US2506444A - Power mechanism for typewriting machines - Google Patents

Power mechanism for typewriting machines Download PDF

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Publication number
US2506444A
US2506444A US752723A US75272347A US2506444A US 2506444 A US2506444 A US 2506444A US 752723 A US752723 A US 752723A US 75272347 A US75272347 A US 75272347A US 2506444 A US2506444 A US 2506444A
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US
United States
Prior art keywords
cam
power
power roller
lever
roller
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
US752723A
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English (en)
Inventor
Ronald D Dodge
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
Priority to NL85851D priority Critical patent/NL85851C/xx
Priority to BE482027D priority patent/BE482027A/xx
Priority to FR964983D priority patent/FR964983A/fr
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US752723A priority patent/US2506444A/en
Priority to CH277340D priority patent/CH277340A/fr
Priority to GB12492/48A priority patent/GB660263A/en
Application granted granted Critical
Publication of US2506444A publication Critical patent/US2506444A/en
Priority to DEI2203A priority patent/DE968905C/de
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
    • B41J7/92—Impact adjustment; Means to give uniformity of impression
    • B41J7/94—Character-by-character adjustment

Definitions

  • This invention relates to typewriting machines.
  • the primary object of the present invention is to provide an improved means of adjusting the blow of the typefbars imparted by the type bar operating mechanism of a power operated typewriter.
  • An object is to provide a'blowf adjusting rneans vWhich is individual 'to each type bar and which is readily accessible to the servicemen.
  • Anotherobject is ,to provide a blow adjusting means'which is simple in construction and requires a minimum ofparts.
  • Fig; 1 is a vertical section through the power mechanism of a typewriting machine embodying thepresent invention.
  • Fig. 2 is a detail- View in section showing one of the power units in operated position.
  • the numeral l ii' designates one of the lreylevers of which there is one for each'character printing type bar andwhich is pivoted ona cross rod ll suitably supported in the base I 2 of the machine.
  • Each key lever [U is provided with a finge'r b'ut ton Illa and a restoring spring i; which'u'rges the key lever it in a counterclockwise" direction (-Fig. 1).
  • the forward or right hand ends ofthe key levers I G are guided in slots 14a in .a key guide bail l4 which is adjustably .pivotally mounted in the base l2 by means of studsi, only one of which is shown in Fig. -1.
  • each key lever ID Associated with each key lever ID is a character printing type bar as which, as usual in the art, may be provided with two types lfia comprising upper and lower case characters.
  • the type bars it are supported in a-type basket which includes the usual se m l1 and e pe ba re pivoted in the segment :1 by the usual curved pivot wire IS.
  • the segment l-Tis slotted to ac commo e h ty e b r a s n e he 9s.- ment iscurved, the type bars [6 recline at the angle shown in Fig. 1 but at different levels in the machine.
  • Each type bar I6 is operated by a power unit which includes a sub-lever I9 connected by a link .to an extension I61) formed in the associated type bar 16, whereby the rocking of the sub-lever I 9 clockwise, through the link 20, actuates the .type bar l-B'in a counterclockwise direction to enga e one .or the .other of the type characters lfiofwith the work sheet on the usual platen Zl.
  • the type guide zzals snciaoiy supports a ribbon Vibrator '23which' is mounted'dn the upper end of a 11111524 pivoted at itslQtvr one to a tavern for actuating the ribbon vibrator.
  • any suitable means may be 'usear r'actuanng'the fi bqg W: r "The loweren'd of each sub-lever i9 is formed with” a d ep some [9d which coo erates withfa fulcrum strip Z6 having a" rounded nose 'Zfidand thenotch 19a is kept "seatd' on the nose'rca
  • a sprmgzi which is'agnchored tongs lower endoi the sub-lever 19 below mention I 91; a lu' g ifib in the fulcruinstripifi.
  • cain'el'eme'nt 28 pivoted at on the sub lhis cam 28 isprovide d' witha res ring spring 29' which anchored to an ar "Z8 in the c m 35 anew alug'struck 'frorn .I'S he c n is provided wi h a sa 2811 des to coopera e t he we which rotates continually in the directio th' ne (Fig. '1) While the "machine is n N mally, however, the upper end of the 281i clears the power'roller '3 0 with the Darts in the position of Fig. 1 which is tlrle flpt- .mal position.
  • cam 28 has an elongated tail piece 28c w an "ordinarily is hld'iniengagemcnt witH'a 3m in the release member 3:, ,the' spring-31s in .theposition of pig; 1 holding the tail p .6 25a against thelug" 3l a.'
  • the release ineinberflfis provided with a slot "through which'passes 1a stud tib carried by an arm forming partoffth sub-lever i l9.
  • a spring 32 connected t'oan ear to med in the release member 3
  • the power roller will actuate the cam 28 until the end of the tread 28b is reached which will occur before the type bar l6 actually strikes, and due to momentum the sub-lever l9 will be carried a little further beyond the point of disengagement of the cam 28 from the power roller 33 by the force of inertia stored in the type bar and the power unit which includes 26 are mounted edgewise on the flat under-face of a transverse frame member 33 which is secured at its ends in the base l2 and the strips 26 are spaced from each other at their left hand ends, adjacent the noses 26a by slots 33a formed in the frame member 33 which also serve to space apart the sub-levers I9, the fulcrum strips 26 being shaped at their left hand ends to the right of the nose 26a so as to project partly into the slots 33a. At their right hand ends the fulcrum strips 26 are spaced by slots formed in a comb spring plate 34 secured to the top of the frame member 33 which is formed with a longitudinal
  • the comb strip 34 has a vertical comb portion 34a spacing the fulcrum strips 26 apart and is also formed with a horizontal comb including the spring prongs or fingers 34b which are slightly bent and extend approximately horizontally directly underneath the nose portion 280 of the cam members 28, each cam member having associated with it a spring prong or finger 34b.
  • Each finger 35b is spring-biased downwardly into engagement with a screw stud 35 which may be turned by means of a screw driver to raise or lower the prongs 341) so as to bring them closer to or further away from the nose portions 280,
  • fulcrum strips 26 are clamped in their adjusted positions by nuts 35a and a clamping strip 330 having holes for the screw studs 35.
  • the fulcrum strips 26 are adjustable longitudinally and to facilitate such adjustment they are frictionally clamped in place by a channel-shaped clamping bar 36 and interposed between the edges of the fulcrum strips 26 and the bar 36 is a resilient strip 31 which may be composed of a fairly dense flexible plastic, the channel-shaped bar 38 being attached to the frame member 33 by means of clamp screws 38.
  • the power units be adjustable to vary the blow.
  • One reason is that the area of type face varies widely, as between a period type bar, representing one extreme, and an upper case M or W, representing the opposite extreme.
  • Another reason is that the type bars are on different levels and, in most commercial machines, the sub-levers must be of different lengths to avoid wide variation in angularity of the connecting links or to reach the cam slots formed in the type bars of some machines.
  • Another advantage of the means comprising the screw studs 35 and fingers 34b is that the point of disengagement may be adjusted to be very precise and the wear on the tread of member 28 at the point of disengagement is spread over a large area and notconcentrated at a very small area as is usually the case with power mechanisms of the snatchroll type.
  • the spring 29, the resiliency of the usual rubber covering of the power roller 30 and the inertia of the train of connections including the type bar assist in producing a snappy disengagement with little slippage and the element 28 is not gradually forced off the power roller.
  • Power mechanism for typewriters and the like comprising a power roller, a cam supporting member, a cam pivoted thereon and adapted for rolling engagement with the power roller, means for imparting a forward swinging movement to the cam upon its pivot to cause it to engage the power roller for rotation b the latter, means tending constantly to swing the cam in the reverse direction for restoring said cam after disengagement from the powerroller, and an element engaged by said cam in its rotation by said power roller for terminating its rolling engagement with said power roller.
  • Power mechanismfor typewriters and the like comprising a power roller, a cam lever, a segmental cam pivoted on the cam lever, keyoperated means for imparting a forward swinging mavementi. to: thelcam to.- cause. it. to engage. the powenrollier ior rotation by. said roller, means toiswing-thei cam inthe reverse-direction upon disengagement: from thepowerroller, and means engageablewith said cam during; the course of its. rotation by said power roller for disengaging saidicam from-said roller andxenablingthesecond.
  • Power. mechanism for typewriters land. the likacomprising a power: roller, a cam lever, a segmental .campivotedlon the-cam lever and.pro..-.. uid'edi witnanabutment, an actuating member adapted: to. engage said abutment and; imparta forward. swinging. movement vito the cam to. causeit to engage the roller, means.- for swinging the camv .reuersely when disengaged from the roller, and means engageable with said abutment to disengage said cam from said power roller and ren er he. reverse swinging means e fective.
  • Power mechanism for typewriters and the like comprising a power ro1 ler, a cam lever, a segmental cam pivotally mounted on said lever and provided with an abutment, a key lever, an interponentoperable by said key l v r and'p voted o thecam.
  • lever ina posi to p h agains said; abutment when the key- .lever is actuated, whereby a forward swinging movement is imparted to the cam to engage the cam with the power roller for rotation. by the latter, a spring for swinging the cam. 1161615615", and means engascazble. with said. abutment. for positively disengaging said cam from said power roller to enable said spring to restore said cam, said means being adjustable to vary the duration of rotation of the cam by said power roller.
  • a power mechanism for typewriters and other ofiice machines comprising a power roller, a rockable member, a cam element pivoted on said member and rotatable for driving engagement with said power roller, means to initially rotate said element until it is gripped by said power roller and rotated thereby, means to restore said element upon disengagement of said element from the power roller, and means engaged by said element during the course of its rotation by the power roller for disengaging said element from said power roller.
  • a power mechanism for typewriters and other office machines comprising a power roller, a pivoted member having a connection to a device to be operated; a coupling element pivotally mounted on said member and having a tread portion engageable with said power roller by an initial pivotal movement of said element on said member, said coupling element having a release portion; means to impart said initial pivotal movement to said element, and means engaged by said release portion during the course of rotation of said element by the power roller for posi-- tively releasing said tread portion from said roller.
  • a power roller In a power mechanism for typewriters and the like, a power roller; a power unit including a member rotatably engageable with said power roller for driving engagement with the latter and means to restore said member after disengagement from said roller, means for imparting an initial rotational movement to said member to engage it with the power roller, and. adjustable means for limiting rotation of said member by the power roller and at the same time rendering the restoring means eiiective.
  • a power mechanism for typewriters and the like comprising, a power roller; a power unit having an element rotatably engageable with the power rollen and a; rockable. support. for said elea. merit, said. element. normally having a .cleara .c&. with respect. tothe said powenrol'ler,saidsuppopt. having afulcrum notch; afulcr-um elementhaue; ing a fulcrum nose seated in said notch, aspring. for restoring said rockable support and holding. said notch in cooperation with said nose and meansto adjustably movably mount the fulcnnnt element to enableadjustment ofsaid clearance.
  • a power mechanism for typewriters and the like comprising-a power roller; apower unit; having an element rotatablyengageablewithgthe power rolleranda. rockable support for said. 81.6.1... ment, said support having afulcrum portioninfulcrum bar having-"pivotal engagement with. the fulcrum portion, a spring for holding said ,-f*u1. crum --portion in pivotal engagement withthe, fulcnum bar, and means to adiustably slidablst mount said fulcrum bar.
  • a power mechanism comprising. a power roller, va rockable. support having an operating: connection to a part to be operated, a coupling; element pivoted .on said support for rotating: engagement with the power roller, a key having a projection, and an interponent pivotally and slidably mounted on said support between. said; keyprojection and said .couplingelement anddise, posed so that when the key: is depressed theinterponent is roclged on its pivot to rock said ecu; piing. element into engagement with the powee roller and, when said hey lsheldin operated cone. dition, said interponent will be caught by the key lug during restoration of the rockable support and be prevented from moving between said lug and said coupling element.
  • a power mechanism for typewriters and the like comprising a power roller, a cam unit having a cam rotatable by the power roller and means to initially engage the cam with said roller, means to compel disengagement of the cam from said roller at a predetermined point in the oper ating cycle of the cam unit, and means to vary the point at which the last named means disengages said cam from said roller.
  • a power mechanism for typewriters and like machines comprising a main power roller; power units operable by the power roller, each power unit including a coupling element initially rotatively engageable with the power roller for rotation by the latter and including a support rocked by said rotation of the coupling element; a support frame having a series of guide slots, one for each support; a series of fulcrum bars, one for each support.
  • a spring guide comb having a series of slots in alignment with the first named slots for holding said bars in edgewise spaced relation on said support frame and also having a series of prongs in the plane of said coupling elements and operative to disengage said elements from said power roller at various points in the operating cycles of said power units, clamping means for adjustably securing said bars in said slots including screws for adjusting said prongs, and selectively operable means for initially rotating said coupling elements to engage the latter with the power roller.
  • a power operated typewriter having a power roller; a series of power devices operable by the power roller, each power device including a rockable member; a frame, a series of fulcrum members, each having a fulcrum bearing on one of said rockable members; means for mounting said fulcrum members on said frame for individual adjustment of the fulcrum point of each rockable member, and springs individual to said rockable members for maintaining bearing contact between said fulcrum members and said rockable members.
  • a power mechanism for the type bar of a typewriting machine comprising a power roller; a rock lever having an operating connection to the type bar; an L-shaped cam pivoted on said lever intermediate the ends of said lever and intermediate the ends of one bar of the L, the other bar having a tread portion engageable with the-power roller for partial rotation by the latter, said tread portion being eccentric to the pivot of said cam on said lever whereby to rock said lever and actuate the type bar when the cam is rotated by the power roller, said cam normally having a clearance with the power roller closed by a small initial rotation of the cam to engage the tread portion with the power roller; a fulcrum member having a loose contact pivotal engagement with a portion of said rock lever, a spring for maintaining said pivotal engagement and restoring said lever, means to adjustably movably mount the fulcrum member for adjustment of said pivot, and means to effect said initial rotation.
  • a power mechanism for the type bar of a typewriting machine comprising a power roller; a rock lever having an operating connection to the type bar; an L-shaped cam pivoted on said lever intermediate the ends of said lever and intermediate the ends of one bar of the L, the other bar having a tread portion engageable with the power roller for partial rotation by the latter, said tread portion being eccentric to the pivot of said cam on said lever whereby to rock said lever and actuate the type bar when the cam is rotated by the power roller, said cam normally having a clearance with the power roller closed by a small initial rotation of the cam to engage the tread portion with the power roller; means engageable with the free end of the bar of the L which is pivoted to said lever for disengaging the cam from the power roller, and means for effecting said initial rotation.

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  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Handling Of Cut Paper (AREA)
US752723A 1947-06-05 1947-06-05 Power mechanism for typewriting machines Expired - Lifetime US2506444A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL85851D NL85851C (en(2012)) 1947-06-05
BE482027D BE482027A (en(2012)) 1947-06-05
FR964983D FR964983A (en(2012)) 1947-06-05
US752723A US2506444A (en) 1947-06-05 1947-06-05 Power mechanism for typewriting machines
CH277340D CH277340A (fr) 1947-06-05 1948-04-15 Dispositif d'actionnement pour une machine de bureau.
GB12492/48A GB660263A (en) 1947-06-05 1948-05-06 Improvements in or relating to power mechanism for typewriters and like machines
DEI2203A DE968905C (de) 1947-06-05 1950-09-29 Typenhebelbewegungsvorrichtung fuer Schreibwerke von Geschaeftsmaschinen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US752723A US2506444A (en) 1947-06-05 1947-06-05 Power mechanism for typewriting machines

Publications (1)

Publication Number Publication Date
US2506444A true US2506444A (en) 1950-05-02

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Application Number Title Priority Date Filing Date
US752723A Expired - Lifetime US2506444A (en) 1947-06-05 1947-06-05 Power mechanism for typewriting machines

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US (1) US2506444A (en(2012))
BE (1) BE482027A (en(2012))
CH (1) CH277340A (en(2012))
DE (1) DE968905C (en(2012))
FR (1) FR964983A (en(2012))
GB (1) GB660263A (en(2012))
NL (1) NL85851C (en(2012))

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675109A (en) * 1951-11-15 1954-04-13 Underwood Corp Power-operated typewriting and like machines
US2742131A (en) * 1952-05-05 1956-04-17 Dimar Soc Typewriting device
DE1023471B (de) * 1953-09-08 1958-01-30 Ibm Deutschland Vorrichtung zum Einstellen der Anschlagstaerke von Typenhebeln an Schreib- und aehnlichen Maschinen
US2830688A (en) * 1953-06-01 1958-04-15 L C Smith & Corona Typewriters Power actuated typing mechanism for business machines
DE969022C (de) * 1951-12-17 1958-05-08 Ibm Deutschland Vorrichtung an einer tastengesteuerten Nockeneinrichtung fuer den Kraftantrieb eines Schreibmaschinentypenhebels
US2900062A (en) * 1956-04-14 1959-08-18 Adlerwerke Kleyer Ag H Device for adjusting the stroke force of the type bars in power-driven typewriters, bookkeeping machines and the like
DE1063614B (de) * 1956-05-15 1959-08-20 Ibm Deutschland Typenhebelgetriebe fuer kraftangetriebene Schreibmaschinen
US3232405A (en) * 1963-06-26 1966-02-01 Ibm Typewriter escapement mechanism with spacing means
US3237746A (en) * 1961-07-06 1966-03-01 Alpina Buromaschinen Werk G M Typewriter drive cam having rounded engaging surface
DE1229111B (de) * 1961-07-06 1966-11-24 Mecanographe Japy Sa Soc D Vorrichtung zum Einstellen der Typenanschlagstaerke bei Typenhebelgetrieben fuer Bueroschreibmaschinen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1073006B (de) * 1954-10-20 1960-01-14 IBM Deutschland Internationale Büro-Maschinen Gesellschaft m.b.H., Sindelfingen (Württ.) Typenhebelantriebsvorrichtung für kraftangetriebene Schreibmaschinen
DE1056625B (de) * 1956-02-02 1959-05-06 Olympia Werke Ag Typenhebelgetriebe fuer motorisch angetriebene Schreibmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT102337B (de) * 1924-11-07 1926-01-11 Franz Knotz Schreibmaschine mit Motorantrieb.
US1602757A (en) * 1924-09-26 1926-10-12 North East Appliances Inc Power mechanism
US1614475A (en) * 1924-08-18 1927-01-18 Woodstock Typewriter Co Power-actuated typewriter
US1661710A (en) * 1925-01-05 1928-03-06 North East Appliances Inc Power mechanism
GB552797A (en) * 1941-03-08 1943-04-23 Franz Zwonicek Improvements in or relating to devices for operating the type bars of a typewriter

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE486354C (en(2012)) *
DE406623C (de) * 1924-11-29 Mercedes Buero Maschinen Und W Einstellvorrichtung fuer die Anschlagstaerke von Typenhebeln an Schreibmaschinen mitKraftantrieb
DE432120C (de) * 1926-07-27 Mercedes Buero Maschinen Fa Vorrichtung zur Einstellung der Anschlagstaerke der Typenhebel von Schreibmaschinen mit Kraftantrieb
DE280095C (en(2012)) *
DE293257C (en(2012)) * 1913-10-18
DE406088C (de) * 1922-07-20 1924-11-17 Mercedes Buero Maschinen Und W Vorrichtung zum Bewegen der Typenhebel von Schreibmaschinen durch Motorantrieb
DE432121C (de) * 1923-12-08 1926-07-31 Mercedes Buero Maschinen Fa Vorrichtung zur Einstellung der Anschlagstaerke der Typenhebel von Schreibmaschinen mit Kraftantrieb
DE612338C (de) * 1934-02-28 1935-04-18 Triumph Werke Nuernberg Akt Ge Vorrichtung zum Regeln der Spannung der Tastenhebelfedern an Schreibmaschinen
US2344167A (en) * 1941-12-26 1944-03-14 Underwood Elliott Fisher Co Typewriting machine
US2362229A (en) * 1942-12-31 1944-11-07 Underwood Elliott Fisher Co Typewriting machine
US2407195A (en) * 1944-02-17 1946-09-03 Ibm Typewriting machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1614475A (en) * 1924-08-18 1927-01-18 Woodstock Typewriter Co Power-actuated typewriter
US1602757A (en) * 1924-09-26 1926-10-12 North East Appliances Inc Power mechanism
AT102337B (de) * 1924-11-07 1926-01-11 Franz Knotz Schreibmaschine mit Motorantrieb.
US1661710A (en) * 1925-01-05 1928-03-06 North East Appliances Inc Power mechanism
GB552797A (en) * 1941-03-08 1943-04-23 Franz Zwonicek Improvements in or relating to devices for operating the type bars of a typewriter

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675109A (en) * 1951-11-15 1954-04-13 Underwood Corp Power-operated typewriting and like machines
DE969022C (de) * 1951-12-17 1958-05-08 Ibm Deutschland Vorrichtung an einer tastengesteuerten Nockeneinrichtung fuer den Kraftantrieb eines Schreibmaschinentypenhebels
US2742131A (en) * 1952-05-05 1956-04-17 Dimar Soc Typewriting device
US2830688A (en) * 1953-06-01 1958-04-15 L C Smith & Corona Typewriters Power actuated typing mechanism for business machines
DE1023471B (de) * 1953-09-08 1958-01-30 Ibm Deutschland Vorrichtung zum Einstellen der Anschlagstaerke von Typenhebeln an Schreib- und aehnlichen Maschinen
US2900062A (en) * 1956-04-14 1959-08-18 Adlerwerke Kleyer Ag H Device for adjusting the stroke force of the type bars in power-driven typewriters, bookkeeping machines and the like
DE1063614B (de) * 1956-05-15 1959-08-20 Ibm Deutschland Typenhebelgetriebe fuer kraftangetriebene Schreibmaschinen
US3237746A (en) * 1961-07-06 1966-03-01 Alpina Buromaschinen Werk G M Typewriter drive cam having rounded engaging surface
DE1229111B (de) * 1961-07-06 1966-11-24 Mecanographe Japy Sa Soc D Vorrichtung zum Einstellen der Typenanschlagstaerke bei Typenhebelgetrieben fuer Bueroschreibmaschinen
US3232405A (en) * 1963-06-26 1966-02-01 Ibm Typewriter escapement mechanism with spacing means

Also Published As

Publication number Publication date
GB660263A (en) 1951-11-07
CH277340A (fr) 1951-08-31
BE482027A (en(2012))
NL85851C (en(2012))
DE968905C (de) 1958-04-17
FR964983A (en(2012)) 1950-08-30

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