US2617074A - Multianode cathode-ray tube circuit having a rapid flyback action - Google Patents

Multianode cathode-ray tube circuit having a rapid flyback action Download PDF

Info

Publication number
US2617074A
US2617074A US202346A US20234650A US2617074A US 2617074 A US2617074 A US 2617074A US 202346 A US202346 A US 202346A US 20234650 A US20234650 A US 20234650A US 2617074 A US2617074 A US 2617074A
Authority
US
United States
Prior art keywords
electrode
deflection
cathode
voltage
collecting
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
US202346A
Other languages
English (en)
Inventor
Beurs Pieter Hendrik De
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2617074A publication Critical patent/US2617074A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/04—Distributors combined with modulators or demodulators
    • H04J3/045—Distributors with CRT

Definitions

  • This invention relates to a circuit-arrangement comprising a cathode-ray tube provided with means for producing and deflecting an electron beam and in which a collecting electrodesystem is coupled to the deflection means for the beam so that the beam may occupy a number of naturally stable positions, means being provided for shifting the beam from one stable position to another.
  • the cathode-ray tube comprises collecting electrodes which are arranged side by side in the direction of deflection and connected to taps on a potentiometer, an additional tap being coupled to a deflection electrode of the tube, and the taps being so chosen that if the beam strikes one of the collecting electrodes the deflection voltage produced is just suflicient to direct the beam to the electrode in question.
  • the beam is kept in difierent stable positions, since in each of these positions the beam current is divided over a first collecting electrode and one or more further collecting electrodes, the first collecting electrode being on the one hand connected directly to a deflection electrode and on the other hand to a voltage source through a resistor.
  • the first collecting electrode being on the one hand connected directly to a deflection electrode and on the other hand to a voltage source through a resistor.
  • different deflection voltages correspond to different stable positions of the beam.
  • the beam can be shifted from. one stable position to another by supplying an impulse to the deflection system.
  • Such circuit-arrangements are particularly suitable for counting purposes, for example in calculating apparatus, since the position of the beam is an indication of the number of pulses supplied to the circuit-arrangement.
  • a known circuit-arrangement comprises an auxiliary collecting electrode which is provided laterally from the main collecting system in the tube. This auxiliary electrode is struck by the beam in an extreme position and an impulse is produced within this electrode. This impulse is supplied to the deflection system or to an intensity-control electrode of the tube and effects the flyback of the beam. Upon every flyback an impulse is furthermore supplied to a circuit arrangement registering the tens,'for example.
  • the present invention provides a circuit-arrangement which permits this aim to be achieved by simple means and without using auxiliary tubes.
  • a circuit-arrangement comprising a cathode ray tube provided with means for producing an electron beam and means for deflecting the beam in a particular direction and in which a collecting electrode system is coupled to the deflection means so that the beam may occupy a number of naturally stable positions, means being provided for shifting the beam from one stable position to another, a secondary-emission collecting electrode being arranged in the tube in such manner that it is struck by the beam in an extreme position of the beam, which collecting electrode is coupled to a voltage source through at least one resistor and means being provided which respond when the secondary-emission collecting electrode is struck by the beam to return the beam from the extreme position to an initial position, is char acterized in that a further collecting electrode "is provided in the proximity of the secondaryemission collecting electrode, this further collecting electrode being coupled capacitatively to a deflection electrode and coupled by way of at least one resistor to a voltage source such that if the secondary-emission collecting electrode is not struck by the beam, the potential of the further-collecting electrode
  • the secondary-emission collecting electrode may furthermore be coupled capacitatively to an intensity control electrode of the tube, the intensity control electrode being coupled to a voltage source through at least one resistor.
  • Fig. 1 shows one embodiment of the circuitarrangement according to the invention.
  • Fig. 2 is a current-voltage diagram with reference to which the operation of the circuitarrangement will be explained.
  • the cathode-ray tube l shown in *Fig.1# comprises a cathode 2, a control grid 3, means 4 for producing an electron beam remthe electrons emitted by the cathode 2, deflection -pla tes 5 6 and collecting electrodes 1, 8, l2 and 13.
  • the means 4 are coupled, in a manner-not--'shown,'to suitable taps On a supply battery 11.
  • the "electrode 1 is arranged in front of, i. e. on the cathode side of the electrode 8 and provided with apertures I so that the beam, upon deflection, alternately strikes an element bf -the 1ee'trede I and, through the apertures I provided inthe electrode 1, the electrode 8.
  • the current flowing to the electrode '8, as adu'n'ction of'ftlie deflection voltage set up at thedeflettien enetreae 6 then has the form of the curve 2
  • the beam is intercepted by the electrode 1, the
  • the electrode 8 is connected by way of a conductor 9 to the deflection electrode 'swm'eh is furthermore coupled through a resistor Into the positive terminal of the battery H.
  • the collecting electrode 1 is connected directly toj'the positive terminal of the battery H.
  • the deflection electrode 5 is connected 'to a tap on 'the battery ll.
  • the beam may be caused to move from one stable position to another by supplying (by means not shown) an impulse to point I6 such that the'voltage at point [6 changes abruptly to a value within the area of attraction of the desired stable position.
  • Siippose'the beam initially occupies the starting position 35.
  • A'first negative current impulse at point 16 then shifts the beam to the position 23, the second impulse shifting the beam from position 23 to position 24 and so on until after six impulses position 28 is reached.
  • the beam is adjusted to the 'left- -hand edge of the left-hand 'end aperture '1 of "the 'collectin electrode 1.
  • the seventh impulse causes the 'beam'back to return to the initial position '35 as follows:
  • the secondary-emission collecting electrode I2 is arranged at the left-hand sideof the collecting system 1, 8.
  • the electrode l3, which is gridshaped in the present example and arranged in front of the electrode 'l2,' is locatedin the im- "inedia't'e vicinity of the said electrode 12.
  • the electrode l3 is connected to the 'deflection'elc- 'trode'B through a capacitor l4 and furthermore connected through a resistor l5 to the positive terminal of battery H.
  • the electro'de I2 is connected through a resistor [8' to a tap on the battery 1!. Consequently, the potentialof the electrode l3 exceeds that "of 'the'electrode [2 if the electrode ['2 is not struck by the beam.
  • the electrode IZ' is coupled through 'a'capacitor to the" control "electrode 3 "which is fconne'ctedto'the cathode 2through a resistorl9.
  • the seventh impulse shifts the "beam from the stable position at the 'left-handedge of the lefthand (and aperture 1"'of "the electrode '1 to the left so that itstrikes the electrode [2, from which secondary electrons are produced. Since the "miinber of secondary electrons leaving the elecstill further to the lefton the electrode l2. Howeve'r,the beamcannot leave'theelectrode 12 at the left ha'nd end, since in this case the'current passing to this electrode would decrease and the transmitted impulse we-111a decay.
  • the beam During its motion to the right, the beam would alternately pass through the apertures 7 of the electrode 1 and strike the electrode 8 so that an additional current would flow through the conductor 9, by which current the voltage impulse supplied through the capacitor 14 would be counteracted and the fiyback retarded. This is prevented, since the negative voltage impulse, which occurs when the electrode 12 becomes discharged, is transmitted through the capacitor to the control electrode 3. This negative voltage impulse has such a value that the beam is completely cut off during the flyback.
  • the flyback may be accelerated by connecting the electrode 12 to the deflection electrode 5 through a capacitor (not shown), in which event a resistor should be included in the circuit connecting the electrode 5 to the battery H.
  • the circuit-arrangement may be altered in various ways without departing from the scope of the invention.
  • the electrode 13 may be arranged beside the secondaryemission collecting electrode I2 and the electrode 12, instead of being coupled to a control electrode 3, may alternatively be coupled to the means 4 for producing the electron beam.
  • a cathode-ray tube circuit comprising a cathode-ray tube provided with an electron gun for producing an electron beam, a collecting electrode system for said beam, deflection means coupled to said system for deflecting said beam across said system whereby said beam assumes a plurality of stable positions, a first secondary emission electrode disposed at a point in which said first electrode is struck by said beam at the extreme of its deflection and a second electrode disposed to collect the electrons emitted by said first electrode, first and second means each in.
  • a cathode-ray tube circuit comprising a cathode-ray tube provided with an electron gun for producing an electron beam, a collecting electrode system for said beam, deflection means coupled to said system for deflecting said beam across said system whereby said beam assumes a plurality of stable positions, an intensity control electrode for controlling the intensity of said beam, a first secondary emission electrode disposed at a point in which said first electrode is struck by said beam at the extreme of its deflection and a second electrode disposed to collect the electrons emitted by said first electrode, first, second and third means each including a resistance for supplying first, second and third potentials to the first, second and control electrodes respectively, said first and second potentials having values at which said second potential exceeds said first potential when the beam is not in its point of extreme deflection, the potential at said second electrode being decreased when the beam is shifted to the extreme point from a stable position, means to apply input signals to said deflection means to deflect said beam, means capacitively coupling said first electrode to said control electrode, and means
  • a circuit as set forth in claim 2 further comprising fourth means including a resistance for supplying a fourth potential to said deflection means, and means capacitively coupling said first electrode to said deflection electrode.
  • an electron gun for producing an electron beam
  • a collecting electrode provided with apertures and disposed in the path of said beam
  • an additional collecting electrode placed behind said collecting electrode with respect to said beam
  • deflection means for deflecting said beam across said collecting electrode
  • a control electrode interposed in the path of said beam at a point adjacent to said gun for controlling the intensity of said beam
  • a first secondary emission reset electrode disposed at a point in which said first electrode is struck by said beam at the extreme of its deflection
  • a second electrode disposed to collect the electrons emitted by said first electrode.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electron Beam Exposure (AREA)
  • Measurement Of Radiation (AREA)
  • Details Of Television Scanning (AREA)
US202346A 1950-02-14 1950-12-22 Multianode cathode-ray tube circuit having a rapid flyback action Expired - Lifetime US2617074A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL151656A NL82254C (de) 1950-02-14 1950-02-14

Publications (1)

Publication Number Publication Date
US2617074A true US2617074A (en) 1952-11-04

Family

ID=33028940

Family Applications (1)

Application Number Title Priority Date Filing Date
US202346A Expired - Lifetime US2617074A (en) 1950-02-14 1950-12-22 Multianode cathode-ray tube circuit having a rapid flyback action

Country Status (7)

Country Link
US (1) US2617074A (de)
BE (1) BE501196A (de)
CH (1) CH289184A (de)
DE (1) DE857248C (de)
FR (1) FR1039631A (de)
GB (1) GB695584A (de)
NL (2) NL151656B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733379A (en) * 1950-10-12 1956-01-31 Device of the kind comprising an elec-

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1257971A (en) * 1917-02-17 1918-03-05 Joseph Bethenod Generator of sustained electric oscillations.
US2305617A (en) * 1940-03-15 1942-12-22 Rca Corp Cathode ray tube and circuit
US2463535A (en) * 1946-03-22 1949-03-08 Bell Telephone Labor Inc Electron discharge device
US2477008A (en) * 1945-08-01 1949-07-26 Rosen Leo Electrical apparatus
US2496633A (en) * 1947-12-24 1950-02-07 Bell Telephone Labor Inc Multitarget cathode-ray device
US2532747A (en) * 1948-03-16 1950-12-05 Hartford Nat Bank & Trust Co Circuit arrangement comprising a cathode-ray tube
US2532738A (en) * 1946-10-23 1950-12-05 Hartford Nat Bank & Trust Co Arrangement comprising a cathoderay tube having means for deflecting the cathode-ray beam
US2564908A (en) * 1949-03-08 1951-08-21 Nat Union Radio Corp Voltage sampling and electron beam holding arrangement

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1257971A (en) * 1917-02-17 1918-03-05 Joseph Bethenod Generator of sustained electric oscillations.
US2305617A (en) * 1940-03-15 1942-12-22 Rca Corp Cathode ray tube and circuit
US2477008A (en) * 1945-08-01 1949-07-26 Rosen Leo Electrical apparatus
US2463535A (en) * 1946-03-22 1949-03-08 Bell Telephone Labor Inc Electron discharge device
US2532738A (en) * 1946-10-23 1950-12-05 Hartford Nat Bank & Trust Co Arrangement comprising a cathoderay tube having means for deflecting the cathode-ray beam
US2561057A (en) * 1946-10-23 1951-07-17 Hartford Nat Bank & Trust Co Circuit arrangement comprising a cathode beam tube provided with means for deflecting the cathode beam
US2496633A (en) * 1947-12-24 1950-02-07 Bell Telephone Labor Inc Multitarget cathode-ray device
US2532747A (en) * 1948-03-16 1950-12-05 Hartford Nat Bank & Trust Co Circuit arrangement comprising a cathode-ray tube
US2564908A (en) * 1949-03-08 1951-08-21 Nat Union Radio Corp Voltage sampling and electron beam holding arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733379A (en) * 1950-10-12 1956-01-31 Device of the kind comprising an elec-

Also Published As

Publication number Publication date
NL151656B (nl) 1955-10-15
GB695584A (en) 1953-08-12
NL82254C (de) 1956-08-15
CH289184A (de) 1953-02-28
FR1039631A (fr) 1953-10-08
BE501196A (de) 1952-05-09
DE857248C (de) 1952-11-27

Similar Documents

Publication Publication Date Title
US2446945A (en) Electronic computing device
US2561057A (en) Circuit arrangement comprising a cathode beam tube provided with means for deflecting the cathode beam
US2599949A (en) Electronic stepping switch
US2412467A (en) Electronic computer
US2199278A (en) Electron discharge device
US2472779A (en) Cathode-ray tube amplifier
US2436677A (en) Incremental deflection of cathoderay beam
US2564908A (en) Voltage sampling and electron beam holding arrangement
US2617074A (en) Multianode cathode-ray tube circuit having a rapid flyback action
GB676968A (en) Improvements in circuits for cathode-ray tubes
US2594703A (en) Photomultiplier tube circuit
GB609519A (en) Pulse translator
US2644909A (en) Circuit-arrangement comprising a cathode-ray tube
US2691101A (en) Sweep circuit
US2617072A (en) Device for switching contact circuits for signaling purposes
US2512984A (en) Secondary emission tube ring circuit
US2795732A (en) Means for indexing the electron beam in magnetron type beam switching tubes
US2416355A (en) Impulse generator circuits
US2235016A (en) Electron discharge device
US2807747A (en) Pulse-counting systems
US2954466A (en) Electron discharge apparatus
US2878420A (en) Magnetron-type beam switching tube
US2881352A (en) Device for the selection of electric pulses according to their heights
GB771509A (en) Control circuit for cathode ray tube
US3129333A (en) Broad range radiation meter circuit