GB670578A - Improvements in or relating to circuit arrangements for electric discharge devices - Google Patents

Improvements in or relating to circuit arrangements for electric discharge devices

Info

Publication number
GB670578A
GB670578A GB34823/47A GB3482347A GB670578A GB 670578 A GB670578 A GB 670578A GB 34823/47 A GB34823/47 A GB 34823/47A GB 3482347 A GB3482347 A GB 3482347A GB 670578 A GB670578 A GB 670578A
Authority
GB
United Kingdom
Prior art keywords
arc
electrodes
resistances
resistance
contact
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
GB34823/47A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB670578A publication Critical patent/GB670578A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/14—Magnetic means for controlling the discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/02—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused
    • H01J31/06—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused with more than two output electrodes, e.g. for multiple switching or counting
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K29/00—Pulse counters comprising multi-stable elements, e.g. for ternary scale, for decimal scale; Analogous frequency dividers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

670,578. Electric selectors. TELEFONAKTIEBOLAGET L. M. ERICSSON. Dec. 30, 1947 [Jan. 3, 1947], No. 34823/47. Class 40 (iv). [Also in Group XL (a)] In an arc discharge tube, wherein pairs of auxiliary electrodes can be short-circuited by the magnetic deflection of the arc thereto, movement of the arc is arrested at a pair of centring electrodes by the regulation of the magnetic force on the arc through an electron discharge tube. As a preliminary to deflecting the arc on to one of the electrodes 31 corresponding to the selected number, the arc 13 is ignited by closure of a switch in the handset 44, whereby the coil 43 is energized to close relay R1. Contact 45 is thereby closed to strike the main arc, contact 35 is closed, whereby the centring electrodes 32 are connected to a potential through the winding 34 of relay R2, and contact 40 is connected to earth through resistance 46 whereby the arc deflecting field is increased by the continuous increase of the anode current in discharge tube 38 at a rate which is determined by the values of grid condenser 41 and resistance 46. The main arc is held at the position of electrodes 32 by the local discharge current which operates relay R2 to break contact 47 and prevent further increase of the potential of grid 38. The handset is provided with a number of resistances one of which can be selected by a push-button to impose a corresponding potential on the grid 38 whereby the arc will be deflected to the appropriate auxiliary electrode 31. In a modification, deflection of the arc is effected by variation of the arc current within a fixed or varying magnetic field. In another form the valve circuit shown may be replaced by a resistance bridge wherein the magnet coil 14 is connected across one diagonal and the operating voltage across the other; push-buttons in the handsets are adapted to insert in one arm of the bridge an appropriate resistance corresponding to the selected number. Different line resistances are compensated by supplementary resistances preferably inserted in the handsets; these resistances may be disconnected, e.g. by the telephone cradle after the selected circuit has been established. An automatic regulator may fix the line current at a predetermined value for an incoming call. Specification 666,123 is referred to.
GB34823/47A 1947-01-03 1947-12-30 Improvements in or relating to circuit arrangements for electric discharge devices Expired GB670578A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE269355X 1947-01-03

Publications (1)

Publication Number Publication Date
GB670578A true GB670578A (en) 1952-04-23

Family

ID=20306721

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34823/47A Expired GB670578A (en) 1947-01-03 1947-12-30 Improvements in or relating to circuit arrangements for electric discharge devices

Country Status (6)

Country Link
US (1) US2598392A (en)
CH (1) CH269355A (en)
DE (1) DE909705C (en)
FR (1) FR959203A (en)
GB (1) GB670578A (en)
NL (1) NL73706C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE511611A (en) * 1951-05-23
US2960575A (en) * 1952-04-10 1960-11-15 Int Standard Electric Corp Automatic telecommunication systems
US3337683A (en) * 1966-08-02 1967-08-22 Internat Scanning Devices Ltd Scanning device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2339684A (en) * 1944-01-18 Electronic control for telecommu
US2122102A (en) * 1935-03-02 1938-06-28 Lundell Torsten Adil Electric signaling system
US2204055A (en) * 1938-11-25 1940-06-11 Bell Telephone Labor Inc Telephone system

Also Published As

Publication number Publication date
CH269355A (en) 1950-06-30
DE909705C (en) 1954-04-22
NL73706C (en)
FR959203A (en) 1950-03-25
US2598392A (en) 1952-05-27

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