US2522291A - Cathode-ray tube with target controlled deflecting plates - Google Patents

Cathode-ray tube with target controlled deflecting plates Download PDF

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Publication number
US2522291A
US2522291A US617631A US61763145A US2522291A US 2522291 A US2522291 A US 2522291A US 617631 A US617631 A US 617631A US 61763145 A US61763145 A US 61763145A US 2522291 A US2522291 A US 2522291A
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United States
Prior art keywords
electrodes
anodes
target
anode
electrode
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Expired - Lifetime
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US617631A
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English (en)
Inventor
Warren A Marrison
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AT&T Corp
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Bell Telephone Laboratories Inc
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Priority to NL71624D priority Critical patent/NL71624C/xx
Application filed by Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US617631A priority patent/US2522291A/en
Priority to GB23858/46A priority patent/GB639191A/en
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    • 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
    • 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 electrical signal translating devices and particularly to those of the electronic type.
  • Objects of the invention are to extend the field of usefulness of electronic devices and to make them more readily applicable to electrical systems for such purposes as selection, distribution, registration, repetition and for other signal translating functions.
  • Another object is to increase the accuracy, dependability and general utility of electronic beam devices.
  • a beam selector it may be desirable in a beam selector to advance the electron beam under the control of incoming signals to a predetermined electrode and to hold the beam on such electrode as an indication of the selection made. If the signal potentials are too strong or too weak or if they tend to leak OE and dissipate, the beam will not be accurately positioned with respect to the electrode, or, if positioned accurately, it may gradually shift its position, thus impairing the efiect of the intended selection.
  • applicant has devised a novel means for securing and maintaining a high degree of precision in the operation of electron-beam devices. More specifically, applicant has devised an electron-beam tube in which special electrodes are provided for the purpose of preventing any unwanted deviation of the beam from its intended location with respect to the working electrodes of the tube. Once the beam has been moved into a desired position with respect to a Working electrode, it is accurately maintained in that position by the presence of said special or auxiliary electrodes. If for any reason it tends to depart from its proper position, potentials are established on the special electrodes which operate automatically to restore the beam to its proper position.
  • a feature of the invention is an electron tube having a coordinate field of selectable electrodes together with means for preventing the beam from deviating in any direction from a selected one of the electrodes on which it has been positioned. 7
  • Another feature of the invention is an electronbeam tube having electromagnetic means for correcting and adjusting the position of the beam with respect to the working electrodes.
  • Fig. 1 illustrates the invention when applied to an electron-beam tube having a single array of objective anodes
  • Fig. 2 is an enlarged fragmentary view showing the relation between the beam and the electrodes
  • Fig. 3 illustrates one possible arrangement of work circuits connected to the anodes of the tube
  • Fig. 4 illustrates the invention applied to a tube having a coordinate field of obj ective anodes
  • Fig. 5 is an end-view of the tube of Fig. 4 showing the field of objective anodes and a grid-work of auxiliary electrodes for correcting deviation of the beam;
  • Fig. 6 is an alternative structure in which the correction of the beam is effected by electromagnetic means.
  • the electron-beam translating device here illustrated includes a sealed.
  • vessel I00 containing means for developing a stream or beam of electrons and causing the beam to impinge selectively on any desired one of a series of objective anodes
  • the stream of electrons is developed by a cathode IOI and propagated by an accelerating anode I02 toward the forward end of the vessel or tube I00 where it is capable of engaging any one of a series of target controlled by a pair of deflector plates H3 and IM.
  • the beam H2 is caused to advance to corresponding ones of the objective anodes I 04, I05, I06, etc.
  • the beam IIZ rests on the normal anode I93 either by virtue of the disposition of the accelerating anode I82 or by a biasing voltage applied to the plates H3 and H4 in any suitable manner or by an additional set of control plates.
  • the forward end of the tube is also equipped with an auxiliary electrode, the purpose of which is to hold the beam in a selected position.
  • This auxiliar electrode comprises a plate l I5, which is disposed behind the objective anodes I04, I55, I06, etc., and in such a position that the beam I'I'2 impinges on said electrode when it is not in full engagement with some one of the objective anodes.
  • auxiliary electrode !5 sets up a voltage, which depends for its magnitude upon the degree of exposure to the beam, and which is applied across the control plates I I5 and II! for the purpose of correcting the beam deviation.
  • electron-beam devices of the type disclosed in Fig. 1 may be suitable for a Wide variety of purposes. In particular they are useful where it is desirable to store or register information, such as numbers or other charasters, for present or future use.
  • Such an application is illustrated in Fig. l where incoming electrical impulses from a transmitting dial are received and translated by the tube into a corresponding position of the beam.
  • condenser I22 may now be traced from the positive grounded pole of battery I25 over conductor I26, back contact I2? of relay I I9, condenser I22, contact-protective resistor I23, front contact I28 of relay I29 to the negative pole of battery I25.
  • a definite predetermined charge is acctunulated on condenser I22 during the open period of the impulse.
  • the dial contacts close and relay I I9 reoperates.
  • the charged condenser I22 is now connected to the larger condenser I'ZI for the purpose of transferring its charge thereto.
  • the circuit for this transfer may be traced from the upper terminal of condenser I22 through the front contact I29 of relay H9, front contact I38 of relay I20, condenser I2I, resistor I23 to the opposite terminal of condenser I22.
  • relay I I9 releases, and condenser I22 is recharged for the second impulse.
  • relay H9 operates, and the charge on condenser I22 is transferred to condenser I2! where it is added to the charge representing the previous impulse.
  • each of the succeeding impulses re- The impingement of the beam on the 4 sults in the addition of an incremental charge to the condenser I2I.
  • the condenser I2! is connected across the control plates H3 and H4, wherefore the increasing charges applied to the condenser cause the application. of increasing voltages to said control plates.
  • Each of these voltage increments is just sufiicient to advance the electron beam I I2 from one anode to the next. That is to say, the voltage applied to plates H3 and N l in response to the first impulse causes the beam H2 to move from the normal anode N33- to the No. lanode Hit, the increased voltage resulting from the second impulse causes the beam to move from anode HM to the No. 2 anode I85, and likewise for each succeeding impulse until the beam H2 is finally brought to rest on the No. 9% anode I88.
  • the objective anodes I'M, I85, E55, etc, may be connected to any suitable type of work circuit.
  • resistors are illustrated, and in Fig. 3 the voltages developed in these resistors serve to operate responsive devices such as discharge tubes 309, 35H, etc.
  • the beam 382 is driven to the No. 9 objective anode 353, the current flowing by way of the beam and anode 353 throughresistor 3M develops a voltage which is applied across the control electrodes of the tube 300.
  • This voltage causes the tube to ionize, whereupon current fiows from the positive pole of batter 305, resistor 3&6, across the anode-cathode gap of the tube 355 thence to ground.
  • the voltage developed in the resistor 306 may be used for any suitable purpose such as indication or control.
  • the beam I I2 may impinge briefly on the auxiliary electrode H5 as it steps from. one objective anode to the next. of course, is not objectionable since the voltage developed by the engagement of the beam with the electrode 5 E 5 is in the direction to move the beam
  • key H8 is opened, and relay II9 releases and opens the circuit of relay I20. After an interval relay I20 releases and in so doing closes a short circuit around the condenser I2I. Condenser I2I becomes fully discharged, and the beam II2 returns to its normal position anode I03.
  • the tube 400 shown in Figs. 4 and is provided with a coordinate field of objective anodes, and the beam 40I is driven in two coordinate movements to select any desired one of the anodes.
  • the number of anodes may be chosen to suit the requirements; for example, the field may include 100 anodes arranged in ten rows of ten anodes per row. In the drawings only twenty anodes 402, 403, 404, 405, etc., have been shown for the sake of simplicity.
  • the beam 40I is driven in a vertical direction by means of deflector plates 4 and M2 for the purpose of selecting a horizontal row of anodes and is driven horizontally by deflector plates M3 and M4 to select a particular anode in the horizontal row.
  • the voltages for driving the beam are supplied to plates 4
  • each one of these auxiliary electrodes includes a plurality of parallel extensions which collectively form a frame or boundary for each of the individual objective anodes, as seen in Fig. 5.
  • the anode 406 is bounded on the right by the extension 42I of electrode 420, on the left by extension 422 of electrode M9, on the upper side by extension 423 of electrode 4H, and on the lower side by extension 424 of electrode 4I8.
  • Electrode 4 I I is connected to plate 425 of the pair of vertical deflecting plates 425426, which serve to apply a vertical correction to the beam in one direction.
  • the auxiliary electrode M8 is connected to plate 428 of the pair of vertical deflecting plates 427-428, which serve to apply a vertical correction in the opposite direction.
  • Auxiliary electrode 4I9 is connected to plate 429 of the pair of horizontal deflecting plates 429430, which serve to apply a horizontal correcting movement of the beam to the right as seen in Fig. 5.
  • the electrode 420 is connected to plate 432 of the pair of horizontal deflecting plates 43I432, which serve to apply a horizontal correcting movement of the beam to the left.
  • the voltage'on the'deflecting plates 4ll and M2 varies in such a manner as to cause the beam to digress upwardly, a portion of the beam will engage the extension 423 on the auxiliary electrode 4I'I.
  • This engagement of the beam with theauxiliary electrode causes a correcting voltage to be applied to the plates 425 and 426 over a circuit which may be traced from the positive pole of battery 433, conductor 436, plate 426, plate 425, auxiliary'electrode 4II, beam 40I,
  • the condenser 6I4 acquires a charge in this circuit, the polarity of which opposes the biasing battery 6I5 and causes the tube '3 I 6 to conduct.
  • Current now flows over a circuit traceable from the positive pole of battery SI 1 through the coils 6 I8 and BIB; anode and cathode of tube BIB thence in parallel through condenser 3
  • the current flowing in coils (H8 and GIS sets up a magnetic field ascaaci 7 ⁇ l/lietisclaimed is: i1.
  • An electronic beam device comprising a plurallity of target anodes, means opposite said anodes for projecting an electron beam thereto, auxiliary electrode means adjacent and laterally beyond said anodes for intercepting electrons in said beam directed to pass by said anodes, means for driving said beam over said anodes, and means for efiecting a definite relation between said beam and a particular one of said anodes comprising means for deflecting said beam and coupled to said auxiliary electrode means to be controlled in accordance with the beam current impinging upon said auxiliary electrode means.
  • An electrical beam device comprising a plurality of fixed electrodes arranged in spaced relation, means opposite said electrodes for producing a beam of energy for engagement with said fixed electrodes, an auxiliary electrode adjacent and so disposed with respect to said fixed electrodes that said beam impinges on said auxiliary electrode when it is not in full engagement with some one of the fixed electrodes, means for moving said beam into engagement with a predetermined one of said fixed electrodes, and means responsive to the impingement of the beam on said auxiliary electrode in the event the beam fails to fully engage the predetermined fixed electrode for automatically adjusting the position of the beam in the direction of full engagement with said predetermined electrode, said means comprising beam control deflecting means activated by the energy derived from the beam by the auxiliary electrode.
  • An electrical beam device comprising a plurality of fixed electrodes arranged in spaced relation, means opposite said-electrodes for producing a beam of energy for engagement with said electrodes, means for moving said beam into engagement with a particular one of said electrodes, auxiliary electrode means adjacent said electrodes for deriving energy from said beam in response to its departure from a predetermined relation with said particular electrode, and'beam deflecting means for utilizing the energy derived from said beam by said auxiliary electrode means for automatically reestablishing said predetermined relation.
  • a plurality of electrodes arranged in spaced relation, means opposite said electrodes for producing a beam of energy .for engagement with said electrodes, means for moving said beam into a position to engage a particular one of said electrodes, means comprising an auxiliary electrode effective only when said beam recedes from a prescribed position of engagement with said particular electrode for deriving from the beam an amount of energy proportional to the recession,-and beam deflecting means utilizing the energy derived from said beam by said auxiliary electrode means to restore the beam to its position of engagement with said particular electrode.
  • a plurality of electrodes disposed in a coordinate field, means opposite said electrodes for producing a beam of energy for engagement with said electrodes, means for moving said beam into a position to engage a predetermined one of said electrodes,
  • auxiliary electrode means cooperating with auxiliary electrode means responsive to the departure in any direction of said beam from its position of engagement for restoring said beam to its said position of engagement with said predetermined electrode, said auxiliary electrode means having portions laterally beyond said electrodes.
  • An electrical beam device comprising aplurality offixe'd electrodes arranged in a coordinate field, meansopposite said electrodes for producing a 'beam of energy ,for'engagement with said fixed electrodes, a plurality of auxiliary electrodes 'bordering'each of said fixed electrodes and subject to engagement by said beam of energy, means for driving said beam into engagement with a predetermined one ofsaid fixed electrodes, and beam deflecting means including said auxiliary electrodes and effective in response'to the engagement of the beam with said auxiliary electrodes for maintaining said beam in its position of engagement with said predetermined fixed electrode.
  • Anelectrical beam device comprising a plurality of target :anodes, means opposite said anodes for projecting a beam of energy thereto, means for causing movement'of said beam relative to said target anodes and for .positioningsaid beam in engagement with a predetermined one of said target anodes, and means for maintaining said beam positioned on said target anode comprising an auxiliary electrode for intercepting said beam when it departs from said target anode and beam deflecting means coupled to said auxiliary electrode and energized by the beam energy intercepted by said auxiliary electrode.
  • An electronic beam device comprising means for producing a beam of electrons, a series of target anodes opposite said means located in a line, means for moving said beam along said line of anodes, auxiliary electrodes subject to impingement by said beam, located on both sides of and parallel to the line of said target anodes, and means for restricting the movement of said beam to a path between said auxiliary electrodes comprising beam deflecting means electrically connected to said auxiliary electrodes and energized when the electron beam deviates from said path to impinge upon one of said auxiliary electrodes.
  • An electronic beam device comprising means for producing a beam of electrons, a plurality of target anodes opposite said means, a plurality of auxiliary electrodes positioned relative to said target anodes to form a frame about each target, means for positioning said beam substantially within the frame of any one target, and beam deflecting means energized when said beam impinges upon any of said auxiliary electrodes for moving said beam towards a centered position within said frame.
  • An electrical beam device comprising means for producing a beam of energy, a group of target areas opposite said means, auxiliary electrodes adjacent said target areas, means for moving said beam into one of said target areas, and deflecting means energized when said beam tends to drift out of said target area, into impingement with an adjacent auxiliary electrode, for retaining said beam within said target area.
  • An electrical beam device comprising means for producing a beam of energy, a group of target areas opposite said means and bounded by auxiliary electrodes, means for positioning said beam on any one of said target areas, and deflecting means energized when said beam drifts from its position with respect to said target area, into impingement with a boundary auxiliary electrode, for containing the beam substantially within the target area.
  • An electron discharge device comprising a target having an edge extending in one coordinate direction of a two coordinate plane system, means opposite one face of said target for projecting an electron beam thereto, means for deflecting said beam in the second coordinate direction, and means for controlling the position of said beam in said second direction to position said beam upon said target, said controlling means comprising an auxiliary electrode opposite the other face of said target and extending beyond said edge to intercept electrons in said beam which pass beyond said target and a feedback connection between said auxiliary electrode and said deflecting means.
  • An electron discharge device comprising a plurality of imperforate targets having corresponding edges extending in one coordinate direction of a two coordinate plane system, means to one side of said targets for projecting a concentrated electron stream thereto, means for defleeting said stream in the second coordinate direction of said system, and means for controlling the position of said stream in said second direction, said controlling means comprising means to the other side of said targets and responsive to electrons in said stream which pass to said other side, and connected in feedback relation to said deflecting means.
  • An electron discharge device comprising target means including a plurality of imperforate elements having corresponding edges extending in one coordinate direction of a two coordinate plane system, means to one side of said target means for projecting a concentrated electron stream to said elements, means fordeflecting said stream in the second coordinate direction of said system, and means for controlling the position of said stream in said second direction, said controlling means comprising electron receiving means to the other side of said target means and extending beyond said edges to intercept electrons in said stream which pass by said edges, said controlling means comprising also a direct conductive feedback circuit between said electron receiving means and said deflection means energized proportionately to the stream current to said electron receiving means.
  • An electron discharge device comprising a row of imperforate target electrodes having corresponding edges extending substantially normal to the direction of said row, means to one side of said target electrodes for projecting a concentrated electron stream thereto, means for deflecting said stream in said direction to selectively direct said stream to impinge upon any one of said target electrodes, and means for controlling the deflecting force due to said deflecting means comprising auxiliary electrode means mounted to the other side of target electrodes and extending beyond said edges to intercept electrons in said stream which pass by any of said edges, said controlling means comprising also a direct conductive feedback connection between said auxiliary electrode means and said deflecting means.
  • An electron discharge device comprising a plurality of targets mounted in a row, an auxiliary electrode having a portion laterally adjacent one side of said targets and extending in the direction of said row, means opposite said targets for projecting an electron beam thereto, a first deflecting means for deflecting said beam over said targets inv said'direction, a second defleeting means for deflecting said beam normal to said direction, and means for controlling the position of said beam in said normal direction comprising said auxiliary electrode, said second deflecting means and a feedback coupling between said auxiliary electrode and said second deflecting means.
  • An electron discharge device in accordance with claim 19 comprising a second auxiliary electrode laterally adjacent the other side of said targets and extending in the direction of said row, and wherein said controlling means comprises a third deflecting means for deflecting said beam in said normal direction and a feedback coupling between said second auxiliary electrode and said third deflecting means.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Electron Sources, Ion Sources (AREA)
US617631A 1945-09-20 1945-09-20 Cathode-ray tube with target controlled deflecting plates Expired - Lifetime US2522291A (en)

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NL71624D NL71624C (en, 2012) 1945-09-20
US617631A US2522291A (en) 1945-09-20 1945-09-20 Cathode-ray tube with target controlled deflecting plates
GB23858/46A GB639191A (en) 1945-09-20 1946-08-12 Improvements in electric beam switching devices

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587734A (en) * 1947-12-22 1952-03-04 Meguer V Kalfaian Modulator tube and circuits
US2617075A (en) * 1949-04-09 1952-11-04 Hartford Nat Bank & Trust Co Electric discharge tube comprising means for producing and deflecting an electron beam
US2644909A (en) * 1950-03-06 1953-07-07 Hartford Nat Bank & Trust Co Circuit-arrangement comprising a cathode-ray tube
US2666162A (en) * 1949-10-21 1954-01-12 Commw Scient Ind Res Org Electronic counting device
US2692727A (en) * 1949-08-27 1954-10-26 Gen Electric Apparatus for digital computation
US2695974A (en) * 1950-02-24 1954-11-30 Nat Union Radio Corp Two-dimensional pulse counting or registering tube
US2718611A (en) * 1952-10-31 1955-09-20 Gen Dynamics Corp Cathode ray control apparatus
US2721900A (en) * 1950-06-29 1955-10-25 Bell Telephone Labor Inc Non-linear encoded transmission
US2728873A (en) * 1953-01-13 1955-12-27 Gen Dynamics Corp Cathode ray control apparatus
US2757313A (en) * 1951-06-21 1956-07-31 Westinghouse Electric Corp Tricolor television picture tube
US2807747A (en) * 1952-07-05 1957-09-24 Nat Union Electric Corp Pulse-counting systems
US2812133A (en) * 1952-06-19 1957-11-05 Bell Telephone Labor Inc Electronic computing device
US2853694A (en) * 1952-06-11 1958-09-23 Bell Telephone Labor Inc Electron discharge tube circuit
US2925507A (en) * 1955-07-21 1960-02-16 Royal V Keeran Code sorter tube
US2940003A (en) * 1956-08-14 1960-06-07 Philips Corp Counting tube arrangement
US2961485A (en) * 1956-06-18 1960-11-22 Telefunken Gmbh Remote indicator system
US3195219A (en) * 1961-02-16 1965-07-20 American Optical Corp Energy conducting device
US3459984A (en) * 1966-12-07 1969-08-05 Dale R Koehler Multiplier logic tube

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US2190069A (en) * 1936-06-23 1940-02-13 Radio Patents Corp Space discharge device
US2224677A (en) * 1939-03-23 1940-12-10 Bell Telephone Labor Inc Signaling system
US2287296A (en) * 1938-04-09 1942-06-23 United Incandescent Lamp & Ele Disturbance supperssion in radio receivers
US2305617A (en) * 1940-03-15 1942-12-22 Rca Corp Cathode ray tube and circuit
US2357922A (en) * 1941-12-06 1944-09-12 Electronbeam Ltd Electronic translating device
US2395299A (en) * 1939-11-13 1946-02-19 Bell Telephone Labor Inc Electron discharge apparatus
US2404106A (en) * 1943-08-13 1946-07-16 Rca Corp Electronic calculating device
US2417450A (en) * 1945-05-02 1947-03-18 Bell Telephone Labor Inc Electron discharge device
US2446945A (en) * 1942-08-25 1948-08-10 Rca Corp Electronic computing device

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Publication number Priority date Publication date Assignee Title
US2190069A (en) * 1936-06-23 1940-02-13 Radio Patents Corp Space discharge device
US2287296A (en) * 1938-04-09 1942-06-23 United Incandescent Lamp & Ele Disturbance supperssion in radio receivers
US2224677A (en) * 1939-03-23 1940-12-10 Bell Telephone Labor Inc Signaling system
US2395299A (en) * 1939-11-13 1946-02-19 Bell Telephone Labor Inc Electron discharge apparatus
US2305617A (en) * 1940-03-15 1942-12-22 Rca Corp Cathode ray tube and circuit
US2357922A (en) * 1941-12-06 1944-09-12 Electronbeam Ltd Electronic translating device
US2446945A (en) * 1942-08-25 1948-08-10 Rca Corp Electronic computing device
US2404106A (en) * 1943-08-13 1946-07-16 Rca Corp Electronic calculating device
US2417450A (en) * 1945-05-02 1947-03-18 Bell Telephone Labor Inc Electron discharge device

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587734A (en) * 1947-12-22 1952-03-04 Meguer V Kalfaian Modulator tube and circuits
US2617075A (en) * 1949-04-09 1952-11-04 Hartford Nat Bank & Trust Co Electric discharge tube comprising means for producing and deflecting an electron beam
US2692727A (en) * 1949-08-27 1954-10-26 Gen Electric Apparatus for digital computation
US2666162A (en) * 1949-10-21 1954-01-12 Commw Scient Ind Res Org Electronic counting device
US2695974A (en) * 1950-02-24 1954-11-30 Nat Union Radio Corp Two-dimensional pulse counting or registering tube
US2644909A (en) * 1950-03-06 1953-07-07 Hartford Nat Bank & Trust Co Circuit-arrangement comprising a cathode-ray tube
US2721900A (en) * 1950-06-29 1955-10-25 Bell Telephone Labor Inc Non-linear encoded transmission
US2757313A (en) * 1951-06-21 1956-07-31 Westinghouse Electric Corp Tricolor television picture tube
US2853694A (en) * 1952-06-11 1958-09-23 Bell Telephone Labor Inc Electron discharge tube circuit
US2812133A (en) * 1952-06-19 1957-11-05 Bell Telephone Labor Inc Electronic computing device
US2807747A (en) * 1952-07-05 1957-09-24 Nat Union Electric Corp Pulse-counting systems
US2718611A (en) * 1952-10-31 1955-09-20 Gen Dynamics Corp Cathode ray control apparatus
US2728873A (en) * 1953-01-13 1955-12-27 Gen Dynamics Corp Cathode ray control apparatus
US2925507A (en) * 1955-07-21 1960-02-16 Royal V Keeran Code sorter tube
US2961485A (en) * 1956-06-18 1960-11-22 Telefunken Gmbh Remote indicator system
US2940003A (en) * 1956-08-14 1960-06-07 Philips Corp Counting tube arrangement
US3195219A (en) * 1961-02-16 1965-07-20 American Optical Corp Energy conducting device
US3459984A (en) * 1966-12-07 1969-08-05 Dale R Koehler Multiplier logic tube

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NL71624C (en, 2012)
GB639191A (en) 1950-06-21

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