GB1437929A - Print hammer assembly - Google Patents

Print hammer assembly

Info

Publication number
GB1437929A
GB1437929A GB4035074A GB4035074A GB1437929A GB 1437929 A GB1437929 A GB 1437929A GB 4035074 A GB4035074 A GB 4035074A GB 4035074 A GB4035074 A GB 4035074A GB 1437929 A GB1437929 A GB 1437929A
Authority
GB
United Kingdom
Prior art keywords
hammer
flux
coil
generated
coils
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
GB4035074A
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 GB1437929A publication Critical patent/GB1437929A/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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/26—Means for operating hammers to effect impression
    • B41J9/36—Means for operating hammers to effect impression in which mechanical power is applied under electromagnetic control
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/064—Circuit arrangements for actuating electromagnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Impact Printers (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

1437929 Selective printing INTERNATIONAL BUSINESS MACHINES CORP 17 Sept 1974 [15 Oct 1973] 40350/74 Heading B6F Electromagnetic print hammer assembly has a common core 3, 5 and individual portions 7 associated with each hammer 9. A holding flux is generated by coil 11 or a permanent magnet (not shown) to retain the hammers. A backing flux is generated by individual cores 13 on the portions 7 to oppose the holding flux and release the hammer 9. A compensating flux, proportional to the total instantaneous bucking flux in the whole assembly is generated by coil 27 to counteract back-induced voltages in the coils 11, 13 caused by their energization. The coils 13 may be in parallel to each other and in series with the coil 27. Flexural elements 19, 21 support and impel each hammer 9. Flight time of each hammer 9 can be adjusted by screw 25 acting on spring 23.
GB4035074A 1973-10-15 1974-09-17 Print hammer assembly Expired GB1437929A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00406722A US3833870A (en) 1973-10-15 1973-10-15 Print hammer firing circuit

Publications (1)

Publication Number Publication Date
GB1437929A true GB1437929A (en) 1976-06-03

Family

ID=23609186

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4035074A Expired GB1437929A (en) 1973-10-15 1974-09-17 Print hammer assembly

Country Status (5)

Country Link
US (1) US3833870A (en)
JP (1) JPS5068232A (en)
DE (1) DE2446741A1 (en)
FR (1) FR2247352B1 (en)
GB (1) GB1437929A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2703788C3 (en) * 1977-01-29 1979-10-04 Elektro-Mechanik Gmbh, 5963 Wenden Torque motor

Also Published As

Publication number Publication date
FR2247352B1 (en) 1977-11-04
FR2247352A1 (en) 1975-05-09
DE2446741A1 (en) 1975-04-17
US3833870A (en) 1974-09-03
JPS5068232A (en) 1975-06-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee