US3555230A - Contact isolating means for multipoled switch devices - Google Patents

Contact isolating means for multipoled switch devices Download PDF

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US3555230A
US3555230A US774917A US3555230DA US3555230A US 3555230 A US3555230 A US 3555230A US 774917 A US774917 A US 774917A US 3555230D A US3555230D A US 3555230DA US 3555230 A US3555230 A US 3555230A
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contact
extending
fixed contacts
spaced
pairs
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US774917A
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Edwin L Deck
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Siemens Electromechanical Components Inc
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AMF Inc
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/023—Details concerning sealing, e.g. sealing casing with resin
    • 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
    • H01H50/002—Details of electromagnetic relays particular to three-phase electromagnetic relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements

Definitions

  • This invention relates generally to multiple pole switching devices and more particularly to means forproviding isolation barriers between the various polesthereof to prevent arcing due to an ionized path.
  • the present invention is particularly adapted for multiple pole relays and will be described in this environment.
  • Relays of the type concerned have multiple sets or pairs of spaced contact terminals and a plurality of spring contact arms each movable into and out of engagement with each of the corresponding pair of contact terminals to provide a first connection in the operated positionof the relay and a second connection when the relay is unoperated.
  • pairs of contact terminals in relays are normally closely spaced side by side and under certain conditions, when a tendency for arcing exists at adjacent contact terminals, will cause arcing across the gap from one switching means to the adjacent switching means.
  • an object of the present invention is to provide contact isolation means between adjacent contact terminals of a multiple pole switching means which is removably applied as a separate portion thereto.
  • Another object of the present invention is to provide contact isolator means between adjacent contacts of a multiple pole switching means which is releasably mounted on the various contacts.
  • Another object of the present invention is to provide a contact isolator of the type described above which is retained in position by clamping between two portions of the casing of the switching means in which it is embodied.
  • the present invention contemplates a switching means including support means of a dielectric material; a plurality of contact means disposed in a laterally spaced series, each of the contact including a pair of fixed contacts extending frornthe support'means and being spaced from one another,
  • contact isolating means of a dielectric material and comprising common wall means extending lengthwiseacross at least all of the contact means spaced between the end contact means of the series on the side of the sameone of the contacts of the pairs of fixed contacts opposite from the contact arms, spaced contact isolating wall means disposed between adjacent spaced contact means and extending from the common wall means past the other of the contacts of the pairs of fixed contacts, all of the wall means extending from the support means to at least the ends of the pairs of fixed oontacts, and means for retaining the contact isolating means from movement relative to the pairs of fixed contacts.
  • FIG. 1 is a side elevational view of a relay embodying the present invention
  • FIG. 2 is an enlarged sectional view taken on line 2-2 of FIG. 1,
  • FIG. 3 is a further enlarged bottom plan view of the novel contact isolator when seen from line 3-3 of FIG. 2,
  • FIG. 4 is a view similar to FIG. 1 illustrating the header end of a relay with a modified form of contact isolator
  • FIGS. 5 and 6 are enlarged bottom plan and elevational views, respectively, of the contact isolator of FIG. 4.
  • a relay 10 is provided with a stator assembly 11 on which is pivotally mounted a spring biased armature assembly 12 within a cover or can 13 having an open end closed by a header 14.
  • the cover 13 has the usual indents for receiving detents 15 extending from opposite edges of the header 14 for releasably locking the two portions together.
  • the stator assembly 11 is mounted by a grounding member 17 to the inner surface 16 ot' the header 14 which supports a pair of terminal members 18 for an electromagnet to cause the armature 12 to pivot in the usual manner.
  • a plurality of contact means are provided in laterally spaced series each comprising a pair of fixed contact terminals in spaced face to face relationship and a contact arm which extends into the space therebetween and is movable into engagement with each of the fixed contact terminals.
  • the armature assembly 12 is provided with four spring contact arms 20, 20A, 20B and 20C in spaced series which extend between corresponding pairs of fixed contact terminals 21 and 22, 21A and 22A, 21B and 22B and 21C and 22C, respectively, which are supported by and extend through the support means or header 14.
  • the header 14 also supports terminal members 19, 19A, 19B and 19C which are connected by conductors (not shown) to the respective spring contact arms 20-20C.
  • a contact isolator means or member 30 is provided with a common or laterally disposed wall or wall means 31 extending across the pairs of fixed contact terminals 21A/22A and 218/228 between the end pairs of fixed contact terminals 21/22 and 2lC/22C of the series.
  • the common wall means 31 has a flange which extends from one end to the other providing a pair of U-shaped flanges or flange portions 36 and 36A between spaced adjacent isolating walls 34/34A and 34A/34B which also depend (as seen in FIGS. 1 and 2) from the common wall 31 between the adjacent pairs, of fixed contact terminals and end flanges or flange portions 37 and 37A extending laterally from the isolating walls 34 and 348, respectively.
  • the U-shaped flange portions 36 and 36A together with flange portion 37 extending from the isolating wall 34 to the fixed contact terminal 21 and the flange portion 37A extending from the wall 348 to the fixed contact terminal 21C are disposed adjacent the inner wall 16 of the header 14.
  • the U- shaped flange portions 36 and 36A define slots for receiving the portion of the fixed contact terminals 21A and 218,
  • the isolating walls 34, 34A and 34B extend past the fixed contact terminals 22, 22A, 22B and 22C and are provided at their ends adjacent to the inner wall 16 of the header 14 with pairs of flanges 35, 35A and 35B, respectively, which engage the fixed contact terminals 22 and 22A, 22A and 22B, and 22B and 22C. All of the wall portions of the contact isolating means 30, comprising the common wall 31 and the isolating walls 34, 34A and 34B, all extend from the header 14 to at least or beyond the ends of the fixed contact terminals 21, 21A, 21B, 22, 22A and 228.
  • the contact isolating means 30 is also provided with a tab 32 whichextends from the upper surface of the common wall 31 (as viewed in FIGS. 1 and 2) and along the adjacent edge of the header 14 and terminates in an enlarged free end portion formed by an outwardly extending lip or flange 33.
  • the tab 32 is disposed in a slot provided in one wall of the cover 13 and is spaced from the ends of the common wall 31 of the isolating means 30.
  • the edge'of the slotted wall of the cover 13 engages the lip 33 and urges the contact isolating means 30 towards the header 14 while the slotted wall engages the top of the common wall 31 on each side of the tab 32 urging the wall towards the plurality of contact means to retain the contact isolating means against movement relative to the various pairs of fixed contact terminals.
  • a modified contact isolating means or member 40 is shown in FIGS. 4, 5 and 6 and is provided with the common wall 41 and contact isolating walls 44, 44A and 4413 which correspond to the common wall 31 and the contact isolating walls 34, 34A and 348, respectively, of the contact isolating means 30.
  • the modified contact isolating means 40 is also provided with U- shaped flanges or flange portions 46 and 46A corresponding to flanges 36 and 36A, end flanges or flange portions 47 and 47A corresponding to flanges 37 and 37A, and flanges 45, 45A and 45B corresponding to flanges 35, 35A and 358.
  • the common wall 41 may be provided with a rearwardly extending tapered portion 42 at its upper end which is divided by central slot 43 in place of the tab 32 of the isolating means 353.
  • a modified cover or can 23 has one or more inwardly extending portions or projections 24 which engage the upper portion of the common wall 41 and urge the contact isolating means 40 towards the header 14.
  • the wall of the cover 23 with the portions 24 also engages the top of the common wall 41 to retain the contact isolating means 40 from movement relative to the various pairs of fixed contact terminals.
  • flange portions 47 and 47A may be provided with projections 48 and 48A, respectively, which engage the respective fixed contact terminals 21 and 21C to also retain the contact isolating means 40 from movement.
  • the projections 48 and 48A also may be provided on the flanges 37 and 37A of the isolating means 30.
  • novel switching means or relay or 10A can be fully assembled without its cover 13 or 23 and be properly adjusted without interference .from contact isolating means. Thereafter the contact isolating means 30 or 40 may be assembled in to the desired position therefor and the cover 13 or 23 is then provided to complete assembly.
  • each of said contact means including a pair of fixed contacts extending from said support means and being spaced from one another, and a contact arm extending between and being movable in to engagement with each of the fixed contacts;
  • spaced contact isolating wall means disposed between adjacent spaced contact means and extending from said common wall means past the other of the contacts of said pairs of fixed contacts;
  • said common wall means having projections extending from its ends each engaging said one of the fixed contacts of the adjacent contact means and on the same side thereof as said contact arm.
  • each of said contact means including a pair of fixed contacts extending from said support means and being spaced from one another, and a contact arm extending between and being movable into engagement with each of the fixed contacts;
  • spaced contact isolating wall means disposed between adjacent spaced contact means and extending from said common wall means past the other of the contacts of said pairs of fixed contacts;
  • said support means dispose andclosingthe open end of said cover; .7 I p H I said contact isolating means; g a tab extending from between the ends of said common wall means along an adjacent edge of said support means and terminating with an enlarged free end; and I one side of said cover having a slot for said tab, engaging the enlarged end of said tab at its open end and engaging said common wall means on both sides of said tab thereby urging said common wall means toward said support and contact means.
  • each of said contact means including a pair of fixed contacts extending from said support means and being spaced from one another, and a contact ann extending between and being movable into engagement with each of the fixed contacts; removable, contact isolating means of a dielectric material andcompn'sing: p j
  • each of. said contact isolating wall means having a pair of flanges at its end adjacent said support means and spaced from said common wall means;
  • each flange of each of said pairs of flanges extending from the side of said contact isolating wall means opposite from the other of said pair and engaging said other of the fixed contacts adjacent thereto.
  • each of said contact means including a pair of fixed contacts extending from said support means and being spaced from one another, and a contact arm extending between and being movable into engagement with each of the fixed contacts; removable contact isolating means of a dielectric material and comprising:
  • spaced contact isolating wall means disposed between adjacent spaced contact means and extending from said common wall means past the other of the contacts of said pairs of fixed contacts; all of said common wall means extending from said support means to at least the ends of said pairs of fixed contacts; means retaining said contact isolating wall means from movement relative to said pairs'ot fixed'contacts; said common wall means having a flange extending therefrom along said contact isolating wall means and adjacent said support means; and
  • said flange providing a Ll-shaped flange portion between each two adjacent contact isolating wall means defining a recess for the said one of the fixed contacts disposed in the space between said two adjacent contact isolating wall means, and end flange portions each extending laterally to engage the said one of the fixed contacts of a different one of raid contact means at the end of said series from the adjacent contact isolating wall means.
  • each of said end flanges having a projection extending therefrom engaging the same one of said one of the fixed contacts engaged by said end flange and on the side thereof opposite from said common wall means.
  • each of said contact isolating wall means having a pair of flanges at its end adjacent said support means and spaced from said common wall means;
  • each flange of each of said pairs of flanges extending from the side of said contact isolating wall means opposite from the other of said pair and engaging said other of the contacts adjacent thereto.
  • said support means disposed in and closing the open end of said cover
  • said contact isolating wall means having a tab extending from between the ends of said common wall means along an adjacent edge of said support means and terminating with an enlarged free end;
  • said support means disposed in and closing the open end of said cover
  • one side of said cover having a slot for said tab, engaging the enlarged end of said tab at its open end and engaging said common wall means on both sides of said tab thereby urging said common wall means toward said support and contact means.

Abstract

In switching means such as a relay having a plurality of spaced pairs of fixed contacts spaced from each other and a corresponding number of contact arms movable to engage each of corresponding pair of fixed contacts, and a removable insert of a dielectric material providing isolating walls between adjacent pairs of fixed contacts to prevent an ionized spark path therebetween.

Description

United States Patent 124, 189; ZOO/168A [56] References Cited UNITED STATES PATENTS 3,295,078 12/ 1966 Hrynewycz 335/ l 24 3,451,019 6/1969 Aver et a1. 335/201 Primary Examiner-I-I. 0. Jones AttgrneysGeorge W. Price and Charles J. Worth ABSTRACT: In switching means such as a relay having a plurality of spaced pairs of fixed contacts spaced from each other and a corresponding number of contact arms movable to engage each of corresponding pair of fixed contacts, and a removable insert of a dielectric material providing isolating walls between adjacent pairs of fixed contacts to prevent an ionized spark path therebetween.
CONTACT ISOLATING MEANS FOR MULTIPOLED SWITCH DEVICES This invention relates generally to multiple pole switching devices and more particularly to means forproviding isolation barriers between the various polesthereof to prevent arcing due to an ionized path.
The present invention is particularly adapted for multiple pole relays and will be described in this environment. Relays of the type concerned have multiple sets or pairs of spaced contact terminals and a plurality of spring contact arms each movable into and out of engagement with each of the corresponding pair of contact terminals to provide a first connection in the operated positionof the relay and a second connection when the relay is unoperated. I
The pairs of contact terminals in relays are normally closely spaced side by side and under certain conditions, when a tendency for arcing exists at adjacent contact terminals, will cause arcing across the gap from one switching means to the adjacent switching means.
Various isolating means have been tried to prevent such arcing and were found to be unsatisfactory because of the resulting limited areas between the barriers provided and/or because of the fragility of such barriers.
Accordingly, an object of the present invention is to provide contact isolation means between adjacent contact terminals of a multiple pole switching means which is removably applied as a separate portion thereto.
Another object of the present invention is to provide contact isolator means between adjacent contacts of a multiple pole switching means which is releasably mounted on the various contacts.
And another object of the present invention is to provide a contact isolator of the type described above which is retained in position by clamping between two portions of the casing of the switching means in which it is embodied.
The present invention contemplates a switching means including support means of a dielectric material; a plurality of contact means disposed in a laterally spaced series, each of the contact including a pair of fixed contacts extending frornthe support'means and being spaced from one another,
. and a contact arrn extending between and being movable into engagement with each of the fixed contacts; and contact isolating means of a dielectric material and comprising common wall means extending lengthwiseacross at least all of the contact means spaced between the end contact means of the series on the side of the sameone of the contacts of the pairs of fixed contacts opposite from the contact arms, spaced contact isolating wall means disposed between adjacent spaced contact means and extending from the common wall means past the other of the contacts of the pairs of fixed contacts, all of the wall means extending from the support means to at least the ends of the pairs of fixed oontacts, and means for retaining the contact isolating means from movement relative to the pairs of fixed contacts.
The foregoing and other objects and advantages of the invention will appear more fully hereinafter from a consideration of the detailed description which follows, taken together with the accompanying drawings wherein several embodiments of the invention are illustrated by way of example. It is to be expressly understood, however, that the drawings are for illustration purposes only and are not to be construed as defining the limits of the invention.
FIG. 1 is a side elevational view of a relay embodying the present invention,
FIG. 2 is an enlarged sectional view taken on line 2-2 of FIG. 1,
FIG. 3 is a further enlarged bottom plan view of the novel contact isolator when seen from line 3-3 of FIG. 2,
FIG. 4 is a view similar to FIG. 1 illustrating the header end of a relay with a modified form of contact isolator, and
FIGS. 5 and 6 are enlarged bottom plan and elevational views, respectively, of the contact isolator of FIG. 4.
Referring now to the drawings and particularly to FIGS. 1, 2 and 3, a relay 10 is provided with a stator assembly 11 on which is pivotally mounted a spring biased armature assembly 12 within a cover or can 13 having an open end closed by a header 14. The cover 13 has the usual indents for receiving detents 15 extending from opposite edges of the header 14 for releasably locking the two portions together. The stator assembly 11 is mounted by a grounding member 17 to the inner surface 16 ot' the header 14 which supports a pair of terminal members 18 for an electromagnet to cause the armature 12 to pivot in the usual manner.
A plurality of contact means are provided in laterally spaced series each comprising a pair of fixed contact terminals in spaced face to face relationship and a contact arm which extends into the space therebetween and is movable into engagement with each of the fixed contact terminals. More specifically the armature assembly 12 is provided with four spring contact arms 20, 20A, 20B and 20C in spaced series which extend between corresponding pairs of fixed contact terminals 21 and 22, 21A and 22A, 21B and 22B and 21C and 22C, respectively, which are supported by and extend through the support means or header 14. The header 14 also supports terminal members 19, 19A, 19B and 19C which are connected by conductors (not shown) to the respective spring contact arms 20-20C.
A contact isolator means or member 30 is provided with a common or laterally disposed wall or wall means 31 extending across the pairs of fixed contact terminals 21A/22A and 218/228 between the end pairs of fixed contact terminals 21/22 and 2lC/22C of the series. The common wall means 31 has a flange which extends from one end to the other providing a pair of U-shaped flanges or flange portions 36 and 36A between spaced adjacent isolating walls 34/34A and 34A/34B which also depend (as seen in FIGS. 1 and 2) from the common wall 31 between the adjacent pairs, of fixed contact terminals and end flanges or flange portions 37 and 37A extending laterally from the isolating walls 34 and 348, respectively. The U-shaped flange portions 36 and 36A together with flange portion 37 extending from the isolating wall 34 to the fixed contact terminal 21 and the flange portion 37A extending from the wall 348 to the fixed contact terminal 21C are disposed adjacent the inner wall 16 of the header 14. The U- shaped flange portions 36 and 36A define slots for receiving the portion of the fixed contact terminals 21A and 218,
respectively, adjacent the inner wall 16 of the header 14.
The isolating walls 34, 34A and 34B extend past the fixed contact terminals 22, 22A, 22B and 22C and are provided at their ends adjacent to the inner wall 16 of the header 14 with pairs of flanges 35, 35A and 35B, respectively, which engage the fixed contact terminals 22 and 22A, 22A and 22B, and 22B and 22C. All of the wall portions of the contact isolating means 30, comprising the common wall 31 and the isolating walls 34, 34A and 34B, all extend from the header 14 to at least or beyond the ends of the fixed contact terminals 21, 21A, 21B, 22, 22A and 228.
The contact isolating means 30 is also provided with a tab 32 whichextends from the upper surface of the common wall 31 (as viewed in FIGS. 1 and 2) and along the adjacent edge of the header 14 and terminates in an enlarged free end portion formed by an outwardly extending lip or flange 33. The tab 32 is disposed in a slot provided in one wall of the cover 13 and is spaced from the ends of the common wall 31 of the isolating means 30. The edge'of the slotted wall of the cover 13 engages the lip 33 and urges the contact isolating means 30 towards the header 14 while the slotted wall engages the top of the common wall 31 on each side of the tab 32 urging the wall towards the plurality of contact means to retain the contact isolating means against movement relative to the various pairs of fixed contact terminals.
A modified contact isolating means or member 40 is shown in FIGS. 4, 5 and 6 and is provided with the common wall 41 and contact isolating walls 44, 44A and 4413 which correspond to the common wall 31 and the contact isolating walls 34, 34A and 348, respectively, of the contact isolating means 30. The modified contact isolating means 40 is also provided with U- shaped flanges or flange portions 46 and 46A corresponding to flanges 36 and 36A, end flanges or flange portions 47 and 47A corresponding to flanges 37 and 37A, and flanges 45, 45A and 45B corresponding to flanges 35, 35A and 358.
The common wall 41 may be provided with a rearwardly extending tapered portion 42 at its upper end which is divided by central slot 43 in place of the tab 32 of the isolating means 353. As shown in FIG. 4, a modified cover or can 23 has one or more inwardly extending portions or projections 24 which engage the upper portion of the common wall 41 and urge the contact isolating means 40 towards the header 14. The wall of the cover 23 with the portions 24 also engages the top of the common wall 41 to retain the contact isolating means 40 from movement relative to the various pairs of fixed contact terminals.
As is best shown in FIG. 5, flange portions 47 and 47A may be provided with projections 48 and 48A, respectively, which engage the respective fixed contact terminals 21 and 21C to also retain the contact isolating means 40 from movement. The projections 48 and 48A also may be provided on the flanges 37 and 37A of the isolating means 30.
It should be readily understood that the novel switching means or relay or 10A can be fully assembled without its cover 13 or 23 and be properly adjusted without interference .from contact isolating means. Thereafter the contact isolating means 30 or 40 may be assembled in to the desired position therefor and the cover 13 or 23 is then provided to complete assembly.
Although several embodiments of the invention have been illustrated and described in detail, it is to be expressly understood that the invention is not limited thereto. Various changes may be made in the design and arrangement of the parts without departing from the spirit and scope of the invention as the same will now be understood by those skilled in the 3.11.
I claim:
1. In switching means including support means of a dielectric material and a plurality of contact means disposed in a laterally spaced series, each of said contact means including a pair of fixed contacts extending from said support means and being spaced from one another, and a contact arm extending between and being movable in to engagement with each of the fixed contacts; removable contact isolating means of a dielectric material and comprising:
common wall means extending lengthwise across at least all of said contact means spaced between the end contact means of said series and on the side of the same one of the contacts of said pairs of fixed contacts opposite from said contact arms;
spaced contact isolating wall means disposed between adjacent spaced contact means and extending from said common wall means past the other of the contacts of said pairs of fixed contacts;
all of said common wall means extending from said support means to at least the ends of said pairs of fixed contacts; means retaining said contact isolating means from movement relative to said pairs of fixed contacts; and
said common wall means having projections extending from its ends each engaging said one of the fixed contacts of the adjacent contact means and on the same side thereof as said contact arm.
2. In switching means including support means of a dielectric material and a plurality of contact means disposed in a laterally spaced series, each of said contact means including a pair of fixed contacts extending from said support means and being spaced from one another, and a contact arm extending between and being movable into engagement with each of the fixed contacts; removable contact isolating means of a dielectric material and comprising:
common wall means extending lengthwise across at least all of said contact means spaced between the end contact means of said series and on the side of the same one of the contacts of said pairs of fixed contacts opposite from said contact arms;
spaced contact isolating wall means disposed between adjacent spaced contact means and extending from said common wall means past the other of the contacts of said pairs of fixed contacts;
all of said common wall means extending from said support means to at least theendsofsjaid pair's offixed coiitacts;
means retaining said contact isolating means from movement relative to said pairs of fixed contacts; v
a hollow cover open atoneend housing said contact means;
said support means dispose andclosingthe open end of said cover; .7 I p H I said contact isolating means; g a tab extending from between the ends of said common wall means along an adjacent edge of said support means and terminating with an enlarged free end; and I one side of said cover having a slot for said tab, engaging the enlarged end of said tab at its open end and engaging said common wall means on both sides of said tab thereby urging said common wall means toward said support and contact means.
3. In switching means including support means of a dielectric material and a plurality of contact means disposed in a laterally spaced series, each of said contact means including a pair of fixed contacts extending from said support means and being spaced from one another, and a contact ann extending between and being movable into engagement with each of the fixed contacts; removable, contact isolating means of a dielectric material andcompn'sing: p j
common wall means extending lengthwise across'at'least all of said contact means spaced between the end contact means of said series and on the side of the same one of the contacts of said pairs of fixed contacts opposite from said contact arms; v I i spaced contact isolating wall means dispoied' between adjacent spaced contact means and extending from said common wall means past the other of the contacts of said pairs of fixed contacts; j
all of said common wall means extending from said support means to at least the ends of said pairs of fixed cdntacts; means retaining said contact isolating means from movement relative to said pairs of fixed contacts;
each of. said contact isolating wall means having a pair of flanges at its end adjacent said support means and spaced from said common wall means; and
each flange of each of said pairs of flanges extending from the side of said contact isolating wall means opposite from the other of said pair and engaging said other of the fixed contacts adjacent thereto.
4. in switching means including support means of a dielectric material and a plurality of contact means disposed in a laterally spaced series, each of said contact means including a pair of fixed contacts extending from said support means and being spaced from one another, and a contact arm extending between and being movable into engagement with each of the fixed contacts; removable contact isolating means of a dielectric material and comprising:
common wall means extending lengthwise across at least all of said contact means spaced between the end contact means of said series and on the side of thesame one of the contacts of said pairs of fixed contacts opposite from said contact arms; i
spaced contact isolating wall means disposed between adjacent spaced contact means and extending from said common wall means past the other of the contacts of said pairs of fixed contacts; all of said common wall means extending from said support means to at least the ends of said pairs of fixed contacts; means retaining said contact isolating wall means from movement relative to said pairs'ot fixed'contacts; said common wall means having a flange extending therefrom along said contact isolating wall means and adjacent said support means; and
said flange providing a Ll-shaped flange portion between each two adjacent contact isolating wall means defining a recess for the said one of the fixed contacts disposed in the space between said two adjacent contact isolating wall means, and end flange portions each extending laterally to engage the said one of the fixed contacts of a different one of raid contact means at the end of said series from the adjacent contact isolating wall means.
5. The switching means in accordance with claim 4; and each of said end flanges having a projection extending therefrom engaging the same one of said one of the fixed contacts engaged by said end flange and on the side thereof opposite from said common wall means.
6. The switching means in accordance with claim 4; and
each of said contact isolating wall means having a pair of flanges at its end adjacent said support means and spaced from said common wall means;
each flange of each of said pairs of flanges extending from the side of said contact isolating wall means opposite from the other of said pair and engaging said other of the contacts adjacent thereto.
7. The switching means in accordance with claim 6;
a hollow cover open at one end housing said contact means;
said support means disposed in and closing the open end of said cover;
one side of said cover having at least one projection extending inwardly therefrom; and
said one side and projection engaging adjacent sides of said common wall means and urging said common wall means toward said support and contact means.
8. The switching means in accordance with claim 6;
said contact isolating wall means having a tab extending from between the ends of said common wall means along an adjacent edge of said support means and terminating with an enlarged free end;
a hollow cover open at one end housing said contact means;
said support means disposed in and closing the open end of said cover; and
one side of said cover having a slot for said tab, engaging the enlarged end of said tab at its open end and engaging said common wall means on both sides of said tab thereby urging said common wall means toward said support and contact means.

Claims (8)

1. In switching means including support means of a dielectric material and a plurality of contact means disposed in a laterally spaced series, each of said contact means including a pair of fixed contacts extending from said support means and being spaced from one another, and a contact arm extending between and being movable in to engagement with each of the fixed contacts; removable contact isolating means of a dielectric material and comprising: common wall means extending lengthwise across at least all of said contact means spaced between the end contact means of said series and on the side of the same one of the contacts of said pairs of fixed contacts opposite from said contact arms; spaced contact isolating wall means disposed between adjacent spaced contact means and extending from said common wall means past thE other of the contacts of said pairs of fixed contacts; all of said common wall means extending from said support means to at least the ends of said pairs of fixed contacts; means retaining said contact isolating means from movement relative to said pairs of fixed contacts; and said common wall means having projections extending from its ends each engaging said one of the fixed contacts of the adjacent contact means and on the same side thereof as said contact arm.
2. In switching means including support means of a dielectric material and a plurality of contact means disposed in a laterally spaced series, each of said contact means including a pair of fixed contacts extending from said support means and being spaced from one another, and a contact arm extending between and being movable into engagement with each of the fixed contacts; removable contact isolating means of a dielectric material and comprising: common wall means extending lengthwise across at least all of said contact means spaced between the end contact means of said series and on the side of the same one of the contacts of said pairs of fixed contacts opposite from said contact arms; spaced contact isolating wall means disposed between adjacent spaced contact means and extending from said common wall means past the other of the contacts of said pairs of fixed contacts; all of said common wall means extending from said support means to at least the ends of said pairs of fixed contacts; means retaining said contact isolating means from movement relative to said pairs of fixed contacts; a hollow cover open at one end housing said contact means; said support means disposed in and closing the open end of said cover; said contact isolating means having a tab extending from between the ends of said common wall means along an adjacent edge of said support means and terminating with an enlarged free end; and one side of said cover having a slot for said tab, engaging the enlarged end of said tab at its open end and engaging said common wall means on both sides of said tab thereby urging said common wall means toward said support and contact means.
3. In switching means including support means of a dielectric material and a plurality of contact means disposed in a laterally spaced series, each of said contact means including a pair of fixed contacts extending from said support means and being spaced from one another, and a contact arm extending between and being movable into engagement with each of the fixed contacts; removable contact isolating means of a dielectric material and comprising: common wall means extending lengthwise across at least all of said contact means spaced between the end contact means of said series and on the side of the same one of the contacts of said pairs of fixed contacts opposite from said contact arms; spaced contact isolating wall means disposed between adjacent spaced contact means and extending from said common wall means past the other of the contacts of said pairs of fixed contacts; all of said common wall means extending from said support means to at least the ends of said pairs of fixed contacts; means retaining said contact isolating means from movement relative to said pairs of fixed contacts; each of said contact isolating wall means having a pair of flanges at its end adjacent said support means and spaced from said common wall means; and each flange of each of said pairs of flanges extending from the side of said contact isolating wall means opposite from the other of said pair and engaging said other of the fixed contacts adjacent thereto.
4. In switching means including support means of a dielectric material and a plurality of contact means disposed in a laterally spaced series, each of said contact means including a pair of fixed contacts extending from said support means and being spaced from one another, and a contact arm extending between and being movable into enGagement with each of the fixed contacts; removable contact isolating means of a dielectric material and comprising: common wall means extending lengthwise across at least all of said contact means spaced between the end contact means of said series and on the side of the same one of the contacts of said pairs of fixed contacts opposite from said contact arms; spaced contact isolating wall means disposed between adjacent spaced contact means and extending from said common wall means past the other of the contacts of said pairs of fixed contacts; all of said common wall means extending from said support means to at least the ends of said pairs of fixed contacts; means retaining said contact isolating wall means from movement relative to said pairs of fixed contacts; said common wall means having a flange extending therefrom along said contact isolating wall means and adjacent said support means; and said flange providing a U-shaped flange portion between each two adjacent contact isolating wall means defining a recess for the said one of the fixed contacts disposed in the space between said two adjacent contact isolating wall means, and end flange portions each extending laterally to engage the said one of the fixed contacts of a different one of said contact means at the end of said series from the adjacent contact isolating wall means.
5. The switching means in accordance with claim 4; and each of said end flanges having a projection extending therefrom engaging the same one of said one of the fixed contacts engaged by said end flange and on the side thereof opposite from said common wall means.
6. The switching means in accordance with claim 4; and each of said contact isolating wall means having a pair of flanges at its end adjacent said support means and spaced from said common wall means; each flange of each of said pairs of flanges extending from the side of said contact isolating wall means opposite from the other of said pair and engaging said other of the contacts adjacent thereto.
7. The switching means in accordance with claim 6; a hollow cover open at one end housing said contact means; said support means disposed in and closing the open end of said cover; one side of said cover having at least one projection extending inwardly therefrom; and said one side and projection engaging adjacent sides of said common wall means and urging said common wall means toward said support and contact means.
8. The switching means in accordance with claim 6; said contact isolating wall means having a tab extending from between the ends of said common wall means along an adjacent edge of said support means and terminating with an enlarged free end; a hollow cover open at one end housing said contact means; said support means disposed in and closing the open end of said cover; and one side of said cover having a slot for said tab, engaging the enlarged end of said tab at its open end and engaging said common wall means on both sides of said tab thereby urging said common wall means toward said support and contact means.
US774917A 1968-11-12 1968-11-12 Contact isolating means for multipoled switch devices Expired - Lifetime US3555230A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4923735U (en) * 1972-05-31 1974-02-28
EP0113440A1 (en) * 1982-12-07 1984-07-18 Siemens Aktiengesellschaft Electromagnetic relay
US4509027A (en) * 1982-09-23 1985-04-02 E.M.B. Corporation Current operated miniature relay
EP1120806A1 (en) * 2000-01-28 2001-08-01 ELESTA relays GmbH Safety relay, the use of such a relay and switching device with it
US6549108B2 (en) 2000-04-03 2003-04-15 Elesta Relays Gmbh Relay

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295078A (en) * 1964-12-16 1966-12-27 Guardian Electric Mfg Company Relay
US3451019A (en) * 1968-01-08 1969-06-17 Comar Electric Co Arc preventing means for a switching relay

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295078A (en) * 1964-12-16 1966-12-27 Guardian Electric Mfg Company Relay
US3451019A (en) * 1968-01-08 1969-06-17 Comar Electric Co Arc preventing means for a switching relay

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4923735U (en) * 1972-05-31 1974-02-28
JPS5318179Y2 (en) * 1972-05-31 1978-05-16
US4509027A (en) * 1982-09-23 1985-04-02 E.M.B. Corporation Current operated miniature relay
EP0113440A1 (en) * 1982-12-07 1984-07-18 Siemens Aktiengesellschaft Electromagnetic relay
EP1120806A1 (en) * 2000-01-28 2001-08-01 ELESTA relays GmbH Safety relay, the use of such a relay and switching device with it
US6661320B1 (en) 2000-01-28 2003-12-09 Elesta Relays Gmbh Relay
US6549108B2 (en) 2000-04-03 2003-04-15 Elesta Relays Gmbh Relay

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