US1159404A - Paper supporting and feeding mechanism for type-writing machines. - Google Patents

Description

- O.- 0. MARTIN.

PAPER SUPPORTING AND FEEDING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED FEB 24. 1910.

1,159 Patenteei NOV 9, 1915.

6 SHEETS-SHEEI I.

PVITNESSES 0. O. MARTIN.

PAPER SUPPORTING'AND FEEDING MECHANISM FOR TYPE WRITlNG MACHINES. APPLICATION FILED FEB.24.1910.

6 SHEETS-SHEET 2.

INVENTOR,

0-. 0. MARTIN. PAPER SUPPORTING AND FEEDING MECHANISM FOR TYPE WRITING MACHINES.

I APPLICATION FILED FEB, 24. I910.

1,1 59,404., Patented Nov. 9, 1915.

6 SHEETS-SHEET 3.

[NYE/V7018,

0. 0. MARTIN. PAPER SUPPORTING AND FEEQING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED FEB 24. I910.

Patented Nov. 9, 1915.

6 SHEETS-SHEET 4- A llamzy I 0. 0. MARTIN.

PAPER SUPPORTING AND FEEDING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED FEB-24.19). 1,159,40%. Patented Nov. 9, 1915.

6 SHEETS-SHEET 5.

O. O. MARTIN. PAPER SUPPORTING AND FEEDING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED FEB. 24. I910.

Patented Nov. 9, 1915..

www- I,

6 SHEETS-SHEET 6.

l/VVE/VTOR,

Nb mm @w OLAF 0. 'IVIARTIN, F PORTLAND, OREGON,

ASSIGNGR T0 ELLIOTT-FISH 915' HARRISBURG, rnrmsrnvnn'inn COHPGRATION OF DELAWARE.

PAPER, SUPPORTING All FEEDING MECHANISM FOR 'IYEE-WfiITING MACHINES Specification of Letters it"atent.

T 0 all whom 2'25 may concern Be it known that I, @LAF U. liAIt'llN, a citizen of the United States of America. residing at Portland, in the county of ll'iultnd inah and State of ()regan, have invented certain new and useful Improvements in'l 'apcr Supporting and Feeding Mechanism for Typelvriting Machines, of'which the follpwing is a specification.

This invention relates to improvements in typewriting machines, and more particularly to a paper supporting and feeding mechanism adapted for use in connection with a downwardly acting printing mechanism.v v

The object of the invention, stated generally, is to provide a downwardly printing typewriter with a supporting structure in cluding a platen, and means for supporting. guiding and feeding a continuous web of paper which is led around the platen into position to be printed upon to the end that the paper web or strip may be continuously printed upon without shifting the machine longitudinally of the paper for line spacing as is usually necessary in this form of type writer.

[A further object of the invention is to provide retaining means for securing the machine in position for printing and operative to permit said machine to be moved back on the supporting structure to a position in rear of the platen when access to the latter is desired. Further objects subordinate to those stated willjappear as the succeeding descrip tion of the illustrated embodiment of the invention is developed.

In the accompanying drawings-Figure l is a. perspective View of an Elliott-Fisher writing-adding machine equipped. in accordance with my invention. Fig. 2 is a similar View of the machine supporting platen -frame. Fig. 3 is a plan view of the subjectmatter of Fig. 2. Fig. i a detail sectional View on the line -l-'l of Fig. a longitudinal sectional view through the platen frame and parts carried thereby. Fig. 6 is a perspective view of the platen frame and associated parts inverted, the paper roll being shown l8ll1OV l, l)llt tl 1 normal position thereof heing indicated in, dotted lines. Fig. 7 is a detiiil sectioi'ial View showing one of the machine catches and associated parts. Fig. 8 is an enlarged secplaten frame and associated parts, the active position of the paper .feeding mechanism belng shown in full lines and the inactive position of such mechanism being indicated in dotted lines. Fig. 9 "a section approximately on the line.9-'9 of Fig. 3, the line space mechanism being shown in different positions in full and dotted lines. Fig. 10 is a sectional view approximately on the line 10-l0 of Fig. 3 with the line spacing mechanism indicated in difierent positions and the variable stop of said mechanism set in a different position from that shown in Fig. 9. Fig. 11 is a view similar toFig. 10 but showingstill another adjustment of the variable stop. Fig. 12 is a detail view of the variable line space stop and immediately adjacent parts. Fig. 13 is a detail elevation of the mounting for the line space stop *ith parts broken away to more clearly show the detent for holding the stop in its adjusted position. Fig. 14 is a detail'perspective view of the line space lever, and Fig. 15 is a similar-view of the line space pawl. carrier. Each part wherever shownis indicated by its proper reference character.

The Elliott-Fisher writingadding mo.- chine indicated as a whole by 1 and shown clearly in Fig. l of the drawings, is a typewriter of the downwardly printing type well known to commerce. This machine includes a. main machine frame 2, supporting a carriagg- 3 which travels in the direction of letter spacing under the control of keys l, the depression of which causes the operation of downwardly acting type arms 5 (indicated in Figs. 1 and 5) and also operates escapeinent mechanism, not shown, which permits the carriage to be drawn step by step under the impulse of spring drums 6 connected to the carriage by tapes 7. The numeral keys also reflect the operation of a register or addmechanism 8 supported in rear of the carriage 3 by the frame 2. ()rdinarily in this type of machine the main machine frame 2 is shifted longitudinally of the In the ary ER COMPANY,

Patented Nov. 19115. A

tlonal viewof the front end portion of the upon what may betermed' a platen frame 9, the upper edges of the side members 10 and 11 of which constitute tracks or guides upon which travel rollers 12 carried by the frame 2 in front and rear, see Figs. 1 and 5.

In Fig. 1 the machine is shown moved back to a position in rear of its normal or operative position, but in Fig. 5 the machine is shown in its forward or printing position where it is secured 'to the platen frame or supporting structure 9 by movable catches 13 pivoted to the frame 2 and adapted to'eng'age notches 14 in the side members 10 and 11 of the frame 9, see- Figs. 1 and 7. The catches 13are urged toward their en-. gaging positions by springs 15 and include finger pieces 16 to facilitate the movement of the catches against the resistance of their 11, the frame 9 includes a number of transsprings. \Vhen it is desired to push the machine back from its printing position the operator merely grasps the frame 2 adjacent to its opposite ends and this act elevates the 'finger pieces 16 and thus releases the catches to permit the machine to be moved back as desired. When the machine is again drawn forward the catches snap in place and the frame 2 is securely held in proper relation to the printing point of the platen during the printing operation.

In addition to the side members 10 and verse members which serve to stiffen the supporting structure of the machine, for instance front and rear end bars 17 and 18 of cylindrical cross section, and a flat inte'r mediate bar 19, as shown in Fig. 5. These transverse bars 17, 18 and 19 are'secured by screws, as indicated in Fig. 6,, and in addition thereto are other transverse members to which reference will be made hereafter. The bar 17 is located at the lower front cornor of the frame and in rear thereof is mounted a transversely disposed cylindrical platen 20 of suitable material provided with a spindle 21 having hearings in the side members 10 and 11 of the frameand provided with terminal thumb wheels 22 to facilitate the free rotation of the platen in a manner well understood in the art. 1

Between one end of the platen and the frame bar 11 a ratchet wheel ordinarily lmown as the line space ratchet 23 is fixed .to the spindle'21 and is engaged by 'a detent 24 of usual construction, to prevent accidental movement of the platen during the printing operatiom' Associated with the platen are front and rear feed rolls 25 and 26, the former being mounted in the upper ends of roll frames 27 mounted to' swing from a transverse rock. shaft 28 and urged ftowardthe platen by springs 29 secured to the: transverse frame bar 17. The roll frames swing independently of each other. being: urged 'by their individual springs to present the rolls25 against the paper web 7 are urged toward the platen by springs 32' bearing upon the roll frames and secured to the under side of the intermediate frame bar 19. The front and rear rolls 25 and 26 are located at diametrically opposite points of the platen, the rolls 25 being located com paratively adjacent to but in front of the line of writing. In order to move the feed rolls away from the platen to inoperative positions (as indicated in dotted lines in Fig. 8) to facilitate the manipulation of the work sheet, I provide what may be termed a release lever 33 mounted to swing from the bar 17 adjacent to the long under side of the frame and having a short end 31 provided with a concavity 35 designed to coact with an arm 36 depending from the shaft 28, the arm being connected by means of a link 37 to a similar arm 38 depending from the shaft 31.

Extended from each of the shafts 28 and 31 are radially disposed pins 39 disposed to engage cross-bars 40 of the frames 27 and 30. Normally the feed rolls and their a's-. sociated partsoccupy the positions shown in full lines in Fig. 8. When, however, it is desired to throw off the feed rolls the lever 33 is depressed to the dotted position in Fig. 8, the short end 3 1'of said lever engaging and swinging the arm 36. This in turn rocks the connected shafts 28 and 31 and causes the pins 39 extended therefrom to engage the bars 10 of the roll frames and urge said frames away from the platen against the resistance of the springs 29 and 32, the relation of the axes of movement of the lever 33, the arm 36 and the coacting portions of the lever and arm being such thatthe parts will be retained in their in-.

operative positions until the lever 33 is again thrown up or returned to normal position.

The paper web 09 is led to the platen 20 from a paper roll 41 wound upon the spindle -12 supported by open bearings 43 in bearing plates 44 secured to the inner faces of the frame members 10 and 11 at points adjacent to the rear end of the frame, see Figs. 5 and v 6. From the under side of the roll 11 the web :0 is led over a horizontal apron 45 of sheet'metal or other su1table material secured at its rear edge to a transverse bar 46 and extended over the transverse frame bar 19. In advance of the bar 19 the apron 4:5 is led in a downwarddirection to a point adjacent to the periphery of the platen around which it is carried to a point ad-;

ran

meanneplaten being secured in place by tabs 48' screwed to the members 10 and 11. In

I order to facilitate the feeding of the front end of the web to the platen it is desirable to provide a paper guide 49, preferably of sheet metal, extending rearwardly from the platen and conforming to that portion of the apron 45 which extends from the bar 19 guide 49, and table 52 may be to the vicinity of'the rear feed rolls. 'The rear end of theguide 4:9 is bent upwardly, as indicated at 50, to provide a flared end to the guideway 51 defined between the guide 49 and the apron 45. Thus when the rear end of the paper web is drawn over the apron 45 from the roll it is readily passed into the guideway 51 and led thereby to the platen around the front side of which it is guided by the semicylindrical front portion of the apron 4C5.

For. the purpose of supporting and guid ing the advanced end or written portion of the web, a sheet metal paper table 52 is secured .above the guide 49 and is extended to the periphery of the platen in rear of the printing point. see Fig. 8. The apron 45, secured in any suitable manner, one convenient mode being that shown in detail in Fig. 4 wherein a screw 53 is passed through the table, guide I and apron and into the frame member 19, a spacing member 5a being interposed between the guide and apron and retained by the screw.

The paper roll 41 is protected by a sheet metal roll cover 55 hinged upon the trans-- verse frame bar 18, as shown in Fig. 5, and having fingers 56 which rest upon the rear edge of the apron 45. The fingers 56 not only serve to hold the front edge of the roll cover in position, but constitute lateral guides for the web which passes upwardly from the roll between the front edge of the cover 55 and the-rear edge of the apron 4:5.

4 If desired, additional lateral guides for the web may be provided in the form of flanges 57 extended along the opposite sides of the apron 45. It will be noted that the cover 55 constitutes a rearward extension of the apron 4-5 so that as the advanced end of the paper web moves rearwardly from the paper .table 52 it will be supported by the apron and guided over the paper roll by the cover 55 until it drops from the rear end of the roll cover and is received within a suitable receptacle located below the rear end of the platen frame.

Disposed along the platen 20 adjacent to. I

4 At points oppobut in rear of the line of writing or printmg point is a scale bar 58 carried by sw1ngmg arms 59 pivotally connected at-the1r rear ends to the frame members 10 and 11, as

thrown'back from the platen to facilitate the initial threading of the web.

The line spacing mechanism by means of V which the platen is rotatedstep by step in a mannerwell understood in the art includes a line spacing lever 62 mounted to swing from the shaft 28 and urged in one direction by a spring 63. At the front end of the'lever is formed a finger piece 64 and at its rear end is a laterally disposed pin 65 received within a slot 66 in a pawl carrier 67. The pawl carrier is in the formof an arm having a line spacing pawl 68 at its front end and loosely swung at its rear end from ;the platen spindle. 21, thecarrier 67 being provided with a. slot 69 for the reception of the spindle. At apoiht below the slot69 the carrier 67 is secured to the front end of a retracting spring 70 housed in a recess 71 in the adjacent side member of the frame and having its rear end secured to a fixed part as for instance a screw '72.

The joint actions of the springs 63 and 70 normally retain the line space lever 62 and the pawl carrier 67 in the position shown in Fig. 9, it being noted that-the-pawl 68 whilecontiguous to the teeth of the ratchet 23 is normally entirely disengaged from. said ratchet to permitv theplaten to be freely turned by the manipulation of the thumb wheels 22. When it is desired to linespace the writing on the web the operator depresses the front end of'the lever 62 toward the dotted position indicated in- Fig. 9. This movement of the lever causes the pin 65 to describe an are which. causes it to elevate the front end of the pawl carrier 67 and at the same time recede sufiiciently to enable the spring 70.130 draw the beak of the pawl 68 into engagement. with a tooth of the ratchet 23'. Continued movement of the lever 62 will cause the pin 65to elevate the pawl carrier 67 and thus advance the ratchet and rotate the platen, the arcuate path traversed by the pawl 68 as it moves with the periphery of the wheel 23 being accommodated by the slot 69 in the pawl carrier 67. The upward movement of the pawl carrier 67 and consequently the degree of rotary b, 0, disposed in graduits , greater movement of the carrier 67 limited ated' arrangement. In order to provide for the shifting of the stop member 73 in order to bring any desired stop into position to coact with the pawl carrier 67, said memher 7 3 is movable with a' slide 74 preferably integral with. the stop member and movable in a guideway 75 formed in the adjacent side member of the frame. At its front end the slide 74 is provided with a finger piece 76 by means of whichit may be readily manipulated and its retention in each of its several positions is effected by means of a spring-urged detent 7 7 engaging notches 78 in the bottom wall of the guideway 75. A

headed screw 7 9 screwed into the side of the 7 frame serves to prevent lateral displacementof the slide 74. 1 1

By reference to Fig. 9 it will be seen that when narrow spacing is desired the variable stop 73 is moved to its innermost position so as to arrest the pawl carrier 67 after comparatively slight rotary movement of the platen. If intermediate spacing is desired the member 73 is drawn out, as shown in Fig. 10, to permit the pawl carrier to have further movement limited by the engagement' thereof with the intermediate stop face I) and when wide spacing is desired the stop member is drawn out to the position indicated in Fig, 11 so as to permit a still by the engagement thereof with the third and last stop face 0. It is obvious, however, that if a greater variety of spacing is required, the number of line space stops or stop faces may be increased.

It is thought that from the foregoing, the described construction and arrangement of parts will be readily comprehended, but

while the present embodiment of the invention is believed to be preferable, I expressly reserve the right to effect such variations of the illustrated structure as may come fairly within the scope of the prayed.

lVhat I claim is l. The combination with a supporting frame and a printing machine, movably mounted thereon, of a platen mounted in the supporting frame adjacent to its front protection end, means for mounting a paper roll in rear of said platen, an apron mounted in the supporting frame and arranged to lead a paper web from the roll to the platen, a paper guide disposed substantially parallel to the apron to form a guideway for the web, and a horizontal paper support 10- cated in rear of the platen to support that portion of the web extended rearwardly from said member.

. 2. The combination with a supporting frame and a printing machine movable thereon, of a rotary platen mounted in the supporting frame adjacent to its front end,

feed rolls and line spacing mechanism. associated with said platen, an apron located in rear of the platen and having a guideway at its front end for a paper web, and a'horizontal paper support located in rear of the i. The combination with a supportingframe and a printing machine movable thereon, of a rotary platen mounted in the supporting frame adjacent to its front end,

feed rolls and line spacing mechanism asso:

ciated with said platen, means for mounting a papcr'roll in the supporting frame in rear of the rotary member, an apron extended between the paper roll and the platen and provided with. longitudinally disposed lateral paper guides and also having a guideway at its front end arranged to lead the web around the under side of the platen, and a horizontal paper support located above the apron and in rear of the platen,

5. In a mechanism of the character described, the: combination with a frame, of paper feeding mechanism including a rotary platen mounted in the frame,two series of feed rolls coacting with said platen, a-

pair of rock shafts, a series of rollframes mounted to swing from each shaft, springs for urging the roll frames toward the platen, projections extended from each rock shaft and disposed to engage and swing the roll frames'when the shafts are rocked, an arm extended from each shaft, a link connecting the arms, and a lever provided with a notched end coacting with one of said arms to rock the shafts for the purpose of withdrawing the feed rolls from the platen and to retain said shafts in the positions to which they are rocked.

6; The combination with a stationary frame, of a rotary platen mounted therein, means for mounting a paper feed roll in rear of the platen, paper guiding means intermediate of the platen and roll mounting, means for supporting that portion of the paper which has been extended back, from the platen, and a printing machine normally disposed over the platen but movable on thestationary frame to a position away from the platen.

7. In a mechanism of the character described. the combination with a frame, of paper feeding mechanism including a platen mounted in the frame, feed rolls coacting with the platen, a rock shaft, a series, of

urged. r011 frames mounted to swing I said shaft springs urging the roll fra 'nes toward the platen, projections extended from the rock shaft to engage and swing "the roll frames, an arm extended from the shaft, and a lever having a notched end coasting with said mm 130 rock the shaft for the purpose of withdrewing the feed. rolls from the platen and to retain said shaft in the position to Which it is rocked.

In testimony whereof I afiix my signature in presenceof two Witnesses.

OLAF O. MARTIN. Witnesses I J. GEISLER,

CECIL LONG,

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