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US3701066A - Electromagnet assembly for relays - Google Patents

Electromagnet assembly for relays Download PDF

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Publication number
US3701066A
US3701066A US139590A US3701066DA US3701066A US 3701066 A US3701066 A US 3701066A US 139590 A US139590 A US 139590A US 3701066D A US3701066D A US 3701066DA US 3701066 A US3701066 A US 3701066A
Authority
US
United States
Prior art keywords
armature
legs
yoke
assembly according
springs
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
US139590A
Other languages
English (en)
Inventor
Werner Bosch
Ulrich Kobler
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 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
Priority claimed from DE19702023983 external-priority patent/DE2023983C/de
Application filed by Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US3701066A publication Critical patent/US3701066A/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/34—Means for adjusting limits of movement; Mechanical means for adjusting returning force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/24—Parts rotatable or rockable outside coil
    • H01H50/28—Parts movable due to bending of a blade spring or reed

Definitions

  • An electromagnet assembly has a U-shaped armature mounted on an electromagnet yoke by means of leaf springs forming extensions of the armature arms and serving to hold the armature normally spaced from the magnetizable -yoke, the armature arms and springs being related and connected in an especially advantageous manner.
  • This invention relates to electromagnet assemblies for relays, and is more particularly concerned with the operative connection of the armature and the yoke in such an assembly.
  • An important object of the present invention is to overcome the foregoing and other disadvantages, defects, inefficiencies, shortcomings and problems in prior structures, and to attain important advantages and improvements in the construction of electromagnet assemblies, and more particularly in the connection of the armatures to the yokes in such assemblies.
  • Another object is to provide leaf spring mounting of armatures in electromagnet assemblies wherein the springs are free from undesirable warpage or tension.
  • a further object of the invention is to provide a new and improved simplified mounting of armatures in electromagnet assemblies especially suitable for relays.
  • Still another object of the invention is to provide new and improved attachment of the biasing leaf springs to the arms of U-shaped armatures for electromagnet assemblies.
  • Yet another object of the invention is to improve the connecting spring arrangement which is long-lived and has safety features against premature deterioration or failure.
  • FIG. 1 is an isometric view of an electromagnet as sembly embodying features of the invention
  • FIG. 2 is an exploded assembly view of the armature and supporting biasing springs for the armature
  • FIGS. 3a and 3b are schematic side elevational views of the assembly showing the armature in the normalor at rest and working positions relative to the yoke.
  • An electromagnet assembly especially useful for relays comprises a generally E-shaped yoke l operatively mounting an exciting structure 2 and a generally U-shaped armature 3 attached to the yoke through the medium of biasing springs 4.
  • the exciter structure comprises an electrical coil assembly having its exciting winding 2b mounting on and about the shank of a pole piece arm la of the yoke with a pole shoe extension of this arm attractively facing the cross bar of the armature 3 from the opposite end portions of which extend identical co-extensive legs 3a which face side arms lb of the yoke.
  • the opposite end portions of the armature cross bar carry rigidly mounted relay contact spring actuating finger elements 3b which function when the system is excited and the armature is drawn toward the pole shoe to trip contacts of the associated relay (not shown).
  • the biasing springs 4 are constructed from spring sheet metal of high magnetic permeability in the form of elongated leaf springs which are as nearly as practicable identical and have a bend 4a transversely thereacross dividing the same into a mounting body portion 4b and an angularly related armature-supporting leg 40.
  • each of the spring body portions is provided a transversely elongated hole 4d within which is engaged a similarly shaped rivet 5 by means of which the respective spring body is secured fixedly to the supporting yoke arm lb.
  • the springs are secured positively against turning relative to the supporting yoke arm as well as flat against the arm.
  • the free spring legs 40 project at an obtuse angle a relative to the respective mounting body portions 4b and the degree of this angle determines the reset position of the armature.
  • a new and improved connection of the armature legs 3a to the supporting spring legs 40 comprises means which will avoid tensioning the springs and essentially simplify the mounting, as compared to prior arrangements.
  • each of the spring legs 40 is provided on its distal end portion with self-retaining armature leg gripping means desirably in the form of a generally claw-like structure each havinga pair of complementary opposite side extension gripping claw flanges 4e bent upwardly and inwardly, as shown, and receptive of the associated armature leg therebetween.
  • the armature legs are provided with respective recesses 30 into which the free end portions of the flanges 4e are retainingly engaged.
  • the recesses are simply indentations in the as sociated face of the respective armature legs into which the interlocking end portions of the flanges 4e are turned.
  • the faces of the armature legs 3a opposite to the indentation recesses 30 are flat and are in flatwise face-to-face engagement with the spring legs 40 and the interlocking claw flanges 4e hold the armature legs in firm, inescapable engagement with the spring legs.
  • the spring legs 40 hold the armature 3 in the spaced relation to the yoke 1 as shown in FIGS. 1 and 3a, and more particularly at an angle B to the plane of the adjacent yoke face.
  • This angle is adapted to be controlled by a stop (not shown) in the associated relay for the most efiicient operating relationship to the associated relay contact springs.
  • the stop in the relay assembly may actually hold the armature in a position which is approximately midway between the maximum B angle position of FIG. 3a and the excited operating position of FIG. 3b where the armature is electromagnetically drawn to and held substantially parallel to the supporting yoke.
  • the biasing springs 4 are substantially free from objectionable stresses and are least liable to crystalizing strains in operation.
  • the spring body 4b lies practically flat against the support ing yoke arm 1b.
  • the bend 4a provides a smoothly rolling fulcrum which rides on the underlying yoke arm 1b and in the transition from the non-operating or at rest position to the operating position effects a slight upward resilient bowing deflection of the associated spring body 4b away from the yoke arm.
  • a valuable safety feature is provided against undesirable stresses in the supporting springs, because there is a small amount of free play permitted in the connection between the armatures 3 and the leaf springs 4 even though they are thoroughly locked together.
  • Another advantage resides in that bearing friction between the armature and the yoke is avoided by reason of the support of the armature by the free spring leg portions 40, and bearing engagement occurring at the fulcrum bends 4a which, in effect, roll on the yoke arms 1b during operation movements of the armature.
  • Structural and material tolerance demands are met in a more efficient and economical manner than in prior structures because instead of necessarily taking such demands into account during attachment of the biasing springs to the armature, they can be effected in the production of the respective elements themselves by machine method of mass production manufacture.
  • an electromagnet assembly for relays including an E-shaped yoke with a center pole piece arm carrying an exciting coil and having a pole shoe extension operatively related to a bar armature extending thereacross and provided with a pair of spaced arms held in normally spaced relation to side arms of the yoke by respective biasing leaf springs, the improvement comprising:
  • said interlock means comprising recesses in the armature legs and portions of said flanges turned into said recesses.
  • said flange means comprising claw-like cooperating pairs of flanges on the respective springs.
  • each of the flanges of each of the pairs of flanges having turned end portions engaged in recesses in the armature arms.
  • said springs each having a body portion and an obtusely angular armature-supporting leg provided with said armature leg engaging flanges, said body portion and said spring leg being connected by a fulcrum bend, and means fixedly connecting the body portion adjacent to its end remote from said bend to the associated yoke arm, whereby the spring legs hold the armature normally biased away from the pole shoe extension and upon energizing the exciting coil to effect drawing of the armature toward the pole shoe extension fulcruming occurs at the fulcrum bend accompanied by upward resilient flexing bending of said body portion.
  • an electromagnet assembly for relays including an E-shaped yoke with a center pole piece arm carrying an exciting coil and having a pole shoe extension operatively related to a bar armature extending thereacross and provided with a pair of spaced legs held in normally spaced relation to side arms of the yoke by respective biasing leaf springs, the improvement comprising:'
  • said leaf springs including body portions and armature-supporting legs connected together at obtuse angle bends such that with the body portions lying generally parallel with the yoke arms the spring legs extend angularly away from the yoke arms;
  • An assembly according to claim 8 including clawlike flanges on said spring legs gripping said armature legs and thereby connecting the armature legs to the spring legs.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
US139590A 1970-05-15 1971-05-03 Electromagnet assembly for relays Expired - Lifetime US3701066A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702023983 DE2023983C (de) 1970-05-15 Elektromagnetsystem fur Relais

Publications (1)

Publication Number Publication Date
US3701066A true US3701066A (en) 1972-10-24

Family

ID=5771279

Family Applications (1)

Application Number Title Priority Date Filing Date
US139590A Expired - Lifetime US3701066A (en) 1970-05-15 1971-05-03 Electromagnet assembly for relays

Country Status (6)

Country Link
US (1) US3701066A (xx)
AT (1) AT306155B (xx)
BE (1) BE767199A (xx)
CH (1) CH521665A (xx)
FR (1) FR2090053B1 (xx)
GB (1) GB1306787A (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818397A (en) * 1973-09-06 1974-06-18 Bell Northern Research Ltd Reduction of armature rebound in crossbar switch units
US3839690A (en) * 1972-11-29 1974-10-01 Siemens Ag Insulating means for an electromagnetic relay
US3953814A (en) * 1974-09-21 1976-04-27 Hartmann & Braun Aktiengesellschaft Polarized electro-magnetic relay
US4008447A (en) * 1975-11-14 1977-02-15 Northern Electric Company Limited Miniature electrical relay
US4342019A (en) * 1979-12-13 1982-07-27 Siemens Aktiengesellschaft Electromagnetic relay with a flat armature
US4481493A (en) * 1981-10-09 1984-11-06 Siemens Aktiengesellschaft Polarized electromagnetic relay
US4514711A (en) * 1983-07-30 1985-04-30 Matsushita Electric Works, Ltd. AC Drive electromagnetic relay
WO1998050932A1 (de) * 1997-05-05 1998-11-12 Eh-Schrack Components Aktiengesellschaft Elektromagnetisches relais

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048749A (en) * 1958-03-06 1962-08-07 Bull Sa Machines Electric relay
US3117255A (en) * 1961-01-04 1964-01-07 Hamilton Watch Co Electromagnet for winding automobile clocks
US3474367A (en) * 1968-03-06 1969-10-21 Allied Control Co Relay motor
US3505629A (en) * 1966-08-18 1970-04-07 Siemens Ag Unipolar flat-type of miniature construction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE809217C (de) * 1948-10-01 1951-07-26 Telefonbau & Normalzeit Gmbh Anordnung zur Lagerung und Befestigung von Relaisankern
US2682585A (en) * 1952-05-24 1954-06-29 Bell Telephone Labor Inc Electromagnetic relay
FR1534341A (fr) * 1966-08-18 1968-07-26 Siemens Ag Relais non polarisé de construction miniaturisée

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048749A (en) * 1958-03-06 1962-08-07 Bull Sa Machines Electric relay
US3117255A (en) * 1961-01-04 1964-01-07 Hamilton Watch Co Electromagnet for winding automobile clocks
US3505629A (en) * 1966-08-18 1970-04-07 Siemens Ag Unipolar flat-type of miniature construction
US3474367A (en) * 1968-03-06 1969-10-21 Allied Control Co Relay motor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839690A (en) * 1972-11-29 1974-10-01 Siemens Ag Insulating means for an electromagnetic relay
US3818397A (en) * 1973-09-06 1974-06-18 Bell Northern Research Ltd Reduction of armature rebound in crossbar switch units
US3953814A (en) * 1974-09-21 1976-04-27 Hartmann & Braun Aktiengesellschaft Polarized electro-magnetic relay
US4008447A (en) * 1975-11-14 1977-02-15 Northern Electric Company Limited Miniature electrical relay
US4342019A (en) * 1979-12-13 1982-07-27 Siemens Aktiengesellschaft Electromagnetic relay with a flat armature
US4481493A (en) * 1981-10-09 1984-11-06 Siemens Aktiengesellschaft Polarized electromagnetic relay
US4514711A (en) * 1983-07-30 1985-04-30 Matsushita Electric Works, Ltd. AC Drive electromagnetic relay
WO1998050932A1 (de) * 1997-05-05 1998-11-12 Eh-Schrack Components Aktiengesellschaft Elektromagnetisches relais
US6144270A (en) * 1997-05-05 2000-11-07 Eh-Schrack Components Aktiengesellschaft Electromagnetic relay

Also Published As

Publication number Publication date
FR2090053A1 (xx) 1972-01-14
AT306155B (de) 1973-03-26
FR2090053B1 (xx) 1975-08-01
BE767199A (fr) 1971-11-16
DE2023983A1 (de) 1971-12-02
GB1306787A (en) 1973-02-14
DE2023983B2 (de) 1972-10-26
CH521665A (de) 1972-04-15

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