US2891650A - Typewriters - Google Patents

Typewriters Download PDF

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Publication number
US2891650A
US2891650A US728648A US72864858A US2891650A US 2891650 A US2891650 A US 2891650A US 728648 A US728648 A US 728648A US 72864858 A US72864858 A US 72864858A US 2891650 A US2891650 A US 2891650A
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US
United States
Prior art keywords
lever
typing
bar
shaft
spring
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
US728648A
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English (en)
Inventor
Ascoli Enzo
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.)
Paillard SA
Original Assignee
Paillard SA
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 Paillard SA filed Critical Paillard SA
Application granted granted Critical
Publication of US2891650A publication Critical patent/US2891650A/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
    • B41J7/92—Impact adjustment; Means to give uniformity of impression
    • B41J7/94—Character-by-character adjustment

Definitions

  • the present invention has for its subject a typewriter comprising a number of type bars of which each carries an upper type and a lower type, a moving mechanism allowing of selecting which of the said two types is to be typed, a shaft in permanent rotation allowing of driving, as a result of acting on a key of the keyboard of the machine, an element of a typing mechanism provided for each of the type bars, in such a manner as to effect the typing of one of two types of the corresponding bar, a stop member located parallel to the said shaft and capable of occupying two different positions under the action of the said motion mechanism, being provided for interrupting the driving of the said element.
  • the typewriter according to the invention is distinguished from knowntypewriters by the fact that the said element of the typing mechanism comprises two counter stops adapted to co-operate with the said stop member, the one for typing an upper character, the other for typing a lower character, respectively.
  • Fig. 1 is a side view, partly in section, of a typing mechanism of the machine.
  • Fig. 2 shows, to a larger scale, a detail of Fig. 1.
  • Figs. 3, 5 and 6 show some control members of the machine located at one of the ends of the motor shaft.
  • Fig. 4 is a section on the line IV-IV of Fig. 3.
  • Fig. 7 is similar to Fig. 2 and shows a modified form of construction.
  • the machine comprises a shaft 1 located parallel to the platen 2 and driven inpermanent rotation by an electric motor not shown. concentrically to the shaft 1 is mounted, through the medium of a coupling device, an element 4.
  • the coupling 3 is not the subject of this invention and therefore will not be described. It is described in co-pending application Serial No. 647,133, filed March 19, 1957.
  • a two-armed lever 5, hinged to the element 4 at 6, is adapted to actuate the coupling 3.
  • the element 4 comprises a lug 7.
  • the lug carries two screws 10 and 11 adapted to co-operate as counter stops, with a rod 12 passing from one end of the typewriter to the other parallel to the shaft 1 and constituting a universal stop member.
  • the arm 5a of the lever 5 is adapted to co-operate with a pawl 13 hinged near the end of an arm 14a of a lever 14 pivoted at 15.
  • the pawl 13 is held against a stop 16 by a spring 17.
  • the other arm 14b is hinged to acurved lever 18. Said latter carries at one of its ends a key 19, its other end being hinged to a lever 20 pivoted at 21.
  • spring 22 maintains the assembly of levers 14, 18 and 20,
  • the other arm 5b of the lever 5 is adapted to cooperate with the bent end 25a of a lever 25 connected in the known manner, by intermediate levers 26 and 27 and rods 28, 29 and 30, to a type bar 31 carrying types 32 and 33.
  • a spring 34 acting on the lever 26 maintains the whole of this assembly in the position of rest, which position is determined by the bearing of the lever 25 against a cushion 35.
  • Each of the ends 12a of the rod 12 is pivoted in a lever 36 hinged to a support 37 carrying the bearing 38 of the shaft 1 (see Figs. 3 and 4).
  • Each of the levers 3.6 of which only one is shown in the drawing, comprises a toothed segment 39 co-operating with a toothed Wheel 40 secured to a spindle 41, in such a manner that the rotation of one of the levers 36 also produces the rotation of the other.
  • the rod 12 carries a lever 42 subjected to the action of a spring 43 tending to cause it to turn and consequently also the rod 12 in a clockwise direction (see Figs. 5 and 6).
  • the rotation of the lever 42 is limited by the bearing of a finger 44, secured to its end, against the periphery of an eccentric 45 mounted freely on the shaft 1.
  • a lever 47 On one of the faces .of the eccentric 45 is pivoted, at 46, a lever 47.
  • a spring 48 tends to cause the lever 47 to turn in an anti-clockwise direction, in such a manner as to engage a tooth 49, provided on the lever, between the teeth of a whee1 50 secured in rotation with'the shaft 1.
  • a lever 51 comprises at its end a projection 51a which carries a key 52 adapted to control the motion mechanism and retains the end 47a of the lever 47, against the action of the spring 48, in such a manner as to maintain the tooth 49 disengaged from the wheel 50.
  • the lever 51 and consequently, the key 52, is held in the normal position (Fig. 5) by the action of a spring 53.
  • the eccentric 45 comprises two diametrically opposite notches 54 and 55 adapted to co-operate with a pawl 56 pressed against the eccentric 45 by a spring 57.
  • the typing mechanism of the typewriter above described functions in the following manner:
  • the shaft 1 turns in an anti-clockwise direction, without driving the element 4.
  • the key 19 is depressed against the action of the spring 22, until the lever 18 abuts against the cushion 24.
  • the lowering of the key produces, through the medium of the lever 14, the pawl 13 and the lever 5, the coupling of the element 4 to the shaft 1 and, consequently, its driving by the latter in a counter-clockwise direction (see co-pending application above referred to).
  • the rotation of the element 4 produces, through the medium of the lever 5 3 and the intermediate levers 25, 26 and 27, the rotation of the bar 31 in an anti-clockwise direction, against the action of the spring 34.
  • the typewriter described above allows of the adjustment of the typing force, not only simultaneously for all the type bars and separately for each thereof, but also separately for each of the types of the same bar and this independently for each of the bars.
  • Fig. 7 shows a modification of construction.
  • the lug 7 only comprises a single adjustable counter stop, particularly the screw 11, the screw it being replaced by a stationary counter stop 58.
  • the bar 12 comprises an extension 12b adapted to receive a row of adjustable stops, particularly of screws 59, one for each of the type bars.
  • the screw 59 is adapted to cooperate with the stationary counter stop 58 of the lug 7.
  • the operation of said modification is identical with that explained above.
  • a typewriter comprising a keyboard, having a plurality of keys, a number of type bars, an upper type and a lower type on each of said type bars, a motion mechanism allowing ofselecting which of said two types is to be typed, a shaft mounted for permanent rotation inlsaid typewriter allowing of driving, as a result of acting on one of said keys, an element of a typing mechanism provided for each of said type bars, in such a manner as to effect the typing of one of two types of the corresponding bar, and a stop member located parallel to said shaft and capable of occupyingtwo different positions under the action of said motion mechanism, said stop member serving to interrupt the driving of said element, said element of said typing mechanism comprising two counter stops, said counter stops being adapted to cooperate with said stop member, the one for typing an upper character, the other for typing a lower character, respectively.

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
US728648A 1957-05-29 1958-04-15 Typewriters Expired - Lifetime US2891650A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH839228X 1957-05-29

Publications (1)

Publication Number Publication Date
US2891650A true US2891650A (en) 1959-06-23

Family

ID=4541045

Family Applications (1)

Application Number Title Priority Date Filing Date
US728648A Expired - Lifetime US2891650A (en) 1957-05-29 1958-04-15 Typewriters

Country Status (8)

Country Link
US (1) US2891650A (fr)
BE (1) BE565108A (fr)
CA (1) CA620332A (fr)
CH (1) CH336847A (fr)
FR (1) FR1194132A (fr)
GB (1) GB839228A (fr)
IT (1) IT587362A (fr)
NL (1) NL104772C (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3077255A (en) * 1960-07-11 1963-02-12 Sperry Rand Corp Typing impression control for typewriters
US3233714A (en) * 1961-09-09 1966-02-08 Mecanographie Japy Soc D Striking intensity control providing varying adjustments for different type levers
US3250366A (en) * 1963-08-07 1966-05-10 Olympia Werke Ag Apparatus for equalizing the impacts of types in the lower case and upper case positions
US3250365A (en) * 1963-05-02 1966-05-10 Olympia Werke Ag Apparatus for adjusting the impact forces of types
US3371764A (en) * 1965-10-02 1968-03-05 Olympia Werke Ag Power roll coupling cam

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697502A (en) * 1951-12-15 1954-12-21 Underwood Corp Uniform impression typing mechanism
US2750022A (en) * 1954-10-20 1956-06-12 Ibm Type bar impact control

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697502A (en) * 1951-12-15 1954-12-21 Underwood Corp Uniform impression typing mechanism
US2750022A (en) * 1954-10-20 1956-06-12 Ibm Type bar impact control

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3077255A (en) * 1960-07-11 1963-02-12 Sperry Rand Corp Typing impression control for typewriters
US3233714A (en) * 1961-09-09 1966-02-08 Mecanographie Japy Soc D Striking intensity control providing varying adjustments for different type levers
US3250365A (en) * 1963-05-02 1966-05-10 Olympia Werke Ag Apparatus for adjusting the impact forces of types
US3250366A (en) * 1963-08-07 1966-05-10 Olympia Werke Ag Apparatus for equalizing the impacts of types in the lower case and upper case positions
US3371764A (en) * 1965-10-02 1968-03-05 Olympia Werke Ag Power roll coupling cam

Also Published As

Publication number Publication date
GB839228A (en) 1960-06-29
IT587362A (fr)
CA620332A (en) 1961-05-16
BE565108A (fr)
NL104772C (fr)
CH336847A (fr) 1959-03-15
FR1194132A (fr) 1959-11-06

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