US3368659A - Shock-absorbing typebar stop - Google Patents

Shock-absorbing typebar stop Download PDF

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Publication number
US3368659A
US3368659A US628092A US62809267A US3368659A US 3368659 A US3368659 A US 3368659A US 628092 A US628092 A US 628092A US 62809267 A US62809267 A US 62809267A US 3368659 A US3368659 A US 3368659A
Authority
US
United States
Prior art keywords
stop
shock
absorbing
typewriter
levers
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
US628092A
Other languages
English (en)
Inventor
Erle R Mumpower
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.)
NCR Voyix Corp
National Cash Register Co
Original Assignee
NCR 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
Application filed by NCR Corp filed Critical NCR Corp
Priority to US628092A priority Critical patent/US3368659A/en
Priority to DEN21039U priority patent/DE1984628U/de
Priority to GB3496/68A priority patent/GB1153965A/en
Application granted granted Critical
Publication of US3368659A publication Critical patent/US3368659A/en
Priority to FR1573086D priority patent/FR1573086A/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
    • B41J7/30—Preventing rebound or clash of levers or type members

Definitions

  • the stop includes an arcuately-shaped member which is yieldably supported near each end on springloaded pins for movement towards a similarly-shaped support member.
  • Each lever upon returning to a home position after printing, strikes an elastomer strip secured to the movable member and moves it towards the support member to thereby prevent rebound of the lever and minimize the noise of impact.
  • This invention relates to a shock-absorbing stop, and, more particularly, it relates to a shock-absorbing stop which is especially adaptable for use with typewriter levers to prevent the rebounding thereof when the levers return to a home position after hitting the platen of the typewriter or similar machine in which the stop is used.
  • the shock-absorbing stop of this invention quickly absorbs the impact energy of typewriter levers returning to a home position after striking the platen of the typewriter in which the stop is used.
  • Said stop is inexpensive to produce and has sufficient flexibility and responsiveness to be effective even when used with light-weight typewriter levers which are operated at high speeds.
  • the shock-absorbing stop of this invention includes a .first elongated member, which has end portions adapted to be secured to a support in a typewriter or other similar printing machine with which said stop may be used.
  • the stop also includes a second elongated member, having first and second opposed sides thereon with a strip of resilient material secured to said first side.
  • the stop also includes resilient means secured to said second side for yieldably maintaining said second member in spaced relation with said first member, whereby at least a portion of said second member is moved towards said first member when one of said typewriter levers impacts against said strip in returning to said home position after striking the platen in the machine in which the stop is used.
  • FIG. 1 is a side view in elevation of the shock-absorbmg stop of this invention as used in a typewriter.
  • FIG. 1 shows the shock-absorbing stop 10 of this invention as used in a typewriter.
  • the levers 12, 14, 16, and 18 are connecting levers used to actuate the typewriter levers 20 to move them individually to strike the platen 22. Because said connecting levers are conventional and do not form a part of this invention, they are shown only generally, so as to orient the stop 10 within the structure of a typewriter.
  • the levers 20 are shown in the home position, resting on the resilient strip 24 of the stop 10. After each individual lever 20 is actuated to strike the platen 22, it rebounds therefrom to impact against the stop 10, which is adaptable to quickly absorb the kinetic energy of the impacting lever 20.
  • the construction of the shock-absorbing stop 10 is best shown in FIG. 2.
  • the stop 10 includes a first, generally arcuately-shaped, elongated member 26, having end portions 28 adapted to be secured to a support 30 (FIG. 1) by fasteners 32.
  • a second, generally-arcuately-shaped, elongated member 34 Positioned adjacent to said first member 26 is a second, generally-arcuately-shaped, elongated member 34, which has the resilient strip 24 secured to one side thereof by conventional adhesives.
  • the strip-24 is made of elastomeric material, such as vinyl chloride, and, in the embodiment shown, was approximately inch thick.
  • the second elongated member 34 is yieldably held in spaced relation to the first elongated member 26 by the following construction.
  • Each end of the elongated member 34 is secured to the elongated member 26 by a resilient means 36, having the arrangement shown in FIG. 4, which includes a stud or pin 38 projecting from one side of said member 34.
  • the stud 38 extends through a slot 40 in the first elongated member 26, and a compression-type spring 42 is mounted on the stud between the members 34 and 26, suitable washers 44 being positioned on the stud on opposite sides of the slot 40 in the member 26, as shown.
  • a second compression-type spring 46 producing slightly less compression than the spring 42, is also mounted on the stud 38 between one of the washers 44 and a washer 45, a retaining C-shaped clip 48 being used to retain the spring 46 on the free end of the stud 38.
  • the area near each end of the second elongated member 34 is provided with a resilient means 36, which may act as a pivot point for the opposite end of said member 34 when a typewriter lever 20 strikes said opposite end.
  • a third stud 52 which projects from the second member 34 (FIGS. 2 and 3) and passes through an opening 50 in the'first member 26; both sides of the opening 50 are countersunk.
  • the operation of the stop 10 is as follows.
  • an object such as a typewriter lever 20
  • strikes the resilient strip 24 near one of the resilient means 36 (the one shown in the left side of FIG. 2, for example)
  • its spring 42 is compressed somewhat against its bias
  • the second member 34 is resiliently moved towards the first member 26, thereby absorbing some of the kinetic energy of the impacting lever 20.
  • Some of said energy is also absorbed by the resilient strip 24, which deadens some of the noise of impact.
  • the left end of the member 34 (as viewed in FIG. 2) moves toward the member 26, the right end of the member 34 is moved slightly away from the member 26 due to a slight pivoting of the member 34 about the stud 52, which is located approximately in the center of the length of the member 26.
  • the particular size of the springs 42 and 46 and the other elements in the stop are determined by the particular application in which the stop is used.
  • the particular stop 10 shown herein is responsive enough to be used with typewriter levers 20, which are considered lightweight in the art.
  • a shock-absorbing stop adapted to be secured to a support and comprising:
  • a first elongated, arcuately-shaped member having end portions adapted to be secured to said support;
  • a second elongated, arcuately-shaped member having first and second opposed sides thereon, and first and second opposed ends;
  • said first member having slots therein to receive said studs, with each said stud being of sufficient length to provide a section which extends through and beyond its pertaining said slot;
  • fastener means to secure said second springs on the free ends of said sections and to subject all said springs to a slight compression
  • slots being of sufiicient size to enable one end of said second member to move towards said first member against the bias of at least said first springs when an object impacts said strip near said one end while said second member is pivoted about a point near its opposite end.

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  • Accessory Devices And Overall Control Thereof (AREA)
  • Automatic Assembly (AREA)
  • Holders For Sensitive Materials And Originals (AREA)
US628092A 1967-04-03 1967-04-03 Shock-absorbing typebar stop Expired - Lifetime US3368659A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US628092A US3368659A (en) 1967-04-03 1967-04-03 Shock-absorbing typebar stop
DEN21039U DE1984628U (de) 1967-04-03 1968-01-09 Rueckpralldaempfungsvorrichtung fuer typenhebel.
GB3496/68A GB1153965A (en) 1967-04-03 1968-01-23 A Shock-Absorbing Device For Typewriter Levers
FR1573086D FR1573086A (Direct) 1967-04-03 1968-03-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US628092A US3368659A (en) 1967-04-03 1967-04-03 Shock-absorbing typebar stop

Publications (1)

Publication Number Publication Date
US3368659A true US3368659A (en) 1968-02-13

Family

ID=24517431

Family Applications (1)

Application Number Title Priority Date Filing Date
US628092A Expired - Lifetime US3368659A (en) 1967-04-03 1967-04-03 Shock-absorbing typebar stop

Country Status (4)

Country Link
US (1) US3368659A (Direct)
DE (1) DE1984628U (Direct)
FR (1) FR1573086A (Direct)
GB (1) GB1153965A (Direct)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3554346A (en) * 1967-03-30 1971-01-12 Siemens Ag Type lever support for typewriters and similar machines
US3949852A (en) * 1974-07-31 1976-04-13 Scm Corporation Typebar support
US4350456A (en) * 1978-01-12 1982-09-21 Canon Kabushiki Kaisha Printer provided with a margin setting mechanism

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US884347A (en) * 1900-09-26 1908-04-07 Yetman Typewriter Transmitter Company Type-writing machine.
US886570A (en) * 1904-11-07 1908-05-05 Monarch Typewriter Co Type-writing machine.
US2043393A (en) * 1930-01-25 1936-06-09 Burroughs Adding Machine Co Power operated typewriter
US2176123A (en) * 1935-10-01 1939-10-17 Denzer Ludwig Type lever pad attachment for typewriting machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US884347A (en) * 1900-09-26 1908-04-07 Yetman Typewriter Transmitter Company Type-writing machine.
US886570A (en) * 1904-11-07 1908-05-05 Monarch Typewriter Co Type-writing machine.
US2043393A (en) * 1930-01-25 1936-06-09 Burroughs Adding Machine Co Power operated typewriter
US2176123A (en) * 1935-10-01 1939-10-17 Denzer Ludwig Type lever pad attachment for typewriting machines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3554346A (en) * 1967-03-30 1971-01-12 Siemens Ag Type lever support for typewriters and similar machines
US3949852A (en) * 1974-07-31 1976-04-13 Scm Corporation Typebar support
US4350456A (en) * 1978-01-12 1982-09-21 Canon Kabushiki Kaisha Printer provided with a margin setting mechanism

Also Published As

Publication number Publication date
GB1153965A (en) 1969-06-04
FR1573086A (Direct) 1969-07-04
DE1984628U (de) 1968-05-02

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