US1791074A - Key-action device for typewriting machines - Google Patents

Key-action device for typewriting machines Download PDF

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Publication number
US1791074A
US1791074A US227393A US22739327A US1791074A US 1791074 A US1791074 A US 1791074A US 227393 A US227393 A US 227393A US 22739327 A US22739327 A US 22739327A US 1791074 A US1791074 A US 1791074A
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US
United States
Prior art keywords
arms
key
link
bar
links
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
US227393A
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English (en)
Inventor
Kappler Paul
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Individual
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Individual
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Filing date
Publication date
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Publication of US1791074A publication Critical patent/US1791074A/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

  • the invention relates to typewriting ma-- chinos having an obliquely arranged type bar bearing segment and in which each key lever r bars close to the latter, so that a space is left between the rods andthe upright arm of thel link. This space has heretofore not been utilized. With the known machine', moreover, the link bearingis bent, which gives '20 rise to unsatisfactory leverage.
  • the universal bar and the extensions of the lower link arm which drive the universal bar are accommodated in the aforesaid space.
  • the axle of the lower link is also made straight, which carries with it further advantages.
  • the manufacture and assembly is simplified and uniform angular movements and equal lengths of the link levers are also obtained. This is an advantage inquantity production.
  • This also simplies overcoming the lateral distance between th'e link bearings and the plane of I movementrof the type bar, it being only necessary for this purpose to correspondingly bend the upright arm to one side. It is then only necessary y*to Vbend the two ends of the connecting rods away from each other so 40 Athat they move about intersecting axes. This bending of the ends of the connecting rods does not giverise to any inconvenience
  • the utilization of space is also aided by the fact that the upper link pivot is not exactly verticallyy situated above the lower link pivot,but
  • the upper link is 227,393, and in Germany November 27, 1926.
  • a machine constructed according to the present invention only requires the upper and lower links (whichare mounted on two straight pivots) as the intermediate elements for transmittingthe movementl from the keys to the type bars, the connecting rods and suitably positioned return springs.
  • the lower links are shaped to form both the universal key levers and the upright arms.
  • Fig. 1 is a longitudinalsectional view of 70 the machine.-
  • Fig. 2 isa plan view of one of the outer type bars and relative parts.
  • Fig. 3 is a view looking from the rear toward some of the parts shown in Fig. 2.
  • Fig. 4 is a sectional lan view of part of the machine on one si e of its longitudinal center line :zz-.
  • Fig. 5 is a view showing a detail of construction. 80
  • the keys 1, 2,'3 and 4 are connected above to a link 5 and below to a link 6, which forms one arm of an intermediate lever 7. The keys are thus guided in an almost strai ht path.
  • the links 5 and 6 are mounted on rods or pins 85 8 and 9. These are inserted in the bearing bracket 10 of the machine frame 11, the bracket- 10 being slotted in known manner to receive and guide the links.
  • the pin or rod 8 e is set further forward than the pin or rod 9. 90
  • the keys 1-4 all have an equal downward movement.. Consequently, theyl all describe the same angle of movement, so that arms 12 on the levers 7, through which the universal bar 13 is driven all make the same an- 95 gular movement.
  • the parts driven from the universal bar 13, i. e., the carriage escapement mechanism, the ribbon feed and ribbon shift motion, are all actuated in exact- .ly the same manner by every one of thekeys. 10U* ⁇ n... uu
  • one above the other rlhe intermediate lever 7 forms the upright arm of a three-armed lever including the link 6 and arm 12.
  • 'llhe arms 7 transmit motion to the type bars through connecting rods 14.
  • rllhe diEerent travel due to the various heights and inclinations ot the type bars is compensated by correspondin variations of the lengths and lateral ben in of the arms 7, as seen in Fig. 2.
  • the arms 7 stand almost upright.
  • the channeled cross bar '16 .of the spacing lever 19 owing to the forward position. ol the pivot 8.
  • a typewriter of that kind having an obliquely arranged type bar bearing segment, the combination with the type bars, ot type bar actuating key levers and a spacing key lever, a pair of parallel motion linkmenh bers coupled to each key lever and pivoted upon horizontal trans- I verse axes to the machine frame, the lower and connecting the vertical arms of t link member bein longer than the upper link member and having an extension arm projecting horizontally in rear of its pivot and carrying a substantiall vertical arm, a universal bar disposed in t e angle between said horizontal and Vvertical arms of the lower link members so as to overlie the horizontal arms of said link members for movement thereby inone direction upon the depression of the respective key levers, connecting rods underlying the bank of type bars ve lower link members with the type bars., rocker arms carryin the universal vbar arms tor actuatin sai rocker arms, and a connecting member etween said actuating arms operatively connected to the spacin lever, said
  • a typewriter ot the character set forth in claim 1 wherein the pivotal support for the upper and lower link members of the parallel motion .links is straight and the pivotal support for the lower link member is gli) arranged in a vertical plane in rear of the v vertical plane of the pivotal support tor the upper link member.

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  • Document Processing Apparatus (AREA)
  • Transmission Devices (AREA)
US227393A 1926-11-27 1927-10-20 Key-action device for typewriting machines Expired - Lifetime US1791074A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE281272X 1926-11-27

Publications (1)

Publication Number Publication Date
US1791074A true US1791074A (en) 1931-02-03

Family

ID=6035270

Family Applications (1)

Application Number Title Priority Date Filing Date
US227393A Expired - Lifetime US1791074A (en) 1926-11-27 1927-10-20 Key-action device for typewriting machines

Country Status (4)

Country Link
US (1) US1791074A (ja)
BE (1) BE345998A (ja)
FR (1) FR653204A (ja)
GB (1) GB281272A (ja)

Also Published As

Publication number Publication date
FR653204A (fr) 1929-03-19
BE345998A (ja)
GB281272A (en) 1928-04-19

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