US3731240A - Switching relay with a make-and-break contact member - Google Patents

Switching relay with a make-and-break contact member Download PDF

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Publication number
US3731240A
US3731240A US00211518A US3731240DA US3731240A US 3731240 A US3731240 A US 3731240A US 00211518 A US00211518 A US 00211518A US 3731240D A US3731240D A US 3731240DA US 3731240 A US3731240 A US 3731240A
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United States
Prior art keywords
contact
armature
combination
accordance
cup
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
US00211518A
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English (en)
Inventor
H Meyer
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 DE19702063886 external-priority patent/DE2063886C3/de
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3731240A publication Critical patent/US3731240A/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements

Definitions

  • the present invention relates to a switching relay with a make-and-break contact member acting as a bridging contact which, in two end positions, electrically connects to one another the center one and one of the outer ones of three stationary contact members arranged next to each other, and which is resiliently supported on an electrically non-conducting switching member which, in turn, is mounted to the armature and, together therewith, is capable of being moved into either one of the two end positions.
  • the invention is particularly needed in the case of heavy current relays performing the switching functions of a make-andbreak contact member.
  • the latter is designed as a resilient, tiltable ball or roller contact carried by an electrically non-conducting switching member cooperating with a lever arm arranged on the armature, thus permitting the switching member to swing into two end positions (German Printed application (DAS) l 251 437).
  • DAS German Printed application
  • This conventional type of switching relay owing to the employed tilting mechanism, is relatively expensive in manufacture. This is especially due to the required fork-shaped and angled-off parts, to the use of a swingably and tiltably supported switching member, and to the use of stops for restricting the swivel range. Moreover, such a tilting mechanism often requires an unwanted high excitation for operating the armature.
  • the make-and-break contact member comprises at least two oppositely arranged contact walls as well as a third contact wall extending vertically in relation thereto and which, in every position of the switching member, is resiliently applied to the center one of the stationary contact members, while inthe end positions ofthe switching member one of the oppositely arranged contact walls is pressed against one of the outer stationary contact parts which simultaneously restrict the swivel range of the switching member.
  • the switching relay according to the invention offers various advantages. As regards the manufacture, it combines all that is required for a quick and inexpensive mass production because only a small number and simple parts are used which, in addition thereto, can be assembled in the most simple way on the finished relay.
  • the make-and-break contact member is displaced in one plane almost parallel in relation to the contacting part of the center one of the contact members, thus resulting in a particularly small armature actuating force.
  • a further advantage results from the omission of special stops for limiting the swivel range of the make-andbreak contact member, because this limitation in the switching relay according to the invention is simultaneously effected by the two outer stationary contact members. Owing to the fact that in the switching relay according to the invention the make-and-break contact member performs a sliding movement on the stationary contact members during actuation of the switching member, the invention also achieves a self-cleaning of the contact parts.
  • FIGS. 1 to 4 of the accompanying drawings showing preferred examples of embodiment of the invention, and in which:
  • FIG. 1 partly in a sectional view, shows a switching relay according to the invention
  • P162 in a top view, shows the armature with the bridging contact of a switching relay according to the invention which is modified with respect to the one shown in FIG.1,
  • FIG.3 in a sectional view, shows details of the bridging contact shown in 1516.2
  • FIGA in a top view, shows the bridging contact of FIGS.
  • the driving system consists of the excitation coil 10, the magnet 20, and the armature 30 while the contact system is composed of the stationary contact members 40, 50, 60 and of the movable contact part, i.e. the make-and-break contact member 70.
  • the contact system is composed of the stationary contact members 40, 50, 60 and of the movable contact part, i.e. the make-and-break contact member 70.
  • Both of the these systems are combined mechanically and functionally.
  • the stationary contact members 40, 50, 60 together with the make-andbreak contact member form a make-and-break or switching contact.
  • These, as well as the connecting parts of the excitation coil 10 are advantageously pressed in a self-retarding manner into insertion holes provided in the baseplate 80, or are firmly connected to the baseplate by means of a subsequent deformation.
  • the portions of the stationary contact members 40, 50, 60 as projecting out of the baseplate and the (not shown) connecting parts of the excitation coil '10 are appropriately designed as connector terminals for mating with a printed circuit board.
  • an actuating system consisting of an electrically non-conducting switching member and of a spring element as mounted to the armature 30.
  • the switching member 90 is firmly connected at one end to a straight-lined flat or wire spring 100 while the free end of the switching member is in an operational connection with the make-and-break contact member 70.
  • make-and-break contact member 70 there is used a contact cup consisting at least on its outside of contact material, with this cup being engaged by the switching member 90 swingable with the armature 30, together with a loosely fitting plug-shaped member 91 in such a way that the contact cup, upon actuation of the switching member, is swiveled in direction towards one of the outer stationary contact members 40,50.
  • a contact cup consisting at least on its outside of contact material, with this cup being engaged by the switching member 90 swingable with the armature 30, together with a loosely fitting plug-shaped member 91 in such a way that the contact cup, upon actuation of the switching member, is swiveled in direction towards one of the outer stationary contact members 40,50.
  • the end positions of the contact cup 70 respectively one outer cup wall 71, 72 is in contact with one of the two oppositely arranged stationary contact members 40 or 50 while the bottom 73 of the contact cup is permanently and resiliently pressed against the center one of the stationary contact members (60).
  • the make-and-break contact member does not absolutely necessary for the make-and-break contact member to consist of a contact cup 70. In fact, it is sufficient to provide two oppositely arranged contact walls 71, 72 and a third contact wall 73 extending vertically in relation thereto, which is permanently and resiliently pressed against the center one of the stationary contact'members 60 or the contacting part 61 thereof respectively, whereas in the end positions of the switching member 90 one of the oppositely arranged contact walls 71, 72 is applied to one of the outer stationary contact members 40, 50 or the contacting parts 41, 51 thereof respectively.
  • the make-and-break contact member 70 may consist of a bracket having a U-shaped cross section whose U-shaped limbs 71, 72 are appropriately rounded in the transverse direction and whose U-shaped strap especially is arched towards the outside.
  • a contact cup or a U-shaped contact bridge it is possible, in general, to use a make-and-break contact member 70 at least two oppositely arranged contact walls 71, 72 as well as a third contact wall 73 extending vertically in relation thereto. This may also be accomplished in that there is used a body of insulating material having an almost U-shaped or rectangular cross section, hence a hollow or solid body of insulating material provided with contacting areas at the desired points, i.e.
  • the contact parts 41, 51 of the outer stationary contact members 40, 50 are used for directly restricting or limiting the swivel range of the switching member 90 or of the make-and-break contact member 70.
  • the contact members are convexly arched with respect to the outside wall 71, 72 of the make-andbreak contact member.
  • the contact cup 70 upon actuation of the switching member 90, 95 is moved about an axis extending vertically in relation to the centerline of the excitation coil 10, 15 and in relation to the plane of the magnetic core 21 or the magnet yoke 27 respectively.
  • the contact cup 70 upon actuation of the switching member 90, 95 is moved about an axis extending vertically in relation to the centerline of the excitation coil 10, 15 and in relation to the plane of the magnetic core 21 or the magnet yoke 27 respectively.
  • the armature 30 is movably mounted to the freely exposed end of the outer yoke limb 22 it will be seen that in the switching relay shown in FIGS.2 to 4 the armature 35 is hinged to the point 36 at the free end of the magnetic core 25.
  • the (operating) airgap 130 is lying in a plane extending almost vertically in relation to the centerline of the excitation coil 10, 15 and in relation to the plane of the magnetic core 21 or the magnet yoke 27 respectively.
  • the airgap 135 is respectively restricted by each time one free end piece 26, 37 of the outer yoke limb 27 or of thearmature 35 respectively which is bent vertically in relation .to the centerline of the excitation coil.
  • the airgap 135 has a relatively large cross-sectional area compared to its length, this having a reducing effect of rapid variations of the magnetic attractive force upon the armature during its movement.
  • the plug-shaped portion 96 of the switching member 95 by means of a flange-shaped hold member 97, is rotatably supported in the armature and eccentrically in relation to the centerline of the plug.
  • the hold member 97 which, for this purpose, is provided with a slot 98 for inserting a tool similar to a screw-driver, the airgap 135 can be varied; this is of particular importance in the case of burnings of the contact.
  • the size of the airgap 135 can be changed continuously when taking care that the hold member 97 of the switching plug 96 is tightly seated in a recess of the armature 35.
  • the switching member 95 is designed in the same way as the switching member 90 so that it does not need to be described in detail herein.
  • the abutment for the hold member 97 of the switching member 95 is formed by a helical compression spring 110 likewise guided in a recess 92 of the switching member, with this spring resting with one end on the edge of the contact cup 70 under spring tension. Since also the contact cup 70 of the switching relay shown in FIGS. 2 to 4 is designed in almost the same way as the one in the type of embodiment according to FIGJ, a further detailed explanation may also be omitted in this case.
  • a common baseplate 85 which, however, is designed in accordance with the arrangement of the driving system, the contact system, and the actuating system. It may in particular, have the shape shown in FIG.2. From this drawing it may be taken that for the reset spring element there are provided two spring seats of which the one is designed as a hole 39 and is arranged in the armature 35, while the other spring seat consists of an angledoff end piece 86 of either the baseplate 85 or a hold member 87 mounted thereto. Otherwise, the baseplate may consist of injection-pressed or injectionmolded plastics material with insertion holes shaped thereto for the stationary contact members 40, 50, 60 and a coil form 88 shaped thereto for taking up the excitation coil 15.
  • a switching relay including an electromagnet and an armature actuated thereby to move from a first position to a second position comprising in combination:
  • a make-and-break bridging contact including a pair of side contact walls and a connecting contact wall positioned transversely between said pair of side contact walls,
  • said resilient mounting means comprises:
  • a coil spring positioned between said plug member and said cup to bias said cup against said intermediate contact.
  • said relay includes a bifurcated magnet and an excitation coil wound around a first one of said bifurcations of said magnet and said armature is pivotally connected to the second bifurcation to swivel about an axis extending vertically in relation to the centerline of said excitation coil.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
US00211518A 1970-12-24 1971-12-23 Switching relay with a make-and-break contact member Expired - Lifetime US3731240A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19702063886 DE2063886C3 (de) 1970-12-24 Umschaltrelais
US21151871A 1971-12-23 1971-12-23

Publications (1)

Publication Number Publication Date
US3731240A true US3731240A (en) 1973-05-01

Family

ID=25760239

Family Applications (1)

Application Number Title Priority Date Filing Date
US00211518A Expired - Lifetime US3731240A (en) 1970-12-24 1971-12-23 Switching relay with a make-and-break contact member

Country Status (3)

Country Link
US (1) US3731240A (de)
AT (1) AT306838B (de)
FR (1) FR2119030B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3843944A (en) * 1972-03-22 1974-10-22 Siemens Ag Electromagnetic relay and free armature therefor
US4700162A (en) * 1986-04-07 1987-10-13 Niles Parts Co., Ltd. Contact mechanism of electrical contact pieces

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2914632A (en) * 1958-11-14 1959-11-24 Frank Scoby Relay
US2926229A (en) * 1957-03-04 1960-02-23 North American Aviation Inc Anti-chatter switching device
US3165607A (en) * 1961-08-11 1965-01-12 Ibm Armature for electro-magnetic relay

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926229A (en) * 1957-03-04 1960-02-23 North American Aviation Inc Anti-chatter switching device
US2914632A (en) * 1958-11-14 1959-11-24 Frank Scoby Relay
US3165607A (en) * 1961-08-11 1965-01-12 Ibm Armature for electro-magnetic relay

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3843944A (en) * 1972-03-22 1974-10-22 Siemens Ag Electromagnetic relay and free armature therefor
US4700162A (en) * 1986-04-07 1987-10-13 Niles Parts Co., Ltd. Contact mechanism of electrical contact pieces

Also Published As

Publication number Publication date
AT306838B (de) 1973-04-25
DE2063886A1 (de) 1972-07-13
FR2119030B1 (de) 1976-06-04
FR2119030A1 (de) 1972-08-04
DE2063886B2 (de) 1977-05-18

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AS Assignment

Owner name: ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE;REEL/FRAME:004718/0023

Effective date: 19870311