Abstract:
Disclosed is a cathode assembly of an electron gun for a color cathode ray tube in which a heater support structure is improved. The cathode assembly of an electron gun for a color cathode ray tube comprising three cylindrical sleeves which are arranged in an in-line type, a base metal which is located at the upper end of the sleeves, and of which the surfaces are coated with thermal electron emitting material, a heater which is located on the inner portion of each of the sleeves and having two parallel terminals which are exposed out of the sleeves, and a heater fixture block in which three pairs of welding terminals corresponding to the three heaters and two signal lines for forming an electrical circuit along with the welding terminals are provided in the lateral surface and two parallel bead glasses for supporting the sleeves and the block. The heater support structure is simple and the stability thereof is improved. Also, the heater is easily assembled to have a high productivity.
Abstract:
A cathode ray tube has an indirectly heated cathode structure including a base metal (3) having an electron emissive material coating (4) on an outer top surface thereof; a metal sleeve (2) having the base metal attached to an end of the metal sleeve; a heater (5) housed partly within the metal sleeve which includes a major heating portion (5f) formed of a spirally wound heating wire and leg portions (5g) formed of heating wires wound spirally in a plurality of layers; an insulating film (5b) covering the major heating portion and a portion of each of the leg portions continuous with the major heating portion; and a black coating film (5c) covering a portion of the insulating film extending from the major heating portion toward each of the leg portions, the whole of the black coating film being housed within the metal sleeve.
Abstract:
A cathode ray tube has an indirectly heated cathode structure including a base metal (3) having an electron emissive material coating (4) on an outer top surface thereof; a metal sleeve (2) having the base metal attached to an end of the metal sleeve; a heater (5) housed partly within the metal sleeve which includes a major heating portion (5f) formed of a spirally wound heating wire and leg portions (5g) formed of heating wires wound spirally in a plurality of layers; an insulating film (5b) covering the major heating portion and a portion of each of the leg portions continuous with the major heating portion; and a black coating film (5c) covering a portion of the insulating film extending from the major heating portion toward each of the leg portions, the whole of the black coating film being housed within the metal sleeve.
Abstract:
PROBLEM TO BE SOLVED: To improve uniformity of temperature distribution of a filament in a length direction with an outer diameter of a coil kept unchanged even if a diameter of the filament is changed. SOLUTION: A diameter di of the coil is gradually tapered down from the center part of a coil-like filament 10 to an end part in a length direction. On the other hand, an outer diameter D of the coil is constant along the length direction. As a means to taper down the diameter, only an inner coil face side of a wire material 12 has to be shaved. For making temperature distribution uniform in the length direction, it is preferable if a difference Δd between a wire diameter d max at the center part and that d min at the end part in the length direction satisfies the following formula. Δd/d max =0.041 to 0.145. COPYRIGHT: (C)2007,JPO&INPIT
Abstract translation:要解决的问题:为了提高长丝方向上的长丝的温度分布的均匀性,即使丝线的直径发生变化,线圈的外径保持不变。 解决方案:线圈的直径di从线圈状灯丝10的中心部向长度方向逐渐向下逐渐变细。 另一方面,线圈的外径D沿着长度方向是恒定的。 作为使直径逐渐变细的手段,只有线材12的内部线圈面侧必须被剃光。 为了使长度方向的温度分布一致,优选的是,中心部的线径d max SB>与端部的d min SB>的差Δd 长度方向满足下式。 Δd/ d max SB> = 0.041〜0.145。 版权所有(C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a filament assembly for use in an X-ray emitting device or other filament-containing devices. SOLUTION: An X-ray tube includes a vacuum enclosure that houses both a positive electrode having a target surface, and a negative electrode positioned with respect to the positive electrode. The negative electrode includes the filament assembly for emitting a beam of electrons during tube operation. The filament assembly comprises a heat sink and a plurality of filament segments. The plurality of filament segments are configured to simultaneously emit electron beams to be impinged on the target surface of the positive electrode, and are electrically connected in series. Each filament segment includes first and second end portions that are thermally connected to the heat sink, and a central portion having its work function modified to preferentially emit electrons. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PURPOSE: To obtain a heating type cathode ray tube of a structure for preventing a leakage current between a heater and the cathode. CONSTITUTION: In the heating type cathode ray structure for constituting an electron gun, the whole coating film of black color for coating a heating core of heater is disposed within a cathode sleeve.
Abstract:
A cathode ray tube has an indirectly heated cathode structure including a base metal (3) having an electron emissive material coating (4) on an outer top surface thereof; a metal sleeve (2) having the base metal attached to an end of the metal sleeve; a heater (5) housed partly within the metal sleeve which includes a major heating portion (5f) formed of a spirally wound heating wire and leg portions (5g) formed of heating wires wound spirally in a plurality of layers; an insulating film (5b) covering the major heating portion and a portion of each of the leg portions continuous with the major heating portion; and a black coating film (5c) covering a portion of the insulating film extending from the major heating portion toward each of the leg portions, the whole of the black coating film being housed within the metal sleeve.
Abstract:
A heater support for an electron gun of a cathode ray tube includes a plate-shaped insulator, a plurality of conductors alternately installed on one side of the insulator, a connection piece having a conductive connection piece, and at least a pair of fixing piece for fixedly supporting the connection piece, thereby precisely positioning the heater at the center of the cathode sleeve.