US1681978A - Typewriting machine - Google Patents

Typewriting machine Download PDF

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Publication number
US1681978A
US1681978A US30265A US3026525A US1681978A US 1681978 A US1681978 A US 1681978A US 30265 A US30265 A US 30265A US 3026525 A US3026525 A US 3026525A US 1681978 A US1681978 A US 1681978A
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US
United States
Prior art keywords
carriage
ribbon
bar
type
lever
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
US30265A
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English (en)
Inventor
Harry A Foothorap
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.)
ELLIOTTFISHER Co
Original Assignee
ELLIOTTFISHER CO
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 ELLIOTTFISHER CO filed Critical ELLIOTTFISHER CO
Priority to US30265A priority Critical patent/US1681978A/en
Priority to GB15724/28A priority patent/GB313734A/en
Priority claimed from GB15724/28A external-priority patent/GB313734A/en
Priority to DEE39463D priority patent/DE549139C/de
Priority to CH135237D priority patent/CH135237A/de
Application granted granted Critical
Publication of US1681978A publication Critical patent/US1681978A/en
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
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/28—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing downwardly on flat surfaces, e.g. of books, drawings, boxes, envelopes, e.g. flat-bed ink-jet printers

Definitions

  • Tliisinvention relates to typewriting machines, and more particularly to what is known as a flat platen typewriter, character ized by a fiat plat-en, a frame, and a carriage so relatively arranged and moved-that matter printed on a worksheet,supported by the platen, would be properly line and letter spaced.
  • the object of the invention is to produce a novel organization of the machine which will simplify the construction, reduce. to a minimum the burden of operation, and secure complete visibility of the entire line being Written and the adjacent portion of the work.
  • Figure l is a plan view of a typewriting machine constructed in accordance with my invention.
  • Figure 2 is a vertical sectional view through the center of the machine, with a portion of the carriage supporting frame broken away and the platen omitted.
  • Figure 3' is a similar view, with a section talzenin a diiferent plane.
  • Figure 4 is a similar section, with a key depressed and the type arm swung down to the printing position.
  • Figure 5 is a vertical transverse section.
  • Figure 6 is a sectional plan view, line of section being just over the cover plan.
  • Figure 7 is another sectional plan, the plane of the section being below the sublever deck.
  • Figure 8 is a detailed section of the rib bon reversing shaft in its associated parts.
  • Figure 9 is a plan view of the type deck showing the relation thereto of the ribbon supporting means, the type guide and ribbon vibrator.
  • Figure 10 isa detailed perspective view of the ribbon vibrator.
  • Figures 11 and 12 are detailed views of the type guide.
  • Figure 13 is a diagrammatic view of: the type action.
  • Figures 14, 1-5, and 16 are respectively detailed views of a sublever, link, and type bar.
  • Figure 17 is a view of a type arm, its action, the universal bar. and the connections between the universal bar and the escapement.
  • Figure 18 is a detailed perspective view of the universal bar and its mounting.
  • FIG 19 is a detailed "iew of the ribbon vibrator, its mounting and a portion of its operating means.
  • Figures 20 and 21 are detailed views of a portion of the carriage. feeding mechanism.
  • Figure 22 is a detailed view of a portion of the ribbon mechanism.
  • FIGS 23 and 24 are detailed views of the color selecting mechanism.
  • Figure 25 is a detailed View showing portions of the carriage release and tabulating mechanism.
  • Figure 26 is a detail of a portion of the mechanism shown in Figure 25, and
  • Figure 27 is a detailed view of the tabu lating mechanism.
  • the general organization of the carriage includes a frame having two side plates 1 extended forwardly of the keyboard, connected by a front bar 2 of channel construction for rigidity. ners. the side plates 2 are spaced and con nected by a comparatively heavy corner bar 3, formed with a key lever comb bearing 4. downwardly extending bearing brackets 5 for the universal rock shaft and for the extending arm 6 which accommodatesthe tie rod which rigidly unites the corner bar 3 and the side plates 1.
  • the bar 3 is also At their upper rear cor-- formed with a rearwardly extending arm 8, through which extends a vertical shaft 9, carrying at its upper end a central carriage guide roller 10, which bears against a tran verse bar 11 of the carriage supporting frame 12.
  • the back plate 13 of the carriage frame Below the comb bearing 4, and extending'between the plates 1, is the back plate 13 of the carriage frame, the bottom of which is closed by a sublever deck 14:, the front edge of whichis located well in rear of the vertical plane of the bar 2, and is of arcuate form with an arcuate comb bearing 15 rising from the plane of the plate for the mounting of the sublevers of the type action, to be described presently.
  • the type lever deck 16 connected to the sublever deck by posts or hangers 17 of angular crosssection, located at the opposite sides or ends of the type lever deck at its front edge.
  • the deck or bottom plate 16 is supported from deck 14 by the main escapement bracket 18, screwed to a rearward extension 19 of the type lever deck.
  • carriage roller 10 behind the upper center of the carriage, constitutes a central bearing on the frame 12.
  • the three point suspension of the carriage is completed by two side rollers 20, mounted on bearing blocks 21, at
  • rollers 20 roll on a track 22, constituting a part of the carriage supporting frame 12, and front and rear guide rollers 23 and 24 bear against the rear and front faces of the rack and are likewise carried by the blocks 21, the rear rollers being adjustable as usual.
  • the carriage frame and carrying structure is completed by a cover plate 25 and a front comb plate 26, which serves the double purpose of closing the upper front portion of the casing and guiding the various key levers at a point well in advance of the fulcrums thereof.
  • the carriage of this machine is of a light rigid structure, supported entirely at the rear of the carriage by three point suspension from the carriage supporting frame 12, and that the carriage includes in its organization a keyboard, a sublever deck located below the rearof the keyboard, and a type bar deck located below the sublever deck and opposite the opening segment thereof.
  • the type bars 27 are journaled at their lower ends in the arcuate. bearing comb 28, carried by the type bar deck 16 concentric with the bearing comb 15' of the sublever. This disposes the type arms in a forwardly esse /e opening arcuate assemblage and they normally occupy the substantially upright position shown in Figure 3, with their upper ends against the arcuate buffer ring 29, carried by arms 30, extended from the deck 14.
  • the hub of each type arm is connected by the usual lug to the lower end of a link or draw bar- 30, preferable of tl-shaped or channeled crosssection, and disposed vertically behind the bar.
  • the upper end of the link 30 is pivotally connected to the lower end of the angular arm 31 of a bell crank sublever 32, the other or shorter arm 33 of which is, in turn, pivotally connected to an adjustable push rod 34:, connected at its upper end to a key lever 35 substantially midway between the fulcrumed and key of said key lever.
  • the type bar" guide The type bar" guide.
  • the carriage feeding mechanism The carriage feeding mechanism.
  • the carriage feeding mechanism is not novel, so far as theescapement or the immediately associated parts are concerned (see my Patent #1,203,519)'.
  • a carriage feed rack 38 is carried by the carriage supporting frame below the rear of the sublever deck 14, and mesheswith feed 'gears 39, the movements of which are controlled by an escapement mechanism indicated as a whole by 40.
  • the escapement 15 mounted between the main escapement bracket 18 and the rear escapement bracket 41, both of which, as in the patented construction, drop from the sublever deck.
  • the normal operation of the escapement is effected by the universal rocker or rock shaft 42, mounted in bearings 5, extending inwardly from the corner plate 13 of the carriage. From the rocker 42 extends downwardly, an arm 43, having a slot and pin connection with a bell crank 44 fulcrumed at 45, on a bracket 46 on the deck 14. If the rocker- 42 is rocked in a direction to swing the arm 43 upward and forward, the bell crank 44 will be rocked to operate the escapement through the draw wire 46*.
  • the shaft 42 is rocked as usual upon the depression of any type key, so that upon the printing of a character the carriage will feed forward to the next position.
  • Movable with the yoke and space key are swinging arms 54, the rear ends of which are converged and provided with pins which underlie the arms 47, which, as we have seen, are fixed to the universal rocker 42. Obviously, if the space key 51 is depressed, the arms 54 will elevate the arms 47 to operate the escapement, the retraction being effected by retractive springs 56.
  • Adjacent one end of the comb bearing 4 is mounted the carriage release lever 57,
  • the tabulator key 65 is mounted at the right hand end of the carriage on a tabulator key lever 66, mounted on a stud 67, and held in elevated position by a spring 68 (see Figures 5 and 6). Adjacent to its rear end the lever 66 is connected through an intermediate link 69 at one end of a lever 70, fulcrumed on a bearing 71- above the deck 14. The rear end of the lever overlies the angular end 72, of pivoted tabulator stop 73, carried by a tabulator block 74 and retained in an active position by a. spring 75.
  • the rear end of the lever 66 Upon the depression of the tabulator key 65, the rear end of the lever 66 will be elevated, thus elevating one end of the lever 70 and depressing the opposite end of said lever to swing the stop 73 and to project thesame into a path obstructed by one of a series of tabulator sto s 76, mountedon a tabulator bar- 77, carried y the carriage supporting frame 12 in rear of the carriage.
  • the back space mechanism The back space key 82 is connected by a lever 83, mounted at the end of the bearing comb 4-, and connected by a link 84 with sublever 85, mounted on a post 86, up
  • the carriage is propelled as usual in the direction of the letter spacing by a spring drum 89, connected to the carriage by a tape 90 and mounted on a bracket 91 at one end of the carriage supporting frame 12.
  • the usual clutches including the connecting clutch levers 102 and103, are provided with these levers or operated by two cam con trolling devices 104 and 105.
  • These controlling devices 104 and 105 are in the form of cams carried by bell crank levers 106, pivoted on the brackets 95, at a point between the cams and pins 107, which project outwardly from the other ends of the levers and overlie cranks 108 at the rear ends of ribbon control shafts 109, parallel with the spool shafts 93 and carrying at their front ends ribbon followers 110 and 111.
  • ribbon followers contact with the ribbon on the spools 112 and 113, mounted at the front ends of the spool shafts-93 by knurled screws 114.
  • the control shafts 109' are afforded bars in the brackets 95and the hangers 17, and each is under torsional tension from a spring 115, whichtends to rotate the shaft as the ribbon on the adjacent spooldixninishes and the ribbon follower is permitted to swing in toward the axis of the ribbon spool under the action of the spring 115.
  • the ribbon 116 is wound on and extends between the spools a d as th a ge adbeen sufliciently depleted, a crank 108 at the rear end of the adjacent control bar. swings the bell crank 106 to cause the control earn 104 or 105 to be placed in position to co-act with the adjacent clutch lever 102 or 103. Then, as movement of the carriage continues, the connected clutch levers will be swung to disconnect the engaged clutch and engage the disconnected clutch so that the driven spool shaft will be released and the other control shaft driven to reverse the direction or feeding of the ribbon.
  • the front guiding means is in the form of angular lugs 119, extending from the opposite sides of the vibrator and bent around the opposite edges of the type guide 36.
  • the rear guiding means is in the form of a head screw passed through a longitudinal slot 121 in the vibrator and screwed into the deck from its underside.
  • the ribbon When the printing mechanism is operated, however, the ribbon must be vibrated forwardly so as to come opposite the printing point, the location of which, relative to the machine, is indicated at G, in Figure 9.
  • This movement of the ribbon vibrator is accomplished by a vibrator lever 122 fulcrumed on a projection of the deck 16 at 123, and having its inner bifurcated end 124 engaged with a headed stud 125 in the rear end of the ,vibrator 118, A vibrator retracting spring 126, attached to the lever 122, retains the vibrator in its normal or retracted position.
  • thelever 122 At its outer end thelever 122 is connected by a link 127 to the lower end of a bell crank 128, fulcrumed at 129, and having its horizontal arm 130 formed with a longitudinal slot 131.
  • the slot 131, in the bell crank 128, is engaged by a. stud 132 fixed to the lower end of a draw rod 133,
  • the upper end of which is attached to an arm 134 extended from one end of the shaft 142.
  • the stud 132 is disposed at the extreme end of the slot 131 to secure a minimum movement of the vibrator when the-arm"134 is elevated. This movement of the arm takes place, as will be understood, when the shaft 42 is rocked, as heretofore described, upon the elevation of the universal bar 49 by the lugs 50 of the type action.
  • the shaft 42 will be rocked, the arm 134 will be raised, the draw wire 133 will be moved upward to swing the bell crank 128, and the lever 122 to advance the vibrator from the full line position to the distant line position in Figure 22, or from the fixed normal position to the fixed print ing position, which will present the front or black color stripe a of the ribbon under the type.
  • the connected parts, including the vibrator will return to normal position and the printing point of the work will be fully exposed.
  • the ribbon is divided into stripes of different colors, the one illustrated being what is known as a bichrome. the rear half of which is a red stripe 1).
  • the ribbon since it is desired to print inred the ribbon must be shifted laterally a greater distance from its normal position than before, because the rear red stripe, instead of the front black stripe, must be advanced to the printing point.
  • To secure this exaggerated throw of the ribbon it is merely necessary to move the stud 132 on the draw bar 133 along the slot 131 in the bell crank 128, for the purpose of moving the connection between the bell crank and the draw rod closer to the fulcrum of the lever, as the throw of the arm 134 is constant.
  • the color selection mechanism therefore, embraces 138, fulcrumed on a bracket 139 dropped from the deck 14.
  • the lower end of the bell crank 138 is bifurcated to engage a headed stud 140 on a shifter 141, movable in a fixed guide 142 and provided at the op )osite side of the guide 142 with a mova le guide 143 which engages the stud 132 on the draw rod 133.
  • the red ribbon key lever 136 it is depressed to swing the bell crank 138 and shift the shifter 141 and the guide 143 along the fixed guide 142,
  • the red ribbon lever is held in itsdepressed or operative position by latch 144, pivoted at 145 on a bracket 146 and urged in one direc- The latch engages a pin 148 on the lever and its upper end, when the red ribbon key is depressed, is disposed adjacent to be above the key for convenient release.
  • the movable printing carriage is some times mounted on a movable line space frame which moves longitudinally of a platen or work support, relative to which the carriage and printing mechanism moves in a lateral direction.
  • the transverse bar 149 carries a square plate 151 and. also, has a rearwardly extending horizontal flange 152 disposed over the horizontal roller 10.
  • Flange 152 diminishes in width from the center toward its outer ends, as shown in Figure 1.
  • a down strike typewriter the com located in earners bination with a supporting frame having upper and lower rails d sposed horizontally one above another, of a carriage having movable connection with said rails at its rear side and supported exclusively by such connections, and down strike printing mechanism mounted on the carriage in advance of the carriage support.
  • a supporting frame having upper and lower rails, a carriage having supporting rollers traveling on the lower rail, and a roller engaging the rear side of the upper rail to prevent forward tilting of the carriage, said rollers constituting the sole supporting means for the carriage, and down strike printing mechanism mounted on the carriage.
  • a down strike typewriter In a down strike typewriter, a stationary supporting frame having two transverse rails disposed one above another, a platen movable in the frame in one direction, a carriage supported exclusively by said rails, and down strike printing mechanism mounted on the carriage in advance of its exclusive support.
  • a stationary supporting frame having horizontal platen guides and carriage guides in right angular relation, the carriage guides being disposed one above another, a platen mounted in the platen guides, a carriage supported at its rear side exclusively by the carriage guides, and down strike printing mechanism mounted on the carriage.
  • a down strike typewriter the combination with a frame, a flat platen and a traveling carriage supported by the frame, of a down strike printing mechanism including type bars, sub-levers and a key board, upper and lower decks for the sublevers and type bars, the key board extending well in advance of both decks and the printing pointof the type bars also being located well in advance of the decks but below the front portion of the key board.
  • a down strike typewriter the combination with a frame, platen and movable carriage, of supporting means for the carriage located exclusively at its rear side, a horizontal type arm segment in the carriage, down strike type arms mounted in the segment and movable to a printing pointmaterially in advance of the entire segment, and a key board extending in advance of the vertical plane of the printing point and an elevated position, the described relations of parts and the character of the carriage mounting resulting in maximum visability of the printing point of the machine.

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US30265A 1925-05-14 1925-05-14 Typewriting machine Expired - Lifetime US1681978A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US30265A US1681978A (en) 1925-05-14 1925-05-14 Typewriting machine
GB15724/28A GB313734A (en) 1925-05-14 1928-05-29 Improvements in typewriters having type-carriages
DEE39463D DE549139C (de) 1925-05-14 1928-06-21 Typenhebelantrieb fuer Flachplattenschreibmaschinen
CH135237D CH135237A (de) 1925-05-14 1928-06-22 Flachplattenschreibmaschine mit abwärts schlagenden Typen.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US30265A US1681978A (en) 1925-05-14 1925-05-14 Typewriting machine
GB15724/28A GB313734A (en) 1925-05-14 1928-05-29 Improvements in typewriters having type-carriages
DEE39463D DE549139C (de) 1925-05-14 1928-06-21 Typenhebelantrieb fuer Flachplattenschreibmaschinen

Publications (1)

Publication Number Publication Date
US1681978A true US1681978A (en) 1928-08-28

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US30265A Expired - Lifetime US1681978A (en) 1925-05-14 1925-05-14 Typewriting machine

Country Status (3)

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US (1) US1681978A (de)
CH (1) CH135237A (de)
DE (1) DE549139C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712442A (en) * 1970-03-05 1973-01-23 J Davies Pegboard typewriter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712442A (en) * 1970-03-05 1973-01-23 J Davies Pegboard typewriter

Also Published As

Publication number Publication date
CH135237A (de) 1929-09-15
DE549139C (de) 1932-04-23

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