US3232405A - Typewriter escapement mechanism with spacing means - Google Patents

Typewriter escapement mechanism with spacing means Download PDF

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Publication number
US3232405A
US3232405A US290777A US29077763A US3232405A US 3232405 A US3232405 A US 3232405A US 290777 A US290777 A US 290777A US 29077763 A US29077763 A US 29077763A US 3232405 A US3232405 A US 3232405A
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United States
Prior art keywords
escapement
pawl
movement
typewriter
distance
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
US290777A
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English (en)
Inventor
Neil D Walton
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Priority to US290777A priority Critical patent/US3232405A/en
Priority to GB22276/64A priority patent/GB1060756A/en
Priority to FR978390A priority patent/FR1401607A/fr
Priority to NL646406796A priority patent/NL144866B/xx
Priority to AT523064A priority patent/AT260960B/de
Priority to CH799964A priority patent/CH410025A/de
Priority to DEI26053A priority patent/DE1293168B/de
Priority to FI1358/64A priority patent/FI43600B/fi
Priority to NO155806A priority patent/NO116038B/no
Priority to DK319264AA priority patent/DK118254B/da
Priority to ES0301401A priority patent/ES301401A1/es
Priority to SE7792/64A priority patent/SE307142B/xx
Application granted granted Critical
Publication of US3232405A publication Critical patent/US3232405A/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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/18—Character-spacing or back-spacing mechanisms; Carriage return or release devices therefor
    • B41J19/34—Escapement-feed character-spacing mechanisms
    • B41J19/58—Differential or variable-spacing arrangements

Definitions

  • the present invention relates generally to the typewriter art and more particularly to an improved typewriter escapement mechanism.
  • the escapement mechanism comprises spacing means for advancing a movable typewriter carriage a predetermined distance which is less than the normal or standard escapement distance.
  • a typewriter has a movable carriage which is moved in the character spacing direction to effect relative longitudinal movement between the printing means and a paper holding means.
  • the printing means may comprise a series of type bars or a single print head and the paper holding means includes a rotatable platen and associated apparatus. Either the printing means or the paper holding means can be mounte for movement with the movable carriage.
  • the carriage is spring biased for movement in the charac ter spacing direction and movement in this direction is controlled by the escapement mechanism.
  • the escapement mechanism allows the carriage to move in the character spacing direction a distance corresponding to the associated character or space between adjacent words. A line of printing is formed on the paper in this manner.
  • a common typist mistake is to leave out a character in a word or to include an extra character in a word.
  • the typist may not realize that a mistake has been made until several additional words have been typed or, in fact, until the entire page has been typed.
  • To correct a Word where a character has been omitted the erroneous word and all typing on the same line to the right of this word must be erased and retyped if spacing between the words is to be maintained. This is a time-consuming task and in many cases the typist will retype the entire page rather than try to correct the mistake.
  • a word includes an extra character, only the word in error need be erased and retyped. However, an abnormally large space is left between the corrected Word and an adjacent word which seriously detracts from the appearance and quality of the typed page.
  • the typist in certain typing applications, is required to type a predetermined amount of material in an area on the page which is slightly larger or smaller than the area normally required for the material.
  • the available area is too small, it is practically impossible for the typist to type the material in a manner where the typing is of acceptable quality.
  • the area is too large, spaces of widely varying dimensions may be left between the words. Such widely varying spaces are readily apparent to the observer and detract from the appearance of the printing.
  • the present invention provides an escapemcnt mechanism for typewriters having spacing means which can be actuated by the typist to advance the typewriter carriage a distance corresponding to a predetermined increment of the normal or standard escapement distance. Thereafter, the carriage moves the standard escapernent distance when the character and space keys are depressed until the spacing means is again actuated. Means are also provided for automatically again actuating the spacing means in response to initiation of certain typewriter functions by the typist, such as carriage return and tabulation.
  • a pivoted escapement pawl having a slot therein co-operates with a spring biased escapement rack in advancing the carriage in a character spacing direction.
  • a key on the typewriter keyboard controls the spacing means which is operative to change the point of pivotal mounting of the escapement pawl and provides for movement or" the escapement rack by a predetermined distance, such as one-half the normal escapement distance.
  • the spacing means also changes the position of the stop means which limit longitudinal movement of the escapernent pawl when the same is disengaged from the escapement rack.
  • the spacing means allows a specific amount of typing material to be included in an area which, considering the standard escapement movement of the carriage, is too large or too small for the material in such a manner that the typed material does not appear overly crowded or have large varying spaces between the words.
  • the spacing means can be employed for lengthening or shortening a line of typing to justify or even up the right hand margin in a manner similar to that employed by a typist when using a typewriter equipped with relatively complicated proportional escapernent mechanism.
  • a further object of the invention is the provision of a typewriter escapernent mechanism of the type described above which is extremely simplified in construction and operation but yet is highly reliable.
  • the escapement mechanism includes an escapement pawl and suitable actuating link for changing not only the efiective point of pivotal mounting of the escapement pawl but also the position of the stop means which limit longitudinal movement of the pawl.
  • the construction is such that the spacing means can be incorporated in existing typewriters with a minimum of design changes.
  • FIGURE 1 is a plan view of a typewriter escapement mechanism with spacing means constructed and operated in accordance with the teachings of the present invention
  • FIGURE 2 is a side sectional view taken along the section line 22 of FIGURE 1;
  • FIGURE 3 is a plan view illustrating the relative positions of certain parts of the escapement mechanism during a normal escapement operation
  • FIGURES 4 and 5 are plan views showing the relative positions of certain parts of the escapement mechanism immediately after the spacing means has been actuated.
  • FIGURE 6 is a plan view similar to that of FIGURE 1 illustrating the positions of certain parts of the escapement mechanism after the spacing means has again been actuated to insert a second half space in a line of printing.
  • the reference numeral 10 designates generally an escapement mechanism with spacing means.
  • the escapement mechanism comprises an elongated escapement rack 11 which is urged in a character spacing direction as illustrated by arrow 12 under the action of a spring motor 13.
  • the escapement rack 11 and the spring motor 13 are interconnected by a drive means 14, such as flexible tape.
  • Mounted for movement with the rack 11 is a typewriter carriage 15 which carries the printing means or the paper holding means of the typewriter as will be understood by those skilled in the art.
  • An escapement pawl 17 having an elongated slot 18 therein is pivotally mounted on a shouldered stud 19 from a stationary portion of the typewriter.
  • a spring 21 ⁇ has one end rigidly attached to the typewriter frame and the other end connected to an'arm 21 of the escapement pawl. The arrangement is such that a tip portion 22 of the pawl is normally biased into engagement with the teeth of rack 11 and carriage 15 is held against movement in the character spacing direction.
  • an actuating lever 25 having an elongated slot 26 therein.
  • a half space lever 27 Overlying the escapement pawl and pivoted on the stud 19 is a half space lever 27 whose use and operation will be hereinafter more fully explained.
  • the mounting of the pawl 17, pawl actuating lever 25 and half space lever 27 on the stud 19 is most clearly shown in FIGURE 2 of the drawings.
  • the lpawl actuating lever 25 has a vertically projecting tab 28 at the rear end thereof which engages a stop surface 29 on the half space lever 27 and is adapted to engage the projecting rear end 31 of pawl 17 when counterclockwise rotary motion is imparted to the actuating lever.
  • the actuating lever is normally maintained in the position shown in FIGURE 1 of the drawings by a spring 31.
  • the typewriter comprises a typewriter keyboard 32 whose keys, not shown, are operatively connected via actuating mechanism 33, such as a universal bar, to the pawl actuating lever. Whenever a character or space key on the typewriter keyboard is depressed, the pawl actuating lever 25 is rotated in the counterclockwise direction and tab 28 engages the rear end of pawl 17.
  • An escapement actuating mechanism of the general type so far described is employed on many typewriters, such as the IBM standard electric typewriter which is fully described in IBM Customer Engineering Instruction Manual-Model C-l Standard Typewriter, Form 24 1-5 065-0, copyright 1960 which is available from the IBM Corporation, Armonk, New York.
  • typewriter keyboard 32 and the actuating mechanism 33 may be of any well known construction capable of imparting a momentary counterclockwise rotary force to actuating lever 25 each time one of the character or space keys is actuated.
  • pawl actuating lever 25 is formed with a vertically extending tab 36 which is adapted to be engaged by an abutment 37 on the escapement pawl 17 during escapement movement.
  • a character or normal space key on the typewriter keyboard 32 is depressed, the tip 22 of escapement pawl is pivoted out of engagement with the teeth on the escapement rack 11 so that the rack and carriage 15 are free to move in the character spacing direction under the action of spring motor 13 as above described.
  • the escape ment pawl is free to move in the opposite direction under the action of spring 20 due to the elongated slot 18 in the pawl.
  • FIGURE 3 of the drawings The arrangement of the parts at this time during a normal escapement movement is shown in FIGURE 3 of the drawings.
  • the spring 20 exerts a force which pivots the tip 22 of the pawl back into engagement with the teeth of rack 11.
  • the tip portion of escapement pawl 17 moves over the tooth on the escapement rack which it previously engaged and back into the rack where it can be engaged by the next succeeding tooth on the rack in response to actuation of a character or normal space key.
  • the typist be provided with a means for advancing the escapement rack and carriage in the character spacing direction by a distance which is a predetermined increment of the normal character spacing distance.
  • a spacing means is extremely useful in correcting mistakes, arranging a predetermined amount of typing in a defined area or in justifying the right-hand margin.
  • the spacing means is operative to allow movement of the carriage by an amount equal to one-half of the normal escapement distance. This particular incremental distance should not be considered as limiting the present invention since this distance can be selected by the designer in accordance with principles which will be hereinafter more fully apparent.
  • half space lever 27 The rear end of half space lever 27 is formed to provide a hook-like extension 39 that is pivotally connected to a first arm 40 of a bellcrank lever 41.
  • the bellcrank lever is mounted from the frame of the typewriter by pivot pin 42 and a second arm 43 of this bellcrank is pivotally connected to an actuating link 44 which drivingly interconnects the escapement mechanism and a half space key 45.
  • the half space key 45 is preferably mounted on the typewriter keyboard 32 where the same is readily accessible to the typist. When half space key 45 is depressed the actuating link 44 is moved upwardly.
  • a stop plate 50 is rigidly attached to the frame of the typewriter by pivot pin 42 and a stud 51.
  • This stop plate has a pair of downturned tabs 52 on the opposite sides thereof which define stops that limit the pivotal movement of the bellcrank 41 and hence the rotation of half space lever 27. If desired, the stop plate 51) can be mounted for longitudinal movement with respect to the bellcrank whereby the extent of pivotal movement of the latter member can be adjusted.
  • a hairpin spring 54 has one end secured to the stud 51 and the other end connected to a stud 56 which is carried by arm 40 of the bellcrank 41.
  • the spring 54 defines an over center detent means for biasing and maintaining the bellcrank lever 41 in either of two rotary positions as determined by the position of stops 52 on stop plate 50 and the actuated state of half space key 45. If the key 45 is depressed, the bellcrank 41 will be rotated in a clockwise direction until the top of arm 49 engages the upper stop 52 of the stop plate. When the operator raises the key from the depressed state, the bellcrank 41 will rotate in the opposite direction and return to the position shown in FIGURE 1 of the drawings.
  • the pawl actuating lever 25 moves longitudinally under the action of spring 31 due to the enlongated slot 26 therein and the movement of cam surface at ⁇ behind the tab 23 on the pawl actuating lever.
  • the half space lever 27 is being rotated at this time but the relative movement of tab 36 away from abutment 37 is limited so the tip portion of the escapement pawl moves over the tooth on the escapement rack which it previously engaged and back into the rack where it can be engaged by the next succeeding tooth on the rack.
  • the abutment 37 engages tab 36 to limit movement of the pawl and the various parts are in the positions shown in FIGURE 4 of the drawings at this time.
  • the tip of pawl 17 is forced back into engagement with the teeth of escapement rack 11 by the action of spring 2G.
  • the rack and carriage continue to move in the character spacing direction and drive the escapement pawl in the same direction.
  • the half space lever 27 has continued its rotation in a counterclockwise direction whereby the actuating lever 25 has finished its longitudinal movement and a surface s2 of the shoulder 58 of the hair" space lever has moved up behind the projection 59 of the escapement pawl.
  • the surface 62 forms a stop which limits rearward movement of the pawl and the total movement of the escapement rack and carriage in the character spacing direction is one-half the distance of the normal or standard escapement distance.
  • the half space key 45 is now in the depressed condition with the half space lever 28 rotated to the position shown in FIGURE 5 of the drawings.
  • the escapement rack and carriage have been advanced by a distance equal to onehalf of the normal escapement distance.
  • the typist may continue typing with the escapement rack and carriage being advanced the normal escapement distance.
  • Actuation of a character or normal space key on the typewriter keyboard 32 causes counterclockwise movement of escapement pawl actuating lever so that tab 28 engages the rear end 30 of pawl 17 and moves the tip 22 thereof from the teeth of rack 11.
  • the rack and carriage are pulled in the character spacing direction by spring motor 13 while the pawl moves in the opposite direction under the influence of spring 20.
  • cam surface 60 on the half space lever 27 is such that the same relative spacing exists between the tab 36 and abutment 37 both before and after the half space key is actuated. This insures proper operation of the escapement mechanism during normal escapement operations.
  • half space lever 2-7 is rotated in a clockwise direction back to its 'uiitial position as is shown in FIGURE 6 of the drawings.
  • the surface on half space lever 27 is lowered and this allows the carriage, escapement rack and escapement pawl to move as a unit to the right until the forward edge of the slot 13 in pawl 17 engagesstud 19*.
  • the downward movement of cam surface 60 on the half space lever forces the cam actuating lever 25 to the right to reposition the tab 36.
  • a movement equal to one-half the normal escapement distance is provided and the rack and carriage are back in phase with the normal escapement movements.
  • the spacing means be automatically returned to its initial condition when certain machine functions, such as carriage return or tabulation, are initiated.
  • This is accomplished in the present instance by providing an extension 65 on the arm 4% of bellcrank 41 which is adapted to be131ly when the carriage return or tabulating mechanism is actuated.
  • extension 65 on the arm 4% of bellcrank 41 which is adapted to be131ly when the carriage return or tabulating mechanism is actuated.
  • These latter mechanisms form no portion of the present invention other than being able to apply a force to extension 65 which moves the beilcrank 41 back to its initial or home position as shown in FIGURE 1 of the drawings.
  • the key 45 is automatically lifted and half space lever 27 rotates in a clockwise direction.
  • Typewriter mechanisms other than those mentioned above can be connected with extension 65 for automatically returning the spacing means to its initial state.
  • the spacing means comprises apparatus for changing the position of the stop means which limit the longitudinal movement of the escapement pawl.
  • said stop means comprising a plurality of abutment surfaces carried by said escapement pawl and a plurality of stop surfaces;
  • first means for pivoting said escapement pawl about said stud to move said tip portion out of engagement with said teeth on said escapement member permit said second biasing means to advance said escapement pawl in said opposite direction and pivot said tip portion of said escapement pawl into engagement with said escapement member, and then permit said first biasing means to move said escapement pawl and-said escapement member in said character spacing direction;
  • stop means causing said escapement member to advance by said standard escapement distance when said first means for pivoting is actuated;
  • stop means causing said escapement member to advance by said distance less than said standard escapement distance when said second means for pivoting is moved to an actuated position
  • stop means being positioned after movement of said second means for pivoting to said actuated position to cause said escapement member to advance through said standard escapement distance when said first means for pivoting is actuated and said second means for pivoting remains in said actuated position.
  • said second means for pivoting mounts one of said stop surfaces
  • said one of said stop surfaces being moved from an inoperative position to a position where it is engaged by a corresponding abutment surface on said escapement pawl when said second means for pivoting is moved to said actuated position.
  • said first means for pivoting comprises a pawl actuating lever
  • said second means for pivoting comprises a spacing lever
  • said pawl actuating lever and said spacing lever being pivotally mounted on said stationary mounting stud.
  • said spacing lever has a cam surface thereon
  • said stop means comprising a plurlity of abutment surfaces carried by said escapement pawl and a plurality of stop surfaces;
  • first means for actuating said escapement pawl to move said tip portion out of engagement with said teeth on said escapement member permit said second biasing means to advance said escapement pawl in said opposite direction and move said tip portion of said escapement pawl into engagement with said escapement member, and then permit said first biasing means to move said escapement pawl and said escapement member in said character spacing direction;
  • stop means causing said escapement member to advance by said standard escapement distance when said first means for actuating is actuated;
  • stop means causing said escapement member to advance by said distance less than said standard escapement distance when said second means for actuating is moved to an operative position
  • stop means being positioned after movement of said second means for actuating to an actuated posi tion to cause said escapement member to advance through said standard escapement distance when said first means for actuating is actuated and said second means for actuazing remains in said operative position.

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  • Power-Operated Mechanisms For Wings (AREA)
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US290777A 1963-06-26 1963-06-26 Typewriter escapement mechanism with spacing means Expired - Lifetime US3232405A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US290777A US3232405A (en) 1963-06-26 1963-06-26 Typewriter escapement mechanism with spacing means
GB22276/64A GB1060756A (en) 1963-06-26 1964-05-29 Escapement mechanisms for typewriters
FR978390A FR1401607A (fr) 1963-06-26 1964-06-16 Mécanisme d'échappement d'une machine à écrire avec dispositif d'espacement
NL646406796A NL144866B (nl) 1963-06-26 1964-06-16 Verspringmechanisme voor een schrijfmachine.
CH799964A CH410025A (de) 1963-06-26 1964-06-18 Schrittschalteinrichtung für den Wagen von Schreib- und ähnlichen Maschinen
AT523064A AT260960B (de) 1963-06-26 1964-06-18 Schaltschritteinrichtung
DEI26053A DE1293168B (de) 1963-06-26 1964-06-19 Teilschrittschalteinrichtung fuer den Wagen von Schreib- und aehnlichen Maschinen
FI1358/64A FI43600B (enrdf_load_stackoverflow) 1963-06-26 1964-06-23
NO155806A NO116038B (enrdf_load_stackoverflow) 1963-06-26 1964-06-25
DK319264AA DK118254B (da) 1963-06-26 1964-06-25 Trinfremføringsmekanisme ved skrivemaskiner.
ES0301401A ES301401A1 (es) 1963-06-26 1964-06-25 Un mecanismo de escape para hacer avanzar el carro de una maquina de escribir.
SE7792/64A SE307142B (enrdf_load_stackoverflow) 1963-06-26 1964-06-26

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Application Number Priority Date Filing Date Title
US290777A US3232405A (en) 1963-06-26 1963-06-26 Typewriter escapement mechanism with spacing means

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US3232405A true US3232405A (en) 1966-02-01

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Application Number Title Priority Date Filing Date
US290777A Expired - Lifetime US3232405A (en) 1963-06-26 1963-06-26 Typewriter escapement mechanism with spacing means

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US (1) US3232405A (enrdf_load_stackoverflow)
AT (1) AT260960B (enrdf_load_stackoverflow)
CH (1) CH410025A (enrdf_load_stackoverflow)
DE (1) DE1293168B (enrdf_load_stackoverflow)
DK (1) DK118254B (enrdf_load_stackoverflow)
ES (1) ES301401A1 (enrdf_load_stackoverflow)
FI (1) FI43600B (enrdf_load_stackoverflow)
GB (1) GB1060756A (enrdf_load_stackoverflow)
NO (1) NO116038B (enrdf_load_stackoverflow)
SE (1) SE307142B (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385415A (en) * 1965-04-23 1968-05-28 Olympia Werke Ag Half spacing escapement mechanism for typewriters
US3409112A (en) * 1964-11-17 1968-11-05 Olympia Werke Ag Double spacing escapement mechanism having two pawls
US3515252A (en) * 1967-05-26 1970-06-02 Olympia Werke Ag Half spacing escapement mechanism
US3519115A (en) * 1967-09-11 1970-07-07 Singer Co Escapement mechanism responsive to the return portion of a reciprocal rotary motion
US3578132A (en) * 1967-02-06 1971-05-11 Olivetti & Co Spa Half-space carriage return mechanism for typewriters
US3752289A (en) * 1969-12-31 1973-08-14 Triumph Werke Nuernberg Ag Typewriter escapement and control devices therefor
US4408918A (en) * 1981-05-01 1983-10-11 Scm Corporation Halfspace control system for electronic typewriter with correction register
US5108203A (en) * 1980-10-31 1992-04-28 Canon Kabushiki Kaisha Printing apparatus including error correction and memory means, for printing vertical and horizontal form lines
EP2239554A1 (en) 2005-04-27 2010-10-13 Ventana Medical Systems, Inc. Automated high volume slide processing system
EP2362228A1 (en) 2007-07-10 2011-08-31 Ventana Medical Systems, Inc. Apparatus and method for biological sample processing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1554415A (en) * 1975-10-15 1979-10-17 Xerox Corp Word underscore(enhanced underscoring methods and means for automatic typewriter and the like employing hammertype impact printing mechanism)

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US505521A (en) * 1893-09-26 hamilton
US589387A (en) * 1897-08-31 gilbert
US1100669A (en) * 1912-08-09 1914-06-16 Underwood Typewriter Co Type-writing machine.
US1151493A (en) * 1915-04-16 1915-08-24 Sylvanus M Mann Type-writing machine.
US1867155A (en) * 1929-08-05 1932-07-12 Huston Variable spacing mechanism for typewriters
US1941018A (en) * 1932-08-08 1933-12-26 Wilfred J Long Variable spacer attachment for typewriters
US1950761A (en) * 1931-08-10 1934-03-13 Electromatic Typewriters Inc Typewriting machine
US2065629A (en) * 1934-07-23 1936-12-29 Underwood Elliott Fisher Co Typewriting machine
US2208806A (en) * 1936-08-21 1940-07-23 Remington Rand Inc Typewriting and like machine
US2237770A (en) * 1938-07-28 1941-04-08 Remington Rand Inc Typewriting and like machines
US2506444A (en) * 1947-06-05 1950-05-02 Ibm Power mechanism for typewriting machines
US2645324A (en) * 1950-09-26 1953-07-14 Allen Business Mach Adjustable escapement mechanism for typewriters
US2862593A (en) * 1952-05-08 1958-12-02 Ibm Denominational tabulating mechanism
US2872015A (en) * 1954-12-29 1959-02-03 Under Wood Corp Stepwise carriage positioning mechanism and related features
US2905303A (en) * 1955-12-29 1959-09-22 Ibm Escapement pawl control
US2972401A (en) * 1958-07-26 1961-02-21 Olivetti & Co Spa Variable spacing mechanism for typewriters

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BE488101A (enrdf_load_stackoverflow) * 1948-04-13
DE971657C (de) * 1951-09-30 1959-03-12 Olympia Werke Ag Einrichtung zum Schreiben von Ligaturen auf Schreibmaschinen
BE529316A (enrdf_load_stackoverflow) * 1953-06-04
DE1062733B (de) * 1953-10-30 1959-08-06 Siemens Ag Einrichtung zum Einstellen relativer Verschiebungen zwischen Schreibunterlage und Typentraeger einer Fernschreibmaschine in der Zeilenrichtung
DE1113700B (de) * 1955-07-23 1961-09-14 Olivetti & Co Spa Schrittschalteinrichtung an Schreibmaschinen fuer den Typenbreiten angepassten Schaltschritt
US2818958A (en) * 1955-12-29 1958-01-07 Ibm Escapement pawl control

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US505521A (en) * 1893-09-26 hamilton
US589387A (en) * 1897-08-31 gilbert
US1100669A (en) * 1912-08-09 1914-06-16 Underwood Typewriter Co Type-writing machine.
US1151493A (en) * 1915-04-16 1915-08-24 Sylvanus M Mann Type-writing machine.
US1867155A (en) * 1929-08-05 1932-07-12 Huston Variable spacing mechanism for typewriters
US1950761A (en) * 1931-08-10 1934-03-13 Electromatic Typewriters Inc Typewriting machine
US1941018A (en) * 1932-08-08 1933-12-26 Wilfred J Long Variable spacer attachment for typewriters
US2065629A (en) * 1934-07-23 1936-12-29 Underwood Elliott Fisher Co Typewriting machine
US2208806A (en) * 1936-08-21 1940-07-23 Remington Rand Inc Typewriting and like machine
US2237770A (en) * 1938-07-28 1941-04-08 Remington Rand Inc Typewriting and like machines
US2506444A (en) * 1947-06-05 1950-05-02 Ibm Power mechanism for typewriting machines
US2645324A (en) * 1950-09-26 1953-07-14 Allen Business Mach Adjustable escapement mechanism for typewriters
US2862593A (en) * 1952-05-08 1958-12-02 Ibm Denominational tabulating mechanism
US2872015A (en) * 1954-12-29 1959-02-03 Under Wood Corp Stepwise carriage positioning mechanism and related features
US2905303A (en) * 1955-12-29 1959-09-22 Ibm Escapement pawl control
US2972401A (en) * 1958-07-26 1961-02-21 Olivetti & Co Spa Variable spacing mechanism for typewriters

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3409112A (en) * 1964-11-17 1968-11-05 Olympia Werke Ag Double spacing escapement mechanism having two pawls
US3385415A (en) * 1965-04-23 1968-05-28 Olympia Werke Ag Half spacing escapement mechanism for typewriters
US3578132A (en) * 1967-02-06 1971-05-11 Olivetti & Co Spa Half-space carriage return mechanism for typewriters
US3515252A (en) * 1967-05-26 1970-06-02 Olympia Werke Ag Half spacing escapement mechanism
US3519115A (en) * 1967-09-11 1970-07-07 Singer Co Escapement mechanism responsive to the return portion of a reciprocal rotary motion
US3752289A (en) * 1969-12-31 1973-08-14 Triumph Werke Nuernberg Ag Typewriter escapement and control devices therefor
US5108203A (en) * 1980-10-31 1992-04-28 Canon Kabushiki Kaisha Printing apparatus including error correction and memory means, for printing vertical and horizontal form lines
US4408918A (en) * 1981-05-01 1983-10-11 Scm Corporation Halfspace control system for electronic typewriter with correction register
EP2239554A1 (en) 2005-04-27 2010-10-13 Ventana Medical Systems, Inc. Automated high volume slide processing system
EP3324171A1 (en) 2005-04-27 2018-05-23 Ventana Medical Systems, Inc. Automated high volume slide processing system
EP2362228A1 (en) 2007-07-10 2011-08-31 Ventana Medical Systems, Inc. Apparatus and method for biological sample processing

Also Published As

Publication number Publication date
NO116038B (enrdf_load_stackoverflow) 1969-01-20
DK118254B (da) 1970-07-27
ES301401A1 (es) 1965-01-16
AT260960B (de) 1968-04-10
FI43600B (enrdf_load_stackoverflow) 1971-02-01
DE1293168B (de) 1969-04-24
GB1060756A (en) 1967-03-08
CH410025A (de) 1966-03-31
SE307142B (enrdf_load_stackoverflow) 1968-12-23

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