US3648818A - Ribbon fork actuating and locking device - Google Patents

Ribbon fork actuating and locking device Download PDF

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Publication number
US3648818A
US3648818A US864070A US3648818DA US3648818A US 3648818 A US3648818 A US 3648818A US 864070 A US864070 A US 864070A US 3648818D A US3648818D A US 3648818DA US 3648818 A US3648818 A US 3648818A
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US
United States
Prior art keywords
guideway
control
carrier
lever
control shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US864070A
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English (en)
Inventor
Gunter Scheinpflug
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TA Triumph Adler AG
Original Assignee
Triumph Werke Nuernberg AG
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Publication date
Application filed by Triumph Werke Nuernberg AG filed Critical Triumph Werke Nuernberg AG
Application granted granted Critical
Publication of US3648818A publication Critical patent/US3648818A/en
Assigned to TRIUMPH-ADLER AKTIENGESELLSLCHAFT FUR BURO-UND INFORMATIONSTECHNIK reassignment TRIUMPH-ADLER AKTIENGESELLSLCHAFT FUR BURO-UND INFORMATIONSTECHNIK CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE 8/13/80 Assignors: TRIUMPH WERKE NURNBERG AKTIENGESELLSCHAFT
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/04—Ink-ribbon guides
    • B41J35/10—Vibrator mechanisms; Driving gear therefor
    • B41J35/12—Vibrator mechanisms; Driving gear therefor adjustable, e.g. for case shift
    • B41J35/14—Vibrator mechanisms; Driving gear therefor adjustable, e.g. for case shift for multicolour work; for ensuring maximum life of ink ribbon; for rendering ink-ribbon inoperative

Definitions

  • PATENTEBMAR 14 I972 3,648 8 1 8 sum 1 OF 2 INVENTOR -'11 flit/0! Z ZM/ ATTORNEY PAIENTEDMAR 14 1972 SHEET 2 [IF 2 INVENTOR GaM- Z Jzl/ev/ufiaug- ATTORNEY RIBBON FORK ACTUATING AND LOCKING DEVICE BACKGROUND OF THE INVENTION
  • the ribbon fork of a typewriter is operated from the universal bar between operative positions in which red or black portions of an ink ribbon are located in the path of the type lever, and a position in which the ribbon is not engaged by the types, so that a stencil can be made.
  • the ink ribbon In order to produce clear and accurate imprints without smears, the ink ribbon must have arrived before engagement by a type in the respective position, and be completely free of oscillations or vibrations. Particularly, when ink ribbons having different zones for red and blue are used, it is necessary that the ribbon is exactly and at the right time positioned for being engaged by the types, so that imprints combining two different colors are reliably prevented.
  • Another object of the invention is to provide a ribbon fork actuating and locking device which can be placed closely to the universal bar of the typewriter by which the device is controlled.
  • Another object of the invention is to move the ribbon fork to an operative position while the type bar moves over a small part of its path, while during the remaining part of the movement of the type bar, the ribbon fork is locked in the operative position.
  • an embodiment of the invention comprises a control lever fixed to a shaft, and a carrier lever for the ribbon fork tumably mounted on the shaft, the control lever and the carrier lever having different guideways through which a spring-biassed rod passes.
  • a ribbon fork adjusting and locking device comprises a carrier means connected with theribbon fork for movement with the same between an inoperative position and at least one operative position, the carrier means being formed with the first guideway; control means formed with the second guideway having a drive portion transverse to the first guideway and a locking portion parallel with the first guideway; connecting slide means connected with the universal bar of a typewriter and operated by the same between a normal position and an actuated position; and setting means for setting the control means between a locking position in which the connecting slide means in the normal position is located in the parallel locking portion and first guideway, and at least one driving position in which the connecting slide means in the normal position is located in the transverse drive portion and in the first guideway.
  • the carrier means and ribbon fork are locked in the inoperative position and remain locked during movement of the connecting slide means to the actuated position moving in the locking portion and first guideway.
  • the carrier means and the ribbon fork are moved to the operative position during movement of the connecting slide means in the transverse drive portion and in the first guideway toward the actuated position.
  • the connecting slide means enters the locking portion while continuing movement in the first guideway, the carrier means and the ribbon fork are locked in the newly obtained operative position.
  • the carrier means and control means are supported for relative movement about a common axis, and the drive portion of the second guideway is circular and has a center located in the axis, while the locking portion of the second guideway and the first guideway are straight.
  • FIG. 1 is a fragmentary perspective and exploded view illustrating an apparatus according to the invention
  • FIG. 2 is a fragmentary side elevation illustrating the apparatus in an inoperative position
  • FIG. 3 is a fragmentary side elevation illustrating the apparatus in a first operative position in which the upper color zone of the ink ribbon is used.
  • FIG. 4 is a fragmentary side elevation illustrating the apparatus in another operative position in which the lower color zone is used.
  • a control shaft 3 is mounted for angular movement, and carries a fixed setting arm 4 provided at its lower end with arresting recesses 6, 7 and 8 cooperating with a resilient catch in the form of a leaf spring 10 which is secured by a screw 46 to a flange 47 of side wall 1 and has a catch portion 11 which engages one of the arresting recesses 8, 7 and 6, as shown in FIGS. 2, 3 and 4, and finally a stop portion 5.
  • Setting arm 4 is turned in counterclockwise direction beyond the position shown in FIG. 4 under the control'of manual means including a manually operated member 44 connected by a wire link 43 with setting arm 4.
  • the manually operated member 44 has a finger engaging portion 44a indicating the positions of the setting means 4 to 11, and is mounted in the region of the keyboardof the typewriter on a fixed pivot pin 45.
  • setting arm 4 is a thin plate whose stop portion 5 passes through a slot 9 in leaf spring 10 so that catch portion 11 of spring 10 symmetrically engages the respective arresting recess 6, 7 or 8.
  • control shaft 3 is turned between three angular positions in which it is held due to the engagement of one of the arresting recesses 6, 7 and 8 by leaf spring 10, 11.
  • An angular control lever 12 is fixed to control shaft 3, and turns with the same when the angular position of control shaft 3 is set.
  • the lower arm 12a of control lever 12 has a guideway in the form of an angular slot consisting of a drive portion 14 and a locking portion 13. Looking portion 13 is straight, and drive portion 14 extends transverse to locking portion 13 and is part-circular with its center located in the axis of control shaft 3.
  • Carrier lever 18 Adjacent control lever 12, an angular carrier lever 18 is mounted on control shaft 3 for free rotation relative to the same.
  • Carrier lever 18 has an upper arm 21 having a bearing bore 22 in which a pivot pin 23 is mounted for connecting the end of arm 21 with the ribbon fork 24 through which an ink ribbon can be threaded in the usual manner.
  • the lower arm 19 of carrier lever 18 also has a guideway in the form of a straight slot 20 whose length and width correspond to the length and width of the straight locking portion 13 of guideway 14, 13 in control lever 12.
  • a connecting slide in the form of a cylindrical rod 25 has a diameter corresponding to the width of the guideways 13, 14 and 20, and passes through the same.
  • carrier lever 18 cannot move relative to the control means 3, 12 which are locked by the setting means 4 to 11.
  • Slide rod 25 is connected with one end of a spring 17 whose other end is hooked into a hole 16 in a transverse lug on control lever 12.
  • a ring 26 prevents axial sliding of the end of spring 17 on slide rod 25.
  • Spring 17 urges slide rod 25 to move toward control shaft 3 to the ends of slot and of locking slot portion 13 as shown in FIG.
  • slide rod 25 is connected to a link 27 which has a stud 28 located in a slot 29 having a wider assembly portion 30 and being formed in a double armed connecting lever 31 which is mounted on a shaft 32 supported in lateral wall 1, and in another lateral wall, not shown, of the typewriter frame. All drive levers 33 of all type actions are mounted on shaft 32.
  • the upper free end of connecting lever 31 is connected with the universal bar 34 of the typewriter.
  • the drive levers 33 of which only one is shown, are closely spaced mounted on shaft 32 and have projecting portions 35.
  • a coupling pawl 36 biassed by a spring 38, is released by a trigger lever 37 for movement to a position in which the tooth 36a is engaged by a tooth 39a of a continuously rotating snatch roll 39.
  • the spring 38 connects coupling pawl 36 with trigger lever 37 so that a nose 36b of coupling pawl 36 normally abuts the same.
  • drive lever 33 In the position of rest, drive lever 33 abuts a stop bar 40 under the action of a spring 41.
  • Drive lever 33 is connected in the usual manner by a wire 42 to an intermediate lever and a type bar of a type action, not shown.
  • setting arm 4 has been set to a position in which arresting recess 8 is engaged by the arresting spring 10, 11.
  • the ribbon fork 24 is locked, and does not move when a type action is actuated.
  • the straight locking slot portion 13 and the straight slot portion 20 are located in a common plane in which also slide rod 25 is located.
  • the plane is perpendicular to the planes in which the control lever 12 and carrier lever 18 move about the axis of shaft 3.
  • This locking position of the setting means 4 to 11 is obtained by angularly displacing the manually operated member 44 in the region of the keyboard.
  • trigger lever 37 releases coupling pawl 36 whose tooth 36a is engaged by a tooth 39a of the power snatch roll 39 so that drive lever 33 turns about shaft 32 and displaces universal bar 34 by its projecting nose in the direction of the arrow B.
  • Connecting lever 31 is thus turned in counterclockwise direction about shaft 32 and moves link 27 in the direction of the arrow A.
  • Connecting rod 25 moves out of the position shown in FIGS. 1 and 2 and in slot 20 and locking slot portion 13 toward the free ends of lever arms 19 and 12a. Since slide rod 25 is located in the same plane as slot 20 and locking slot portion 13, carrier lever 18 is not displaced so that the ink ribbon fork 24 remains in the same position, and in fact is locked in the inoperative position shown in FIGS. 1 and 2 since control means 3, 12 cannot turn due to the setting means 4 to 11.
  • spring 17 is tensioned so that slide rod 25 and link 27 with stud 28 are moved by spring 17 in a direction opposite to the arrow A during the return movement of the respective actuated type action while stud 28 moves in slot 29.
  • the setting means 4 to 11 can be set to the operative positions shown in FIGS. 3 and 4 in which the ribbon fork 24 places the upper and lower color zones of an ink ribbon, not shown, in an operative position in which the respective zone is engaged by the type, not shown, of an actuated type action.
  • the upper arm 21 of carrier lever 18 has to be raised a distance x for placing the upper zone of the ink ribbon, not shown, in the operative position, and as shown in FIG. 4, the arm 21 has to be raised a distance y from the inoperative position shown in FIGS. 1 and 2 in order to place the lower color zone of the ink ribbon, not shown, in the operative position.
  • setting arm 4 is turned with control shaft 3 until arresting recess 7 is engaged by the catch portion 1 1 of spring 10 so that control means 3, 12 are locked in a certain angular position.
  • drive slot portion 14 turns to a position in which slide rod 25 is located in the middle of the part-circular drive slot portion 14. The movement of drive slot portion 14 relative to slide rod 25 has not caused a displacement of the same since the center of the part-circular drive slot portion 14 coincides with the axis of control shaft 3.
  • universal bar 34 performs a movement which is transmitted by connecting lever 31 to link 27 which moves slide rod 25 in the direction of the arrow A from the middle of the curved drive slot portion 14 toward the beginning of the.
  • manually operated means 44 is shifted to a position in which arresting spring 10, 11 engages arresting recess 6, as shown in FIG. 4. Since slide rod 25 does not move, it is located at the left end of the part-circular drive slot portion 14 at the end of the adjustment of the setting means 4 to l l, but remains at the left end of slot 20.
  • Slide rod 25 is now located at the beginning of the straight locking slot portion 13, and intermediate the ends of the slot 20, and the straight slot 20 is again located in the same plane as the straight slot portion 13 and slide rod 25. Consequently, further movement of slide rod 25 to the right as viewed in the drawing in the straight locking slot portion 13 and in the straight slot 20 cannot cause any angular displacement of the carrier means 18 to 23 with the ribbon fork 24, and the ribbon fork 24 is locked due to the fact that carrier arm 19 is prevented from moving relative to control shaft 3 by slide rod 25 and the fixedly locked arm 12a of control lever 12.
  • the time during which the carrier means 18 to 23 with the ribbon fork 24 are moved during the movement of the type action can be exactly determined so that only a small part of the time during which the type bar performs its printing stroke, is used for the setting of the ribbon fork 24.
  • the present invention provides a ribbon fork actuating and locking device consisting of few and simple parts which transmit force from the universal bar 34 to the ribbon fork 24 along a very short path. Due to this simple and compact construction, no particular changes of the mechanism are required for using the same either in a manual typewriter, or in an electric typewriter.
  • a ribbon fork actuating and locking device comprising a ribbon fork; carrier means connected with said ribbon fork for movement with said ribbon fork between an inoperative posi tion and at least one operative position, said carrier means being formed with a first guideway; control means formed with a second guideway having a drive portion transverse to said first guideway, and a locking portion parallel with said first guideway; connecting slide means connected with said universal bar and operated by said universal bar between a normal position and an actuated position; and setting means for setting said control means between a locking position in which said connecting slide means in said normal position is located in said parallel locking portion and first guideway so that said carrier means and ribbon fork are locked in said inoperative position and remain locked in said inoperative position during movement of said connecting slide means to said actuated position, and at least one driving position in which said connecting slide means in said normal position is located in said transverse drive portion and in said first guideway so that said carrier means and said ribbon fork are moved to said operative position
  • a device as claimed in claim 1 comprising means supporting said carrier means and said control means for relative movementabout a common axis; wherein said drive portion of said second guideway is circular and has a center located in said axis; and wherein said locking portion of said second I guideway and said first guideway are straight.
  • control means include a control shaft supported for angular movement about an axis and a control lever secured to said control shaft and being formed with said second guideway; wherein said drive portion of said second guideway is circular and has a center located in said axis; and wherein said carrier means include a carrier lever mounted on said control shaft for angular movement about said axis and having said first guideway; wherein said first and second guideways are slots, and wherein said locking portion of said second guideway and said first guideway are straight slots.
  • connecting slide means include a straight rod fitting into said slots and being parallel with said axis, a link pivotally connected with said rod, and lever means pivotally connected with said link and with said universal bar.
  • a device as claimed in claim 4 including spring means connecting said rod with said control lever and biassing said connecting slide means toward said normal position.
  • said setting means include a manually operable setting member secured to said control shaft for angular movement and having at least first and second arresting recesses, and resilient catch means cooperating with said arresting recesses in different angular positions of said control shaft for arresting said control shaft with said control lever in said locking and driving positions of said control means.
  • a device as claimed in claim 1 comprising supporting means; wherein said control means includes a control shaft mounted on said supporting means for angular movement, and a control member having said second guideway andbeing secured to said control shaft; wherein said carrier means includes a carrier member having said first guideway and mounted on said control shaft for angular movement about the axis of said control shaft so that said control member and said carrier member move in first and second parallel planes.
  • said carrier member is an angular carrier lever having one arm formed with said first guideway and another arm supporting said ribbon fork;
  • said control member is an angular control lever having one arm formed with said second guideway and being substantially parallel with said one am of said angular carrier lever, and an other arm secured to said control shaft;
  • said first and second guideways are slots; and wherein said connecting slide means include a rod parallel to said axis and located in said slots slidably mounted in said slots, and a spring connecting said rod with said other arm of said angular control lever.
  • said connecting slide means include a straight rod located in a third plane perpendicular to said first and second planes and parallel to said axis of said control shaft, said rod passing through said first and second guideways so that said locking portion of said second guideway and said first guideway are located in said third plane when said control means is in said locking position and said carrier means is in said inoperative position; and wherein said second guideway is displaced relative to said rod in said normal position, and to said carrier means and first guideway when said setting means is set to said driving position; and wherein said locking portion is again located in said third plane when said rod enters said locking portion after passing through said drive portion of said second guideway.

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US864070A 1968-10-17 1969-10-06 Ribbon fork actuating and locking device Expired - Lifetime US3648818A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681802751 DE1802751B2 (de) 1968-10-17 1968-10-17 Antriebsvorrichtung fuer die farbbandgabel einer schreib oder aehnlichen maschine

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US3648818A true US3648818A (en) 1972-03-14

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US864070A Expired - Lifetime US3648818A (en) 1968-10-17 1969-10-06 Ribbon fork actuating and locking device

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US (1) US3648818A (de)
JP (1) JPS498292B1 (de)
AT (1) AT290573B (de)
CH (1) CH481758A (de)
DE (1) DE1802751B2 (de)
FR (1) FR2020878A1 (de)
GB (1) GB1291726A (de)
NL (1) NL142898B (de)
SE (1) SE352843B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862679A (en) * 1973-09-18 1975-01-28 Sears Roebuck & Co Power operated tyepwriter with means for error correction
JPS5088008U (de) * 1973-12-12 1975-07-26
US4411541A (en) * 1981-02-13 1983-10-25 Triumph-Adler A.G. Fur Buro-Und Informationstechnik Ribbon feed and elevating mechanism for typewriters or similar machines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6069700U (ja) * 1983-10-19 1985-05-17 永大産業株式会社 装飾体

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US936044A (en) * 1908-02-15 1909-10-05 Union Typewriter Co Type-writing machine.
US1072899A (en) * 1913-05-09 1913-09-09 Remington Typewriter Co Type-writing machine.
US3233716A (en) * 1962-04-26 1966-02-08 Grundig Max Ribbon positioning arrangement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US936044A (en) * 1908-02-15 1909-10-05 Union Typewriter Co Type-writing machine.
US1072899A (en) * 1913-05-09 1913-09-09 Remington Typewriter Co Type-writing machine.
US3233716A (en) * 1962-04-26 1966-02-08 Grundig Max Ribbon positioning arrangement

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862679A (en) * 1973-09-18 1975-01-28 Sears Roebuck & Co Power operated tyepwriter with means for error correction
JPS5088008U (de) * 1973-12-12 1975-07-26
JPS5414009Y2 (de) * 1973-12-12 1979-06-12
US4411541A (en) * 1981-02-13 1983-10-25 Triumph-Adler A.G. Fur Buro-Und Informationstechnik Ribbon feed and elevating mechanism for typewriters or similar machines

Also Published As

Publication number Publication date
NL142898B (nl) 1974-08-15
GB1291726A (en) 1972-10-04
NL6913197A (de) 1970-04-21
FR2020878A1 (de) 1970-07-17
DE1802751B2 (de) 1971-07-22
JPS498292B1 (de) 1974-02-25
CH481758A (de) 1969-11-30
DE1802751A1 (de) 1970-06-25
AT290573B (de) 1971-06-11
SE352843B (de) 1973-01-15

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AS Assignment

Owner name: TRIUMPH-ADLER AKTIENGESELLSLCHAFT FUR BURO-UND INF

Free format text: CHANGE OF NAME;ASSIGNOR:TRIUMPH WERKE NURNBERG AKTIENGESELLSCHAFT;REEL/FRAME:003935/0913

Effective date: 19800813