US990309A - Type-writing machine. - Google Patents

Description

i To 'aZl-who'inl'it may concern.

Nnr; acitizenof the United States, residing. at Elizabeth, inthe county of Union c collars 9 and. 10' being provided for preventing endwise displacement of the axle and [for effecting theline-spzicing movements thereof particularly with a vlew'to-corn- 15- lnventl'on 1s nothowever lumped to the uses at its inner end near said ratchet-wheel op ammo STATES PATENT QFFICE.

BURNHAM' c. s'rIcKNnY, or ELiZABETH.

, TYPEWBITER COMPANY, OF 'NEW YORK,

NEW JERSEY, ASSIGNOR "IO UNDERWOOD N. Y., A CORBOBATION OF TYPE-WRITING MACHINE.

Beit known that L'BURNHALL'C. STICK- and State o-fiNew Jersey, haveinvented certain new and useful Improvements. in

Type-Writing Machines, of which the followingiis a specification. .This invent-on relates to the line-feeding mechanism of typewriting machines; and its object to provide improved means for effecting fine adjustments of the platen and,

pactness .of parts and simplicity of construcwith cheapnessof manufacture. The

In .the drawings forming part of this specification, Figure 1 is a plan of a typewriter carriage--provided'\'vith one form'of my improvements; Fig. 2 is a sectional detail of a lever provided with a sliding line-' spacing pawl; Fig. 3 is a sectional end elevation of the line-spacing mechanism. Fig. 4 'is'i'a sectional frontielevation, the casing in which the line-spacing mechanism is inclosed being omitte s In the several viewslike parts arejidentified by like signs; f

The drawings show a platen-frame comprising front and. rear bars-1 and 2, and end bars 3 and at. Through said end bars extends an airlefi, provided at each end with a finger-wheel, as-at 6 and 7 for rotating a cylindrical platen 8 secured to said axle;

platen. Upon the axle within thegplatenframe and at the left-hand end "of the platen-frame is secured a line-space ratchet- ,wheel ll, by means of a hub 12 and screw 13, the ratchetteeth 14 being upon the outer face of the Wheel.

Line-spacing mechanism adapted t said ratchet-wheel is mounted upon a revoluble head, comprising a hollow shaft 15 having posite bent arms 16 and 17; said shaft at its outer portion beingjournaled in the side bar 3 of the platen-frame, as at 18, and b ing. hollow to afford a bearing for the platen-agrle 5 which extends entirely through i the saph'e. Said line-spacing mechanism s ecification 0: Letters Patent. Patented Apr. 25, 1911. Application filed August 11, 1903. Serial no. 169,088.

' comprises a lever 1}),hinged at 20 and 21 upon reflexly bent cross-arms 22 and 23 formed upon said revolub le head -;'the pintle of the hinge being designated as 24', and said lever havin the form of a bail-which embraces said lh'earin arms. Upon one end of the lever is for-me a cylindrical housing 25 forv asliding pawl 26, provided within the housing with a compression spring 27 coiled about astem28 formed upon the pawl, said a stem beingprovided with a cap 29 to limit the projection of the pawl from the housing. As seen at Fig.. l, the pawl stands normally -.clear .of the line-space ratchetvwheel, so that the platen may befreely rotated by either fingerswheel 6 or 7; while by movement about the axis 24, the pawl may be swung into engagement .with the ratchet-wheel to rotate the same. Upon the end of an arm'30, also formed upon said revolubjle: head, is pivoted at 31 a-detent, in

the form of a lever, one arm 32 whereof carries a roller 33 which engages the notches in the ratchet-Wheel, while the other arm 34 is connected by a draw-spring 35 to -an arm 36, the latter forming an extension of one of the bail-arms of the lever 19. The spring thus serves the two-fold purpose of applying pressure to the-detent and returning said lever to normal position after actuation. I

It will now beperceivedthat the plzttim may be rotated by either of its finger-wheels,

or given a line-space'movement by the lever and pawl; andthat it is always-held against accidental rotation by'the detent; and also that by rotating the revoluble head, together with the lever, pawl and detent thereon, the

latter carries with-it boththe ratchet-wheel and platen; whereby exceptional rotative adjustments of the platen may be eliected, together with the paper thereon, thereby facilitating writing upon ruled lines, making corrections. etc.; while at all positions to which the head may be adjusted, the lever and pawl may be open-ited to effect the'line spacing movement of the platen. For rotating sa d head, a finger-wheel 37 is pro vided upon the end thereof that projects from the platen-frame; and for holding the 1, head against accidental revolutiona. brake is employed, comprisinga spring finger 38 se cured at one end to the platen=frame and at the other end pressing outwardly against the innerside of an annulus 39 formed upon 4 the adjacent side of the finger-wheel 37 said ,brake being sufiiciently powerful to hold the revolublehead steady-at the line-spacing operation, and being considerably superior in efficiency to the detent 32, so that the. resistance of the latter may be overcome with out stirring the revoluble head,

' A line-spacing lever 40, consisting of a curved finger-piece 41 and amain forked portion 42, which bestrides the front carriage-bar 1 and the platen axle, is mounted upon a vertical pivot 43 in rear of the platen axle, and is adapted'to swing from normal position toward the right at Fig. 1, or in the directionof the return movement of the I 'carria e. The connection between said car- 7 riage ever and the pawl-carrying lever 19 which is mounted upon the revoluble head, comprises a sleeve 44, splined by means of pin 45 and $151: 46 to the tubular member 15 of said revoluble head;"said sleeve having at its outer end a groove 47 engaged by opposite pins 48, 49 fixed upon the'line-spacing lever 40, and having at its inner'end a pin 5.0 engaging a radial slot 51 formed in a spur 52 formed upon the lever 19. By means [of the spline, the sleeve 44 is caused to rotate with the revoluble head, but may move I nvhich the revoluble head may be adjusted,

jtfherealong, the latter movement being efiectd b the pins 48, 49 and annular groove 47 hat the carriage lever may effect a imovement" of 'the lever- 19 atanypoint to iand thereby effect a line-spacing 'or stepby-step rotation of the platen. It will be seenthat the pawl 26, which is normally out of engagement with the line-space wheel,

freely in either direction, is swung into engagement with the ratchet-wheel by means of the initial movement of the carriage lever 40, and then drives the wheel and platen around the desired distance.

The line-spacing stroke of the carriage 1e- I ver 40 may be regulated by means of an ad -justable stop 53, having the form of a sleeve f mounted upon the front carriage-bar 1 in "position to be engaged by the upper fork:

nf. the lever, to arrest the same at the completion of the line-spacing stroke, sleeve may be adjusted along the bar, and

p ovided on i PP Side with a proje'ci tion 54, adapted to be inserted in any one of a series of three holes 55 formed ,in a yielding keeper 56, the latter being secured to the carriage bar by a screw 57 and provided at its free overlying end with afingerpiece 58, whereby-it may'beraised clear/of the pin 54; The lever 40 will throw one, two or three line-spaces, according to the adjustment of the sleeve stop 53.

Itwill .be perceived that the spring 35,

i which controls the ratchet-wheel detent,

serves also, by reason of its; connection to to permit the platen to be rotated by hand.

an arm of the lever 19, to return thejlatter to normal position after actuation, together with the sleeve 44 and lever 41. It will be further understood that during thefiiiiea-g.

spacing operationthe swing of the-arm 36' is suflicient to increase the tension-of the spring 35 materially, whereby'the detent roller 33 is pressed with great force against the ratchet-wheel at the completion of the line-spacing stroke; and consequently the increased elfectiveness of said detent at this .momentmay be relied upon to prevent ov.er-

throw of the platen. That is to' say, the

pressure of the detent may be normally so ameter said casing may be equal to or smaller than the platen, so that the paper may pass" around the same as freely as it does around the platen, thereby enabling paper of extra width to be used, or enabling an extra wide margin to be left upon one side of the written page It willbe seen that the sheet may pass entirely around the line-space ratchet- 7 wheel, detent and actuating pawl.

It will be seen that I have combined a reciproeatory lme-spac'e wheel actuator 19 with means for effecting fine (or variable) adjustments of the platen together with the line-space wheel and said actuator,.and means for reclprocatmg the actuator at any posi- .tion to which" it may be adjusted; although the use of the invention is not limited merely to the securing of fine adjustment,;since it is obvious that by turning the wheel 37 the platen, Zwith its appurtenances, may be 1'0- tated through adist-ance equal to many linespace intervals, or as far as desired in either mounted for rotative adjustment about the line' space wheel axis that the 'friction' dedirection; that the line-space pawl 26 is vice 38,39 opposes such movement of said I applied directly to'the platen. to. overcome the opposition of said detent 33 without rotatingthe revoluble head, when fthefspring 35 is in normal condition; thatadevice 44 "pawl; that sufficient rotative force may be is revoluble vwith-said head and movable longitudinally or axially ot the platen by the lever 41 for actuating the pawl26 torojournaled in the platen frame and provided upon the outer side of said frame-i i'tha finger-wheel 37, the platen axlebeingjonrtate the line-space wheel and platen inde pendently of said head; that said -hfea-d is naled' in said head and extending through the same and being provided with a fingerwheel which is beyond said fingerwheel. I

It will be observed that I have combined with a rotary platen having a finger-wheel 6 or 7 two devices ll and 37, having means for rotating the platen, and each operable independently of the other, one of said devices, 4:1, constructed to reciprocate and forming part of a mechanism for'line-spacing the platenonly in forward direction; the other of said devices, 37, constructed to be stationary during the line-spacing operation effected by said reciprocating device 41 and preferably. mounted to turn concentrically with the platen, and connected to the platen for rotating. the same. either forwardly or backwardly through nanylinespaces at a single stroke, thus making the machine especially valuable where widespaced irregular blanks are to be filled, as

Jrocatoiiy line-space wheel actuator, means well as for. other purposes.

.Portions of my improvements may be used without others, and variations may he resorted to within the scope of my invention.

' Having thus described my invention, I claim 1. In a type'writing machine, the combination with a platenand a line-space wheel, of a reciprocatory line-space wheel actuator, means for eliecting fine adjustments of the platen together with the line-space wheel and said actuator, and means for reciprocating said actuator at any position to which it may be adjusted.

In a typewriting machine, the combination with a platen and a line-space wheel, of a pawl for operating said wheel, means, including a finger-wheel, for-etfecting fine rotative adjustments of the platen together with the line-spacewheel and pawl, and

means for driving said pawl at any position to which it maybe adjusted.

3; In a typewriting machine, the combi nation \Vltll a platen, a line-space wheel, and

a spring detent for said wheel, of-a recipforeflecting fine rotative adjustments of the platen together with the line-space wheel,

actuator and detent, and meansftor reciprocating said actuator-at any position to which it may be adjusted.

4; In a typewriting machine, the combination with a platen, a line-space wheel. and a spring detent for said wheel, of a'pa'wl for operating said wheel, said pawl being normally clear of the wheel, means, including a finger-wheel, for efi'ectingfine rotative adjustments of the platen together with the line-space wheel, pawl and detent, means for driving said pawl at any position to which it maybe adjusted, and a finger wheel for rotating the platen independently of the detent and pawl. I

5. In a typewritingmachine, -the combina-- tion with a platen-frame of a platen mounted thereon, a line-space wheel, a line-space pawl mounted for rotative movementahout the line-space wheel axis, a friction device opposing such movement of said pawl, and means, including a lever mounted upon'said platen-frame, tor reciprocating said pawl to rotate the platen step by step.

6. In a typewriting machine, the combination with a platen-frame of a platen, a, line space wheel, a head mounted for-rotation concentrically with the line space wheel, a line space pawl mounted upon said head, a line-space detent also mounted upon said head, and a manually operable part mounted upon the platen frame andefi'ective to operate said pawl.

7. In a t-ypewriting machine,the coml ination with a platten-iraine of a platen, a linespacewheel, ahead mounted for rotation and provided with a finger-wheel, a linespace' pawl mounted upon saidliead, a linespace detent also mounted upon said head,

and a line-space lever mounted upon the platen frame and effective to operate said pawl. v

8. In a typewriting machine, the combination with a platen-frame of a platen, a line space wheel, a head mounted fourotation and provided with a finger-wheel, a line-..

space pawl, a lever upon said head whereon said pawl is mounted, a line-space detentalso mounted upon said head, and means upon the platen-frame for actuating said lever at all rotative adjustments of said head.

9. In a typewriting machine, the combination with a platen -frau'ie ot a platen, a

line-space wheel, a head n-iounted for rotation concentrically with said platen'and linesiace wheel, a fin er-wheel for said head a lever fulcrumed upon said head, a pawl carried by said lever for driving said line-space wheel, and a lever mounted upon the platenf 'ame and effective to operate the first-mentioned lever atall adjustments of said head.

10. In a typewriting machine, the combination with a platen-frame of a platen, a line-space wheel, a head mountedior rotation concentrically with said platen and linespace wheel and provided ,with a fingerwheel rigid thereon, means between said platen-frameand said head for trictionalij opposing the rotation of said head, a lever fulcrumed upon said head, a line-space pawl operated bysaid lever, and a lever mounted upon theplaten-trame and effective to op eratethe first-mentioned lever at all adjust ments of said head.

11. In a typewriting machine. the combi nation with a platen-frame of a platen, a line-space wheel, a head mounted for rotation, means for frictionally opposing the rotation .o;f said head, a finger-wheel 'for rotating said head, a line-space detentupon f'flvfl; -,saidhead,.-alever fulcrumed-upon said head, a. line-space.pawl operablefbysaid lever, a lever mounted upon the platenframe and efiective to operate the first-mentioned lever 5 at all-adjustments of said head, and a fingerwheel for rotating the platen independently of said head.

12. In a 'typewriting machine, the combination with-a platen-frame of a platen, a line space wheel, a head provided with a finger-wheel and mounted for rotation concentrically with said platen and line-space wheel,. a' spring-pressed line-space detent- Z5 tijon'ed "lever at all adjustments of said head.

E13 11 a typewriting machine,the combi- Iii 1316i} with a platen-frameand a platen d" thereon, of a line-space wheel, a iounted for rotation, a line-space pawl -space detent both revoluble together witlrsa-id head, a'lever mounted upon the platen-frame, and a device also revoluble with said head and movable longitudinally of the platen by said lever for actuating said pawl to rotate said line-space wheel and platen independently of said head.

14:. In a typewriting machine, the combination with a platen-frame and a platen mounted thereon, of a line-space wheel, a head mounted for rotation and provided with a-finger-wheel, a line-space pawl and line-space detent both revoluble together a with said head, a lever mounted upon the platen-frame, and a device also revoluble with said head and movable in axial direction by means of said lever for actuating said pawl to rotate said line-space wheel and platen independently of said head.

'In atypewrit-ing machine, the combination with aplaten frame of a platen. a line-space wheel, a head mounted for rota tion and provided with a finger-wheel, a collar mountedupou said head and movable axially thereof, a line-space pawl mounted for actuation by the axial movem nt of said collar, and a line-space lever mounted upon the platen-frame and having 'a part to engage said collar for moving the same in space dctent mounted upon said head, a-

axial directionat all adjustments of said lever also mounted upon said head, a linespace pawl actuable by said lever, a collar v splined upon said head and adapted by an axial movement to operate said lever, and a line-space lever mounted upon the platenframe; one of said collar and line-space lever elementshaving a groove, and the other having-a cooperative projection engaging saidgroove.

17. In a typewriting machine, the combination with a platen-frame, platen and line space wheel, of a head mounted for rotation, a line-space detent upon said head,a lever also mounted upon said head, a sliding spring-pressed pawl mounted upon said lever and normally standing clear of said line-space wheel, and means for operating said lever at all adjustments of said head.

18. In a typewriting machine, the combination witha platen-frame, platen and linespace -wheel, of a head mounted for rotation and provided with a finger-wheel, a linespace detent upon said head, a lever also mounted upon said head, a pawl aotuable by said lever and normally standing clear of said line-space wheel, a lever mounted upon the platen-frame and provided with means for operating the first-mentioned lever at all rotative adjustments of said head,. and means for regulating the throw of said pawl. 9

19. In a typewriting machine, the comloination with a platen-frame, platen and linespace wheel, of a head mounted for rotation and provided with a finger-wheel, means for frictionally opposing the rotation of said 100 head, a spring-pressed line-space detent upon said head, a lever also mounted upon said head, a line-space pawl actuable'by said lever and normally standing clear of said line-space wheel, a line-space lever. mounted upon the platen-frame .and provided with means for operating the first? mentioned lever at'all rotativeadjustments or said head, and an adjustable line-space stop mounted upon one of said platen-frame and line-space lever elements.

' 20. Ina typewriting-machine, the combination with a platen-frame, platen and line? space wheel, of a head mounted for rotation,

a line-space detent upon said head, a line space pawl revoluble with, said head and normally standing clear of the line-space 1 vwheel, a lever mounted upon the platent'ramc, a device also revoluble with said head and movable in axial direction by means of 129 said lever for actuating said pawl to rotate said line-space wheel, and means for regulating the throw of the lever.

21. In a typewriting machine, the combination with a' platen-frame, platen and linespace wheel, of a head mounted for rotation concentrically with the platen and provided with a finger-wheel,means for frictionally opposing the rotation of said head, a springpressed line-space detent mounted upon said 130 head, a lever also pivoted :upon said head 'and provided with a sliding spring-pressed pawl 4,3 collamsplinedj upon said head and hav g a pm'-and-slot connection with an arm 'ofsaidlever, and a line-space lever ful- "crumed at its rear end in rear of said headand projecting forwardly from theplaten- 'fram'e'and having between its ends a pin- .and-slot connection with said collar.

22. In a typewriting'machine, the combination withva platenrframe and platen, of a head journaled in the platen frame, a platen axle 'journaled withinth'e head, a line-space -detent mounted upon said head, ajline-space pawl also carried by said head, means for actuating said pawl, and a finger-wheel for said head.

' 23. In altypewriting macliine, the combination with a platen-frame, platen andli'ne space. wheel, of a head journaled in the.

platen frame, a platen axle j'ournaled within the head, anoperating-wheel upon said head outside ofthe platen-frame, a line-spacede- ,tent' and line-space pawl both carriedby said head within said platen-frame, and means, including a lever mounted upon the platen-frame, for actuating said pawl atall said head, a

space wheel, of a head journaled in theplaten frame, a platen axle extending through space Wheel, of

adjustments of said head. e

1-24. 'In atypewriting 'machine, the combination with a platen-frame, platen and linespace wheel, of a tubular head'journaled in the platen frame, a' platen axle extending within said head, an operating-wheel l pon g said'head outside of the platen-framameans for frictionally opposing the ,reta'ti'on'- of carried by said head within said platen-frame, a collar mounted within said platen-frame for rotation with said head, a

lever mounted upon the platen-frame andhaving a part for engaging ,said collar to slide the same axially, and means for enabling said colla'rby its axial movement to actuate said line-space pawl. 1

25. In a typewriting machine, the combination with a platen-frame,platen and linesaid head and provided at its'outer end with a finger-wheel, a finger-wheel -for rotating said head, a line-space pawl and line-space detent'both mounted upon said head, and a manually operable member mounted upon the platen-frame and efiective' to actuatesaid pawl.

26. In a typewriting machine, the combination with a platen-frame, platen and linea head journaled in the platen-frame and provided upon the outer side of said framewith a finger-wheel, a'platen axle extending through said head and provided atits outer end with a finger .wheel whichis beyond ,the first-mentioned fingerwheel, a line-space pawl and line-space detent both mounted upon said head within ing rotative line-space detent and line-space I the platen-frame, and'means for actuating said line-space pawl.

27. In a typewriting machine, the combination with a line-space ratchetwheel and a platen,'ofa spring-pressed detent engaging sald over the teeth thereof, and meansgfor effectadjustment ratchet-wheel together about the axis of the rotatable wheel.

28. In a typewriting machine,'the combi-' ratchet-wheel and adapted to slip of said detent-j and j nation with a line-space ratchet wheel andv a platen, of a spring-pressed detent engaging said ratchet wheel and adapted to yield ingly hold the sam' against .rotatiommeans forefi'eeting rotative adjustment ofsaid detentand ratchet-wheel together, and a linespace pawlalso rot-atively adjustable with said ratchet wheel.

2.9. In a-typewritin machine, the combination with a revolubIe platen, of a handle,

mechanism operated by the handle for im parting a f-ttGP-bY-Stfip rotation thereto, and means for efiecting fin'e rotative adjustments of the platen together'with said mechanism.

30. In a typewritihg machine, the-combination with a revoluble platen, of a handle, mechanism operated by the handle. for imparting a step-by-step rotation and for detaining theplaten at the completion of each step-by-stepj rot-ative movement, and means nation with a platen, a line-space ratchet wheel, a pivoted detent, and a spring for said detent, of' means for temporarily increasing the tension of said spring at the completion of the line-spacingmovement of the platen.

-- to the rotation of the platen by said finger-' wheel, mechanism for effecting step-by -step for, 'efiecling fine rotative adjustments of the platen together with said'mechanism. I 31. in a .typewriting machine, the combia typewri-ting maehine, the combirotation of the line-space wheel and platen and for preventing overthrow of theplaten, said mechanism being inclusive of a linespace pawl which normally stands clear of the line-space wheel. a lever for actuating said mechanism. and adjustable means for regulating the throw of the line-space wheel and platen; said-platen being revoluble .to-'

- gether with said line-space wheel, said detent and said rotation mechanism.

34. In a typewriting machine, the combination with a revoluble platen and a linespace ratchet wheel, of a. finger -wheel for roiso ,tating said platen, a detent engaging said ratchet wheel and offering light resistance to platen; said platen being revo'l'uble together- -with said line-spacewheel, said detent and said rotation-mechanism.

Inatypevvriting machine, the combination With a revoluble platen and a line-- space ratchet Wheel, of a finger-Wheel for rotating said platen, a' spring-pressed de- -tent engaging said ratchet wheel and ottering light resistance to the' rotation of the platen by said finger-Wheel, and mechanism for effecting step '-by step rotation of the line-space ivheel and simultaneouslyincreas ing the pressure of said detent; said platen being reroluble together with said-line-Yspace wheel and detcnt. r 1

"6. In a typewriting machine, the combination with a reroluhleplaten anda linespace ratchet Wheel, of a finger-wheel for rotating said platen, a spring-pressed detent engaging said ratchet Wheel and offering light resistance to the rotation of the platen" by said iinger-w'lmel, a line-space'pawl normallyclear of said ratchet Wheel, means for actuating said-pawl and simultaneously increasing the pressure of said-detent, and means for effecting tine rotative adjustments of saidplaten together with said. line-space wheel, detent and pawl.

"3'7. In a typewriting machine, the combi nation; with a revoluble platen and. a linespace ratchet Wheel, of a finger-wheel tor rotating said platen, a spring-pressed detent engaging said ratchet Wheel and "oiiering light resistance to the rotation of the platen by said finger-wheel, a. l1ne-space pawl normally clear of said ratchet Wheel, a linespace lever mounted naon the platen-frame and effective to actuate said pawl, means controlled by sa d lever for increasing the pressure of said detent, and means, includmg a finger. Wheel, for effecting fine rotative ad ustments of said platen together with said line-space wheel, detent and pawl, and

means at said le -er for variably arresting.

the same in its platen-rotating stroke.

In a typewritin-g machine, the combination with a. revoluble' platen and a line space ratchet wheehof a finger-wheel for rotating saidplaten, a detentengaging said ratchet Wheel, aspring pressing said detent lightly against said ratchetwheel, a lever mounted upon the platen frame, andmeans I between said lever and said ratchet-Wheel for intern nttently rotating-the latter, said rotating means being normally disengaged from said ratchet wheel, and said leper lie-- mg returned to normal position by said sprlng, 1

-- 39. In a typewriting machine, the combi-- nation With a platen -frame, a revoluble platen and a line-space ratchet Wheel, of a finger-wheel for rotating said platen, a detent engaging said ratchet Wheel, a sprn lg pressing said detent lightly against said ratcl1 et wheel, a lever mounted upon the platen-frame, means between said lever and ingthe latter, said rotatixigflneans being normally disengaged from sald ratchet said spring, and-means, including a fingerwheel, for efiecting fine'rotative ad ustn'ients means.-

y r 40. In a typewriting maclnne,the combination with a platen-fram a revoluble tent, a spring pressing said detent lightly against said ratchet Wheel, a revoluble head where'on said detent lS '1l10llI1t(l, a finger- Wheel for rotating said head, means for frictionally opposing the rotation of' said head, 7 a lever connected to said spring and mounted on said head, a pavvl'mounted upon said lever and normally free. of said ratchet heel. and a lever mounted-upon the plateni'rame for actuating the first-mentioned lever at any position to which said head may ,be adjusted, and provided withstroke-regulating means.

41; In atypewriting machine, the combination with a. platen. and a revoluble head, of means upon said re'voluble head tor-effecting intermittentrotation oft-he platen, said rotating means including a pawl, and a lever mounted upon the platen-frame and adapted to operate said -platen-rotating means atall. be rotated.

42. In a typewriting'machine, the combination with a platen of a rcvoluble head, means, including a pawl reciprocable upon said head and adapted to effectintermittent rotation of the platen, and a member mounted upon the platen-frame and movable axially of said revolublehead. and adapted "to actuate said pawl. j

43. In a type vriting machine, the combination with aplaten of a revoluhle head,

rocablej upon said head, for effecting intermittent l ne -spac1ng movements of the platen, a member mounted upon the platenhead, and adapted to-actuatesaidpawl, and means for automatically preventing overthrow of the platen at the line-space operation. 3 j i at}. Ina typeivriting-machinefiche combitnation with a p a'tenframe of a platen, a l line-space Wheel, a head mounted for rotasaid ratchet-Wheel for intermittently rotatof said platen-"together with said line-spacewheel, qcletent and interm ttent rotatingplaten and a line-space ratchet wheel,- of ,a finger-Wheel for rotating the platen,a depoints to which said head may frame, and movable axially of said revoluble' Wheel but engage-able therewith, and said A lever being returned to normal position bymeans} includinga line-spacingpawl recip- 1 provided with. a finger-wheel, a line-space pawl mounted upon said head, a line-spac also mounted upon said head, a said. head, ratchet-Wheel, pawl ing detent casing for and detent, and 'hneespac ng lever mounted upon the platen frame and effective tooperatesaid pawl;

46. Ina typewnting machine, thecombinationwith a'iplate-n-fra'me of "a platen, afinger-wheel therefor, a line-space wheel, a head mounted for rotation concentrically "with said platen and provided with afinger line-space lever, of means for making eithercoarse or fine ndpistments of one of said elewheel, 'a platen aule extending through said head, a line-spacing pawl mounted upon=1- said head,'a'line-spacing detent also anna ed upon said head, a ii ylindrical-casing for said head, pawl and detent, said-casing not?) exceeding the diameter .of the platen, and a line-spacing lever mounted upon the platen frame and effective to operate said pawl.

tation in the platen frame, a finger-wheel rigid with said head, a platen axle extend ing through said head and finger-wheel and hearing at its outer enda fingebwheel, alme-spacing pawl mounted upon said head,"

a detent also mounted upon said head, a line-spacing lever imounted upon the platen-frame and ett'ective to operate said pawl, and a'brake forsaid head.

4-8. he combination with a platen and a ments relatively to the other, andan inter vening' line-space wheel and devices operated by said lever to turn, said wheel; said wheel and turning devices being adplstable as a mass together with said ad uStable element.

4.9. The combination with a platen frame, of ,a stop adjustable thereon to secure difi'er-' ent throws of the line-spacing mechanism, a

line-space lever to engage said stop, a platen, a line-space wheel, a detent, and means for adjustinglsaid detent'and line-space wheel and platen to an unlimited extent altogether independently of said'leverand'stop.

50. In a platen line-spacing mechanism.

. -the combination with a platen, and a toothed line-space wheel, of a drive-pawl mechanism and a line space detent normally engaging '.VOlVB about the platen axis at the l1ne-spac.

rotfai 47. In a typewriting machine, 'thegcombi wiih ga 1 .nation witha plateneframe. and platen of a' line-spacing wheel, a head mounted for;ro-

, frame.

said wheel and both mounted to 'reing "operation;- .said detent normall y* statiOnar'y during. therevolut'ionofnthe platen.

' '51.; Iniafp' ten mechanism, a line-space detent revoluble with the platen about the axis of the lat-ter,-and'.norn1ally in engagement with a line-space wheel, in combination with a friction device for holdin'giitwhere adjusted; said detent normally sta; tionary duringthe revolution of the platen. 52'. Ina platen mechanism, a finger-piece.

and a .line-space-fietent revolubly-adjustabl'e to an unlimited'extent. aboutthe platen axis by means of saidj-finger-piece and normally a in engagementwith a line-space wheel said;

detent normally stationary during the revolution of the platen. j

53. The combination plate twoeoijperati'nglevers, as 412 and 19, of means for eifecting rotatiue eraterotatiive lever. i

- 54 ,The'x combnat on with a cylindrical 'rmeansenabling it to beturn'etl hrough. eq

set;

tiona- 'po tionduringthe ordinary'rotawith a revoluble I p p p H I adjustment of one ofjsaid' leyers about t-heplaten axiswhile the other-lever lnay allways opiual line s'pacing" intervals and .hcildinggit'where set, the holding means also 7 le" either with or withoutthe platen, movable regularly-bye lever wherever j Q55. A..i"evoliiblej platen .in combination "space detent which has a ,s'tat'ioi i'e t ten, .and which is revoluble'to an jnnl tent with the platen.

56 In. writing machine, the combination W1 hi a revo luble line sp'aee wheeh'of a frame revolubly' adjustable aboutthe axis of said wheel, a brake orthe like'to' hold said frame stationary during the revolution of the wheel,.. line-spacing mechanism on said frame, and means for adjusting the 57.- In a typewriting machine, the combi-- nation with a platen and a platen 'Eramqof a V-shaped lever, as 19, pivoted on an axis transverse to the platen'axis and'embracing' the platen axle, apawl on said lever, and a lever upon 'theplaten' frame having means to operate the first lever. i

58. The combination with a finger-wheel, as 37, and a platen revoluble by said lingerwheel, of an intermediate. line-space driving pawl mechanism revoluble with the platen.

59. The combination'with-a platen, and a line-space drive-pawl mechanism'revoluble therewith, of a. leverupon the to operate .said mechanism.

' 60. The combination with a platen, and a line-space drive-pawl mechanism. revoluble therewith, of a lever upon the platen frame to operate said mechanism, and means upon. the'platen frame for regulating thelstroke of the lever. i

platen frame l," and a normally disengaged therefrom, but revolubly' adjustable there With,. and' capable of operating. at: any point in the revolution of the platen,

' 62..-,The combination with a platen and ,platen frame having from bar, of slide upon said bar, a yieldlng detent'to hold said slide inlany-of three positions, and a line- U; space lever mounted upon the plate11.fra1ne andhaving means to operate the platen and 'ai'rest'able by 'said slide.

- In aetypewriting machine, the combi-' miti'on' with. a, platenand a platen frame, of

il l'glever forked toembrace the platen frame haying a pin, a collar sliding upon the platen axlej and groove gto engage the pin,

" he, platen. j

564; In atypewriting machine, the combinationavith a platen and a platen frame, oi

aline'spa'ce wheel connected to the platen, :acOlla-r on'theplaten axle having a cross head, a Li -shaped lever-hinged upon the cross @Fihead and'having a pawl to engage the to Operate said linespace wheel, a spring-cheek 0r detent,

one said wheel and detent elements .mounted on the platen and the other on said. head, and a finger wheel on said head.v

in typewriting inachine,-'the combinationwith av llXlG--Sj i);.-1CG ratchet wheel and a platen, of a spring-pressed detent engagfor efiecting'rotative adjustment of said detent and ratchet wheel together through strokes each equal to many linespace inter- "-vals, anda line-space pawl also rotative.

with said ratchet wheel. 4

jGZLj-In a typewriting machine, the combi- I nation with a reyoluble platen, of mecha- A y: combination 'aj revoluble line-space ind-means operated the collar for rotat-' ing said ratchet wheel and adapted to yield-' finglyhold the same against rotation, means.

nism for in1partinga 'stepby step rotation thereto, and means to e'ifecting strokesvof the platen together with. said mechanism through a stroke equal to many line space intervals and back to initial position.

68. In a typewriting machine, the coinbi nation withaplatenand a platen frame, of .55

a head mounted for revolution in the platen frame, the platen fiavlng an axle extending through the head, a manually rotatable deyice upon an end of the head that projects,-

from the platen frame, and a brake for prevent ng accidental rotat on of said head, a

line-space ratchet wheel, and a detent beingprovided between s'aid'head andthepla'ten to enable the head to rotate the platen. 69. The combination with a rotary 'platen not having afinger wheel, of two devices 'having means for rotating the platen and each operable independently of the other, oneof said. devices constructed to reciprocate and forming part of a HIECllflIllSnlfOI' line-spacand the other ofsaid devicesconstructed to be stationary during the line-spacing operation effected by said reciprocating ClQVlC, and connected to the platen forrotating thesame both forwardly. and backwardly,

through-many line-spaces at asingle stroke.

70. The combination with a rotary platen havinga finger-wheel, ottwo dev1ces-hav-' 111g means tor rotating the platen and each operable independently of the other, one of said devices constructed to reciprocate and .ing the platen only ,in forward direction,

forming part of a mechanism for'lineespacmg the platen only in forward d1rect1on,

and the other of said devices constructed to be stationary during the line-spacing op'eration effected by said reciprocating device and mounted to turn concentrically With the platen and connected to the platen for rotating-the same-both forwardly and backwardly, through many line-spaces ata single stroke. a BURKE-LAM- C. STICKNEY.

ll 'itnesses PAUL Scrum), F. Bt'nriLon.

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