US3455237A - Cycloidal motion producing means for printing wheels in high speed printers - Google Patents

Cycloidal motion producing means for printing wheels in high speed printers Download PDF

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Publication number
US3455237A
US3455237A US704077A US3455237DA US3455237A US 3455237 A US3455237 A US 3455237A US 704077 A US704077 A US 704077A US 3455237D A US3455237D A US 3455237DA US 3455237 A US3455237 A US 3455237A
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US
United States
Prior art keywords
hub
housing
high speed
ring
pin
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
US704077A
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English (en)
Inventor
Abdulrahim Cheikh Trab
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.)
Olympia Werke AG
Original Assignee
Olympia Werke AG
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 Olympia Werke AG filed Critical Olympia Werke AG
Application granted granted Critical
Publication of US3455237A publication Critical patent/US3455237A/en
Anticipated expiration legal-status Critical
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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
    • B41J7/00—Type-selecting or type-actuating mechanisms
    • B41J7/36—Selecting arrangements applied to type-carriers rotating during impression
    • B41J7/46—Rolling contact during impression
    • 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
    • B41J7/00—Type-selecting or type-actuating mechanisms
    • B41J7/48—Type carrier arrested in selected position by electromagnetic means

Definitions

  • My present invention relates to a high-speed printer as used, for example, in data-processing equipment to record numerical information in a multiplicity of digital columns.
  • Patent A more particular object of this invention is to provide means in such system for the selection of a desired type face with the aid of a continuously operating planetary-gear drive.
  • a generally cylindrical housing surrounding one or more printing wheels each having a hub centered on the housing axis and an annular member surrounding this hub with radial clearance, this annular member being normally centered with reference to the housing and being held on its hub by a coupling mechanism releasably connecting the annular member with the hub for joint rotation.
  • a thrust means mounted on the hub such as a radially extending pin forming part of the coupling mechanism, is actuatable in selected angular positions of the printing wheel to push its annular member radially outwardly into an off-center position in which a set of fixed gear teeth on the inner housing periphery are engaged by coacting gear teeth on the annular member so that the latter rolls on the inner housing wall toward a lateral slot in that wall confronting an external printing platen.
  • any one of a set of type faces on the annular printing member projects outwardly through the slot to contact the platen with a cycloidal motion whereby the character represented by a type face isp'r'inted on an interposed sheet.
  • the annular member Upon continuing rotation of the wheel hub about the housing axis, the annular member is restored to its centered position on the hub, advantageously by camming engagement with a formation on that member which returns the thrust means to an inoperative position after the cycloidal motion has carried the selected type face past the printing point at the lateral housing slot.
  • the annular member of each digit wheel is a ring with a noncircular inner periphery forming a pair of diametrically opposite recesses and a pair of adjoining ridges also offset by Normally, this ring is held centered on the hub by the aforementioned thrust pin engaging in one of these recesses while a more weakly biased balancing pin is received in the opposite recess.
  • a suitable detent advantageously an annular clip encircling the hub, locks the thrust pin against radially'outward displacement by its relatively strong biasing force, the ring then rotating in unison with its hub while being disengaged from the gear teeth of the stationary housing.
  • a printing wheel in said housing having a hub centered on said axis, said wheel comprising an annular member surrounding said hub with radial clearance, a set of type faces on said member sequentially alignable with said slot and coupling means releasably entraining said member for rotation about said axis with freedom of radial motion of said member between a centered position and an off-center position;
  • actuating means for said thrust means operable in different angular positions of said hub for selectively aligning any of said type faces with said slot upon said member rolling on said inner periphery, the type face so aligned projecting outwardly through said slot with a cycloidal motion in the off-center position of said member;
  • said coupling means comprises a radially movable element on said hub bearing upon said member, said thrust means including resilient biasing means urging said element radially outwardly, said hub being provided with detent means normally locking said element against outward movement but disengageable from said element by said actuating means.
  • said restoring means comprises a camming formation on said member urging said element inwardly for re-enga'gement by said detent means in a predetermined relative angular position of said hub and said member.
  • said biasing means includes a pair of springs exerting pressure upon said first pin and said balancing means includes one of said springs exerting pressure upon said second pin, said first pin being provided with a lateral notch and said detent means including an annular clip encircling said hub, the otherof said springs being coupled with said clip for maintaining an edge thereof engaged in said notch.
  • said detent means includes an annular clip encircling said hub in nonlocking relationship with said second pin, said clip having an edge confronting said notch and being spring-loaded in the direction of hub rotation for engagement of said edge in said notch, said clip being provided with a projection and said actuating means comprising an abutment movably mounted on said housing for interposition in the path of said projection to draw edge from said notch.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Retarders (AREA)
  • Labeling Devices (AREA)
  • Handling Of Sheets (AREA)
  • Friction Gearing (AREA)
US704077A 1967-02-09 1968-02-08 Cycloidal motion producing means for printing wheels in high speed printers Expired - Lifetime US3455237A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO0012288 1967-02-09

Publications (1)

Publication Number Publication Date
US3455237A true US3455237A (en) 1969-07-15

Family

ID=7352698

Family Applications (1)

Application Number Title Priority Date Filing Date
US704077A Expired - Lifetime US3455237A (en) 1967-02-09 1968-02-08 Cycloidal motion producing means for printing wheels in high speed printers

Country Status (5)

Country Link
US (1) US3455237A (pl)
BE (1) BE709708A (pl)
CH (1) CH457929A (pl)
FR (1) FR1547903A (pl)
GB (1) GB1213007A (pl)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618513A (en) * 1968-12-20 1971-11-09 Olympia Werke Ag Printing mechanism including resiliently biased rotatable-type wheels
US3683800A (en) * 1969-06-27 1972-08-15 Olivetti & Co Spa Serial printing mechanism
US4140055A (en) * 1976-06-09 1979-02-20 Societe d'Etude et de Construction d-Appareils de Precision (S.E.C.A.P.) Automatic device for the value-setting of printing wheels in a franking machine
US4386562A (en) * 1980-03-31 1983-06-07 Ncr Canada Ltd - Ncr Canada Ltee Bar code printer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2858536A (en) * 1954-05-13 1958-10-28 Ca Nat Research Council Type actuating means in high speed printers
US2910936A (en) * 1959-01-19 1959-11-03 Clary Corp Printer mechanism
US2915968A (en) * 1958-10-30 1959-12-08 Clary Corp Printer
US3037447A (en) * 1961-01-10 1962-06-05 Burroughs Corp Printing apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2858536A (en) * 1954-05-13 1958-10-28 Ca Nat Research Council Type actuating means in high speed printers
US2915968A (en) * 1958-10-30 1959-12-08 Clary Corp Printer
US2910936A (en) * 1959-01-19 1959-11-03 Clary Corp Printer mechanism
US3037447A (en) * 1961-01-10 1962-06-05 Burroughs Corp Printing apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618513A (en) * 1968-12-20 1971-11-09 Olympia Werke Ag Printing mechanism including resiliently biased rotatable-type wheels
US3683800A (en) * 1969-06-27 1972-08-15 Olivetti & Co Spa Serial printing mechanism
US4140055A (en) * 1976-06-09 1979-02-20 Societe d'Etude et de Construction d-Appareils de Precision (S.E.C.A.P.) Automatic device for the value-setting of printing wheels in a franking machine
US4386562A (en) * 1980-03-31 1983-06-07 Ncr Canada Ltd - Ncr Canada Ltee Bar code printer

Also Published As

Publication number Publication date
DE1549822B2 (de) 1972-07-06
FR1547903A (fr) 1968-11-29
BE709708A (pl) 1968-05-30
DE1549822A1 (de) 1970-12-17
GB1213007A (en) 1970-11-18
CH457929A (de) 1968-06-15

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