US3548353A - Actuating magnet of flat construction - Google Patents

Actuating magnet of flat construction Download PDF

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Publication number
US3548353A
US3548353A US751869A US3548353DA US3548353A US 3548353 A US3548353 A US 3548353A US 751869 A US751869 A US 751869A US 3548353D A US3548353D A US 3548353DA US 3548353 A US3548353 A US 3548353A
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US
United States
Prior art keywords
armature
magnet
core
actuating
actuating magnet
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
US751869A
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English (en)
Inventor
Edmund Bausch
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.)
Binder Magnete GmbH
Original Assignee
Binder Magnete GmbH
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
Priority claimed from DE19671589539 external-priority patent/DE1589539B2/de
Application filed by Binder Magnete GmbH filed Critical Binder Magnete GmbH
Application granted granted Critical
Publication of US3548353A publication Critical patent/US3548353A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01F7/14—Pivoting armatures

Definitions

  • Actuating magnet of fiat construction particularly for ofiice machines, data processing installations and the like, includes an E-shaped core having outer legs surrounded by a respective energizing coil so that the respective ends of the outer legs are located within the respective coil, and a double-armed armature rotatably mounted on the middle leg of the core so that one arm of the armature is displaceable into the interior of one of the coils, and the other arm into the interior of the other coil.
  • SPECIFICATION My invention relates to an actuating magnet of fiat construction as may be used, for example, for oifice machines, data processing installations and the like.
  • an E-shaped core having outer legs that are each surrounded by a respective energizing coil so that the leg ends are located within the coil.
  • two active air gaps are each located respec tively inside an energizing coil and are defined at least partly by the iron core which is formed of laminations of iron plates.
  • the construction according to the invention also provides a very favorable iron circuit with very small inactive air gaps, and the armature is provided with a very small mass. Due to the fact that the armature is rotatably mounted, the magnet force can be taken directly off the armature without the interposition of further structural elements.
  • the magnet force is applicable in various possible directions in the plane of movement of the armature. Purely rotational and purely linear forces and also forces along general curves are capable of being represented. More particularly, it is significant that the magnet forcedistance characteristic is independent of the magnitude of the stroke, i.e. the force-distance characteristic obtained both for strokes larger in comparison with the angle of rotation of the armature as well as for strokes smaller in comparison with that angle is the same as for a normal stroke, since the characteristic is dependent solely upon the magnet system and not upon the location at Which the force is taken from the armature. In addition, the full mechanical energy output of the magnet system is available in each direction of the force and for each stroke.
  • the rotatably mounted armature permits the use of the actuating magnet of my invention as a rotary magnet, exactly the same as a linear stroke magnet.
  • the magnet may thus be used as simple stroke or lift magnet, double and and reversing stroke magnet, hinged armature magnet or double or reversing rotary magnet.
  • the magnet is preferably provided with a symmetrical construction, however, it may also be constructed asymmetrically with regard to the location of the coils, air gaps, core plates, armature and zero position of the armature.
  • FIG. 1 is a plan view, partly broken away and partly in section, of an actuating magnet according to the invention
  • FIG. 2 is a view of FIG. 1 taken along the section line IIII in the direction of the arrows;
  • FIGS. 3a, 3b and 3c are fragmentary perspective views of different embodiments of the core and cover plates at the air gap in the magnet of FIG. 1;
  • FIG. 4 is a plot diagram of magnetic force-distance characteristic curve, corresponding to the magnet having the modifications shown in FIGS. 3a, 3b and 30;
  • FIGS. 5a and 5b are diagrammatic views of part of the armature of the magnet shown in FIG. 1 showing a resetting spring therefor connected at different locations thereto.
  • an actuating magnet having a movable armature 1, an E-shaped core 3, which may consist of a single plate, as shown in FIG. 2, or of a number of plates, U-shaped cover plates 4 and 5 mounted laterally on the core 3, and energizing coils 2a and 2b, surrounding the outer legs of the core 3.
  • the armature 1 is rotatably mounted in a bush 6 means of a pin 7 extending between two T-shaped plates 9 and 10 that are secured to the middle leg of the E-shaped core 3-.
  • One arm 1a of the armature 1 extends into the interior of the coil 2a, and the other arm 1b of the armature extends into the interior of the other coil 2b.
  • the armature 1 rotates about its bearing pin 7 and the respective end arm of the armature 1 then plunges into the respective coil and abuts against an end face, provided with an adhesion surface 11, of a respective outer leg of the E-shaped core 3.
  • FIGS. 3a, 3b and 30 show different construction of the core and cover plates of the outer legs of the E-shaped core, the cover plates forming cooperating members for the armature end arms.
  • a magnetic force-distance characteristic curve a, c or b is obtained, as shown in FIG. 4. These magnetic force-distance characteristic curves remain constant, independently of the particular stroke of the magnet.
  • the actuating force may be determined or taken off directly from the armature 1.
  • the magnitude and direction of the actuating force may be taken off directly as a linear force, as in the case of a lifting magnet, by means of a diagrammatically illustrated rod 12.
  • Another possible way is to take oif the actuating force as a purely rotational force by way of the shaft or pin 7 bearing the armature l.
  • a third possible way for the direct takeoff of force is to provide the armature 1, either on one or on both sides thereof with a cam surface 13 as shown in broken lines, which cooperates with a roller 14 so that, depending on the shape of this cam surface 13, force can be taken off along a predetermined curve path.
  • FIGS. 5a and 5b illustrate two practical application of my invention, in which, by means of a tension spring 8, the armature 1 is fixed in zero position either at two initial positions as in the embodiment of FIG. 5a, or at a middle position as in the embodiment of FIG. 5b, when the coils are de-energized. A very great variety of force-distance characteristic curves may be produced thereby.
  • the yoke faces of the core 3 are extremely well protected from dirt, since any dust particles or other contaminating particles, such as iron particles or the like, can at best only reach the surfaces of the yoke or magnet core 3 through the narrow gap located between the armature arms In and 1b and the inner edge of the respective coils 2a and 2b.
  • the effective air gap is preferably located in the region of the upper third to the upper half of each coil, as shown in FIGS. 1 and 2.
  • the armature 1, preferably constructed symmetrically with respect to its axis of rotation extending along the pin 7, is very insensitive to linear vibrations.
  • All the parts conducting magnetic flux may be produced, for example, by a stamping operation and can be assembled by welding, adhesion or riveting. A very economical manufacture is thereby assured.
  • the actuating magnet according to the invention may be operated by direct current or alternating current. In the latter case, the lamination plates of the core 3 and/or of the armature 1 should not be too thick and, for example, should be electrically insulated from one another by any suitable means.
  • Actuating magnet of flat construction comprising an E-shaped electromagnetic core, having a pair of outer legs and a center leg therebetween, each of said outer legs being flat and having a free end, a cover plate respectively covering the opposite fiat sides of said outer legs and projecting beyond said free end of said outer legs, an energizing coil having a hollow center surrounding each of said plate-covered outer legs of said core, respectively, so that the free end of said outer legs is disposed within the hollow center of the respective coil, and a double-armed armature rotatably mounted on said center leg of said core so that one of the double arms thereof is displaceable into the hollow center of one of said coils and the other of the double arms into the hollow center of the other of said coils and both arms respectively receivable between the projecting cover plates of each of said outer legs and engageable with an end face at the free end of said outer legs, respectively.
  • said core and said armature are formed of stamped-out laminations of magnetic flux-conducting metal plates, and layers of adhensive material between said laminations for bonding together the laminations of said core and of said armature, respectively.
  • said armature is substantially centrally pivoted and including spring means anchored at one end to a point stationary relative to the pivot of said armature and extending transversely to said double arms of said armature over said pivot thereof and secured to said armature at a location thereof beyond said pivot in a direction from said stationary point.
  • said armature is substantially centrally pivoted, and including spring means anchored at one end to a point sta- 5 tionary relative to the pivot of said armature and extending transversely to said double arms of said armature toward said pivot thereof and secured to said armature at a location thereof between said stationary point and said pivot.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
US751869A 1967-08-11 1968-08-12 Actuating magnet of flat construction Expired - Lifetime US3548353A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671589539 DE1589539B2 (de) 1967-08-11 1967-08-11 Elektromagnet in flachbauweise fuer bueromaschinen datenver arbeitungsanlagen und aehnliche einrichtungen

Publications (1)

Publication Number Publication Date
US3548353A true US3548353A (en) 1970-12-15

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US751869A Expired - Lifetime US3548353A (en) 1967-08-11 1968-08-12 Actuating magnet of flat construction

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US (1) US3548353A (is")
FR (1) FR1575302A (is")
GB (1) GB1232446A (is")

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970978A (en) * 1974-01-31 1976-07-20 La Telemecanique Electrique Electromagnet
US4893104A (en) * 1988-01-11 1990-01-09 Santoni S.R.L. Electromagnetic actuator device, in particular for the selection of the needles on a knitting machine
US20120212307A1 (en) * 2010-01-13 2012-08-23 Mitsubishi Electric Corporation Electromagnetically operated switching device
US9524818B2 (en) * 2011-03-30 2016-12-20 Buerkert Werke Gmbh Lifting armature actuator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1315777A (en) * 1919-09-09 Terry t
US1532045A (en) * 1923-07-06 1925-03-31 Gen Electric Light-flashing relay
US1538950A (en) * 1924-05-24 1925-05-26 W H Reisner Mfg Co Circuit-controlling device
US2679563A (en) * 1951-05-31 1954-05-25 Katsumata Akifumi Electromagnetic switch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1315777A (en) * 1919-09-09 Terry t
US1532045A (en) * 1923-07-06 1925-03-31 Gen Electric Light-flashing relay
US1538950A (en) * 1924-05-24 1925-05-26 W H Reisner Mfg Co Circuit-controlling device
US2679563A (en) * 1951-05-31 1954-05-25 Katsumata Akifumi Electromagnetic switch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970978A (en) * 1974-01-31 1976-07-20 La Telemecanique Electrique Electromagnet
US4893104A (en) * 1988-01-11 1990-01-09 Santoni S.R.L. Electromagnetic actuator device, in particular for the selection of the needles on a knitting machine
US20120212307A1 (en) * 2010-01-13 2012-08-23 Mitsubishi Electric Corporation Electromagnetically operated switching device
US8754730B2 (en) * 2010-01-13 2014-06-17 Mitsubishi Electric Corporation Electromagnetically operated switching device
US9524818B2 (en) * 2011-03-30 2016-12-20 Buerkert Werke Gmbh Lifting armature actuator

Also Published As

Publication number Publication date
FR1575302A (is") 1969-07-18
GB1232446A (is") 1971-05-19

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