US3775714A - Electromagnetic drive for data indication - Google Patents

Electromagnetic drive for data indication Download PDF

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Publication number
US3775714A
US3775714A US00159782A US3775714DA US3775714A US 3775714 A US3775714 A US 3775714A US 00159782 A US00159782 A US 00159782A US 3775714D A US3775714D A US 3775714DA US 3775714 A US3775714 A US 3775714A
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US
United States
Prior art keywords
plunger
electromagnetic drive
indicating means
drive according
core portion
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
US00159782A
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English (en)
Inventor
H Heuer
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.)
Anker Werke AG
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Anker Werke AG
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Filing date
Publication date
Application filed by Anker Werke AG filed Critical Anker Werke AG
Application granted granted Critical
Publication of US3775714A publication Critical patent/US3775714A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H01F7/1615—Armatures or stationary parts of magnetic circuit having permanent magnet
    • 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
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • 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
    • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
    • H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets

Definitions

  • Electromagnetic'drive fordata indication includes a shell core-like magnet core, an excitation coil surrounding the magnet core, the magnet core having an inner sleeve-shaped core portion extending through the excitation coil, the inner core portion being formed with an air gap separating the inner coreportion into two parts eachformed with a magnetic pole, indicating means, and a plunger polarized in longitudinal direction thereof operatively connected to the indicating means, the plunger being freely displaceably disposed within the sleeve-shaped inner core portion and being displaceable from a neutral position thereof to a position wherein the indicating means are effective to provide an indication.
  • the invention relates to electromagnetic drive for data indication wherein indicating means are transferred by a plunger from neutral position thereof to indicating position thereof.
  • electromagnetic drive for data indication comprising a shell'core-like magnet core, an excitation coil surrounding'themagnet core, the magnet core having aninner sleeve-shaped core portion extending through the'excitation coil, the inner core portion being formed with an air gap separating the inner core portion into two parts each formed with a magnetic pole, indicating means, and a plunger polarized in longitudinal direction thereof operatively connected to the indicating means, the plunger being freely displaceably disposedwithin the sleev'e shaped inner core portion and being displaceable'from a neutral position thereof to a position wherein the indicating means are effective to provide an indication.
  • the length of the sleeve-shaped core portion has a length which is a multipie of the length-of the plunger
  • the air gap is located in the'middleof the coil so that the plunger, as viewed in direction of displacement by both of the magnet poles-indicating position of the plunger.
  • FIGS. 1 through 3 are diagrammatic longitudinal sectional views of the electromagnetic drive for data indi-' cation according to the invention shown in three different phases, namely in neutral or ofi-position, in indicating position, and after data indication, respectively;
  • FIGS. 4 and 5 are diagrams of circuits for triggering the electromagnetic drive; and I FIG. 6 is a longitudinal sectional view of an actual embodiment of the electromagnetic drive of the invention.
  • the core part 7 passing through the interior of the coil is of sleeve-like construction and ,has an air gap 4 in the center of the coil so that two magnetic poles 5 and 6 are formed, respectively, having effective pole ends shaped conically on the exterior. thereof for the" purpose of avoiding unnecessary leakage losses.
  • a plunger 8 polarized in longitudinal direction is freely displaceably disposed, indicating means 9 in the form of a printing wire being secured thereto.
  • the plunger 8, in the-phase illustrated in FIG. 1, is in neutral position, as indicated by the fact that no current is shown traversing themagnet coil 3,
  • a stop 10 of non-magnetic material serves as a positionsecuring device for the plunger 8 and is provided with a ventilation or air hole 11 to avoid air damping.
  • An indication carrier represented diagrammatically by the line 12, against which the printing wire 9, connected to thereof, is surrounded entirely or partly" by one of the the plunger 8, directly strikes.
  • the polarized plunger 8 is located in the air gap 4 between the magnet poles 5 and 6 where it is equally surrounded by both of the magnet poles 5 and 6 so that a'closed magnetic circuit is formed, the magnetic field produced by theexcitation coil 3 being represented. by the dotted line, as shown.
  • FIG. 4 shows the aforementioned excitation coil 3 having one terminal thereof connected through a capacitance l3 and a selector switch 15 to a reference voltage source V, and the other terminal thereof through a series resistance 16 to a positive voltage +U. Furthermore, a discharge resistor 14 is provided which, upon reversing the switch 15, is connected in parallel with the series connection formed by the excitation coil 3 and the capacitance 13. The position of the selector switch 15 shown in FIG. 4 corresponds to the neutral position of the plunger 8 in the phase illustrated in FIG. 1. The capacitance 13 is charged, and no current flows through .the excitation coil 3.
  • the charging time depends upon the dimensioning or rating of the series resistance 16 and the excitation coil 3.
  • the position of the selector switch 15 is varied so that the capacitance l3 discharges through the discharge resistance. 14.
  • the discharge current consequently flowing through the excitation coil 3 produces a' magnetic field (note FIG. 2) which transfers the plunger 8 rapidly into the indicating position thereof.
  • Resetting of the selector switch 15 to the original position thereof shown in FIG. 4 results in renewed charging of the capacitance 13 with opposing current direction (note FIG. 3) so that the plunger 8 rapidly returns to the neutral position thereof shown in FIG. 1.
  • the circuit diagrammatically shown in FIG. corresponds in construction to that shown in FIG. 4, with the difference, however, that the selector switch of FIG. 4 is replaced by two transistors 15a and 15b in FIG. 5.
  • the pulse diagrams shown in FIG. 5 at the bases of the transistors 15a and 15b indicatethat in neutral position of the plunger 8 the transistor 15a is conductive and the transistor 15b is blocked. Further discussion regarding the triggering or control of the transistor 15a and 15b will not be made herein since it can be carried out in any conventional manner known to the man of ordinary skill in the art.
  • thecircuit' shown in F IG. 5 npn transistors are used,. however the circuit can be suitably adapted .for pnp transistors.
  • FIG. 6 there is shown in longitudinal section, the actual structure of the electromagnetic drive.20 of the invention which has been shown diagrammatically in FIGS. 1 to 3.
  • An excitation coil 21 is mounted on a cylindrical coil form 22 which is carried by two flanges 23 and 24 having, respectively, a sleeve-like extension 26,
  • a plunger 27 as aforedescribed with respect to FIGS. 1 to 3, is polarized in longitudinal direction thereof and is of tubular construction.
  • Guide flanges 28 and 29 are constructed with the end facesof the-polarized plunger 27. They are made of non-magnetic material and are formed with recesses 30 and 31 extending in the direction of displacement of the plunger 27, for reducing the mass of the flanges 28 and 29.
  • the plunger 27 is freely displaceably disposed within the sleeve-like extensions 25 and 26 of the respective flanges '23 and24."As location- 'securing device for the plunger '27 in theneutr'al'p'osition thereof, a stop 32 formed with an air hole 33 is the invention in a non-illustrated carrier part, the
  • the outer magnetic return leg of the magnet system is formed by a sleeve 39 that is slid over the excitation coil 21 and is connected, for example, to both flanges 23 and 24 respectively having the extensions 26 and 25, and provides a shell core-like shape to the magnet core constructed of these components.
  • the sleeve 39. forming the outer leg of the magnetic circuit is located between the two flanges 23 and 24.
  • a close magnetic force lock can be produced by rolling and flanging the outer magneticreturn-,leg, so-that the sleeve 39 surrounds both flanges 23 and 24.
  • the indicat ing means 38 is constructed as a.printing wire, so that when a number of these electromagnetic drives 20 are combined into one unit, there results, for, example, a complete wire printing mechanism.
  • the structure of the indicating means 38 can obviously also be needle or hammer-shaped so that the aforedescribed embodiment of the electromagnetic drive 20 is capable of being used as well for conventional needle printers or fast printers.
  • the advantages attained by the invention are especially that,-'due to the very small mass being displaced, a high indicating speed is attained,and this indicating speed, because no increasing counter-force, such as for a spring, need be overcome, is very rapidly achieved.
  • Electromagnetic drive for data indication comprising a shell core-like magnetic core, an excitation coil surrounding said magnet core, said magnet core having an inner sleeve-shaped core portion extending through said excitation coil, said inner core portion being formed with an air gap separating said inner core portion into two parts each formed with a magnetic pole, indicating means, and a plunger polarized in longitudinal direction thereof operatively connected to said indicatingmeans, said plungerbein'g freely displaceably disposed within said sleeve-shaped inner core portion and being displaceable from a neutral position thereof to a position wherein said indicating means are effective to provide an indication.
  • Electromagnetic drive according to claim 3 wherein the magnetic poles of said magnet core are polarizable, in one indicating operation, so that transfer of said plunger into both the positions thereof wherein said indicating means are effective, as well as into said neutral position thereof, is accelerated.
  • Electromagnetic drive according to claim 4 includ ing means for producing an outer magnetic field in given direction in said plunger and means for producing with said excitation coil a magnetic field in direction opposite to said given direction for transferring said'plunger from neutral position thereof to the position thereof wherein said indicating means are effec- 6.
  • Electromagnetic drive according to claim 1 including adjustable stop means disposed in one of said sleeve-shaped core positions for adjusting the neutral position of said plunger.
  • Electromagnetic drive according to claim 1 wherein said plunger comprises a member of tubular construction and a pair of guide flanges located respectively at opposite ends of said member, one of said guide flanges facing in direction toward said position of said plunger wherein said indicating means are effective, said one guide flange being connected to said indicating means.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Impact Printers (AREA)
US00159782A 1970-07-06 1971-07-06 Electromagnetic drive for data indication Expired - Lifetime US3775714A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702033378 DE2033378B2 (de) 1970-07-06 1970-07-06 Elektromagnetischer antrieb zur datenaufzeichnung

Publications (1)

Publication Number Publication Date
US3775714A true US3775714A (en) 1973-11-27

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ID=5775912

Family Applications (1)

Application Number Title Priority Date Filing Date
US00159782A Expired - Lifetime US3775714A (en) 1970-07-06 1971-07-06 Electromagnetic drive for data indication

Country Status (5)

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US (1) US3775714A (xx)
DE (1) DE2033378B2 (xx)
FR (1) FR2101538A5 (xx)
GB (1) GB1347854A (xx)
SE (1) SE361758B (xx)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892175A (en) * 1972-06-23 1975-07-01 Kienzle Apparate Gmbh Printing needle drive
US3946851A (en) * 1972-02-18 1976-03-30 Burroughs Corporation Electromagnetic assembly for actuating a stylus in a wire printer
US4023130A (en) * 1974-04-30 1977-05-10 Strathearn Audio Limited Pivoted arm control arrangements
US4034841A (en) * 1974-10-23 1977-07-12 Nippon Electric Co., Ltd. Print wire actuating device for a dot matrix printer
US4044878A (en) * 1975-06-18 1977-08-30 U.S. Philips Corporation Matrix printer head having a removable assembly
US4259653A (en) * 1977-11-22 1981-03-31 Magnetic Laboratories, Inc. Electromagnetic reciprocating linear actuator with permanent magnet armature
US4306207A (en) * 1980-05-07 1981-12-15 Hosiden Electronics Co., Ltd. Self-sustaining solenoid
US4493253A (en) * 1983-11-23 1985-01-15 Ncr Canada Ltd. Variable impact printing means
US4494098A (en) * 1983-01-07 1985-01-15 Aisin Seiki Kabushiki Kaisha Solenoid device
US4835503A (en) * 1986-03-20 1989-05-30 South Bend Controls, Inc. Linear proportional solenoid
DE3152049C2 (xx) * 1980-06-09 1993-01-07 Lucas Ledex, Inc., Vandalia, Ohio, Us
US5497135A (en) * 1993-03-31 1996-03-05 Harald Schrott Bistable electromagnet, particularly an electromagnetic valve
US20060038644A1 (en) * 2004-08-19 2006-02-23 Remy Inc. Moisture exhausting membrane in electrical solenoid
US20070109083A1 (en) * 2005-10-19 2007-05-17 Michael Dettmers Housing cover for switching solenoid housing
EP1860669A1 (en) * 2006-05-23 2007-11-28 LIU, Ming-Hwa Current-controlled/driven compensating/strengthening device
US20130241680A1 (en) * 2012-03-19 2013-09-19 Hanchett Entry Systems, Inc. Springless electromagnet actuator having a mode selectable magnetic armature
US11398332B2 (en) * 2017-07-26 2022-07-26 Mitsubishi Electric Corporation Electromagnetic actuator and hydraulic pressure adjustment mechanism

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4883736A (xx) * 1972-02-08 1973-11-08
DE2640612C3 (de) * 1976-09-09 1982-01-21 Siemens AG, 1000 Berlin und 8000 München Tauchankermagnetsystem und Verfahren zu dessen Herstellung
US4162131A (en) * 1977-11-02 1979-07-24 General Electric Company Drive circuit for printing head
JPS602994B2 (ja) * 1978-12-23 1985-01-25 キヤノン株式会社 プリンタ
JPS5624182A (en) * 1979-08-02 1981-03-07 Canon Inc Printer
GB2165096B (en) * 1984-03-05 1987-12-31 Mitsubishi Mining & Cement Co Electromagnetic actuator apparatus
DE3825240A1 (de) * 1988-07-25 1990-02-01 Siemens Ag Nadeldruckkopf mit tauchankermagnet
US5272458A (en) * 1988-07-28 1993-12-21 H-U Development Corporation Solenoid actuator
IL91041A0 (en) * 1988-07-28 1990-02-09 H U Dev Corp Solenoid actuator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749453A (en) * 1952-04-30 1956-06-05 Reeve Electrical Co Inc Electric bell motor
US3126501A (en) * 1964-03-24 Flora
US3202886A (en) * 1962-01-11 1965-08-24 Bulova Watch Co Inc Bistable solenoid
GB1136418A (en) * 1966-12-07 1968-12-11 Plessey Co Ltd Improvements in or relating to electrical solenoid devices

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126501A (en) * 1964-03-24 Flora
US2749453A (en) * 1952-04-30 1956-06-05 Reeve Electrical Co Inc Electric bell motor
US3202886A (en) * 1962-01-11 1965-08-24 Bulova Watch Co Inc Bistable solenoid
GB1136418A (en) * 1966-12-07 1968-12-11 Plessey Co Ltd Improvements in or relating to electrical solenoid devices

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946851A (en) * 1972-02-18 1976-03-30 Burroughs Corporation Electromagnetic assembly for actuating a stylus in a wire printer
US3892175A (en) * 1972-06-23 1975-07-01 Kienzle Apparate Gmbh Printing needle drive
US4023130A (en) * 1974-04-30 1977-05-10 Strathearn Audio Limited Pivoted arm control arrangements
US4034841A (en) * 1974-10-23 1977-07-12 Nippon Electric Co., Ltd. Print wire actuating device for a dot matrix printer
US4044878A (en) * 1975-06-18 1977-08-30 U.S. Philips Corporation Matrix printer head having a removable assembly
US4259653A (en) * 1977-11-22 1981-03-31 Magnetic Laboratories, Inc. Electromagnetic reciprocating linear actuator with permanent magnet armature
US4306207A (en) * 1980-05-07 1981-12-15 Hosiden Electronics Co., Ltd. Self-sustaining solenoid
DE3152049C2 (xx) * 1980-06-09 1993-01-07 Lucas Ledex, Inc., Vandalia, Ohio, Us
US4494098A (en) * 1983-01-07 1985-01-15 Aisin Seiki Kabushiki Kaisha Solenoid device
US4493253A (en) * 1983-11-23 1985-01-15 Ncr Canada Ltd. Variable impact printing means
US4835503A (en) * 1986-03-20 1989-05-30 South Bend Controls, Inc. Linear proportional solenoid
US5497135A (en) * 1993-03-31 1996-03-05 Harald Schrott Bistable electromagnet, particularly an electromagnetic valve
US7525404B2 (en) * 2004-08-19 2009-04-28 Remy Inc. Moisture exhausting membrane in electrical solenoid
US20060038644A1 (en) * 2004-08-19 2006-02-23 Remy Inc. Moisture exhausting membrane in electrical solenoid
US20070109083A1 (en) * 2005-10-19 2007-05-17 Michael Dettmers Housing cover for switching solenoid housing
US7489216B2 (en) * 2005-10-19 2009-02-10 Dbt Gmbh Housing cover for switching solenoid housing
EP1860669A1 (en) * 2006-05-23 2007-11-28 LIU, Ming-Hwa Current-controlled/driven compensating/strengthening device
US20130241680A1 (en) * 2012-03-19 2013-09-19 Hanchett Entry Systems, Inc. Springless electromagnet actuator having a mode selectable magnetic armature
CN103325519A (zh) * 2012-03-19 2013-09-25 汉切特录入系统股份有限公司 具有模式可选的磁性电枢的无弹簧电磁致动器
US9183976B2 (en) * 2012-03-19 2015-11-10 Hanchett Entry Systems, Inc. Springless electromagnet actuator having a mode selectable magnetic armature
US9449747B2 (en) 2012-03-19 2016-09-20 Hanchett Entry Systems, Inc. Springless electromagnet actuator having a mode selectable magnetic armature
US11398332B2 (en) * 2017-07-26 2022-07-26 Mitsubishi Electric Corporation Electromagnetic actuator and hydraulic pressure adjustment mechanism

Also Published As

Publication number Publication date
FR2101538A5 (xx) 1972-03-31
DE2033378A1 (de) 1972-01-20
SE361758B (xx) 1973-11-12
DE2033378B2 (de) 1976-08-05
GB1347854A (en) 1974-02-27

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