US3577182A - Switch-over contact arrangement for power relays - Google Patents

Switch-over contact arrangement for power relays Download PDF

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Publication number
US3577182A
US3577182A US799785A US3577182DA US3577182A US 3577182 A US3577182 A US 3577182A US 799785 A US799785 A US 799785A US 3577182D A US3577182D A US 3577182DA US 3577182 A US3577182 A US 3577182A
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US
United States
Prior art keywords
spring
contact
leg
free end
armature
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
US799785A
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English (en)
Inventor
Herbert Krautwals
Richard Siepmann
Helmut Moller
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
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Application granted granted Critical
Publication of US3577182A publication Critical patent/US3577182A/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
    • H01H50/54—Contact arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H01H50/58—Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature
    • 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
    • H01H50/043—Details particular to miniaturised relays
    • H01H2050/044—Special measures to minimise the height of the relay

Definitions

  • a first carrier plate lies in generally the same plane as the unbent portion of the contact spring and is below the bent contact spring while a second carrier plate is bent to lie above the unbent carrier spring whereby upon movement of the operating member a contact is made and a contact is broken.
  • the first leg has its free end portion bent out of the plane of the contact spring while the second leg remains generally in the plane of the contact spring.
  • First arid second carrier plates electrically insulated from said contact spring have an anchored end and a contact means carrying end with the means carrying the end of the first carrier plate lying below said first spring leg and the second carrier plate having its contact means carrying end bent out of the plane of the remainder of the second carrier plate and lying above the second spring leg portion.
  • a power relay plug-in base supports the contact spring, the carrier plate, an electromagnetic coil, a yoke, a yoke support, an armature stop and suitable connector prongs.
  • a protective cover may be attached to the body by suitable means such as a clip. ln practice we have found it advantageous to make the body member of a one-piece molded construction and to anchor the contact spring and the inner ends of the carrier plates directly into the body.
  • first and second leg portions are biased toward each other and securely grip the base portion of a U- shaped operating member which passes below the free end portion of the first leg and above the free end portion of the second leg. It is an important feature of this invention that the free end portions of the spring legs have laterally projecting portions which extend towards each other in their respective planes so that the laterally projecting portion of the first leg lies above the laterally projecting portion of the second leg.
  • Upstanding arms at each end of the base portion pass' through holes in the base portion of a U-shaped armature.
  • the U-shaped armature partially encircles one end of an electromagnetic coil with the free ends of the armature arms being connected to a spring-biasing means which acts to pivot the armature about the arm free ends and bias the armature base end upwardly against a stop member.
  • the armature base end is also biased upwardly by the second leg of the contact-spring working through the operating arm. In this position the second spring leg free end portion contacts the bent portion of the second carrier plate to make electrical contact whereas the first spring leg free end portion will not be contacting the first carrier-plate portion.
  • the electromagnetic field When the coil is energized the electromagnetic field will drive the base portion of the armature toward the yoke and thus move the operating member downwardly in a direction generally perpendicular to the contact spring and the carrier plate whereby the second contact is broken and the first contact between the first spring leg portion and the first carrier plate is made.
  • the free end portion of the first spring leg has a hole therethrough which receives an upstanding projection on the operating member. In this very simple manner the operating member is held in position between the spring legs.
  • FIG. 1 is an elevational side view with parts in cross section and with the side portion of the cover removed to illustrate a low profile power relay device embodying the present invention
  • FIG. 2 is an elevational end view as the structure of FIG. 1 would be seen in a section along the lines ll-ll;
  • HO. 3 is an enlarged perspective view of the details of the contact arrangement with parts broken away;
  • FlG. 3a is plan view of just the bifurcated end portion of the contact spring illustrating the overlap of the portions thereof;
  • FIG. 3b is an end elevational view of the structure of FIG. 30 again illustrating the overlap portions of the contact spring legs.
  • a body 1 may be molded of insulating material and may be attached to a plug-inbase B to support the component elements of the power relay.
  • a protective cover A may be attached to the body 1 by any convenient means such as for example a clip 1a.
  • Other body portions which may be separately or integrally formed include an armature stop 1b and a yoke support 1c as will hereinafter be described in greater detail.
  • a first carrier platela may be best seen in FIG. 3 where it is shown projecting from the molded insulating body 1.
  • first carrier plate is of an L-shaped configuration having a first end Zaa anchored in the insulating body 1 and a second end 2ab projecting inwardly generally toward a centerline of the body and supporting a contact means 3 on its upper surface.
  • a second carrier plate 2b also may be generally L-shaped having a first end 2ba anchored in the insulating body 1 and second end 2bb being bent out of the plane of the remainder for the second carrier plate 2b and carrying a contact means 4 on its lower surface.
  • the distance which the second carrier plate portion Zbb is bent out of the plane of the remainder of the plate 2b is represented by the reference symbol a as shown in FIG. 3
  • Each of the anchored ends of -the carrier plates is suitably connected into the electrical circuits in which the power relay operates.
  • a contact spring member 5 is supported in a usual manner on the body 1 and has its free end bifurcated by means of a slot in the free end to provide juxtaposed first spring leg portion 5a and second spring leg portion 5b.
  • the first spring leg portion 5a has a free end portion 5ab bent out of the plane of the contact spring 5 by means of portion Saa.
  • a contact means 6 is provided in the undersurface of the free end portion Sub.
  • a laterally projecting portion Sac is integral with the free end portion Sab and extends towards and over a similar portion of the second contact spring leg 5b.
  • the second contact spring leg portion 512 is generally in the plane of the contact spring 5 and has an outer free end Sba from which there extends a laterally projecting portion Sbb.
  • the portion 5bb underlies the laterally extending portion Sac.
  • a contact means. 7 is supported on the leg 5b at a position below the contact means 4 on the second carrier plate.
  • FIGS. 3a and 3b An examination of FIGS. 3a and 3b clearly shows the overlapping of the laterally projecting portions Sac and Sbb.
  • a distance b represents the overlap which will vary in individual constructions depending on the differences in forces f and f in the spring legs 5a and 5b, respectively. In the area of overlap these forces operate against one another and are thereby substantially neutralized.
  • the portion Sbb may extend a distance equal to or less than the width of a slot 50 and the length of portion Saa may be greater than the length of Sac or Sbb so that the portions Sac and Sbb may be integrally formed without waste of any spring material.
  • An operating member 8 having a U-shaped configuration when seen in elevation has a base portion 8a underlying the first contact spring leg free end portion 5ab laterally projecting portion Sac and overlying the free end portion Sba and laterally extending portion Sbb of the spring leg 5b.
  • the first spring leg free end portion Sab has a hole Sad therethrough which receives therethrough a projection 8d upstanding from the base portion of the operating member 8.
  • the first and second legs 5a 5b are biased in a vertical direction towards one another so that their free ends hold the operating member base 80 in a pincerlike manner to grip it securely against movement.
  • a cutout portion Baa acts to further limit any lateral movement of the first leg or the operating member 8.
  • a second cutout Sab is provided to allow access to the second contact shown by contact means 4and 7.
  • Upstanding arms 8b and Be at each end of the base portion 8a pass through holes 9b and 90 respectively in the base portion 90 of the a U-shaped armature 9.
  • widened portions 8bb and 8cb are provided in support of the operating member for the armature.
  • Arms 9d and 9e extend from each end of the armature base 9a to partially encircle one end of an electromagnetic coil 11.
  • the free ends of the armature arms 9d and 9e are connected to a spring-biasing means 9f which acts to pivot the armature about the arm free ends and bias the armature base end upwardly against the stop member lb.
  • the armature base end is also biased upwardly by the second leg 5b of the contact spring 5 working through the operating am 8.
  • the yoke 10 is centrally positioned with respect to the coil 11 by the body 1 in the forward yoke support its.
  • a compact electrical contact arrangement comprising a generally planar single unitary contact spring having a movable free end, said contact spring being slotted at its free end to form adjacent first and second legs, said first leg having a free end bent out of the plane of the contact spring and said second leg having its free end generally in the plane of said contact spring.
  • first and second carrier plates electrically insulated from said contact spring and each having a contact means carrying end, said contact means carrying end of said first carrier plate lying below said first spring leg and said second carrier plate having its contact means carrying end bent out of the plane of said corner plate and lying above said second spring leg portion said contact spring and said carrier plates lying in substantially the same plane.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Contacts (AREA)
US799785A 1968-02-19 1969-02-17 Switch-over contact arrangement for power relays Expired - Lifetime US3577182A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH247068A CH486767A (de) 1968-02-19 1968-02-19 Leistungsrelais geringer Bauhöhe mit Umschaltkontaktanordnung

Publications (1)

Publication Number Publication Date
US3577182A true US3577182A (en) 1971-05-04

Family

ID=4234529

Family Applications (1)

Application Number Title Priority Date Filing Date
US799785A Expired - Lifetime US3577182A (en) 1968-02-19 1969-02-17 Switch-over contact arrangement for power relays

Country Status (6)

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US (1) US3577182A (US20020095090A1-20020718-M00002.png)
BE (1) BE728629A (US20020095090A1-20020718-M00002.png)
CH (1) CH486767A (US20020095090A1-20020718-M00002.png)
DE (1) DE1908269A1 (US20020095090A1-20020718-M00002.png)
FR (1) FR1599966A (US20020095090A1-20020718-M00002.png)
GB (1) GB1207104A (US20020095090A1-20020718-M00002.png)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5814440A (ja) * 1981-07-20 1983-01-27 株式会社高見澤電機製作所 電磁継電器
JPS6092432U (ja) * 1983-11-30 1985-06-24 松下電工株式会社 電磁継電器
DE3520773C1 (de) * 1985-05-29 1989-07-20 SDS-Relais AG, 8024 Deisenhofen Elektromagnetisches Relais
DE19715914C1 (de) 1997-04-16 1998-10-08 Eh Schrack Components Ag Elektromechanisches Relais
DE19715913C1 (de) * 1997-04-16 1998-10-08 Eh Schrack Components Ag Elektromagnetisches Relais

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1721012A (en) * 1928-01-03 1929-07-16 John J Fagan Thermostat

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1721012A (en) * 1928-01-03 1929-07-16 John J Fagan Thermostat

Also Published As

Publication number Publication date
GB1207104A (en) 1970-09-30
BE728629A (US20020095090A1-20020718-M00002.png) 1969-08-19
DE1908269A1 (de) 1969-09-04
DE1908269B2 (US20020095090A1-20020718-M00002.png) 1970-11-05
CH486767A (de) 1970-02-28
FR1599966A (US20020095090A1-20020718-M00002.png) 1970-07-20

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