US3497845A - Fitting a solenoid core to a pole piece structure - Google Patents

Fitting a solenoid core to a pole piece structure Download PDF

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Publication number
US3497845A
US3497845A US674931A US3497845DA US3497845A US 3497845 A US3497845 A US 3497845A US 674931 A US674931 A US 674931A US 3497845D A US3497845D A US 3497845DA US 3497845 A US3497845 A US 3497845A
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United States
Prior art keywords
core
flux
magnetic
pole piece
fitting
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Expired - Lifetime
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US674931A
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English (en)
Inventor
Raymond Bernier
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CORP SOC CIVILE DE PROTOTYPE T
CORP SOC CIVILE DE PROTOTYPE TECHNIQUE ELECTRONIQUE SOPROTEKEL
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CORP SOC CIVILE DE PROTOTYPE T
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • 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
    • H01F7/081—Magnetic constructions
    • 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
    • H01F7/081—Magnetic constructions
    • H01F2007/083—External yoke surrounding the coil bobbin, e.g. made of bent magnetic sheet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
    • H01H50/041—Details concerning assembly of relays
    • H01H2050/046—Assembling parts of a relay by using snap mounting techniques
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • H01H2050/367—Methods for joining separate core and L-shaped yoke

Definitions

  • This invention relates to the construction of relays, arc-quenching electromagnetic devices used in circuitbreakers, electromagnetic or magnetic actuators and more generally, permanent magnet or electromagnetic structures of the lifting, holding or releasing types, including elongated flux-generating elements such as permanent magnets or solenoids having a ferromagnetic core and flux-carrying elements, such as yokes or pole pieces, forming with the flux-generating elements a magnetic circuit, said flux-carrying elements having plane portions substantially at right angles to the elongated flux-generating elements which are secured thereto.
  • elongated flux-generating elements such as permanent magnets or solenoids having a ferromagnetic core and flux-carrying elements, such as yokes or pole pieces, forming with the flux-generating elements a magnetic circuit, said flux-carrying elements having plane portions substantially at right angles to the elongated flux-generating elements which are secured thereto.
  • One of the objects of this invention is to provide a magnetic structure construction in which the flux-generating and flux-carrying elements are fitted together in a simple and inexpensive way, the construction being, however, rugged and highly efiicient in action.
  • Another object is to provide an assembly of a flux-generating and a flux-carrying element, in which the many and various disadvantages, deficiencies and defects of magnetic structure constructions heretofore known may be dependably and reliably overcome in a thoroughly practical way.
  • Another object is to provide an assembly of the abovementioned character, in which the flux-generating elements may be easily positioned or removed, even though the magnetic structure be comparatively complex and include a plurality of flux-generating elements.
  • FIG. 1 is a perspective view of the core and stationary magnetic circuit of a relay constructed in accordance with the invention, of which FIG. 2 is a front elevation, and
  • FIG. 3 is a horizontal sectional view as seen along the line I-I of FIG. 2;
  • FIG. 4 is a front elevation of a modified magnetic structure, of which FIG. 5 is a sectional view as seen along the line H- II of FIG. 4, and
  • FIG. 6 is a sectional view taken along the line III- III in FIG. 4;
  • FIGS. 7 and 8 are partial sectional views of modified embodiments of the magnetic structures which are illustrated in FIGS. 1-6;
  • FIG. 9 is a front elevation of a bi-stable relay built in accordance with the invention, of which FIG. 10 is a sectional view as seen along the line IV- IV of FIG. 9, and
  • FIG. 11 is a sectional view as seen along the line V-- V of FIG. 9.
  • FIGS. l3 of the drawings there is illustrated an L-shaped magnetic yoke l-la and an elongated core 2 secured to part 1a of the yoke, at right angles thereto.
  • the core insulating sleeve 6 supports an energizing winding, not illustrated.
  • the yoke 1-1a will be for instance the stationary part of the magnetic circuit of a relay having a movable armature, not illustrated.
  • the problem with which the present invention has to cope is the fitting of the flux-producing element 2 to the flux-carrying element 1a.
  • a grooved portion 7 which is fitted by force into a slot 5.
  • the slot 5 is cut out in the upper part of member 1a, so that the grooved portion 7 may be removed therefrom by pulling upwardly on the core.
  • the core can not be removed from the magnetic circuit in the heretofore known constructions, as it should be pulled out in a direction parallel to the length thereof, which is not usually possible due to the conformation of the magnetic circuit, particularly the armature, against which the core would abut.
  • a particular feature of this invention is that the core is fitted and removed in a direction substantially at right angles to the length thereof.
  • fitting is more simple and inexpensive than the heretofore generally used screwed, riveted or adhesive joints, and better adapted to magnetic flux transfer with constant magnetic reluctance.
  • the easy removalof the core will enable one to fit difi'erent types of flux producing elements on one single type of yoke, which is highly advantageous in mass production of relays adapted for use with energizing currents of various voltages.
  • the grooved part 7 is bounded by two disc-shaped members 3 and 4 integrally built with the core.
  • the members 3 and 4 will closely engage the surface of part 1a and improvxe the flux transfer from the core to the yoke.
  • the grooved part 7 is turned on lathe, after the core 2 has been pressed within the moulded sleeve 6.
  • the grooved part 7 is bonded by disc-shaped member 4 and by the end surface 3a of the core.
  • the core is manufactured separately and then lodged within the sleeve 6, to which it is attached by means of a clip 8.
  • the terminal portion of the sleeve 6 forms first and second flanges 6a and 4a defining therebetween a grooved portion 7d which is fitted by force in the corresponding slot 5 (not illustrated) of part 1a.
  • a magnetic gap is provided, by sleeve 6, between the core 6 and part 1a.
  • the said gap d is at right angles to part 1a, whereas in FIG. 8, the gap d is parallel to part 1a.
  • FIGS. 7 and 8 will be preferred when the magnetic structure is energized by alternating current: the gap will practically cancel the effect of remanent magnetism and therefore will avoid any adherence 3 v of the armature to the core after the current has been cut out.
  • the bi-stable' relay which is illustrated in FIGS. 9-11 has two separate coils 13a, 13b wound on the same magnetic core 2, on which are fitted three pole pieces 11a, 11b, 110 which form the stationary part of the fluxcarrying magnetic circuit.
  • the pole pieces cooperate with a movable armature 12 which pivots about pole piece 11b so as to engage either pole piece 11a or pole piece 11c.
  • the construction of this well known type of relay involves important difliculties as far asthe fitting of the pole pieces to the core is concerned and, in the heretofore known constructions, the pole pieces, and, therefore, the coils, are not removable.
  • the core 2 is provided with grooved parts 7a, 7b, 70 which co-operate with slots, such as a, provided in the respective pole pieces.
  • the slot 5a does not open on one side of the pole piece 11b, but includes an enlarged portion 9a through which the core will be easily introduced, before fitting by force the grooved part 7b thereof into the smaller section of the slot.
  • the two other slots, which respectively co-operate with the grooved parts 7a and 7c, are similar to slot 5a.
  • the windings 13a and 13b will be suppressed and the core 2 will be substituted by a rod-shaped permanent magnet having for instance a South pole at both ends and a North pole in the middle part thereof.
  • the pole pieces will be fitted on said permanent magnet in a way similar to that illustrated in FIG. 10. It is remarked that the problem of fitting a permanent magnet to a pole piece or other flux-carrying element is particularly difficult, as the magnetic properties of the permanent magnet material should not be modified by the fixing process and as the magnetic reluctance of the joint should not vary as a function of temperature or other environment conditions, which prevents from sticking the magnet to the pole piece.
  • said flux-carrying element being L-shaped and including a first plane surface portion substantially at right angles to the main dimension of the flux-producing element and a second plane surface portion substantially parallel to the said main dimension, wherein the said shoulder forming flanges consist of two disc-shaped members substantially at right angles to the said main dimension, said slot being provided in said first plane surface portion and having a main dimension which is substantially at right angles to said second plane surface portion, the said disc-shaped members closely engaging the first plane surface portion.
  • the flux-producing element includes a central core having an end surface and an insulating sleeve around said core, said sleeve having a terminal portion which forms first and second flanges and said reduced portion between said flanges, said flanges closely engaging the said surface portion and a magnetic gap between the end surface of said core and the said surface portion.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
US674931A 1966-10-13 1967-10-12 Fitting a solenoid core to a pole piece structure Expired - Lifetime US3497845A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR79866A FR1543930A (fr) 1966-10-13 1966-10-13 Mode de fixation des noyaux magnétiques dans les relais ou pièces polaires

Publications (1)

Publication Number Publication Date
US3497845A true US3497845A (en) 1970-02-24

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ID=8619059

Family Applications (1)

Application Number Title Priority Date Filing Date
US674931A Expired - Lifetime US3497845A (en) 1966-10-13 1967-10-12 Fitting a solenoid core to a pole piece structure

Country Status (5)

Country Link
US (1) US3497845A (fr)
BE (1) BE704644A (fr)
DE (1) DE1614545C3 (fr)
FR (1) FR1543930A (fr)
GB (1) GB1199628A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3202704A1 (de) 1981-01-31 1982-08-12 Shoketsu Kinzoku Kogyo K.K., Tokyo Hubmagnet
FR2506503A1 (fr) * 1981-05-20 1982-11-26 Bosch Gmbh Robert Ensemble forme de plusieurs electro-aimants, notamment pour la commande de soupapes dans un systeme antiblocage des roues d'un vehicule
US4833980A (en) * 1987-08-31 1989-05-30 Mannesmann Tally Corporation High efficiency coil posts for print hammer actuators
AU591874B2 (en) * 1984-08-22 1989-12-21 Bosch-Siemens Hausgerate Gmbh Electromagnet arrangement for controlling a plunger-type armature
US6362717B1 (en) * 1999-07-29 2002-03-26 Kelsey-Hayes Company Coil assembly
US6633216B2 (en) 2001-01-12 2003-10-14 Kelsey-Hayes Company Self-locating coil assembly
EP1455372A1 (fr) * 2003-03-06 2004-09-08 TYCO Electronics Austria GmbH Relais avec noyau magnétique à section transversale élargie
US11075028B2 (en) * 2018-08-14 2021-07-27 Korea Institute Of Science And Technology Impact actuator with 2-degree of freedom and impact controlling method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792392A (en) * 1972-12-18 1974-02-12 Bell Telephone Labor Inc Relay construction
FR2480489A1 (fr) * 1980-04-10 1981-10-16 Telemecanique Electrique Circuit magnetique a excitation par courant continu ou par courant alternatif
DE8815777U1 (de) * 1988-12-20 1990-04-26 Stribel GmbH, 7443 Frickenhausen Elektromagnetisches Relais
ATE217441T1 (de) * 1995-10-09 2002-05-15 Tyco Electronics Logistics Ag Elektromagnetisches relais und verfahren zu dessen herstellung
EP1009008B1 (fr) * 1998-12-07 2006-05-31 Matsushita Electric Works, Ltd. Relais électromagnétique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1016567A (en) * 1910-03-28 1912-02-06 Kellogg Switchboard & Supply Spring-armature relay.
US1467973A (en) * 1917-12-22 1923-09-11 Dayton Eng Lab Co Induction coil
US2395164A (en) * 1943-05-22 1946-02-19 Louis J Fageol Solenoid lock actuator
US3106669A (en) * 1960-04-27 1963-10-08 Automatic Elect Lab Mounting arrangement for coil bobbins
US3314032A (en) * 1964-09-08 1967-04-11 Western Electric Co Electrical coil assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1016567A (en) * 1910-03-28 1912-02-06 Kellogg Switchboard & Supply Spring-armature relay.
US1467973A (en) * 1917-12-22 1923-09-11 Dayton Eng Lab Co Induction coil
US2395164A (en) * 1943-05-22 1946-02-19 Louis J Fageol Solenoid lock actuator
US3106669A (en) * 1960-04-27 1963-10-08 Automatic Elect Lab Mounting arrangement for coil bobbins
US3314032A (en) * 1964-09-08 1967-04-11 Western Electric Co Electrical coil assembly

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3202704A1 (de) 1981-01-31 1982-08-12 Shoketsu Kinzoku Kogyo K.K., Tokyo Hubmagnet
FR2506503A1 (fr) * 1981-05-20 1982-11-26 Bosch Gmbh Robert Ensemble forme de plusieurs electro-aimants, notamment pour la commande de soupapes dans un systeme antiblocage des roues d'un vehicule
AU591874B2 (en) * 1984-08-22 1989-12-21 Bosch-Siemens Hausgerate Gmbh Electromagnet arrangement for controlling a plunger-type armature
US4833980A (en) * 1987-08-31 1989-05-30 Mannesmann Tally Corporation High efficiency coil posts for print hammer actuators
US6362717B1 (en) * 1999-07-29 2002-03-26 Kelsey-Hayes Company Coil assembly
US6633216B2 (en) 2001-01-12 2003-10-14 Kelsey-Hayes Company Self-locating coil assembly
EP1455372A1 (fr) * 2003-03-06 2004-09-08 TYCO Electronics Austria GmbH Relais avec noyau magnétique à section transversale élargie
US20040227600A1 (en) * 2003-03-06 2004-11-18 Rudolf Mikl Relay with a core having an enlarged cross-section
US7026896B2 (en) 2003-03-06 2006-04-11 Tyco Electronics Austia Gmbh Relay with a core having an enlarged cross-section
US11075028B2 (en) * 2018-08-14 2021-07-27 Korea Institute Of Science And Technology Impact actuator with 2-degree of freedom and impact controlling method

Also Published As

Publication number Publication date
FR1543930A (fr) 1968-10-31
GB1199628A (en) 1970-07-22
DE1614545B2 (de) 1972-06-15
DE1614545A1 (de) 1970-08-20
BE704644A (fr) 1968-02-15
DE1614545C3 (de) 1973-01-04

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