US1390708A - Typewriting-machine - Google Patents

Typewriting-machine Download PDF

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Publication number
US1390708A
US1390708A US481771A US48177121A US1390708A US 1390708 A US1390708 A US 1390708A US 481771 A US481771 A US 481771A US 48177121 A US48177121 A US 48177121A US 1390708 A US1390708 A US 1390708A
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US
United States
Prior art keywords
type
bar
type bar
link
key
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
US481771A
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English (en)
Inventor
Hess Edward Bernard
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.)
Royal Typewriter Co Inc
Original Assignee
Royal Typewriter Co Inc
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 Royal Typewriter Co Inc filed Critical Royal Typewriter Co Inc
Priority to US481771A priority Critical patent/US1390708A/en
Application granted granted Critical
Publication of US1390708A publication Critical patent/US1390708A/en
Priority to FR544285D priority patent/FR544285A/fr
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
    • B41J7/00—Type-selecting or type-actuating mechanisms
    • B41J7/02—Type-lever actuating mechanisms

Definitions

  • This invention relates particularly to type actions for typewriting machines, and especially to the class of actions in Whlch togle connections are made between the key evers and the type bars, such connectlons being so organized that the movement of the type bars is accelerated as they move toward the printing point.
  • Such actlons are cominonly used in the Standard Royal machines and are shown in many prior patents, belng well illustrated, for instance, in Patent No. 1,084,547, of Jan. 13, 1914.
  • th1s movement is arrested quickly before the type reach the platen while the momentum of the type bars, obtained by this accelerated movement, causes the type to impinge the platen with reduced force and w1th consequent reduction in noise but with sufiiclent power to make clear impress ons.
  • the key levers are connected to the front links of the toggles 1n the way commonly employed in Royal machines and the front links are connected with the heels of the type bars by pultlinks in a novel way.
  • the front links are connected therew1th at selected points approximately in vertlcal planes below the pivotal connec tlons between the type bars and the segments so that in operation the points of pivotal connection between the pull links and the heels of the type bars instead of travehng in horizontal arcs, as heretofore, traverse arcs which are inclined forwardly and upwardly.
  • Fig. 1 is a detail view on an enlarged scale more clearly showing the relative arrangement of the pivot points of the pull link with the front link and with the heel of the type bar. It will be observed that in this case the pivot point at the rear end of the pull linkwith the heel of the type bar is directly under the pivotal connection of the type bar with the segment. It will also be observed that a line drawn from the pivotal connection of the pull link with the front link to the pivotal connection of the pull link with the type bar is arranged substantially at right angles to a line drawn from the pivotal connection of the pull link to the type bar to the pivot of the type bar.
  • Fig. 2 is a view of part of the mechanism shown in Fig. 1 and illustrates the position assumed by the part when a key lever has been fully depressed. It will be observed that the depression of the key lever does not cause the type bar to be carried fully to the platen.
  • Fig. 2 is a view on an enlarged scale of part of the mechanism shown in Fig. 2, and it will be observed that at this time the front and rear pivots of the pull link are in a direct line with the pivotal connection between the connected type bar and the segment.
  • Fig. 3 is a view similar to Fig. 1, showing how the type bar is drawn to a point a considerable distance in front of the platen when a key lever is fully depressed and it also shows how the type bar is carried by momentum to the platen after the key lever has been depressed, and it indicates that during this last movement of the type bar the key lever has been raised to some extent.
  • Fig. 3 is a View on an enlarged scale showing more clearly the arrangement of the parts shown in Fig. 3.
  • the pivotal connection of the pull link with the heel the type bar has moved from the position shown in Fig. 1 through an are which is inclined forwardly and upwardly, the dotted position indicated at 1 being the position the pull link assumes when the type bar has been raised to the position shown by dotted line in Fig.3.
  • the position indicated by the line 2 is the position that the pull link assumes when the type bar has been further moved forward or to its full extent in engagement with the platen.
  • the key lever has been raised to the position shown by full lines in Fig. 3.
  • the relative position of the lines shown in the diagram is somewhat exaggerated for purpose of clearness.
  • Parts of a typewriter carriage are indicated at A and B indicates part of the escapement mechanism.
  • a universal bar is shown at C and a type bar segment at D.
  • the platen is shown at E, F indicates a type bar guide and F part of a vibrator.
  • type bars G are formed with heels 9 and they are pivotally mounted at d in the usual way.
  • the type bars extend forwardly from their pivots as usual, their front or type-carrying ends being normally supported on a type bar rest H.
  • the heels of the type bars are connected by links I with the universal bar C and the return springs J of the type bars are connected to the rear portions of the heels of the type bars and to rear supports K which are adjustable by devices shown so that all the springs may be adjusted in unison.
  • the key levers L are pivotally supported at their rear ends in a support M, carrying an overhanging dust-shed N, and these levers are normally pulled against a cushion stop 0 by light springs P extending from the front of the shed to the levers and connected thereto a short distance in front of their pivots.
  • the front links Q are pivotally connected at q with a support R as heretofore, and each front link is connected by a rod or pull link S with the heel of a type bar. The length of this link may be adjusted by devices .9.
  • Each link Q is connected with a key lever L by a link T in the usual way.
  • the I connection between the pull link and the type bar is such that it traverses an are which is inclined forwardly and upwardly and the connections are such, as before stated, as to cause the type bar to be moved not all the way to the platen as heretofore but to a position in front of the platen, as indicated by dotted lines in Fig. 3, the further movement of the type bar to the platen being caused by the momentum of the bar.
  • the type action herein shown and described is such that the depression of a key carries the type with an accelerated movement to a predetermined position a considerable distance in front of the platen and this distance is suflicient to allow the t pe to further move by momentum only with a force which is suflicient only to produce a clear impression, but which is such as to effect a material reduction of noise.
  • a pivoted key lever a pivoted type bar, and connections therebetween, said lever and type bar lying in substantially parallel horizontal planes, and said connections including a link pivoted to the type bar in a substantially vertical plane with the type bar piv t and movable to a position in which said link pivot and type bar pivot lie in a substantially horizontal plane.
  • a noise reducing type action for typewriting machines comprising toggle link connections between a type bar and a key lever movable to such an extent by the full depression of the key as to move the type bar to a toggle-locking position in front of the platen and at such a distance therefrom as to reduce noise during a further move ment of the type bar about its pivot to the platen, caused by the momentum of the type bar.
  • a type action the combination of a key-lever, a type-bar, and connections therebetween, said connections including a link which is pivoted to the type-bar in a substantially vertical' ;plane with the typebar pivot when the parts are in normal position and moves during the depression of the key to a position in which the ends of the link and the type-bar pivot lie in a straight line.
  • a toggle locking connection comprising front links and pull links connected with the type bars and the keys, which are normally arranged at an oblique angle relatively to each other and at a reduced oblique angle when the keys are depressed to move the type bars to a link-locking position in advance of the platen and at such distance therefrom as to reduce noise during the further movement of the type barsto the platen caused by the momentum of the bars and during which latter period the obliquity of the angle between said links is increased.
  • a noise-reducing type action comprising a key lever, a type bar and toggle link connections between the type bar and the key lever, the rear end of each pull link being joined to the heel of the type bar below the point of its connection with the segment and said point of connection being pulled forward and upward when the key is depressed into line' with the pivot of the type bar and the pivot of the front end of the pull link with the front link whereby a positive movement of the type bar toward the platen is obtained, the further movement of the type bar to the platen being obtained by the momentum of the type bar.
  • a noise-reducing type action comprising a key lever, a type bar, a front link connected with the he lever, a pull link connecting the front link with the heel of the t pe bar, the pivotal connection of the pull link with the type bar and the pivotal connection of the pull link with the front link being in a line normally at approximately right angles to a vertical line drawn through the-pivot of the type bar and the rear pivotal connection of the front link, the connections between the key lever and said links being such that when a key is de ressed the pivotal connection of the pull lin r with the heel of the type bar is moved into a direct line between the pivot of the type bar and the pivotal connection of the pull link with the front link.
  • a noise-reducing type action comprising a key lever, a type bar, a front link connected with the key lever, a pull link connecting the front link with the heel of the type bar below its pivotal connection with the segment and at a point which traverses an are extending forwardly and up wardly, when the type bar moves toward the platen, to a point in a direct line passing through the pivot of the type bar and the front and rear pivots of the pull link when the key has been depressed to its full extent, the further movement of the type bar to the platen being caused by the momentum of the type bar which moves the pivotal connection between the pull link and the type bar upward and out of the direct line between the type bar pivot and front pivotal connection of the pull link with the front link.
  • a noise reducing type action for typewriting machines comprising toggle link connections between a type bar and a key lever movable to such an extent by the full depression of a key as to move the type bar to a toggle-locking position in front of the platen and at such a distance therefrom as to reduce noise during the further movement of the type bar about its pivot to the platen caused by the momentum of the type bar and at which time occurs a short return movement of the key lever which cushions the touch on the key.
  • a universal bar In a typewriting machine, a universal bar, a type action comprising a key-lever, a type-bar, and constantly acting positive connections therebetween, certain of said connections passing through a dead-center position during the travel of the type-bar to printing position, and connections from the type-bar to the universal bar which commences and continues to operate the latter only after the parts have passed said deadgenter position by the momentum of the type 10.
  • a noise-reducing type action comprising a pivoted type bar a key lever, a front link connected with the key lever, a pull link connected with the front link and with the heel of the type bar at a point which travels forwardly and upwardly when the type bar is raised by the depression of the key to a plane in a direct line between the pivot of the type bar and the pivotal points at opposite ends of the pull link, a return spring connected with the heel of the type bar, and a return spring connected with the key lever, and means for adjusting the tension of these springs.
  • a noise reduclng type action for typewriting machines comprising toggle link connections between a type bar and a key lever movable to such an extent by the full depression of the key as to move the type bar to a toggle-locking position in front of the platen and at a distance therefrom of considerably more than 5 to reduce noise during a further movement of the type bar about its pivot to the platen, caused by the momentum of the type bar.
  • a type action the combination of a key-lever, a type-bar, and connections therebetween, said connections including a member which is pivoted to the type-bar at a point substantia ly in the same vertical plane as the ty e-bar pivot when the parts are in normal position and moves during the depression of the key to a position in which the ends of the member and the type-bar pivot lie in a straight line.
  • a type action the combination of a key-lever, a type-bar, and toggle connections therebetween, said connections including a link which is pivoted to the type-bar at a point substantially in the same vertical plane as the type-bar pivot when the parts are in normal position and moves during the depression of the key to a position in which the pivotal connections at the ends of the link and the type bar pivot lie in a straight line.
  • a universal bar and a noise reducing type action connected therewith comprising link connections between a type bar and a key lever movable to such an extent by the depression of the key as to move the type bar to a link-locking position in front of the platen and at such a distance therefrom as to reduce noise during the further movement of the type bar to the platen caused by the momentum of the type bar While operating the universal bar, which latter operation commences and is completed during said further movement of the type bar.
  • a universal bar In a typewriting machine, a universal bar, a type action comprising a key, a type bar, and link connections between the type bar and the key movable to such an extent by the full depression of the key as to move the type bar to a link-locking osition in front of the platen and at suc distance therefrom as to reduce noise during the further movement of the type to the platen caused by the momentum of the type bar, and connections from the type bar to the universal bar which commence and continue to operate the latter only after said link connections have continued beyond said linklocking position.

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US481771A 1921-07-01 1921-07-01 Typewriting-machine Expired - Lifetime US1390708A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US481771A US1390708A (en) 1921-07-01 1921-07-01 Typewriting-machine
FR544285D FR544285A (fr) 1921-07-01 1921-12-07 Perfectionnements aux machines à écrire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US481771A US1390708A (en) 1921-07-01 1921-07-01 Typewriting-machine

Publications (1)

Publication Number Publication Date
US1390708A true US1390708A (en) 1921-09-13

Family

ID=23913329

Family Applications (1)

Application Number Title Priority Date Filing Date
US481771A Expired - Lifetime US1390708A (en) 1921-07-01 1921-07-01 Typewriting-machine

Country Status (2)

Country Link
US (1) US1390708A (fr)
FR (1) FR544285A (fr)

Also Published As

Publication number Publication date
FR544285A (fr) 1922-09-19

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