US597038A

US597038A - Type-writing machine

Info

Publication number: US597038A
Authority: US
Publication date: 1898-01-11
Anticipated expiration: 1915-01-11

Description

(No Model.) 4 Sheets-Sheet 1,

R. TURNER. TYPE WRITING MACHINE.

No. 597,038. Patented Jan. 11,1898.

"W-Ym (No ModeL) 4 Sh'eets8heet 2.

- R TURNER TYPE WRITING MACHINE.

Patented Jam-11, 1898.

(No Model 4 Sheets-Sheet 3.

R. TURNER.

TYPE WRITING MACHINE.

No. 597,038 Patented Jan. 11, 1898.

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;(N0 Model.) 4 Sheets-$heet 4.:

R. TURNER TYPE WRITING MACHINE.

No 597,038. I Patented Janull, 1898.

6 III/ll mun 11mm W I Q J L I mmmwkw Unrrnn STATES PATENT @rrrcn.

ROBERT TURNER, OF DES MOINES, lOlVA.

TYPE-WRITING MACHlNE.

SPECIFICATION forming part of Letters Patent No. 597,038, dated January 11, 1898.

A li ati fil d November 30, 1896. erial No. 614,032. (No model.)

To ctZZ whom it may concern:

Be it known that 1, ROBERT TURNER, a citizen of the United States of America, residing at DesMoines, in the county of Polk and State of Iowa, have invented new and useful Improvements in Type WVriters, of which the following is a specification.

One of the objects of this invention is to provide a bearing on which the platen-carriage may move longitudinally with a minimum of friction and the necessity for frequent applications of lubricant thereto dispensed with and a simple, cheap, and durable carriage-bearing provided.

A further object is to provide improved means of simple and durable construction and easy of operation whereby the platen may be set to be rotated either one or two linespaces, or is released so that it may be rotated any distance and stop at points between the lines.

Afurther object is to provide simple,strong, and durable means that may be easily and quickly operated for separating the tensionroller from the platen to permit the easy passage of paper and for replacing the same in position to hold the paper firmly.

A further object is to provide means of simplified and cheapened construction for yieldingly pressing the paper holding fingers against the platen, and, further, to provide means whereby the out-er fingers may be quickly adjusted relative to the ends of the platen and securely held against inadvertent longitudinal movements.

A further object is to provide an inexpensive marginal. stop device by which the return movement of the carriage is limited and which may be quickly and accurately set to stop the carriage at any predetermined position. I

A further object is to provide a device for adjusting the tension of the spacing-dogs, which device is of strong and durable con struction and capable of an easy and at the same time minute and accurate adjustment.

A further object is to provide means that may be easily and quickly operated whereby the spacing-dogs are moved a slight distance longitudinally relative to the platen, so that an impression of a type previously made may be shaded by reprinting the same letter in the same space.

A further object is to provide a printingline indicator having a straight edge that will indicate accurately the li no on which the printing is being done when the platen is raised, and thus aid the operator in replacing a previously-printed line in the machine in perfect alinemen t, even though the said printed lines be at other than a right angle to the sides of the paper, and to provide means whereby the line indicator or gage may be automatically withdrawn when the platen is lowered, so as to not interfere with the types when printing.

A further object is to provide for this class of machines a paper-table that is readily detachable and also designed to fold toward the platen when the platen is raised, as required, to permit the platen to pass a vertical line, and hence remain in a raised position when placed therein.

My invention consists in certain details of constructiomarrangement, and combinations of parts whereby the objects contemplated are attained, as hereinafter set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which- Figure 1 shows a top View of the platen-carriage and the carriage operating and controlling mechanism and part of the type-writer frame. Fig. 2 shows a front elevation of the same with the carriage raised. Fig. 3 shows an end elevation of the same mechanism, having one of the thumb-wheels that control the movement of the platen removed. Fig. 4. shows an inverted perspective view of one end of the platen and the mechanism for. rotating the platen one or two line-spaces or for permitting a free rotation thereof. Fig. 5 shows an end view of the mechanism for controlling the rotation of the platen. Fig. 6 shows a vertical section through the line 6 6 of Fig. 5. Fig. 7 shows a top view of the device for adjusting the marginal spaces. Fig. 8 shows a transverse section of the top of the typewriter frame and carriage-frame, illustrating in detail the mechanism for operating the paper-table,the line and space indicator, and the marginal stop. Fig. 9 shows a rear elevation of the feed-dog tension device. Fig. 10 illustrates the same mechanism and is a section of the shading device, illustrating by dotted lines the movement of same. Fig. 13-shows a transverse section of the carriage, taken along the line 13 13 of Fig. 2. 'Fig. 14 shows a detail sectional view to illustrate the mechanism for movingthe tension-roller relative to the platen. Fig. 15 shows a detail perspective view to illustrate the same mechanism. Fig. ldshows a detail view of the rear face of the scale-bar'to illustrate the sliding connection of the paperfinger therewith. Fig. 17 shows a detail sectional view of the same through the vertical center of the paperfingers.

In the following description lshall only describe minutely and specifically such parts as are newin themselves or are adaptedin shape and size to cooperate with some of the novel parts. It is to be understood that the parts .merely mentioned are ofthe same construction and perform the function usual to the partnamed in most type-writers of this class.

In the accompanying drawings the parts of the frame shown are indicated by the refer once-numeral 10.

Mounted on thetop of the frame, extended longitudinally thereof,and projecting slightly beyond the sides of the frame, is a flat trackbar 11,having a V-shaped longitudinal groove 12 therein.

13 indicates the frame of the feed-rack, hav ing a track-bar 14 thereon, provided with a V-shaped groove 15 to mate with the groove 12. Two or more balls 16 are interposed between the two tracks to support the weight of the said frame and brace it against lateral movements and to permit it to move with a minimum of friction. The ballsare confined by pins or screws 17. The said frame is supported against tilting movements by means of two antifriction-rollers 18, supported upon the bar 11, to engage the top surface of the track-bar 14, and an antifriction-roller 19, mounted in a point in the rear of the carriage to admit a guide-bar 20, supported by the frame 13. Thus the major part of the weight of the carriage is carried upon the balls and friction and wear reduced to a minimum.

On the frame 13 is the usual feed-rack 21 and the carriage-tension device 22.

The platen and its accompanying parts are mounted in a suitable frame 23, that is hinged to the frame 13, so as to be capable of swinging upwardly beyond a vertical line. A platen 24. of the ordinary kind is rotatably mounted in the frame, and on one of its ends is a ratchet-face 25. The means for rotating the platen comprises an arm 26, rotatabl y mounted on the platens shaft and having a sleeve 27 on its lower end that stands in a horizontal plane with its one end in alinement with the ratchet-face 25. lVithin this sleeve is a detent 2S,'normally forcedtoward the said ratchetface by means of a spring and provided on its outer end with a pin 30, that extends at right angles to thedetent and overlaps the outer surface of the frame 23, for purposes hereinafter made clear. This arm 26 is held to its rearward limit'bythe spring 31, therefor. hen the said detent is held againstthe ratchet-face and the arm forced forwardly, the platen will be advanced.

For preventing inadvertent movements of the platen and for positively stopping the same when moved the proper distance by the line-spacing lever I have provided a sleeve 32, fixedto the frame .23, with its one end close to the ratchet-face of the platen. Slidingly mounted in this sleeve is a detent 33, having on its inner end a roller 34,0f a size to be admitted between the teeth of the ratchet, and on its outer end beyond the side of the frame 23 a pin'35 (shown in Fig; 3)to overlap the frame. A post 36 (shown in Fig. 4) projects upwardly from the detent through a slot in the sleeve to provide means for guiding the detent. I

A line-spacing lever 37 is fulcrumed to the carriage-frame 23 and is provided with an arm 38 to engage the arm 26 and a second arm 39 to-engage the post 36. These parts are so arrangedthat when the lever is operated the arm 26 is first engaged and rotated far enough to move the platen one or two line-spaces. Then the post 36 is engaged and the roller 34. of the detent 33 is forced between two of the ratchet teeth and a further rotation of the platen positively prevented. The said rollerdetent is free to yieldingly engage the ratchet at all times as required to prevent its inadvertent rotation, except when forced thereagainst by the line-spacing lever 37, having an arm 39.

I have provided means for determining the number of line-spaces that a movement of the lever 37 will rotate the platen as follows: 40 indicates a segmental plate pivoted to the outer surface of the frame 23, concentric with the platen-shaft. At its top is a handle -11, and on its outer surface is a cam 42, designed to engage the pin 30 of the detent 28. lVhen the segmental plate is placed in one position, the said cam will permit the detent to engage the ratchet-face as soon as the spacin g-lever is moved. Hence the platen is rotated two linespaces or the entire distance that the limited movement of said lever will permit, and when the segmental plate is moved to its second position the cam will prevent the detent from engaging the ratchet-face until it has passed one of the ratchet-teeth. Hence the platen will be moved but one line-space. It is sometimes desirable to permit the platen to stop at points between the lines, and to provide for this I have placed a cam 43 on the segmental plate in a position where it may be brought into engagement with the post 35 on the roller-detent 33, and thus hold said detent out of engagement with the ratchet-face.

A screw 44 is passed through a segmental slot 45 in the plate 40 into the frame 23, and a sliding bolt 46 is mounted in an opening in said frame and normally forced into engagement with the segmental plate 4-0 by a coilspring 47. Three notches 48 are formed in the plate to admit said bolt and thus stop the segmental plate in one of three positions nec essary to move the platen one line-space or two line-spaces or to hold the rollendetent 33 out of engagement with the ratchet'face, and owing to the position of the cam 42 the detent 28 will be in an operative position relative to the ratchet 25. At the rear of the frame 23 is a fixed rod 49 to extend parallel with the platen, and on the end portions of the rod are pivoted the brackets 50. These brackets are yieldingly held in the direction of the platen by the leaf-spring 51. In their lower ends is mounted a tension-roller 52 of the ordinary kind. Each bracket has an angular opening 53 therein, and 5% indicates a rod passed through said openings having its bearings in the frame 23 and provided with cams 55 to engage said angular openings. A lever 56 on one end of said rod provides means whereby the rod may be rocked to force the cams against the sides of the openings and thus swing the brackets and the tensionroller away from the platen to permit the ready insertion or removal of paper. Then the flat surfaces of the cam engage the sides of the openings, the tension-roller and platen are in engagement and the springs 51 must be compressed slightly before the rod 54; may

be turned. Thus the platen is partially locked when in. its closed position.

Two arms 57 are pivoted to the tensionroller shaft anda paper-guide plate 58 is fixed to their lower ends. It is normally held in engagement with the platen by the leaf-springs 50, which are fixed to the rod 49 and engage pins 60 on the said arms 57.

At the forward end of the carriage-frame is a scale-bar 01 and above it a round rod 62 to support the paper-fingers. One paper-finger is located in the middle of the rod and one on each end portion thereof. Each is composed of a sleeveBS, loosely mounted on the rod and having on its under side a transversely-bored lug 6e and the flat curved finger 65, fixed to its inner face. In this lug (ll is placed a spring 66 and a round-headed bolt 67, that is normally held in engagement with the inner face of the scale-bar. It is desirable that the central finger be stationary as against longitudinal movements and also held slightly out of engagement with the platen. I have therefore provided a slot 68in the sleeve and a screw 69 to pass through the slot into the rod. It is also desirable to have the outer bolts 67.

thumb-wheel.

justable and yet are held very securely in any position in which they are placed. Figs. 13, 16, and 17 show this mechanism quite clearly.

A track-bar '1' 1 is fixed to the forward end of the machine-frame, parallel with the trackbar 11. In this bar a number of antifrictionrollers 72 are mounted to engage the lower edge of the scale-bar and support the weight of the forward end of the platen-carriage. On the inner left-hand surface of this trackbar is a groove 73, in which is slidingly mounted a plate 74, having a series of openings 75, separated by the distance of one type-space, and also an indicator and stop 76, projecting upwardly therefrom. On the top surface of this track-bar, adjacent to the plate 74, is a scale 77, corresponding to the scale on the scale-bar, and a spring-actuated bolt '78 is passed through the track-bar to enterthe openings in said plate 74:. On the bar 62, at its left end, is a gravity-stop 79, having on its left lower edge a bevel 80. Its other edge is square. In practical use when the carriage is moved from the left to the right the said stop 79 will engage the stop 76 and hold the carriage, thus determining the size of the margin to be left on the paper. hen traveling in an opposite directionthat is, from the right toward the left-the said bevel will engage the stop 76, and hence the stop 79 will be forced rearwardly and the travel of the carriage not interfered with. To set the stop to produce any desirable size of margin, the spring-bolt 78 is drawn outwardly and the plate 74 is moved until the stop 76 is in alinement with the desired point on the scale 77. The sp ring-bolt is then released and will pass through an opening in said plate, and thus hold it in position.

The improved feed-dog mechanism com prises a suitable cast-metal frame 8]., secured to the rear of the machine and having the usual feed-dogs 82 mounted therein by being fixed to a rod 83. This rod is arranged to be capable of a slight longitudinal movement, but is normally held to its limit toward the left by means of a spring 8st. At the rear lower corner of this frame 81 is a rod 85, rotatably mounted, having on its one end a worm-wheel 8G and in its central portion a pin 87. A second rod 88 is mounted in the same frame and is provided with a worm 89 to mesh with the wheel 88 and a thum b-wheel 90 on its rear end. It is obvious that a minute and accurate and easy adjustment of the rod 85 is had by a manipulation of said An arm 91 is pivot-ally mounted on the rod 85 to project upwardly therefrom, and a spring 92 is wound upon the rod 85, with its central portion overlapping the pin apd its ends in engagement with the said arm to press its upper end forwardly. 93 indicates a rod slidingly' mounted in the frame 81, with its one end in engagement with the upper end of the arm 91 and its other end against the arm 94, that projects downwardly from the feed-dogs. Thus the resiliency of the spring 92 is used to force the free ends of the feed-dogs upwardly. In combination with this mechanism just described I have provided a device for moving the feeddogs laterally a slight distance for the purpose of shading the letters by reprinting the same letter partially in the same space, the latter one a little to one side of the former one. 95 indicates a rod rotatably mounted in the frame 81 and having'a cam 96 on its inner end to engage a collar 97 on the rod to which the feed-dogs are fixed. A lever 98 on the outer end of said rod provides means whereby it may be turned. An operation of said lever will obviously bring the cam in engagement with the said collar and force the dogs laterally. When released, the spring 84 will return the dogs to their normal position.

I have provided a device whereby the operator may accurately place a paper in the machine, so thatfurther prin ting may be done in exact alinement with previously-printed matter or on a designated line, even though said line be at other than a right angle to the edges of the paper. To this end I have provided an upright 99, to be secured to the machine-frame, and a curved arm 100, pivoted in its top to pass under the platen and engage same with its outer end. Said outer end is provided with a straight edge 101. A spring 102 is applied to the line-indicator to normally force it upwardly, and said pivotal point is arranged above the pivotal point of the platen-carriage, so that as the platen is raised the line-indicator will move upwardly in its relation to the platen far enough to present its straight edge on the printing-line of the platen, and as the platen is lowered it will be withdrawn, so as to not interfere with the impact of the types against the platen.

It is desirable to have the paper-table 103 arranged relative to the platen, so that as said platen is elevated the paper-table will move relative to the platen, as required, to permit the platen to turn backwardly beyond a central line, in contradistinction to a papertable rigidly fixed to the platen-frame. On the under side are two fiat springs 104:, fixed near the top edge and having their free ends curved forwardly near the lower edge of the table to provide a detachable and pivotal connection with the rod -19 of the platen-carriage frame.

105 indicate two links pivoted at their upper ends to the ends of the table and having openings 100 in their lower ends to engage the journal-pins 107, fixed to the frame 23. Thus the axial point of the table is eccentric to the axial point of the platelrcarriage and is so arranged that the paper-table will move toward the platen. when the platen is elevated. This is clearly shown in Fig. 8 and the operation shown by dotted lines.

Having thus described the construction and function of each feature in its turn, what I claim as new therein, and desire to secure by Letters Patent of the United States therefor.

1. In a type-writer, the combination of a bar to extend longitudinally of the machine-frame and having a V-shaped groove therein, a roller having a grooved periphery rotatably mounted in the machine-frame in the rear of the said bar, a sliding carriage, a bar fixed thereto and having a V-shaped groove on its under surface, bearing-balls interposed in said grooves, arms projecting rearwardly from the carriage, a guide-rod supported thereby to engage the aforesaid grooved wheel, and a series of antifriction-rollers fixed to the trackbar on the machine-frame to engage the top surface of the track-bar on the sliding carriage-frame, and a platen-bearing frame hinged to this sliding carriage, for the purposes stated.

2. The combination with a type writer platen rotatably mounted, of a ratchet-face on one end thereof, an arm pivoted to the platen-shaft, a spring for normally holding the arm rearwardly, a sleeve on the outer end of the said arm, a detent in said sleeve to engage the ratchet-face, a spring for normally forcing the detent against the ratchet-face, a lever fulcrumed to a part of the platen-carriage, having its one end in engagement with said arm, to rotate the same and means for limiting the movement of the lever.

3. The combination, with a type writer platen rotatably mounted, of a ratchet-face on one end thereof, an arm pivoted to the platen-shaft, a spring for normally holding the arm rearwardly, a sleeve on the outer end of the said arm, a detent in said sleeve to engage the ratchet-face, a spring for normally forcing the detent against the ratchet-face, a lever fulcrumed to a part of the platen-carriage having its one end in engagement with said arm, to rotate the same, means for limiting the movement of the lever, a cam attached to the platen-frame, and capable of a slight movement thereon, and a pin on the outer end of the said detent to engage said cam and hold the detent away from the ratchet-face.

4. The combination, with a type writer platen rotatably mounted, of a ratchet-face on one end thereof, an arm pivoted to the platen-shaft, a spring for normally holding the arm rearwardly, a sleeve on the outer end of the said arm, a detent in said sleeve to engage the ratchet-face, a spring for normally forcing the detent against the ratchet-face, a leverfulcrumed to a part of the platen-carriage, having its one end in engagement with said arm, to rotate the same, means for limitin g the movement of the lever, a rollerdetent mounted in the platen-frame adjacent to said ratchet, a pin projecting therefrom, a spring for n ormally holding the roller in contact with the ratchet, and an arm on the said lever to engage said pin and force the said roller into positive engagement with the ratchet-face at the end of the movement.

5. The combination, with a type-writer platen rotatably mounted, of a ratchet-face on one end thereof, an arm pivoted to the platenshaft, a spring for normally holding the arm rearwardly, a sleeve on the outer end of the said arm, a detent in said sleeve to engage the ratchet-face, a spring for normally forcing the detent against the ratchet-face, a lever fulcrumed to a part of the platen-can riage, and having its one end in engagement with said arm, to rotate the same, means for limiting the movement of the lever, a cam attached to the platen-frame, and capable of a slight movement thereon, and a pin on the outer end of the said detent to engage said cam and hold the detent away from the ratchet-face, a roller-detent mounted in the platen-frame adjacent to said ratchet, a pin projecting therefrom, a spring for normally holding the roller in contact with the ratchet, and an arm on the said lever to engage said pin and force the said roller into positive engagement with the ratchet-face, at the end of its movement.

6. In a type-writer, a suitable platen, a ratchet-face at one end thereof, a spring-actuated detent normally held in engagement with the ratchet, a pin on the outer end of the detent, means for advancing the detent to rotate the platen, a segmental plate pivoted to the platen-frame, a cam on said plate to engage the said pin and hold the detent out of eontactwith the ratchet, until it passes beyond the cam.

7. In a type-writer, a suitable platen, a ratchet-face at one end thereof, a spring-actuated detent normally held in engagement with the ratchet, a pin on the outer end of the detent, means for advancing the detent to rotate the platen, a segmental plate pivoted to the platen-frame, a cam on said plate to engage the said pin and hold the detent out of contact with the ratchet until it passes be: yond the cam, a roller-detent mounted in the platen-frame to engage the ratchet-face, a pin on its outenend, a spring for holding it in Contact with the ratchet, means for forcing it toward the ratchet when the other detent is advanced to rotate the platen and a cam on said segmental plate for engaging said post for the purposes stated.

8. The combination in a typewvriter, of means for rotating the platen, one or two linespaces, or an. indefinite distance, comprising an arm pivoted to the platen-shaft, a springaetuated detent in its end, a pin on said detent, a spring'actuated, roller-detent mounted in the platen-frame, a pin on the outer end, a lever fulcrumed to the platen-frame and having arms to engage the aforesaid arm and also said roller detent, a segmental plate pivoted to the platen-frame, and two cams thereon to be engaged by said detent pins or posts.

9. The combination with a device for rotating a platen one, two, or an indefinite numand two cams on the outer face thereof, for

the purposes stated.

10. The combination with a platen, of two brackets pivoted at their upper ends to the ends of the platen-frame in the rear of the platen and having angular openings therein, a tension-roller mounted in the said brackets, yielding pressure devices for holding the roller to the platen, a rod rotatably mounted in the platen-frame and extended through said angular openings and cams on said rods to engage said angular openings, and a lever on one end of the said rod.

11. The combination with a platen of two brackets pivoted at their upper ends to the ends of the platen-frame in the rear of the platen and having angular openings therein, a tension-roller mounted in the said brackets, yielding pressure devices for holding the roller to the platen, a rod rotatably mounted in the platen-frame and extended through said angular openings and cams on said rods to engage said angular openings, a lever on one end of the said rod, a guide-plate pivoted to the tension-roller shaft and yielding pressure devices for normally holding it against the platen.

12. The combination with a platen-frame and a platen, of a sleeve rotatably mounted on the platen-frame in front of the platen, a bolt slidingly mounted beneath the sleeve at right angles thereto, to engage a part of the platen-frame, a spring for pressing said bolt forwardly and a paperfinger fixed to the sleeve, substantially as set forth.

13. The combination with a platen-frame and a platen, of a sleeve rotatably mounted on the platen-frame in front of the platen, a bolt slidingly mounted beneath the sleeve at right angles thereto, to engage a part of the platen-frame, a spring for pressing said bolt forwardly, a paper-finger fixed to the sleeve, and a setsere\v passed through a slot in the sleeve into the sleeve-support, to limit the movement of the finger.

14. The combination with a platen and a platen-frame, of a round bar in the platenframe in front of the platen, a bar beneath the said bar having a flat inner surface and a series of notches therein, a sleeve rotatably mounted on the round bar, a bolt slidingly mounted on the under side of the sleeve, a spring for normally pressing said belt forwardly into engagement with the rear surface of said notched bar, and a paper-finger fixed to the sleeve substantially as set forth.

15. In a type-writer, the combination with a suitable carriage, of a bar fixed to the machine-frame, to extend parallel with the carriage, a scale marked on its top, a plate slidt stapes ingly mounted in said bar and a stop on said plate, means for securing said plate at any point relative to the bar, and a gravity-stop pivoted to the carriage-frame and having a square edge 011 its right side and a bevel on its left for the purposes stated.

16. In a type-writer, the combination with a suitable carriage, of a bar mounted on the machine-frame to extend parallel with the carriage, a scale marked on its top, a perforated plate slidingly mounted on the inner face of said bar, astop fixed thereto, a springactuated bolt in the said bar to enter said perforations, and a gravity-stop pivoted to the carriage-frame and having a square surface on. its right edge and a bevel on its left, substantially as set forth.

17'. In a type-writer, the combination with a sliding carriage having a feed-rack, of a suitable feed-dog pivotally mounted adjacent to the feed-rack, an arm projecting downwardly therefrom, a rod pivoted in suitable bearings in the rear of the macl1ineframe, a Worm-gear on its one end and a pin in its central portion, an arm mounted on said rod and extended upwardly therefrom, a rod slidingly mounted with its one end in engagement with said arm and its other with the arm on the.

feed-dog, and a spring on the said pivoted rod having its central portion in engagement with the said pin and its ends in engagement with said arm on the rod, and a shaft rotatably mounted having a worm-gear on its one end to mesh with the aforesaid worm-gear and a thumb-wheel on its other end, for the purposes stated.

18. In a type-writer having a sliding earriage and a feed-rack thereon, the combination of a pivoted feed-dog, capable of a slight movement longitudinally of the platen, a spring for normally holding the dog to one limit of its movement and a shaft rotatably mounted in suitable bearings having a lever on one end and a cam on its other end to en gage the shaft to which the feed-dogs are fixed, substantially as set forth.

19. In a type-Writer having a sliding carriage and a feed-rack thereon the combination of a rock-shaft capable of a slight longitudinal movement, a collar th'ereon, a spring for holding the shaft to its limit of movement, a feed-dog fixed thereto, a second shaft rotatably mounted having a lever on one end and printingdine on the platen, and a notch of approximately one letter-space formed in the said straight edge at the printing-center of the machine, and a spring to engage the said curved arm and to yieldingly hold it against the platen, said parts being so proportioned and arranged that when the platen is in its elevated position the straight edge on the end of the curved arm will lie parallel with the printing-line of the platen, and when the platen is in its lower position ready for printing the said straight edge will be withdrawn from the printing-line in a direction toward the pivotal point of the arm, substantially as and for the purposes stated.

21. In a type-writer, the combination of a sliding carriage, a platen bearing frame hinged to the sliding carriage, a rod fixed to the platen-bearing frame to extend longitudinally thereof, a paper-table detachably and 'pivotally connected with the said rod, and

links pivoted to the ends near the outer edge of the paper-table and detachably and pivotally connected with the sliding-carriage frame at a point in the rear of-the pivotal point of the platen-bearing frame, substantially as and for the purposes stated.

22. The combination in a type-Writer having a sliding carriage and a platen-frame hinged thereto, of a paper-table, two leafsprings fixed to its under side and arranged to detachably and pivotally engage a part of the platen-frame, two arms pivoted to the ends of the paper-table and detachably and pivotally connected with the said sliding carriage, substantially as and for the purposes stated.

ROBERT TURNER.

Vitnesses:

J. RALPH Onwre, THOMAS G. ORWIG.