US3818170A - Contact bridge - Google Patents

Contact bridge Download PDF

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Publication number
US3818170A
US3818170A US00313997A US31399772A US3818170A US 3818170 A US3818170 A US 3818170A US 00313997 A US00313997 A US 00313997A US 31399772 A US31399772 A US 31399772A US 3818170 A US3818170 A US 3818170A
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US
United States
Prior art keywords
burnoff
pieces
contact
contact bridge
end faces
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
US00313997A
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English (en)
Inventor
S Seidel
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 US3818170A publication Critical patent/US3818170A/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
    • 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
    • H01H1/20—Bridging contacts

Definitions

  • a contact bridge which includes a traylike structure having a bottom wall and a composite rim at the perimeter of the bottom wall.
  • the structure vis made from a bendable flat member consisting of a central portion and at least two margin strips integral with the central portion. The margin strips are bent along lines coincident with respective portions of the perimeter and configured to conjointly form the composite rim.
  • Contact overlays are mounted on respective portions of the outer side of the bottom wall of the tray-like structure.
  • the contact bridge is simple to manufacture and has a relatively high strength.
  • the invention relates to a tray-shaped contact bridge with contact overlays applied to the outside of the tray bottom.
  • the invention then provides a tray-shaped contact bridge which is simple to manufacture and which has relatively high strength.
  • the tray-shaped contact bridge of the type mentioned above is made utilizing a flat member, the wall of the tray being formed by bent-up strips of the flat member.
  • a feature of the contact bridge of the invention is a tray-like structure having a bottom wall and a composite rim at the perimeter of the bottom wall.
  • the structure is made from a bendable flat member consisting of a central portion and at least two margin strips integral with the central portion. The margin strips are bent along lines coincident with respective portions of the perimeter and configured to conjointly form'the composite rim.
  • Contact overlays are mounted on respective portions of the outer side of the bottom wall of the traylike structure.
  • the central portion is longitudinally extended and defines a longitudinal axis.
  • the margin strips can be two in number and extend in the direction of this axis.
  • burnoff pieces can be soldered advantageously, so that the separation point of the end face halves are covered over.
  • a contact overlay protruding beyond the end faces can support the arc burnoff piece and can be soldered to it.
  • the flat member can be sheared for this purpose at the separation line between the margin strips and the central portion.
  • the shearing can advantageously also be made so that for the bent condition of the margin strips balcony-like projections of the flat member are provided outside the tray.
  • Another feature of the invention therefore provides that the flat member is sheared determined distances along lines coincident with respective portions of the perimeter of the bottom wall of the tray-like structure so as to cause the longitudinal end regions of the central portion to extend out past the end faces to form balcony-like projections when the corresponding end portions of the margin strips are bent toward each other.
  • the balcony-shaped projections themselves can serve as the arc burnolf piece, so that the resistance against material removal by the arc is increased.
  • burnoff pieces are mounted on the balcony-like projections so as to lie on the rim of the tray-like structure.
  • the mass and the material of the arc bumoff pieces can be matched to the desired requirements independently of the strength of the contact bridge itself.
  • An arc burnoff piece made of aluminum has been found advantageous, particularly in view of the reduced weight obtained therewith; this in turn reduces the tendency to chatter.
  • the sharp-edged, balcony-shaped projection permits, in addition, the arc bumoff piece and the contact overlays to be soldered on in a simple manner because the sharp edges of the balcony-shaped projections effect a self-acting alignment of these parts in the soldering process.
  • the abutting ends of the margin strips can also be soldered together. It is not necessary to solder the burnoff pieces if they are force-lock held by being pressed against the balconyshaped projection by a contact pressure spring. This configuration permits replacement of the arc burnoff pieces, so that they, in turn, can be made smaller, commensurate with their weight and in view of the required service life.
  • FIG. 1 is a side elevation view of a contact bridge according to the invention and is equipped with a contact pressure leaf spring inserted therein. The view also shows on the right-hand side how the contact bridge can be provided with balcony-shaped projections according to a subsidiary embodiment.
  • FIG. 2 is a plan view from above of the contact bridge of FIG. 1 with the contact pressure spring removed.
  • FIG. 3 is a plan view from below of the contact bridge of FIG. 1 showing th contact overlays which are soldered to the tray-like structure.
  • FIG. 4 is a front view of the contact bridge of FIG. 1 taken at the left-hand side.
  • FIG. 5 is a plan view of the bendable flat member from which the tray-like structure of the contact bridge is made. The right-hand side of the view shows how the member must be sheared if the contact bridge is to have balcony-like projections.
  • FIG. 6 is a schematic perspective view, partially in section, of an alternate embodiment of the invention wherein the burnoff pieces are mounted on the traylike structure in tongue and groove fashion.
  • the tray-shaped contact bridge shown in the drawing includes the tray bottom 1 and the tray Walls 2, 3, 4 and 5.
  • the contact overlays are soldered on at the outside of the tray bottom 1.
  • a bar 8 between the contact overlays 6 and 7 is situated and has protrusions 9 which engage with cutouts 10 of the tray bottom.
  • the bar is likewise soldered to the tray bottom.
  • the bar 8 determines the spacing of the contact overlays 6 and 7 during the self-acting alignment and also takes over part of the current flow between the two contact overlays 6 and 7.
  • a leaf spring II is inserted into the tray as shwon in FIG. 1.
  • Balconylike projections I2 can be situated outside the tray walls 4 and S at the end faces of the contact bridge as shown on the right-hand side of the contact bridge in FIG. 1.
  • the projections 12 serve on the one hand as the support surface for are burnoff pieces 13 and, on the other hand, as the sharp-edged support for the respective contact overlays 6 and 7 because if projections 12 are provided, they are also present here so that the contact overlays self-align on the edges of the projections 12.
  • the walls of the tray are formed by two side strips 14 extending in the longitudinal direction of the contact bridge. The strips 14 are sheared at the points 15 and are turned in at the end zone of the flat part toward each other.
  • the shear points are in the direction of the line between the side strip 14 and the central part 16.
  • the shearing operation permits putting the gaps of the tray walls on the center axis of the contact bridge.
  • the shear length is greater, if balcony-like projections 12 are provided, than in the other case, which is indicated on the left-hand side of FIGS. 1 to 5.
  • the location of the side strips 14 in the bent condition is shown in FIG. 5 by dashed lines. Because the contact overlays are soldered to the contact bridge, practically no additional effort is required to solder the ends 17 of the side strips 14 together so that no gap remains.
  • the contact overlays which extend beyond the edge (as exemplified by contact overlay 7), form the support for the arc burnoff pieces when no balcony-shaped projections 12 are provided. The burnoff pieces therefore can be soldered on in a simple manner.
  • FIG. 6 illustrated an alternate embodiment for mounting the burnoff pieces 18.
  • the burnoff pieces are each equipped with a slot-shaped recess 19 and can be pushed over the tray walls 4 and 5.
  • the burnoff pieces have a step which serves as support for the contact pressure spring 11.
  • a conact bridge comprising a tray-like structure having a bottom wall and a composite rim at the perimspective portions of said perimeter and configured to conjointly form said composite rim, each of said margin strips having respective end portions, the end portions of said margin strips at the respective longitudinal end regions of said central portion being bent towards each other to form respective end faces of said structure, respective arc burnoff pieces mounted at said end faces, and contact overlays mounted on respective portions of the outer side of said bottom wall of said tray-like structure.
  • the contact bridge of claim 1 comprising a contact pressure spring configured so as to force-lock hold said burnoff pieces in place.
  • each of said burnoff pieces having a groove for accommodating a corresponding one of said end faces therein.
  • each of said margin strips having respective end portions, the end portions of said margin strips at the respective longitudinal end regions of said central portion being bent toward each other to form respective end faces of said structure, said flat member being sheared determined dis tances along each of said lines so as to cause the longitudinal end regions of said central portion to extend out past said end faces to form balcony-like projections when said end portions are bent toward each other.
  • the contact bridge of claim 10 comprising respective arc burnoff pieces mounted on said projections so as to lie against corresponding ones of said end faces.
  • the contact bridge of claim 11 comprising a contact pressure spring configured so as to force-lock hold said burnoff pieces in place.
  • the contact bridge of claim 10 comprising respective burnoff pieces mounted at corresponding ones of said end faces, each of said burnoff pieces having a groove for accommodating a corresponding one of said end faces therein.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Stackable Containers (AREA)
  • Packaging Frangible Articles (AREA)
  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US00313997A 1971-12-11 1972-12-11 Contact bridge Expired - Lifetime US3818170A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2161616A DE2161616C2 (de) 1971-12-11 1971-12-11 Wannenförmige Kontaktbrücke

Publications (1)

Publication Number Publication Date
US3818170A true US3818170A (en) 1974-06-18

Family

ID=5827731

Family Applications (1)

Application Number Title Priority Date Filing Date
US00313997A Expired - Lifetime US3818170A (en) 1971-12-11 1972-12-11 Contact bridge

Country Status (11)

Country Link
US (1) US3818170A (de)
JP (1) JPS4886072A (de)
AT (1) AT316679B (de)
BR (1) BR7208625D0 (de)
CA (1) CA985726A (de)
DE (1) DE2161616C2 (de)
ES (1) ES409453A1 (de)
FR (1) FR2162642B1 (de)
GB (1) GB1408050A (de)
IT (1) IT971602B (de)
SE (1) SE390232B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056700A (en) * 1976-01-19 1977-11-01 Western Digital Corporation Keyboard assembly momentary contact push button switch with tactile action
US20040231820A1 (en) * 2003-05-19 2004-11-25 Takata Corporation Method and apparatus for manufacturing metallic parts by die casting
WO2012045339A1 (en) * 2010-10-06 2012-04-12 Siemens Aktiengesellschaft A plate and an electromagnetic contactor comprising the plate for reinforcing a movable contact of the electromagnetic contactor during switching operation.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2647888C3 (de) * 1976-10-22 1984-08-30 Siemens AG, 1000 Berlin und 8000 München Wannenförmige Kontaktbrücke
ATE21298T1 (de) * 1981-11-21 1986-08-15 Sprecher & Schuh Ag Kontaktstueck fuer ein elektrisches schaltgeraet, insbesondere fuer ein schuetz.
DE8500850U1 (de) * 1985-01-15 1985-04-25 Siemens AG, 1000 Berlin und 8000 München Kontaktbrücke

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1359866A (en) * 1920-11-23 Ihotoe
US2384988A (en) * 1942-07-31 1945-09-18 Westinghouse Electric Corp Double-break contact
US3597562A (en) * 1969-07-23 1971-08-03 Square D Co Movable contact structure for an electric switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1359866A (en) * 1920-11-23 Ihotoe
US2384988A (en) * 1942-07-31 1945-09-18 Westinghouse Electric Corp Double-break contact
US3597562A (en) * 1969-07-23 1971-08-03 Square D Co Movable contact structure for an electric switch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056700A (en) * 1976-01-19 1977-11-01 Western Digital Corporation Keyboard assembly momentary contact push button switch with tactile action
US20040231820A1 (en) * 2003-05-19 2004-11-25 Takata Corporation Method and apparatus for manufacturing metallic parts by die casting
WO2012045339A1 (en) * 2010-10-06 2012-04-12 Siemens Aktiengesellschaft A plate and an electromagnetic contactor comprising the plate for reinforcing a movable contact of the electromagnetic contactor during switching operation.
CN103155070A (zh) * 2010-10-06 2013-06-12 西门子公司 板和包括用于在切换操作过程中加强电磁接触器的活动触点的板的电磁接触器
CN103155070B (zh) * 2010-10-06 2016-01-20 西门子公司 板和包括用于在切换操作过程中加强电磁接触器的活动触点的板的电磁接触器

Also Published As

Publication number Publication date
FR2162642A1 (de) 1973-07-20
IT971602B (it) 1974-05-10
FR2162642B1 (de) 1983-08-12
GB1408050A (en) 1975-10-01
AT316679B (de) 1974-07-25
DE2161616A1 (de) 1973-05-30
DE2161616B1 (de) 1973-05-30
ES409453A1 (es) 1976-01-01
JPS4886072A (de) 1973-11-14
DE2161616C2 (de) 1973-12-20
BR7208625D0 (pt) 1973-09-13
CA985726A (en) 1976-03-16
SE390232B (sv) 1976-12-06

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