US2864038A - Electromagnetic device - Google Patents

Electromagnetic device Download PDF

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Publication number
US2864038A
US2864038A US533866A US53386655A US2864038A US 2864038 A US2864038 A US 2864038A US 533866 A US533866 A US 533866A US 53386655 A US53386655 A US 53386655A US 2864038 A US2864038 A US 2864038A
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US
United States
Prior art keywords
armature
stator
carrier
stirrup
air gaps
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
US533866A
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English (en)
Inventor
Ruhland Alois
Fischer Josef
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.)
Siemens and Halske AG
Siemens Corp
Original Assignee
Siemens 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 Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US2864038A publication Critical patent/US2864038A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2227—Polarised relays in which the movable part comprises at least one permanent magnet, sandwiched between pole-plates, each forming an active air-gap with parts of the stationary magnetic circuit

Definitions

  • This invention relates to an electromagnetic device and is particularly concerned with a device for adjustably mounting an armature relative to pole shoes of a stator.
  • the working air gaps In electromagnetic moving-armature systems for relays, electric switches, bells or buzzers and the like, the working air gaps must be very accurately adjusted by hand after assembly and in the overhauling of the systems. In high-grade relays, the air gaps only amount to fractions of a millimetre. In magnetic systems having, for example, two or more air gaps the air gaps which are set during assembly are likely to be unequal owing to the tolerances which must be allowed in the manufacture of the individual parts.
  • an electromagnetic moving-armature device wherein an armature is arranged to co-operate with a stator, said armature being mounted by adjusting means on a carrier which is arranged to be rotatable about an axis, said axis thus constituting the axis of rotation of the armature, and said adjusting means being such that the operation thereof effects the adjustment of the air gap(s) between the pole piece(s) of the armature, and that (those) of the stator.
  • Figs. 1 and 1a show a part-sectional side elevation and an end elevation respectively of a polarised relay
  • Fig. 1b is a part-sectional plan view taken along the line 1b-1b of Fig. 1,
  • Fig. 2 illustrates a front elevation of a further polarised relay
  • Fig. 2a is a part-sectional plan view taken along the line 2a2a of Fig. 2.
  • a winding 1 on a stator is arranged to be energised by current impulses flowing in one direction or the other.
  • Pole shoes 1:: of the stator are of plate form and each of them extends between two corresponding armature pole pieces. The latter are formed by two plates 2 and 3 between which is firmly secured a permanent magnet 4.
  • the parts 2, 3 and 4 of the armature are mounted on a non-magnetic U-shaped supporting stirrup 5 with the aid of two set screws 7 which pass through the stirrup 5 and engage with corresponding threads in the armature plate 2.
  • the armature is mounted so as to be rotatable by means of pins 5a and 5b which pass through the arms of the stirrup 5 and also through plates 60 and 6b, so that the axis of the pins constitutes the axis of rotation of the armature.
  • the plates 6a and 6b may be made fast with the stator for example, they may be secured to the magnet yokes thereof; the corresponding connection has been omitted for the sake of clarity.
  • the magnet 4 is so disposed that the magnetic flux it produces is directed perpendicular to the plane which contains the pole shoes In, that is along the lines indicated armature plate 2.
  • the flux distribution in the air gaps due to this magnet is therefore constant, but superimposedon the flux inthe air gaps there are impulses of the exciting flux produced by the impulses in the winding 1.
  • the armature is, therefore, caused to rotate in one direction or theother, according to the nature of the impulses, about its axis of. rotation.
  • a corrugated leaf spring 8 is disposed between the stirrup 5 and the armature plate 2 and the distance between the members 8 and 2 may be adjusted to a desired value by corresponding setting of the set screws 7. It is in this manner, by uniform adjustment of both set screws possible to align the part 2 in parallel to the transverse wall of part 5, thereby making the two air gaps or pairs of air gaps symmetrical.
  • the magnetic parts of the armature that is the permanent magnet 4, and the two plates 2 and 3, are loosely disposed one upon another and are surrounded by a frame comprising a U-shaped stirrup 5 and a leaf spring clip 9.
  • the stirrup is provided with pins 5a and 5b forming the axis of rotation of the armature as described with reference to Fig. l.
  • the ends of the clip 9 extend over the ends of the arms of the stirrup 5 and engage in corresponding apertures in the stirrup, while the active curved portion of the clip 9 presses against the plate 3, to hold the armature fast to the stirrup.
  • the air gaps between the stator and armature pole pieces are again adjusted by means of the set screws 7.
  • the set screws 7 are merely screwed into the stirrup 5 and their tips press against the armature plate 2 against the thrust of the spring clip 9.
  • the clip 9, like the spring 8 described before serves to reduce the possibility of looseness of, or mechanical play between, the parts.
  • a polarized magnetic system comprising a stator having two pole shoes extending therefrom, an armature comprising a permanent magnet carrying two platelike members each forming two pole pieces one for magnetic cooperation with each of said stator pole shoes, and a device for rotatably mounting said armature, said device comprising a cross-sectionally U-shaped carrier made of non-magnetic material, adjusting means for adjustably connecting one of said platelike members with the base of said carrier, means for rotatably mounting the arms of said carrier, and spring means tending to hold said armature away from said carrier.
  • a polarized magnetic system comprising a stator having two pole shoes extending therefrom, an armature comprising a permanent magnet carrying two platelike members each forming two pole pieces one for magnetic cooperation with each of said stator pole shoes, and a device for rotatably mounting said armature, said device comprising a cross-sectionally U-shaped carried made ofv non-magnetic material, adjusting means for adjustably connecting one of said platelike members with the base of said carrier, means for rotatably mounting the arms of said carrier, and spring means tending to move said carrier towards said armature.
  • a polarized magnetic system and cooperation of parts according to claim 3, comprising screws constituting said adjusting means.
  • a polarized magnetic system and cooperation of parts according to claim 3, comprising screws constituting said adjusting means, and spring means disposed between said base of said carrier and said platelike member of said armature.
  • a polarized magnetic system and cooperation of parts according to claim 3, comprising screws constituting said adjusting means, and spring means connected with the arms of said carrier.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Linear Motors (AREA)
US533866A 1954-09-15 1955-09-12 Electromagnetic device Expired - Lifetime US2864038A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE334120X 1954-09-15

Publications (1)

Publication Number Publication Date
US2864038A true US2864038A (en) 1958-12-09

Family

ID=6214315

Family Applications (1)

Application Number Title Priority Date Filing Date
US533866A Expired - Lifetime US2864038A (en) 1954-09-15 1955-09-12 Electromagnetic device

Country Status (6)

Country Link
US (1) US2864038A (en, 2012)
BE (1) BE541284A (en, 2012)
CH (1) CH334120A (en, 2012)
FR (1) FR1167525A (en, 2012)
GB (1) GB779974A (en, 2012)
NL (2) NL100652C (en, 2012)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191937A (en) * 1977-04-18 1980-03-04 Manufacture Francaise D'appareils Electriques De Mesure Electromagnet magnetic circuit with permanent-magnet armature

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2219157A (en) * 1936-12-31 1940-10-22 Teletype Corp Electroresponsive device
FR1080986A (fr) * 1952-07-15 1954-12-15 Autophon Ag Noyau magnétique polarisé notamment pour sonneries électriques à courant alternatif
DE923563C (de) * 1943-12-05 1955-02-17 Siemens Ag Gepoltes elektromagnetisches Relais
FR1097324A (fr) * 1953-03-06 1955-07-04 Westinghouse Electric Corp Contacteur électromagnétique
FR1103207A (fr) * 1953-09-24 1955-10-31 Siemens Ag Dispositif d'électro-aimant polarisé à armatures vibrantes à magnétisme permanent

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2219157A (en) * 1936-12-31 1940-10-22 Teletype Corp Electroresponsive device
DE923563C (de) * 1943-12-05 1955-02-17 Siemens Ag Gepoltes elektromagnetisches Relais
FR1080986A (fr) * 1952-07-15 1954-12-15 Autophon Ag Noyau magnétique polarisé notamment pour sonneries électriques à courant alternatif
FR1097324A (fr) * 1953-03-06 1955-07-04 Westinghouse Electric Corp Contacteur électromagnétique
FR1103207A (fr) * 1953-09-24 1955-10-31 Siemens Ag Dispositif d'électro-aimant polarisé à armatures vibrantes à magnétisme permanent

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191937A (en) * 1977-04-18 1980-03-04 Manufacture Francaise D'appareils Electriques De Mesure Electromagnet magnetic circuit with permanent-magnet armature

Also Published As

Publication number Publication date
GB779974A (en) 1957-07-24
BE541284A (en, 2012)
FR1167525A (fr) 1958-11-26
NL200352A (en, 2012)
CH334120A (de) 1958-11-15
NL100652C (en, 2012)

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