US2611469A - Type action system for typewriters - Google Patents

Type action system for typewriters Download PDF

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Publication number
US2611469A
US2611469A US6166A US616648A US2611469A US 2611469 A US2611469 A US 2611469A US 6166 A US6166 A US 6166A US 616648 A US616648 A US 616648A US 2611469 A US2611469 A US 2611469A
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US
United States
Prior art keywords
key
type
lever
levers
plane
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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US6166A
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English (en)
Inventor
Haas Otto
Schaedler Tony
Schneider Leon
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RENOR ANSTALT
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RENOR ANSTALT
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Publication date
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Publication of US2611469A publication Critical patent/US2611469A/en
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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
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/36—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for portability, i.e. hand-held printers or laptop printers

Definitions

  • the rate of bending or angular deflection so depends upon the slope of thesegment, the position of the type-lever bearing-slots, and upon the associated plane 'of swing of the key-lever that the outswinging ends of the latter move in the plane of their respective type-lever bearingslots.
  • a still further object of our invention is to substantially simplify the paper ieedby pressing the paper guicleon which an engaging roller and a. paper guiding roller areimounted -uni versally movably onto'the platen by means of a spring which in the medianplane and intermediate of the said cylinders engages the said guide.
  • the latter is pivoted ontwo slides whichare disposed slidably on the sidewalls'of thecarriage,
  • a pedestal 2 which is securedtot tom plate 3.
  • the latter at the same tim iorms Fig. 2 is a vertical cross-section, v i
  • Fig. 3 is a schematical top plan viewof the type action
  • Fig. 4 is a side View of Fig. 3'
  • v Fig. 5 is a vertical section on line Y' V of i Fig. 6 is a perspective view of, the escapeinent mechanism of the spacing-mechanism, including the rocker, theink ribbon mechanism and'the ribbon vibrator, as seen from the paper carriage,
  • Fig. '7 is an elevation of the 'paper 'feed ing I guiding arrangement
  • I Figs. 8-10 each show an end viewbfFiglfi in three difierentpositions
  • J I v N i Fig. 11 shows a system of spatial'co-ordiii es, including planes of reference, and,
  • Fig. 12 illustrates schematicallyt testing
  • the key-leversfi are'supfported, with a V-notch-each, in open slot-bear h botthe machine irame, and tension springs 'j'fi pull the ,key levers l downward against their bear ings.
  • Each key-lever I' isarticulated'to a typelever ,fi-through a wire link 5.
  • the type-levers ii are guided inslots of the inclined stationary, segment 1, as well known, and borne for rotation on a wire axle 8.
  • the type-levers--froni the centre of thesegment toward both sides-are.made1of gradually increasing length, and thewiret correspondingly so curved that all'the' type- -levers strike from their position of. rest. upward against a point situated in close proximity, of the central guide 9.
  • the type-lever axle 8 is inserted into the bearing-groove provided on the underside of segment i, through the bores in the endportioris keyboard, upon the inclination of the shanks of the key-levers I relative :to the vertical median plane of the machine (such inclinationis'illustrated in Fig.
  • Such inclination and bend allow the inner ends of the key-levers (which serve for actuating the type-levers) to swing inf thepl'anes of throw of their appurtenant type-leversl
  • the different angles of bend of the keyf-leversjthus depend upon the inclinatio-n offthe type lever bearing structure or, segment" 'l;' the pcsiti'onof the plane of the type-lever beari lot an the individual appurtenant position of the plane of swing of the key-levers in such degree that the swinging key-lever inner ends move in the planes of their respective type-lever bearing-slots.
  • the key-lever inner ends (which are gradually bent oif in plan from the centre of the machine toward the two sides) also have to be gradually bent up in elevation in the direction from the centre of the machine toward the two sides in accord with the guiding-slots in the segment I.
  • the length of the bent-oil inner ends of the key-levers has to be gradually increased in the said direction.
  • All the points of support of the key-levers l are situated in a horizontal plane (see Figs. 2 and 5), the position of which depends upon the slope of segment I. The same holds true for the points of bend of the key-levers As seen from Figs.
  • a bridge H is secured to the bottom plate 3 of the machine and supports the inclined segment I as well as an axle pin H on which the escapement ratchet wheel
  • the rocket I5 is pivoted on the pointed screws Hi to the side lugs of the bridge H, and is held in a predetermined position by means of a spring (Fig. 6).
  • the universal bar I is guided, in a manner known, by
  • the said universal bar II by means of a pin l0 on each side, is pivoted in two side lugs of the rocker so that he latter, by the action of a type-lever 6 on the universal bar I0, is rocked, thereby bringing the pawl H, which is fixed to rocker l5, into engagement with the escasement h el.
  • a toothed rack (only shown in Figs. 1 and 2), secured to the paper carriage, is engaged by the pinion
  • the pinion I2 Owing to the cooperation of the movable pawl 22which is biased by the spring 2
  • the rocker l5 is provided with two outrigger-arms 23, on theends of which movable pawls 25 are mounted.
  • the latter are each biased by a spring 24, and co-act with an inkribbon feeding-wheel 26.
  • the pawls 25 may be thrown into and out of engagement, in a manner known per se, during operation of the typewriter by virtue of a reversal through the ink-ribbon tension.
  • the ink-ribbon israised by means of the fork 21 which guides the ink-ribbon past the central type-guide 9.
  • the fork 21 is pivoted on a pin 31' to .the lower portion 28 (Fig. 2) of the carriage, and is biased by a spring 29 (Fig. 6)
  • a spring 29 Fig. 6
  • the spacing-key strap 30 is actuated from outside the keyboard, the said strap being pivoted at 3
  • the two linkages 32 which are articulated to the outer ends of the outswinging arms of the said strap 30, are each connected to a bell-crank 33, which latter is engaged in a longitudinal slot of the said pawl 25 through a nose and is fulcrumed in a slot of the ribbon-spool axle 34.
  • the bell-crank 33 When the spacing-key strap 30 is actuated, the bell-crank 33 first is drawn outwardly in its bearing slot by the linkage 32, the pawl 25 (which is subjected to a slight spring tension) being disengaged from the wheel 26. The bell-crank 33 then is rocked on the axle pin 34, entraining the pawl 25 which further actuates the rocker l5 and thus releases the spacing-mechanism without actuating the ink-ribbon feed.
  • a pressure or engaging-roller 42 and a plurality of paper guide-rollers 43 are pivoted to the paper guide apron'4
  • An axle pin 45 is borne for rotation in lateral lugs 44 of apron 4
  • the said slots 46 are disposed radially with respect to the axle 49 of the platen 50 so that the pin 45 is movable toward and away from the latter.
  • the axle pin 45 further, is mounted on each end in a slide 5
  • are each guided on a bearingbush 53 by means of a slot 52, which bush is pressed into the sidewall 41.
  • thus are guided and displaceable on the bushes 53 along the sidewalls 41 of the upper carriage 48.
  • a spring 54 which at one end is secured to carriage 48, engages the axle pin 45 in the middle thereof,
  • is universally movable about the point of engagement of spring 54 so that the rollers 42, 43 over their entire lengths are. pressed against the platen 50 under uniform pressure.
  • a paper-clamping strap 55 which portions are formed as levers and interconnected by a cross bar, are rotatably mounted on the sidewalls 48 of the upper carriage, and each is provided with a downwardly projecting dog 55 for the purpose ,of co-acting with the slides 5
  • the lever 55 When the lever 55 is swung upward from the position shown in Fig. 8 into that of Fig. 9, the introduced sheet of writing paper is only slipped underneath. The paper sheet or sheets are introduced between the guide apron 4
  • the strap 55 then is fully depressed so as to firmly clamp the sheet or sheets to the platen 5
  • one of the latter is slightly raised from the position shown in Fig. 8 into that of Fig. 9, whereupon the said sheet or sheets are properly positioned, if required, and the lever 5 again depressed into the position shown in Fig. 8.
  • the dog 56 does not yet operatively engage the slide 5
  • the plane of segment 1, i. e, o is inclined at the angle a with respect to the base plane 1r1.
  • a right-hand system of coordinates X', Y, Z is set up in the plane 0', wherein the positive X-axis is so aligned that it points to the left for' the operator, and the positive Y-axis passes through base plane 111 at point D1 and coincides with the line of intersection of a plane of symmetry m which is parallel to the plane of elevation 12, and the plane a.
  • the fulcra of the type-levers are situated in segment-plane 0'; when connecting these points by a line, we obtain a curve, the pivotal axis of the type-levers.
  • Such latter axis is related to the system of axes X, Y in a with the origin in (Fig. 11), and the following analytical ex pression is obtained therefor:
  • the said pivotal axis in 0' also comprises two curve-branches which are situated symmetrical to the ordinate-axis Y.
  • Each type-lever has an extension reaching beyond its fulcrum. Such extension is pivoted at its end, as a crank of the size 1', on a link of length l. The end of each linkis articulated to the respective key-lever which is fulcrumed. When the key is depressed, the segment I is intersected by the type-lever in a normal plane, and each coupling point is situated in the respective plane which in o" is normal to the said pivotal axis of the type-levers.
  • the said straight line (19) includes the following angle with the plane of the segment zu I z/,, (20) whereby the values entering into Equation 20 are to be taken from the Equations 11b, 13, 17b and 180.
  • the letter Z denotes the length of the latter in the Equations 21.
  • the length cut off the ordinate-axis Y by the normal ni, is designated by mi.
  • a typewriter comprising a plurality of type-levers, an inclined segment block having slots for guiding the type-levers, a plurality of key-levers arranged in four rows and each having an arm carrying a key and an outswinging arm, a plurality of links for directly connecting each outswinging arm of.
  • a key-lever without intermediate lever to the respective type-lever and bearing means providing a guide slot and a fulcrum for each key lever, the fulcra being arranged in four parallel rows and situated in a common horizontal plane, and the guide slots being tilted with respect to the vertical plane, the angle of inclination of successive slots gradually increasing from the center towards both sides of the typewriter whereby successive key-levers are caused to swing in planes of gradually increased inclination towards the sides of the typewriter, the outswinging key-lever arms being bent off at a gradually increasing rate in the direction of the type-lever guiding slots from the center of the typewriter toward the two sides thereof, the different angles of bend of the outswinging key-lever arms depending on the inclination of the said segment block, the position of the respective planes of the said type-lever guiding slots, and the position of the respective planes of swing of the appurtenant key-levers, such that the ends of the outswinging key-lever arms move in the respective planes of the
  • a typewriter comprising a plurality of typelevers, an inclined segment block having slots for guiding the type-levers, a plurality of keylevers arranged in four rows and each having an arm carrying a key and an outswinging arm, a plurality of links for directly connecting each outswinging arm of a key-lever without intermediate lever to the respective type lever, the said type-levers from the center of the typewriter toward the two sides being of increasing length, a wire arranged.

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US6166A 1947-02-04 1948-02-04 Type action system for typewriters Expired - Lifetime US2611469A (en)

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CH2611469X 1947-02-04

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US (1) US2611469A (enrdf_load_stackoverflow)
BE (1) BE480090A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4715734A (en) * 1983-11-05 1987-12-29 Ta Triumph-Adler Aktiengesellschaft Platen adjusting mechanism

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US626915A (en) * 1899-06-13 Type-writer
US924460A (en) * 1907-08-20 1909-06-08 Royal Typewriter Co Inc Writing-machine.
US1065842A (en) * 1903-02-11 1913-06-24 Standard Typewriter Company Type-writer.
US1738677A (en) * 1926-06-08 1929-12-10 Albert Voight Typewriting machine
US1841104A (en) * 1925-04-24 1932-01-12 Victor Adding Machine Co Typewriting machine
US2018058A (en) * 1930-02-10 1935-10-22 Firm Torpedo Werke Ag Fahrrade Typewriter
US2059574A (en) * 1933-08-29 1936-11-03 Firm A G Vorm Seidel & Naumann Key lever mounting for typewriting machines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US626915A (en) * 1899-06-13 Type-writer
US1065842A (en) * 1903-02-11 1913-06-24 Standard Typewriter Company Type-writer.
US924460A (en) * 1907-08-20 1909-06-08 Royal Typewriter Co Inc Writing-machine.
US1841104A (en) * 1925-04-24 1932-01-12 Victor Adding Machine Co Typewriting machine
US1738677A (en) * 1926-06-08 1929-12-10 Albert Voight Typewriting machine
US2018058A (en) * 1930-02-10 1935-10-22 Firm Torpedo Werke Ag Fahrrade Typewriter
US2059574A (en) * 1933-08-29 1936-11-03 Firm A G Vorm Seidel & Naumann Key lever mounting for typewriting machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4715734A (en) * 1983-11-05 1987-12-29 Ta Triumph-Adler Aktiengesellschaft Platen adjusting mechanism

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