GB756322A - Improvements in or relating to electric switching circuits - Google Patents

Improvements in or relating to electric switching circuits

Info

Publication number
GB756322A
GB756322A GB377552A GB377552A GB756322A GB 756322 A GB756322 A GB 756322A GB 377552 A GB377552 A GB 377552A GB 377552 A GB377552 A GB 377552A GB 756322 A GB756322 A GB 756322A
Authority
GB
United Kingdom
Prior art keywords
outlets
pulses
series
inlet
subscriber
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
Application number
GB377552A
Inventor
Frederick Harry Bray
Ronald George Knight
George Clifford Hartley
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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
Priority to BE519943D priority Critical patent/BE519943A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB377552A priority patent/GB756322A/en
Priority to US334192A priority patent/US2774820A/en
Priority to FR65032D priority patent/FR65032E/en
Priority to CH325317D priority patent/CH325317A/en
Priority to DEI6906A priority patent/DE969953C/en
Priority to CH336095D priority patent/CH336095A/en
Priority to FR67469D priority patent/FR67469E/en
Priority to FR68601D priority patent/FR68601E/en
Priority to GB12067/55A priority patent/GB756419A/en
Priority to FR69791D priority patent/FR69791E/en
Publication of GB756322A publication Critical patent/GB756322A/en
Priority to FR70824D priority patent/FR70824E/en
Priority to FR71357D priority patent/FR71357E/en
Priority to FR71959D priority patent/FR71959E/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H01J17/48—Cold-cathode tubes with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/52—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of gas-filled tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/007—Sequential discharge tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Lasers (AREA)

Abstract

756,322. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd. Jan. 9, 1953 [Feb. 13, 1952], No. 3775/52. Class 40 (4). In a selector switch for connecting an inlet to one of a number of outlets in which the inlet and the outlets can each be in any of three electrical conditions the inlet and an outlet are automatically connected when both are changed from the first to the second condition and when connected change to the third condition to prevent further connections occurring. The switches may be multi-cathode gas tubes controlled by recurring series of pulses. In a group of preselectors G1 . . . GX, Fig. 8, the anodes are connected to subscribers lines X and the corresponding cathodes are multipled to outlets Y. Individual series of negative pulses P1 . . . Py, Fig. 9, are continuously applied to the outlets and a series of positive pulses Q1 . . . Qx is allotted to each subscriber's line. When a subscriber's line, say 1, is waiting to be connected, the corresponding pulse series Q1 is applied, and when coincidence occurs between a pulse Q1 and one of the pulses, say P1, applied to the outlets Y the corresponding gap fires and a maintaining current circuit is completed between the potentials +V and earth over rectifiers W2, W1 The change in potential of the connected circuits prevents the firing of another gap of the tube G1 or of the gaps corresponding to the seized outlet in the tubes G2 . . . Gx. Specification 756,419 is referred to.
GB377552A 1951-04-06 1952-02-13 Improvements in or relating to electric switching circuits Expired GB756322A (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
BE519943D BE519943A (en) 1952-02-13
GB377552A GB756322A (en) 1952-02-13 1952-02-13 Improvements in or relating to electric switching circuits
US334192A US2774820A (en) 1952-02-13 1953-01-30 Electric discharge tube circuits
FR65032D FR65032E (en) 1951-04-06 1953-02-12 Automatic switching system usable in automatic telephony
CH325317D CH325317A (en) 1952-02-13 1953-02-13 Switching circuit
DEI6906A DE969953C (en) 1952-02-13 1953-02-13 Circuit arrangement for fully electronic telecommunications, especially telephone switching equipment
CH336095D CH336095A (en) 1952-02-13 1953-02-13 Switching device for automatic telecommunication central office
FR67469D FR67469E (en) 1951-04-06 1954-08-17 Automatic switching system usable in automatic telephony
FR68601D FR68601E (en) 1951-04-06 1955-01-07 Automatic switching system usable in automatic telephony
GB12067/55A GB756419A (en) 1952-02-13 1955-02-13 Improvements in or relating to electrical switching circuits
FR69791D FR69791E (en) 1951-04-06 1956-03-30 Automatic switching system usable in automatic telephony
FR70824D FR70824E (en) 1951-04-06 1956-09-28 Automatic switching system usable in automatic telephony
FR71357D FR71357E (en) 1951-04-06 1956-10-05 Automatic switching system usable in automatic telephony
FR71959D FR71959E (en) 1951-04-06 1957-02-08 Automatic switching system usable in automatic telephony

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB377552A GB756322A (en) 1952-02-13 1952-02-13 Improvements in or relating to electric switching circuits

Publications (1)

Publication Number Publication Date
GB756322A true GB756322A (en) 1956-09-05

Family

ID=9764685

Family Applications (1)

Application Number Title Priority Date Filing Date
GB377552A Expired GB756322A (en) 1951-04-06 1952-02-13 Improvements in or relating to electric switching circuits

Country Status (1)

Country Link
GB (1) GB756322A (en)

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