US3516064A - Switching grid matrix with crosspoint elements,controlled by marking pulses being very short compared to their responding period - Google Patents

Switching grid matrix with crosspoint elements,controlled by marking pulses being very short compared to their responding period Download PDF

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Publication number
US3516064A
US3516064A US572825A US3516064DA US3516064A US 3516064 A US3516064 A US 3516064A US 572825 A US572825 A US 572825A US 3516064D A US3516064D A US 3516064DA US 3516064 A US3516064 A US 3516064A
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United States
Prior art keywords
crosspoint
controlled
matrix
elements
switching
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Expired - Lifetime
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US572825A
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English (en)
Inventor
Wolfgang Grobe
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Alcatel Lucent NV
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International Standard Electric Corp
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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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0008—Selecting arrangements using relay selectors in the switching stages
    • H04Q3/0012—Selecting arrangements using relay selectors in the switching stages in which the relays are arranged in a matrix configuration

Definitions

  • a storage switch is provided for each row and for each column of a switching matrix.
  • the storage switches are controllable by relatively shorter pulses than are needed to operate crosspoint elements of the matrix.
  • Resistors are placed in parallel with the crosspoint elements to provide a current path over Which the storage switches can be kept operative until the crosspoint elements have had time to react and complete a circuit.
  • the invention relates to the marking of electro-mechanical crosspoint elements by means of electronic control devices.
  • crosspoint elements only need to be energized or marked a few microseconds, but the excitation current must be the higher, the shorter the excitation period shall last, but, if high current intensities are used, difficulties occur at mechanical contact making for selection of the rows and columns to be connected, of a matrix consisting of such crosspoint elements, if the contact-transfer resistance cannot safely be kept at its nominal value. This was hitherto possible only with contacts, coated with mercury.
  • a switching grid matrix is characterised by the fact that a storage switch is associated with each row and each column of the matrix, controlled by short pulses, and that the crosspoint elements are bridged by resistors through which upon marking of a crosspoint element, currents flow for keeping the storage switches in the conductive condition during the responding period of the crosspoint elements.
  • crosspoint elements may also be bridged by timing circuits, consisting of capacitance and ohmic resistance, or else by an element with a positive temperature coeflicient (PTC resistor).
  • timing circuits consisting of capacitance and ohmic resistance, or else by an element with a positive temperature coeflicient (PTC resistor).
  • a further embodiment of the invention provides that release contacts are provided, either for all rows and/or columns, or that only one release contact is provided for the entire switching grid.
  • bistable crosspoint elements are provided at the crosspoints, the switching condition of which can be reversed by changing the direction of current flow in the associated rowor column-coil.
  • a further embodiment of the invention provides that controlled rectifiers, four-layer diodes or coldcathode thyratrons are provided as storage switches, i.e. as switches for selecting the rows and columns there are used e.g. controlled rectifiers with a storage characteristic, corresponding to their current-voltage characteristic, assumed to be known per se.
  • FIG. 1 shows the inventive arrangement in a switching grid
  • FIG. 2 shows an arrangement for crosspoint elements having a bistable behavior.
  • the controlled rectifiers GX1, GX2 and GY1 for the rowand column-selection purpose are shown in FIG. 1. As disconnecting contacts axl, m2, etc. there are used metal contacts.
  • the cross point element K, inserted always between rows and columns, is bridged, according to the invention, by a resistor R.
  • the rectifier EG serves for mutual decoupling.
  • An auxiliary current therefore, flows through the resistor in such a Way that the controlled rectifier is kept in the conductive condition after the marking pulse is over, so that sufficient time is available before the field in the coil is established, i.e. until the crosspoint element is fully excited.
  • the connecting rectifier relay combination is provided with an adhesive character.
  • metal contacts may be used as switch-off contacts axl, ax2
  • FIG. 2 there is shown .a switching grid whose not shown bistable crosspoint elements are actuated electro-magnetically via row coils ZS and column coils SS.
  • the switch-over contacts 111 and a2 thereby serve to reverse the direction of current flow in the rowand column-coils.
  • the one direction of current flow serves to actuate the crosspoint elements, while the other direction of current flow serves to release the bistable crosspoint elements.
  • cold cathode tubes may be used as controlled storage switch means GXl and GY1 which, with their cathode-anode section A-K are looped into the column or row conductors and are controlled via the auxiliary anode HA.
  • the disconnection of the switching grid may be performed by the action of one single contact at I claim:
  • a switching matrix comprising a rectangular array of vertical and horizontal groups of multiples, a plurality of current controlled electronic switch means, one of said switch means being coupled to each of said multiples at the matrix inlet and at the matrix outlet, crosspoint means shunted by a resistance element at each intersection of said horizontal and vertical multiples, and means responsive to a switching pulse for firing the electronic switch associated with each of the desired inlet and outlet multiples, whereby current flows through said re- 4 sistance to hold saidfired switches in'an"on"condition while the crosspoint operates.
  • crosspoint means comprises a first winding associated with a horizontal multiple and a second Winding associated with a vertical multiple, and means for changing the switching condition of said crosspoints by reversing the direction of current flow.
  • each of said electronic switch means comprises a controlled rectifier.
  • each of said electronic switch means comprises a four layer diode.
  • each of said electronic switch means comprises a cold cathode tube.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Electronic Switches (AREA)
US572825A 1965-09-08 1966-08-16 Switching grid matrix with crosspoint elements,controlled by marking pulses being very short compared to their responding period Expired - Lifetime US3516064A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST24369A DE1244871B (de) 1965-09-08 1965-09-08 Koppelfeldmatrix mit Speicherschaltern in den Ansteuerleitungen der Koppelelemente

Publications (1)

Publication Number Publication Date
US3516064A true US3516064A (en) 1970-06-02

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ID=7460085

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Application Number Title Priority Date Filing Date
US572825A Expired - Lifetime US3516064A (en) 1965-09-08 1966-08-16 Switching grid matrix with crosspoint elements,controlled by marking pulses being very short compared to their responding period

Country Status (5)

Country Link
US (1) US3516064A (cs)
BE (1) BE686334A (cs)
CH (1) CH455883A (cs)
DE (1) DE1244871B (cs)
NL (1) NL6612561A (cs)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014202A (en) * 1956-11-29 1961-12-19 Zuse Kg Selector for selecting channels
US3079588A (en) * 1957-11-08 1963-02-26 Cie Ind Des Telephones Transistor switching devices in a gas tube coincidence matrix selector
US3348206A (en) * 1963-09-25 1967-10-17 Sperry Rand Corp Relay storage units
US3389228A (en) * 1965-03-31 1968-06-18 Sylvania Electric Prod Controlled latching semiconductor switch and switching network
US3435417A (en) * 1965-08-04 1969-03-25 Sylvania Electric Prod Electronic switching system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL256783A (cs) * 1959-10-14
US3113184A (en) * 1960-08-31 1963-12-03 Bell Telephone Labor Inc Telephone system
DE1227071B (de) * 1964-08-05 1966-10-20 Standard Elektrik Lorenz Ag Schaltungsanordnung zur Steuerung von Koordinatenmehrfachschaltern

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014202A (en) * 1956-11-29 1961-12-19 Zuse Kg Selector for selecting channels
US3079588A (en) * 1957-11-08 1963-02-26 Cie Ind Des Telephones Transistor switching devices in a gas tube coincidence matrix selector
US3348206A (en) * 1963-09-25 1967-10-17 Sperry Rand Corp Relay storage units
US3389228A (en) * 1965-03-31 1968-06-18 Sylvania Electric Prod Controlled latching semiconductor switch and switching network
US3435417A (en) * 1965-08-04 1969-03-25 Sylvania Electric Prod Electronic switching system

Also Published As

Publication number Publication date
NL6612561A (cs) 1967-03-09
BE686334A (cs) 1967-03-02
DE1244871B (de) 1967-07-20
CH455883A (de) 1968-05-15

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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