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Publication numberUS1800854 A
Publication typeGrant
Publication dateApr 14, 1931
Filing dateApr 6, 1927
Priority dateApr 6, 1927
Publication numberUS 1800854 A, US 1800854A, US-A-1800854, US1800854 A, US1800854A
InventorsBarr John H
Original AssigneeBarr Morse Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Typewriter and the like
US 1800854 A
Abstract  available in
Images(3)
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Claims  available in
Description  (OCR text may contain errors)

April 14, 1931. J. H. BARR TYPEWRITER AND THE LIKE Filed April 6, 1927 3 Sheets-Sheet l BY WM 9 LSATTORNEY,

April 14, 1931. J. H. BARR TYPEWRITER AND THE LIKE 3 Sheets-Sheet 2 Filed April 6, 1927 INVENTOR. rfoznflzarr z a 2 ZISATTORNEY.

April 14, 1931. J. H. BARR 1,800,854

TYPEWRITER AND THE LIKE Filed April 6, 1927 3 Sheets-Sheet 3 z/afi m.

lZlQSATTORNEY.

Patented Apr. 14, 1931 UNITED STATES PATENT OFFICE A JOHN H. BARB, OI I'IHACA, NEW YORK, ASSIGNOR TO BARB-MORSE CORPORATION, A.

CORPORATION OF NEW YORK TYPEWBITER AND THE LIKE Application flled April 6, 1927. Serial No. 181,542.

This invention relates to typewriters and the like, and more particularly to mechanism for shifting the ink-bearing ribbon into and out oi printing position at each operation of the printing or key mechanism. Heretotore, some diiiiculty has been experienced with ribbon shifting mechanisms owing to the fact that when printing mechanisms or keys are operated very rapidly, there is frequently an imperfect placing of the ribbon which is particularly objectionable when ribbons having two strips or hands of different color are used. In the latter case, the imperfect placing of the ribbon frequently causes a slight change in color along the margin of the line being printed.

An object of this invention is to provide an improved mechanism for moving the ribbon into and out of printing position, with which the ribbon will always be properly positioned for printing regardless of the rate at which the type keys or printing devices are operated; and with which there will be no mixing of the colors of the two color ribbon by improper placing of the ribbon.

A further object of the invention is to generally improve and simplify mechanism for moving the ribbon into and out of printing position, with which the ribbon will always be substantially at rest when a printing operation occurs; with which the extent of movement of the ribbon vibrator may be easily and selectively varied for printing in diiferent colors or through different bands of the ribbon; with which the resistance to operation of the keys will not be unduly increased; and which will be relatively simple, compact, durable and inexpensive.

Various other objects and advantages will be apparent from the following description of an embodiment of the invention, and the novel features will be particularly pointed out hereinafter in connection with the appended claims.

In the accompanying drawings:

Fig. 1 is a sectional elevation of a portion of a typewriter, and illustrating one embodiment of the invention;

Fig. 2 is an elevation of a part of the mechanism for moving the vibrator;

Fig. 3 is a sectional elevation similar to Fig. l, but with the ribbon moving mechanlsm set to print in a different color;

Fig. 4 is an elevation of another part of the mechanism for moving the ribbon into and out of printing position;

Fig. 5 is another elevation of the mechanism shown in Figs. 1 and 3;

Fig. 6 is an elevation similar to Fig. 2, but viewed from the opposite direction from that of Fig. 2; and

Fig. 7 is a perspective of one of the supportlng parts of some of the mechanism.

In the illustrated embodiment of the invention, the typewriter or the like may have a case segment 1 in which the type bars, not shown, are mounted in the usual manner for movement into and out of printing position at a point above the upper edge of the segment. The segment 1 may be mounted for case shifting movements, if desired, in any suitable manner. A ribbon guide or vibrator 3 may be mounted upon the rear or under face of the segment 1 in any suitable manner, for movement in a plane parallel to the plane of the segment into and out of a position n which it presents the ribbon in proper position for printing upon the usual platen, not shown. The mounting of the vibrator 3 upon the segment is such as to permit of the case shifting movements of the segment without movement of the vibrator. The segment may have the usual type guide 4 for guiding the type bars accurately into printing position in a manner well known in the art.

The vibrator 3 may have 3. depending tongue 5 terminating in an angularly extending portion 6 carrying a pin 7. A suitable supporting member or bracket 8, shown in perspective in Fig. 7, is mounted upona suitable part (not shown) of the frame of the typewriter at a suitable point at the rear of the case segment, and serves as a support for some of the mechanism utilized in imparting movements to the vibrator 3. A lever 9 is pivotally connected by pin 10 to the bracket or support 8, and terminates at its free end in a slot 11 which embraces the pin 7, so that as the lever 9 is oscillated about its plvot pm 10, it will reciprocate the vibrator 3. An arm 12 is pivotally connected by pin 13 to the lever 9, and also is pivotally connected by a pin 14 to one end of a second arm 15. The free end of the second arm 15 is in turn connected by a pin 16 to the free end of another arm or support 17 The arm 17 terminates at its other end in a cylindrical boss 18 (Figs. 2 and 5) which is pivoted upon a short stud 19, (Figs. 2 and 7), on the bracket or support 8.

From the foregoing it will be observed that if the arm 17 is held stationary, a straightening of the toggle joint formed by the two arms 12 and 15 will cause a movement of the lever 9 in a direction to shift the ribbon vibrator or guide 3 from the full to the dotted line position in both Figs. 1 and 3. If the arm 17 is in the angular position shown in Fig. 3, it will be noted that the arms 12 and 15 make a lesser angle with one another, that is a more acute angle, than when arm 17 is in its other position shown in Fig. 1. Consequently, a straightening of the toggle joint formed by arms 12 an 15 from the relative position shown in F ig).03 will cause a greater movement of the rib n guide or vibrator 3 than will be the case when the arm 17 is in its lower position, as shown in Fig. 1. The arm 15 extends alon one face of the bracket 8, and the arm 1 along the opposite face thereof, and the pin 16 carries thereon between the arms 15 and 17 a spacer washer20 which lies within the plane of the bracket and therefore by enagement with different sections 0 the racket limits the movement of the arm 17 in both directions, one limit of movement being shown in Figs. 2 and 3, and the other limit of movement being shown in Fig. 1.

A rod 21 (Fig. 5) is pivotally mounted at one end in a frame plate 22, and at its other end is received within and fitted to a socket of the boss 18 provided on the arm 17. The socket of the boss 18 is provided with lateral extensions or slots 23 in which wings of the rod are received to couple the rod and boss for rotation together. The rod 21 carries an operating arm 24 (Figs. Sand 5) which at its free end is pivotally connected by pin 25 to one end of a link 26, the other end of the link being pivotally connected by pin 27 to one end of a lever 28, which is pivotally mounted by pin 29 on any suitable part of the frame, such as adjacent the keyboard.

The free end of the lever 28 extends into a position conveniently accessible for manipulation, so that an operator may conveniently and easily reach and grasp the lever 28 and operate it to vary the position of the support or arm 17 and thus vary the throw which is given the vibrator 3 at. each operation of a key. When the ribbon is of the two color ty having longitudinal bands or sections 0 different color, the change in throw of the ribbon will carry either one of its movement in Fig. 1.

An actuating member in the form of. a lever.

30 may be pivoted at 31 to a part of the frame or support 8, and at its free end is pivotally connected by a pin 32 to one end of a link 33, the other end of the link being pivotally secured to the pivot pin 14 at the joint or connection between the two arms 12 and 15 of the toggle. An operating rod 34 has a bent or angular end 35 which extends through an aperture in the lever 30 intermediate of its ends, the angular end after passing through the lever 30 being bent or extended angularly a second time to prevent disengagement of the rod 34 from the lever 30. The other end of the rod 34 may be threaded to receive a nut 36 which is carried by one end of a strap 37. The other end of the strap is bent around a pin 38 carried by angular portion 39 of a universal bar 405)- The bar 40 is pivotally mounted upon a bearing pin 41, in a position to be engaged by an end of each of a number of type keyoperated driver members 42, each driver member having a slotted end 43 which slides upon a support 44 of the frame. Thus when any driver member 42 is reciprocated by the actuation of its particular type key, its slotted end will engage with the universal bar 40'and.

same angular extent at each operation.

A suitable spring device (not shown) may. be connected to a suitable part of the mechanism to return the universalbar 40 to its normal position (shown in full lines in Fig. 4) when it is released by the driver members, and when this bar 40 is returned to normal position, the actuator lever 30 will also be returned to its normal position shown in full lines in the drawing. The lever 30 in returning to normal position will break the toggle by moving the arms of the toggle into acute angular positions Wlth respect to one another, as shown in full lines on the drawing. When the lever 30 is actuated from any driver member 42, it will move the toggle into a substantially straightened condition, as shown in dotted lines in the drawing, thus causin a movementof thevibrator 3 upwardly, an move the ribbon into rintin position. The return of the togg e into broken condition, as shown in full lines in the drawing, causes a retraction of the vibrator and ribbon from printing position in order that the printed line may be visible at all times when the type key is not de aressed.

The actuator prefera ly should extend parallel or nearly parallel to the link 33 when 1 the toggle is in the broken or starting position and the actuator 30 and link 33 together form a to gle system or second toggle. Being fairly c ose to a straightened position, the linkage 30, 33 or toggle system will at first move the to gle 12, 15 relatively slowly and smooth y; but as the link 33 swings away fromdead center, it will move the toggle 12, 15 with a rapidly increasing velocity until the tog le 12, 15 is about half straightened out. A er that, though the pivot '14 may con-. tinue to move rapidly, the actual movement of the vibrator slot llwill begin to slow down and approach zero as the toggle 12, 15 straightens out, so that the vibrator will be gradually brought to a definite, smooth stop without overtravel regardless of slight variations inthe travel of the actuator 30. With high speed typewriting a properly controlled acceleration and deceleration of the vibrator becomes important as a factor in reducing the shock or impact on the finger tips of the operator.

lit will be, further noted that in the illustrated embodiment of the invention the stud 19 which pivotally supports the arm 17, lies in close proximity to a theoretical line joining the pivot pin 14 at the joint of the toggle with the pivot 31 of the actuator lever when the toggle 'is in straightened condition. In the operation of the device, the minimum throw for the vibrator will usually be utilized for the black or other color most commonly in use, since less load is placed upon the keys in effecting the shorter ribbon movements. Thus the normal position of the parts for the color most commonly in use will be as shown in Fig. 1. At that time the support 17 is shifted downwardly as far as possible, so as to provide the maximum angle between the arms of the toggle. \Vhen any key is operated, the universal bar 40 will be operated, and the toggle will be straightened, thus shifting the parts from the full to the dotted line position in Fig. 1. YVhen the type key is released, the parts will return to the full line position.-

If one desires to change the color in which the ribbon will print or to use another band of the ribbon for printing purposes, it is merely necessary to shift the lever 28 from the position shown in Fig. 1 to the position shown in Fig. 3. This movement of the lever 28 causes a rocking of the support or arm 17 from the position shown in Fig. 1 to the position shown in Figs. 2, 3 and -6. During this movement, the angle between the arms of the toggle will be decreased, and this decrease will occur by movement of the 'arm 15 about the pin 14 at the joint between the arms of the toggle, with very little resulting movement oft e other arm 12 of the toggle. The ribbon will remain in the retracted position until a type key is actuated, and then by actuation of the type ke the toggle-will be straightened as explaine before During such straightening, the throw or extent of movement now given the ribbon and vibrator will be greater than before, because the pivots of the outer ends of the arms of the toggle were brought nearer together by the shifting of the lever 28. Since the pivot pin 16 of the arm. 15 remains relatively fixed while the toggle is be.- ing straightened, all of the movement due to the straightening of the toggle will therefore be given to the pivot pin 13 of the toggle, and through it transmitted to the vibrator and ribbon.

It will be obvious that various changes in the details, which have been herein described and illustrated in order to explain the nature of the invention, may be made by those skilled in the art within the principle and scope of the invention as expressed in the appended claims. p

I claimras my invention 1. In a typewriter or the like, a ribbon vibrator mounted for movement to carry its ribbon into and out of printin position, an actuating member for said vi rator, and a mechanical driving connection comprising a plurality of toggle systems between said member and vibrator one system connected to and operating the other, each system being operable between a broken position and an approximately straight line position and moving out of straight line position as the other moves towards its strai ht line position for causing a rapid rate 0 travel of the vibrator during the middle portion of its motion, said rate being gradually reduced toward either end of the vibrators motion, whereby the vibrator may be started without shock and whereby variations in its final position dueto variations in the travel of the actuating member will be minimized.

2. In a typewriter or the like, a ribbon vibrator mounted for movement to carry its ribbon into and out of printing position, an actuating member for said vibrator, and a mechanical drivingconnection comprising a plurality of toggle systems between said member and vibrator, one system connected to and operating the other, each system being operable between a broken position and an approximately straight line position and moving out of straight line position as the other moves towards its straight line position whereby said connection will transmit the motion of the actuating member to the vibrator with variable velocity, said velocity startinggradually from zero, mcreasing continually to a maxlmum in the middle portion of the stroke and continually decelerating to zero toward the end of the stroke, whereby the vibrator will start without shock and stop definitely irrespective of slight variations in the length of stroke of-the actuating member. I

. 3. In a typewriter or the like, a ribbon vibrator mounted for movement to carry its ribbon into and outof printing position, an actuating member, and driving mechanism comprising toggle links forming two toggle couples connected to actuate one another, and interposed between said member and vibrator, the couple connected to said vibrator moving into approximately straightened position when the vibrator is shifted to place the ribbon in printing position, and the other couple being then in its broken position and approaching straightened posit/ion as thei the vibrator will be brought to a stop gently.

4. In a typewriter or the like, a ribbon vibrator mounted for movement to carry its ribbon into and out of printing position, means including a to gle couple for causing movement of said viirator into and out of printing position when the toggle couple -is straightened and broken respectively and a second (toggle couple, connected to the first toggle couple for straightening and breaking it and thus causing movements of the vibrator into and out of printing position each of said couples being broken when the other couple is in straightened: position.

5. In a typewriter or the like, a ribbon vibrator mounted for movement to carry its ribbon into and out of printin position, means including a toggle couple or causing movement of said vibrator into and out of printing position when the toggle couple is straightened and broken respectively, means connected to the toggle element for straightening and breaking it and thus causing movements of the vibrator into and out of printing position, said last named means including another toggle couple connected to the first toggle couple at its joint, and key actuated means connected to said another to gle couple for causing movements thereo to straighten or break the first toggle couple by breaking and straightening movements respectively of the second toggle couple.

6. In a typewriter or the like, a llbbOIl vibrator inounted for movement to itsribbon into and out of rintin 'tl means including a toggle c uple said vibrator, with t e toggle couple nor.- mally in a broken position, and operable to move the vibrator into printing position when the tog le couple isstraighte'ned, and a key actuate approximately dea center position connected to the first toggle couple for moving the latter into andout of straightened position.

7. In a typewriter or the like, a ribbon vibrator mounted for movement to carry its,

ribbon into and out of printing position, means including-a toggle couple connected to said vibrator, withthe' toggle couple nor,- mally in a broken position, and operable to move, the vibrator into printing position when the toggle couple is straightened, a key actuated second toggle couple connected to said .first toggle couple for moving the latter into and opt of straightened position, and selectively operable means for varying the angle between the members of the first toggle couple when said couple is in broken position and without shifting said vibrator,

whereby the extentof each movement of the second toggle couple, normally in vibrator-caused by straightening ofthe first toggle couple may be selectively varied. 1 8. In a typewriter orthe like, a ribbon vibrator mounted for movement to carry its ribbon into andout'of printing position, a toggle couple-including two pivotally connected arms, means for connecting one of said arms to said vibrator, means for securing the free end of the other arm of said couple against undesired movement, and a second toggle couple normally ap roximately folded and connected to said rst toggle couple for shifting it into straightened position as said second couple unfolds, whereby the ."straightening and breaking of the first toggle couple, will move the vibrator into and out of printing position.

9. Ina typewriter or the like, a ribbon vibrator mounted for movement to carry its ribbon into and out of printing position, a

normally broken toggle couple including two pivotally connected arms, means ,for connecting one of said arms to said vibrator, means for securing the free end of the other arm of said couple against undesired movement, and a second toggle couple, connected to said first toggle couple for shifting it into and out of straightened position, wherebythe straightening and breaking of the first toggle'couple will move the vibrator into and out of printing position, said securing means being adjustable to vary the angle between the arms of the first toggle couple when that toggle couple is broken, whereby the. extent of III movement of the vibrator due to the straightfree end of one of said arms to said vibrator;i

means for pivotally supporting the free en of the other arm of sand toggle, a pivoted actuating member, a link pivotally connected to said member and to said toggle, said link and member forming a tog e system approaching an approximate ead center osition while said toggle is broken, and ey actuated means connected to said actuating member for imparting angular movement thereto in a manner to straighten or break the toggle and thus cause a movement of the vibrator to carry its ribbon into and out of printing position.

11. In a, typewriter or the hke, a rlbbon vibrator mounted for movement to carry its ribbon into and out of printing position, a toggle including a pair of arms pivotally connected together, means for connecting the free end of one of said arms to said vibrator, means for pivotally supporting the free end of the other arm of sa1d-toggle, a pivoted actuating member, a link pivotally connected to said member and to said to gle, said link and member forming a to g e system approaching an approximate ead center position while said toggle is broken, and key actuated means connected to said actuating member for imparting angular movement thereto in a manner to straighten or break the toggle and thus cause a movement of the vibrator to carry its ribbon into and out of printing position, said means for pivotally mounting an arm of the toggle being selectively shiftable in a manner to vary thenormal angle between the arms of the toggle when said actuating member is at one limit of its movement, whereby the extent of movement of the vibrator caused by straightening of the toggle element may be varied by a movement of said means for pivotally mounting an arm of the toggle element.

12. In atypewriter or the like, a rlbbon vibrator mounted for movement to carry 1ts ribbon into and out of printing pomtion, a support, an arm pivotally connected to sa1d support and in turn connected to sa1d vibrator, a toggle including a pan of arms 1votally connected with one another, the rec end of one of the arms of said toggle being connected to said arm, a second arm pivotallv mounted on said support and pivotally connected at its free end to the free end of the other arm of said toggle,,operating means connected to said second arm for moving it angularly in a manner to vary the angle between the arms of said toggle when sa1d vibrator is at one limit of its movement, and a second toggle connected to the first toggle for straightening or breaking the same, and thereby causing a movement of sa1d vibrator, one of said toggles breaking while the other is moving towards dead center position,

the movement of said second arm throu h its variation of the initial angle between t e arms of the element varying the extent of movement given said vibrator upon the straightening of the first toggle.

13. In a typewriter or the like, a ribbon vibrator mounted for movement to carry its ribbon into and out of rinting position, a

.support, an arm pivotal y connected to said support and in turn connected to said vibrator, a toggle including a pair of arms pivotally connected with one another, the free end of one of the arms of said toggle being connected to said arm, a second arm ivotally mounted on said support and pivotally connected at its free end to the free end of the other arm of said tog le, operating means connected to said secon arm for moving it angularly in a manner to vary the angle between the arms of said toggle when said vibrator is at one limit of its movement, and means connected to said toggle for straightening or breaking the same, and thereby causing a movement of said vibrator, the movement of said second "arm through its variation of the initial angle between the arms of the toggle varying the extent of movement given said vibrator upon the straightening of said toggle, said means connected to the toggle for operating the same including an arm also ivotally mounted on said support and a link connecting the free end of said arm to said toggle to form a toggle system, and key operated means connected to said last mentioned pivoted arm.

14.- In a typewriter or the like, a ribbon vibrator mounted for movement to carry its ribbon into and out of rinting position, a toggle including a air of arms pivotally connected to one anot er, means connecting the free end of one of said arms to said vibrator, a support pivotally connected to the free end of t e other of sa1d arms and in turn pivotally mounted, an actuating member, a link ivotally connected to said actuating memr and to said to gle at the connection between the arms o said toggle, means connected to said actuating member for oscillating the same, and thereby causing a straightening or breaking of said toggle and thus movements of said vibrator, the movement of said pivotal support varying the initial angle between the arms of said toggle when the latter is broken, whereby the extent of movement given the vibrator by the strai htening of the toggle will vary with the angu ar position of said pivotal support, the connection between the arms of said toggle being in close proximity to a line connecting the pivotal axes of said actuating member and said pivotal support when the toggle is in straightened position in all angular positions of said pivotal support.

15. In a typewriter or the like, a ribbon vibrator, key actuated means for moving-said vibrator, means for controllin theextent of' ivotally mounting said arm,-said arm having a socket in proximity to the axis about which it moves, a rod pivotally mounted at one end in said frame and fitted at its other end in said socket, an arm secured to said rod, means including alink connected to said last mentioned arm for causing movements thereof in a manner to control the extent of movement of the vibrator at each operation of said key actuated means.

16. In a typewriter or the like, a ribbon vibrator mounted for movement to-carry its ribbon into and out of printing position, a toggle including two pivotally connected arms, means for connecting one of said arms to said vibrator, means for securing the free end of the other arm of said toggle against undesired movement, wherebystrai htening and breaking of the toggle will shi the vibrator into and out of printing position, a pivoted actuator arm extending to and beyond the joint between the toggle arms when the toggle is broken, a link pivotally connected to said joint and to said actuator arm at a point beyond said joint, and extending generally in the direction of said one of the arms when the toggle is broken, and means for moving said securing means to vary the angle between said toggle arms when the toggle is broken, with a minimum movement of said one of the arms, whereby the extent of movement given the ribbon vibrator at each straightening and breaking of the toggle will be varied with variations in the position of said securing means.

17. In a typewriter or the like, the ribbon vibrator mounted for movement to carry its ribbon into and out of printin position, an actuating member, and a varia le speed connecting mechanism between them, said connecting mechanism comprising members hav ing a plurality of successively assumed dead center positions and being arranged to travel from proximity of one dead center position to the other dead center position during the stroke of the actuating member whereby the vibrator may be accelerated and decelerated without shock.

18. In a typewriter or the like, a ribbon vibrator mounted for movement to carry its .ribbon into and out of 'printin position, an actuating member, and a varia le speed con necting mechanism between them, said connecting mechanism comprising members having a plurality of successively assumed dead center positions and being arranged to travel from proximity of one dead center position to the other dead center position during the stroke of the actuating member whereby the vibrator may be accelerated and decelerated without shock, and selectively operable means for adjusting said connectmg mechanism to vary the extent of the movement of the vibrator at each operation of said member.

19. In a tQeWriter or the like, a ribbon vibrator m'ova' le to carry its ribbon into and out of printing position, a folded tog le connected to said vi rator for actuating t e same nto and out of printing position as the toggle is moved toward and from straightened position respectivel a second toggle connected to the-first toggle or actuating the latter toward and from straightened osition, said second toggle beingnormally olded and unfolding as 1t operates the first toggle towards straightened position, whereby said vibrator may be operated with a smooth start and a smooth definite finish without overtravel, and means for operating said second toggle.

20. In a typewriter or the like, a ribbon'vibrator movable to carry its ribbon into and out of printingposition, a folded tog le con nected to said v rator for actuating t e same nto and out of printing position as the toggle is moved toward and from strai htened position respectively, a normally to ded second toggle connected at one end to the first toggle for actuating the latter toward and from stra ghtened position, said second toggle unfold ngas it moves the first toggle towards strai htened position, whereby said vibrator may be operated with a smooth start, and a smooth definite finish without overtravel, and means for operating said second toggle element.

In testimony to the foregoing I hereto sign my name.

J OHN- H. BARR.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2616547 *Jun 21, 1947Nov 4, 1952IbmReversible ribbon feeding mechanism for typewriting machines
US3595361 *Mar 18, 1968Jul 27, 1971Siemens AgRibbon fork actuating mechanism for typewriters and the like
US3598220 *Mar 19, 1969Aug 10, 1971Litton Business Systems IncRibbon-lifting mechanism for a typewriter
US5504970 *Jun 24, 1994Apr 9, 1996The Scott Fetzer CompanyHand-held vacuum cleaner
Classifications
U.S. Classification400/216.1
International ClassificationB41J35/00
Cooperative ClassificationB41J35/00
European ClassificationB41J35/00