GB891070A - Case shift mechanism for typewriters - Google Patents

Case shift mechanism for typewriters

Info

Publication number
GB891070A
GB891070A GB25828/60A GB2582860A GB891070A GB 891070 A GB891070 A GB 891070A GB 25828/60 A GB25828/60 A GB 25828/60A GB 2582860 A GB2582860 A GB 2582860A GB 891070 A GB891070 A GB 891070A
Authority
GB
United Kingdom
Prior art keywords
cam
case
lever
power
type
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
Application number
GB25828/60A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB891070A publication Critical patent/GB891070A/en
Expired legal-status Critical Current

Links

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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/24—Case-shift mechanisms; Fount-change arrangements
    • 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
    • B41J23/00—Power drives for actions or mechanisms
    • B41J23/02—Mechanical power drives
    • B41J23/12—Mechanism driven by cams engaging rotating roller

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Printers Characterized By Their Purpose (AREA)
  • Transmission Devices (AREA)

Abstract

891,070. Typewriters. INTERNATIONAL BUSINESS MACHINES CORPORATION. July 25, 1960 [Aug. 12, 1959], No. 25828/60. Class 100(4) A case-shift mechanism for moving a typecarrying member 1, Fig. 1, comprises means for urging it to one case position, means including a cam member 16, movable in one direction for forcing the type-carrier 1 to other case position and movable in the opposite direction for controlling the rate of movement of the type-carrier 1 under the urging means, a power roll 35, a power cam 33 for moving cam 16 in the one direction and controlling rate of movement in the other opposite direction, latching means 18, 25 for holding power cam 33 free of power roll 35 and a key-lever 42 operable to release the latching means to initiate a case-shift operation. As shown in Fig. I the type-carrying member is a basket 1 and is latched in lower-case position. Operation of the key-lever 42 works a link 57, one of the arms 50, 51, loosely mounted on pin 26, and moves the latch element 25. A key-lever link 41 also pivots a release lever 39, this releases a pin 36 on the power cam 33, whereupon a spring arm 47 rocks the cam into engagement with power roll 35. There is, at first, a small counter-clockwise movement of a control lever 30 due to the shape of cam 33 but then the latter controls the spring urged case shift movement through the mechanism 29, 18, 16, 15, 12, 10, 9. When the key-lever 42 is released the lever 39 is moved into the path of a pin 36 and a spring arm 47, acting on the pin 46, causes the cam 33 to engage the power roll 35 which effects power shift of the basket back to its raised or lower-case position. The case-shift mechanism may also be applied to a typewriter employing a truncated spherical type-member 68 as shown in Fig. 2. In this case the upper and lower case type are on different sides of a vertical bisecting plane and the sphere is rotated by a tape 69 controlled by follower 80 and cam 82 worked in a manner similar to a follower and cams 15, 16 described above. Specifications 655,492 and 842',327 are referred to.
GB25828/60A 1959-08-12 1960-07-25 Case shift mechanism for typewriters Expired GB891070A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US833337A US3001630A (en) 1959-08-12 1959-08-12 Case shift mechanism for typewriters

Publications (1)

Publication Number Publication Date
GB891070A true GB891070A (en) 1962-03-07

Family

ID=27245634

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25828/60A Expired GB891070A (en) 1959-08-12 1960-07-25 Case shift mechanism for typewriters

Country Status (4)

Country Link
US (1) US3001630A (en)
DE (1) DE1190958B (en)
FR (1) FR1265015A (en)
GB (1) GB891070A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3780845A (en) * 1970-09-04 1973-12-25 Reilly T O Power driven typewriter with single type head

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3414103A (en) * 1966-03-31 1968-12-03 Epsco Inc Signal responsive and signal generating means for single element print head typewriter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453287A (en) * 1944-10-07 1948-11-09 Ibm Power operating mechanism for typewriting machines
US2797790A (en) * 1950-10-13 1957-07-02 Commerical Controls Corp Case shift mechanism for typewriters
US2730224A (en) * 1953-02-10 1956-01-10 Underwood Corp Power case-shift mechanism
DE1810729U (en) * 1954-09-10 1960-05-05 Adlerwerke Kleyer Ag H SWITCHING DEVICE FOR WRITING OR PRINTING OFFICE MACHINES WITH POWER DRIVE.
US2896766A (en) * 1957-09-30 1959-07-28 Smith Corona Marchant Inc Typewriter case shift mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3780845A (en) * 1970-09-04 1973-12-25 Reilly T O Power driven typewriter with single type head

Also Published As

Publication number Publication date
DE1190958B (en) 1965-04-15
FR1265015A (en) 1961-06-23
US3001630A (en) 1961-09-26

Similar Documents

Publication Publication Date Title
GB1141587A (en) Keyboard operated printer
US2818958A (en) Escapement pawl control
GB891070A (en) Case shift mechanism for typewriters
GB899368A (en) Improved key operating machine
US3040859A (en) Margin stop mechanism
GB1386329A (en) Code keyboard for typewriters and similar office machines
GB1188920A (en) Selective Printer with Movable Platen.
GB1509854A (en) Printing machines
US2073902A (en) Noiseless typewriter
GB1067718A (en) Improvements in or relating to the impact adjustment of type-bars in power-driven typewriters
GB1088179A (en) Function operating device for an electric typewriter
US3752289A (en) Typewriter escapement and control devices therefor
GB1346979A (en) Tabulating mechanism
GB983549A (en) Improvements in typewriters
GB900486A (en) A motor-driven typewriting office machine
GB773270A (en) Impression control for typewriting machine
GB823136A (en) Proportional letter feed mechanism
GB1325915A (en) Printing mechanism
GB843696A (en) Improvements in or relating to typewriters
GB751170A (en) Floating escapement mechanism
GB351495A (en) Improvements in or relating to printing mechanism
GB1457323A (en) Key-operated input mechanism for typewriters or similar machines
SE307590B (en)
GB1258725A (en)
GB1165076A (en) Control Mechanism for Typewriters, Calculators, etc.