US3921787A - High Speed type positioning mechanism - Google Patents

High Speed type positioning mechanism Download PDF

Info

Publication number
US3921787A
US3921787A US528470A US52847074A US3921787A US 3921787 A US3921787 A US 3921787A US 528470 A US528470 A US 528470A US 52847074 A US52847074 A US 52847074A US 3921787 A US3921787 A US 3921787A
Authority
US
United States
Prior art keywords
type
type head
shaft
spherical surface
head shaft
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
US528470A
Other languages
English (en)
Inventor
Bunzo Fujio
Yasushi Sasaki
Hiromi Takata
Syoji Yanagida
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.)
Yamura Shinko Seisakusho KK
Original Assignee
Yamura Shinko Seisakusho KK
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 Yamura Shinko Seisakusho KK filed Critical Yamura Shinko Seisakusho KK
Application granted granted Critical
Publication of US3921787A publication Critical patent/US3921787A/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
    • 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
    • B41J1/24—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 perpendicular to the axis of rotation
    • B41J1/26—Carriers moving for impression

Definitions

  • a high speed type element positioning mechanism has a type head member having therein a plurality of type elements and a type head shaft on which the type head is mounted.
  • the type head member has a spherical surface thereon through which the axis of the type 'head shaft extends, the type elements being mounted in the type head member with'tl'ie faces thereof on the spherical surface and movable in the type head member for being projected beyond the spherical surface.
  • the type elements lie along latitudinal circles on the surface the centers of which lie on the axis of the type head shaft, the type elements in adjacent latitudinal circles being substantially aligned along longitudinal circles extending from the point of intersection of the type head shaft axis and the spherical surface/The type head shaft is pivotally mounted for pivotal movement around a point corresponding to the center of the sphere of which the spherical surface forms a part,
  • a first drive means is coupled to the type head shaft for rotating the shaft in response to a signal corresponding to a character to be printed for rotating the type head member for aligning the type member corresponding to the character to be printed in a plane with the type hammer and the type head shaft
  • a second drive means is coupled to the type head shaft for pivoting the type head shaft in the plane for aligning a type element in one of the circles with the type hammer.
  • the present invention relates to high speed type ele'-. ment positioning mechanism for a teleprinter or a typewriter.
  • the pallet head Ina conventional type element positioning mecha-- nism, the pallet head, a typical example of which is shown in FIG. l, hasthe type elements I housed in the pallet P in rows the X and Y-directions, respectively, and when a certain type element is to be actuated to print the character thereon, the pallet P is'moved a certain distance in the X and Y directions, respectively, to
  • the type element is actuated in front of a type hammer 2, and the type hammer 2 isthen driven against the tail of the type element 1 instantaneously to type element to print a desired character.
  • the typeelement is returned to the position shown in FIG. I by a return spring which is spherical surface which, have the centers thereof on the compressed when the type elementisprojected;
  • the mechanism of the present invention has a pallet head, which was formerly box-shaped, which has a head member with a surface forming part of a sphere,
  • the type elements are positioned along the circumference of latitudinal circles and longitudinal circles on the spherical surface of this head member. That is rows of type elements are provided along the circumferences of circles at a plurality of radial positions.
  • a desired type element in the type head thus constructed is first moved toward the desired printing position .by' rotating the type head on the axis connecting the centers of the latitudinal circles formed by the rows of type elements and the geometrical center of the sphere. 'As a result,
  • each type element is moved along the circumference of V the latitudinal circle formed by a row of type elements to which the desired type element belongs.
  • the whole type head is moved in an arc in a plane'con- .taining the centers of said circles and the center of the sphere with the center of the sphere as the pivot point.
  • the two movements can coincide with each other. It is possible to use a servo motor or a stepping motor as a drive means for carrying out the two movements.
  • FIG. I is a schematic perspective view of a conventional pallet head for type elements
  • FIG. 2 is a plan view of an embodiment of the positioning mechanism of the present invention.
  • FIG. 3 is a side elevation, partly in section, of the mechanism of FIG. 2.
  • FIGS. 2 and 3 show the type positioning mechanism with rows of type elements 12 arranged in two circles o'nthe spherical surface of a head member 5, as 'de-' scribed above, and FIG. 3 is a partial sectional view of 5 the principal part of the head member.
  • the mechanism support 7 integrally formed as an extension on an or- -,direction', for instance a servo motor ora stepping mo-. tor, is provided, and the shaftthereof is connected to typefelements lie on latitudinal circles 0 c on the axis of rotation 6a of the type head shaft 6.
  • the individual typeelements in the respective latitudinal circles are also aligned along longitudinal circles extending along the spherical surface 5a from the point 6b at which the axis of the type head shaft 6 intersects the I surface 5a.
  • a return spring 13 is positioned around and hammer when it has been moved to the printing positype element to the initial position.
  • Carriage guides 15 and 16 are provided on the underframes along which the carriage 4 is movable.
  • a cam follower '17 is pivot ally mounted on the shaft support 7and.engages" an .ec.
  • the orthogonal driving and 'a gear mechanism whichtransmits the rotation of the drive shaft to the type head shaft 6 at a suitable speed ratio.
  • the motor 10 receives an electric signal corresponding to a character to be printed and is rotated through a suitable angle under the control of a conventional motor control circuit, the illustration of which is omitted.
  • the motor 10 transmits this rotation to the drive shaft 9 coupled directly thereto.
  • the rotation of the drive shaft 9 is transmitted to the type head shaft 6 through the orthogonal driving and transmitting mechanism 8, which is coupled to the drive shaft 9 by suitable means such as a spline. Accordingly, the type head member 5 fixed to the tip of the type head shaft 6 is rotated through a suitable angle to position the type element 12 in one of the latidudinal circles 0,, 0 etc.
  • a drive shaft 9 is rotatably mounted on the underframe of a printer oratype writer. selective driving motorlO for providing driving movement in the circumferential I the, drive ,shaft,' 9.
  • The'typeflelements 12 are arranged in the head member 5 with the faces thereof on thespherical surface '5a of a sphere and the rows of in engagement with each type element 12 and in engagement with the head element 5 and which is ordi-. narily in the expanded or relaxed state, as shown in. FIG. 3, When'the type element is struck by the type" tion, the spring is compressed, and acts to return the connecting mechanism 8 is composed of, for'instance,
  • the type hammer is driven by a commonly known drive circuit, the illustration of which is omitted, at a suitable time to strike the tail of the type element 12 thus positioned in alignment therewith.
  • the type element 12 which is struck is projected out of the type head member and the face thereof comes in contact with the ink ribbon or the like interposed between the face of the type element and a recording medium such as paper or the like to press the ribbon against the recording medium to'print the desired character on it.
  • the type hammer is returned to the initial position by a suitable means and the type element 12 is also returned to the position shown in FIG. 3 by the restoring force of the return spring 13.
  • a disc or the like for detecting an angular position can be provided on the type head shaft 6 or the drive shaft 9 for confirmation or detection of type positioning action,
  • the carriage 4 is moved along the carriage guides 15 and 16 by a commonly known means and stands ready for the next printing action at a new printing position on the record ing medium.
  • a type head member on which type elements are arranged in a plurality of latitudinal circles and a plurality of longitudinal circles and so that the faces thereof lie on a spherical surface, and this type head member is rotatably supported on type head shaft and the type head shaft is oscillatably mounted on a drive shaft as the pivot, thereby making it possible to position a type element by rotation and/or oscillation simultaneously with each other and, also making it possible to use a servomotor or a stepping motor as a drive source for these two movements.
  • the advantage of the above described invention is that the type positioning mechanism has a simple construction and is stable at high speed.
  • a type head member having therein a plurality of type elements, a type head shaft on which said type head is mounted, the type head member having a spherical surface thereonthrough which the axis of said i type head shaft extends, said type elements being mounted in said type head member with the faces thereof on said spherical surface and movable in said type head member for being projected beyond said spherical surface, said type elements lying along latitudinal circles on said surface the centers of which lie on the axis of said type head shaft, the type elements in adjacent latitudinal circles being substantially aligned along longitudinal circles extending from the pointof intersection of said type head shaft axis and said spherical surface, said type head shaft being pivotally mounted for pivotal movement around a point corresponding to the center of the sphere of which said the type member corresponding to the character to be' printed in the plane with said type hammer, and a second drive means coupled to said type head shaft for pivoting said type head shaft in said plane for

Landscapes

  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
US528470A 1973-12-03 1974-11-29 High Speed type positioning mechanism Expired - Lifetime US3921787A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47065739A JPS5228051B2 (enrdf_load_html_response) 1973-12-03 1973-12-03

Publications (1)

Publication Number Publication Date
US3921787A true US3921787A (en) 1975-11-25

Family

ID=15172885

Family Applications (1)

Application Number Title Priority Date Filing Date
US528470A Expired - Lifetime US3921787A (en) 1973-12-03 1974-11-29 High Speed type positioning mechanism

Country Status (2)

Country Link
US (1) US3921787A (enrdf_load_html_response)
JP (1) JPS5228051B2 (enrdf_load_html_response)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063630A (en) * 1976-06-25 1977-12-20 International Business Machines Corporation Typewriter impact position adjustment mechanism
US4106611A (en) * 1974-12-28 1978-08-15 Ricoh Company, Ltd. Serial printing apparatus
US4382703A (en) * 1982-04-19 1983-05-10 Xerox Corporation Print element shifter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5125030A (en) * 1974-08-26 1976-03-01 Nippon Telegraph & Telephone Purintano injisochi
JPS52151806U (enrdf_load_html_response) * 1976-05-14 1977-11-17

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838156A (en) * 1954-05-03 1958-06-10 Griffith Ronald George Type carrier for telegraph type printing apparatus
US3295652A (en) * 1964-03-25 1967-01-03 Oki Electric Ind Co Ltd Type drum selector using sliding plates
US3397766A (en) * 1966-03-01 1968-08-20 Hasler Ag Printer having plural hammers and a single hammer actuating means
US3493090A (en) * 1968-02-26 1970-02-03 Burroughs Corp Mechanism for connecting a rotatable printing head to a character selection device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838156A (en) * 1954-05-03 1958-06-10 Griffith Ronald George Type carrier for telegraph type printing apparatus
US3295652A (en) * 1964-03-25 1967-01-03 Oki Electric Ind Co Ltd Type drum selector using sliding plates
US3397766A (en) * 1966-03-01 1968-08-20 Hasler Ag Printer having plural hammers and a single hammer actuating means
US3493090A (en) * 1968-02-26 1970-02-03 Burroughs Corp Mechanism for connecting a rotatable printing head to a character selection device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106611A (en) * 1974-12-28 1978-08-15 Ricoh Company, Ltd. Serial printing apparatus
US4063630A (en) * 1976-06-25 1977-12-20 International Business Machines Corporation Typewriter impact position adjustment mechanism
US4382703A (en) * 1982-04-19 1983-05-10 Xerox Corporation Print element shifter

Also Published As

Publication number Publication date
JPS5228051B2 (enrdf_load_html_response) 1977-07-23
JPS5085418A (enrdf_load_html_response) 1975-07-10

Similar Documents

Publication Publication Date Title
US4106611A (en) Serial printing apparatus
US3209681A (en) Rotary print head with selective character forming dies
US2895584A (en) Single element printing head
US3921787A (en) High Speed type positioning mechanism
US4126400A (en) Serial printing apparatus
US3420350A (en) Type head driving means employing flexible belt
US3773161A (en) High speed serial printer with plural hammers
EP0145025B1 (en) Multihead serial printer
US4457738A (en) Anti-backlash double universal flexible coupling
US3422945A (en) Printing machine character selection structure employing differential means
CA1079669A (en) Cup printer
US4069907A (en) High speed printer having spokes with a plurality of sections connected together at an angle greater than zero
US3991872A (en) Type element mounting for high speed type positioning mechanism
US3896919A (en) Double band type carrier
US3776340A (en) Recording instrument with mosaic printing head
US3739897A (en) Internal actuator for impacting a serial printer print head
US3085504A (en) Printing apparatus
USRE28796E (en) Compact flying printer
JPS5934504B2 (ja) タイプホイ−ル
JPH01271263A (ja) ペン型プリンタ装置
US3949664A (en) Compact flying printer
CA1046005A (en) Single element printer
JP2511079B2 (ja) プリンタの活字位置検出装置
JPS59156770A (ja) インパクト型プリンタ
SU770846A1 (ru) Печатный механизм устройства дл выборочного печатани