US3353646A - Typewriter having means to store characters selected during carriage movements - Google Patents

Typewriter having means to store characters selected during carriage movements Download PDF

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Publication number
US3353646A
US3353646A US579305A US57930566A US3353646A US 3353646 A US3353646 A US 3353646A US 579305 A US579305 A US 579305A US 57930566 A US57930566 A US 57930566A US 3353646 A US3353646 A US 3353646A
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United States
Prior art keywords
control
condition
print
line
platen
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
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US579305A
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English (en)
Inventor
Richard J Young
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International Business Machines Corp
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International Business Machines Corp
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Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US579305A priority Critical patent/US3353646A/en
Priority to GB35210/67A priority patent/GB1141587A/en
Priority to FR8634A priority patent/FR1538049A/fr
Priority to DE19671611448 priority patent/DE1611448B1/de
Application granted granted Critical
Publication of US3353646A publication Critical patent/US3353646A/en
Anticipated expiration legal-status Critical
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
    • B41J5/00—Devices or arrangements for controlling character selection
    • B41J5/08—Character or syllable selected by means of keys or keyboards of the typewriter type
    • B41J5/18—Locks
    • B41J5/22—Interlocks between keys, e.g. without detent arrangements

Definitions

  • My invention provides mechanism for preventing undesired printing during the performance of a long func tion, usually of indeterminate length (cg. line or carriage return, or tabulation) while permitting at least limited operation of character keys and without loss of information. More specifically, I provide means for storing character print information entered during the performance of a long function until the function is complete. At that time, the stored information is allowed to cause a print output. For example, with my invention, a typist may strike a letter key during a line return operation, but the letter will not print until the beginning of the new line has been reached.
  • Carriage return interlocks such as that of US. Patent 2,103,921 have provided their error preventing function at the expense of rhythm considerations since the interlocking function was accomplished by preventing key depression. It can be appreciated that a typist who misjudges the completion of a carriage return and encounters a physically blocked keybutton will be thrown off stride or will already be depressing a second key before recognizing that the first key did not cause a print. An error would result due to missing the first selected character. Presently, these conditions are mentally compensated for by positive effort on the typists part to avoid early typing. This solution of itself detracts from typing speed.
  • an object of my invention has been to provide a simple mechanism for preventing undesired printing during long functions, such as line return and tabulation, without interrupting the typists normal rhythm.
  • Another object of my invention has been to provide interlocking mechanism that extends the range of permissible typists timing error relative to termination of a long function, to avoid rhythm interruption and reduce error pressure.
  • my invention mechanism, is provided to recognize the continued performance of a long function which has been latched into operation, and to prevent initiation of any print cycle during such performance.
  • the keyboard employed has physically separated key entry from the print operation, information stored representative of a depressed key will simply be retained until the long function mechanism ceases to operate or is unlatched.
  • an interkey interlock that prevents simultaneous storage of information from plural character keybuttons. Accordingly, in the preferred embodiment of my invention, one key can be depressed during a long function and its information will be stored. A depression of a second key will be prevented however by the interkey interlock. It will be appreciated that one benefit gained by permitting a single character to be stored is the extension of the period of time for the typist to judge termination of a long function and thereby increase typing speed by'reducing the possibility of rhythm interruption and of error. Another benefit is the positive start signal produced for the operator by feeling the second key during line return. For example, a typist desiring to type the word I 3 during the remainder of the line return, the typist will feel the time to start typing the d and the remainder of the line by when the n key goes down.
  • the figure is a simplified perspective view of a typewriter showing the operative components of my preferred embodiment.
  • FIG. 1 shows a typewriter or printer having a platen 11 to provide paper holding means, a print element 12 cooperable with the platen 11 to provide printing means, a carrier 13 for supporting the print element 12 for lateral displacement relative to the platen 11, and a keyboard for providing operator control of printing and displacement of the print element 12.
  • the keyboard 20 includes character keys of which keys 21 and 22 are typical, and long function keys such as a line or carrier return key 23 and a tabulation key 24.
  • the character keys 21 and 22 are associated with individual code selecting interposers or transfer links 25 which provide the means for conveying character selection information from a depressed character key to the print element 12 through schematically shown selection and print drive mechanism 30.
  • the interposers 25 are normally retained leftwardly of storage latch springs 25a against the bias of individual coil springs 25b, and out of operative range of a rotatable filter shaft 26. This normal position of the interposer 25 is identified as its inactive state or condition.
  • Rotation of the filter shaft 26 and power driving of the selection and print drive mechanism 30 is accomplished through a cyclically operable print power control device such as a spring clutch 40.
  • Cycle initiation of clutch is controlled by a self restoring stop latch 41 having an operating link 42 and a control latch 43.
  • the operating link 42 is normally held in an inactive position, as shown, against the bias of a coil spring 44 by engagement between the control latch 43 and stationary frame 14.
  • a bail or universal bar 28 transmits the downward position of any interposer 25 in its stored condition to the control latch 43 thus permitting spring 44 to pull stop latch 41 to an active position out of engagement with the cycle clutch 40, thereby initiating a cycle of operation.
  • the cycle of operation causes various functions through mechanism known in the art and shown only schematically, including rotation of the filter shaft 26, impact driving of the type element 12 and letter feed escapement of the carrier 13.
  • the filter shaft 26 rotates, it drives the previously displaced interposer 25 leftwardly to cause print selection by bails 25c and restores the interposer to its inactive state all as more completely described in aforesaid Patent 3,086,635.
  • the condition of the interposer 25 while in leftward or character selection controlling motion is identified as its control state or condition.
  • An interkey ball interlock 29 is provided to prevent the simultaneous presence of two interposers 25 in the storage state which would cause an erroneous character selection.
  • the ball interlock 29 is constructed however, to permit one interposer 25 to be in the control state and a second interposer 25 to be placed in the storage state.
  • Displacement of the carrier 13 along its supporting rail 15 relative to the platen 11 is accomplished through energy supplied by a cord 51 that is guided in a closed loop by pulleys 52 to a power capstan 53.
  • the cord 51 is driven in one direction by a spiral main spring 54 for forward or left to right movement, and by a motor 55 in the reverse direction.
  • the motor 55 also serves to wind the spring 54 and provide the rotational energy controlled by the cycle clutch 40.
  • the letter feed escapement control itself forms no part of this invention and reference may be had to pages 39 through 42 particularly of the aforesaid Instruction Manual for details thereof.
  • Shaft 61 is rotated counterclockwise by a mechanism that initiates the line return operation in response to key depression and is retained by latch arm 62 and latch link 63 in the operative or line return on position until a margin stop 64 engages a counterstop 65 indicating that the left margin or new line position has been reached.
  • Counterstop 65 drives the :margin stop 64 and margin rack 66 leftwardly against a coil spring 67 to rotate a bell crank 68 counterclockwise pivoting latch link 63 counterclockwise and releasing the line return control arm 62 to return to the line return off condition.
  • proper line return operation involves not only driving of the carrier 13 but also appropriate control of the normal letter feed mechanism, backspace mechanism and index or line feed mechanism. However, as such control is known in the art and forms no part of this invention, it is not specifically disclosed herein.
  • Tabulation or random length forward continued movement of the carrier 13 is accomplished as known in the art simply by freeing the carrier 13 from its normal letter feed control (not shown) and permitting main spring 54 to pull the carrier to the right until a preset tab stop 71 is encountered by a sensing finger 72, at which time the normal letter feed escapement is placed back in control of the carrier 13.
  • main spring 54 As control over the letter feed mechanism to accomplish tabulation forms no part of this invention, specific description thereof, is unnecessary. Reference may be had however to pages 59 through 64 of the aforesaid instruction manual for appropriate details.
  • the tabulation control lever 73 which senses and determines the continued operation of the tabulating mechanism.
  • the tabulation control lever 73 is shown in its normal position pivotally and slidably mounted on a carrier mounted pivot stud 74 where it is retained by a coil spring 75.
  • a control torque bar 76 engages a control finger 73a and feedback finger 73b of the control lever 73 to provide a mechanical connection between the moving carrier 13 and the stationary operating mechanisms of the typewriter. It can be seen that clockwise pivoting of the torque bar 76 against control finger 73a drives the control lever 73 clockwise about pivot stud 74 permitting a latch link 77 to fall behind its outer end.
  • the lever 73 is thus stored in its projected or active position. In this position, the escapement mechanism (not shown) is manipulated to permit tabulation motion of the carrier 13.
  • Feedback finger 73b engages the torque bar 76 and retains it in the clockwise position so long as the control lever is latched by link 77 into active position.
  • the sensing finger 72 strikes a preset tab stop 71, and control lever 73 is driven leftwardly against spring 75, beyond the effective reach of latch link 77.
  • Spring 75 thus restores the control lever 73 counterclockwise to its original inactive position. In this position, the control of the carrier 13 is restored to the escapement mechanism (not shown).
  • Initial operation of the tabulation mechanism is controlled by key 24 which can operate through suitable mechanism such as a power device or simply linkage 78, to rotate or pivot the torque bar 76 as previously described.
  • an interrupter finger or stop member 80 that is mounted for pivotal movement on a shaft 81 and normally biased by an upwardly inclined spring 82 to a position of noninterference with the clutch operating link 42.
  • the interrupter 80 is rotatable against spring 82 to a position wherein it intercepts a shoulder or edge surface 45 of the operation link 42 in its leftward motion by spring 44.
  • the clutch latch 41 is thus inhibited from its normal response to movement of bail 82.
  • Shaft 81 includes an upwardly projecting crank portion 83 to which is attached both a control link 69 that moves leftward in response to the active position of line return control member 61 taken from latch arm 62, and a control link 79 which moves leftward in response to the active position of the tabulation control member 73 acting through the torque bar 76.
  • the control links 69 and 79 are connected permissively to the crank portion 83 by slot-ted brackets 84 such that movement of either control link leftwardly rotates the shaft 81 counterclockwise without interference with the other control link.
  • timing considerations are involved, as a matter of design, between the time the line return mechanism is unlatched and the carrier settles at the margin, and the time required for print to occur after release of the interrupter 80, to assure printing at the margin.
  • tabulation is initiated by the depression of key 24, when control lever 73 is moved to and stored in its projected or active position by clockwise pivoting of torque bar 76.
  • Feedback finger 73b of control lever 73 maintains the torque bar 76 in its pivoted position and through control link 79 pivots shaft 81 and moves interrupter 80 into alignment with surface 45.
  • Subsequent depression of a character key is stored as previously explained. Termination of the tabulation restores torque bar 76 to its counterclockwise position and permits the interrupter finger 80 to move out of the path of surface 45.
  • a typewriter having a keyboard, a platen, printing means cooperable therewith under the control of said keyboard, and means supporting said platen and said printing means for relative movement along a writing line, the improved control mechanism comprising:
  • each of said transfer links having a normal inactive condition, a stored condition, and a control condition, each of said transfer links when in its control condition being operative to effect printing of an associated character;
  • a cyclically operable print power control device for effecting print operation in conjunction with said transfer links
  • a line return mechanism operatively connected to one of said printing means and said platen for causing relative movement thereof from an advanced line position to a new line position, said line return mechanism comprising a control member having a normal inactive position and an active position indicative of line return operation;
  • a latch operatively associated with said control member for retaining said control member in its active position when independently moved thereto;
  • said cycle initiating means comprises a movable operating link having an active condition and an inactive condition
  • said ancillary means comprises a finger movable to a position of cooperation with said operating link when in its inactive condition to limit movement thereof;
  • a typewriter as defined in claim 1 wherein:
  • said cycle initiating means comprises a movable operating link having active condition and an inactive condition
  • said ancillary means comprises a finger movable to a position of cooperation with said operating link when in its inactive condition to limit movement thereof;
  • a typewriter defined in claim 1' further comprising an interkey interlock operatively associated with all of said transfer links for preventing the multiple presence of transfer links in said storage state.
  • a typewriter as defined in claim 4 further comprising:
  • a tabulation mechanism operatively connected to said printing means and said platen for causing relative movement thereof to an advanced line position, said tabulation mechanism comprising a tabulation control member having normal inactive position and an active position indicative of continued tabulation operation;
  • a tabulation latch operatively associated with said tabulation control member for retaining said tabulation control member in its active position when independently moved thereto;
  • a typewriter having a keyboard, a platen, printing means cooperable therewith under the control of said keyboard, and means supporting said platen and said printing means for relative movement along a writing line, the improved control mechanism comprising:
  • each of said transfer links having a normal inactive condition, a stored condition, and a control condition, each of said transfer 8 links when in its control condition being operative to effect printing of an associated character;
  • a cyclically operable print power control device for effecting printing operations in conjunction with said transfer links
  • a tabulation mechanism operatively connected to one of said printing means and said platen for causing rela-- tive movement thereof to an advanced line position, said tabulation mechanism comprising a control member having a normal inactive position and active: position indicative of tabulation operation;
  • a latch operatively associated with said control mem-- ber for retaining said control member in its active position when independently moved thereto;
  • a typewriter as defined in claim 6 further comprising an interkey interlock operatively associated with all of said transfer links for preventing the multiple presence of transfer links in said storage state.
  • a typewriter having a keyboard, a platen, printing means cooperable therewith under the control of said keyboard, and means supporting said platen and said printing means for relative movement along a writing line, the improved control mechanism comprising:
  • each of said transfer links having a normal inactive condition, a stored condition, and a control condition, each of said transfer links when in its control condition being operative to effect printing of an associated character;
  • a cyclically operable print power control device for effecting printing operations in conjunction with said transfer links
  • a print position locating mechanism operatively connected to one of said printing'means and said platen for causing relative movement thereof a random distance to a predetermined print position, said mechanism comprising a control member having a normal inactive position and active position indicative of a print position relocating operation;
  • a latch operatively associated with said control member for retaining said control member in its active. position when independently moved thereto;

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US579305A 1966-09-14 1966-09-14 Typewriter having means to store characters selected during carriage movements Expired - Lifetime US3353646A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US579305A US3353646A (en) 1966-09-14 1966-09-14 Typewriter having means to store characters selected during carriage movements
GB35210/67A GB1141587A (en) 1966-09-14 1967-08-01 Keyboard operated printer
FR8634A FR1538049A (fr) 1966-09-14 1967-08-07 Système de verrouillage avec emmagasinage de caractères
DE19671611448 DE1611448B1 (de) 1966-09-14 1967-09-13 Vorrichtung zur selbsttaetigen Steuerung der Typenanschlagfolge bei von Hand betaetigbaren,kraftangetriebenen Schreibmaschinen

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US579305A US3353646A (en) 1966-09-14 1966-09-14 Typewriter having means to store characters selected during carriage movements

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DE (1) DE1611448B1 (fr)
FR (1) FR1538049A (fr)
GB (1) GB1141587A (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490572A (en) * 1967-10-02 1970-01-20 Singer Co Print head carrier drive structure employing same clutch for carrier return and backspace
US3568811A (en) * 1968-09-20 1971-03-09 Litton Business Systems Inc Memory system for an electric typewriter
US3670861A (en) * 1970-09-10 1972-06-20 Extel Corp Carriage drive for high speed printer
US3718243A (en) * 1970-11-13 1973-02-27 Olympia Werke Ag Apparatus for storing typing commands given in too rapid succession by keys
US3721327A (en) * 1970-07-11 1973-03-20 Olympia Werke Ag Storing and interlocking typewriter input mechanism
US3727742A (en) * 1969-06-14 1973-04-17 Olympia Werke Ag Adjustable blocking means for typing and printing mechanisms
US3759360A (en) * 1969-05-31 1973-09-18 Olympia Werke Ag Apparatus for the control of type printing sequences
US3777869A (en) * 1969-07-23 1973-12-11 Olympia Werke Ag Type action drive
US3792767A (en) * 1972-03-17 1974-02-19 Addressograph Multigraph Justifying typewriter with conjointly oppositely movable type head and platen
US3817366A (en) * 1969-12-27 1974-06-18 Triumph Werke Nuernberg Ag Keyboard controlled encoding mechanism
US3951249A (en) * 1973-11-24 1976-04-20 U.S. Philips Corporation Drive for the movable portion of a printer
US4277192A (en) * 1978-02-01 1981-07-07 Brother Industires, Ltd. End of line locking mechanism for power operated typewriter
US4283150A (en) * 1978-05-27 1981-08-11 Brother Kogyo Kaisha Typewriter
US4335971A (en) * 1980-03-07 1982-06-22 The Perkin-Elmer Corporation Recorder paper drive

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1957471C3 (de) * 1969-11-15 1975-12-11 Olympia Werke Ag, 2940 Wilhelmshaven Vorrichtung zur selbsttätigen Steuerung der Typenabdruckfolgen bei von Hand betätigbaren kraftangetriebenen Schreiboder ähnlichen Büromaschinen

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1419172A (en) * 1920-06-02 1922-06-13 Underwood Computing Machine Co Typewriting machine
US1824099A (en) * 1926-02-11 1931-09-22 Elliott Fisher Co Typewriting machine
US2103921A (en) * 1937-02-20 1937-12-28 Underwood Elliott Fisher Co Typewriting machine
US2879876A (en) * 1955-11-17 1959-03-31 Ibm Single element printing machine
US3045799A (en) * 1960-08-25 1962-07-24 Sperry Rand Corp Keyboard interlock control means
US3077971A (en) * 1962-03-29 1963-02-19 Ibm Case shift interlock for typewriter
US3086635A (en) * 1961-07-14 1963-04-23 Ibm Keylever storage mechanism
US3157265A (en) * 1962-03-29 1964-11-17 Ibm Print interlock for typewriter
US3191740A (en) * 1962-07-24 1965-06-29 Royal Mcbee Corp Keylever signal storing mechanism
US3195707A (en) * 1962-07-16 1965-07-20 Royal Mcbee Corp Keylever signal storing mechanism
US3268051A (en) * 1961-10-27 1966-08-23 Grundig Max Means preventing simultaneous operation of carriage return and any other carriage control function

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1419172A (en) * 1920-06-02 1922-06-13 Underwood Computing Machine Co Typewriting machine
US1824099A (en) * 1926-02-11 1931-09-22 Elliott Fisher Co Typewriting machine
US2103921A (en) * 1937-02-20 1937-12-28 Underwood Elliott Fisher Co Typewriting machine
US2879876A (en) * 1955-11-17 1959-03-31 Ibm Single element printing machine
US3045799A (en) * 1960-08-25 1962-07-24 Sperry Rand Corp Keyboard interlock control means
US3086635A (en) * 1961-07-14 1963-04-23 Ibm Keylever storage mechanism
US3268051A (en) * 1961-10-27 1966-08-23 Grundig Max Means preventing simultaneous operation of carriage return and any other carriage control function
US3077971A (en) * 1962-03-29 1963-02-19 Ibm Case shift interlock for typewriter
US3157265A (en) * 1962-03-29 1964-11-17 Ibm Print interlock for typewriter
US3195707A (en) * 1962-07-16 1965-07-20 Royal Mcbee Corp Keylever signal storing mechanism
US3191740A (en) * 1962-07-24 1965-06-29 Royal Mcbee Corp Keylever signal storing mechanism

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490572A (en) * 1967-10-02 1970-01-20 Singer Co Print head carrier drive structure employing same clutch for carrier return and backspace
US3568811A (en) * 1968-09-20 1971-03-09 Litton Business Systems Inc Memory system for an electric typewriter
US3759360A (en) * 1969-05-31 1973-09-18 Olympia Werke Ag Apparatus for the control of type printing sequences
US3727742A (en) * 1969-06-14 1973-04-17 Olympia Werke Ag Adjustable blocking means for typing and printing mechanisms
US3777869A (en) * 1969-07-23 1973-12-11 Olympia Werke Ag Type action drive
US3817366A (en) * 1969-12-27 1974-06-18 Triumph Werke Nuernberg Ag Keyboard controlled encoding mechanism
US3721327A (en) * 1970-07-11 1973-03-20 Olympia Werke Ag Storing and interlocking typewriter input mechanism
US3670861A (en) * 1970-09-10 1972-06-20 Extel Corp Carriage drive for high speed printer
US3718243A (en) * 1970-11-13 1973-02-27 Olympia Werke Ag Apparatus for storing typing commands given in too rapid succession by keys
US3792767A (en) * 1972-03-17 1974-02-19 Addressograph Multigraph Justifying typewriter with conjointly oppositely movable type head and platen
US3951249A (en) * 1973-11-24 1976-04-20 U.S. Philips Corporation Drive for the movable portion of a printer
US4277192A (en) * 1978-02-01 1981-07-07 Brother Industires, Ltd. End of line locking mechanism for power operated typewriter
US4283150A (en) * 1978-05-27 1981-08-11 Brother Kogyo Kaisha Typewriter
US4335971A (en) * 1980-03-07 1982-06-22 The Perkin-Elmer Corporation Recorder paper drive

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GB1141587A (en) 1969-01-29
FR1538049A (fr) 1968-08-30
DE1611448B1 (de) 1970-07-30

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