US2083204A - Braun tube - Google Patents

Braun tube Download PDF

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US2083204A
US2083204A US694915A US69491533A US2083204A US 2083204 A US2083204 A US 2083204A US 694915 A US694915 A US 694915A US 69491533 A US69491533 A US 69491533A US 2083204 A US2083204 A US 2083204A
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plates
plate
ray
deflecting
potential
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US694915A
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Schlesinger Kurt
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/80—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/52—Arrangements for controlling intensity of ray or beam, e.g. for modulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/70—Arrangements for deflecting ray or beam
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/12—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor

Definitions

  • the object of the invention is a Braun tube, which avoids all of the errors referred to, and possesses an extremely simple structure of the system permitting of the proper centering of all 25 parts without the use of special means.
  • the innermost plate of which is linked up with a 30 positive potential, which is higher than the maximum positive deflection potential occurring, and possesses a slot of suitable size preferably at the center.
  • this third plate the space between the earthed deflecting plate (earth plate) 35 and the plate connected with the deflecting generator (control plate) is divided into. two parts.
  • the plates are constructed and arranged in such fashion that the electric field of the middle plate 40 is perfectly symmetrical on both sides of the same.
  • the ray proceeding from the anode passes parallel to the earth plate into the space between earth plate and middle plate, is attracted by the high positive bias of the middle 4 plate towards the latter and through the slot and,--owing to the symmetrical nature of the fields-leaves the space between the middle plate and the control plate, in the position of rest, in a direction which is parallel to its direction of 50 entry and is displaced to the extent of a few millimetres in relation thereto.
  • the second deflecting system is also constructed as a three-part system, whereby the ray is also bent oil in the space between the earth plate and the middle plate, and deflected, i. e., directed into the space between the middle plate and the control plate.
  • the plates of this system may possess a trapezoidal basic form, and the edge of the earth plate directed towards the first deflecting system, the edges of the middle and control plates directed away from the first deflecting system and also the slot in the middle plate may conveniently be rounded oil.
  • the middle plate in accordance with the invention, is provided with a positive bias, which is higher than the maximum positive deflecting potential occurring, all stray electrons are attracted towards the middle plate.
  • the control plate accordingly remains perfectly free of crosscurrent, so that the cross-current fault is unable to take place.
  • the "ion cross defect is moved outside of the field of the image by the bending of the ray.
  • Below the plane of entry of the ray the field of the control plate may be screened off without difllculty against the first system by means of a screening plate, which is secured for example to the middle plate. In this manner it is possible to avoid reaction of the marginal fields, and accordingly to obtain images, which are perfectly free of the error in form.
  • a particular advantage of the arrangement according to the invention is to be seen in the fact that the bending of the ray, necessary for the purpose of avoiding the ion-cross", may be performed separately in the vertical and the horizontal direction.
  • the ray in the arrangement according to the invention possesses merely an extremely small parallax (approximately 4 mm. or less), the system is wholly straight-sighted, so that an extremely simple structure is ensured, which 4 permits of proper centering with the most simple means. Since reaction of the marginal fields is eliminated owing, in accordance with the invention, to the screening oil? of the control plate of the second system, it is possible to dispose the control plate systems extremely close together one behind the other (for example 5 mm. or less). In this manner a very compact system structure is rendered possible.
  • the sensitivity of the deflecting system according to the invention may be increased toan appreciable extent by disposing the plates, not parallel, but obliquely to each other.
  • the deflecting system itself as light control means.
  • the intensity control potential is applied in series with the positive bias to the middle plate-constructed in the manner described-of the first deflecting system, a faultlessly operating shuttering control device is obtained which, dependent on the extent of the light potential, shutters oiI larger or smaller parts of the cathode ray entering the first control plate system. It is naturally also possible to employ a system of this nature as independent light control means.
  • the high positive bias applied to the middle plate is conducted in the manner known per se to an auxiliary electrode, which is arranged preferably in front of the deflecting system and then takes up the electronic return current entirely.
  • Fig. 1 shows a Braun tube having two threepart deflecting systems
  • Figs. 2 and 3 show two particular forms of embodiment of a three-part deflecting system according to the invention
  • Figs. 4 and 5 are two circuit arrangements for operating the tube according to Fig. 1.
  • Figs. 6 and 7 show diagrammatically two forms of embodiment of the deflecting system according to the invention, constructed simultaneously as light control means.
  • Fig. 8 shows a Braun tube furnished with three-part deflecting systems, the middle plate of which is bent to angles.
  • Fig. 9 shows a Braun tube furnished with threepart deflecting systems, the side parts of which are shortened.
  • Fig. 10 shows a connection-diagram for the Braun tube shown in Fig. 9.
  • Fig. 11 shows a view of a Braun tube according to the invention.
  • Fig. 12 shows a Braun tube with a control element according to the invention in which the systems producing the parallel displacement are constructed as three-plate systems with flatmiddle plate, whilst in Fig. 13 the three-plate system possesses a middie plate which is bent to angles.
  • l is the wall of the Braun tube
  • 3 the cathode
  • 4 a preliminary anode
  • 5 an after-concentration cylinder
  • 6 the after-acceleration anode
  • l5 and I 6 are the two three-part deflecting plate systems according to the invention, which consist of the earth plates 8 or I l, the middle plates 9 or ill furnished with the slots l4 or 20, and the control plates ill or 19.
  • the earth plates 8 and I1 are'connected with the preferably earthed anode line I, the middle plates 9 and I8 with the line l2, which is maintained at a suitable positive potential in relation to the anode, whilst to the control plates I 0 or I 9 there are conducted the 7 deflecting potentials indicated in symbolical fashion by the generators l3 and 22.
  • the preferably annular electrode 23, which intercepts the return current electrons is connected with the line l2.
  • the middle plate It of the second system may be provided with a screening plate 2
  • the plate l9 supplied with the deflecting potential of the second system and also the space between the middle plate I8 and the control plate is.
  • the deflecting systems may be dimensioned as follows:
  • 1st system Length of plates 34 mm., width of plates 10 mm., spacing between plates 4 mm., length of slot in the middle plate 4-6 mm., width of the slot greater than 4 mm., preferably approximately 8 mm.
  • 2nd system Form of plate: rounded trapeze, longest edge of trapeze approximately 25 mm., shortest edge of trapeze approximately 10 mm., height of trapeze approximately 10 mm.
  • the dimensions and potentials may be varied within relatively wide limits.
  • the ray emerging from the anode 6 passes parallel to the earth plate 8 into the first system l5 between the earth plate and the middle plate, and is drawn by the positive bias of the middle plate towards the same and through the slot M.
  • the plate 9 Since the plate 9 is constructed and arranged in such fashion that the field is disposed symmetrically on both sides, the ray passing out of the slot l4 into the space between the middle plate and control plate is bent, in the position of rest, to such extent towards the plate 9, that it leaves the space between the plates parallel to its original direction and with a displacement in relation thereto amounting to only a few (approximately 3-4) millimetres.
  • the second deflecting system l6 operates on substantially the same lines. In order to avoid a difference in sensitivity of the plates in different positions of the ray, it is desirable to round off the edges of the plates and also the slot 20 of this second system.
  • the center point of the bounding arc may be situated conveniently approximately at the center of the space between the middle plate and the control plate of the first system.
  • FIGs. 2 and 3 two additional forms of embodiment of the plate system according to the invention are illustrated, in which the earth plate 8, the middle plate 9 and the control plate l0 are disposed at an angle to each other. With this arrangement the sensitivity of the system may be increased in many cases to a considerable extent.
  • Fig. 4 shows a circuit for the tube according to the invention, which is particularly adapted for oscillographic purposes.
  • 24 and 25 are the terminals of a direct current source, say, a rectifier, 26 a condenser, 21 an ohmic high resistance potentiometer 28 an additional condenser.
  • the anode potential is derived from the preferably earthed potentiometer tapping over the line I, and the positive bias from the line l2.
  • the remaining references agree with those in Fig. 1.
  • this circuit for television purposes if the dimensioning is suitably chosen.
  • FIG. 5 An arrangement particularly suitable for television purposes is illustrated by way of example in Fig. 5.
  • a transformer having the primary winding 39, which may for instance be fed from the mains, and the two secondary windings 31 and 38, which co-operate with the two rectiflers 34 and 30, the one of which (it) supplies a powerful current at low tension (approximately 100 mllliamperes at 200 volts). and the other of which (85) supplies a high potential with a low current (approximately 3000 volts with .l milliampere). There accordingly results a potential of -3000 volts in 40, zero in" and +200 volts in 40.
  • the anode of the Braun tube is connected with 41, and the positive bias required according to the invention is taken from the potentiometer 3
  • the condenser 20 may be selected at 1 mf.,
  • the deflecting system at the same time may also be employed as intensity control means.
  • the front edge of the slot ll of the middle plate 9 may be bent upward.
  • the positive bias in series with the light control potential.
  • the bias may preferably be so selected that with the light control potential being zero the ray just completely passes over the edge of the bent upward portion.
  • the potential of the middle plate is shifted into positive, the ray drawn closer to the plate, and accordingly a larger or smaller portion oi the ray cut (shuttered) of! at the edge.
  • Fig. 6 shows a form of embodiment of this kind of an arrangement according to the invention.
  • the earthed plate 9 the m ddle plate with the slot i4, and iii the control plate connected with the deflecting potential 63.
  • the plate is furnished with a sharp edge 40, which bounds the part of the slot l4 situated next to the cathode.
  • the positive bias is conducted to i the plate 9 from the battery 43 over the resistance M, whilst the plate receives the light control potential from the generator ii.
  • the cathode ray proceeding from the anode 0 is deflected in the space between and 0 only in a direction about the constant angle a, whilst in the space between 2 and 3 the ray has to perform the symmetrical oscillation as shown about the angle In, in order to sweep over the entire image screen.
  • the sensitiveness of the plates i. e., the deflection of the ray in millimetres displacement on the screen per volt of deflecting potential
  • the measure according to the invention is of particular importance in connection with those tubes, in which the bending system (i. e., that system which imparts to the my the necessary constant preliminary deflection for avoiding the ion cross and cross-current errors) is specially separated from the deflecting system proper.
  • the spacial angle of deflection which the bending system is required to impart to the ray is equal to sa ll: when a is the maximum angle to' which each of the deflecting systems is required to deflect the ray each in one plane. If in this case it is desired to perform operations with the same auxiliary potential at the bending system and at the two deflecting systems, and on the other hand not to exceed the deflecting potential given by the equation D Q ir) (e the minimum potential necessary for complete deflection; Ea anode potential; D diameter of the bottomof the bulb; L length of path of ray from the middle of plate system in question to the luminous screen), it is necessary to cause the ray to enter the bending system in the manner according to the invention, 1. e., nearly touching the one plate.
  • Length of plates approximately 34 mm.
  • Effective length of field length of he parts 2 or 0 each approximately 14-16 mm.
  • the system in practice would require to receive a greater total length of approximately 5 mm. as the slot aperture in the middle plate is traversed by the ray at a grazing angle, and therefore requires to be made so large that the same will still allow the passage of a greatly increased section of the ray.
  • the conditions set forth result in a width of slot of approximately 8 mm.
  • the width of the slot is reduced to approximately 4 mm., and nevertheless still permits of reliable operation with reduced dimensions throughout.
  • the three-plate systems according to the invention are extremely sensitive even to the smallest magnetic disturbances, and that in consequence it is practically impossible to produce the same from material which is not completely non-magnetic.
  • nickel which has been employed without difliculty in the tubes heretofore known, is apt to have such a strong magnetization, particularly at the welding points, that the effect of the arrangement, and more particularly the possibility of large-scale production, is very questionable.
  • these parts of the system i. e., the deflecting systems themselves, and preferably also the holding means pertaining thereto, are produced from completely non-magnetic material.
  • Fig. 8 a form of embodiment of the deflecting system according to the described feature of the invention is illustrated by way of example.
  • 5 is the preferably earthed anode, I the earthed plate, I the bent middle plate having the end portions 6 and 2 of equal length and the slot 8 and provided with a suitable positive bias in relation to the anode, and 3 the control plate connected to the deflecting potential generator 4.
  • a certain diffusion of the ray may occur within the deflecting systems, which diffusion renders the use of large ray currents more dimcult.
  • the fault referred to under 1 is caused by a field effect exerted by the outer plates at the level of the transverse slot in the middle plate.
  • the outer plates are constructed in such fashion that the formation of this field of disturbance is avoided. For this purpose it is sufficient to make the outer plates so short that they extend exactly up to the projection of the transverse slot, or do not completely cover the same.
  • this metallization is formed in such fashion that the rear part of the neck of the bulb proceeding approximately from the high potential anode remains free from the metallic coating, and that the coating extends only to such a length into the proper bulb that a considerable distance is maintained between the coating and the ray even in the case of maximum deflection of the ray.
  • the coating exerts a deconcentrating effect if it is connected in this known manner with the highest potential which occurs in the tube, i. e., the potential of the middle plate of the deflecting system.
  • This deconcentrating effect may be wholly avoided if the coating is made negative as compared with the ray. An excessive negative potential however causes the intensity of the ray to be considerably diminished.
  • the coating formed as set forth above is connected with a potential, which is weakly negative in relation to the ray, for example with the after-acceleration anode of the system.
  • a potential which is weakly negative in relation to the ray
  • the after-acceleration anode of the system for example with the after-acceleration anode of the system.
  • a deconcentrating effect and at the same time a diminished intensity are avoided.
  • FIG. 9-11 A form of embodiment of the described arrangement according to the invention is shown by way of example in the Figs. 9-11.
  • I is the bulb of the Braun tube, having the cathode 3 and the space charge control cylinder 2 surrounding the cathode, 4 a first anode, 5 an after-concentration cylinder, which preferably possesses a weakly negative potential as compared with the first anode or the same potential as said anode, and 6 the high-voltage anode (I and 6 form the so-called after-arranged electron-optical system).
  • 9 and i8 are the two three-plate deflecting systems, consisting of the outer plates 8 and H), or I1 and i9, and the bent middle plates 9 and It provided with a transverse .slot and raised to a positive potential as compared with the outer plates.
  • the plates 8 and 10 I1 being connected to the high-voltage anode, the potential of the bent middle plate is some higher than that of the high-voltage (f. i. 2000 volts) anode.
  • the outer plates 8 and It), or II and I9 may, in accordance with the invention, be made so short that they reach exactly as far as the projection of the transverse slot.
  • the outer plates are also furnished with transverse slots, the projection of which approximately corresponds with the transverse slot of the middle plate, and if necessary is somewhat larger than this. In this manner it is possible 'to completely avoid the disturbing fields without any structural inconvenience.
  • the middle plates 9 and 16 are shown in the drawings as flat plates. Preferably, however, the same may be bent to angles.
  • 20 is a screen, which screens of the space between the plates l6 and i9 against the field effect of the system 9. In the same manner, the space between the plates l0 and I5 may be screened ofl against the action of the system i8.
  • 23 is an annular electrode, which is conductively connected with the middle plates and serves the purpose of intercepting the electronic return current. [3 and 22 indicate symbolically the defleeting potential generators.
  • the supply of potential to this metallic coating preferably takes place by means of current-feeding brushes, which are secured to the system and rest firmly against the 5 coating. It is convenient, according to the invention," to employ two or more feed brushes.
  • Fig. 10 there is shown a connection system, which enables the middle plates of the systems to be imparted a positive potential as compared with 55 the primary anode, without necessity for employing a. special potential source.
  • 21 is a potentiometer
  • 26 and 28 are condensers
  • 24 and 25 the terminals of the anode current source.
  • the described three-plate systems may be employed for light-control purposes. Some devices designed for this purpose have been described above in connection with Figures 6 and '7. There will now be described modified forms of light controlling devices making use of three plate systems according to the invention.
  • the principle of these modified control arrangements according to the invention consists in that a part of the ray disposed between cathode and the scanning plates is displaced parallel to itself by means of a three-plate system and is controlled as regards its intensity, preferably by means of shuttering devices, at a point of the ray which is displaced parallel to the normal path of the ray (herein normal path means that particular path along which the ray would travel if no special means were provided), and is then re-deflected into the normal path by means of a further three-plate system constructed accord ing to the invention.
  • the shuttering device may be disposed within a special concentration field (for example, a cylinder having a negative potential in relation to the ray).
  • a special concentration field for example, a cylinder having a negative potential in relation to the ray.
  • the total control arrangement-preferably consisting of three elements: the system producing the first parallel displacement, the shuttering device preferably located in a concentration field, and the system (re-deflecting system) producing the second parallel displacement may conveniently be arranged in a single, for example tubular container which, in accordance with the invention, possesses both its ends as well as in the interior screening means, which screen or: the individual parts of the system against each other, and are provided with the smallest possible apertures for allowing the passage of the ray.
  • the light control system By assembling according to the invention the light control system to form a single structural element the technical construc tion of the tube is greatly simplified. Beyond this the light control arrangement according to the invention acts simultaneously as screening means, which withholds the direct cathode light from the luminous screen.
  • Figs. 12 and 13 show two forms of embodiment of a tube furnished with intensity control means of the last described type.
  • l is the Braun tube shown broken away (the anode, deflecting plates and image screen have been omitted for simplicitys sake), 2 the hollow reflector cathode, 3 the tube, for example metallic tube, forming the container for control device according to the invention, 4 and [the three-plate systems, l8 the shuttering device, and H the cylinder which produces the concentration field and possesses a suitable negative potential (for example, 200 5 volts) as compared with the ray, and which is insulated against the tube 8, and may be supported, for example, by a support 89.
  • the three-plate systems 4 and B consist of the two plates 8 and I or 0' and 'l' maintained on ray 10 (for example earth) potential and the middle plate 8 or '8'.
  • middle plates possess a wide outlet'aperture shown in dotted lines, and are supplied with a suitable positive bias (for example, 150-200 volts) as compared with the ray, which bias may be produced for example by means of the battery 22.
  • the shutter aperture may conveniently be given the form of an equilateral triangle, which is dimensioned and arranged in such fashion that the ray in the case of light control is able to pass through without touching, whilst upon a displacement to "dark a part of the ray is shuttered off by the two equal sides of the triangular aperture, and
  • the ray upon attaining complete darkness the ray is situated above the apex of the triangle, so that no electrons are able to pass through;
  • the height of the triangle may conveniently be selected at, say, twice the diameter of the ray.
  • the shutter aperture axially symmetrical, as the use of a phase reversing tube which is otherwise sometimes nec-v essary for obtaining a positive image may then be avoided.
  • a knife-edge as fine as possible which cuts out a larger or smaller portion of the ray in accordance with the position of the same may conveniently be employed in lieu of an apertured shutter.
  • the 50 shuttered (ineffective) portion of the ray may be distributed by cage-like surfaces, which are dispersed above the knife-edge and are maintained on ray (i. e., positive) potential, whereby the said shuttered portions of the ray may be neutralized whilst avoiding excessive heating of these surfaces.
  • the three-plate systems are screened off against each other and against the remaining parts of the system by means of the screening plates 9, l0, l5 and it, which are provided with 60 the ray passage apertures I2, ll, i3 and i4 and are insulated against the middle plates 8 or 8'.
  • 24 and 25 are the after-connected deflecting scanning plates, which conveniently may also be constructed as three-plate systems.
  • middle plate bias The extent of the requisite middle plate bias is dependent on both the sensitiveness of the three-plate system as well as the anode potential. It may be determined readily in each case by experiment. A bias of' 150-200 volts has been found particularly suitable for the systems set forth in their dimensions in the following, with an anode potential of about 2000 volts.
  • Fig. 1' The three-plate systems according to Fig. 1' may conveniently be dimensioned as follows:
  • Length of plates 15 mm.
  • the small spacing between the bent middle plate and the one outer plate may be set at 1 mm, and the spacing between the middle plate and the other outer plate at 2 mm.
  • both systems are completely symmetrical, and that the corresponding plates of the two systems are connected to the same potentials.
  • the control sensitiveness i. e., the extent of displacement of the ray from the adjustment "light to that of dark" decreases when increasing the length of the system.
  • the ray Due to the positive bias of the plate 8' the ray is here bent through the aperture of the plate into the space between the plates 8 and I, and leaves the space through the aperture M of the screening member l6. Since the systems 4 and 5 are so arranged that their electric field conditions are inversely equal and symmetrical (i. e., the spacing of the plates and the length of the plates is the same if the same potential is supplied to the two middle plates 8 and 8' and if the outer plates 6 and 1 and 6 and I are also given to the same potential) the ray leaves the system 5 along a path which represents an extension of the path of entry into the system 4.
  • the tube according to the invention may be furnished in the manner known per se with one or more anodes, for example in such fashion that one anode is located between the cathode and the light-control arrangement, and the second anode, preierably raised to a higher potential,
  • the arrangement according to the invention enables the graduation curve for the change-over from ligh to dark" to be varied as desired by simple variation in the form of the bounding curves of the shuttering device.
  • the arrangement further allows operations to be performed with relatively low anode potentials, and g5 ensures a reliable light control whilst avoiding any variation in the position of the image point.
  • a Braun tube comprising a gas-filled envelope enclosing a cathode and an anode mounted go in operative relationship thereto, a picture receiving screen, two main electrostatical deflecting systems each consisting of a pair of plates for deflecting the cathode ray in two directions perpendicular to each other, said main deflecting 35 systems being mounted between said cathode and said screen, and two auxiliary electrostatical deflecting systems for causing the ray to enter each of said main deflecting systems under a constant angle of inclination with respect to the plates L0 of the respective system, said auxiliary deflecting systems being mounted between said cathode and said main deflecting systems.
  • a Braun tube comprising an evacuated envelope, a gas-filling within said envelope, a cath- 15 ode and an anode mounted in operative relationship thereto for producing a cathode ray, means for concentrating the cathode ray, a picture receiving screen, two deflecting systems mounted between said anode and said screen, 50 each of said systems comprising two outer plates and one middle plate having a transverse slot, said middle plate being mounted in electrical relation symmetrically with respect to said two outer plates and being adapted to be supplied 55 with a constant positive bias with respect to each of the outer plates, one of said outer plates being adapted to be supplied with a constant potential, and the other of said outer plates being adapted to be supplied with a deflecting voltage, and means for connecting all of said electrodes to their respective circuits.
  • a Braun tube comprising an evacuated envelope, a gas-filling within said envelope, a cathode and an anode mounted in operative relationship 65 thereto for producing a cathode ray, means for concentrating the cathode ray, a picture receiving screen, two deflecting systems mounted between said anode and said screen, each of said systems comprising two outer plates and one 70 middle plate having a transverse slot, said middle plate being mounted in electrical relation symmetrically with respect to said two outer plates and being adapted to be supplied with a constant positive bias with respect to each of the outer 75 plates, one of said outer plates being adapted to be supplied with a constant potential, and the other one of said outer plates being adapted to be supplied with a deflecting voltage; an annular electrode mounted between said deflecting systems and said screen, a metallic coating mounted on the wall of said envelope in the vicinity of said annular electrode, means for connecting the middle plates of said deflecting systems with one another and with said'annular electrode, means for connecting those two outer.
  • a Braun tube comprising an envelope, a cathode and an anode mounted in operative relationship thereto for producing a cathode ray, means for controlling the intensity of the cathode ray, means for concentrating the ray, a picture receiving screen, two deflecting systems for deflecting the ray in two directions vertical to each other, each of said deflecting systems comprising two outer plates and a middle plate having a transverse slot, said middle plate being bent to angles and being mounted in electrical condition symmetrically with respect to said two outer plates, said middle plate being adapted to be supplied with a constant positive bias with respect to each of said outer plates, one of said outer plates being adapted to be supplied with a constant potential, the other one of said outer plates being adapted to be supplied with a deflecting voltage the maximum amplitude of which is smaller than said positive bias which the middlc plate is adapted to be supplied with.
  • a Braun tube comprising an evacuated envelope, a gas-fllling within said envelope, 2. cathode and an anode mounted in operative relationship thereto for producing a cathode ray, means for concentrating the cathode ray, a picture receiving screen, two deflecting systems mounted between said anode and said screen, each of said systems comprising two outer plates and one middle plate having a transverse slot, said middle plate being mounted in electrical relation symmetrically with respect to said two outer plates and being adapted to be supplied with a constant positive bias with respect to each of the outer plates, one of said outer plates being adapted to be supplied with a constant potential, and the other one of said outer plates being adapted to be supplied with a deflecting voltage, means for screening off the control plates of said deflecting systems against each other, and means for connecting all of said electrodes with their respective circuits.
  • a Braun tube comprising an evacuated envelope, a gas-filling within said envelope, a cathode and an anode mounted in operative relationship thereto for producing a cathode ray, means for concentrating the cathode ray, a picture receiving screen, two deflecting systems mounted between said anode and said screen, each of said systems comprising two outer plates and one middle plate having a transverse slot, said middle plate being arranged in electrical relation symmetrically with respect to said two outer plates and being adapted to be supplied with a constant positive bias with respect to each of the outer plates, one of said outer plates being adapted to be supplied with a constant potential, and the other one of said outer plates being adapted to be supplied with a deflecting voltage, each of said outer plates being shorter than said Iii!
  • the ratio between the length of one of said outer plates and its distance from said middle plate being equal to the ratio between the length of the other outer plate and its distance from the middle plate, the length of each plate being equal to the distance its edge from the middle of, the slot of the middle plate.
  • a Braun tube comprising an evacuated envelope, a gas-filling within said envelope, a cathode and an anode mounted in operative relationship thereto for producing a cathode ray, means for concentrating the cathode ray, a picture receiving screen, two deflecting systems mounted between said anode and said scr'een, each of said systems comprising two outer plates and one middle plate having a transverse slot, said middle plate being mounted in electrical relation symmetrically with respect to said two "outer plates and being adapted to be supplied with a constant positive bias with respect to each of the outer plates, one of said outer plates being adapted to be supplied with a constant potential, and the other one of said outer plates being adapted to be supplied with a deflecting voltage, the plates of the deflecting system mounted next to the screen having a trapezoidal basic shape and rounded bounding lines, the slot of the middle plate of said system having an arcuate profile.
  • a Braun tube having a deflecting system comprising two outer plates and a middle plate having a transverse slot, the middle plate being bent to angles and being mounted in electrical relation symmetrically to each of said outer plates, said middle plate being adapted to be supplied with a positive bias with respect to each oi! said outer plates, one oi said outer plates being adapted to be supplied with a constant potential, and the other one of said outer plates being adapted to be supplied with a deflecting voltage.
  • a Braun tube having a deflecting system comprising two outer plates and. one middle plate having a transverse slot, each of said outer plates being mounted in parallel to said middle plate and being considerably shorter than said middle plate, the ratio between the length of one of said outer plates and its distance from said middle plate being equal to the ratio between the length oi the other one of said outer plates and its distance from said middle plate, said middle plate being adapted to be connected with a constant positive bias with respect to each of said outer plates, one of said outer plates being adapted to be connected to a constant potential, the other one of said plates being adapted to be supplied with a deflecting voltage.
  • a Braun tube having a deflecting system comprising two outer plates and one middle plate having a transverse slot, each of said outer plates being about half as long as the middle plate, said middle plate being adapted to be supplied with a constant positive bias with respect to each of said outer plates, one of said outer plates being adapted to be connected to a constant potential, and the other one of said outer plates being adapted to be supplied with a deflecting voltage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Details Of Television Scanning (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
US694915A 1932-10-25 1933-10-23 Braun tube Expired - Lifetime US2083204A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE432209X 1932-10-25
DER87622D DE715380C (de) 1932-10-25 1933-03-30 Braunsche Roehre mit dreiteiligem Ablenkplattensystem
US717307A US2077271A (en) 1932-10-25 1934-03-26 Braun tube
US108950A US2188580A (en) 1932-10-25 1936-11-03 Cathode ray deflecting circuit

Publications (1)

Publication Number Publication Date
US2083204A true US2083204A (en) 1937-06-08

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US694915A Expired - Lifetime US2083204A (en) 1932-10-25 1933-10-23 Braun tube
US108950A Expired - Lifetime US2188580A (en) 1932-10-25 1936-11-03 Cathode ray deflecting circuit

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Application Number Title Priority Date Filing Date
US108950A Expired - Lifetime US2188580A (en) 1932-10-25 1936-11-03 Cathode ray deflecting circuit

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US (2) US2083204A (enrdf_load_html_response)
DE (1) DE715380C (enrdf_load_html_response)
FR (2) FR763894A (enrdf_load_html_response)
GB (2) GB432209A (enrdf_load_html_response)
NL (1) NL44767C (enrdf_load_html_response)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438709A (en) * 1942-08-06 1948-03-30 Hartford Nat Bank & Trust Co Thermionic tube having secondary electron emissive electrode with surface and form variations
US2489330A (en) * 1947-01-20 1949-11-29 Farnsworth Res Corp Neutralized cathode-ray deflection tube
US2837691A (en) * 1955-08-24 1958-06-03 Kaiser Ind Corp Electronic device
US2911557A (en) * 1956-08-23 1959-11-03 Gen Lab Associates Inc Analogue computer
US2921227A (en) * 1957-05-23 1960-01-12 Mackay Donald Maccrimmon Cathode ray tubes and apparatus utilizing such tubes
US20150204147A1 (en) * 2014-01-22 2015-07-23 Cameron Rig Solutions, Inc. Hydraulically deactivated clamp

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE923686C (de) * 1935-11-13 1955-02-21 Interessengemeinschaft Fuer Ru Ablenksysteme fuer Kathodenstrahl-Roehren
DE756688C (de) * 1937-09-18 1954-01-25 Aeg Braunsche Roehre, insbesondere fuer Mess- oder Fernsehzwecke, mit zwei oder mehr gegeneinander gedrehten Ablenkplattenpaaren
US2460142A (en) * 1945-01-30 1949-01-25 Gen Electric Electronic calibrating means for indicating instruments in pulse echo systems

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438709A (en) * 1942-08-06 1948-03-30 Hartford Nat Bank & Trust Co Thermionic tube having secondary electron emissive electrode with surface and form variations
US2489330A (en) * 1947-01-20 1949-11-29 Farnsworth Res Corp Neutralized cathode-ray deflection tube
US2837691A (en) * 1955-08-24 1958-06-03 Kaiser Ind Corp Electronic device
US2911557A (en) * 1956-08-23 1959-11-03 Gen Lab Associates Inc Analogue computer
US2921227A (en) * 1957-05-23 1960-01-12 Mackay Donald Maccrimmon Cathode ray tubes and apparatus utilizing such tubes
US20150204147A1 (en) * 2014-01-22 2015-07-23 Cameron Rig Solutions, Inc. Hydraulically deactivated clamp
US10400511B2 (en) * 2014-01-22 2019-09-03 Cameron Rig Solutions Llc Hydraulically deactivated clamp

Also Published As

Publication number Publication date
GB432209A (en) 1935-07-23
FR44618E (fr) 1935-03-19
NL44767C (enrdf_load_html_response)
DE715380C (de) 1941-12-22
US2188580A (en) 1940-01-30
FR763894A (fr) 1934-05-08
GB438882A (en) 1935-11-25

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