US3374397A - Indicator circuit with all electrodes connected to a common point through individual resistors - Google Patents

Indicator circuit with all electrodes connected to a common point through individual resistors Download PDF

Info

Publication number
US3374397A
US3374397A US544757A US54475766A US3374397A US 3374397 A US3374397 A US 3374397A US 544757 A US544757 A US 544757A US 54475766 A US54475766 A US 54475766A US 3374397 A US3374397 A US 3374397A
Authority
US
United States
Prior art keywords
anode
resistors
cathode
indicator circuit
electrodes
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 - Lifetime
Application number
US544757A
Other languages
English (en)
Inventor
Cornelis J Krayenbrink
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.)
INDOHEEM NV
Original Assignee
INDOHEEM NV
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 INDOHEEM NV filed Critical INDOHEEM NV
Priority to JP2609467A priority Critical patent/JPS4327678B1/ja
Application granted granted Critical
Publication of US3374397A publication Critical patent/US3374397A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/08—Output circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
    • G09G3/10—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using gas tubes
    • 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
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/007—Sequential discharge tubes

Definitions

  • the invention relates to an indicator circuit including a glow discharge tube having at least one anode and at least two cathodes, in which by connecting one anode and one cathode to the source of supply voltage, a glow discharge between the aforesaid anode and cathode can be effected selectively.
  • Such glow discharge tubes are often used as numeral indicators for electronic counters.
  • a first embodiment of such a tube comprises a single anode which is continuously connected to the appertaining supply voltage.
  • the tube also includes ten cathodes which, through separate switching devices, can be connected selectively to the appertaining supply voltage.
  • Each of the ten cathodes carries one of the numerals through 9 and during operation only the numeral which belongs to the cathode which at that time is connected to the supply voltage is illuminated.
  • the glow discharge tube comprises two anodes which, through switching devices, can be connected selectively with the appertaining supply voltage.
  • the tube further comprises five cathodes which,
  • switching devices can also be connected selectively to the appertaining supply voltage and which each carry two of the numerals from the series 0 through 9. Which of the .two numerals of the cathode connected to the supply voltage is illuminated, is determined by which of the two anodes is connected to the supply voltage.
  • An object of the invention is to provide a device in which the occurrence of such subsidiary discharges is prevented.
  • this might be obtained by connecting all electrodes through separate resistors to a point of such potential that no discharge can be set up at these electrodes unless the electrode concerned is connected to the appertaining supply voltage through the appropriate switching device.
  • such a potential could be the anode potential for the cathodes and could be the cathode potential for the anodes.
  • the electrode concerned would assume the full anode potential if it is a cathode or would assume the full cathode potential if it is an anode.
  • Another possibility would be to connect all electrodes through separate resistors to a tap on a voltage divider connected between the two supply voltages, at which tap a voltage prevails such that it cannot give rise to subsidiary discharges.
  • this would necessitate a separate voltage divider, the dissipation of which might be objectionable and which at any rate would call for additional components.
  • the invention provides an indicator circuit in which each of the anodes and cathodes are connected through individual resistors to a common star point which is not connected to anything else.
  • the resistors of the anode and cathode which are switched on at any time constitute a voltage divider, to the tap of which all further electrodes are connected through separate resistors.
  • the resistors can be chosen in such a way that all electrodes which are not switched on assume a potential which prevents the occurrence of subsidiary discharges. In this circuit, a separate voltage divider is not necessary.
  • the invention is further elucidated below with reference to the drawing, which shows a circuit diagram of an indicator circuit according to the invention.
  • the indicator tube 1 is provided with two anodes 2 and 3 and five cathodes 4 through 8.
  • Each cathode carries two of the numerals from the series 0 through 9. That anode which at any time is connected to the anode supply voltage determines which of the two numerals of a cathode which is connected to the cathode supply voltage, will be illuminated.
  • the anodes 2 and 3 are in the usual way connected to the anode supply terminal 12 through separate switching devices 9 and 10 and a common series resistor 11.
  • the cathodes 4 through 8 are in the usual way connected to the cathode supply voltage terminal 18 through separate switching devices 13-17. So far the circuit is entirely conventional.
  • Each of the electrodes 2 through 8 is connected to one terminal of one of the resistors 19 through 25 and the other terminals of these resistors are connected to each other. If, for example, the switching devices 9 and 16 are conducting, a glow discharge is established between the electrodes 2 and 7. In that condition, a voltage is set up at the tap of the voltage divider constituted by the resistors 19 and 24. The value of this voltage lies somewhere between the voltages appearing at the electrodes 2 and 7.
  • the electrodes 3 through 6 and 8, which are not switched on, are connected through the resistors 20 through 23 and 25 to this potential, so that subsidiary discharges cannot be established at these electrodes.
  • each of the cathodes is provided with a resistor corresponding to the resistors 21 through 25 of the drawing.
  • the junction of these resistors can be connected through a further resistor to the single anode or to the anode supply conductor.
  • the electrode resistors themselves constitute a voltage divider which keeps the potential of the electrodes which have not been switched on at a permissible value.
  • An indicator circuit comprising a glow discharge tube having at least one anode and at least two cathodes, means for selectively connecting one anode and one cathode to a source of supply voltage thereby to establish a glow discharge between the anode and cathode concerned, a plurality of separate resistors, and means connecting all UNITED STATES PATENTS 1/1966 Glaser et al. 315135 8/1967 Somlyody 31584.5 X

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
US544757A 1965-09-08 1966-04-25 Indicator circuit with all electrodes connected to a common point through individual resistors Expired - Lifetime US3374397A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2609467A JPS4327678B1 (xx) 1966-04-25 1967-04-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6511739A NL6511739A (xx) 1965-09-08 1965-09-08

Publications (1)

Publication Number Publication Date
US3374397A true US3374397A (en) 1968-03-19

Family

ID=19794087

Family Applications (1)

Application Number Title Priority Date Filing Date
US544757A Expired - Lifetime US3374397A (en) 1965-09-08 1966-04-25 Indicator circuit with all electrodes connected to a common point through individual resistors

Country Status (4)

Country Link
US (1) US3374397A (xx)
DE (1) DE1564158A1 (xx)
GB (1) GB1140370A (xx)
NL (2) NL6511739A (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5218273A (en) * 1991-01-25 1993-06-08 Motorola, Inc. Multi-function field emission device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3227922A (en) * 1964-11-25 1966-01-04 Burroughs Corp Electronic indicator circuit
US3335266A (en) * 1963-12-13 1967-08-08 Burroughs Corp Electronic counter using semiconductor counting devices

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335266A (en) * 1963-12-13 1967-08-08 Burroughs Corp Electronic counter using semiconductor counting devices
US3227922A (en) * 1964-11-25 1966-01-04 Burroughs Corp Electronic indicator circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5218273A (en) * 1991-01-25 1993-06-08 Motorola, Inc. Multi-function field emission device

Also Published As

Publication number Publication date
NL6511739A (xx) 1967-03-09
GB1140370A (en) 1969-01-15
DE1564158A1 (de) 1969-08-28
NL122908C (xx)

Similar Documents

Publication Publication Date Title
US2641696A (en) Binary numbers comparator
US3113241A (en) Electronic switch means for flashing electrical lamps
US2607891A (en) Translating circuits utilizing glow discharge devices
USRE22794E (en) G deakin
US3307171A (en) Apparatus for energizing an electrical load device
US3374397A (en) Indicator circuit with all electrodes connected to a common point through individual resistors
US2756934A (en) Electronic counter
US2765426A (en) Cold cathode gas tube counting chain
GB549440A (en) Selecting systems particularly for automatic telephones
US2962698A (en) Visual indicator system
US2988275A (en) Preset counter apparatus
US3135875A (en) Ring counter employing four-layer diodes and scaling resistors to effect counting
US3225215A (en) Bistable switching circuit employing opposite conductivity transistors
US3183404A (en) Control circuits for multicathode indicating devices
US3790850A (en) Apparatus for operating multiple position display tubes
US2857552A (en) Beam tube switching circuits
US2575371A (en) Cold cathode gaseous discharge device
US3553525A (en) Cathode heater arrangement for vacuum type display devices
US3142780A (en) Cold cathode gas tube counting circuits
US2679037A (en) Electric system for indicating the occurrence of a pair of signals
US2532718A (en) Coordinate selecting and lockout circuit
US3111659A (en) Translating apparatus as employed in automatic telephone and like systems
US2978645A (en) Electronic switching circuit
US2675504A (en) Gaseous discharge register
US3289038A (en) Naosuke tsubakimoto