US3808565A - Miniaturized cross-point - Google Patents

Miniaturized cross-point Download PDF

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Publication number
US3808565A
US3808565A US00327887A US32788773A US3808565A US 3808565 A US3808565 A US 3808565A US 00327887 A US00327887 A US 00327887A US 32788773 A US32788773 A US 32788773A US 3808565 A US3808565 A US 3808565A
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United States
Prior art keywords
reeds
coil
coils
casing
miniaturized
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
US00327887A
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English (en)
Inventor
J Raso
E Jammes
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.)
Alcatel Lucent NV
Original Assignee
International Standard Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Assigned to ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS reassignment ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE
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Expired - Lifetime legal-status Critical Current

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    • 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
    • H01H67/24—Co-ordinate-type relay switches having an individual electromagnet at each cross-point

Definitions

  • each reed is surrounded by a coil, and is tailed in a base while its end carries the contact.
  • Two such reeds are respectively inserted in two coils or coil assemblies located side by side, to form a contact arrangement.
  • Each reed is made of two half-reeds forming a closed V, one branch of the V being made of resilient material and having its top end secured to the base, while the other branch is made of magnetic remanent material and carries the contact material located at its top end.
  • the present invention relates to miniaturized electromagnetic sealed relays and, more particularly, to those relays which are used as crosspoints in switching matrices.
  • Such crosspoints and such matrices are well known and are, for example, described in the article Un autocommutateur te'lphonique e'lectronique (An electronic telephone exchange) by A. .l. I-Ienquet, issued in the No. 208 of the review Me'canique et Electricite' of March 1967.
  • matrix crosspoint mounting is a complex operation if compared with mounting of other single components since coils and contacts are not associated before the matrix mount-
  • a miniaturized bistable electromagnetic relay which is sealed in a magnetic-shielded sealed casing to form, in particular, crosspoint for switching matrices such as those used in the telephone field.
  • that relay comprises two coil assemblies located side by side inside the sealed casing, each coil assembly comprising one or several coaxial coils.
  • FIG. 1 is a diagram of principle for defining the operation principle of a relay according to this invention
  • FIG. 2 is a diagram of principle of a relay according to this invention arranged to constitute a matrix crosspoint
  • FIGS. 3a and 3b are cross-sectional views of an em bodiment according to this invention.
  • the relay as shown in FIG. 1, comprises two contact reeds 1 and 2, made of resilient magnetic material and tailed in an insulating support 3 in such a manner that their contact ends 4 and 5 are only separated by a small space interval forming a magnetic gap.
  • Two empty coils 6 and 7 are respectively arranged, one around reed l and the other around reed 3, on the same side of support 3 as ends 4 and 5
  • Each central coil recess is so provided that the contact reed within it can move so as to contact the other reed.
  • contact ends 4 and 5 are magnetically attracted one toward the other and they establish an electric connection between reeds 1 and 2. If reeds l and 2 are made of remanent material, the contact remains established after having suppressed the supply current through the coils and it will only released by applying to the coils currents producing opposite inductions of sufficient values in reeds l and 2, so that the reeds move aside under combined actions of magnetic repulsion forces and of resilient forces.
  • contact reeds must have conflicting characteristics.
  • Magnetic attraction forces must be substantially higher than resilient forces to ensure a firm holding of contact closure after vanishing of control pulses. That needs the use of reeds having relatively important cross-section areas.
  • Resilient forces must be relatively small since, on the one hand, opening of contact formed by ends 4 and 5 is mainly due to magnetic repulsion effects and, on the other hand, such resilient forces are opposed to the magnetic attraction forces when contact is closing or closed. That needs the use of reeds having small crosssection areas with respect to the above mentioned cross-sectionarea.
  • reeds having two portions as shown in FIG. 2, such two-portion reeds being suitable for a cross-point controlled by current pulses and being'provided with magnetic latching.
  • the cross-point as shown in FIG. 2, may comprise m pairs of reeds, only one being shown.
  • each contact reed such as 1, comprises:
  • a smaJl-cross-section half-reed 10 made of nonmagnetic conducting material acting as a spring and which is tailed in insulating support 3 and passes longitudinally through coils 6 and 8,
  • half-reed 12 made of remanent magnetic material and provided with an end contact 4, and which is secured to half-reed 10 at the end opposite to 4 so as to ensure electric continuity through the whole reed 1.
  • Contact end 4 is located outside coils 6 and 8 whose holesare aligned and allow reed 1 to move for contacting end 5 of reed 2 with its end 4.
  • FIG. 2 permits to define the operation of cross-points, according to this invention, arranged in a rectangular matrix having n rows and p columns and coordinate controlled according to the method described, in particular, in the French Pat. No. 1,393,336 filed by the applicant.
  • the closure of the contact formed with reeds 1 and 2 is produced by simultaneously applying four pulses having selected current intensity and various durations on each of the four coils 6, 7, 8 and 9.
  • the first pulse X is applied to cross-point coil 6 and to all corresponding coils in the n other cross-points not shown of the same row X.
  • the second pulse Y having a same duration as X, is applied to the cross-point coil 7 and to all the corresponding coils in the p cross-points of the same column Y in the matrix.
  • the two other pulses X, and Y are'shorter and are simultaneously applied with the first ones, X to coil 8 and to all the corresponding coils in the n crosspoints of row X such as previously mentioned in relation with pulse X and Y, to coil 9 and to all the corresponding coils in the'fp cross-points of column Y as previously mentioned in relation with Y
  • reed l is subject to two flux which are equal and of opposite direction as produced by coils 6 and 8 while reed 2 is subject to two flux which also are equal and of opposite direction as produced by coils 8 and 9.
  • Pulses X and Y having been suppressed, contact is held closed due to series remanent magnetizations of half-reeds 12 and 13.
  • a cross-point is activated and if it belongs either to the same row or to the same column as the selected cross-point, say row X, it receives two pulses X and X: which produce flux of opposite directions in reeds l2 and 13 whose ends 4 and 5 are repelled by magnetic repulsion efiect pulse resilient effect of reeds l and 1 l, resilient forces relatively increasing when space interval between ends 4 and is increasing.
  • FIGS. 3a and 3b permit to define a cross-point of a miniaturized type made in tight casing forming a shield.
  • That cross-point comprises four coils 6, 7, 8 and 9 which are coaxial two by two and may be manufactured according to any means known to those skilled in the art. It comprises two pairs of contact reeds forming two separate contacts which are located side by side. Each group of coaxial coils, on the one hand, 6, 8 and, on the other hand, 7, 9 contains one reed of each contact in its central hole. The two reeds located in a same hole are each made of two half-reeds such as described in conjunction with FIG, 2.
  • coils 6 and 8 contain the two reeds comprising components 10a, 10b, 12a and 12b whichcan move inside their hole in such a manner that contact ends 4a and 4b can contact their corresponding contact ends 5a and 5b of reeds located in the hole of coils 7 and 9.
  • magnetic half-reeds such as 12a
  • end contact 40 is, for instance, made of a metal coating deposited on a nonremanent magnetic area of reed 12a which is itself remanent magnetic out of that area, the contact area 4a being made, in a known manner, by distorting half-reed 12a.
  • any other technique for manufacturing the contacts may be used for that purpose and, for example, the ultilization of added contacts as shown in FIG. 2.
  • FIGS. 3a and 312 also show a cap 14 made of nonremanent magnetic material, such as soft iron, which provides with the base 26,,on the one hand, a tight package and, on the other hand, a magnetic shielding.
  • nonremanent magnetic material such as soft iron
  • Packing is made, for example, under neutral atmosphere for avoiding any further oxidation of contacts.
  • the magnetic shield makes it possible to arrange the various cross-points closer in a matrix without being afraid of mutual interference inductions which usually limits matrix size reduction.
  • Coil terminals such as 17, 18, 19, 20, 20, 21, 22, 23 and contact reeds 15a, 16a and 15b, 16b are arranged in two lines parallel to the length of base26 so as to make easy insertion on printed circuit boards, such a mounting being known as dual in line arrangement.
  • Insulation of terminals from base 26 is provided, for
  • resilient half-reeds are made in non-magnetic material so as to avoid magnetic leakage toward the casing taking into account the closeness of those half-reeds and the casing in front of the terminals to which they are connected, such as 16aand 16b in front of half-reeds 10a and 10b.
  • Reversely, resilient half-reed end, which is secured to I the magnetic half-reed, is located close to the adjacent casing wall so as to reduce the so produced magnetic gap reluctance up to a value determined by electric insulation needed between the considered conducting reed and the casing.
  • a miniaturized sealed bistable electromechanical crosspoint relay for use in switching matrices comprising:
  • each of said first and second coil assemblies containing a plurality of co-axial electromagnetic hollow core coils; and 10 c. a plurality of reeds inserted within the cores of said electromagnetic coils with one of said reeds corresponding to each said coil, each of said reeds including a pair of first and second laterally adjacent first arm including a resilient non-magnetic consaid base at least one said terminal connected to one said corresponding coil, and at least one said terminal connected to one said corresponding reed, said terminals being parallely arranged on said base to form a dual in-line pattern.
  • each said coil assembly comprises two coaxial conducting material with an electric contact area hollow core coils. at one end, whereby said reeds of said first coil as-

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electromagnets (AREA)
US00327887A 1972-01-31 1973-01-30 Miniaturized cross-point Expired - Lifetime US3808565A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7203105A FR2169735B1 (de) 1972-01-31 1972-01-31

Publications (1)

Publication Number Publication Date
US3808565A true US3808565A (en) 1974-04-30

Family

ID=9092701

Family Applications (1)

Application Number Title Priority Date Filing Date
US00327887A Expired - Lifetime US3808565A (en) 1972-01-31 1973-01-30 Miniaturized cross-point

Country Status (6)

Country Link
US (1) US3808565A (de)
CH (1) CH569361A5 (de)
DE (1) DE2303854A1 (de)
ES (1) ES411124A1 (de)
FR (1) FR2169735B1 (de)
GB (1) GB1364032A (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500267A (en) * 1968-05-28 1970-03-10 Bell Telephone Labor Inc Ferreed switch having printed circuit board wiring
US3510812A (en) * 1967-04-27 1970-05-05 Nippon Telegraph & Telephone Polarized reed relay
US3587011A (en) * 1970-01-09 1971-06-22 Pyrofilm Corp Reed switch and relay

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3510812A (en) * 1967-04-27 1970-05-05 Nippon Telegraph & Telephone Polarized reed relay
US3500267A (en) * 1968-05-28 1970-03-10 Bell Telephone Labor Inc Ferreed switch having printed circuit board wiring
US3587011A (en) * 1970-01-09 1971-06-22 Pyrofilm Corp Reed switch and relay

Also Published As

Publication number Publication date
CH569361A5 (de) 1975-11-14
FR2169735A1 (de) 1973-09-14
DE2303854A1 (de) 1973-08-09
ES411124A1 (es) 1976-04-01
FR2169735B1 (de) 1978-03-03
GB1364032A (en) 1974-08-21

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Legal Events

Date Code Title Description
AS Assignment

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

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

Effective date: 19870311