US546067A - johnson - Google Patents

Description

(No Model.) 4 Sheets-Sheet 1.

O. E. JOHNSON. RIBBON FEED REVERSING MECHANISM. I No. 546,067. Patented Sept. 10, 1895.

(No Model.) 4 Sheets-Sheet 2.

C. E. JOHNSON. RIBBON FEED REVERSING MECHANISM.

No. 546,067. Patented Sept. 10, 1895.

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N0 Model.) 4 Sheets--Sheet 3.

C. E. JOHNSON. RIBBON FEED REVBRSING MECHANISM.

No. 546,067. Patented Sept. 10,1895.

EiiillME 1, A WEI H 1 a 40mm WITNESSES.

4 Sheets-Sheet 4.

(No Model.)

0. E. JOHNSON. RIBBON FEED REVERSING MECHANISM. No. 546,067. Patented Sept. 10; 1895.

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Gha/rZe/sE. John/801v UNITED STATES PATENT OFFICE.

cnAfiL'Es E. JOHNSON, OF'IMOUN'I JACKSON, AssIGNo TO THE JOHNSON I NOVELTY COMPANY, or InDI 'NAPoLIs, INDIANA.

RIIB'BQN-FEED-REVERSING MECHANISM.

SPECIFICATION forming 5m of Letters Patent No. -54e.oe7, dated September 10, 1895. Application filed November 6| 1894. Serial No. 528.038- (No model.) I

To all Iohom} it concern/f I I Be it known that 1, CHARLES E. J onnson, a citizen of the United States, residing at Mount Jackson, in the county of Marion and Reversing Mechanism, ofwhich-the following State of Indiana, have invented certain new and useful. Improvements in Ribbon-Feedis a specification.

My present invention principally consists in an improved apparatus whereby the ribbon-feed in type-writing machines is reversed automatically each time the ribbon becomes unwound from oneof its spools; and it further consists in combining therewith the trans; verse ribbon-feed attachment, so that it shall be operated from said automaticribbon-feedreversing mechanism.

While with certain structural modifications my invention isapplicable to use with any typewriter of this'general constr'uctionfl haveselected for purposes of illustration the machine known as the Remington. In the drawings. however, I have omitted much of the type-writer mechanism which is not especially related to my said invention; but in all cases the regular Remington construction may be understood. I

Referring, to the accompanying drawings, which are made a part hereof, and on which similar letters offreference, indicate similar parts,Figure 1 is a top or plan view of atype-v writer providedwith my improved apparatus, the position of the carriage thereon being indicated for the most part by means of dotted lines; Fig. 2, a horizontal sectional view im mediately below the plate forming the upper part of the framework of the type-writer, the position of said plate being indicated by dotted lines; Fig. 3, a vertical longitudinal sectionalview through the'npperportion of the type-Writeryas seen when looking upwardly .from 'the dotted line 3 3 in Fig. 2; Fi 4,- a detail sectional view, on'an enlarged scale, as I seen from the rear side of the ribbon-feed shaft, the view being broken back at a central point to showthe bar connecting the two ends of my apparatus and that portion of the frame to which .it is connected in section; Fig; 5, a view substantially like Fig. ,4, .except that some of the parts are shown in a different position; Fig. 6, a. perspective view of the lever one end of the spool and the attachments by which said release is ettected; Figs. 7 and 8, detail views showing the form of the pawls on the-spools, through which the releasing devices are operated; Fig. 9, sectional views illustrating two positions of the uppe" end of thelever atone end of themachine, forming part of. the shifting mechanism; Fig. 10, an end elevation of a portion of the machine; Fig. 11, a. detailhorizontal sectional view similar in some respects to a portion of Fig. 2, but on a larger scale and taken at a little .ditferent-point; Fig. 1 2,atop or plan view, on

a larger scale, of one end'ot the shifting-bar shown in full in Fig.1 and in its'other position from that shown in Fi 1; and Figs. 13

and 14, detail transverse sectional views, as seen from the'dotted lines 1313 and 14 14, re-

spectively, in Fig. 12.

In said drawings, the portions-.piarked'd represent the framework; B, the traveling carriage; (J, the ribbon-spool shafts; D, the

shaft which drives the ribbon-spool. shafts;

by which the connecting-bar is released at.

E, abar extending from end to end of the machine and connecting the shifting mech-'- anism at the two ends; F, a lever by which the shaft D and bar E are moved in one direction; G, a detent by which said bar is held to the positionto which it is moved by the lever F; H, a spring by which when the detent G is released the mechanism is moved to the other position; I, a lev'er by which the detent G is operated; J, a-shifting pawl on one ribbon-spool by which the lever I is operated; K, a lever by which the catch on the upper end of the lever F is-operated; L, a

shifting pawl on the other ribbon-spool, by

which .the' lever K is operated; M, an operating device attached to the traveling carriage, by which the lever F is operated at the appropriate time; N, a crank-wheel operated from the bar E, by which the mechanism for moving the ribbon transversely is automatically operated, and O the ordinary rock shatt ofsaid last-named mechanism.

The frame A and carriage-B are among the parts which are or may be of the ordinary construction, as are also, in themselves, the

shafts O and I), and the rock-shaftO and attached parts are also common to many type- [too i writing machines. Upon theshaftsC are the ordinary spools C and C but arrangedwvithin the heads ofsaid spools, as shown most plainly in Figs/7 and 8, are the pawlsJ and L. The ribbon R runs from one spool to the other, as usual, and is of the ordinary width; but the tape T, as shown most plainly in Fig. 6, is narrower than the ribbon, leaving a portion of the spool exposed when the ribbon is unwound therefrom. The pawlJ hasa projectionj and the pawl L has a projection Z, and these projections extend out in position to be exposed when the ribbon is unwound and occupya portion of the space left naked on the spool because of the narrowness of the tapes T. Thus said pawls are free to play back and forth when only the tape is on the spools, butare adapted to be forced in,so that the projectionsj and Z will be close to the body of the spool when the tapes are wound up and the ribbon bcginsto wind. These pawls, which fall out when released by the unwinding of the ribbon and come in contact with the levers I and K, are the means by which the mechanism which causes the shifting to take place is operated, as will hereinafter be more fully described.

The bar E extends from end to end of the machine, just on top of the frame Aa-nd below the traveling carriage B. As a whole, it is best shown in Fig.1,where itis shown as secured to the frame A by the attaching-screws a a, passing through slots in saidbar and entering said frame A. These attaching-screws are so adjusted that said bar E may slide freely back and forth on the frame a distance equal to the length of the shortest screw-slot in said bar. As shown in Fig. 1, at the righthand end, the lever F extends up through a slot in said bar E and engages with notches in the sides of said slot, and thus as said lever is moved back and forth said bar is caused to move correspondingly. At the left-hand end the .bar E is so constructed and provided with such attachments that it may operate the devices by which the ribbon is given its automatic transverse movement, as will be hereinafter particularly described, and at the same end is the projection e, extending into a continuation of the slot through which the attaching-screw it passes, with which the detent G will engage.

The lever- F, as best shown in Figs. 1 and'4, is mounted on a pivotf in a downwardly-projecting bracket A 'on the frame A and is bifurcated and passes astride the shaft D just behind the collar or hub 01 thereon, and thus as said lever is moved toward that end of the machine nearest which it is situated, its operations are to force the shaft Diongitudinally and the pinion (1' thereon into engagement/ with the pinion c on the adjacent spool-shaft (3. As shown in Figs. 4 and 9, (particularly in the latter,) there is a shifting contact-point mounted, by means of a pivotf and a slide F on the upper .end of this lever F. The purpose of this is to enable the operating device ill to either operate this lever or pass freely over it, according to circumstances-'- that is, when the parts F and F are in their the bar E, said lever being in engagement with those parts, as previously. stated. The part F is mounted on the pivot f, so that it may be easily tilted by thedevice M on its return movement, if it should not have fallen back to its lower position by the time of such return movement. The bar E is held in the position to which it is forced by the lever F by the detent G, as will be presently described. The engaging or contact point F of this lever is raised into the path of the device M by the operation of the pawl L, acting through the leverjK, as will be hereinafter more fully. de-

scribed.

The detent G is a spring-detent, and is so mounted within the slot in'the bar E as to be held from lateral movement thereby, and it serves to engage with the projection e when the bar is in proper position and holds said bar to such position. It may be secured at any desired point; butl havemfonndnit convenient to secure it to the upper end of the shaft N in,such a manner that while such shaft may revolve independently thereof it will hold said detent down to its work, as best illustrated in Figs. 4 and 5, said detent being held in place by a screw g, which enters a perforation in the upper end of said shaft.

The operation is as the bar E is moved endwise by means of the lever F that this detent G will drop down behind the projection e, and thus hold said bar E to the position to which it has been thus moved, hotwithstanding the tendency of the spring H, through the shaft D and lever F, to return it to the position from which it has been forced by the operating device M. The tapered or sloping character of the under side of this detent G near its extreme end permits the detent to be raised by the projection e as it passes under it in the direction in which it is forced by the lever F, while its outer end, being square or abrupt, engages with said projection e and thus effectively holds the bar E.

The spring H, as best shown in Fi s. 4 and 11, surrounds the end of the shaft and is secured between an arm A on the frame A (which is secured to said frame Act the same point the catch for holding'the bar D to a certain position has heretofore been located) and a hub or collar on said shaft, which may be the hub of the crank D. The operation of this spring is to normally hold the shaft!) into that position where the pinions d a will be in engagement, or, in other words, to act I ions (1 into engagement.

reversely to the operation of the lever F when he device M comes in contact therewith. Vhen the bar E is released by raising the detent G, saidspring II will operate to throw the pinions d c out of engagement and the pintherefore, normally hold the parts to the positions indicated by dotted lines inFig. 4, except when they are forced to the positions indicated by the full lines by the lever F and there held by the detent G.

The lever I is secured by the pivots i to suitable points on the under side of the upper portion of the frame A and has a projecting point 1', arranged to raise the detent G out of engagement with the projection e on the bar E. .Normally this leverI remains down in the position shown in the other drawings, free from contact with the detent G, but is operated upon occasion by the pawl J, at which times the detent G is forced upwardly, as shown in Fig. 5 and as above described.

The pawl J is mounted on the spool-shaft 0 just inside the head I on the spool 0 thereon, and is slotted so as to move back and forth on said shaft. A flattened extension 2 on the inner surface of the spool-head 1 serves to prevent said pawl from revolving. The slot is notched on one side, as shown in Fig. 7, so that when the pawl moves outwardly it will be held there until the spool has made substantially a complete revolution, and thus the pawl is held firmly into that position which causes it to operate on the lever I until it has passed the point where its operation on said lever is effected, and which operatiou, as before stated, is to raise the lever I, and through it the detent G, thus releasing the bar E and permitting the spring II to operate. This shifts the engagement of the pinions on the shafts O and D, as above stated, and starts the ribbon R to travel in the reverse direction, and said ribbon coining presently into engagement with the projection j on the pawl J draws said pawl inwardly again, (it having by this time revolved to that point where it is free from the detent projection 2,) and said ribbon holds said pawl from falliug out again until it has been wound up, and again unwound, when it is free to fall out to the position shown in Figs. 6 and 7, and the operation is repeated.

The lever K, as best shown in Figs. 2, 3, and 1, extends transversely across the machine, being pivoted at one end to the hanger A on the under side of the ripper portion-of the Iraine A and extends thence across the ribbon spool at that end of the machine, passing close alongside the lever F, and is adapted go be operated upon occasion by the pawl F F when it is itself raised by said pawl L, thus throwing the contact-point F up into the path of the operating device M. A springdetent K serves to support the sliding streeture F F in the position to which the lever K has raised it until the lever, includingsaid Said spring will,v

Its oilice is to raise the sliding structure structure, has been forced over by the device M, which pushes it clear of said detent K, when upon release of the pressure thereof said device F F will fall back to its lower position. The spring-detent K is secured to the same portion of the frame A that the bracket A is secured to, as shown most plainly in Fig. 4.

The pawl L ,"n its general form and arrangement is similar to the pawl J, and is operated in a corresponding manner. It is shown as provided with three engaging-points instead of one, so that one of said points will be certain to engage with the lever K. A single point would usually be sufficient; but I have provided three for greater certainty. Said pawl is located just inside the head 3 on the spool C and is held out at the proper point and for the proper time by the flattened extension4 in the same way that the pawl J is held by the corresponding extension 2.

The operating device -M on the traveling carriage B is similar in form and function to the corresponding device shown, described, and claimed in my Letters Patent No. 512,584, dated January 9, 1894, (wherein it is denominate'd an abutment,) differing only in detail construction. Its office is to operate the lever F whenever its contact-point .F is projected up into the path of said device. This, as previously indicated, only occurs when the unwinding of the ribbon R has released the pawl L, so that the contact-point F has'been other times this device M passes back and forth free of contact with any part of the mechanism.

The crank-wheel N is mounted on the lower end of the shaft N, upon the upper end of which, as shown most plainly in Figs. 5 and 12, is a ratchet-wheel N which ratchet-wheel is adapted to be operated by the reciprocation of the bar F through a spring-pawl e forming a part of the U-shaped structure I) secured thereon, the wheel N being positioned between the bar E and the structure E as is shown most plainly in Fig. 13. An edge e, forming a part of the same structure, serves as a detent and prevents the spring-pawl e from pulling the ratchet-wheel N back in its return movement, as will be readily underpecially Figs. 12 and 13. Said crank-wheel N is eonnlected to and drives the mechanism by which the ribbon is given its transverse movement, and thus said mechanism is operated automatically instead of by hand, as has heretofore been usual.

The rock-shaft O is or may be identical with that common to the Remington type-writer, and is provided with the usual arms 0', and these in turn are connected with the usual bars 0 which are provided with arms 0 by which the ribbon-spool is slipped back and forth on its shaft. At one end the bar 0 is connected to the crank-wheel N, and is thus given its movement, as has already been deoperated therefrom through the lever K. At

stood by an examination of the drawings, es- 1 IIO scribed. Otherwise this mechanism is of a usual form and arrangement, which is not peculiar to my invention, and being easily understood will notbe further described herein.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is- I 1. The combination, in a ribbon feed reversing mechanism for typewriting machines, of the ribbon spools, the ribbon runn-ing betweem said spools, tapes immediately connected to said spools of a less widththan the winding surface thereof, pawls mounted in said spools just inside the heads thereof and provided with projections which extend out over that portion of the winding surface of said spools left uncovered when theribbon is unwound alongside the narrow tape thereon, and mechanism for shifting'the ribbon feed adapted to be operated'by said pawls when extended, whereby said mechanism is adapted to be operated when the ribbon is unwound at each end respectively, and prevented from being operated so long as any-ribbon remains on said spools, substantially as set forth.

2. The combination, in a ribbon feed revers-' ing mechanism for 'typewriting machines, of

the ribbon-spool shafts, the ribbon spools thereon, a shaft extending between said ribbon-spool shafts and adapted to drive one or the other alternatively, a spring adapted to throw said ribbon spool shaft in one direction,

a lever engaging with a hub 91 ,QQllal! on said.

shaft and extendingup into the path of an operating device on the traveling carriage, a sliding contact point on said lever, a second lever adapted to operate said sliding contactpoint, and a pawl on the corresponding ribbon spool adapted to automatically move into position to operate said lever when the ribbon is unwound, substantially as set forth.

3. The combination, in a ribbon feed revers ing mechanism for typewriting machines, of a lever for moving theshaft which operates the ribbon spools, a sliding contact point onv said lever, mechanismfor operating said sliding contact-point, and a spring detent K for supporting said sliding contact-point until moved by an appropriate operating device, and said operating device.

4. The combination, in an automatic ribbon feed reversing mechanism for typewriting machines, of the ribbon spools, the shaft extending between saidribbon spools and serv-' ing to operate them to run alternatively in opposite directions, a lever for moving said shaft in one direction, a spring for moving said shaft in the other direction, a bar eX-tendinglongitudinally olthe machine and adapted to be moved by said lever, a detent G at the other end of the machine from said lever, another lever positioned below said detent, and a pawl held out of engagement by the ribbon and released and permitted to drop into operative. position when the ribbon is unwound for operating said lever and through it said detent, substantially as set forth.

5. The combination, in a ribbon-feed reversing mechanismfor typewriting machines, of the shaft which extends between the ribbon spool shafts and by which they are alternatively driven, a lever engaging with said shaft and extending up toward the path of the carriage a movable contact point on said lever adapted to be thrown into the path of the carriage when the ribbcnis unwound by which the first named shaft is moved longitudinally in one direction, a spring by which said shaft is moved longitudinallyin the other direction, a sliding bar with which said lever is engaged, and a detent engaging with said bar whereby the mechanism will be held in the direction to which it has been operated by said lever until said detent is released- 6. The combination, with an automatic ribbon feed reversing mechanism for typewrit- ;ing machines, and the mechanism for moving the ribbon spools transversely; of arecip- I rocating sliding bar operated from said ribbonfeed reversing mechanism, a crank shaft mounted in the frame-work of the. machine .helowioneend of saidb udnr ided .with .r. it a ratchet wheel on theupper end and a crank or wrist on the lower. end, a pawl on said reciprocating bar, and-a pitman connecting said crank to said mechanism for moving the ribbon spools transversely, said parts being ar ranged and operating substantially as set forth.

7. The combination, with an automatic ribbon feed reversing mechanism for typewriting machines, and the mechanism for moving the ribbon spools transversely; of the reciprocating bar E provided with the spring pawl e, the shaft N having the ratchet wheel N on its upper end with which said pawl engages, and the crank or crank wheel N on its lower end, and the bar or pitman 0 extending from said crank to said mechanism for moving the spools transversely, substantially as shown and described. t

In witness whereof I have hereunto set my hand and seal, at Indianapolis, Indiana, this 1st day of November, A. D. 1894.

CHAS. E. JOHNSON.

Witnesses:

CHESTER. BRADFORD, JAMES A. WALSH.

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