US2182152A - Electric signaling system - Google Patents

Electric signaling system Download PDF

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Publication number
US2182152A
US2182152A US121704A US12170437A US2182152A US 2182152 A US2182152 A US 2182152A US 121704 A US121704 A US 121704A US 12170437 A US12170437 A US 12170437A US 2182152 A US2182152 A US 2182152A
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United States
Prior art keywords
electrodes
sets
conductors
discharge
resistances
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Expired - Lifetime
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US121704A
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English (en)
Inventor
Hullegard Erik Waldemar
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/525—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using tubes in the switching stages

Definitions

  • This invention relates to an electrical signaling system more particularly of the kind in which a sender may be automatically put into electrical connection with a certain one of a plurality of receivers or a receiver into connection with a certain one of a plurality of senders and has for its object improved arrangements for establishing and maintaining the connection.
  • An object of the present invention is to provide an arrangement by which the electron or discharge paths are controlled from the sender directly without the aid of deflcctable rays for the establishment and maintenance of the connection and to this end each sender or receiver respectively is arranged to be connected to one of a plurality of receivers or senders respectively over one of a plurality of discharge paths which are arranged between an electrode connected to a sender or a receiver respectively and a plurality of electrodes connected to different receivers or senders respectively and which have different ignition tensions and are connected in series with resistances of such magnitude that by discharge between two electrodes the tensions of the discharge paths between the electrodes and the other electrodes are below the corresponding ignition tensions.
  • the electrodes are asumed to be enclosed. in a vessel. for instance a glass bulb, with a suitable gas filling.
  • the electrodes or 15 set consist of parallel bars which are arranged in three layers or subsets SN', SN" and SN".
  • the electrodes or set consist of metal wires arranged in layers or subsets AB', AB, AB"' and AB"" between and outside the bars. in the subset AB' and each bar in the subset SN' are assumed to be arranged in multiple with corresponding wires and bars in other electrode systems.
  • FIG. 1 When the arrangement is used as a call finder 25 in a telephone. exchange ithe bars shown in Figure 1 are connected to cord circuits and the wires to subscriber lines. Each of the cord circuits is connected over a resistance 'W1 and W2 to a common source of current H.
  • Figurell 36 illustrates schematically an unilar connectionof such a type. The cord circuit connected to the lowermost bar SN' is connected over the resistance W1 to the battery I-I in series connection,
  • the wire IAB disposed farthest to the right 35 is connected with a subscriber set or sender S over a resistance Ws and a condenser C in parallel connection.
  • the subscriber set is in turn connected to ground.
  • other subscribers are connected to the other wires ZAB', 40
  • connection is shown as a single wire connection with the earth as a return conductor.
  • the subscriber set is connected symmetrically so that the conductor shown in Figure l as being connected to earth is connected with a corresponding wire in another wire assembly over a resistance and a condenser in parallel connec- 50 tion, and the corresponding bar in the wire assembly is connected to the battery H over a resistance.
  • the resistance Wa 55 Each wire 20 In the practical application 45 and the wire IAB' and one of the bars SN' the corresponding resistance W1, W2, the common battery H and through earth. The discharge takes place between the wire IAB' and the one of the bars which forms a discharge path in relation to the wire IAB' with the lowest ignition tension. By sloping the planes of the wires in relation to the planes of the bars the distances and hereby also the ignition tensions will be different between dierent wires and bars. When a discharge is produced between the wire and the bar in the subscriber circuit shown the resistances Wa and W1 produce a voltage drop.
  • the resistances are so dimensioned that the tension across any discharge paths between any one of the two engaged electrodes and the remaining electrodes in the tube will be lower than the corresponding ignition tensions whereby it is prevented that another subscriber connected to one of the other wires can be connected to the engaged bar through such a discharge.
  • the bar ISN and consequently also the cord circuit connected thereto is therefore marked as engaged.
  • a second calling subscriber who is connected with the wire 2AB causes a ydischarge between the wire EAB' and the one of the unengaged bars which forms a discharge path in relation to 2AB with the lowest ignition tension.
  • This unengaged bar is assumed to be ZSN'.
  • a discharge between ZAB and ESN' cannot take place as the potential of ISN' in consequence of the voltage drop in the resistance W1 is too low.
  • the potential of ISN increases to the potential of the battery H.
  • a discharge between iSN' and an engaged wire, in this case ZAB cannot be ignited as the voltage is too low.
  • the ionization between two certain electrodes will not spread to other bars and wires when the distances between the electrodes are suiiiciently wide. Screens of insulating materials also have proved to prevent ionization from spreading. Since the speaking currents flow from S to the cord circuit the resistance Wa is shunted with the condenser C.
  • the resistances W1, W2, etc. need not be shunted in corresponding manner because the speaking currents do not pass through the same but continue to the right as indicated on the drawing to a called subscriber through suitable switching members.
  • Figures 3 and 4 show a modified electrode ar ⁇ rangement wherein the bars SN are ring-shaped and arranged concentrically in groups, the individual groups being arranged one abovelthe other.
  • the wires AB extend between and outside the dierent rings.
  • both kinds of electrodes are in principle equivalent so that they can change duty.
  • a communicating system in combination a number of conductors arranged in two sets, a discharge tube, a plurality of electrodes in said tube, said electrodes being connected each to one of said conductors, discharge paths constituting talking paths between each electrode connected to one of said sets of conductors and electrodes connected to the other of said sets of conductors, said discharge paths having different ignition tensions, a iirst group of resistances ⁇ each of which is connected to each of the conductors in one of said sets of conductors, subscriber sets each of which are connected in series with each of said resistances, a second group of resistances each of which is connected with one terminal to one of the conductors in the other set oi conductors and with the other terminal to one terminalof a common source of current and connections between the other terminal of said common source of current and said subscriber sets, the resistances of both of said groups having such magnitudes that by constituting a talking path over a discharge between an electrode in one of said sets of electrodes and an electrode in another of said sets,
  • a communicating system in combination a number of conductors arranged in two sets, a discharge tube, two sets of electrodes in said tube corresponding to said two sets of conductors, said electrodes being connected each to one of said conductors, one of said sets of electrodes consisting of substantially straight parallel wires or bars lying substantially in the same plane and the other of said sets of electrodes being arranged perpendicularly to the -rst mentioned electrode, discharge paths constituting talking paths between each electrode connected to one of said sets of conductors and electrodes connected to the other of said sets of conductors, said discharge paths having different ignition tensions, a rst group of resistances each of which is connected tol each of the conductors in one of said sets of conductors, subscriber sets each of which is connected in series with each of said resistances, a second group of resistances each of which is connected with one terminal to one of the conductors in the other set of conductors and with the other terminal to one terminal of a common source of current, and connections between the other terminal of
  • a communicating system characterized in that the planes of the electrodes connected to one set of conductors occupy a somewhat sloping position in relation to the planes of the electrodes connected to the other set of conductors.
  • a communicating system in combination a number of conductors arranged in two sets, a discharge tube, two sets of electrodes in said tube corresponding to said two sets of conductors, one of said sets of electrodes consisting of separate annular Wires or bars arranged concentrically in parallel planes'and the other of said sets of electrodes consisting of wires or bars positioned in one or more cylindrical surfaces parallel with the axis of the annular concentric wires, said electrodes being connected each to one of said conductors, discharge paths between each electrode connected to one of said sets of conductors and electrodes connected to the other of said sets of conductors, said discharge paths having different ignition tensions, a iirst group of resistances each of which is connected to each of the conductors in one of said sets of conductors, signalling devices each of which is connected in series with each of said resistances, a second group of resistances each of which is connected with one terminal to one of the conductors in the other set of conductors and with the other terminal to one terminal of

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
US121704A 1936-02-17 1937-01-21 Electric signaling system Expired - Lifetime US2182152A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE471194X 1936-02-17

Publications (1)

Publication Number Publication Date
US2182152A true US2182152A (en) 1939-12-05

Family

ID=20310328

Family Applications (1)

Application Number Title Priority Date Filing Date
US121704A Expired - Lifetime US2182152A (en) 1936-02-17 1937-01-21 Electric signaling system

Country Status (4)

Country Link
US (1) US2182152A (en, 2012)
DE (1) DE689398C (en, 2012)
GB (1) GB471194A (en, 2012)
NL (1) NL51557C (en, 2012)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494670A (en) * 1946-04-26 1950-01-17 Rca Corp Electronic discharge device
US2519172A (en) * 1946-08-30 1950-08-15 Rca Corp Control of electron discharge device of area selection type
US2685611A (en) * 1950-12-15 1954-08-03 Ferranti Ltd Positional data transmitting system
US2749480A (en) * 1952-11-24 1956-06-05 Ruderfer Martin Apparatus for producing threedimensional visual patterns
US2890376A (en) * 1954-07-20 1959-06-09 Philips Corp Image producing discharge device
US2895079A (en) * 1955-08-15 1959-07-14 Ibm Image transmission system
US3156898A (en) * 1961-12-26 1964-11-10 Bell Telephone Labor Inc Translator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE519943A (en, 2012) * 1952-02-13

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494670A (en) * 1946-04-26 1950-01-17 Rca Corp Electronic discharge device
US2519172A (en) * 1946-08-30 1950-08-15 Rca Corp Control of electron discharge device of area selection type
US2685611A (en) * 1950-12-15 1954-08-03 Ferranti Ltd Positional data transmitting system
US2749480A (en) * 1952-11-24 1956-06-05 Ruderfer Martin Apparatus for producing threedimensional visual patterns
US2890376A (en) * 1954-07-20 1959-06-09 Philips Corp Image producing discharge device
US2895079A (en) * 1955-08-15 1959-07-14 Ibm Image transmission system
US3156898A (en) * 1961-12-26 1964-11-10 Bell Telephone Labor Inc Translator

Also Published As

Publication number Publication date
NL51557C (en, 2012)
GB471194A (en) 1937-08-30
DE689398C (de) 1940-03-19

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