US929840A - Type-writer. - Google Patents

Description

G. W. DONNING.

TYPE WRITER.

APPLICATION FILED IEB.1,1906.

Patented Aug. 3, 1909.

5 SHEETS-SHEET 1.

"G. W. DONNING.

T E WRITER. APPLICATION FILED FEB. 1, 1906.

Patented Aug. 3, 1909.

5 SHEETS- SHEE'I' 2.

G. W. DONNING.

TYPE WRITER.

APPLIOATIOK FILED rm. 1, 1906. 929,840, Patented Aug. 3, 1909. ESHEBTS-SHEET-3.

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TYPE WRITER.

APPLICATION FILED FEB. 1, 1906.

' 9295840 Patented Aug. 3, 1909. 6 SHEETS-SHEET 4. 1' W 4/ 64 llll I HIIHIHI fiLj Qbfommu V G, W ONNING. TYPE WRITER.

ARPLICATION FILED FEB.1,1906.

293% Patented Aug. 3, 1909.

5 SHEEN-SHEET 5.

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UNI ED STA'I1 E PATENT OFFICE.

GEORGE W. DONNING, OF'STAMFORD, CONNECTICUT, ASSIGNOR TO HARRY T. AM BROSE,

' OF ORANGE, NEW JERSEY.

TYPE-WRITER.

Specification of Letters Patent. Original application filed April 26 1902, Serial No. 104,842. Divided and this application filed February 1, 1906.

Patented Aug. 3, 1909.

Serial No. 299,022.

To all whom it may concern:

Be i known that I, GEORGE W. DONNING, a citizen of the United States, residing at Stamford, in the county of Fair-field and State ofConnecticut', have invented certain new and useful Improvements in Type- 'Writers and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to Which itappertains to make and use the same.

This invention relates to fiat-platen writing-machines, and its object is to produce certain improvements in. the supporting or carriage portions of such mach-mes and to rovide means for permitting and effecting me longitudinal adjustment of the part of such a machine which moves longitudinally under the control of suitable feed-mechanism for the purpose of line spacing.

In the use of machines of this character it would fre'quently be desirable to be enabled to imprint characters between the lines of Writing determined by the feed mechanism. Such machines; too, are largely employed for making up bills, and for Writing in blanks of various descriptions, in which event the entries are made at various times and the work must be placed upon and removed from the platen repeatedly before the writing is comleted. Under such conditions, it is obvious that there will necessarily be considerable difficulty attendant upon replacing the work sheet in exactly the same position longitudinally of the platen, and that if the work is not positioned exactly in this manner faulty al-inement will result. To satisfy these two classes of requirements, one feature of the invention contem lates the provision for a longitudinal shi ting of the writing mechanism over the platen distinct from the ordinary step-by-step line spacing movement governed by the feed mechanism. In one aspect this feature of the invention may be said to consist in means for positioning the writing mechanism for inter-line writing; and in another aspect it may be looked upon as constituting means for effecting fine longitudinal shifting of the writing mechanism relatively to the laten.

A closely allie feature of novelty in the invention is the provision in connection with As a simple and efficient mode of bringing about the adjustment of the Writing mechanism, I propose to provide means for producing fine longitudinal shifting of the line spacing racks by means of which the writing mechanism travels over the platen with its ste by-step movement. I also pro ose to mare such means self-retaining, so t at the racks, and therefore, the writing mechanism, will be secured in the longitudinally shifted position. v r

The line spacing racks form part of the longitudinal track rails upon which travel standards carrying the writing 'mechanism; and a further feature of the invention resides in the particular construction of these tracks whereby proper longitudinal travel of the Writing mechanism is insured.

In the drawings: Figure 1 is a side elevation of a complete writing machine embodying the present improvements; Fig. 2 is a view looking toward the lIlSKlOOf the feed] mechanism casing; Fig. 5 is a horizontal section through, the casing; Fig. 6 is a vertical transverse section through the longitudinal feed mechanism and the underlying track; Fig. 7 is a detail of the rigid and loose dog lates; Fig. 8 is a detail bottom plan of the iine finder Fig. 9 is a vertical longitudinal section through one of the tracks at its pivotal point; Fig. 10 is a side elevation, partly in section, of the forward part of the track frame and the adjusting devices; Fig. 11 is a section on the line 11'1-l, Fig. 10; Fig. 12 is a side elevation showing the. rear mounting of a non -tiltabl'e track rail; Fig. 13 is a permechanism, mounted to travel laterally for iettcr spacing by reason of being hung by rollers c from uides d connecting standards el longitudinally upon the track rails to impart to the writing n1echanism the required line-spacing movement. Each standard D is provided at its base with peripherally grooved rollers c", which run upon a longituduurl, rounded rib or trackway a pro ecting upward from rail B and disposed adjacent to and outside of rack 12. Each track rail is further provided with an outward extending horizontal flan e 2*, against whose under surface work. rol ers f mounted on stub shafts g pro'ecting inward from a depending flange it which is formed on the bottom of standard D and projects below track flange c. It willbe recognized that owing to the standards having bearing upon both upper and lowersurfaces of the track a much more even movement of the standards, and therefore of thewriting mechanism, is insured than were the standards to travel on the tops of the rails only.

Referring now more particularly to Fig. 8, it will be seen that a line finder F is slidably mounted upon the lower surface of base plate 76* of the writing mechanism The finder has a projecting pin 1* which works in slot m formed in an operating lever n piv' oted at of to plate k When lover a is turned in one direction as far as permitted by slot m indicating tip p" at the end of the finder is positioned immediately behind the printing point. When the hand of the op erator is removed. from lever n, a spring g returns lever and finder to normal position.

Each standard D is provided Within a casing on the inner face thereof with a pinion cr" meshing with the corresponding line spacrack c,- and these pimons are connected by a shaft 5 to which they are rigidly secured. Within one the casings is a rigid dog plate carrying rigid dog c and mounted for longitudinal reciprocation within the casing; and f is a loose dog plate mounted on the rigid dog plate to move therewith, and also having an independent movement about shaft 5 the-loose dog being indicated at The loose and rigid dogs ooo crate with the ratchet wheel F2! rigid with s aft 6 there being a spring k disposed so as normally to maintain the loose dog in engagementwith wheel 7& and the rigid dog: out of engagement therewith, anda second spring m tending to turn the loose dog plate upward about shaft 6 A lever 71, pivoted within the casing is pr'ovided with a slot p which receives a stud Q3 depending from the rigid dog plate and affords means for reciprocatingjthc plates (i and f it being obvious that it is immaterial to the present invention whether such actuation be manual or automatic. When the loose and rigid dog'pla'tes are shifted to carry the loose dog out of engagement with wheel a and the rigid dog into engagement therewith, the ratchet wheel is practically unaffected, While the loose dog plate and loose pawl, under the actuation of spring m move upward past a cer tain number of teeth on the ratchet wheel, the exact number of teeth so passed over be ing determined by a spacing regulator 1* pivoted above loose dog plate f and having detaining faces 5 and The face 8 is disposed to engage with plate f when regulator 1* is in its lowest position, to stop the plate after the loose dog has moved upward a distance corresponding to a single line space. When the spacing regulator is lifted a certain distance, face t is in position to arrest plate f after the latter has moved twice as far as before, whereby double spacing is provided for; and in like manner other forms of spacing may be secured. Loosedog 9 having been moved up a certain distance about the eriphery of the wheel the parts are now alowed to return to normal position, the rigir'l dog passing out from the ratchet teeth, and the loose dog passing into engagement thereitli, 'but higher up than normally. A driving spring o connected at one end to pinion a, and at the other to a pinion of loose on shaft 1) now turns the pinions a a distance corresponding to the number of ratchet teeth 'over which the loose dog passed in its idle movement, and the turning of ratchet Wheel 71 returns the loose dog to normal or lowest position, where it locks th s parts against further movement. A lantern wheel a may be provided for rotating pinion w" to regulate the tension of the driving spring, the lantern -wheel and pinion being designed to be selflooking so as to secure the spring against un- Winding except by reason of the longitudinal travelof the Writing mechanism.

The feed mechanism just described forms the subject-matter of my co-pending application for patent,-Serial No. 104,842, filed April26,1902, and patented July 17, 1906, as No. 826,483, of which the'present application is a division; and -it is, therefore, notnow claimed specifically. I It will be recognized that this form of feed ing mechanism is but one of a large number of feed mechanism providing for manual or spring-actuated movement of the writing mechanism over the platen, any one of which might be employed in connection with the present improvements. v

Referring now more particularly to Figs. 1, 2, and 9-11, at the front of table A is disposed a transverse plate eand at the rear is another plate f. Upon these plates rest the track rails B. The latter, in Figs. 1, 2 and to the rear of their longitudinal centers-.by

this means providing for a counterbalancing of the track frame by the traveling ma chine-with hinge members 9 to which they are slidably secured by enlarged headed pins h projecting downward from the lower faces of the rails and occupying longitudina slots 11 formed in the hinge members. Each hinge member 9 is pivoted at 7c to a complementary hinge member 1 secured to the plate f, whereby tilting of the track rails is provided for. At their front ends, the tracks are furnished with a depending flange member m, which slides upon plate e and maintains the tracks in a horizontal lane, The plate e has formed at its forwar edge an upstanding flange n, through which is threaded a longitudinal adjusting screw 0, having a milled operating head p. At its rear end, thescrew 0 is not threaded, but is provided with a -cir eumferential groove g; and this end is swiveled within an adjusting block 1", by means of a pin 8 which is mounted in the adjusting block and which takes into the groove q.'

Said adjusting block is slidably mounted on plate e, and is provided with a transversely dis osed neck sf, the distancetbetween whose W ls, except at the top, is just equal to the thickness of the flan e member m of the track rails. At the top, the walls of-the neck flare outward and upward, so as to form beveled or inclined guiding faces t. Neck 8 of the adjusting block is designed to receive a downmounted ontheir support.

ward opening slot it formed in flange memberm, so that when the track rails are. in normal position they, and the writing mechane ism, may be shifted back and forth by means of the adjusting screw 0, the slotted connection of the tracks with the hinge members 9 permitting such sliding or adjusting. ovement. A screw 6 on the adjusting block cooperates with a slot 0; in plate e. It will be understood, of course, that any suitable form of adjusting device may be used in connection with the track rails without affecting the fundamental conception underlying this invention.

While, of course, it is not essential that the track rails shall be tiltable, yet I regard it as one of the subordinate features of novelty of the present invention to provide tracks which are both slidably and tiltably But, in order to prevent the tracks, when raised, from sliding rearward, it becomes necessary to provide locking means for the rails operative-when the latter are swung u out of engagement with the adjusting bloc r. In Fig. 9, more especially, 1 have. illustrated one form of such lockin ;means. Accordin to this constructlon, t eunder-surfaee- 0 each track,

adjacent its hinge member g, is cut away so asto, form adownward openingchamber 1;, hfifiifhwh is; pivoted a-paw w. whose: working tipqsdesignedrto engage with the teeth or? a;

racks; formedwonthe top: ofthe hinge membet; 9. Said racle and pawl are arranged. to.-

qfik he traek. against i'earward= movement, and! .1.1 the shapeof astud' y depend;

position.

ing from the awl intermediate its pivot and tlp, 1s provi d for automatically removing the pawl from engagement with .the rack when the tracks are swung downward into normal position. As. will be readily under-- stood, this stud y is of sufficient length to contact with plate f before the tracks are all the way down, thereby holding the pawl against further downward movement, while the rack continues to move downward till it is freed from the pawh Gravity may be depended upon to cause the automatic engagement of whose inclined guiding faces 25 direct the' flange member m of the tracks into the neck 3 whereby the tracks are returned to exactly the same position that they occupied before tilting. It will now be-seen that operating screw 0 and its related parts constitute one embodiment of means for effecting longitudinal shifting of the trackv rails, and therefore of the writing mechanism, back or forth to any point within a certain range, this range being determined by the length of the slot at, though it will be apparent that it might be determined by the length of the threaded portion of the operating screw.-

Further, it will be seen that this longitudinal adjustment of the writing'mechanism may be performed either at the outset of writing,

to adjust thepositions of the lines of writing to the spaces in apiece of work, or at-any one of the points of rest governed by the feed mechanism, for the purpose-of permitting. interlineations. Both of these results I regard as broadly new achievements in the art.

From still anotherpoint of View, the partsnear thepivotal points of the track rails may be regarded as means for permitting the longitudinal adjustment of the-writing mechanism, while the adjusting screw serves to retain the writing mechanism in any adjusted Or the screw and its correlated parts. may be looked upon as constituting means for both adjusting and retaining thetrack rails. It may also be proper, before passing on to the claims, to point out that the cooperation, of the line finder F withthc adjustable track rails is a. very important one,

since the finder moves-With the writing mach-e anism, as the latter is: shifted by the movement of the rails, and, when progectedfor ward to. theprinting point, indicates teth'e operator when operating; screw 0 has been i turned to the proper degree. I

'takes the place of platef described in connection with the tiltable mounting for the tracks. It ill be apparent that locking pawl w and rack are notpresent in this construction and that the same form of 'ad ust ing device may be employed as formeriy.

What is claimed as new is:

1. In a typewriter, the combination with flatlaten, an overlying traveling writingniec ianism, track-rails upon which the writing-mechanism is supported, and feed-mechanism for imparting to the writing-mechanism a longitudinal step-by-step line-spacing movement of the writing-mechanism on said track-rails relative to the underlying platen, of manually operated screw controlled means acting directly on the rails to effect minute movement thereof in either direction longitudinally of the platen and for a distance less than the regular line-spaces. 4 a 2. In a typewriter, the combination with a flat-platen, track-rails arranged adjacent the platen, a traveling writing-mechanism supported on said track-rails and arranged to travel over the platen laterally and longitu dinally, and feed-mechanisms for impartin to the writing mechanism a longitudina step-by-step movement of the-writing-mech anism on said track-railsfor line spacing, of manually-operated screw-controlled means acting directly on the rails to effect minute movement thereof in either direction longitudinally of the platen and for a distance less than the regular line-s aces.

3. In a typewriter, t e combination with a flat-platen, track-rails arranged adjacent the platen, a traveling writing-mechanism supported on said track-rails and arranged to travel over the platen laterally andlongitudinally, and feed-mechanism for imparting to thewriting --mechanism a longitudinal step by-step movement of the writing-mec anism' on said track-rails for line-spacing, of manuallyroperated screw-controlled means acting directly on the rails toeffect minute movement thereof in either direction longitudinally of the laten and for a distance less than the regu ar line sp'aces, and means for retaining said rails 'in such shifted position. 1

4. In a' typewriter,the combination with a flat-platen, track-rail members arranged adjacent thereto, and a traveling writing-mechanism su ported'by said track-rail members and over ing the platen, of means for efiecting full ine-spacing of the writing-mechanism over the platen, manuall operated screwecontrolld means acting irec'tly .on 7

the rails at the front to effect minute longitudinal movement thereof and of the writingmechanism in either direction relative to the platen and for less than the regular linespaces and for interline-writing.

5. In a typewriter, the combination with a flat-platen, track-rail members arranged ad- -overlying the platen, of means fo effecting full line-s aeing of the writing-mechanism over the p aten, a manually-o erated screwcontrolle device acting direct y on the. railmembers for positioning said rail-members, with the writingmechanism for interline writing in either direction relative to the platen, and means for maintaining the rail of the writing-mechanism on said trackrails, of a manually operated screw controlled interline-shifting device acting directly on the rail-members'and operative at feed-mechanism for shifting said rail-memplaten and intermediate of the regular linespaces in either direction. A i I 7. In a typewriten the combination with a fiat platen, an overlying writing mechanism, and feed mechanism for positioning the writing mechanism over the platen for imprinting successive lines of writing, of manually-operated screw-controlled interline-shifting means for imparting to said writing mechanism a fine longitudinal shifting in either direction relative to the platen and distinct from the line spacing movement.

8. In a typewriter, the combination witha flat platen, an overlying writing mechanism, and feed mechanism for positioning-the writing mechanism over the platen for imprinting successive lines of Writing, of manuallyoperated screw-controlled interline-shiftmg means distinct from said feed mechanism for imparting longitudinal adjustment to said writing mechanism in either direction relative to the platen.

9. In a typewriter, V fiat platen, an overlying writing mechanism, and feed mechanism-for positioning the wr1tsuccessive lines of writing, of manna y-operated screw controlled interline shifting means distinct from said feed mechanism for eiiecting longitudinal adjustment of said writing mechanism in either direction relajacent thereto, and a traveling writing-mech anism supported by said rail-members and members and writing mechanism. against mechanism for effecting regular line-spacing bers and writing mechanism relative to the tive to the platen and for retaining the same the, several points of rest governed by said i the combination with a ing mechanism over the platen for im rinting position against longitudinal ing, of manually-operated screw-controlled interline shiftin means operable the successive points OI rest governed by said feedmechanism for effecting longitudinal shifting of the writing mechanism in either direction relative to the platen.

11. In a typewriter, the combination with a flat platen, an overlying writing mechanism, and feed mechanism for-imparting to said writing mechanism a longitudinal stepby step line spacing movement over the platen, of manually-operated screw-controlled interline-shifting means operable at the several points of rest in such longitudinal movement for effecting fine longitudinal back or forth adjustment of the writing mechanism relative to the platen.

- 12. In a typewriter, the combination with a flat platen, an overlying writing mechanism, and feed mechanism for positioning the writing mechanism over the platen for imprinting successive lines of writing, of selfretaining manually operated screw --controlled interline-shifting means distinct from the feed mechanism for effecting longitudinal adjustment of the writing mechanism in either direction relative to the platen.

13. In a typewriter, the combination with a flat-platen, and line-spacing racks adjacent to, and manually-controlled screw-operated longitudinally-adjustable in either dlrection with reference to, said platen.

14. ,In a typewriter, the combination with a flat platen, of line spacing racks, and handcontrolled screw means for effecting longitudinal shifting of said racks in either direction relative to the platen. '15. In a typewriter, the combination with a fiat platen, of line spacing racks, manuallyoperated, screw-controlled means for effecting longitudinal adjustment of said racks in either direction relative to the platen, and means. for retaining the racks in shifted position.

16. In a typewriter, the combination with a fiat platen, of line spacing racks, and self-retaining manually-operated, screw-controlled ,means for effecting fine longitudinal shifting of said racks incither direction relative to the platen.

17. In a typewriter, the combination with a flat-platen and a support, of line-spacing racks disposed at the edges of said platen, tiltable away from the same, and slidablymounted on said su port and minutely-adjustable longitudina ly and independent of Sfil'il platen.

18. In a typewriter, a support, tiltable line-spacin racks, and screw-operated means for minute y-adjusting said racks longitudinally of the support.

' 19. In a flat platen typewriter, the combination of a support, a flat platen, track rails mounted tiltably and longitudinally slidably on said support, minute y-operating means for slidably-shifting said rails, and means for securing said rails at the desired longitudinal position.

20. In a typewriter, a support, line spacing racks tiltable thereon, and minutely-adjusting, screw-operated means for effecting longitudinal adjustment of said racks.

21. In a typewriter, a support, line spacing racks tiltable thereon, minutely-ad usting, screw-operated means for permittin fine longitudinal shifting of said racks, an

means for securing the same in shifted posi tion.

22. In a fiat laten typewriter, a support, line spacing raclis, means for connecting said racks tiltably to the support, and minutelysh-ifting, finger-operated means for effecting longitudinal adjustment of said racks and for securing the same at the desired degree of adjustment.

23. In a flat platen typewriter, longitudinal line spacing racks, means for permitting tilting thereof, means for effecting fine longitudinal adjustment of the racks, and means operative when the racks are raised to lock t e same against rearward movement.

24. Ina fiat platen typewriter, tiltable and longitudinally slidable hne spacing racks, means for effecting fine longitudinal shifting thereof, and means 0 erative when the racks are raised to lock t 1e same automatically against rearward sliding.

25. In a flat laten typewriter, tiltable and longitudina 1y slidable line spacing racks, self-retaining means for effecting fine longitudinal shifting thereof, and means o erative when the racks are raised to lock t e same automatically against rearward sliding.

26. In a flat platen typewriter, tiltable line I spacing racks, means for permittingfine longitudinal shifting thereof, means for securing the racks against longitudinal shifting when in normal position, and means 0 erative when the racks are raised to 100K the same automatically against rearward shiitspacing racks, means for permitting fine longitudinal shifting thereof, means operative when theraclis are raised to lock the same automatically against material rearward movement, and means operative when the racks are returned to normal positi n to V exactly re-position the same.

28. In a flat platen typewriter, tiltable and longitudinally slidable line spacing racks, means for effecting fine longitudinal shifting thereof, means operative when the racks are raised to lock the same automatically against material rearward movement, and a guide disposed .to automatically return the racks to exact position when lowered.

29. In a fiat platen typewriter, tiltable line spacing racks, means for permitting fine longitudinal shifting thereof, means for securing the racks in shifted horizontal position, means 0 erative when the racks are raised to lock the same automatically against material rearward movement, and means operative upon lowering of the racks to automatically return the same to exact position.

30. he fiatlatentypewriter, thecombination of aat-platen, horizontally-disposed longitudinal line-spacing racks slidable orizontally in the direction of their length, and amanually-operated screw-controlled device arranged at the forward part of said racks and rotatable to effect minute, fractional movement of said racks longitudinal in either direction relative to the platen.

31. In a llat- .laten typewriter, the combination of a at-platen, horizontally-dis posed longitudinal line-spacing racks slidable iorizontally in the direction of their length, and a manually-operated screw-controlled device arranged at the forward part of but independent of said racks and rotatable to eli'ect minute, fractional movement of said racks longitudinal in either direction relative to the laten.

32. n a fist laten typewriter, a support,

r line-spacing rac (s tiltable and longitudinally slidablc horizontally thereon, and a manually-operated screw-device mounted on the support and engaging the racks to shift them horizontally and for distances fractionalof regular line-spaces for interline-writing.

In a flat platen typewriter, a support,

spaced plates thereon, line s acing racks tiltably and longitudinally s idahly eonnected to one of said plates and resting slid ably upon the other late, and an ad 'usting screw mounted on t re last ,named plate to cooperate with the racks. i

34. In a flat platen typewriter, a support,

line spacing rac rs tiltable and longitudinally slidahle thereon and provided at their for ward ends, with a depending flange, and an adjusting screw device mounted on the support in engagement with said flange.

35. In a fiat platen typewriter, tiltable hinge members, and longitudinal line spacing racks scoured thereto for u )Ward-tilting and for sliding in the direction their length.

36. In a flat platen typewriter, a support, a platen mounted thereon, hinge members tiltahly connected thereto, and, tiltable longitudinal line spacing racks secured to said hinge members for adjustment in the direction of their length when in their normal position.

37. In a flat platen typewriter, tiltahle.

aeasee hinge members provided with slots formed longitudinally therein. longitudinal line spacing racks mounted thereon, and enlarge'zh headed fastening devices lot into said racks and working in said slots.

38. In a typewriter, a flat platen, tiltable hinge members, longitudinal lino spacing racks tiltahle with and slidable on said hinge members, and longitudinally disposed locking racks and pawls interposed between the racks and hinge memhersto prevent rearward movement of the line spacing racks when tilted.

39. In a typewritena flat platen, tiltahle hinge members, longitudina bein arranged to engage automatically with the rack upon elevation of the frame, and

means for automatically removing the pawl from engagement with the rack upon depression of the track frame to normal position.

41 In a flat platen typewriter, tiltable line spacing racks connected to more 'iugather, a tiltahle hinge member uponvrhirh said racks are mounted, a lon retinal lovi-1- ing rack disposed upon the top of said 1 member, a )ivoted pawl mounted en ti spacing raclas and nlatically with the locking reel: l of the line spacing racks, and r eans fig rnaticalltdisengaging the pawl on'denres" sion of the racks to normal positi n.

42. In a flat platen typewriten, tiltahle line spacing racks connected to move to gether, a tiltahle hinge member n on which. said. racks are mounted, lpngitn" i'nal looking rack disposed upon the lop of said hinge member, a pivoted pawl connected.

BU line spacing racks and. arranger. to engage automat cally with the lockin re k tilting of the spacing recite,

pending from said pearl and disposed to ing rack formed on said hinge member, a pawl pivotally connected to the spacing ranks, a spring disposed to cause eeteinatic arranged to engage wa the engagement of the pawl with the locking i supported at their rear, and constructed to rack upon tilting of the spacing racks, and means for automatically disengaging the pawl upon depression of the spacing racks to normal position.

44. In a flat platen typewriter, tiltable .hinge members having longitudinal locking racks disposed on their upper surfaces, longi' tudinal hne spacing racks mounted on said hinge members to tilt therewith and having downward opening internal chambers, longitudinal slotted connection between-the 5 acing racks and hinge 'members, and loo ing pawls mounted in said chambers.

45. In a ty ewriter, hinged traclerails constructed to be adjusted horizontally and, also, to be tilted vertically, a carriage movable longitudinally on said track rails, means for adjusting said track rails and their sup ported carriage horizontally, said rails being inged intermediate their length to present sections extending to the front and rear of the hinge operated w en the carriage is disposed to one side ofithe hinge point, and means for locking the said carriage and rails against shifting in the direction of adjustment while said rails are being tilted vertically.

46. In a typewriter, track rails movable vertically and horizontally, a carriage, movable longitudinally thereon, means l'or adjusting rails and carriage horizontally, and means for efiecting locking of said rails in their adjusted position while said rails are being moved vertically.

47. In a typewriter, track rails movable vertically and horizontally, a carriage movable longitudinally thereon, means for adjusting rails and carriage horizontally, means for effecting automatic'locking of said railsin their adjusted position while said rails are being moved vertically.

48. In a typewriter, a flat platen, hinged, tiltable track rails, a carriage movable longitudinally thereon for line spacing, spacing mechanism carried by the carriage, and a key-operated line finder carried by and traveling with the carriage.

49. In a typewriter, a fiat platen, hinged, tiltable track rails, a carriage movable longitudinally thereon for line spacing, spacing mechanism carried by the carriage, and a key-operated line finder normally retracted from the rinting point and constructvi'd tp'be projecte thereto.

50. In a typewriter, the combination with track rails, a carriage constructed to traverse said rails for lines acing and hinges upon which said track rai s are movably' supported at their rear, of means for automaticall locking the rails to the hinges when said rai s are tilted.

51. In a typewriter, tiltable track rails, a longitudinal traveling carriage supported onthe rails, ingesupon which said rails are ploint, whereby. said rails will be permit horizontal sliding of the rails thereon, and an automatically operating locking device constructed to lock the rails to the hinges when said rails are tilted,'and constructed to be automatically unlocked when said-rails are returned ,to their normal horizontal position.

52. In a ty ewriter, the combination with movable trac l rails, and a longitudinally traveling carriage disposed thereon, of means for supporting the forward end of' the track rails and constructed to guide the name into operative position, and an adjusting screw for moving the track rails longitudinally.

53. In a typewriter, the combination with a flat platen and an overlying writing mechanism, and with feed mechanism for imparting to one'of said members a longitudinal step-by-step line spacing movement relative to the other, of minutely-shifting, screw-operated means for effecting longitudinal adjustment of said member, and a line finder carried by the writing mechanism to indicate the proper degree of adjustment.

54. In a typewriter, the combination with a fiat platen, an overlying writing mechanism, and feed mechanism for positioning the writing mechanism over the platen for im printing successive lines of writing, of minutely-shifting, screw-operated means for in:

arting to said writing mechanism a fine ongitudinal shifting distinct from the line spacing movement, and a line finder carried by the writing mechanism .to indicate the proper degree of shifting.

55. In a typewriter, the combination with a fiat platen, an overlying writing mechanism, and feed mechanism for positioning the writing mechanism over the platen for imprinting successive lines of writing, of minutely-shifting, screw-operated means for imparting to said writing mechanism a fine longitudinal shifting distinct from the line spacing ,movement, a line finder carried bytie writing mechanism and normally re tracted from the printing point, and means for projecting said finder t0 the printing point.

56. In a ty ewriter, the combination with a longitudina 1y traveling carriage, tiltable and longitudinallymdjustable track rails upon which said carriage travels and comprising a fiat-faced body portion and a round-faced rib raised above said flat-face body portion, and rollers carried by the carriage and arranged to travel upon said rib.

57. In a t pewriter, the combination of a longitudinally travelin carriage, tiltable and longitudinally-adjustafile track rails upon which said carriage travels and comprising a flat-faced body portion and a round-faced rib raised above said fiat faced body-portion, rollers carried by the carriage and provided with a peripheral groove constructed to engage the rib and steady the carriage during its travel.

58. In a typewriter, the combination of a longitudinally traveling carriage, track rails I upon which said carriage travels and comprising an upper flat-faced body portion, a

59. In a typewriter, a longitudinally traveling carriage, track rails upon which said carriage travels, dog-mechanism carried by the carriage, toothed members connectin with said dog-mechanism, feed racks formed on said track rails and with which said toothed members engage,. peripherally grooved rollers carried by said carriage, said track rails comprising a body portion, a rib formed on the upper face thereof and con-- structed to be engaged by said peripherally ese.

above said upper surface, and a laterally. rejecting flange having a continuously evel lower surface.

61. In a fiatplaten typewriter, the combination of longitudinal track rails, and a longitudinally traveling carriage mounted thereon and bearing against both the upper and lower surfaces thereof.

62. In a typewriter, the combination of a fiat platen, of a support, and track rails longitudinally slidable on said sup ort.

In testimony whereof, I a it my signature, in the presence of two subscribing witnesses.

GEORGE W. DONNING.

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