GB1189765A - Half-space carriage back-spacing mechanism for typewriters - Google Patents

Half-space carriage back-spacing mechanism for typewriters

Info

Publication number
GB1189765A
GB1189765A GB5525/68A GB552568A GB1189765A GB 1189765 A GB1189765 A GB 1189765A GB 5525/68 A GB5525/68 A GB 5525/68A GB 552568 A GB552568 A GB 552568A GB 1189765 A GB1189765 A GB 1189765A
Authority
GB
United Kingdom
Prior art keywords
lever
dog
engages
pawl
letter
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
GB5525/68A
Inventor
Venanzio Micheletti Cremasco
Domenico Roano
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.)
Olivetti SpA
Original Assignee
Olivetti SpA
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 Olivetti SpA filed Critical Olivetti SpA
Publication of GB1189765A publication Critical patent/GB1189765A/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
    • B41J25/02—Key actions for specified purposes
    • B41J25/04—Back spacing
    • 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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/18—Character-spacing or back-spacing mechanisms; Carriage return or release devices therefor
    • B41J19/60—Auxiliary feed or adjustment devices
    • B41J19/62—Auxiliary feed or adjustment devices for back spacing

Landscapes

  • Character Spaces And Line Spaces In Printers (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

1,189,765. Typewriters. ING. C. OLIVETTI & C. S.p.A. 2 Feb., 1968 [6 Feb., 1967], No. 5525/68. Heading B6F. Single pawl escapment; back-spacing.-A back-spacing mechanism for half-spaces comprises a toothed rack 8 on the typewriter carriage normally engaged by a single escapement dog 9 and which is momentarily disengaged to permit letter-spacing, and a backspacing pawl 41 which is firstly pivotal to engage the rack and is then moved to the right, Fig. 1, to effect back-spacing; the pawl 41 having a lug 52 so that when, and only when, it is in the rightward position it can be released simultaneously with the disengagement of the escapement dog 9. The escapement dog 9 is actuated from a part revolution cam 21 clutched to a continuously rotating drive shaft 22 causing a follower lever 25 to pivot a lever 27 which firstly pivots a lever 32 having a lug 36 at the other end that engages a shoulder 37 to release the dog 9. Then the lever 27 engages a projection 30 of a hook 18 causing the release of a lever 11 upon upon which the dog 11 is mounted at 10. As the lever 11 rotates up to a stop 38 it causes the dog 9 to move to the right so it engages the next tooth of the rack 8. The rack 8 being urged to the left in a letter-space direction, effects a whole letter-space. The type-carriage is back-spaced by half a letter-space by the operation of a key 71 and a part revolution clutch 60 operates a follower lever 56, bell-crank 47 and a connecting rod 45. This causes a lever 43 to pivot on pin 44 whereby the pawl 41 firstly engages the rack and then moves it a half letter-space in the backward direction. If the key is released the carriage returns to the original position, but if the key 71 is held depressed and a type key operated, the rocking of the lever 27 turns a shaft 28 which has a lever 53 which engages the lug 52 on the pawl 41 which is thereby released.
GB5525/68A 1967-02-06 1968-02-02 Half-space carriage back-spacing mechanism for typewriters Expired GB1189765A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5045467 1967-02-06

Publications (1)

Publication Number Publication Date
GB1189765A true GB1189765A (en) 1970-04-29

Family

ID=11272997

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5525/68A Expired GB1189765A (en) 1967-02-06 1968-02-02 Half-space carriage back-spacing mechanism for typewriters

Country Status (8)

Country Link
US (1) US3578132A (en)
JP (1) JPS4841654B1 (en)
BE (1) BE710078A (en)
CH (1) CH470262A (en)
DE (1) DE1611471C3 (en)
FR (1) FR1553357A (en)
GB (1) GB1189765A (en)
SE (1) SE330031B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893561A (en) * 1973-11-23 1975-07-08 Ibm Half backspace for dual pitch typewriter
US4408918A (en) * 1981-05-01 1983-10-11 Scm Corporation Halfspace control system for electronic typewriter with correction register

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US605201A (en) * 1898-06-07 Type-writing machine
US1052526A (en) * 1910-05-21 1913-02-11 Elliott Fisher Co Back-spacing mechanism for type-writing machines.
US1351993A (en) * 1915-09-25 1920-09-07 Underwood Typewriter Co Typewriting-machine
US1183056A (en) * 1916-02-16 1916-05-16 Edward M Wiley Type-writer half-spacing key.
US1215307A (en) * 1916-11-11 1917-02-06 Underwood Typewriter Co Type-writing machine.
US2212692A (en) * 1939-05-01 1940-08-27 Leon L Kitchens Flexible tooth gear
US2542632A (en) * 1948-04-14 1951-02-20 Molin Armando Dal Typewriter for typing music notes
US3288262A (en) * 1962-11-08 1966-11-29 Olivetti & Co Spa Variable spacing mechanism for typewriters and like machines
DE1303084C2 (en) * 1963-02-27 1974-01-31 Triumph Werke Nuernberg Ag CARRIAGE CONTROL UNIT FOR TYPICAL OR SIMILAR MACHINERY
US3232405A (en) * 1963-06-26 1966-02-01 Ibm Typewriter escapement mechanism with spacing means
US3270851A (en) * 1963-08-08 1966-09-06 Scm Corp Typewriter
FR1475538A (en) * 1965-04-23 1967-03-31 Olympia Werke Ag Exhaust block for stepper control mechanism of the carriage of a typewriter

Also Published As

Publication number Publication date
DE1611471B2 (en) 1977-08-11
DE1611471A1 (en) 1970-12-23
BE710078A (en) 1968-05-30
SE330031B (en) 1970-11-02
CH470262A (en) 1969-03-31
JPS4841654B1 (en) 1973-12-07
US3578132A (en) 1971-05-11
FR1553357A (en) 1969-01-10
DE1611471C3 (en) 1978-04-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee