US3238341A - Modular electrical contact assembly - Google Patents

Modular electrical contact assembly Download PDF

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Publication number
US3238341A
US3238341A US333283A US33328363A US3238341A US 3238341 A US3238341 A US 3238341A US 333283 A US333283 A US 333283A US 33328363 A US33328363 A US 33328363A US 3238341 A US3238341 A US 3238341A
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United States
Prior art keywords
contact
module
pair
housing
contacts
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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
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US333283A
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English (en)
Inventor
John L Haydu
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.)
Allen Bradley Co LLC
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Allen Bradley Co LLC
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 to GB1053489D priority Critical patent/GB1053489A/en
Application filed by Allen Bradley Co LLC filed Critical Allen Bradley Co LLC
Priority to US333283A priority patent/US3238341A/en
Priority to FR999386A priority patent/FR1417889A/fr
Priority to CH1661464A priority patent/CH422112A/de
Priority to DK633864AA priority patent/DK113789B/da
Priority to SE15625/64A priority patent/SE304563B/xx
Priority to BE657587D priority patent/BE657587A/xx
Priority to DEA4800A priority patent/DE1283326B/de
Application granted granted Critical
Publication of US3238341A publication Critical patent/US3238341A/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
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
    • H01H11/0012—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches for converting normally open to normally closed switches and vice versa
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/503—Stacked switches

Definitions

  • This invention relates to a modular contact assembly for use in electrical controls and it more specifically resides in an assembly having a housing with stationary contacts fixed thereon, a reciprocably movable contact carrier mounted in the housing which supports movable contacts adapted for engagement with the stationary contacts, and mounting surfaces that permit for inversion of the assembly to have the contacts assume either normally open or normally closed positions.
  • FIG. 1 is a view in perspective of a contact module embodying the present invention
  • FIG. 2 is another view in perspective of the module of FIG. 1, but inverted in position from that shown in FIG. 1,
  • FIG. 3 is a side view in section of the module of FIG. 1 showing the contacts in a normally open condition and including operating mechanism associated with the module,
  • FIG. 4 is a side view in section of the module inverted from the position of FIG. 2 to have the contacts in a normally closed position
  • FIG. 5 is a view in section taken in the plane 5-5 designated in FIG. 3,
  • FIG. 6 is a side view in section of the module oriented as in FIG. 3, and with the contacts moved into closed position
  • FIG. 7 is a side view in section of two contact modules in tiered relation with the lower module being like the embodiment in FIGS. 1-6, and the upper module being a second embodiment mounted with its contacts normally closed,
  • FIG. 8 is a side view in section of the tiered arrangement shown in FIG. 7, with each of the contact modules being inverted,
  • FIG. 9 is a side view of a second group of tiered modules similar to those in FIG. 7, except that the operating springs are in an alternative form,
  • FIG. 10 is a view in perspective of a movable contact carrier and contact spanner like those in the various preceding embodiments, but modified by the inclusion of a liner,
  • FIG. 11 is a view in perspective of a liner that may be used in the movable contact carrier forming a part of the invention, and which is included in the contact carrier of FIG. 10,
  • FIG. 12 is a View in section of the movable contact carrier of FIG. 10 viewed through the plane 1212 designated in FIG. 13, and
  • FIG. 13 is an end view of the movable contact carrier of FIG. 10.
  • FIGS. 1 through 5 illustrate one preferred embodiment of the contact module of the present invention.
  • This module has a housing 1, molded from a suitable insulating material, comprising a pair of identical spaced side walls 2 joined by a pair of like ends 3 to define a contact chamber 4 that is open at both the top and bottom.
  • Each end 3 includes an inwardly extending stop wall 5 that lies between the side walls 2, to close 011 a portion of the contact chamber 4.
  • These stops are at the top of the housing 1 in FIGS. 1, 3 and 6, and at the bottom of the housing 1 in FIGS. 2 and 4.
  • the same housing 1 is depicted in each of these FIGS. 1-6, but in FIGS. 2 and 4 it is inverted, or upside down, from the orientation in the other figures, for the purpose of altering the normal position of the contacts, as will hereinafter be discussed.
  • Metal terminal strips 6 are riveted on the housing ends 3 which include stationary contacts 7 projecting into the contact chamber 4 in positions opposite the stop walls 5 to have a gap therebetween in which movable contacts may reciprocate.
  • the outer ends of the terminal strips 6 extend out beyond the housing ends 3 to present mounting surfaces 8 and 8' facing one direction, as particularly seen in FIG. 1, and mounting surfaces 9 and 9' facing the opposite direction, as seen in FIG. 2.
  • Mounting holes 19 are formed in the outer ends of the terminal strips 6 which pierce the mounting sunfaces 8, 8, 9 and 9', and through which terminal screws 11 may pass to anchor the contact module to a suitable support, such as represented by the posts 12.
  • the terminal screws 11 also serve to connect circuit conductors, such as indicated by the reference numerals 13, to the terminal strips 6.
  • a vertically movable contact carrier 14 that fits in suitable recesses in the side walls 2, so that reciprocating movement of the contact carrier 14 is guided in a straight line motion.
  • the contact carrier 14 reference is also made to FIGS. 10, 12 and 13. It is a unitary member molded from a satisfactory material which can be a phenolic condensation product, a nylon or other mater'ial, and it is box like in form with an actuator stem 15 extending from one end and a longer second actuator stem 16 extending fromthe opposite end.
  • the central box like section has a pair of spaced, upright guide Walls 17 joined at their top and bottom by a cross rib 18 that functions as a spring seat and by a saddle like rib 19 that functions as a movable contact seat.
  • the upright guide walls 17, the cross rib 18 and the saddle rib 19 form a contact cage having a lateral opening that receives a movable contact spanner 20 and a contact bias spring 21.
  • the spring is inserted between the spring seat formed by the cross rib 18 and the back of the contact spanner 20, to urge the spanner 20 against the saddle 19, and to create contact pressure with the stationary contacts 7 when the contacts are brought into engagement.
  • the saddle 19 has a convex configuration, and the contact spanner 20 is arched to conform with this configuration.
  • the ends of the movable contact spanner 20 project out from the contact carrier 14 into positions facing the stationary contacts 7, and they are captive between the stationary contacts 7 and the stop walls 5, to thereby retain the entire movable contact assembly as a part of the module.
  • the guide walls 17 of the contact carrier 14 are held in sliding relation with the recessed side walls 2 of the housing 1, and they also guide the movable contact spanner 20 in its motions toward and from contact closure with the stationary contacts 7.
  • the end of the lower actuator stem 16 rests upon a switch operator 22, which can be part of an electromagnet, a mechanically driven cam, or any other device that is to operate the contact module of the invention.
  • the operator 22 is in a raised, normal position in FIGS. 3 and 5, and in FIG. 6 it is shown in a lowered position.
  • Encircling the upper actuator stem 15 is a cup shaped collar 23 which receives the lower end of an operating spring 24.
  • the other end of the spring 24 seats against the ceiling of a spring compartment 25, which together with the collar 23 and operating spring 24 are a part of the same device as the switch operator 22.
  • the bottom end of the collar 23 bears against the cross rib 18 to urge the carrier 14 downward against the operator 22, and by having the actuator stem 15 of smaller cross section than the cage portion of the carrier 14 a shoulder is formed on the rib 18 against which the collar 23 may bear.
  • the contact carrier 14 With the operator 22 in its raised position the contact carrier 14 is likewise in its highest position, thus holding the movable contact spanner 20 above and out of engagement with the stationary contacts 7.
  • the contact bias spring 21 retains the contact spanner 20 against the saddle 19, and the operating spring 24 is compressed upward.
  • the reversibility of the contact module is made possible by the fact that the end of the downwardly pointed actuator stem 15 or 16 occupies the same position atop the operator 22. It follows that the upwardly pointed actuator stem 15 or 16 will also assume the identical position. As a consequence, in an inversion of the contact module the movable contact carrier 14 is inverted about a horizontal axis midway between the uppermost position that will be assumed by the upper actuator stem (15 or 16) and the lowermost position that will be assumed by the lower stem (15 or 16). This relationship is shown in FIG. 6, wherein the lowermost position of a stem end is in the plane P1, and the uppermost position of the upper stem is in the plane P2. These reference planes are referred to herein as the extreme positions of the stem ends of the contact carrier 14.
  • the axis of inversion for the contact carrier 14 is the line L1, perpendicular to the direction of motion of the contact carrier 14.
  • the imaginary reference line L1 bisects the housing 1, because the lengths of the actuator stems 15, 16 are so balanced, and the position of the fixed contacts 7 is so designed to achieve that arrangement.
  • FIGS. 7 and 8 illustrate another facet of the present invention that lends versatility to its use.
  • two contact modules are arranged in a tiered fashion, one above the other, to be actuated by the same operator 22.
  • the lower module is the same as that in FIGS. 1-6, and the upper module is a second embodiment similar in form, except that the mounting surfaces are inward of those of the lower module to adequately expose all the terminal screws 11.
  • the end portions 26 of the housings are of different configuration than the ends 3 of the housing 1 in FIGS. 1-6. This is to accommodate the mounting of terminal strips 27 that have short outer ends.
  • the terminal strips 27 are anchored to the ends 26 by means of hollow rivets 28 which present mounting holes for the associated terminal screws 11.
  • the rivets 28 present mounting surfaces 29 and 29 on one side of the housing and the terminal strips 27 provide mounting surfaces 30 and 31) on the opposite side of the housing. Also, the rivets 28 are in electrical engagement with the terminals 27, so that they function as a part thereof.
  • the positioning of the surfaces 29, 29 and 30, 30 with respect to an axis of inversion is the same as that described hereinabove for the first embodiment.
  • the surfaces 29, 29 are the same distance from an axis line midway between the extreme positions of the actuator stem ends as are the surfaces 30, 30'.
  • a spring cup 31 rests upon the upper end of the upper actuator stem 16 and receives an operating spring 32, which urges both the upper and lower contact carriers in a downward direction.
  • an operating spring 32 urges both the upper and lower contact carriers in a downward direction.
  • the lower actuator stem of the upper module abuts upon the upper actuator stem 15 of the lower module, so that the two contact carriers 14 are driven by a single operator 22 and the single operating spring 32.
  • the modules in FIG. 7 are each reversible, so they may each be arranged to provide either normally open or normally closed contacts as desired, and as particularly shown in FIG. 7 the lower module has normally open contacts, since its actuator stem 16 abuts on the operator 22, which in its normal position pushes the contact carrier 14 upward to disengage the contacts.
  • the upper module is mounted to provide normally closed contacts, its actuator stem 15 being on the lower side and in abutment with the upward projecting actuator stem 15 of the lower module, so that the actuator stem 15 of the lower module holds the contact carrier 14 of the upper module raised to place its contacts in closed position.
  • the actuator stem 16 of the upper module projects upward against the cup 31 to compress the operating spring 32. Hence, when the operator 22 is lowered the spring 32 moves both contact carriers 14 downward to open the upper contacts and close the lower contacts.
  • both of the modules are inverted from their positions in FIG. 7, so that the lower module provides normally closed contacts and the upper module provides normally open contacts. The operation is then exactly reversed from that described in connection with FIG. 7. Although it is not illustrated in the drawings, it is clear that both modules could be arranged to provide normally closed contacts, or both could be arranged to provide normally open contacts.
  • Modules arranged one above the other can also have individual operating springs, as shown in FIG. 9, instead of a sole operating spring 32 as shown in FIGS. 7 and 8.-
  • the parts in FIG. 9 are like that in FIGS. 3-6, and like reference numerals are applied.
  • the lower operating stem 15 of the upper module passes through the opening 33 in the lower spring compartment 25, so that the contact carriers engage one another and the operating spring assemblies are concentric with the stems of the carriers.
  • This construction in which stems of relatively small cross section extend from the contact carriers 14, provides working shoulders on the carriers 14 which the concentric operating springs may work against, so that one module may be tiered above another.
  • This particular feature, of individual operating springs also provides for uniform working forces for each module regardless of the number stacked above one another.
  • An example of the usefulness of this construction is illustrated in the copending application Serial No. 333,596, entitled Electromagnetic Relay.
  • FIGS. 10-13 there is shown a modification to the contact carrier 14 in which a formed metal liner 34 is fitted within the transverse opening between the guide walls 17.
  • the liner 34 covers the arched saddlerib 19 and the inside surfaces of the walls 17.
  • the movable contact spanner 20 is then guided by metal parts, which permit the manufacture of the carrier 14 to be from a resin such as nylon having non-brittle, tough qualities, but which may not be entirely desirable for withstanding the abrasive wear between the contact spanner 20 and the inner faces of the guide Walls 17.
  • the present invention provides a highly versatile modular contact assembly that is completely reversible, so as to provide normally open or normally closed contacts at the desire of the user. Only a minimum of effort is required to make the conversion. Also, a module of the present invention provides a very substantial improvement in the speed and ease with which contacts may be replaced for routine maintenance, or added to a bank of contacts for building up control circuits and the like. Having the terminals and the contacts confined in a self-contained module effectively separates the contacts from the actuating means, to provide greater versatility in the use of the contacts for a variety of switching applications.
  • a contact module comprising:
  • a housing including a pair of spaced side walls, a pair of end portions joining said side walls that have a depth less than the height of said side walls, and a pair of stop walls at the bottom extending inward from the end portions to define a contact chamber open at the top and with a lesser opening at the bottom;
  • a conductive terminal mounted on the top of each end portion with a stationary contact spaced from and facing one of said stop walls;
  • a slidable contact carrier mounted between said side Walls and through the lesser opening at the bottom for guided, reciprocating movement in the direction extending between said open top and bottom, said carrier having a contact cage with a lateral opening, a saddle rib forming a movable contact seat at its end closest to said stationary contacts, and a spring seat at its opposite end;
  • a movable contact spanner mounted in said lateral opening of said contact carrier and movable toward and from said contact seat, which contact spanner has a curved center portion that mates with said saddle rib and ends extending from the contact carrier which are inserted between said stop walls and said stationary contacts to bridge said stationary contacts upon engagement therewith and to move between contact closed and contact open positions upon reciprocation of said contact carrier;
  • a contact bias spring mounted in the contact cage of said contact carrier between said spring seat and said movable contact spanner to urge said saddle rib of the spanner against said movable contact seat;
  • a pair of conductive mounting surfaces forming upper and lower sides of each terminal with are disposed outward of said end portions with the surfaces of a pair of facing in opposite directions and being spaced apart a distance less than the height of said side walls, surfaces of a pair also having a common opening adapted to receive a terminal screw that both mounts the contact module and makes electrical engagement with a lead, the mounting surfaces of a pair also being parallel to and substantially equidistant from a reference axis perpendicular to the direction of said reciprocating movement and midway between the outermost positions of the ends of said actuator stems.
  • a housing including a pair of spaced side walls and a pair of ends joining said side walls;
  • a slidable contact carrier mounting within said housing between said side walls for guided, reciprocating movement and having a contact cage with an actuator stem extending from both the top and the bottom;
  • a movable contact spanner mounted in and overhanging from the cage of said contact carrier, which spanner is movable toward and from said stationary contacts to bridge between them upon engagement therewith and to move between contact closed and contact open positions upon reciprocation of said contact carrier;
  • each terminal a pair of conductive mounting surfaces forming upper and lower sides of each terminal which are disposed outward of said end portions with the surfaces of a pair facing in opposite directions and being spaced apart a distance less than the height of said side walls, surfaces of a pair also having a common opening extending thereth-rough, the mounting surfaces of a pair also being parallel to and substantially equidistant from a reference axis perpendicular to the direction of said reciprocating movement and midway between the outermost positions of the ends of said actuator stems.
  • a housing having a contact chamber open at the top and bottom;
  • a movable contact carrier reciprocably mounted in said contact chamber with a shoulder facing outward from each lower and upper end thereof and a stem protruding from each shoulder, the reciprocable movement of said carrier being between contact open and contact closed positions with one stem being at its remotest outer position from the contact chamber for each contact position;
  • mounting surfaces for the module comprising upper and lower surfaces of said thin metal terminal portion, which mounting surfaces are equi-spaced from a reference line that is midway between the remotest outer positions of said stems.
  • a lower module having:
  • a slidable contact carrier inserted in the housing for reciprocating motion therein, which carrier has an upper and lower stem protruding therefrom, such stems being of reduced cross section to form a working shoulder at the base of each stem;
  • a conductive terminal fixed on each end portion that extends endwise from the module and has a thickness less than the height of the housing to present upper and lower mounting surfaces on opposite sides thereof that are adapted to engage lead wires and receive a terminal screw that secures the module in place;
  • an upper module like said lower module oriented with the lower end of its lower stem resting upon the upper end of the upper stem of the lower module and with the mounting surfaces of its conductive terminals disposed inwardly of the mounting surfaces of the lower module;
  • each slidable contact carrier defines the upper and lower extent of the positions of the ends of said stems, and the mounting surfaces of each conductive terminal are equidistant from a horizontal line through a point midway between the upper and lower extent of the stem positions.
  • a contact carrier having a central box-like contact cage formed of a pair of spaced upright guide walls with an opening therebetween that are joined at one end by a cross rib and at the other end by a saddle rib that constitutes a contact seat; said contact carrier further having an actuator stem protruding from each rib which is of lesser cross section than the contact cage to form a working shoulder at the juncture of each stem with the cage;
  • a movable contact spanner inserted in said opening of said contact cage with contacts overhanging from the cage and with a center section formed to mate with said saddle rib for alignment with the contact carrier;
  • a contact bias spring inserted in said contact cage between said movable contact spanner and said cross rib which urges the movable contact spanner toward said saddle rib;
  • a module housing receiving said contact carrier that has:

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US333283A 1963-12-26 1963-12-26 Modular electrical contact assembly Expired - Lifetime US3238341A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB1053489D GB1053489A (is") 1963-12-26
US333283A US3238341A (en) 1963-12-26 1963-12-26 Modular electrical contact assembly
FR999386A FR1417889A (fr) 1963-12-26 1964-12-21 Jeu de contacts
DK633864AA DK113789B (da) 1963-12-26 1964-12-23 Kontaktelement, samt kontaktgruppe opbygget af sådanne elementer.
CH1661464A CH422112A (de) 1963-12-26 1964-12-23 Kontakteinrichtung
SE15625/64A SE304563B (is") 1963-12-26 1964-12-23
BE657587D BE657587A (is") 1963-12-26 1964-12-24
DEA4800A DE1283326B (de) 1963-12-26 1964-12-28 Wandelbare Kontakteinheit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US333283A US3238341A (en) 1963-12-26 1963-12-26 Modular electrical contact assembly

Publications (1)

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US3238341A true US3238341A (en) 1966-03-01

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US333283A Expired - Lifetime US3238341A (en) 1963-12-26 1963-12-26 Modular electrical contact assembly

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US (1) US3238341A (is")
BE (1) BE657587A (is")
CH (1) CH422112A (is")
DE (1) DE1283326B (is")
DK (1) DK113789B (is")
GB (1) GB1053489A (is")
SE (1) SE304563B (is")

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341672A (en) * 1964-03-13 1967-09-12 Westinghouse Electric Corp Enclosed circuit interrupting structure with improved latching mechanism
US3437773A (en) * 1967-08-24 1969-04-08 Cutler Hammer Inc Convertible electric switch module
US3517141A (en) * 1967-11-13 1970-06-23 Avis Ind Corp Limit switch
US3557332A (en) * 1967-10-05 1971-01-19 Erwin Fernandes Momentary pushbutton switch with bridging block, ramp and cam means
US3832657A (en) * 1973-07-30 1974-08-27 Gen Electric Industrial control relay
US4064381A (en) * 1976-02-18 1977-12-20 Westinghouse Electric Corporation Pushbutton switch assembly having floating type bridging contact and lost motion actuator
US4184134A (en) * 1978-08-14 1980-01-15 Clark Control, Inc. Electrical switching apparatus having convertible contact structure
US4195212A (en) * 1977-06-06 1980-03-25 Eaton Corporation Contactor having higher fault current withstandability
US4306123A (en) * 1979-02-21 1981-12-15 Taylor Glenn R Contact block
US4634819A (en) * 1984-06-20 1987-01-06 Mitsubishi Denki Kabushiki Kaisha Movable contact assembly for a switch
DE3628423A1 (de) * 1986-08-21 1988-02-25 Kloeckner Moeller Elektrizit Kontaktanordnung fuer elektrische schaltgeraete
US5260531A (en) * 1992-03-23 1993-11-09 Cooper Industries Explosion-proof switch with arc extinguishing gaseous byproduct venting feature and switch contact
DE19856678A1 (de) * 1998-12-04 2001-04-05 Moeller Gmbh Kontaktelement
US6822173B1 (en) 2000-06-07 2004-11-23 Moeller Gmbh Contact element

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8806472U1 (de) * 1988-05-17 1988-07-14 TRW Messmer GmbH & Co KG, 7760 Radolfzell Schalter, insbesondere Druckschalter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822450A (en) * 1955-05-20 1958-02-04 Square D Co Electric switch
US3105128A (en) * 1958-12-24 1963-09-24 Starkstrom Schaltgeratefabrik Electromagnetically operated reversible switch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419072A (en) * 1945-06-08 1947-04-15 Gen Electric Electric switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822450A (en) * 1955-05-20 1958-02-04 Square D Co Electric switch
US3105128A (en) * 1958-12-24 1963-09-24 Starkstrom Schaltgeratefabrik Electromagnetically operated reversible switch

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341672A (en) * 1964-03-13 1967-09-12 Westinghouse Electric Corp Enclosed circuit interrupting structure with improved latching mechanism
US3437773A (en) * 1967-08-24 1969-04-08 Cutler Hammer Inc Convertible electric switch module
US3557332A (en) * 1967-10-05 1971-01-19 Erwin Fernandes Momentary pushbutton switch with bridging block, ramp and cam means
US3517141A (en) * 1967-11-13 1970-06-23 Avis Ind Corp Limit switch
US3832657A (en) * 1973-07-30 1974-08-27 Gen Electric Industrial control relay
US4064381A (en) * 1976-02-18 1977-12-20 Westinghouse Electric Corporation Pushbutton switch assembly having floating type bridging contact and lost motion actuator
US4195212A (en) * 1977-06-06 1980-03-25 Eaton Corporation Contactor having higher fault current withstandability
US4184134A (en) * 1978-08-14 1980-01-15 Clark Control, Inc. Electrical switching apparatus having convertible contact structure
US4306123A (en) * 1979-02-21 1981-12-15 Taylor Glenn R Contact block
US4634819A (en) * 1984-06-20 1987-01-06 Mitsubishi Denki Kabushiki Kaisha Movable contact assembly for a switch
DE3628423A1 (de) * 1986-08-21 1988-02-25 Kloeckner Moeller Elektrizit Kontaktanordnung fuer elektrische schaltgeraete
US5260531A (en) * 1992-03-23 1993-11-09 Cooper Industries Explosion-proof switch with arc extinguishing gaseous byproduct venting feature and switch contact
DE19856678A1 (de) * 1998-12-04 2001-04-05 Moeller Gmbh Kontaktelement
DE19856678C2 (de) * 1998-12-04 2002-01-24 Moeller Gmbh Elektrische Schaltvorrichtung
US6822173B1 (en) 2000-06-07 2004-11-23 Moeller Gmbh Contact element

Also Published As

Publication number Publication date
BE657587A (is") 1965-04-16
DK113789B (da) 1969-04-28
DE1283326B (de) 1968-11-21
CH422112A (de) 1966-10-15
SE304563B (is") 1968-09-30
GB1053489A (is")

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