GB1244251A - Incremental drive apparatus - Google Patents

Incremental drive apparatus

Info

Publication number
GB1244251A
GB1244251A GB859/69A GB85969A GB1244251A GB 1244251 A GB1244251 A GB 1244251A GB 859/69 A GB859/69 A GB 859/69A GB 85969 A GB85969 A GB 85969A GB 1244251 A GB1244251 A GB 1244251A
Authority
GB
United Kingdom
Prior art keywords
shaft
torsional oscillation
jan
stator
rotor
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
GB859/69A
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 GB1244251A publication Critical patent/GB1244251A/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
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/22—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection
    • B41J1/32—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection the plane of the type or die face being parallel to the axis of rotation, e.g. with type on the periphery of cylindrical carriers

Landscapes

  • Character Spaces And Line Spaces In Printers (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

1,244,251. Selective printing. INTERNATIONAL BUSINESS MACHINES CORP. 7 Jan., 1969 [15 Jan., 1968], No. 859/69. Heading B6F. A drum printer includes a shaft 10 driven continuously by a motor 12, a harmonic torsional oscillation being superimposed on the continuous drive so that a drum 28r rotates stepwise. The torsional oscillation is provided by a rotor 36 mounted on the shaft 10, and a stator 38, an alternating magnetic retarding and accelerating force being applied to the rotor. The alternating magnetic force is synchronized with the natural frequency of torsional oscillation of the shaft 10, the flux in the stator 38 being detected by a coil 42 and a point in the resulting waveform being measured and applied through transistorized control means to vary the torque output of the motor 12. The shaft 10 carries two print drums 28l, 28r each being attached to one end of the shaft 10 and the drive being applied to the centre of the shaft, the oscillations of the two halves of the shaft being 180 degrees out of phase to balance out torsional forces at the centre. Printing is effected by hammers 29 normally held against bias by springs 31 by means of a holding magnet 33, control magnets 27 being energized to oppose the holding magnet for impression action.
GB859/69A 1968-01-15 1969-01-07 Incremental drive apparatus Expired GB1244251A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69766268A 1968-01-15 1968-01-15

Publications (1)

Publication Number Publication Date
GB1244251A true GB1244251A (en) 1971-08-25

Family

ID=24802015

Family Applications (1)

Application Number Title Priority Date Filing Date
GB859/69A Expired GB1244251A (en) 1968-01-15 1969-01-07 Incremental drive apparatus

Country Status (4)

Country Link
US (1) US3505950A (en)
DE (1) DE1901227A1 (en)
FR (1) FR1604088A (en)
GB (1) GB1244251A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3654859A (en) * 1970-01-19 1972-04-11 Ncr Co Intermittent motion device for high-speed rotating print drums
US3731622A (en) * 1970-03-18 1973-05-08 California Electro Scient Intermittent type drum advancing means in a high speed printer
US3693545A (en) * 1970-09-18 1972-09-26 Burroughs Corp Coaxial type drums with apertures for changeable type segments
US3739720A (en) * 1970-10-06 1973-06-19 Electronic Data Preparation Co Method of selective high speed printing using letters with flared limbs and gaps to compensate for smearing
US3739252A (en) * 1971-10-12 1973-06-12 Ncr Torsional stepping motor and exciter apparatus therefor
JPS5839676B2 (en) * 1976-07-21 1983-08-31 エプソン株式会社 printing device
JPS5434652Y2 (en) * 1977-09-16 1979-10-23
US4297040A (en) * 1980-06-13 1981-10-27 Triumph-Werke Nurnberg A.G. Method and apparatus for positioning a type disc in a balanced force system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2627807A (en) * 1949-12-03 1953-02-10 Ibm Rotary selective printer
US2898537A (en) * 1953-07-21 1959-08-04 Philips Corp Arrangement for stabilizing the speed of a motor
US2919641A (en) * 1957-03-07 1960-01-05 Rca Corp Printing mechanism
US2940386A (en) * 1958-01-22 1960-06-14 Royal Mcbee Corp Wheel printers
US3049990A (en) * 1960-12-20 1962-08-21 Ibm Print hammer actuator
US3148497A (en) * 1961-06-01 1964-09-15 Cecil F Clifford Synchronised magnetic escapement
US3216348A (en) * 1961-10-20 1965-11-09 Clary Corp Hammer timing means in a high speed belt printer
US3312887A (en) * 1963-02-26 1967-04-04 Magnavox Co Speed control for electric motor

Also Published As

Publication number Publication date
US3505950A (en) 1970-04-14
FR1604088A (en) 1971-07-05
DE1901227A1 (en) 1969-09-04

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