GB1026659A - Wear compensation apparatus for print mechanisms - Google Patents

Wear compensation apparatus for print mechanisms

Info

Publication number
GB1026659A
GB1026659A GB51761/64A GB5176164A GB1026659A GB 1026659 A GB1026659 A GB 1026659A GB 51761/64 A GB51761/64 A GB 51761/64A GB 5176164 A GB5176164 A GB 5176164A GB 1026659 A GB1026659 A GB 1026659A
Authority
GB
United Kingdom
Prior art keywords
pulley
type head
wear
pawl
tape
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
GB51761/64A
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 GB1026659A publication Critical patent/GB1026659A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D11/00—Clutches in which the members have interengaging parts
    • F16D11/16—Clutches in which the members have interengaging parts with clutching members movable otherwise than only axially
    • 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
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/60—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies on spherical, truncated-spherical, or like surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/08—Friction clutches with a helical band or equivalent member, which may be built up from linked parts, with more than one turn embracing a drum or the like, with or without an additional clutch actuating the end of the band

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Transmission Devices (AREA)

Abstract

1,026,659. Typewriters. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 21, 1964 [Jan. 30, 1964], No. 51761/64. Heading B6F. Machines with types upon spherical surfaces; type-selecting mechanisms; power assisted type actions.-This subject-matter is identical with that in Specification 1,026,658. Wear compensation apparatus.-The wear compensating apparatus 10, Fig. 2, is designed to compensate for any wear in the rotary character selection mechanism, e.g. dilation of tape 26 and becomes effective when the type head 11 is rotated clockwise by five units and the case shift mechanism has not been actuated. The apparatus includes a dual pawl clutch means comprising a pair of pawls 57, 58, Fig. 3, mounted on arms 61 of an annular hub 62 rigidly attached to the type head spindle 12 and normally engaging a toothed flange 55 on a pulley 17 through the intermediary of a spring 66 to provide a rigid drive connection between the pulley 17 and spindle 12. The type head 11 moves counterclockwise under the influence of tape 26 or clockwise under the influence of spiral spring 21. When wear has taken place and the spiral spring 21, Fig. 4, has rotated the type head 11 five units in a clockwise direction, in response to the depression of a key, a stud 68 on the pawl 58 engages a stop plate 67 to pivot the pawl 58 out of engagement with teeth 56 on the flange 55 so as to disengage the pulley 17 from the type head 11, which remains in its proper typing position, but the pulley continues to rotate clockwise under the bias exerted by the spiral spring 21 until all slack in the tape has been taken up. As the rotary selection mechanism is de-energized and the pulley begins to rotate counterclockwise to its home position the pawl 58 drops into the teeth 56 on the pulley 17 at the adjusted position.
GB51761/64A 1964-01-30 1964-12-21 Wear compensation apparatus for print mechanisms Expired GB1026659A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US341245A US3224546A (en) 1964-01-30 1964-01-30 Wear compensating apparatus having plural pawls

Publications (1)

Publication Number Publication Date
GB1026659A true GB1026659A (en) 1966-04-20

Family

ID=23336808

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51761/64A Expired GB1026659A (en) 1964-01-30 1964-12-21 Wear compensation apparatus for print mechanisms

Country Status (6)

Country Link
US (1) US3224546A (en)
BE (2) BE658887A (en)
FR (1) FR1422715A (en)
GB (1) GB1026659A (en)
NL (1) NL6500971A (en)
SE (1) SE315605B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861511A (en) * 1973-03-07 1975-01-21 Ncr Co Rotational shaft coupling apparatus with adjustable coupling ratio and positive displacement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1865772A (en) * 1928-10-05 1932-07-05 Automatic Transmission Company Automatic clutch
US2360187A (en) * 1943-05-24 1944-10-10 Gen Motors Corp Torque limiting clutch
US2989166A (en) * 1960-05-02 1961-06-20 Ibm Wear compensator
US3133620A (en) * 1961-11-24 1964-05-19 Ibm Wear compensator with clamping device

Also Published As

Publication number Publication date
US3224546A (en) 1965-12-21
SE315605B (en) 1969-10-06
BE658888A (en) 1965-05-17
NL6500971A (en) 1965-08-02
BE658887A (en) 1965-05-17
FR1422715A (en) 1965-12-24

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