Abstract: An oil level gauge is provided. The gauge includes a gauge plate that is coupled to a knob. The gauge plate has a mark isolation body, a level mark body, and a gauge end body, which are connected from a gauge fixture body. The mark isolation body and the gauge end body have a phase difference by a two-stage twisted section for the level mark body having L (LOW) and F (FULL) marks indicative of an oil capacity. Accordingly, the visibility of the level mark body is maintained clean by preventing the L (LOW)/F (FULL) mark of the level mark body from being contaminated with wall surface oil when the gauge plate is pulled out from a gauge channel path of an engine.

Abstract: The present invention relates to a cathode ray tube having a glass structure which minimizes a stress according to a cathode ray tube of slim type, having a panel with a phosphor screen formed on the inner surface thereof. A funnel, which is joined to the panel, has a body portion, a yoke portion and a neck portion, and a thickness projection is provided in the body portion of the funnel between a seal line plane and the neck portion of the funnel.

Abstract: The present invention relates to a color cathode ray tube and more specifically to a color cathode ray tube in which mechanical stress due to internal pressure made by evacuation is decreased. According to an aspect of the present invention, a cathode ray tube comprises a panel on inner surface of which a phosphor screen is formed; a funnel joined to the panel; an electron gun generating electron beams; and a deflection yoke which is mounted within the funnel to deflect the electron beams, wherein radius of curvature of outer surface of said panel is in the range of 5000 mm to 100000 mm, and said panel satisfies: 1.0?(OAH*CFT)/USD?1.5 wherein OAH is overall height of said panel measured along defrection axis X, USD is diagonal length of effective screen of said panel and CFT is thickness of center portion of said panel.

Abstract: A cathode ray tube includes a panel, a funnel and a funnel yoke portion having a non-circular-shaped vertical section. When a diagonal portion thickness on a certain vertical section between a reference line and a neck line is Td and a long side portion thickness at the same vertical section is Th, a glass structure of a cathode ray tube satisfies 0.5<Th/Td<1.01. When a diagonal portion thickness at a top round is Dt?, a long side portion thickness is DS?, a short side portion thickness is DL?, a diagonal portion thickness at a reference line is Dt, a long side portion thickness is DS, and a short side portion thickness is DL, then the glass structure of a cathode ray tube satisfies 1.3?Dt?/Dt<1.80.

Abstract: A color CRT comprising a panel having a substantially flat outer surface and an inner surface having a certain curvature, and a mask having a plurality of electron beam passing holes, wherein an effective surface diagonal size of the panel is not greater than about 534 mm, wherein a central portion transmittance rate is within the range of about 45–75%, wherein the panel satisfies the condition 1.1?(Rxs/Ryc)?4.6, wherein Rxs is defined as an inner curvature radius along an edge of a longer side of the panel, and wherein Ryc is defined as an inner curvature radius along a line in the center of the panel parallel to the shorter side of the panel.

Abstract: A color cathode ray tube including: a panel having a substantially flat outer surface and an inner surface having a curvature; a funnel coupled to the panel; a deflection yoke installed at an outer surface of the funnel; and a reinforcing band installed at a skirt portion of the panel, wherein the panel and the funnel satisfy the following condition, U/U??2.5, when a diagonal size of an effective surface of the panel is U, and a tube axis directional distance from an outer surface center of the panel to a boundary portion (TOR) between a body part and a yoke part of the funnel is U?, so that in the color cathode ray tube of the present invention, a lightness and slimness of a panel can be accomplished, and in order to compensate the weak structural strength caused in this case, a reinforcing band position (h) is set in the range of 10.5 mm˜20 mm to implement an optimum tensile force.

Abstract: Disclosed herein is a color cathode ray tube which optimizes the structure of a glass panel and funnel to achieve weight reduction thereof. In the color cathode ray tube, a curvature radius of an outer surface of the panel is in a range of 5000 mm to 100000 mm, and the panel is configured to satisfy an expression: 1.0?(OAH*CFT)/USD?1.5, where, OAH is a distance from the outer surface of the panel to a sealing surface between the panel and the funnel, USD is a diagonal length of an effective screen of the panel, and CFT is a thickness of a central region of the panel. The cathode ray tube of the present invention has the effects of reducing manufacturing costs through weight reduction thereof, of lowering the degree of breakage during a heat treatment step included in a manufacturing process of the cathode ray tube, resulting in an improved yield, and of effectively intercepting X-rays generated during operation thereof.

Abstract: A color cathode ray tube is disclosed. A color cathode ray tube including: a panel having a substantially flat outer surface and an inner surface having a curvature; a funnel coupled to the panel; a deflection yoke installed at an outer surface of the funnel; and a reinforcing band installed at a skirt portion of the panel, wherein the panel and the funnel satisfy the following condition, U/U??2.5, when a diagonal size of an effective surface of the panel is U, and a tube axis directional distance from an outer surface center of the panel to a boundary portion (TOR) between a body part and a yoke part of the funnel is U?, so that In the color cathode ray tube of the present invention, a lightness and slimness of a panel can be accomplished, and in order to compensate the weak structural strength caused in this case, a reinforcing band position (h) is set in the range of 10.5 mm˜20 mm to implement an optimum tensile force.

Abstract: In a color cathode ray tube, by optimizing an outer radios of curvature, an inner radius of curvature on a corner portion, a thickness of a long side, a thickness of a short side, a thickness of the corner portion, the total length of the panel, the total length of the funnel body and the total length of a yoke portion of the funnel determining a section shape of the yoke portion of the funnel, a stress concentrated on the yoke portion can be lowered. In addition, according to the increase of an inner radius of curvature of the corner portion of the yoke portion, a crash phenomenon of an electron beam is decreased, and an impact resistance and productivity improvement in fabrication process can be secured by lowering a high stress occurrence on the funnel in vacuum.

Abstract: A cathode ray tube includes a panel, a funnel and a funnel yoke portion having a non-circular-shaped vertical section. When a diagonal portion thickness on a certain vertical section between a reference line and a neck line is Td and a long side portion thickness at the same vertical section is Th, a glass structure of a cathode ray tube satisfies 0.5<Th/Td<1.01. When a diagonal portion thickness at a top round is Dt?, a long side portion thickness is DS?, a short side portion thickness is DL?, a diagonal portion thickness at a reference line is Dt, a long side portion thickness is DS, and a short side portion thickness is DL, then the glass structure of a cathode ray tube satisfies 1.3?Dt?/Dt<1.80.

Abstract: A color CRT comprising a panel having a substantially flat outer surface and an inner surface having a certain curvature, and a mask having a plurality of electron beam passing holes, wherein an effective surface diagonal size of the panel is not greater than about 534 mm, wherein a central portion transmittance rate is within the range of about 45-75%, wherein the panel satisfies the condition 1.1≦(Rxs/Ryc)≦4.6, wherein Rxs is defined as an inner curvature radius along an edge of a longer side of the panel, and wherein Ryc is defined as an inner curvature radius along a line in the center of the panel parallel to the shorter side of the panel.

Abstract: The present invention relates to a cathode ray tube and more specifically to a cathode ray tube having a glass structure which minimize a stress according to a cathode ray tube of slim type.

Abstract: The present invention relates to a color cathode ray tube having a spring structure capable of compensating for the displacement of a shadow mask frame, thereby suppressing the degradation of the color purity according to the mislanding of electron beams. The spring according to the present invention includes a stud pin coupling part, a frame welding part and an inclined part as an elastic support body having a predetermined inclination angle between the stud pin coupling part and the frame welding part. Further, the spring is bonded to a plurality of metal members that have different thermal expansion coefficients, while being separated from each other in a length direction of the spring relative to a tube shaft.

Abstract: A panel for a flat screen type CRT includes an internal curvature portion wherein a screen effective surface is formed, and a skirt portion extended rearwardly from an edge of the internal curvature portion. Where Rs is the radius of curvature at an inner side of a corner of a seal edge portion in the skirt portion and Rx, Ry, and Rd are respectively the radii of blend curvature of a long-side portion, a short-side portion and a corner portion in a part where the internal curvature portion and skirt portion meet, the relations 0.4<Rd/Rs<0.6, 1≦Rx/Rd≦4, and 1≦Ry/Rd≦2 are satisfied, whereby the size of the screen effective surface area can be increased compared to that of a CRT of the same size.

Abstract: In a vacuumized cathode ray tube consisting of a panel and a funnel and including a funnel yoke portion having a non-circular-shaped vertical section, when a diagonal portion thickness on a certain vertical section between a reference line and a neck line is Td and a long side portion thickness at the same vertical section is Th, a glass structure of a cathode ray tube satisfies 0.5<Th /Td<1.01, when a diagonal portion thickness at a top of round is Dt′, a long side portion thickness is DS′, a short side portion thickness is DL′; a diagonal portion thickness at a reference line is Dt, a long side portion thickness is DS, a short side portion thickness is DL; a glass structure of a cathode ray tube satisfies 1.3≦Dt′/Dt<1.80. Accordingly, because a deflection efficiency and a BSN margin can be simultaneously improved, it is possible to slim down a cathode ray tube, reduce a power consumption thereof and improve a quality and a productivity thereof.

Abstract: In a color cathode ray tube, by optimizing an outer radios of curvature, an inner radius of curvature on a corner portion, a thickness of a long side, a thickness of a short side, a thickness of the corner portion, the total length of the panel, the total length of the funnel body and the total length of a yoke portion of the funnel determining a section shape of the yoke portion of the funnel, a stress concentrated on the yoke portion can be lowered. In addition, according to the increase of an inner radius of curvature of the corner portion of the yoke portion, a crash phenomenon of an electron beam is decreased, and an impact resistance and productivity improvement in fabrication process can be secured by lowering a high stress occurrence on the funnel in vacuum.

Abstract: A panel for a flat screen type CRT includes an internal curvature portion wherein a screen effective surface is formed, and a skirt portion extended rearwardly from an edge of the internal curvature portion. Where Rs is the radius of curvature at an inner side of a corner of a seal edge portion in the skirt portion and Rx, Ry, and Rd are respectively the radii of blend curvature of a long-side portion, a short-side portion and a corner portion in a part where the internal curvature portion and skirt portion meet, the relations 0.4<Rd/Rs<0.6, 1≦Rx/Rd≦4, and 1≦Ry/Rd≦2 are satisfied, whereby the size of the screen effective surface area can be increased compared to that of a CRT of the same size.

Abstract: The present invention relates to a color cathode ray tube having a spring structure capable of compensating for the displacement of a shadow mask frame, thereby suppressing the degradation of the color purity according to the mislanding of electron beams. The spring according to the present invention includes a stud pin coupling part, a frame welding part and an inclined part as an elastic support body having a predetermined inclination angle between the stud pin coupling part and the frame welding part. Further, the spring is bonded to a plurality of metal members that have different thermal expansion coefficients, while being separated from each other in a length direction of the spring relative to a tube shaft.