US1598028A - Typewriter movement - Google Patents

Description

Amm 'i 9 1926 O. TYBERG TYPEWRITER MOVEMENT 3 Sheets-Shes?l 1 INVENTOR Aug. 3i l926 Lg v o. TYBERG TYPEWRITER MOVEMENT` Filed may 29, 192'; s sheets-sheet 2 Figi.

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OLUF TYBERG, F POINT LOMA, SAN DIEGO, CALIFORNIA.

TYPEWRI'IER MOVEMENT.

Application filed May 29,

'lhe object of this invention is to produce a series of new mechanical movements by means of which it shall be possible efciently to control the printing action of a type-carrier, which by the aid of some auxiliary power is normally in' a continuous state of motion, and thus to construct a typewriter or similar device capable of being operated Vith certainty, ease and speed.

TWith this and other objects inyiew the invention consists in certain constructions, improvements and combinations as will hereafter be fully described and then specifically pointed out in the claims hereunto appended.

is this invention is capable of a great variety of modifications, the typewriter here shown is one selected for the particular purpose of clearly illustrating the concrete embodiment of the invention, from which many features, otherwise essential to complete machine of this nature but unrelated to the subject matter of this invention, have been eliminated.

ln the accompanying drawings, consisting of three sheets, Fig. 1 is a frontelevation of a typewriter embodying my invention. Fig. 2 is a sectional side elevation of the same on rm-a of F ig. 1 showing the working in their normal position. F ig. 3 is a part of a similar section as Fig. 2 showing working parts in active operation. 'Fig'. l is a sectional top view of Fig, 3 on the lines 7 7. Fig. 5 is a part of a top view, similar to F ff ll., showing the working parts in posit. esponding to those in Fig. 2, Figs. are end and side views of the armed l and Fig. 8 is a sectional top view of the rotating carrier on the lines c-c of v1. f) D in'. L

2, mounted on top of it. Over q casing 2 is a plate 4l. Upon the iop oi plate -l is mounted another casing covered by another plate 6. All of said Ls are properly fitted and screwed toie rotary carrier Figs. 2 and maybe :nctediii any suitable manner; and 1s shown in the shape of a hollow cylinder 13,

1922. serial No. 564,644.

supported on a shaft 11 and mounted in the bearing 12. The bearing 12 is a hub formed in the center of thel pawl case 40, to be described hereafter. The upper portion of the hollow cylinder 13 has a cover 14, provided with a. tubular projection 15, fitted to turn in the upper plate 6, and acts as the upper sup-` port for the rotary carrier. The manner of revolving the rotary carrier may be done in any suitable manner; and the means here provided is an electric motor 16 (indicated by broken lines) and fastened to the bottom of the base plate 1, directly in line with the rotary carrier and connected thereto by means of a common shaft clutch 17. As indicated by arrow in Fig. 3 the motion of the rotary carrier is anti-clockwise. On the upper part of shaft 11 and directly beneath the hollow cylinder 13 is an enlarged cylindrical portion, which has been turned eccentrically to its own rotating' axis. Upon this eccentric 18 is mounted an armed sleeve 19, resting upon a `washer 31, and held in position by a. nut 32. The nut 32 rests against a washer 33, and supports the rotary carrier on the bearing 12. The armed sleeve 19 is mounted to turn freely on the. eccentric 18. lts arm 2O is provided with an abutment 21, and a hook 22. (Figs. l andV Upon the upper face of the sleeve proper of the armed sleeve 19 is a face cam 25, and upon the side of this same sleeve is a side cam 35, (this latter cam will be referred to hereinafter). Resting against the face'cam 25 is a roller 28, pivoted in an upwardly extending plunger 29, that is fitted to slide up and down through the hollow cylinder 13 and the cover 14. The upper end of the plunger 29 is provided with a. cap 30, made to embrace and slide up and down over the tubular projection 15. A roller 90, inountedon an arm 91, `which will be refeiredto hereafter, keeps tlie plunger 29 continually bearing against the cam face 25, and, because of the particular shape of this cam face, (Fig. 6) compels the plunger to come to a normal state of rest inits lowest position, and at the saine time compels the armed sleeve to always assume a state of normal rest in a delinite position on the rotary carrier. This position is indicated in Figs. 2, 5 yand 6. If

however the armed sleeve should be arrested by some extraneous force, the continuous mot-ion of the rotary carrier would compel the roller 28 to travel over the face cam 25, and cause an up and down motion of the plunger 29. The means employed tor controlling this action of the armed sleeve, and which may be widely varied in construction, will now be explained.

rfhe pawl case may be constructed in anyn suitable manner; as shown in my preterrcd Y construction I employ a circular casing 40, (Figs. 2 and 3) fastened to :the underside of the plate 4. The center portion of casing 40, as .has lalready been explained, acts uas tlie Ilower 'bearing for lthe rotary carrier. In the upper `part of the casing 40 are a series of radial slots, inwhich are lmounted a corresponding number of stop pawls 41, while on the outer circumference orf the pawl case, directly below and in line with the radial slots, are a 'similar :number of longitudinal slots, yin `which are `mounted the impulse pa-wls T54. upon studs lOl-mounted on top of base plate l-have theiriront end provided with keys 102, while the lrear end of each rests against the underside of a respective impulse pawl.

The stop pawls 4l have a sliding motion crosswise to Cthe axis of the orbital motion of the hook 22 of the armedA sleeve 19, for the purpose off larresting the same ina manner to be explained hereafter; normallythese pawls are maintained at rest outside the orbit of hook 22. just referred to, these'stop paw'ls 4l have also a rocking motion about the center 42, so as to perm-it their rear end, which projects downward and is provided'with -a nose 44, to Vrestagainst an angular shaped ring 43, which has been cut in `sections so as to be fastened lon a'shouloler formed `upon the pawl case 40, directly above the impulse paw'ls 51. A-spring 45 is provided for each stop pa-wl, and performs two functions, as it not only tends to dra-w the pawl inward ytowards the main anis, but also to keep the nose 44 down against the ring 43so as .to be gripped by the outei` edge of ring 43, thereby vkeeping the pawls lin their outward normal position of rest. j

The impulse pawls 5l are made .to slide up and down in their respective slots and have also a rocking motion about the center 52. A spring actuated plunger 453, bearing against the lower projection 54, keeps the `pawls in their normal downward position resting upon their respective keylevers 100,`

and at the Sametime, because ot their freedomto rock, lkeeps 'the upper portion 55 resting against the outer suriaceot the ring 43. The normal position of lboththe'stop pawls and the impulse. pawls are. shown A series of key levers .100, pivoted I-n addition to the'sliding motion mal positions, I rater to Fig. 5, which is the plan view corresponding to the position of the parts in Fig. 2, and shows the armed sleeve 19 in its normal position, but just ready to be arrested by the released stop pawl just referred to. In this view it will be seen that the center of the rotary carrier or the center of the continuous rotation is shown by the crossing of the d-iagonals -m Aand @-2, while the center of the eccentric lS is shown by the crossing of thediagonals fr-w and .tf- 37, so that relative t the center of rotation the center of eccentricity is directly opposite (on the diagonal m-m) to that of the position of the hook 22 of the armed sleeve mounted on this eccentric. It iollows that 'the diameter of the orbit described by hook 22 must always be smallest when the armed sleeve is maintainedl in its normal position on the rotary carrier. But as soon as the hook 22 is gripped by the released stop pawl, and the rotation ot the armed sleeve arrested, a radial motion is given -to the armed sleeve, produced by the revolving eccentric, which now causes the abutment 21 on thearm 2O to push against the stop pawl Athat is arresting the arm, so that bythe time the eccentric has made halt' 'a revolution, as shown in Figs. 3 and 4, this stop pawlhas been pushed back far enough to permit its rear nose 44 to be gripped againA by the edge of the ring 43, and cause I it to be restored to its inactive position. In Fig. 3 it will further be seen, that even if the linger should still be pushing the keylever down'and thereby holding the impulse pawl up,-because of the rocking motion of the impulse pawl, already referred to--the stop pawl is able `to push -the impulse `pawl backnso as to enable the spring 45 to pull the nose 44 down over 1the edge of the ring 43, and restore the stop pawl to its normal inactive position. It will also be understood that by the time the eccentric has completed one whole revolution from the time the armed sleeve was arrested, the hook 22 has been completely rreleased from the reset and now inactive stop pawl, and is therefore free to resume its normal positionon the rotary carrier, andy revolve alongY with it. Not until the impulse "pawl has been once ,more permitted to resume its normal position on the rear (or left) side of theunder the reset stop pawl, by the complete removal of the finger' from its corresponding key, can this same stop pawl be made active again, so that irrespective of the manner in which the keys are touched, each depression of a key arrests the armed sleeve 19 for only one complete revolution of the rotary carriel1 at a time.

The typewheel is provided with a number of characters on its circumference corresponding to the number of stop pawls in the pawl case. It may be provided with any suitable number of rows of characters as well, in the drawings are shown only two such rows. The typewheel is fastened to a flange 6l, which forms part 'of the typewheel shaft 62, concentrically mounted on the rotary carrier. The manner of mounting this typewheel shaft may be widely varied; as shown its upper end is supported in a bearing 64, which forms part. of a bracket 66, fastened to the top plate 6. The typewheel shaft 62 extends down through the tubular projection l5, and its lowest end 67 is pivoted in the bottom of the hollow cylinder 13, Di-

rectly above the pivot G7 a segmental gear 68 is fastened to thetypewheel shaft and above this gear is spiral spring 69. This spring bears against the bottom of the cover lt, and keeps the typewheel shaft in its downward position 'but free to move endwise as well as to swing on its bearings.

The typewheel control may be widely varied in construction; as shown it consists of a control shaft 72, mounted in the rotary carrier parallel with the typewheel shaft 62. To the control shaft is secured a segmental gear 73, which meshes with the teeth of the segmental gear 68. (Figs. 2, 8 and 8). The teeth of gear 73 are made wider, so as to permit the segmental gear 68 to remain in mesh with gear 73 whenever the typewheel shaft moves endwise. The shaft 72 extends down through a bearing in the hollow cylinder 13, and is there provided with an arm 74, upon the free end of which is a roller 75. The upper end of shaft 72 is supported in the cover 14, and on the shaft between the gear and the cover is a spiral tortional spring 7G, which keeps the segmental gear 73 normally resting against a pin 77, (Fig. 8) situated so as to permit the roller 75 to rest close to the circular portion of the armed sleeve 19. lt will thus be seen that the spring 76 through the segmental gears keeps the typewheel shaft and the typewheel normally at rest in a definite position on the rotary carrier; but permits the typewheel to be moved or rather oscillated on the rotary carrier by any intermittent motion applied to the arm Til. As soon as the armed sleeve is arrested by one of theV stop pawls, (as already explained) the continuous motion of the rotary carrier will move the control-shaft 72 with its arm 74 and roller 75 around the sleeve, until the roller reaches the side cam 35, (previously referred to and shown in Fig. l) when the roller and arm will be forced to swing outward, and through its connections with the typewheel shaft force the typewheel to revolve on the rotary carrier. (Figs. 3 and l show the control motion in action.) When the roller reaches the apex of the cam 35, the sping 7G will compel the rollerV to follow the descending incline of the cam, and permit the entire control mechanism to return to its normal position of rest until a new impulse is given. As may be seen the motion given to the typewheel by the rising portion of the cam 35 is one opposite to the motion of theI rotary carrier, it follows that if the shape of this cam-rise is proportioned accordingly, a motion ma be given to the typewheel, t-he speed of w iich will be equal to that of the rotary carrier itself, and being both opposite and equal to the speed of the rotary carrier must cause the typewheel to stand still in relation to any fixed point on the machine itself. Furthermore in view of what has already been shown, namely that each type on the typewheel has a corresponding set of stop pawls, impulse pawls and keys, it is possible by selection to make any particular type on the typewheel stand momentarily still opposite a given fixed point.

lt should therefore be understood that the mechanical movement disclosed by this invention is one based upon the fact that it is possible to subject a body to two independent motions of similar nature and acting in opposite directions at the same time, and further that when these two opposite motions are exactly equal, and as here shown applied to a rotated typewheel, this wheel will be made to stand still upon its own axis while actually in a state of ro-V tation.

It should also be explained that in case it is found desirable to make the typewheel contact a movable platen,-as might be necessary, if for instance the paper is actually being fed forward during the printing action-the typewheel would merely have to be momentarily retarded in its motion, and hence subjected to two unequal motions in opposite directions at the same time, so re` lated to each other as to make the motion of the wheel coincide properly with the moving platen at the time of printing.

rlfhe platen may be constructed in any suitable manner; as shown it is made in the form of a hammer 92, pivoted to the plate 6 at 93, and held inits normal position of rest away from the typewheel by the spring 94. The upper end of the hammer is adapted to press the paper against the typewheel. Its lower end 96 bears against a pin on the arm 97 of a rockshaft 98. On

this rockshaft is another yarm 91 with Ya roller 90, alreadyv described Vas resting against the cap 30 of plunger '29. Thenever the armed sleeve 19 is stopped 'by one of the stop paw'ls el, the plunger 29, which isv mounted in the continuously rotating carrier, -will be made to travel over the 'face cam 25. This cam is so Vshaped as to time correctly `with the typewheel controlY motion, so as -to make the plunger 29 `push the hammer 92 against lthe ltypewheel while itis momentarily standin-glstill in relation to the platen. As shown `in Figs. '-3 and i the plunger reaches its vhighest -p'oint exactly at the time when thc ,rising portion .of cam 35 -is in th'egact moving the l'arm 'T4 and roller lof the control shaft 72, which as already described causes the typew'heel to stand still in relation to the platen.`

'The typewheel shift may be constructed in any suitable manner; as shown in Figs. 1 and 2 it consists of a roller :60,monnted `on the end -of a lever 81.@ This :lever is pivoted -at 82 on a 'lug cast -on the 'bracket 66. Attached to the other yend of le ver 81 is a rod t83, 'connecting this leverwijth the arm Stof a -rockshaftpivoted srt-65, between lugscast on the casing 5. l The other arm 86 of this rockshaft is ,connected 'by rod87 to thenbell crank 88, pivoted at 89. rThe lower end of this bell crank `88 .constitutes the keylever upon which the shift key 99 is fastened. rBy the depression of this key the typewheel shaft may be raised while rotating, so as to bring the Vlower row of types in line with the platen. y

The carriage `may be constructed in any suitable manner. As shown it consists ,of two feed rollers 105 and 106. -The roller 105 is mounted in bearings 107, which are connected at the rear by a bar 108 and at the' front by a rod 109. The roller 106 is oar= ried i-n a rocking frame 110, pivoted at its lower end to the end pieces 107. A spring 111 holds the roller 106 against the roller 105. The paper is coiled up in the` paper holders 112, and is fed up through the rollers and then passed between Vthe hammer rand the typewheel. The carriage is supported at the rear by grooved rollers 113, mounted upon brackets 114, fastened to the top `of plate V6. In front of the carriage a forked arm 115, forming part 'of the bearing 64, straddles and guides the rod 109.

The carriage action may be of any suitable construction. e On a bearing 120, forming part of the bracket 66 is mounteda gear 121, meshing with a rack 122, fastened to the end pieces 107. The gear 121 is provided with a spring case 123,in which is mounted a spring 124e, normally tending to force the carriage in one direction. vUpon a rockshaft 125, mounted in the bracket 66, isl attached the. solid pawl 126 and the yielding pawl 127, constituting a common escapement.

downward extending arm128 of rockshaft 125 4contacts an `arm y129 on the rockshaft 98, so that with-eachl motion of this rockshaft 98, as already described, the carriage is permitted to advanceone step.

TWhenever it is desired to feed the carriage without` printing,v.a` space bar 130 iis provided. 'Thisspace bar is ymounted on arms 131, pivoted in lugs 139 on the front part of casing 2, A(Fig. l1.) and through its upward extending lever arm 132 and connecting rod 133, is connected .with the lower lever arm 184, pivoted at 135. The :upper lever arm '136 carries a pushrodn137, which is cade to act uponv the arm 13S ofthe rockshaft :125, Through these connections the carriage ymay be Afed step by stepv with each depression ofthe space bar.

As already stated, a variety .of changes nay be made in the yinstrumentalities here shown for lcarrying into effect my invention, and` l do not wish to be limited to the particular design, since the gist vof my invention rests 'in the ybroad Iideaof providing certain original mechanical movements .for controlling the printing actionv in va power driven typewriter or similar device, as herein set forth.

ln regard to the soundness and lpractical utility of this invention, Vit may be proper to state here that this application has been w itten on an experimental machine embodying these identical mechanical :principles, and that it was written while vthe rotary carrier herein described rwas 'being revolved at the rate Vof 1200 revolutions 'per minute.

Having thus fully described my invention, what l claim as ynew and useful is: f

1. The combination of ya continuously rotating carrier, an armed sleeve -movably mounted yon rthe Aaxis Vof said carrier and normally revolving with said vcarrier in a del-i` nite position thereon, a stop-pawl, and means including a key for throwing said stop-.pawl

into the 4path ofthe arm of said armed sleeve and intermittently arresting the motion. of

said armed sleeve kfor only a single rotation f ata time independent of the -release of the key action. y

2. The combination of a continuously rotating carrier, an armed sleeve movably mounted .on the axis of and normally re volving withV said carrier ina definite position thereoin'a stop-pawl' normally out .of engagement with the arm of said armed sleeve, means for pushing said stop-pawlv into the path of said arm, and for pushing said stop-pawlv back into normal position before said carrier has completed onev rotan tion from the moment of engagement between said arm and said stop-pawl.

3. The combination of a continuously rotating carrier', an armed. sleeve movably AV mounted on a cylindricpart `of said carrier eccentrically situated with reference to the axis ot said carrier and normally revolving` with said carrier in a definite position thereon, a stop-pawlnormally out ot engagement with the arm of said armed sleeve, n cans tor pushing said stop-pawl into the pathot said arm, and for pushing said stop-pawl back into normal position betere said carrier has completed one rotation from the moment ot engagement between said arm and said stop-pawl.

t The combination of a continuously rorating carrier, a movable armed sleeve eccentrically mounted on the aXis ot said carrier and normally revolving with said carrier in a definite position thereon, a series ot stop-pawls grouped around said `carrier and normally out of engagement with the arm or" said armed sleeve, means for throwing any selected stop-pawl into the path oit said arm, and means for pushing said stop-pawl back into normal position before said carrier has completed one rotation from the moment of engagement between said arm and said stop-pawl.

5. The combination of a printing mechanism, a continuously rotating carrier, a movable armed. sleeve eccentrically mounted on the axis of said carrier and normally revolving with said carrier in a definite position thereon, a selecting device for intermittently arresting the motion ot said armed sleeve at different points of the rotation, and mechanism controlled by said armed sleeve while arrested `tor operating said printing mechanism.

6. The combination ot a printing mechanism, a paper feed, a. continuously rotating carrier, an armed sleeve movably mounted on the aXis ot said carrier and normally revolving with said carrier in a detinite position thereon, a selecting device :tor intermittently arresting the rotary motion ot said armed sleeve at different points of the rotation and` for only a single rotation at a time, and mechanism controlled by said armed sleeve while arrested tor operating said printing mechanism and said paper iieed.

7. The combination ot a continuously rotating carrier, a typewheel pivoted and normally resting in a definite position on said carrier, mechanism for giving said typewheel a cylindrical reciprocatingmotion on said carrier at diiterent points of the rotation, and a selecting device for actuating said mechanism at will.

8. The combination of a continuously rotating carrier, a typewheel concentrically pivoted and normally revolving with said carrier in a delinite position thereon, positive movable connections between said typewheel and said carrier, and means tor giving the typewheel an intermittent rotary movement in the direction opposite to that ot'the'carrier at different pointsof the rotation, and a selecting device for actuating ously rotating carrier, a typewheelnormally resting in a denite position on said carrier, mechanism mounted on said carrier for intermittently moving said typewheel on said carrier so as to momentarily cause any type on said typewheel to stand still opposite the platen, and a selecting device for actuating said mechanism at will.

l0. The combination of a platen, a typewheel concentrically pivoted and normally resting in a dei'inite position on a continuously revolvingcarrier, mechanism for giv- "ig said typewheel a cylindrical reciprocating motion on said carrier at different points ot the rotation, mechanism for simultaneously producing contact between said typewheel and said platen, and a selecting device tor actuating .said mechanisms" at will.

11. The combination of a platen, a typewheel having a multiple series `oli-characters and resting in a definite position on a continuously rotating carrier, means for bringing' any desired series of characters in line with said platen, self-restoring 4mechanism mounted on said carrier tor oscillating said typewheel on said driver at different points of the rotation, mechanism tor simultaneously producing contactbetween said typewhee'l and said platen, and a selecting device for actuating said mechanism at will. y

l2. The combination ot a typewheel and an armed sleeve both independently pivoted and both normally resting in delinite positions on a continuously rotating carrier, means for intermittently arresting said armed sleeve at ditlierent points of the rotation, and means mounted on the carrier and controlled by said armed sleeve while arrested tor oscillating said typewheel on said driver. y

13. The combination of a continuously r0- tating carrier, a concentrically mounted 'typewheel and an eccentrically mounted armed sleeve both normally resting in definite positions on said carrier, means :tor intermittently arresting said armed sleeve `tor only a single rotation at a time, and means controlled by said armed sleeve while arrested for oscillating said typewheel on said driver.

14. rlhe combination ot a platen, a continuously rotating carrier, a concentrically mounted typewheel and an eccentrically mounted armed sleeve both normally resting on said carrier, means for intermittently arresting said armed sleeve, and means mounted on said carrier and controlled by said armed sleeve while arrested for moving said typewheel on said carrier and simultaneously producing contact between said typewheel and said platen.,

15. The combination of a platen a type- Wlieel and an armed sleeve both independently pivoted and both normally resting on a continuously rotating carrier, means` for vintermittently arresting said armed sleeve at different points of the rotation and for only one single rotation at a time, and means controlled by said armed sleeve While arrested for moving said type- Wheel on said driver and simultaneously producging contact between said typewheel and said platen. s Y

16. `.The combination of ya continuously rotatedA Wheel, and means for intermittently subjecting said Wheel to an additional, in- .dependent motion of similar nature to that of the continuous rotation but acting in op posite direction for the purpose of chang'- ing the motion of said Wheel around its own axis. Y

17. The combination of a continuously rotated Wheel, and meansV i'or intermittently subjecting-said lWheel to an additional and identical motion in opposite direction to that of the continuous rotation for the purpose of arresting said Wheel on its owny axis at any desired point of its rotation.

18. The combination of a rotating driver, a movable.` arm normally rotating with said carrier, and a series of pawls for intermittently arresting the motion of said arm at different points of the rotation each oic said pawlsv being so shaped andYmou-nted as to y be capable of a combined sliding and rocking action controlled by a single spring Vfor yeach pawvl. Y

19. The combination of a continuously rotating carrier, an armed sleeve eccentrically mounted thereon, resilient means mounted in said carrier for normally holding said Aarmed sleeve in a definite position thereon, and means for intermittently arresting the motion of said armed sleeve.

20. The combination ot a continuously rotating carrier, an armed sleeve eccentrically mounted thereon, a. spring actuated plunger uously rotated typeWlieel, a key/controlled selectingdevice for intermittently subjecting said typeivheel to an additional motion in opposite direction to that of the continuous rotation,and means for simultaneously producing contact between said t"pewheel and said platen.

23. The combination of a continuously rotated carrier, a typeivheel concentrically mounted on said carrier, a cam-controlled shaft independently mounted on said carrier .and operatively connected to said typevvhcel,

and a key-controlled selecting device for operating said shaft at different points oit Vthe rotation.

24. The combination of 'a platen, a con- .tinuously rotated carrier, a typeivlieel concentrically mounted on said carrier, a camcontrolled shaft independently mounted on said carrier yand operatively connected to said typeivheeha keyecontrolled selecting device. including a cam for intermittently operating'said shaft at different points of the rotatioin'and means for simultaneously .producingcontact between said typewlieel and .said platen. l

Signedrbv me at Point Loma, city and .county of San Diego, State of California,

this 1st day ot May, nineteen hundred twenty tivo. f

OLUF TYBERG.

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