US2841264A - Infinite platen variable - Google Patents

Infinite platen variable Download PDF

Info

Publication number
US2841264A
US2841264A US566501A US56650156A US2841264A US 2841264 A US2841264 A US 2841264A US 566501 A US566501 A US 566501A US 56650156 A US56650156 A US 56650156A US 2841264 A US2841264 A US 2841264A
Authority
US
United States
Prior art keywords
platen
ratchet wheel
split ring
button
cap
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
US566501A
Other languages
English (en)
Inventor
Stig B Tibbling
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
Priority to NL94907D priority Critical patent/NL94907C/xx
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US566501A priority patent/US2841264A/en
Priority to FR1185408D priority patent/FR1185408A/fr
Priority to GB5182/57A priority patent/GB847251A/en
Application granted granted Critical
Publication of US2841264A publication Critical patent/US2841264A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/24—Detents, brakes, or couplings for feed rollers or platens

Definitions

  • This invention relates to improvements in variable line spacing clutches commonly used in connection with the platens of typewriters, adding machines, accounting machines, and other oflice machines.
  • the principal object of the invention is to provide an improved clutch which permits adjustment of clutched members relative to each other any desired amount.
  • Another object is to provide a variable spacing clutch which is cheaper to manufacture and assemble.
  • a further object is to provide a variable spacing clutch which may be quickly assembled or disassembled for cleaning, repair, and lubrication.
  • Still another object is to provide a clutch band operating mechanism which is unique in its simplicity of structure and is inexpensive to manufacture.
  • a still further object is to provide a variable spacing clutch that does not require a special platen core or a straight-through platen shaft.
  • Fig. l is a longitudinal section of one end of a platen with the improved clutch attached.
  • FIG. 2 is an exploded diagrammatic view showing the relationship of the parts in the improved clutch.
  • Fig. 3 discloses two operable positions of a split ring used in the clutch.
  • an improved clutch 1 for connecting a platen 2 of a typewriter in driven relation with a ratchet wheel 3 which may either by rotated by any suitable means not shown, or act as a detent member on manual rotation of the platen.
  • the platen comprises, as
  • a metallic tube 5 supporting a shell 6 which may be of rubber or other suitable resilient material in accordance with the usual practice in the art.
  • a platen supporting hub 8 Forced into one end of the tube 5 is a platen supporting hub 8 which may be a die-casting of some light metallic alloy such as Duralumin or may be turned from bar stock as desired.
  • a cap member iii Secured to the hub 8 by means of a pair of screws 9, as shown in Fig. 2, is a cap member iii. Extending axially through the cap member is an opening 12, and surrounding this opening at the right hand side of the cap is a flange 14- adapted to fit into a recess 15 in the hub 8 for aligning the parts.
  • a tubular member 16 Connected to the cap around the opening 12 at its left hand end is a tubular member 16, and fixed to the tubular member is a sleeve 17 adapted to cooperate with a platen support, not shown, for holding the platen against longitudinal movement.
  • a knob 18 mounted upon the sleeve 17 is a knob 18 which may be operated manually for rotating the platen to any desired position.
  • a button 24 Slidably mounted within a central opening in the knob is a button 24 having a reduced portion 21 extending into the left hand end of the tubular member 16.
  • a slot 22 Formed in the side of the cap Iii adjacent the hub 8 is a slot 22 extending diametrically of the cap and opening at its ends through a reduced cap portion 23 of cylindrical shape.
  • a pivot member 24 Rotatably received within the slot 22 is a pivot member 24 having a rectangular cam element 25 fixed to one end and resting upon the surface of the cap portion 23.
  • a split ring 25 Surrounding the cap portion 23 is a split ring 25 having its ends normally engaging the sides of the cam element 25.
  • the ratchet wheel 3 surrounds the split ring with only a slight clearance between them and is held in place adjacent the hub 8 by an enlarged portion 28 on the cap it).
  • the pivot member 24 has rectangular portions 36 spaced equal distances from its mid-point, and each of these portions fits into a rectangular opening in a side of elongated lever 31 which is U-shaped in cross section.
  • elongated slot 32 Formed in the supporting hub 8 is an elongated slot 32 through which the lever extends into the interior of the tubular member 5.
  • Fixed to the cap it) is a bracket 33 which also extends through the slot 32 into the member 5 to substantially the same extent as the lever 31 and in parallel relation with the latter.
  • Mounted upon the right hand end of the bracket is a pulley 35.
  • a ball chain 36 is connected to the free end of the lever 31, extends over the pulley 35 and a spoolshaped guide portion 37 of the pivot member 24, then passes through the tubular member 15 and is connected to the reduced portion of the button 20.
  • a spring 38 which acts between the button and a shoulder 39 on the member 16 to apply a tension of the chain.
  • the tension is such as to rock the lever 31 and turn the pivot member 2% clockwise, as viewed in Fig. 2, so that the cam element 25 acts on the ends of the split ring 26 and expands the latter to engage the inner surface of the sprocket wheel.
  • the platen is then directly connected to the sprocket wheel through the split ring, the pivot member 24, the cap 10 and the supporting hub 8.
  • the knob 18 may then be rotated manually to turn the platen free of the sprocket wheel.
  • a clutch mechanism for controlling a driving connection between said platen and said ratchet wheel comprising, in corn bination, a member fixed to said platen and having a cylindrical portion extending through said ratchet wheel, a split ring clutching eiement mounted concentrically between said ratchet wheel and said cylindrical portion, said split ring clutching element being normally free of said ratchet wheel but adapted to be expanded into clutching engagement with the latter, a pivot element supported by said member and having a cam portion engaging the ends mechanism for controlling .a'driving connection between said platen and said ratchet wheel comprising, in cornbination, a member fiXed to said platen and having a cylindrical portion extending throughsaid ratchet wheel, a
  • split ring clutching element mounted between said ratchet wheel and said cylindricalportion, a pivot element supported'by said member and having a cam portion engagmg the ends of said split ring elutching element,- a knob fixed tosaid member for rotating said platen, a button slidably received Within an opening insaid knob, means connecting said button to said pivotelement, and a spring acting on said button for rotatingsaid pivot element to effect an expansion of said split ring clutching element into driving engagement'withsaid ratchet wheel, said button operating when pressed: inwardly to compress said spring and permit said split ring'clutching element todi'sengage said ratchet wheel so that said platen may be rotated'by said knob free of saidratchet wheel.
  • a knob fixed to said member for rotating said platen a button slidably, received within an opening in said knob, means connecting said button to said p ivot element, said means comprising a lever fixed to said pivot-element and extending within said platen and a flexible element connected atits ends to said button and said lever, and a spring acting onr said button for rotating said piv ot element tofitfectjan ex pansion of said split ring clutching element into driving engagement with said ratchet wheel, said buttonoperating when pressed inwardly to compress said spring and permit said split ring clutching element to disengage said ratchet wheel so that said platen may be rotated by said knob free of said ratchet wheel.
  • a clutch mechanism for controlling a' driving connection between said platen and saidratchet wheel comprising, in combination, a member fixed to said platen and having a cylin- 7 said members whereby a releasable drive is provided be-' drical portion extending through said ratchet wheel, a split ring clutching element mounted between said ratchet wheel and said cylindrical portion, a pivot element sup ported by said member and having a cam portion engaging the ends of said split ring clutching element, a knob fixed to said member for rotating said platen, a button slidably received withina'n opening in said knob, a lever fixed to said pivot'element, a flexible strand connecting; said knob and said lever, and a spring acting through said button, said strand, a'ndisaid lever, for rotating said pivot element to'eifect an expansion of
  • a clutch mechanism for controlling a driving connection between said platen and said ratchet wheel comprising, in combination, a cap fixedto one end of said platen and having a cylindrical portion extending through said ratchet wheel,- a tubular memberfixed to said cap, a knob attached to said tubular member for rotating said platen, said knob" having an opening communicating Withsaid tubular'memher, a split ring clutching element arranged between said ratchet wheel and the cylindrical portion of said cap, a

Landscapes

  • Mechanical Operated Clutches (AREA)
  • Handling Of Sheets (AREA)
US566501A 1956-02-20 1956-02-20 Infinite platen variable Expired - Lifetime US2841264A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL94907D NL94907C (fr) 1956-02-20
US566501A US2841264A (en) 1956-02-20 1956-02-20 Infinite platen variable
FR1185408D FR1185408A (fr) 1956-02-20 1957-02-14 Embrayage à course variable pour platine de machine à écrire
GB5182/57A GB847251A (en) 1956-02-20 1957-02-15 Improvements in or relating to variable line spacing clutch mechanisms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US566501A US2841264A (en) 1956-02-20 1956-02-20 Infinite platen variable

Publications (1)

Publication Number Publication Date
US2841264A true US2841264A (en) 1958-07-01

Family

ID=24263155

Family Applications (1)

Application Number Title Priority Date Filing Date
US566501A Expired - Lifetime US2841264A (en) 1956-02-20 1956-02-20 Infinite platen variable

Country Status (4)

Country Link
US (1) US2841264A (fr)
FR (1) FR1185408A (fr)
GB (1) GB847251A (fr)
NL (1) NL94907C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474889A (en) * 1967-04-27 1969-10-28 Friden Inc Card clamp for typewriter platens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1792105A (en) * 1928-09-28 1931-02-10 Firm Rheinische Metallwaaren U Typewriting and similar machine
US1889047A (en) * 1930-06-21 1932-11-29 Rheinische Metallw & Maschf Coupling for typewriter line spacing wheels

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1792105A (en) * 1928-09-28 1931-02-10 Firm Rheinische Metallwaaren U Typewriting and similar machine
US1889047A (en) * 1930-06-21 1932-11-29 Rheinische Metallw & Maschf Coupling for typewriter line spacing wheels

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474889A (en) * 1967-04-27 1969-10-28 Friden Inc Card clamp for typewriter platens

Also Published As

Publication number Publication date
GB847251A (en) 1960-09-07
FR1185408A (fr) 1959-07-31
NL94907C (fr)

Similar Documents

Publication Publication Date Title
US4161373A (en) Typing device including a type disc
US2047737A (en) Clutch mechanism
US3212616A (en) Space and repeat space bar mechanism for an electric typewriter
US2841264A (en) Infinite platen variable
US3406807A (en) Printer in which type is projected and type head moved toward platen
US2683599A (en) Strip feeding apparatus
US2454122A (en) Selective single control mechanism
US3244012A (en) Fine tuner
US4389130A (en) Device for coupling and releasing a daisy wheel type member
US2104559A (en) Clutch mechanism for typewriting machines
US3254539A (en) Fine tuner
US2484198A (en) Noiseless escapement mechanism
US2258815A (en) Tuning mechanism
US4076109A (en) Dual friction clutch for motion-picture projectors
JP2535079B2 (ja) 振動装置
US3889794A (en) Typewriter platen releasing mechanism having an elastically deformable gear disc
US2858927A (en) Platen roll
US2120360A (en) Typewriting machine
JPH0142403B2 (fr)
US3250368A (en) Line-spacing wheel and clutch for a typewriter
US4165499A (en) Channel-selecting, presettable, rotary type tuning device
US2819781A (en) Universally adjustable platen for writing machine
US2724480A (en) Platen assembly
US1821099A (en) Typewriting machine
US2189942A (en) Motor driven carriage return mechanism for typewriters