FR2440834A1 - Electromagnetic actuator for needle printers - has combined solenoid and permanent magnet to provide increased operational speed - Google Patents

Electromagnetic actuator for needle printers - has combined solenoid and permanent magnet to provide increased operational speed

Info

Publication number
FR2440834A1
FR2440834A1 FR7926371A FR7926371A FR2440834A1 FR 2440834 A1 FR2440834 A1 FR 2440834A1 FR 7926371 A FR7926371 A FR 7926371A FR 7926371 A FR7926371 A FR 7926371A FR 2440834 A1 FR2440834 A1 FR 2440834A1
Authority
FR
France
Prior art keywords
needle
permanent magnet
impact
electromagnetic actuator
provide increased
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.)
Withdrawn
Application number
FR7926371A
Other languages
French (fr)
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.)
Seitz AG
Original Assignee
Seitz 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 Seitz AG filed Critical Seitz AG
Publication of FR2440834A1 publication Critical patent/FR2440834A1/en
Withdrawn legal-status Critical Current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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/27—Actuators for print wires
    • B41J2/285—Actuators for print wires of plunger type

Landscapes

  • Impact Printers (AREA)
  • Electromagnets (AREA)

Abstract

A high speed character printer is based upon a line of magnetically actuated printing needles. It is intended that a printing rate of 500 characters per second is achieved. The needle impact actuator has an annular ring of permanent magnetic material with two actuator coils located on either side within a cylindrical housing. The end of the needle is inset into a plug of soft iron. Support for the needle is provided by a tube of hard material, e.g. a suitable sintered metal. When the drive spool causing impact is energised the nett effect of the permanent magnet is to cause reinforcement of the magnetic field. A similar effect is observed in relation to the return action coil. As a result the needle is continuously accelerated and the impact rate is increased by a considerable factor over known devices.
FR7926371A 1978-11-09 1979-10-24 Electromagnetic actuator for needle printers - has combined solenoid and permanent magnet to provide increased operational speed Withdrawn FR2440834A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1152778 1978-11-09

Publications (1)

Publication Number Publication Date
FR2440834A1 true FR2440834A1 (en) 1980-06-06

Family

ID=4374362

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7926371A Withdrawn FR2440834A1 (en) 1978-11-09 1979-10-24 Electromagnetic actuator for needle printers - has combined solenoid and permanent magnet to provide increased operational speed

Country Status (3)

Country Link
JP (1) JPS5567485A (en)
DE (1) DE2939829A1 (en)
FR (1) FR2440834A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3267952D1 (en) * 1981-03-21 1986-01-30 Vacuumschmelze Gmbh Magnetic drive system for producing linear movements
DE3244936A1 (en) * 1982-12-04 1984-06-07 Olympia Werke Ag, 2940 Wilhelmshaven TYPE DISCOUNTING SYSTEM OF A WRITING OR SIMILAR MACHINE
DE3825240A1 (en) * 1988-07-25 1990-02-01 Siemens Ag Needle printhead having a plunger-type armature magnet
ATE549561T1 (en) * 2004-07-05 2012-03-15 Cameron Int Corp SLIDE CONTROL DEVICE AND DRIVE DEVICE FOR USE THEREOF

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2228619A1 (en) * 1973-05-10 1974-12-06 Lrc Inc

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2228619A1 (en) * 1973-05-10 1974-12-06 Lrc Inc

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/78 *

Also Published As

Publication number Publication date
DE2939829A1 (en) 1980-05-22
JPS5567485A (en) 1980-05-21

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Legal Events

Date Code Title Description
ST Notification of lapse