US935280A - Ribbon-shifting mechanism. - Google Patents

Description

c. SPIRO RIBBON SHIFTING mncgmsm. APPLICATION FILED IMAYHZB, 1909.

9355280, Patented Sept. 28, 1909.

2 SHEETS-SHEET 1.

Affomey O. SPIRO. RIBBON SHIPPING MECHANISM. APPLIOATIQN 11.31) MAY 26, 1909.

Paganini! Sept.28,1909.

Al/orney CHARLES SPIRO, QF NEW YORK, N. Y.

RIBBON-SHIFTING MECHANISMI.

Application filed May 26, 1,909. Serial No. 498,566.

To all whom it may concern:

Be it known that 1, CHARLES Srnzo, citi-Z zen of the United States, residing at New York, county of New York, and State of New York, haye invented certain new and useful Improvements in. Ribbon-Shifting Mechanism, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a ribbon shifting mechanism, and particularly to means for varying the extent of-movement of the ribbon and, adapted for use in connection with polychrome ribbons so as to present either .color thereof in the path of the type bar.

The invention has foran object to provide a novel and improved construction by which the extent of travel of the ribbon vibrator:

may be varied, and comprises a rock shaft vibrator.

A further obyect of the invention is to provide means by which the ribbon vibrator may be connected and disconnected from the rock shaft so that in the depression 'of the key lever the ribbon is not. shifted into the path of the key which condition of use is most convenient in mimeographing.

()ther and'further objects and advantages of the invention will be hereinafter fully set forth and the novel, features thereof defined by the appended claims.

In the drawing .'Figure 1 is a central vertical section showing the application of the invention; Fig. 2 is a detail bottom perspective of the rock shaft connections Fig. 3 is a horizontal cross section of these parts; Fig.4 is a detail enlarged section on line 44, Fig.5; Fig. 5 is a vertical section on line 55, Fig. 4; Fig. 6 is a detail perspective of the connecting bar for the ribbon vibrator; Fig. 7 is a diagram showing the path of. the type relative to the ribbon in difi'erent adjustments of the vibrator.

Referring to the drawing, 10 designates the frame of a typewriter which may be of any desired construction or configuration and in which the key levers 11 are pivotally mounted at 12 and held in elevated position by means of springs 13. These key levers control the type bars in the usual manner. Beneath the levers l1 and pivotally mounted provided with a lever arm having a bail mounted thereon for movement toward and from the pivot of said shaft and adapted to be engaged by the key lever to thus determine theextent of oscillation of the ribbon comprising the pivoting of the bail by means in the frame is a rock shaft 14 having the lever arms 15 upon which the universal bail or bar 16 is mounted and is normally held in contact with the key levers by means of the tension spring 17 connected to one of the lever arms. This rock shaft is also provided with the'central' arm 18 ,to the side face 1.9 of which'the usual dog mechanism 20 isattached, as shown in Fig. 1. The dogmechanism coiiperateswith an escapement 21 in Specification oi Letters Patent. Patented Sept. 28, 1909,

the usual manner to control the travel of For the purpose of varying the extent of oscillation of the ribbon vibrator 26 the bail is movably mounted upon the lever arms of the rock shaft, one form of such mountlng of the lugs 27 extending therefrom to receive the pivot 28 at the outer end of the lever arm. The bail thus swings toward and from the axis of the rock shaft, and for the purpose of allowing that movement the under face of the key levers may be recessed. as shown at. 29. The central arm 18 isprovidcd upon its under surface with a depending lug 30 to receive the pivoting lug 27 from the bail, and the upper face of this arm is formed with a recessed portion 31 having the opposite contact walls 32 and 33, as shown in Figs. 1 and 5, which provide a firm support for the bail 16 ineither of its adjusted posit-ions.

The rock shaft 14 is provided with a. series of pivoting lugs34 at the opposite side from the arm 18 and between these lugs the ribbon vibrator arm 26 is pivotally mounted upon the bolt 35. Intermediate of these pivoting lugs is an extended locking member 362*provided with a longitudinally extending slot adapted to receive the connecting bar 37 which also passes through the slots 38 in the angularly disposed ends 39 of the ribbon shift levers 26. This connecting bar 3?, as shown in Fig. 6, is provided with slots 40 and 41 through which the screws or pins 42 and 43, respectively, pass to retain the bar in proper position and limit the travel there-11 44 from the rock shaft 14. The outer end of the bar 37 is depressed and formed witha hand hold45 by which it may be conveniently shifted. This bar is also provided with a cutaway portion 46 adapted to be shifted in alinement with the short finger 4L7 dis osed at one side of the slot 38 of the ribbon vibrator. When in the position shown in Figs. 4 and 5, the free end of the bar 37 is withdrawn from one of the slots 38, while I the slot 46 inthe bar is brought into aline ment with the finger 47. The vibrator lever 26 is of usual construction and adapted to contact with the frame at18 when at rest. When shifted in the opposite direction the pawl 45) carried by the lever 26 engages and feeds the ratchet wheel 50 thus producing through the usual connections a step by step movement of the ribbon spool 51 from which the ribbon 52 passes through the ribbon holder 53 to the opposite spool in the usual one end of the bail, this connection being of a loose character by means of the spaced nuts 59 wlnichpermit the swinging movement of thebail. The bail in-its downward move ment contacts with the spring arm (30 which is attachedto the rear of the machine frame and guided in its movement by a depending post M. This arm effects a yielding or cushioning movement in the depressionof the bail through the key levers.

Fig. 7 diagrammatically illustrates the path of the type upon the ribbon 52. When the bail is adjusted at its greatest distance from the axis of the rock shaft the shortest extent of vibration of the ribbon arm is secured and impression is made upon the portion 62 of the ribbon, which is preferably used for the black impressions. YVhen the bail is adjusted at its position closest to the pivot, the longest vibration of the shaft lever is secured and the portion 63 of the ribbon is brought into the path of the type bar. When it is desired to operate the typewriter without any impression from the ribbon the conne'cting'bar is pulled outward to disconnect theribbon vibrator from the'rock shaft and therefore no impression is made upon the ribbon,.as in mimeogra hing work. i

In the operation of the machine, the bail is normally shifted at its position farthest removed from th'e arm of the rock shaft so as to'produce the shortest area of vibration, and in this position the bail contacts with i g .the cushionin sprin When it is desired to change the col b or, the bail is shifted from the I full line position, shown in Fig. 5, to that indicated by dotted lines, thus moving the point of contact with the key lever nearer the axis of the rock shaft'and producing a longer vibration of the ribbon shifter to present the color desired in the path of the type. It will be obvious that the degree or extent of this movement of the bail may be varied relative to the areaof color of a polychrome ribbon. When it is desired to avoid an impression on the ribbon, as in mimeographing work, the connecting bar may be shifted to disconnect the ribbon shifter from operation by the rock shaft and bail. These partsare' adapted to be operated by conven- I iently disposed means at one side of the machine, and the mounting of the bail to' shift towardand from the axis of the rock shaft provides a fixed connection with the shaftmovable into contact with supporting walls by which the bail is held in its adjusted position owing to its disposition at an angle to the under face of the key lever. 'It will therefore be seen that the invention presents a simple, economically constructed and very ethcient form of ribbon shifting mechanism adapted to be carried by a single rock shaft and applicable to machines already constructed; and provides a positive means for varying the extent of vibration of the ribbon arms by shifting the point of leverage thereof.

Having described my invention and set forth its merits, what I claim and desire to I secure by Letters Patent is 1. In a typewriter, a frame, a key lever mounted therein, a rock shaft provided with a lever arm, a ribbon vibrator, means for supporting said vibrator and actuating'the same from said rock shaft,'and a 'bail mounted upon said arm and movable toward and from the axis of said shaft to determine the extent of oscillation thereof.

In a typewriter, a frame, a v mounted therein, a rock' shaft provided with a lever arm, a ribbon vibrator, means for supporting said vibrator and actuating the same from said"rock shaft, and a .bail pivotally mounted upon said'arm and movable toivard and from the axis of said sha ft.'

3. In a typewriter, a, frame, a key lever 1n ounted therein a roclo shaft provided with a lever arm, a ribbon vibrator, means for sup 4. In a typewriter, a frame, a key levermounted therein, a rock shaft provided with a lever arm, a ribbon vibrator, means for sup porting said vibrator and actuating the same from said rock shaft, a bail'pivotally mounted upon said arm and 'movable' toward and key lever and from the axis of said shaft, abutments carried by said arm to engage said bail in its shifted positions, a cushioning device disposed beneath the bail in one of its shifted positions, a feed dog carried by said'arin, and a cooperating GSC211)GiIlCI1t f01' said dog.

6. In a typewriter, a frame, a key lever mounted therein, a rock shaft provided with a lever arm, a ribbon vibrator, means for supporting said vibrator, 'a bail mounted -upon'said arm and movable toward and from the axis of said shaft to determine the extent of oscillation thereof, and means for connecting said vibrator and rock shaft for 1 oscillation by said bail.

7. In aty'pewriter, a frame, a key lever;

mou'nted therein, a rock shaft provided with a lever arm, a ribbon -vilvator, means for supporting said vibrator, a bail .niounted upon said arm and movable toward and from'the axis of said shaft to determine the extent of oscillation thereof, and a" connecting bar mounted for movement into and out of engagement 'with said vibrator and rock' shaft.

8. In a typewriter, a-frame, a key lever mounted therein. a rock shaft provided with a leverarm, a ribbon, vibrator, means for supporting said vibrator, a bail mounted upon said arm'and movable toward and from the axis of said shaft to determine the extent of oscillation thereof,.and a connecting slide bar mounted to engage a lever arm from said vibrator and rock shaft.

9. In a typewriter, a frame, a key lever n ounted therein, a. rock shaft mounted in said frame. a ribbon vibrating lever coin llttftt'tl to said rock shaft, and a bail shiftably mounted upon said rock shaft for movement toward and from the axis thereof.

10.11: a ribbon shifting mechanism, a rock shaft, a supporting frame therefor, a leve arm extended from said shaft and pro- -vided with opposite.abutinents at the free rock shaft, a supporting frame therefor, a lever arm extended from said shaft and provided with opposite abntmeuts atthe free end thereof, a bail having a depending pivoting lug mounted at the free end of said arm, a shifting lever, and a link having a loose connection with said bail and said shifting arm. u

.13. In a ribbon shifting mechanism, a rock shaft, a supporting frame therefor, a lever arm extended from said shaft and mo vided with opposite abutments atthe free emi -thereof, a bail movably mounted to travel between said abutments. pivoting lugs upon theopposite side of said shaft from said arm, a ribbon vibrating lever pivoted in said lugs, a locking member carried by said rock shaft ad acent said vibrator, and means for connecting said membe and vibrator.

14. In a, ribbon shifting mechanism, a i'oeltshaft, a supporting'fraine therefor, a lever arm extended'from said shaft and provided-with oppositeJabutmeut's at the free end thereof, a bail movabiy mounted to travel between said abutments, pivoting lugs upon the oppositeside of said shaft from said arm, a ribbon vibrating lever pivoted in saidlugs, a locking member carried by said rock shaft adjacent said. vibrator, and 'shiftable connections cooperating with said memberto engage and disengage said vibrator.

15. In a ribbon shifting mechanism, a rock shaft, a supporting frame therefor, a lever arm extended from said shaft and provided with opposite abutinent's at the free end thereof, a bail movablymounted to-travel" betweeirsaid abut-ments, pivoting lugs upon shaft adjacent said vibrator, and a slidable" connecting bar cooperatingwith said memher to engage and disengagea lever arm carried by said vibrator.

16. In a ribbon shifting mechanism, a rock 'shaft provided with pivoting lugs a supporting frame for said shaft, means for oscillating said shaft, a ribbon vibrator having a lever arm pivoted in said lugs, a longitudina-lly slotted locking member, and a conneeting bar slidably mounted to, move into the slotted member to engage and disengage the arm of said vibrator.

' 17. In a ribbon shifting mechanism, a rock shaft provided with pivoting lugs, a supporting frame for said shaft, means for oseillatingsai d shaft, a ribbon vibrator having a lever arm pivoted in said lugs, a longitu dinally slotted locking member, a slidinglv mounted courier-ting bar mounted to move.

into the slotted member and provided with a' recess, and a finger carried by said vitn'ator arm and adapted to aline with said recess when the vibrator is disconnected.

18. A ribbon shifting mechanism comprisarms, pivoting lugs carried by said shaft opposite said arms, a ribbon shifting lever mounted in said lugs, a longitudinally slotted locking member extending parallel to said lugs, and a connecting barslidingly mounted to move into said slot to engage the vibrator lever. i

20. A ribbon shifting mechanism comprising a rock shaft having a plurality of lever arms, a bail pivotally mounted upon said arms,'pivoting lugs carried by said shaft opposite said arms, a ribbon shifting lever mounted in said lugs, a longitudinally slotted locking member extending parallel to said lugs, a connecting bar slidingly mounted to move into said slot to engage the vibrator lever, and a guide arm carried by said rock shaft to support said connecting bar.

21. A ribbon shifting mechanism comprisi nga rock shaft provided with means for oscillating'the same, pivoting lugs'carricd by said shaft opposite said oscillating means, a ribbon vibrating level: mounted on said lugs and having a slotted angle arm the upper wall of which is of less length than the lower wall thereof, and a cooperating connecting bar slidingly mounted and provided with a re cess adapted to be alined with the shorter wall of said angle arm.

22. A ribbon shifting mechanism comprising a rock shaftprovided with means for oscillating the same, pivoting lugs carried by said shafttmposite said oscillating means, a ribbon vibrating lever mounted on said lugs and having a slotted angle arm the upper wall of which is of less length than the lower wall thereof,a cooperating connecting bar slidingly mounted and provided with a recess adapted to be alined with the shorter wall of said angle arm, and a longitudinally slotted locking member disposed intermediate said pivoting lugs and adapted to receive said connecting bar.

23. In a ribbon shifting mechanism, a

rock shaft, a ribbon vibrating lever carried thereby, a lever arm pro1ected from said shaft, a bail pivotally mounted upon said rock shaft, a ribbon vibrating lever carried thereby, a lever arm projected from said shaft, a bail pivotally mounted upon said arm to swing toward and from the axis of said shaft, tension means for normally raising said arm and bail, and a key lever provided with a recessed under face disposed in the path of travel of said ball. I

25. In a ribbon shifting mechanism, a suportin frame arock shaft mounted therein P a: 7 a

a. ribbon vibrating lever,carried by said shaft, a lever arm extendedfrom said shaft, a bail pivotally mounted on said arm to swing, toward and'from' the axis of said shaft, and a flat cushioning spring secured to said frame and extended beneath the position of the bail when farthest removed from the axis of the shaft.

26. In a ribbon shifting mechanism, a supporting frame, a rock shaft mounted therein,

a' ribbon vibrating lever carried by said i shaft, a lever arm extended from said shaft,

a bail pivotally mounted on said arm to swing toward and from the axis of said shaft, a flat cdshioning spring seciired to.

said frame and extended beneath the osition of the bail when farthest removed rom the axis of said shaft, and a dependin guide post, carried by the frame and exten ing through said spring.

- 27. In a ribbon shifting mechanism, a supporting frame, arock shaft mounted therein a. ribbon vibrating lever carried by said shaft, a lever arm extended from said shaft, a bail pivotally mounted on Said arm to swing toward and from the axis of said shaft, :1 fiat cushionmg sprlng secured to said frame and extended beneath the osition of the bail when farthest removed cm the axis of said shaft, a key lever mounted above said bail, and a'tension spring for normally holding said bail 'in contact with said lever. I 1

In testimony whereof I affix my signature in presence of two witnesses.

f CHARLES srreo. WVitnesses:

Enwn. GRANT E. Jones, SIronuN.

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