Abstract: A plate-type cathode ray tube device is disclosed in which a plurality of electron beams are emitted in directions parallel to a fluorescent screen, each of the electron beams is so deflected as to be perpendicular to the fluorescent screen, and performs a scanning operation in a direction parallel to the initial direction of the electron beam, a deflection voltage for deflecting each electron beam and for causing each electron beam to perform the above scanning operation is applied to one of a plurality of deflection plates which is juxtaposed in a direction parallel to the initial direction of the electron beam and each of which extends in a direction perpendicular to the initial direction of the electron beam, in such a manner that the deflection plates are successively applied with the deflection voltage, and a focusing correction voltage for keeping the size of electron beam spot formed on the fluorescent screen constant all over the fluorescent screen is applied to one of the deflection plates at the sa

Abstract: In an electromagnetic focusing electrostatic type image pick-up tube the electrostatic deflecting electrodes formed on the inner surface of the tube consist of 2 pairs of electrodes. Each of these electrostatic deflecting electrodes has a zig-zag shape from the electron gun towards the target. This zig-zag shape is twisted in the circumferential direction around the axis of the tube and variation rates of this twist amount are different, depending on the position in the axial direction.

Abstract: An electron gun for a color picture tube consists of a triode that generates a plurality of electron beams and a main lens which focuses and converges the electron beams. The main lens can be divided into two types, i.e., a pair of bi-potential focusing electron lenses and a combination of the bi-potential focusing electron lens and a uni-potential focusing electron lens. The electrodes constituting the main lens have apertures for permitting the transmission of a plurality of electron beams. The center axes of apertures are deviated toward the center axis of the embodiment of electron gun away from the axes of initial paths of the electron beams emitted from the triode.

Abstract: A cathode-ray tube comprises an electron beam generating section provided at one end of the tube, a target provided at the other end of the tube, and a group of electrodes provided on an inner wall of the tube for focusing and deflecting an electron beam. The electrode group includes first and second electrodes between the one and other ends of the tube in the mentioned order. The first electrode has a lead electrode portion for supplying an electric potential to the second electrode. The lead electrode portion extends along the tube axis with a zigzag form in which an angle .angle.MZN of a convave apex M and a convex apex N adjacent thereto spanning in a circumferential direction centering the tube axis Z is not smaller than 115.degree. or a spiral form which rotates centering the tube axis at a rotation angle not smaller than 420.degree..

Abstract: An electron gun for a color picture tube has beam generators for generating three electron beams and directing them toward the fluorescent screen along three paths which are parallel with each other on the same plane, and at least one pair of electrode surfaces each having three apertures centered with the three paths for forming independent main lenses so as to focus the electron beams on the fluorescent screen, the electrode surfaces being spaced apart from each other. Provided for the electrode surface are cylindrical shield members centered with the apertures and extending from the apertures in opposition to the opposing electrode surface. Outer ones of the cylindrical shield members have each an end surface inclined with respect to the center axis of the aperture so as to form inclined electric fields effective to converge the outer beams to one point to which the central beam converges.

Abstract: A magnetic-focus electrostatic-deflection image pickup tube utilizes a magnetic field for electron beam focusing and an electrostatic field for electron beam deflection. The magnetic field generated by a magnetic focus coil is distributed on the tube axis to have the peak of intensity which is offset toward the electron gun. The electron beam can be deflected and focused to provide a minimized beam spot with less distortion.

Abstract: A magnetic focusing and electrostatic deflecting image pickup tube comprises electrostatic deflection electrodes each constituted by a straight arrow pattern yoke composed of straight line segments arrayed in a linear zigzag pattern. The pattern yoke has a twist angle set at a value not greater than 105.degree.. An average value of angles formed by each upper apex and two lower apices adjacent to the upper apex of the zigzag pattern yoke with reference to the axis of the tube lies within a range of 116.degree. to 127.degree..

Abstract: A camera tube device for use in a television camera comprises an electron gun including a cathode electrode for emission of an electron beam, and first and second grid electrodes respectively having apertures for controlling the diameter of the electron beam. The aperture of the second grid electrode is sufficiently smaller than the aperture of the first grid electrode. The first grid electrode is applied with a positive voltage relative to the cathode electrode and the second grid electrode is applied with a positive voltage relative to the cathode electrode which is higher than that applied to the first grid electrode. The positive voltage applied to the first grid electrode has such a value that forms the electron beam having passed through the aperture of the first grid electrode into a laminar flow beam.

Abstract: An inline electron gun for color picture tube comprises a main lens including a plurality of electrodes spaced apart to each other and each of these electrodes has a pheripheral rim. Two of these peripheral rims oppose to each other and at least one of the peripheral rims has such an uneven shape that focusing force for the electron beams is increased.

Abstract: A magnetic focus and electrostatic deflection type image pick-up tube in which electrostatic deflection electrodes assuming a cylindrical shape as a whole are twisted about the axis of the cylinder at an angle selected so as to range from 21.degree. to 60.degree.. The spot of the electron beam is less enlarged in an oval shape at the corners of target in the imaging tube.

Abstract: A protein effective in stimulating cell growth activity. The protein has a molecular weight of from 5,000 to about 160,000, is composed predominantly of neutral and acidic amino acids, contains a significant amount of glutamic acid and aspartic acid, and is substantially free of nucleoside phosphotransferase. The protein is useful as wound treatment agent and as promoting agent in the synthesis of DNA. A method of producing the protein and compositions containing the same are also disclosed.

Abstract: An electron gun for a color picture tube is disclosed in which three parallel electron beams emitted toward a fluorescent screen and arranged so as to define one and the same plane are focused on the fluorescent screen by a main lens, electrodes constituting the main lens are spaced apart from each other, the electrodes include at least two envelopes and electrode plates disposed at the confronting end faces of the envelopes, each of the electrode plates has a single aperture for transmitting a central one of the electron beams, the path of each outer electron beam is surrounded partly by one of end portions of each electrode plate, and at least one of the electrode plates is placed in a corresponding one of the envelopes such that the electrode plate is recessed from the end face of the corresponding envelope confronting the other envelope.

Abstract: An electron gun used in a color picture tube having means for emitting three electron beams toward the fluorescent screen, and main lenses for focusing the electron beams on the fluorescent screen. The main lenses are constituted by two envelopes spaced out from each other and adapted to surround the electron beams, and two electrode plates located on the confronting end surfaces of the envelopes and provided with three apertures aligning on a line for conducting the three electron beams. At least one of the two electrode plates is recessed relative to another electrode plate and disposed inside the envelope, and the recessed electrode plate is structured such that non-rotational symmetry of the lens caused by the recess of the electrode is corrected.

Abstract: An electron beam focusing lens comprises at least two cylindrical electrodes one of which is to be applied with a high potential and the other of which is to be applied with a low potential. A plate electrode having an aperture at a central portion thereof is provided at an end face of the high-potential cylindrical electrode opposite to the low-potential cylindrical electrode. The plate electrode may be of a circularly curved shape which is projected toward the low-potential cylindrical electrode between the outer and inner circumference of the plate electrode.

Abstract: An electron gun for a television camera tube comprises a cathode for emission of electrons, a first grid disposed subsequently to the cathode and having a first aperture supplied with a positive voltage relative to the cathode, a second grid disposed subsequently to the first grid and having a second aperture supplied with a higher positive voltage than that supplied to the first grid, and an intermediate grid interposed between the first and second grids and having a hole. The intermediate grid forms a divergent electron lens near the first aperture between the first and second grids.

Abstract: An electron gun is disclosed which includes a thermionic cathode for emitting an electron beam, a grid having a first aperture for controlling the diameter of the electron beam, and an anode having a second aperture for catching a part of the electron beam having passed through the first aperture; and in which the diameter of the first aperture is smaller than or equal to the diameter of the second aperture, and the grid and the anode are applied with positive potentials relative to a cathode potential, for example, with a voltage of 5 to tens of volts and a voltage of 100 to 500 volts, respectively, to form a uniform axial field between the grid and the anode, thereby generating a laminar flow electron beam having a constant current density.

Abstract: A television camera tube with electrostatic focusing comprising a triode section at the first stage having a cathode a first grid and a second grid, an electrostatic focusing lens section at the next stage having a third, fourth and fifth grids of cylindrical electrode configuration, and a sixth grid with mesh electrode configuration at the last stage, these electrodes being coaxially arranged in a cylindrical glass envelope, the length of the fourth grid is greater than 1.15 times the inner diameter thereof but equal to or smaller than 2.30 times the inner diameter thereof.

Abstract: A vidicon type camera tube comprising a beam current control section including a thermionic cathode, a first grid having an aperture of diameter d.sub.1, a second grid having an aperture of diameter d.sub.2 and a beam disc having a diaphragm of diameter d.sub.3 disposed at a distance of l along the tube axis from the second grid. The tube further comprises a main lens section constituted of cylindrical electrodes. The diameters d.sub.1, d.sub.2 and d.sub.3 and the distance l are so determined that the value of (d.sub.2 /l)(d.sub.3 /d.sub.1).sup.2 may lie in the range where the difference of the effective cathode loading is positive.

Abstract: A television camera tube with electrostatic focusing and magnetic deflection comprises in an cylindrical envelope a beam current control, a main lens section and a sixth grid in the form of a mesh electrode. The beam current control section includes a cathode, a first grid and a second grid with an electron beam limiting diaphragm in this order. The main lens section includes third, fourth and fifth grids in the form of cylindrical electrodes disposed in this order. Around the cylindrical envelope is mounted a magnetic deflection coil whose length along the envelope axis is 0.18 to 0.40 times the distance from the beam limiting diaphragm to the mesh electrode.

Abstract: In an electron gun for cathode-ray tube comprising a lens system constructed by four cylindrical electrodes concentrically arranged apart from each other for focusing electron beams emitted from a cathode, these electrodes are applied with proper voltages so as to form a bipotential type focusing lens and a unipotential type focusing lens. Preferably, the length of the electrode in the unipotential type focusing lens lying at the cathode side is selected to be larger than a half of the inner diameter of the electrode.