US3065306A - Electronic marking device - Google Patents

Electronic marking device Download PDF

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Publication number
US3065306A
US3065306A US749522A US74952258A US3065306A US 3065306 A US3065306 A US 3065306A US 749522 A US749522 A US 749522A US 74952258 A US74952258 A US 74952258A US 3065306 A US3065306 A US 3065306A
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United States
Prior art keywords
relay
transistor
resistance
point
magnetostatic
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Expired - Lifetime
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US749522A
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English (en)
Inventor
Burstow Pierre
Monin Claude
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.)
Compagnie Industrielle des Telephones SA
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Compagnie Industrielle des Telephones SA
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Definitions

  • the marking does not take place digit-by-digit, but directly at the called subscriber in accordance with the digits dialled by the calling subscriber and received in a device called a register, the selection thereafter taking place.
  • the principle may be as follows: all the lines, for example 100, are assembled in the form of a matrix, each horizontal row corresponding to a ten and each vertical column to a unit. Thus, the coordinates of any line taken in the matrix correspond to a certain ten and a certain unit. This line may be determined as soon as its number has been received by a register.
  • the object of the invention is to provide an electronic marker in which no conventional electromechanical member having movable contacts is employed, but which employs only static members, more especially magnetostatic relays as defined by applicants in the French Patent 1,160,506, for which the application was filed on November 9, 1956, for Magnetostatic Relay, the corresponding United States application having matured as Patent 2,946,896.
  • some or all of the subscribers are disposed on a matrix comprising horizontal conductors and vertical conductors, there being associated with each horizontal conductor, for example, a tens relay and with each vertical conductor a units relay.
  • each horizontal conductor for example, a tens relay and with each vertical conductor a units relay.
  • these means consist in the association of two transistors with a magnetostatic relay.
  • the latter is operated only if the special conditions of a strong marking current are fulfilled.
  • the first transistor is rendered non-conductive by the operation of the magnetostatic relay and the second transistor is rendered conductive. If a resistance is connected between the emitter and the collector of the said second transistor, this resistance is substantially shortcircuited when the second transistor is conductive and the marking current increases considerably.
  • FIGURE 3 illustrates diagrammatically a special de vice according to the invention, by which the marking current can be increased in some cases.
  • the matrix is composed of ten horizontal conductors D ,D B D and of ten vertical conductors U ,U U ,U forming crossing points.
  • a connection point is formed by connection of the point A21 of the horizontal conductor to the point B21 of the vertical conductor through a rectifier R and a winding e21 of the ringing relay whose line number corresponds to the number of the connecting point.
  • a horizontal bar D can be brought to a certain polarity through a switching device such as H and a vertical bar can be brought to the opposite polarity through a switching device V and a resistance R
  • the connecting point is established when a current flows between H and V through the connection A B
  • the switching devices E l-I H ,H are associated each with one of the intermediate tens relays of the register and the switching devices V ,V V ,V are associated each with one of the intermediate units relays.
  • the intermediate ten and units relays of this called subscriber pull up and a connection, such as that of H V through A B is consequently established.
  • a resistance rD Connected to the collector of the transistor TD is a resistance rD the other end M2 of which is connected on the one hand to the point A and on the other hand to a voltage source U through a resistance RD the value of which is high in relation to the value of the resistance rD
  • a resistance rD There are connected to each vertical conductor U of the matrix, at the point N on the one hand a voltage source U through a resistance rU and on the other hand a transistor TMU through its collector, the emitter of the latter transistor being connected to ground, and the base being connected through a resistance rMU to the output conductor at Q of a magnetostatic relay for registering a second digit
  • the said relay comprising a second transistor TU the collector of which is connected to the point Q and therefrom through resistor rMU to the base of the transistor TMU and the emitter of which is connected to the intermediate units relay Un through a rectifier, the emitter of the transistor TU being connected to a voltage source U through
  • an intermediate tens relay such as Dz is directly connected to the corresponding tens bar, while the intermediate units relay U11 is connected to the point N only through the transistor TMU
  • the transistors such as TMU have the point Q of their base at a negative potential, because the resistance r U is at the potential U,,. Since the emitter is grounded, it is positive in relation to the base, and the collector reproduces substantially at the point N the potential of the emitter, that is to say, ground.
  • each of the magnetostatic relays connected to a respective horizontal conducting bar is provided with an output circuit means including the resistance rD and resistance RD leading to the connecting link in which the subscribed relay e is located.
  • the output circuits of each of the ma gnetostatic relays associated with the respective vertical conducting bars include output means comprising the blocking transistor TMU and the aforementioned resistances in the collector and base circuits thereof.
  • FIGURE 3 shows exactly the same matrix device as has already been described with reference to FIGURES 1 and 2, the illustrated part of which is confined to a single ten Dz and to a single unit Un, but to which there is connected between the points T and M a device consisting of a transistor TMD associated with each ten, and of two transistors TMA and TMB sharing a common point P, which are the only ones provided in the matrix, the point P common to the collector of TMB and to the base of TMD being multiplied at the homologous points of the bases of the transistors such as TMD corresponding to each other ten conductor.
  • the transistor TMA associated with the magnetic core AM, with the rectifier Re, with the resistances rM and RMA and with the negative voltages U Ur and U is defined under the name Magneto-Static Relay in the aforesaid US. Patent 2,946,896. It has been seen that the same was the case with the magnetostatic tens and units relays Dz and U12 respectively.
  • This device operates as follows: In the case of a communication between a calling subscriber and a called subscriber, both of which are connected to the same automatic switch, it is merely necessary to mark the called subscriber, that is to say, to cause his ringing relay to pull up.
  • the relay AM is set into operation only if the normal marking current is insuflicient to bring to the operative position a ringing relay which is already polarised in a certain sense. If the relay AM is not energised, the collector of the transistor TMA is nonconductive and consequently the point K is at a negative potential of U through the resistance RMA. The transistor TMB conducts and the point P assumes a positive potential.
  • the transistor TMD is non-conductive and consequently the tens relay Dz conducts or discharges through the resistance ID, as has been seen in FIGURE 2.
  • the relay AM is energised, the point K is at a positive potential and the transistor TMB is non-conductive.
  • the point P assumes a negative potential and the transistor TMD changes into the operative position.
  • the points T and M are then substantially at the same potential and the resistance rD is short-circuited by the transistor TMD.
  • the normal energising circuit of the winding e of the ringing relay which was closed through the resistances rD and rU in series, then only has the single resistance rU. The current flowing through the winding e therefore increases considerably.
  • the current is substantially doubled. It is therefore capable of bringing a ringing relay into the operative position even if the latter is previously polarised in the opposite sense, which may be the case in systems for direct connection to the network or in certain automatic switches, in which absolute priority is given to a number of lines for which the communication must always be established regardless of the state of the called subscriber.
  • Transistors of p-n-p-type have been illustrated in the drawings; it is obvious that a similar arrangement would be possible with transistors of n-p-n-type, with which it would be sufficient to adapt the sense of the polarities appropriately.
  • An electronic marking device for marking a relay of a subscriber to be called in a telecommunication system, comprising a marking matrix including a plurality of interconnected horizontal bars and vertical bars, means including an intermediate link for connecting each horizontal bar to each vertical bar at each respective connecting point, said intermediate link comprising a rectifier in series with a winding of a respective subscriber relay at the respective connecting point, a magnetostatic registering relay means including an output means connected to each horizontal bar respectively and a second magnetostatic registering relay means including an output means connected to each vertical bar of the matrix, respectively, the output means of each said second magnetostatic relay including a blocking transistor connected between the re spective second magnetostatic relay and the corresponding vertical bar, means for blocking said blocking transistor when the corresponding second magnetostatic relay is inactive and for unblocking said transistor when the magnetostatic relay is energized, each horizontal bar having means including the output means of the respective first-mentioned magnetostatic relay for applying a potential thereto corresponding to the energized condition of the relay, each vertical
  • a marking device wherein a first resistance is disposed between a relay and a common point on the corresponding horizontal bar, the common point being also connected, on the one hand, to one end of a second resistance whose value is high in relation to the first resistance and, on the other, to the respective connecting link, and the direction of the rectifier being such that it is not conductive when said common point has the same polarity as the point to which the other end of the second resistance is connected.
  • a marking device wherein said blocking transistor is connected between at least one of said vertical bars and the respective relay, said blocking transistor having a collector connected to the common point of the respective vertical bar, the common point between the vertical bar and the collector of the blocking transistor connected to the second magnetostatic relay being also connected to one end of a third resistance of equivalent value to said first resistance disposed at the common point of the horizontal bar, and means for energizing one end of said third resistance at the same potential as said other end of the second resistance.
  • a marking device wherein said further magnetostatic relay for the marking matrix is connected by the collector of its transistor to the base of one of said two transistors, the latter transistor having its emitter earthed and its collector connected to the base of the other of said two transistors which is individually associated with a bar, the common points between the base and the collector being each connected to a negative polarity through a resistance, so that, when the magnetostatic relay of the marker is rendered operative, the transistor associated therewith is rendered non-conductive, the latter transistor then permitting the transistor associated with the input resistance of a bar to be rendered operative.
  • An electronic marking device wherein said subscriber relay is identified by a plurality of 4 digits and wherein the magnetostatic registering relay means connected to each horizontal bar of the matrix is operatively connected for registering a first digit for identifying the subscriber relay and the magnetostatic relay means connected to the vertical bar of the matrix is op- 5 eratively connected for registering a second digit for identifying said subscriber relay.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
US749522A 1957-08-05 1958-07-18 Electronic marking device Expired - Lifetime US3065306A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1180795T 1957-08-05

Publications (1)

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US3065306A true US3065306A (en) 1962-11-20

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US (1) US3065306A (en)van)
CH (1) CH348987A (en)van)
FR (1) FR1180795A (en)van)
NL (2) NL103627C (en)van)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291915A (en) * 1960-03-23 1966-12-13 Itt Electronic switching control circuit for telecommunication system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787666A (en) * 1954-07-07 1957-04-02 Siemens Brothers & Co Ltd Automatic selecting systems
US2857470A (en) * 1956-05-02 1958-10-21 Gen Telephone Lab Inc Transistor line identifier
US2862060A (en) * 1950-06-02 1958-11-25 Int Standard Electric Corp Electrical connecting circuits

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862060A (en) * 1950-06-02 1958-11-25 Int Standard Electric Corp Electrical connecting circuits
US2787666A (en) * 1954-07-07 1957-04-02 Siemens Brothers & Co Ltd Automatic selecting systems
US2857470A (en) * 1956-05-02 1958-10-21 Gen Telephone Lab Inc Transistor line identifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291915A (en) * 1960-03-23 1966-12-13 Itt Electronic switching control circuit for telecommunication system

Also Published As

Publication number Publication date
NL103627C (en)van)
FR1180795A (fr) 1959-06-09
CH348987A (fr) 1960-09-30
NL230082A (en)van)

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