US3614360A - A multiple contact switching device for crossbar switches - Google Patents

A multiple contact switching device for crossbar switches Download PDF

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Publication number
US3614360A
US3614360A US875189A US3614360DA US3614360A US 3614360 A US3614360 A US 3614360A US 875189 A US875189 A US 875189A US 3614360D A US3614360D A US 3614360DA US 3614360 A US3614360 A US 3614360A
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US
United States
Prior art keywords
parallel
springs
slots
bars
contact
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
US875189A
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English (en)
Inventor
Harald Valdemar Alexandersson
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
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Publication of US3614360A publication Critical patent/US3614360A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H67/00—Electrically-operated selector switches
    • H01H67/22—Switches without multi-position wipers
    • H01H67/26—Co-ordinate-type selector switches not having relays at cross-points but involving mechanical movement, e.g. cross-bar switch, code-bar switch

Definitions

  • a contact unit for crossbar switches comprises a support body of insulating material of substantially parallelepipedic form carrying fixed contacts and movable contact springs for cooperation with the fixed contacts.
  • the fixed contacts consist of contact bars arranged in a plane parallel to the front and rear surface planes of the body.
  • the movable contact springs are arranged perpendicularly to the plane of the bars which; are fastened to the body at a portion of the same near the rear surface plane and project through slots in the front surface plane.
  • Lifting cards for the contact springs are provided at the movable ends of the springs outside the body.
  • the invention concerns a contact unit for crossbar switches and the like that comprises fixed contacts in form of parallel bars and movable contact springs for cooperation with these bars, located transversally thereto.
  • the movable contact springs are mounted in one assemblage and the fixed bars in another assemblage.
  • the two assemblages are mounted on a common base plate, so that the movable springs are brought into correct position for cooperation with the bars.
  • This construction requires numerous components and also requires great precision for correct functioning.
  • the invention refers to an improvement and simplification of the known device and is defined in the claims.
  • H6. 1 shows a cross section of the contact unit of one embodiment
  • FIG. 2 shows a partial front view of this same contact unit
  • FIG. 3 and 4 shows the corresponding views of second embodiment.
  • a plurality of movable contact springs 2 are fitted in a body 1 of insulating material, which body has a substantially rectangular cross section.
  • the contact springs are anchored to the body 1 at a portion adjacent to the rear surface plane 4 and project through slots 3 which are widened towards the front surface 6 of the body.
  • the contact springs have protruding soldering tags at the rear side of the body and in front of the body there is provided a lifting card 7 for each spring group, only one of said lifting cards being shown in FIG. 2.
  • Flxed contact wires 8 are arranged along the front side 6 of the body. They extend along the upper edge of the slots 3 and are in a convenient manner anchored to the body 1. When a lifting card is actuated, the movable contacts of the corresponding spring group are connected to the respective contact wires 8.
  • a body such as the onedescribed in this embodiment, may be manufactured in one piece with all vital dimensions defined by one-half of a casting tool, the tolerance requirements of the construction are easily satisfied.
  • the device requires a minimum of details, and a very compact construction is obtained.
  • the body I need not necessarily be made in a single solid piece; it can for example be designed in the way shown in FIGS. 3 and 4.
  • the body comprises a plurality of substantially equal plates 10, each one carrying a contact bar or wire 8, which plates are in convenient manner fastened to each other, so that they form an essentially compact body 1.
  • the bars 8 are here located in a plane set back from the front plane 6, while the bars in the first described embodiment are placed in a plane that practically coincides with the front surface 6.
  • a multiple contact switching device for crossbar switches comprising:
  • a rigid block made of insulation material and having two parallel surfaces, said block including a plurality of parallel spaced-apart slots extending between said parallel surfaces;
  • each of said springs disposed within one of said slots normal to said parallel surfaces, one end of each spring secured to the block at a point adjacent to one of said parallel surfaces and the other end of each spring protruding from the other parallel surface;

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  • Coupling Device And Connection With Printed Circuit (AREA)
  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US875189A 1968-12-03 1969-11-10 A multiple contact switching device for crossbar switches Expired - Lifetime US3614360A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1648468 1968-12-03

Publications (1)

Publication Number Publication Date
US3614360A true US3614360A (en) 1971-10-19

Family

ID=20302319

Family Applications (1)

Application Number Title Priority Date Filing Date
US875189A Expired - Lifetime US3614360A (en) 1968-12-03 1969-11-10 A multiple contact switching device for crossbar switches

Country Status (7)

Country Link
US (1) US3614360A (enrdf_load_stackoverflow)
BE (1) BE742503A (enrdf_load_stackoverflow)
DE (1) DE1959123B2 (enrdf_load_stackoverflow)
FR (1) FR2025120A1 (enrdf_load_stackoverflow)
GB (1) GB1290906A (enrdf_load_stackoverflow)
NL (1) NL6917855A (enrdf_load_stackoverflow)
NO (1) NO125868B (enrdf_load_stackoverflow)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577468A (en) * 1946-09-04 1951-12-04 Hartford Nat Bank & Trust Co Cross-bar switch for automatic telephony
US2587458A (en) * 1949-08-25 1952-02-26 Bell Telephone Labor Inc Contact spring
US2769880A (en) * 1954-07-09 1956-11-06 Ericsson Telefon Ab L M Contact device for cross bar switches
DE1120020B (de) * 1959-09-15 1961-12-21 Telefunken Patent Anordnung von Kontaktsaetzen
US3096422A (en) * 1959-02-10 1963-07-02 Ericsson Telefon Ab L M Multi-contact switching device
US3480744A (en) * 1966-10-31 1969-11-25 Victor Company Of Japan Key switch for electronic keyed instruments

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577468A (en) * 1946-09-04 1951-12-04 Hartford Nat Bank & Trust Co Cross-bar switch for automatic telephony
US2587458A (en) * 1949-08-25 1952-02-26 Bell Telephone Labor Inc Contact spring
US2769880A (en) * 1954-07-09 1956-11-06 Ericsson Telefon Ab L M Contact device for cross bar switches
US3096422A (en) * 1959-02-10 1963-07-02 Ericsson Telefon Ab L M Multi-contact switching device
DE1120020B (de) * 1959-09-15 1961-12-21 Telefunken Patent Anordnung von Kontaktsaetzen
US3480744A (en) * 1966-10-31 1969-11-25 Victor Company Of Japan Key switch for electronic keyed instruments

Also Published As

Publication number Publication date
GB1290906A (enrdf_load_stackoverflow) 1972-09-27
DE1959123A1 (de) 1970-06-04
FR2025120A1 (enrdf_load_stackoverflow) 1970-09-04
NL6917855A (enrdf_load_stackoverflow) 1970-06-05
DE1959123B2 (de) 1972-02-24
BE742503A (enrdf_load_stackoverflow) 1970-05-14
NO125868B (enrdf_load_stackoverflow) 1972-11-13

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