US3623587A - Type action drive - Google Patents

Type action drive Download PDF

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Publication number
US3623587A
US3623587A US817376A US3623587DA US3623587A US 3623587 A US3623587 A US 3623587A US 817376 A US817376 A US 817376A US 3623587D A US3623587D A US 3623587DA US 3623587 A US3623587 A US 3623587A
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US
United States
Prior art keywords
guide
coupling member
type action
drive
power roll
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
US817376A
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English (en)
Inventor
Manfred Link
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 GmbH
Original Assignee
Triumph Werke Nuernberg AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Triumph Werke Nuernberg AG filed Critical Triumph Werke Nuernberg AG
Application granted granted Critical
Publication of US3623587A publication Critical patent/US3623587A/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
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B41J23/00—Power drives for actions or mechanisms
    • B41J23/02—Mechanical power drives
    • B41J23/04—Mechanical power drives with driven mechanism arranged to be clutched to continuously- operating power source
    • B41J23/06—Mechanical power drives with driven mechanism arranged to be clutched to continuously- operating power source by snatch rolls
    • 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
    • B41J7/00—Type-selecting or type-actuating mechanisms
    • B41J7/92—Impact adjustment; Means to give uniformity of impression
    • B41J7/94—Character-by-character adjustment

Definitions

  • Each type action of a typewriter has a drive member connected with the type bar and a coupling member pivotally mounted on the drive member and cooperating in a coupled position with a power roll.
  • the coupling member has a camming surface cooperating with an adjustable guide means mounted on the supporting frame of the typewriter, and camming the coupling member out of engagement with the power roll.
  • German Pat. Nos. 521,880 and 1,203,802 disclose type actions incorporating stops serving this purpose.
  • very great friction is produced between the coupling projection of the coupling member, and the tooth of the snatch roll engaging the same due to the relative movement between the two parts. For a moment, the coupling member and the snatch roll are forcefully pressed against each other before they separate.
  • the US. Pat. No. Re., 25,01 1 discloses a type action without a stop for separating the coupling member from the snatch roll, and a separation is efiected by moving the drive member with the coupling member along a path which deviates from the periphery of the snatch roll. An adjustment of the impact force of the individual type actions is accomplished by bending the coupling member. In this construction, it is also possible that a tooth of the snatch roll exerts momentarily great pressure on the coupling member before the same is cammed by the tooth of the snatch roll out of engagement with the same.
  • Another object of the invention is to provide a plurality of type action drives which can be individually and collectively adjusted in accordance with the desired impact force.
  • Another object of the invention is to move the coupling member by resilient means into coupling engagement with the power roll, but to positively move the coupling member out of engagement with the power roll by camming engagement between a part of the coupling member with a guide.
  • Another object of the invention is to gradually move the coupling member out of engagement with the power roll.
  • the present invention is concerned with an improved type action drive for a typewriter having a power roll and supporting means.
  • One embodiment of the invention comprises a drive member mounted for turning movement about a first axis; a coupling member mounted on the drive member for turning movement about a second axis between an inoperative position and an operative position coupled with the power roll and driven by the same together with the drive member; manually operated means for moving the coupling member from the inoperative position to the operative position so that the drive member is driven and operates the type action; and a guide means mounted on the supporting means of a typewriter and having a guide surface engaged by another guide surface on the coupling member during movement of the coupling member with the power roll.
  • one of the guide surfaces is a curved camming surface having a center of curvature substantially coinciding with the first axis so that the coupling member is gradually moved to the inoperative position during rotation of the power roll and is gradually withdrawn from the same.
  • the camming surface is provided on an arm of the coupling member and has a center of curvature substantially coinciding with the axis of the drive member.
  • the arm with the camming surface is located farther spaced from the second axis of the coupling member than the coupling projection which cooperates with the power roll.
  • the precise moment of engagement of the camming surface of the coupling member, and thereby the impact force of the type bar of the respective type action can be determined.
  • the camming surface has a center of curvature located in the turning axis of the drive member, the separation of the coupling projection of the coupling member from the tooth of the snatch roll is gradual and no substantial friction or pressure can develop.
  • FIG. 1 is a fragmentary elevation illustrating a type action drive according to the invention in a position of rest;
  • FIG. 2 is a fragmentary side elevation illustrating the type action drive in a coupled position obtained by depression of a key
  • FIG. 3 is a fragmentary elevation illustrating the type action drive in the moment of the separation of the coupling member from a snatch roll;
  • FIG. 4 is a fragmentary elevation illustrating the type action drive at the beginning of the return movements of the parts to the position of rest while the key is held in the depressed position;
  • FIG. 5 is a fragmentary elevation illustrating the detail of the type action drive in coupled condition, similar to FIG. 3.
  • the supporting frame means of the typewriter which is provided with type action drives according to the invention, include a support 1 having slots in which an upper link 2 and a lower link 3 are mounted on pivot shafts.
  • the other ends of links 2 and 3 are pivotally connected to a stem portion of a key lever 4 which has an abutment portion 5 abutting a stop bar 6, common to a row of key levers 4, under the action of spring 7 which connects a hook portion of link 3 with a partly shown bar 8, which is either fixed on support 1, or adjustably mounted on the same for varying the pressure required for operation of the keys.
  • the action of spring 7 urges key lever 4 to its normal position of rest abutting stop bar 6. As shown in FIG. 2, depression of key lever 4 moves abutment portion 5 away from stop bar 6.
  • the lower link 3 has a downwardly projecting arm carrying a pivot on which a trigger 9 is pivotally mounted.
  • a spring 10 connects trigger 9 with a point of link 3 so that trigger 9 is biassed to turn in clockwise direction, as viewed in the drawing, to a position in which a transversely projecting, bentover lug or projection 11 abuts the lower arm of link 3.
  • Trigger 9 cooperates with the end of an arm of a control lever 13 which is mounted for turning movement on a pivot pin 15 carried by a drive member 14.
  • Drive member 14 is mounted on support 1 for angular movement about a pivot 16.
  • a spring 17 is secured to arm 23 of drive member 14 and biases the same in clockwise direction to a position in which an arm of drive member 14 abuts a stop bar 25 common to all type actions.
  • a wire link 24 connects arm 23 with a linkage connected with the type bar, not shown, and in the position of rest of drive member 14 shown in FIG. I, the type bar is in a position of rest.
  • Drive member 14 carries a pivot pin 19 on which a coupling member 20 is mounted for angular movement.
  • a spring 21 connects coupling member 20 with control lever 13 and biases coupling member 20 to turn in clockwise direction until abutting a projection on control lever 13 which holds coupling member 20 in the inoperative position in which a coupling projection 20a thereon is spaced from the teeth of snatch roll 35 which rotates continuously in the direction of the arrow a.
  • Coupling member has a curved arm 22 whose rear face abuts arm 23 of drive member 14 in the position of rest shown in FIG. 1, whereby also the angular position of control lever 15 is determined so that the transverse projection 13a thereof is spaced from the recessed end portion of trigger 9.
  • a guide means 31 is mounted on a pivot pin 32 located in a slot of support 1 and has an arm 33 provided with a wear and noise resistant envelope 34 which is located in the proximity of arm 22 of coupling member 20.
  • the other arm of guide means 31 is forked and has a slot into which a projecting portion of an adjusting screw 27 projects.
  • Adjusting screw 27 is threaded into a bore in a supporting bracket 18 which is fixed on the supporting means of the typewriter.
  • An elastic layer 28 frictionally engages the head of screw 27 so that the same is secured against undesired turning which would change the position of portion 29, and thereby the position of the angular guide lever means 31.
  • the bar 26 is common to all type actions of a row, and by adjusting the position of the bracket 18, the positions of all angular guide lever means 31 of the row of type actions can be simultaneously adjusted, whereas by adjustment of individual screws 27, the guide lever means 31 of the respective type action is adjusted to vary the position of arm 33 with cover 34 relative to the front surface of the curved arm 34.
  • screws 27 are adjusted to permanently hold arm 22 in a predetermined position in relation to the front surface of arm 33,
  • the concave front surface of arm 22 cooperates with the surface of the cover 34, and is a camming surface having its center of curvature substantially in the axis of pivot 16 of drive member 14.
  • lever arms 37 On the pivot shaft 36, which supports the lower links 3 of the row of type actions, two lever arms 37 are mounted for angular movement which are connected by an abutment bar means 39 having an elastic cushion bar, which is engaged by links 3 in the position of FIG. 2 upon actuation of the key lever 4.
  • Levers 37 have abutment portions 38 and are: biased by spring 40 to abut stop bar 6 on which also the abutment portions 5 of the key levers 4 abut in the position of rest.
  • trigger 9 is raised in the direction of arrow b and pushes against the transverse bentover lug 13a of control lever 13 so that the same turns in the direction of the arrow c, see FIG. 1, and transmits a turning motion through spring 21 to coupling member 20 so that the coupling projection 20a engages a tooth of snatch roll 35 while projection 13b of control lever 13 separates from projection 20b of coupling member 20.
  • FIG. 1 shows that the coupling projection 20a engages a tooth of snatch roll 35 while projection 13b of control lever 13 separates from projection 20b of coupling member 20.
  • coupling member 20 is now in an operative position in which coupling projection 20a is located at the bottom of a notch between teeth of snatch roll 35, so that during rotation of the snatch roll 35 in the direction of the arrow a coupling member 20 is rapidly accelerated while coupling projection 20:: moves along a circular path corresponding to the periphery of the snatch roll about the axis of the latter.
  • key lever 4 can be released earlier, any time after coupling member 20 has assumed the operative position as shown in FIG. 2. It It is well known that type actions controlling small types, such as types representing a period or comma, should be associated with a lesser impact of the type bar than types representing large characters such as M or W.
  • the respective adjusting screw 27 is turned so that portion 29 angularly displaces guide means 31 whereby the guide surface on arm 33,34 is displaced relative to the camming guide surface of arm 22 ofcoupling member 20, In this manner, the moment at which the camming surface engages the noise reducing cover 34 of arm 33 is varied, so that after adjustment of screws 27 of several type actions, the retraction of the respective coupling member 20 from the operative position coupled with snatch roll 35, takes place earlier or later, as required for producing different impact forces of type bars with types of different size.
  • the impact forces produced by all type actions of the row are simultaneously varied to the same degree, as is advantageous for adapting the typewriter to typing of a smaller or greater number of carbon copies, while the relative impact forces of the several type actions remain adjusted, as before, when bar 26 is adjusted.
  • each type action drive comprising a drive member mounted on said supporting means for turning movement about a first axis; a coupling member mounted on said drive member for turning movement about a second axis between an inoperative position out of contact with said power roll, and an operative position coupled with said power roll and moving along a first path about said second axis while moving with said drive member along a second path about said first axis for operating the respective type action, said coupling member having a first guide surface; manually operated means for moving said coupling member from said inoperative position to said operative position; a guide means movably mounted on said supporting means and having a second guide surface engaged only by said first guide surface of the same type action during movement of said coupling member with said power roll, one of said first and second guide surfaces being a curved camming surface having a center of curvature coinciding with said first axis when the movement of said coupling member along said first
  • Type action drive as claimed in claim 1 wherein said first guide surface is said camming surface and has a center of curvature coinciding with said first axis of said drive member.
  • Type action drive as claimed in claim 1 wherein said coupling member has a coupling projection and a guide arm transverse to said coupling projection and having said first guide surface; wherein said first guide surface is curved and is said camming surface; wherein said first guide surface is located farther spaced from said second axis than said coupling projection and has said center of curvature coinciding with said first axis; and wherein said guide means has a portion having said second guide surface and being in sliding engagement with said camming surface.
  • a type action drive comprising a drive member mounted on said supporting means for turning movement about a first axis; a coupling member mounted on said drive member for turning movement about a second axis between an inoperative position out of contact with said power roll, and an operative position coupled with said power roll and driven by said power roll together with said drive member, said coupling member having an arm with a first guide surface; manually operated means for moving said coupling member from said inoperative position to said operative position so that said drive member is driven and operates the type action; and a guide means including a guide lever mounted on said supporting means for turning movement and having a second guide surface engaged by said first guide surface during movement of said coupling member with said power roll and an arm formed with a slot; said first guide surface being a curved camming surface having a center ofcurvature substantially coinciding with said first axis so that said coupling member is gradually moved by said second guide surface to said inoperative position during rotation of said power roll;
  • a plurality of type action drives as claimed in claim 4 comprising adjusting means mounted on said supporting means and being connected with said guide means of said type actions for simultaneously adjusting the positions of the same so that the moments ofengagement between said guide means and said coupling members and of separation of said coupling members from said power roll can be collectively varied by said adjusting means.
  • Type action drive as claimed in claim 4 wherein said adjusting means includes an adjusting screw threaded into a bore of said supporting means and having said portion which is located in said slot.
  • Type action drive as claimed in claim 4 wherein said guide lever is angular and has a first arm formed with said slot and a second arm cooperating with said camming surface, and includes a pivot between said arms; and wherein said supporting means are formed with a slot receiving said pivot.
  • each type action drive comprises a key lever; spring biassed linkage means connecting said key lever with said coupling member for moving the same from said inoperative position to said operative position upon actuation of said key lever; and a stop bar resiliently mounted on said supporting means for stopping said key levers after actuation of said coupling m'embers, respectively.
  • Type action drive as claimed in claim 1 wherein said coupling member has an arm with s aid first guide surface; wherein said first guide surface is said camming surface; wherein said guide means is mounted for turning movement; and wherein said manual adjusting means is mounted on said supporting means and being operatively connected with said guide means for angularly displacing the same so that the moments of engagement between said guide means and said camming surface and of separation of said coupling member from said power roll can be varied by adjustment of said adjusting means.

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  • Accessory Devices And Overall Control Thereof (AREA)
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US817376A 1968-04-20 1969-04-18 Type action drive Expired - Lifetime US3623587A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681761226 DE1761226B2 (de) 1968-04-20 1968-04-20 Typenhebelgetriebe fuer kraftangetriebene schreib oder aehnliche maschinen

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US3623587A true US3623587A (en) 1971-11-30

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US817376A Expired - Lifetime US3623587A (en) 1968-04-20 1969-04-18 Type action drive

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US (1) US3623587A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) AT287023B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH467163A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1761226B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1596544A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1239969A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6810018A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE326204B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738470A (en) * 1970-07-02 1973-06-12 Citizen Watch Co Ltd Power driven type action in electric typewriter
US3838762A (en) * 1973-02-16 1974-10-01 Litton Business Systems Inc Type action arrangement
US3858509A (en) * 1972-07-10 1975-01-07 Xerox Corp Control logic for print wheel and hammer of high speed printing apparatus
US3860103A (en) * 1973-02-28 1975-01-14 Litton Business Systems Inc Segment shift arrangement
US3915277A (en) * 1974-08-28 1975-10-28 Scm Corp Typing machine key action
US3976181A (en) * 1974-08-28 1976-08-24 Scm Corporation Typing machine repeat key action
US3981385A (en) * 1974-08-28 1976-09-21 Scm Corporation Typing machine key action
US4268177A (en) * 1978-11-01 1981-05-19 Plessey Peripheral Systems Paper thickness adjusting mechanism for impact printer
US4297043A (en) * 1978-11-01 1981-10-27 Plessey Peripheral Systems Impact printer inclined ribbon scanner

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2901079A (en) * 1957-09-30 1959-08-25 Smith Corona Marchant Inc Typewriter having power operated instrumentalities
US3062350A (en) * 1958-11-06 1962-11-06 Olympia Werke Ag Typewriter for manual or electric actuation
US3103272A (en) * 1959-09-09 1963-09-10 Sperry Rand Corp Power action for typewriter
US3129801A (en) * 1962-05-01 1964-04-21 Underwood Corp Power operated typewriter
US3197010A (en) * 1960-08-26 1965-07-27 Ibm Machine control devices
US3250365A (en) * 1963-05-02 1966-05-10 Olympia Werke Ag Apparatus for adjusting the impact forces of types
US3322254A (en) * 1966-08-17 1967-05-30 Royal Typewriter Co Inc Cam operated repeat mechanism
US3342295A (en) * 1965-03-15 1967-09-19 Brother Ind Ltd Repeat action mechanism for power operated typewriters
US3349885A (en) * 1965-03-20 1967-10-31 Grundig Max Type bar drive composed of two different components
US3393787A (en) * 1966-12-28 1968-07-23 Ibm Impression control mechanism
US3400799A (en) * 1966-04-30 1968-09-10 Grundig Emv High speed type action

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2901079A (en) * 1957-09-30 1959-08-25 Smith Corona Marchant Inc Typewriter having power operated instrumentalities
US3062350A (en) * 1958-11-06 1962-11-06 Olympia Werke Ag Typewriter for manual or electric actuation
US3103272A (en) * 1959-09-09 1963-09-10 Sperry Rand Corp Power action for typewriter
US3197010A (en) * 1960-08-26 1965-07-27 Ibm Machine control devices
US3129801A (en) * 1962-05-01 1964-04-21 Underwood Corp Power operated typewriter
US3250365A (en) * 1963-05-02 1966-05-10 Olympia Werke Ag Apparatus for adjusting the impact forces of types
US3342295A (en) * 1965-03-15 1967-09-19 Brother Ind Ltd Repeat action mechanism for power operated typewriters
US3349885A (en) * 1965-03-20 1967-10-31 Grundig Max Type bar drive composed of two different components
US3400799A (en) * 1966-04-30 1968-09-10 Grundig Emv High speed type action
US3322254A (en) * 1966-08-17 1967-05-30 Royal Typewriter Co Inc Cam operated repeat mechanism
US3393787A (en) * 1966-12-28 1968-07-23 Ibm Impression control mechanism

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738470A (en) * 1970-07-02 1973-06-12 Citizen Watch Co Ltd Power driven type action in electric typewriter
US3858509A (en) * 1972-07-10 1975-01-07 Xerox Corp Control logic for print wheel and hammer of high speed printing apparatus
US3838762A (en) * 1973-02-16 1974-10-01 Litton Business Systems Inc Type action arrangement
US3860103A (en) * 1973-02-28 1975-01-14 Litton Business Systems Inc Segment shift arrangement
US3915277A (en) * 1974-08-28 1975-10-28 Scm Corp Typing machine key action
US3976181A (en) * 1974-08-28 1976-08-24 Scm Corporation Typing machine repeat key action
US3981385A (en) * 1974-08-28 1976-09-21 Scm Corporation Typing machine key action
US4268177A (en) * 1978-11-01 1981-05-19 Plessey Peripheral Systems Paper thickness adjusting mechanism for impact printer
US4297043A (en) * 1978-11-01 1981-10-27 Plessey Peripheral Systems Impact printer inclined ribbon scanner

Also Published As

Publication number Publication date
SE326204B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-07-20
NL6810018A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1969-10-22
DE1761226A1 (de) 1971-04-22
DE1761226B2 (de) 1971-12-02
CH467163A (de) 1969-01-15
GB1239969A (en) 1971-07-21
FR1596544A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-06-22
AT287023B (de) 1971-01-11

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

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