olf greater radius.

35. in a front-strike typewriting machine, the combination of two type bar segments of ditl'erent radii, a set of longer type bars mounted on the segment of greater radius, means for actuating said longer type bars, a set of shorter type bai's mounted on the segment of less radius, links pivoted directly to the heels of said shorter type bars and extending down behind said segment, of greater radius, and actuating devices connected with said links.

36. In a front-strike typewriting rpachine, the combination of two type bar segments of ditlerent radii, the segment of greater radius being situated a little nearer the front of the machine than that of less radius; a set of longer type bars mounted on the segment of greater radius; means for actuating said longer type bars; a set of shorter type bars mounted'on the segment i of less radius; links pivoted to the heels of frame comprising an upwardly arched top plate, a type bar segment secured to the under side of the arched portion of said. top

plate, and type bars mounted on said seg ment, each end of said segment abutting the 1 under side of said top plate and secured thereto.

Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 25th day of May, A. D. 1905.

. JOHN H. BARR.

Witnesses: e a a E. M. VVELLs, M. F. HANNWEBER.

Mates of this patent may be obtained for five cents each, by addressing the Commissioner of Patents;

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