US3554346A - Type lever support for typewriters and similar machines - Google Patents

Type lever support for typewriters and similar machines Download PDF

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Publication number
US3554346A
US3554346A US712813A US3554346DA US3554346A US 3554346 A US3554346 A US 3554346A US 712813 A US712813 A US 712813A US 3554346D A US3554346D A US 3554346DA US 3554346 A US3554346 A US 3554346A
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US
United States
Prior art keywords
self
supporting means
type lever
lever support
springs
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
US712813A
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English (en)
Inventor
Erich Kattner
Sven Voelcker
Werner Westram
Manfred Nemeth
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of US3554346A publication Critical patent/US3554346A/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
    • B41J7/00—Type-selecting or type-actuating mechanisms
    • B41J7/02—Type-lever actuating mechanisms
    • B41J7/22—Type-baskets; Bearings or hangers for type levers

Definitions

  • the tape is suspended in the form of a uniform are by leaf springs, extend- [52] US. Cl 1 97/42 ing tangentially of the arc f the tape, and connected i the [51] 'f Cl 1 7/30 tape in laterally offset relation with respect to the body of the [50] Field of Search 197/42 tap; Guide pins extending perpendicularly to the l f Springs sus end the tape from the leaf springs.
  • the guide pins extend [56] References cued pergendicular to and outwardly of the springs and have UNITED STATES PATENTS weights movable along their outer ends between stops, to in- 77l,216 9/1904 Stickney 197/42 crease the attenuating properties of the tape.
  • Type leversupports have heretofore been rigidly. connected 5 i to. the :type lever frameand in orderto abate noise and attenu- 1 ate the recoil force o thetypelevers when returning to their support the type levers :whenin their rest positions;
  • Type. lever supports have been connected: .to the The flexible tape 3may be" made from an organic synthetic plastic material having good shock absbrbingqrialitieflpddt elasticity.
  • One form of plastic material found lobe satisfactory asan attenuating type leversupport is a fluorelastomer kn'own by the trade name of 'VlTONl A type lever" support constructed from'such a plastic material and suspended in the;
  • type lever supports have beenremedied .by utilizing a flexibletape .of elastic,'shock absorbingmaterial having poor elastic properties,.as the support for the type levers .when in their rest position and by suspending the tape in the form of auniform are, by leaf spring suspension members extending tangentially of the arc of curvature of the tape.
  • a principal'object of the present invention is to provide. a simplified and improved formpf type lever support, arranged with a view toward more efi'iciently attenuating the type levers of a typewriter and thelike when returning to their rest positions.
  • Another object of theinvention is to irnproveupon the type lever supports heretofore in use by utilizing a flexibletape of shock absorbing material havingpoor-elastic propertiesas the type lever support and bysuspending thejtape, from positions disposed above, the rest positions of the type levers in the form of a uniform arc, by leaf springs extending tangentially. of the arc of curvature of-the tape. 7 l
  • a further and importantobject of the invention is to provide a type lever support, simple in design and efficiently attenuatq ing the type levers at average speeds of up to 25 characters per second, by utilizing a. shock absorbing tape ,of pooraelastic" material suspended from its endsin the form of uniformarc from positions above. the rest positions of the type'levers, and.
  • FIG. I is a fragmentary; generally diagrammatic view' in front elevation of a type, lever support constructedqinz ac-- cordance with the principles of the'presentinvention;fand
  • FIG.- 2 is a diagrammatic shown inFlG. l.
  • the dropping backenergy'of a typelever returning to its resting position at the center of the type lever support is transmined-primarily to theflexible tape 3, which'is deflected by i the dropping back of the type lever. into a resting position.
  • the bracket members 1 are spaced beneath the tape 3 and extend angularly upwardly and outwardly in the general direction of the arc of the tape and have angularly inturned portions 12 abutted by right angled feet l2a of the leaf springs 2 and position the leaf springs to extend angularlyupwardly tangentially of the arc of the tape 3, to rigidly position the tape in the area of its suspension points in the direction of the curvature-radii, elasticallyand tangentially to the arc of curvature" of the tape;
  • washersl4 and -l5rnay be suitably'secured to the guidepiish i in any well known manner.
  • Means areprovided to limit the flexingof theleaf V i I whichareshown in FIG; 1 as being stops SQdivergingjfrtimp positesidesof the leaf springs 2 adjacent-the feet l2'ath'ereo
  • One 'stop 8 is shown astextending along the inside of tli e spring and as beingfo'rrned' from the angularlyinthrnedpo tion 12 of the bracket 1 and asturning'at generally rightangl turned portionsl2- of-the brackets-1'5"- 2, the elastic tape 3'is narrower at its
  • the guide pins 4 extend perpendicular to the leaf springs 2 and have displaceable weights 5 slidably mounted thereon. Stops 6 and 7 limit movement of the weights 5 along the pins 4.
  • the weights 5 in cooperation with the stops 8 serve to attenuate the impact force transmitted to the type lever support at 5 its ends and to degrade the impact oscillations of the leaf springs 2.
  • the type levers located at The leaf springs 2 further twist about their longitudinal axes as the type levers engage the tape and further contribute to the attenuating properties of the tape as the type levers return to their resting positions.
  • This twisting occurs principally due to the fact that the points of connection of the tape to the leaf springs are spaced laterally of the body of the tape which transmits a force to the springs to one side thereof and thereby causes a twisting movement of the springs to take place as the type levers return to their resting positions.
  • This twisting movement in addition to the deflection of the tape and the friction created as the type levers strike the tape, further lends to the degrading of the kinetic energy of the type levers.
  • the attenuation properties of the type lever support can be adjusted to the operating speed and mass of the type levers by varying the thickness of the flexible tape in accordance with the increased or decreased mass of the type levers.
  • the supports for the ends of the tape may be rigid. In such cases the tape is supported a greater distance above the range of rest of the type levers and extended farther laterally of the supports than is shown in the present disclosure.
  • said self-supporting means consisting of a self-support tape composed of a synthetic organic plastic material.
  • a type lever support in accordance with claim 4 wherein guide pins extend perpendicularly to the plane of the leaf springs and form suspension means for the self-supporting means, and wherein displaceable weights are slidably mounted on said guide pins on the outsides of the leaf spring to increase the attenuation properties of the self-supporting means and degrade the impact oscillation of the leaf springs.
  • a type lever support in accordance with claim 3 wherein guide pins extend perpendicular to the planes of said leaf springs and form a means for mounting the self-supporting means thereon in offset relation with respect to the body of said self-supporting means to effect twisting of said leaf spring inwardly towards the type lever support by engagement of the type levers with the self-supporting means when returning to their resting positions, and thereby causing a deflective movement between said self-supporting means and the type levers and creating a frictional force degrading the kinetic energy of the type levers.
  • guide pins extend through said projecting portions and leaf springs perpendicular to the planes of said leaf springs and suspend said self-supporting means from said leaf springs, and
  • leaf springs have lower end portions mounted on said frame and stops extending upwardly therealong from said lower end portions and diverging from said springs in opposite directions, to degrade the impact oscillation of said springs.

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US712813A 1967-03-30 1968-03-13 Type lever support for typewriters and similar machines Expired - Lifetime US3554346A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0109087 1967-03-30

Publications (1)

Publication Number Publication Date
US3554346A true US3554346A (en) 1971-01-12

Family

ID=7529271

Family Applications (1)

Application Number Title Priority Date Filing Date
US712813A Expired - Lifetime US3554346A (en) 1967-03-30 1968-03-13 Type lever support for typewriters and similar machines

Country Status (5)

Country Link
US (1) US3554346A (de)
BE (1) BE712939A (de)
DE (1) DE1561311B1 (de)
FR (1) FR1559967A (de)
NL (1) NL150724B (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US771216A (en) * 1902-12-16 1904-09-27 Burnham C Stickney Type-writing machine.
US886570A (en) * 1904-11-07 1908-05-05 Monarch Typewriter Co Type-writing machine.
US1011970A (en) * 1909-09-01 1911-12-19 Monarch Typewriter Co Type-writing machine.
US2605880A (en) * 1950-12-29 1952-08-05 Ibm Type bar rest
US3042176A (en) * 1961-05-17 1962-07-03 Royal Mcbee Corp Type bar support
US3280956A (en) * 1962-10-17 1966-10-25 Olympia Werke Ag Shock absorbing stop particularly for typewriters
US3368659A (en) * 1967-04-03 1968-02-13 Ncr Co Shock-absorbing typebar stop
US3384217A (en) * 1966-05-02 1968-05-21 Scm Corp Type bar rest support

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH220230A (fr) * 1940-09-02 1942-03-31 Paillard & Cie Societe Anonyme Support pour barres à caractéres, notamment pour machine à écrire.
GB716758A (en) * 1951-10-24 1954-10-13 Aug Birchmeier S Sohne Improvements in and relating to typewriters
US2903119A (en) * 1958-11-14 1959-09-08 Royal Mcbee Corp Head rests for typewriters
DE1792949U (de) * 1958-12-02 1959-08-06 Max Grundig Typenhebelruhelager fuer schreib- und aehnliche bueromaschinen.
US3162288A (en) * 1962-09-17 1964-12-22 Olivetti & Co Spa Type bar rest support

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US771216A (en) * 1902-12-16 1904-09-27 Burnham C Stickney Type-writing machine.
US886570A (en) * 1904-11-07 1908-05-05 Monarch Typewriter Co Type-writing machine.
US1011970A (en) * 1909-09-01 1911-12-19 Monarch Typewriter Co Type-writing machine.
US2605880A (en) * 1950-12-29 1952-08-05 Ibm Type bar rest
US3042176A (en) * 1961-05-17 1962-07-03 Royal Mcbee Corp Type bar support
US3280956A (en) * 1962-10-17 1966-10-25 Olympia Werke Ag Shock absorbing stop particularly for typewriters
US3384217A (en) * 1966-05-02 1968-05-21 Scm Corp Type bar rest support
US3368659A (en) * 1967-04-03 1968-02-13 Ncr Co Shock-absorbing typebar stop

Also Published As

Publication number Publication date
FR1559967A (de) 1969-03-14
NL150724B (nl) 1976-09-15
NL6803884A (de) 1968-10-01
DE1561311B1 (de) 1970-12-03
BE712939A (de) 1968-09-30

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