US1471153A - Typewriting machine - Google Patents

Typewriting machine Download PDF

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Publication number
US1471153A
US1471153A US453983A US45398321A US1471153A US 1471153 A US1471153 A US 1471153A US 453983 A US453983 A US 453983A US 45398321 A US45398321 A US 45398321A US 1471153 A US1471153 A US 1471153A
Authority
US
United States
Prior art keywords
type
type bar
bar
lever
key 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
US453983A
Other languages
English (en)
Inventor
Going George Gould
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.)
NOISELESS TYPEWRITER Co I
NOISELESS TYPEWRITER COMPANY Inc
Original Assignee
NOISELESS TYPEWRITER Co I
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 NOISELESS TYPEWRITER Co I filed Critical NOISELESS TYPEWRITER Co I
Priority to US453983A priority Critical patent/US1471153A/en
Priority to GB29047/21A priority patent/GB189324A/en
Priority to NL20930A priority patent/NL12239C/xx
Priority to FR543828D priority patent/FR543828A/fr
Priority to DEN20560D priority patent/DE411804C/de
Application granted granted Critical
Publication of US1471153A publication Critical patent/US1471153A/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

Definitions

  • This invention relates to typewriting machines and more particularly to an improved type action comprising a swinging type bar and depressible key lever and connecting and associated parts to effect printing.
  • Another object is to provide an improved type action for small and readily port-able machines wherein the parts are capable of relatively cheap manufacture and assembly and which possesses features of structural superiority and functional advantage.
  • Figure 1 represents a side view of the improved type action -.withthe supporting parts in section and certain of the associated parts in full lines;
  • Figure 2 is a similar view of the type action in the position corresponding to the depressed position of the key lever.
  • Fig. 3 is a similar View of the type action in printing position.
  • the type writing machine includes a base frame 1, having a carriage 2 mounted to travel transversely across the rear part and provided with a platen 3 about which the paper is rolled and which acts as a backing as the type character are impressed thereagainst.
  • the type action includes a depressible key lever 4, pivotally mounted at its rear end 5 and guided vertically at its fore end in a slotted bar 6, and a type bar 7 pivotally mounted intermediate its end but adjacent its lower end at 8 and carrying at its upper or free swinging end the type character head 9.
  • the key lever is connected to the type bar by a link 10 of inverted U-shape, pivotally supported at 11 on an upstanding plate 12 and provided with an off set 15 at its other end disposed below and normally held against the lower edge 16 of the key lever and pivoted at 13 to a horizontal link 14 in turn pivoted at 17 to a lower end of the type bar.
  • Depression of the key lever 4 causes a direct force transmission through links 10 and 14 to the type bar 7, swinging the upper end of the latter rapidly towards means 19.
  • the latter continues its swinging movement, acts to extend the links 26 and 30 into aligned parallelism whereby said links constitute, in effect, an extended toggle, and the leverage of the energy-storing means on this toggle is further augmented by an extension into aligned parallelism of the link portion of the element '18 with the long arm of the bell crank 21 to constitute in effect a second toggle, as shown in Figure 3.
  • the printing stroke of the type bar is silently limited by the extension of links 26 and 30, bringing the pivotal points 28, 29 and 31 into line and the extension mentioned, which transmits a powerful pressing force on the type head 9, also brings the pivotal points 22, and into line to prevent overtial accelerated throw of the links 26 and 30.
  • the bell crank 21 is arrested at this point by engagement of the short arm 23 thereof against the stop 24, the reacting bound there-between coupled with the pull of spring 33 acting to eflect immediate and rapid withdrawal of the type bar from printing position "0 the normal retracted position, as shown in Figure 1.
  • the stroke of the type bar under the force of the weight 19- is permitted by the loose engagement of the oft-set 15 on link 10 and the edge 16 of the key lever, these parts moving out of contact, as shown in Fi re 3.
  • the platen 3 may have a hard surfacing such as steel, not subject to noticeable wear.
  • the type bar connections. are capable of easy fore and aft adjustment, since the link 26, the bell crank 21 and the type bar 7 are all pivotally sup ported on the plate bracket 27, which latter is adjustably held on the angle bar 35 by. for.
  • an adjusting screw 36 and a lockin screw 37 for example, an adjusting screw 36 and a lockin screw 37.
  • the universa bar 38 isarranged for contact and actuation by the heel 39 of the type bar at its lower end.
  • a finger stroke on the key lever 4 effects a very rapid transposition of the parts to the position shown in Figure 2, thereafter movement of the type bar 7 isabruptly decelerated without, however, a distinct stoppage.
  • the speed of the type bar during the final portion of its stroke is decelerated and the force of its movement is augmented by the contemporaneous approach to extension of the toggle links 26 and 30, and the alignment of the long arm of the bell crank 21 with the connecting portion of the element 18, that is, the alignment of the pivotal points 20, 25 and 22.
  • the type action described operates to cause an initial quick transposition of the type'bar from retracted position to adjacent the platen un-- without noisy impact against the paper and with power to print by pressure. Furthermore, the protracted limit of the type bar is controlled through the links 26 and 30 substantially independently of the platen 3 and surplus energy of the parts, if any, is noiselessly absorbed through the cushioned engagement of the stop 24 and short arm 23 of the bell crank.
  • the key levers may be conventionally arranged in series of parallel rows and the fore ends thereof disposed to constitute the ordinary standard keyboard, and that the type bars 7 may be arranged in an are about the printing point,
  • the present action is susceptible of embodiment in relatively small size.
  • the parts are, furthermore, of substantial and rigid construction, not likely to get out of order, capable of easy adjustment and, more especially, operative to effect clearly defined character printing substantially silently. It will be understood. also, that the present invention is susceptible of embodiment in forms other than that specifically shown herein, without sacrifice of the major advantages herein indicated, and resident in the improved mechanism.
  • a typewriting-machine in combination, a. platen, a key lever, a. pivoted type bar, operative connecting means between said key lever and said type bar to eiiect initial movement of the. latter on its stroke toward said platen.
  • a sub-lever pivoted to swing about a fixed axisof motion, an element pivotally connected to said sub-lever, and operative connections between said element and said type bar adjacent the type head of the latter, said connections efiecting a storage of energy in said element during the movement of said type bar as propelled by said key lever and an expenditure of said stored energy thereafter to complete the printing stroke of said type bar.
  • a platen a depressible key lever.
  • a pivoted type bar operative connecting means-between said lever and said bar to effect the movement of the latter upon initial depression of the former and to permit continued movement of the latter independently of the former, means to acquire and store energy upon said initial movement of said type bar and to expend such energy thereafter to complete the printing stroke of said type bar, and means adjustable towards and from said platen to sup-port said type bar and said energy storing and expending means.
  • aplaten a depressible keylever, a pivoted type bar.
  • said last-mentioned means being associated with said bar to expend its stored energy in effecting a final printing movement of said bar, and a common means adjustable towards and from the platen to support said bar and said energy storing and expending means.
  • a typewriting machine in combination, a platen, a depressible key lever, a pivoted type bar, an operative connection between said key lever and said type bar to effect initial movement of the latter and I to permit continued movement thereof after arrest of the former, a stop to limit depression of said key lever, a pair of pivotally connected links, one connected to a rigid part and the other to said type bar adjacent the type head to limit the printing stroke of sai type bar substantial y independently of said platen, means connected ;to one of said links to store energy durnection at the other end to said means for storing and expending energy.
  • a supporting plate a swinging type bar pivotally mounted thereon at one end, a pair of pivotally connected links, one being pivotally connected to said type bar and the other pivotally connected to said supporting gate at the other end, and means where y the fore and aft position of said plate may be adjusted.
  • a supporting plate a swinging type bar pivotally mounted thereon at one end, a link pivotally connected to said type bar at its other end, a second link pivotally connected to said plate at its other end, said links being pivotally connected together, a swinging weighted sub-lever pivotally connected to one of said links, a second sub-lever pivotally connected to said plate and to said weighted sub-lever, and means to permit fore and aft adjustment of said plate.

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  • Handling Of Sheets (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
US453983A 1921-03-21 1921-03-21 Typewriting machine Expired - Lifetime US1471153A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US453983A US1471153A (en) 1921-03-21 1921-03-21 Typewriting machine
GB29047/21A GB189324A (en) 1921-03-21 1921-11-01 Improvements in and relating to type actions for typewriter machines
NL20930A NL12239C (de) 1921-03-21 1921-11-14
FR543828D FR543828A (fr) 1921-03-21 1921-11-23 Perfectionnements aux machines à écrire
DEN20560D DE411804C (de) 1921-03-21 1921-11-26 Typenhebel-Schreibmaschine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US453983A US1471153A (en) 1921-03-21 1921-03-21 Typewriting machine
GB29047/21A GB189324A (en) 1921-03-21 1921-11-01 Improvements in and relating to type actions for typewriter machines
NL20930A NL12239C (de) 1921-03-21 1921-11-14

Publications (1)

Publication Number Publication Date
US1471153A true US1471153A (en) 1923-10-16

Family

ID=26259709

Family Applications (1)

Application Number Title Priority Date Filing Date
US453983A Expired - Lifetime US1471153A (en) 1921-03-21 1921-03-21 Typewriting machine

Country Status (5)

Country Link
US (1) US1471153A (de)
DE (1) DE411804C (de)
FR (1) FR543828A (de)
GB (1) GB189324A (de)
NL (1) NL12239C (de)

Also Published As

Publication number Publication date
FR543828A (fr) 1922-09-09
GB189324A (en) 1922-11-30
NL12239C (de) 1924-12-15
DE411804C (de) 1925-04-04

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