US3801940A - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

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Publication number
US3801940A
US3801940A US00232796A US3801940DA US3801940A US 3801940 A US3801940 A US 3801940A US 00232796 A US00232796 A US 00232796A US 3801940D A US3801940D A US 3801940DA US 3801940 A US3801940 A US 3801940A
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United States
Prior art keywords
armatures
short circuit
electromagnetic relay
contact spring
magnetic core
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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
US00232796A
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English (en)
Inventor
E Grassl
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Siemens AG
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Siemens AG
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Filing date
Publication date
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Publication of US3801940A publication Critical patent/US3801940A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/20—Non-polarised relays with two or more independent armatures

Definitions

  • the relay has a series magnetic circuit comprised of a magnetic core encircled by an excitation winding, a short circuit yoke arranged in parallel to the winding axis of the core and two magnetizable flat armatures pivotally mounted at the front end of the short circuit yoke.
  • the armatures are biased into a rest position by contact spring sets and thereby form two working air gaps with the poles of the magnetic core. in their operating positions the armatures magnetically bridge the short circuit yoke and the magnetic core.
  • the invention relates to an electromagnetic relay, which is particularly useful for telecommunication systems.
  • Relays of this type are needed in great quantities and are often installed in a multiple arrangement, wherein the individual relays are mounted very closely to one another.
  • contact springs concurrently act as armature restoring springs, while forming two working air gaps with the poles of the magnet core, and in their operating position they magnetically bridge the short circuit yoke and the magnetic core under the impetus of the contact spring assemblies.
  • the relay can be equipped in many ways with contact arrangements which can also be constructed as trailing contacts, in addition to the simple make contacts or break contacts. Moreover, in mixed construction arrangements the relay can also be provided with such contact sets. Also, with this division of the whole contact arrangement of the relay into individual contact groups, which can be operated by the two armatures, harmful tolerances which impair the switching reliability can be largely removed. These tolerances are well-nigh inavoidable in a construction having interdependent actuation of the individual contact springs.
  • contact springs act, as well, as armature restoring springs, so that the installation of additional restoring springs can be dispensed with.
  • the invention results in a relay of the simplest possible construction, because, aside from the magnet core, the short-circuit yoke, the two flat armatures and the contact spring sets can be made of individual contact springs. No further components are required, and these parts can, moreover, be made with comparatively very simple implements.
  • the relay is constructed to have a coil frame of insulating material, preferably made in accordance with an injection molding process.
  • the coil frame has two flanges which are mechanically and fixedly connected with one another over a winding cylinder which receives, axially, the magnetic core.
  • Each of the flanges has an opening for receiving the short circuit yoke, and each is provided with a recess for movably receiving either of the two arrnatures on the front portions of the short circuit yoke.
  • the coil frame is constructed to have two channels extending laterally and parallel to the longitudinal axis of the armature for seating a contact spring assembly, which projects above the movable end of the armature/At least one group of contact springs on the contact spring assemblies is constructed to operate as a reset spring for restoring the armatures to their rest positions.
  • This coil frame which can be made economically in one piece with all the necessary final shapings, assures easy assembly and a reliable fit with the relay parts to be installed. Due to the free accessibility to the winding cylinder,'it permits winding on modern'winding machinery prior to final assembly.
  • the flanges of the coil frame, in the area of the moving end of the armatures, are provided with guide grooves, in which an insulating actuation card, which serves to indirectly actuate the contact spring sets by the armature, is slidably supported in the direction of the armature stroke.
  • This feature of the invention permits the arrangement of at least two contact spring sets on both sides of the axial center of the armature and provides, moreover, for electric insulation of the contact springs from the armature.
  • the insulation card is deposited step by step into the area of engagement with the guide grooves and is given a U-shaped configuration as a whole, with the base support opposite the contact spring sets serving as the area of contact of the armature, then a precise mechanical sliding guide of the actuation card is provided. Further,- the armatures can engage in the actuation card in a space-saving method of construction.
  • the armature on its moving end, is designed as a two-pronged fork, and each flange of the coil frame in the vicinity of the guide grooves is provided with two recesses extending at right angles to the plane of the actuation card.
  • the two prongs of the fork-shaped armature end pass through the aforesaid recesses in the flange and bear with their free ends against the base support of the actuation card.
  • the recesses in the flanges of the coil frame can be designed as sliding guides for the prongs of the fork-shaped end of the armatures. These guides can be provided for with no additional machining cost when the coil frame is made.
  • a further arrangement of the invention provides that on the flanges of the coil frame, at least in the area of the essentially unmoving end of the armatures and in the area of the frontal sides of the actuation cards adjoining the 'contactsets in their rest positions, conically ascending pocks are formed. These are preferably formed from the direction of insertion of the armatures or of the actuation cards viatheir leading or entering edges and dropping off substantially at right angles to the flange plane. These are undetachably held on the coil frame utilizing the elasticity of the coil frame material of inserted armatures and actuation cards. These pocks can beprovided at the time the coil frame is made, e.g., in the extrusion die, so that neither additional retaining elements as such, nor, when necessary, costly assembly operations are needed for the installation thereof.
  • the relay can be equipped with a bottom plate made fromv insulating material known as a.funnel plate.
  • the bottom plate preferably can be locked in'po'sition by means of self-engagingsnap elements formed as interlocking recesses and projections on the coil frame.
  • the armature is provided, on its stationary end, with a frontal side which extends substantially at right angles to its two longitudinal edges, as well as to its plane; two projections being provided on the comers of this area, whose vertices lie, at least approximately, in the plane formed by the aforesaid frontal side of the armature.
  • the armature is pressed by means of a tension spring, whose mid-portion is supported under initial tension via the projections of the armature and whose ends are braced on suitable final shapings of the coil frame so as to press the same practically neutrally against the short-circuit yoke.
  • the edge of the frontal side of the armature opposite the projections forms the pivotal axis thereof with the .pole surface of the shortas centering and holding means for the connecting elements of the relay, can function to lock the contact spring sets in position.
  • This arrangement is based, first, on a conventional method'which has proved successful in practice for a fairly long period, i.e., to bring and maintain with the least possible effort the connecting elements of the relay for its contact springs and winding(s) in a set position. It is particularly important when construction is preformed on a grid board to stabilize and protect the assembly by mechanical means. Second,rby means of this bottom plate, the contact spring assemblies are held in their set positions without the need for additional work. Thus, in case of need, the interchangeability of individual contact springs. or whole contact spring assemblies is also maintained.
  • the magnet core is designed as a section of a cylinder and the short-circuit yoke as a rectangular section of flat material having a suitable size and perr'neability, great price and mechanical advantages are circuit yoke.
  • An armature can be used which can be made without cambering or other particular machining only as a punched piece from a permeable sheet metal of suitable thickness.
  • the neutral mounting support of the armature has a particularly favorable effect on the short-circuit yoke in connection with the resetting of the armature by contact springs of the relay.
  • a coil frame 1 made from insulation material preferably in accordance with the jet molding process, includes two flanges 3 and 4 having inlet and outlet slots of known construction for the connecting cables of one or more windings and a winding cylinder 2, which fixedly interconnects these two flanges by mechanical means.
  • the winding is enclosed in the aforesaid winding cylinder 2, and therefore, not visible herein.
  • the winding cylinder has a channel along the longitudinal axis thereof into which a magnet core 26 is pressed, so that its two ends penetrate flanges 3 and 4.
  • 'A recess having an appropriate cross section is projections in flanges 3 and 4 parallel to the winding axis of the winding into which a rectangular short-circuit yoke 27 is permanently pressed.
  • the yoke has frontal sides which terminate substantially in alignment with the pole ends of magnet core 26.
  • armatures 28 are partly visible in the drawing. These armatures 28 is partly visible in the drawing. These armatures 28 are pivotally mounted in neutral equilibrium via projections 31 formed thereon. The vertices of the porjections lie substantially on the plane formed by the closing edge of the armature.
  • spring band 29 which acts on the aforesaid projections 31, and is braced in recesses 30 of coil frame 1, the closing edge of the armature adjoining the shortcircuit yoke forms the pivot axis thereof.
  • a low-friction and properly positioned operating path for the armatures is ensured by means of projections 33 which are formed out of flanges 3 and 4 of coil frame 1.
  • the moving end of the arr natures is in each case shaped like a two-pronged fork, whereby prongs 37 are guided into openings of the flanges of the coil frame.
  • the openings are not described in detail but are clearly visible in the drawing.
  • the free ends of the armatures abut the base support of a U-shaped actuation card 22, over which contact spring sets of the relay are actuated indirectly on both sides of the axial center of the armatures.
  • the two disposed on one side of the relay are identified by 7 and 8, respectively, while of the two contact spring sets on the opposite side of the relay only the contact springs of the upper contact spring set are provided with reference numerals, i.e., 9, l0, and 11. All the contact spring sets are in each case inserted into channels 5 and 6, whereby the individual contact springs are held in set positions in self-clipping fashion without any attaching means. This is attained by inserting the contact springs into grooves l2, l3 and 14 within channels 5 and 6, whereby the grooves for the unmoving contact springs penetrate the entire length of insertion up to the mov ing end 18 of these contact springs.
  • the grooves for the moving contact springs extend only along a portion of the entire length of insertion of these contact springs, the latter having gradations l7 and 19 in adaptation thereto, so that their insertion is limited and at the same time the narrower free ends of these contact springs can move freely in the channel.
  • the necessary mechanical initial tension, as well as the mechanical positioning of the moving contact springs in their grooves, is effected by means of angled supporting tabs and 16, which are strutted on the inner wall of the grooves.
  • The-mechanical mounting support of the contact spring sets on the coil frame is ensured by a bottom plate '20 called a funnel plate having clearly visible stiffening ribs, not identified in the drawing.
  • This bottom plate 20 is pushed up on the soldering lugs of the contact springs and on the connecting elements 38 of winding 2 and removably locked in position in conventional manner with coil frame 1 via snap elements not identified in the drawing.
  • Actuation cards 22 are movably guided into two grooves 23 and 24 of the flange 3 or 4 of coil frame 1, whereby projections 25 which have been sprayed on to the flanges and which rise conically from the direction of insertion of the actuation cards and drop substantially at right angles to the flange plane, secure the inserted actuation cards undetachably in the coil frame.
  • Reference numeral 32 identifies the frame supports of flanges 3 and 4, which in the rest positions of armatures 28 form a stop means for the fork-shaped ends thereof.
  • Reference numeral 34 identifies gradations on prongs 37 of the fork-shaped end of armatures 28, which are supported on the actuation card, thus, preventing the armatures from drifting.
  • the closing edges 21 of. flanges 3 and 4 on which the moving contact springs 9 controlled directly by actuation card 22 are supported in their rest positions under initial tension, whereby the actuation cards can give way so that the armatures form a working air gap of predetermined size with the pole ends of magnet core 26.
  • Parts 36 are ribs which are again formed out on flanges 3 and 4 of coil frame 1 and which form limiting means for actuation cards 28 in their working position, that is, when relay armature 28 is tightened.
  • Reference numeral 35 identifies parts of the frontal side of flanges 3 and 4 pertaining to grooves 23 and 24 which contribute to an adequate sliding guide of the actuation cards.
  • an electromagnetic relay including a magnetic core enclosed by at least one exciting coil, short circuit yoke means arranged in parallel to the axis of said core, at least a pair of magnetically operating flat armatures in series with said magnetic core and said short circuit yoke means and contact spring means controlled mechanically by the armatures and wherein the armatures form with the magnetic core two working air gaps when the relay is not energized and actuate the contact spring means when the relay is energized, the improvement comprising:
  • a winding cylinder constructed to receive said magnetic core axially in the interior of said cylinder
  • coil frame means constructed from insulating material and having first and second flange members fixedly connected, one to the other, over said winding cylinder means,
  • contact spring means projecting above the movable ends of said armatures with at least one portion of said contact spring means being constructed as a return spring for restoring said armatures to'their rest positions and at least a pair of channel members extending laterally and parallel to the longitudinal axis of said armatures for seating said contact spring means.
  • actuation card means constructed from insulating material, for indirectly actuating said contact spring means for said armatures and means on said coil frame for slidably supporting said actuation card so that the latter can move in the direction of the armature stroke.
  • said actuation card support means includes guide grooves for receiving said actuation cards and wherein said actuation card means are of a generally U-shaped configuration, a portion of which serves as the area of contact with said armatures.
  • bottom plate means constructed from insulating material, fastened to said coil frame for support of said relay and for locking said contact spring means into position.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
US00232796A 1971-03-12 1972-03-08 Electromagnetic relay Expired - Lifetime US3801940A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712112085 DE2112085A1 (de) 1971-03-12 1971-03-12 Elektromagnetisches Relais

Publications (1)

Publication Number Publication Date
US3801940A true US3801940A (en) 1974-04-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00232796A Expired - Lifetime US3801940A (en) 1971-03-12 1972-03-08 Electromagnetic relay

Country Status (13)

Country Link
US (1) US3801940A (de)
AT (1) AT322003B (de)
BE (1) BE780524A (de)
BR (1) BR7201352D0 (de)
CH (1) CH543808A (de)
DE (1) DE2112085A1 (de)
FR (1) FR2128817B1 (de)
GB (1) GB1339872A (de)
IT (1) IT950059B (de)
LU (1) LU64941A1 (de)
NL (1) NL7202945A (de)
SE (1) SE385252B (de)
ZA (1) ZA721575B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101856A (en) * 1976-04-07 1978-07-18 Fritz Kolle Electrical switching relay construction and housing therefor
US4682133A (en) * 1985-08-14 1987-07-21 Siemens Aktiengesellschaft Electro-magnetic relay having two armatures

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407184C2 (de) * 1974-02-15 1982-09-02 Schaltbau GmbH, 8000 München Elektromagnetisches Relais mit zwei Ankern
DE2625203C3 (de) * 1976-06-04 1984-05-24 Hans 8024 Deisenhofen Sauer Polarisiertes elektromagnetisches Kleinrelais
DE2626752C2 (de) * 1976-06-15 1986-01-02 Brown, Boveri & Cie Ag, 6800 Mannheim Bistabiles, elektromagnetisches Kraftschaltglied kleiner Bauart
DE2647203C3 (de) * 1976-10-19 1984-09-20 Siemens AG, 1000 Berlin und 8000 München Elektromagnetisches Miniaturrelais
DE3414731C2 (de) * 1984-04-18 1986-03-20 Hengstler GmbH, Geschäftsbereich Haller-Relais, 7209 Wehingen Kleinstrelais
DE3530266A1 (de) * 1985-08-22 1987-03-05 Paul & Siedler Gmbh & Co Kg Elektromagnetisches relais
DE8524259U1 (de) * 1985-08-22 1988-03-24 Paul & Siedler Gmbh & Co Kg, 1000 Berlin Elektromagnetisches Relais
DE3545356C2 (de) * 1985-12-20 1997-04-10 Siemens Ag Sicherheits-Schaltrelais
DE3644172A1 (de) * 1986-12-23 1988-07-07 Bbc Brown Boveri & Cie Elektromagnetischer schalterantrieb fuer ein elektrisches schaltgeraet
DE3644113A1 (de) * 1986-12-23 1988-07-07 Bbc Brown Boveri & Cie Elektromagnetischer antrieb fuer ein schaltgeraet sowie herstellungsverfahren fuer einen anschlussbereit bestueckten spulenkoerper dieses antriebes
DE19502322C1 (de) * 1995-01-26 1996-05-09 Kloeckner Moeller Gmbh Klappanker-Magnetantrieb für elektrische Schaltgeräte und Verfahren zu seiner Vormontage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB302107A (en) * 1928-04-19 1928-12-13 Frank Whipp Improvements in automatic electric cut-in and cut-out switches for battery charging systems
US3184563A (en) * 1960-12-09 1965-05-18 Int Standard Electric Corp Magnetically controlled reed switching device
US3633135A (en) * 1969-05-30 1972-01-04 Tolefonaktiebolaget L M Ericss Electromagnetic relay

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB302107A (en) * 1928-04-19 1928-12-13 Frank Whipp Improvements in automatic electric cut-in and cut-out switches for battery charging systems
US3184563A (en) * 1960-12-09 1965-05-18 Int Standard Electric Corp Magnetically controlled reed switching device
US3633135A (en) * 1969-05-30 1972-01-04 Tolefonaktiebolaget L M Ericss Electromagnetic relay

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101856A (en) * 1976-04-07 1978-07-18 Fritz Kolle Electrical switching relay construction and housing therefor
US4682133A (en) * 1985-08-14 1987-07-21 Siemens Aktiengesellschaft Electro-magnetic relay having two armatures

Also Published As

Publication number Publication date
AT322003B (de) 1975-04-25
BE780524A (fr) 1972-09-11
FR2128817B1 (de) 1978-03-03
DE2112085A1 (de) 1972-09-14
SE385252B (sv) 1976-06-14
ZA721575B (en) 1972-12-27
GB1339872A (en) 1973-12-05
FR2128817A1 (de) 1972-10-20
LU64941A1 (de) 1972-07-07
NL7202945A (de) 1972-09-14
BR7201352D0 (pt) 1973-07-10
CH543808A (de) 1973-10-31
IT950059B (it) 1973-06-20

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