US2105604A - Electromagnetic overload circuit breaker - Google Patents

Electromagnetic overload circuit breaker Download PDF

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Publication number
US2105604A
US2105604A US700579A US70057933A US2105604A US 2105604 A US2105604 A US 2105604A US 700579 A US700579 A US 700579A US 70057933 A US70057933 A US 70057933A US 2105604 A US2105604 A US 2105604A
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US
United States
Prior art keywords
lever
bell crank
toggle
windings
contacts
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
US700579A
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English (en)
Inventor
Leyhausen Wilhelm
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2105604A publication Critical patent/US2105604A/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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/38—Electromagnetic mechanisms wherein the magnet coil also acts as arc blow-out device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
    • H01H73/38—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by lever

Definitions

  • This invention relates to an electro-magnetic overload circuit breaker in which the circuit is broken between the end faces of two magnetic coils, the spark gap being formed by fire-proof 5 partitions which separate the contacts from the coils and protect against flashing over of the breaking spark.
  • Co'nstructions'oi such circuit breakers are already known in-which the release is effected by an armature which is attracted by the two separate magnet coils. The attracting force of the magnet coils is at the same time extremely weak, so that the release can only be causedat a multiple of the nominal current strength.
  • At least one of the magnet coils has a plunger which communicates with the releasing device on the side remote from the magnet coils.
  • Fig. 1 shows the circuit breaker partly in side coil d is provided with a plunger 1.
  • This latter is connected to a bell-crank lever g the free end of which canact upon the switching mechanism h.
  • the connection between the switching -mechanism and the contacts has been omitted from the drawing for the sake of clearness.
  • the contacts a and b touch one another. If the current exceeds a certain strength, the plunger f is attracted causing the bell crank lever g to strike against the switching mechanisms whereby the switch is moved into the cutting out position. The are forming between the contacts is extinguished by the magnet coils.
  • By fitting a spring counteracting the force of attraction of the coil 11 on the plunger f the strength of the switching out current can be regulated in known manner.
  • the iron strap e is extended to form an iron frame 1', which serves at the same time for fixing the system on a base s.
  • the bell crank lever g in Fig. 2 is made of iron and one of its arms, to whicn the plunger is fixed, forms a part of the frame 1.
  • the frame 1' may be entirely closed and the bell-crank lever g and plunger 1 constructed as illustrated in Fig. 1.
  • the contacts a and b are resiliently mounted on the base s and a contact bridge u is arranged opposite the contacts on a switch bar t.
  • a toggle lever system consists of a bell crank lever is, p of a-lever l pivotally mounted on a rigid pin n, of two links it, i forming a toggle lever and pivotally connected with each other by a pivot pin 0, the lever arm 72. connected with the arm k of the bell crank lever by a pivot pin m and the lever i with the lever l by a pivot pin 1i.
  • the arm 1) of the bell crank lever is pivoted on a pivot pin n fixed on the switch bar t the lever being pivotally mounted on the pivot pin 0.
  • the arm p of the bell crank lever is influenced by a spring q and pressed against an abutment w. m
  • the device is of particular importance because the movement of the releasing lever can be limited to the smallest size so that the switching speed is increased and the magnet parts can be placed in the most favorable position from the outset.
  • the levers k and Z are of the same length and also the two links it and i of the toggle lever. During the switching in movement the pivot pin m must therefore approach and move away from the engaging surface of the releasing lever g in the same proportion as the pivot pin 12' moves away from and approaches the same.
  • the device can be constructed so that the pivot pin 0, during the switching in operation changes its distance from the releasing lever g to a predetermined extent, being desirable in certain instances.
  • the bell crank lever is, p is also of particular importance forthe device.
  • i By suitably shaping and arranging the same the horizontal movement of the toggle lever h, i can impart a vertical movement to the switch bar i, so that the switch may be of compact construction and space and material is saved.
  • the automatic breaking of the circuit is effected as follows.
  • the device is shown in circuit closing position by dotted lines in Fig. 3. If a short-circuit or an overload occurs, the lever o presses against the pivot pin 0.
  • Both coils instead of only one may be provided with plungers if a stronger force is necessary for the releasing.
  • the magnet core of the coils may likewise be divided and one part thereof be fixed whereas the other part forms the plunger.
  • said transfer means including a toggle, a pivoted arm linked to one end of the toggle, a bell crank lever connected to the other end of the toggle, and a switch bar fastened to the free end of the said bell crank lever and displaceable crosswise of the axis of the coils.
  • a release mechanism consisting of a toggle, an electro-magnetically controlled bell crank for breaking said toggle, one arm of said bell crank lever being connected to be actuated by energization of one of said magnets, a pivoted arm equal in length to the other arm of said bell crank, said pivoted arm and said other arm of said bell crank being connected together by means of said toggle, whereby the joint of the toggle is uniformly distant from the electromagnetically controlled bell crank lever in all positions of the toggle while its arms are in alinement.
  • a pair of axially alined and spaced magnet windings circuit contacts between the adjacent ends of the windings, one of said contacts being fixed and a second of said contacts'being movable transversely of the field between said windings, a frame magnetically connecting the remote ends of said windings, a lever having one end'pivoted to the frame and projecting upwardly therefrom,
  • a bell crank lever pivoted at its angle to said to said frame and having one arm below the joint of the toggle and its other arm depending across the remote end of one of said windings, and a magnetic core in the last mentioned winding and connected to the depending arm of the second bell crank lever, said links being of equal length and the lever arms to which the ends of the toggle is connected being also of equal length.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Electromagnets (AREA)
US700579A 1933-10-18 1933-12-01 Electromagnetic overload circuit breaker Expired - Lifetime US2105604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL84649D DE636718C (de) 1933-10-18 1933-10-18 Elektromagnetischer UEberstromschalter

Publications (1)

Publication Number Publication Date
US2105604A true US2105604A (en) 1938-01-18

Family

ID=6477259

Family Applications (1)

Application Number Title Priority Date Filing Date
US700579A Expired - Lifetime US2105604A (en) 1933-10-18 1933-12-01 Electromagnetic overload circuit breaker

Country Status (5)

Country Link
US (1) US2105604A (enrdf_load_stackoverflow)
BE (1) BE399644A (enrdf_load_stackoverflow)
DE (1) DE636718C (enrdf_load_stackoverflow)
FR (1) FR777270A (enrdf_load_stackoverflow)
GB (1) GB426999A (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE950391C (de) * 1938-10-11 1956-10-11 Siemens Ag Elektromagnetisches Geraet
DE744559C (de) * 1940-08-15 1944-01-20 Wilhelm Leyhausen Kleinselbstschalter
DE740958C (de) * 1940-11-10 1943-11-01 Ing Karl Kesl UEberstromschalter in Trennschalterform
DE751583C (de) * 1941-03-02 1951-10-29 Wilhelm Leyhausen Kleinselbstschalter
DE957322C (de) * 1952-02-02 1957-01-31 Sursum Elek Zitaets Ges Leyhau Magnetsystem fuer elektrische Selbstschalter
DE1092544B (de) * 1954-01-28 1960-11-10 Licentia Gmbh Schaltgeraet, insbesondere Installationsselbstschalter
FR1209706A (fr) * 1958-08-30 1960-03-03 Dispositif de commande électromagnétique
DE29917960U1 (de) 1999-10-12 1999-12-30 Kuhnke GmbH, 23714 Malente Elektromagnetischer Aktor, insbesondere Proportionalmagnet

Also Published As

Publication number Publication date
BE399644A (enrdf_load_stackoverflow) 1933-12-30
DE636718C (de) 1936-10-13
FR777270A (fr) 1935-02-14
GB426999A (en) 1935-04-12

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