Abstract: To realize a high-quality flat-face type of color cathode ray tube by combining a tint panel with a pressed mask, the outer surface of the panel of the color cathode ray tube is made nearly flat and the inner surface of the panel is curved in a concave shape, and the long-length direction pitch of slots formed in an aperture region 2 of a pressed mask 1 to be disposed close to the inner surface and the connection-direction width of each of bridges which connect the slots are made different between a central portion (A) and a peripheral portion (B) in the apertured region 2 of the pressed mask 1, whereby the ratio of bridges per unit area is made larger in the central portion (A) than in the peripheral portion (B) or the opening rate of slots per unit area is made larger in the peripheral portion (B) than in the central portion (A).

Abstract: A color selecting apparatus for a cathode-ray tube including a frame, and a mask supported in the frame with tension along a minor axis, where the mask having a rectangular hole part formed with a plurality of electron beam-passing apertures, a non-hole part surrounding the hole part, and a pair of vibration attenuating members attached at both ends of the surface of the non-hole part, facing each other along a major axis, for attenuating vibration waves which transmit along the major axis. The vibration attenuating members are made of a metal having a greater mass than the non-hole part, and attached by spot-welding so that they are away from the non-hole part by a predetermined gap at every portion except the welding points. Therefore, the vibration attenuating members serve as a damper to attenuate vibrations which transmit in the major direction, particularly vibrations generated by the speakers.

Abstract: A holder 30 supporting a mask frame 13 is formed by bending an elongated, substantially rectangular metal plate in opposite directions along first and second bending lines 33a and 33b, such that the holder has an engagement portion 35 engaged with a corresponding stud pin, a fixed portion 34, and a slope portion 36 extending and inclined between the engagement portion and the fixed portion. When the mask frame has thermally expanded, the holder moves the mask frame toward a phosphor screen along the center axis of a face panel. The fixed portion 34 has a projection 40 projecting from the vicinity of an acute-angle portion 50 which is defined by a side edge of the fixed portion and the first bending line. The fixed portion is fixed to the mask frame in the vicinity of the first bending line by welding at least a part of the projection to the mask frame.

Abstract: This invention intends to provide an aperture grill supporting frame whereby forces exerted by damper wires on individual thin tapes constituting an aperture grill are uniform.

Abstract: The present invention relates to a support frame for a cathode-ray tube which is capable of preventing damage of a corner portion of a support frame circumference in forming of the support frame. The support frame for supporting a shadow mask of a cathode-ray tube in accordance with the present invention comprises notches formed on a certain portion of an upper surface of the corner portion of the support frame circumference, in more detail on the longer side and shorter side of the support frame circumference.

Abstract: A color cathode ray tube comprises a vacuum envelope in which there is mounted a shadow mask having a curved surface having a plurality of electron beam passing holes and a skirt extending downward from the margin of the curved surface. The shadow mask is supported by a mask frame having a substantially rectangular side wall. A shadow mask assembly constituted by fitting and securing the skirt into the side wall is set in the panel of the envelope, and the skirt is fitted and secured into the side wall by curving the middles of two or four facing sides of the skirt inward. Thereby, it is possible to provide a color cathode ray tube having the shadow mask assembly capable of obtaining a superior magnetic shielding characteristic by enlarging the effective region of the curved surface of the shadow mask.

Abstract: A tension mask frame assembly for a color cathode-ray tube includes a frame including first and second support members, and at least a pair of elastic members supporting the first and second support members, both end portions of each of the elastic members are secured to the first and second support members, a tension mask including a plurality of strips and forming slits, a plurality of tie bars disposed between the strips and connecting neighboring strips to divide slits, where longer side portions perpendicular to a lengthwise direction of the strips are secured to the first and second support members, and vibration prevention members having both end portions supported at the first and second support members, having a predetermined tensile force, and being in contact with shorter side portions of the tension mask in a direction parallel to the strips of the tension mask.

Abstract: Structure for supporting a shadow mask in a color cathode ray tube including main frames each extended along a long side having the shadow mask welded thereto directly, subframes each extended along a short side connected to the main frames for supporting the main frame, plate type supporting members each fitted to a position of an outer surface of respective frames, and elastic members having one side coupled to a stud pin on an inside surface of the panel, and the other side fitted to the supporting member, wherein the supporting member of the subframe includes a first and a second flanges opposite to each other extended downward vertically, and a parallel part extended horizontally between the first and second flanges, thereby maintaining a uniformity of welding quality during cathode ray tube fabrication and preventing color distortion during operation of the cathode ray tube.

Abstract: A color cathode ray tube including a generally rectangular shadow mask with at least a long side, a short side and a corner, and having a curved apertured portion with a multiplicity of electron-transmissive apertures, a curved imperforate portion surrounding and integral with the apertured portion and a skirt portion bent back from a periphery of the curved imperforate portion. A generally rectangular support frame is provided for suspending the shadow mask by spot welding the skirt portion thereto within a panel portion of the color cathode ray tube. The skirt portion is provided with a plurality of slits extending in a direction of a height of the skirt portion and a plurality of embossments extending in the direction of the height of the skirt portion in one of a long side and a short side of the skirt portion.

Abstract: The present invention provides an improvement in a color picture tube having a tension mask supported by a support frame mounted within the tube. The mask includes an active apertured portion formed by a plurality of parallel vertically extending strands, between which are elongated operational apertures through which electron beams pass during operation of the tube. Top and bottom border portions, outside the active apertured portion of the mask, have additional apertures therein that are aligned with the longitudinal centerlines of the strands.

Abstract: A color cathode ray tube including a shadow mask assembly and an inner shield provided for the shadow mask assembly which are disposed within the tube. The shadow mask assembly includes a substantially rectangular shadow mask, a substantially rectangular mask frame, and a spring for mounting the shadow mask assembly in the panel of the cathode ray tube. The shadow mask has a curved surface having electron beam passing holes and a skirt folded from the margin of the curved surface and extending in a tube axis direction. At least one of the major and minor sides of the substantially rectangular shadow mask has a curvature convex to the tube axis with corners thereof being round and at least one of the major and minor sides of the substantially rectangular mask frame is linear or has a curvature concave to the tube axis with corners thereof being round.

Abstract: A shadow mask structure to which this invention is applicable comprises a mask frame and a shadow mask. The mask frame is provided with a frame plate and a pair of major sidewalls perpendicularly risen from a pair of major sides of the frame plate. The shadow mask is spanned between top edges of the major sidewalls so as to be tensioned. The shadow mask has an aperture area and a no-aperture area. The no-aperture area is extended on a peripheral region. The shadow mask has a pair of half-etched dent areas formed on the no-aperture area along the pair of minor sides of the shadow mask. The half-etched dent areas have a large number dents.

Abstract: A substantially rectangular shadow mask is arranged opposite to a phosphor screen formed on an inner surface of a panel. The shadow mask has a mask body and a mask frame to which a peripheral portion of the mask body is attached. The shadow mask has a rectangular form having a center through which a tube axis passes, and a long axis and a short axis passing through the center and perpendicular to each other. The mask frame has a pair of long side walls extending parallel to the long axis and a pair of short side walls extending parallel to the short axis. The height of each long side wall at a central portion along the tube axis is lower than the height of each short side wall at a central portion along the tube axis.

Abstract: A shadow mask assembly includes a mask frame and a shadow mask supported by the mask frame for extension. The mask frame is of a rectangular shape having a pair of longer side members and a pair of shorter side members. Both the edges of the shadow mask is bonded onto the longer side members while the shorter side members are bent by an external force within the elasticity thereof. After the external force is removed, the shorter side members are slightly deformed within the elasticity thereof whereas the deformation of the longer side members is substantially removed. Suitable tension can be applied to the shadow mask in a wider temperature range.

Abstract: Resistance to deformation of a support spring for the mask-frame assembly of a cathode ray tube is improved by adding strengthening ribs running longitudinally along the edges of the body and partially into the base of the spring.

Abstract: A color CRT suppresses deformation of the main shadow mask surface after fastening the shadow mask to the mask frame. Numerous substantially rectangular grooves or substantially circular recesses are formed in the damper part disposed to the shadow mask skirt so that the bending strength in the circumference direction of the skirt is greater than the bending strength in the direction parallel to the tube axis.

Abstract: Mask in a color cathode ray tube, including electron beam pass through holes with bridges connected to non-hole portions between the beam pass through holes in a width direction, wherein a thickness of the bridge of the mask facing an electron gun is formed thinner than other portions of the mask, thereby attenuating howling and enhancing a luminance.

Abstract: Color cathode ray tube including a panel in front portion of the cathode ray tube, and a shadow mask spaced from, and fitted to rear of the panel for selecting a color from electron beams, wherein at least one of an inside surface of the panel and the shadow mask have a curvature structure in which a radius of curvature varies continuously within a fixed ratio range, thereby enhancing a strength and improving howling.

Abstract: A color cathode ray tube includes an evacuated envelope having a panel portion, a neck portion, and a funnel portion for connecting the panel portion and the neck portion, a generally rectangular shadow mask having a curved apertured portion having a multiplicity of electron-transmissive apertures, a curved imperforate portion surrounding and integral with the apertured portion and a peripheral skirt portion, a generally rectangular support frame for suspending the shadow mask by spot welding the peripheral skirt portion thereto, within said panel portion, a phosphor screen formed on an inner surface of the panel portion, an electron gun housed in the neck portion, and a deflection yoke.

Abstract: A stretched mask having a high tensile strength and favorable high-temperature creep properties and free from tape twist, and a material for the stretched mask. A low-carbon steel sheet containing 70 ppm to 170 ppm of nitrogen on a weight basis is heat-treated at a temperature at which recrystallization does not take place. The heat-treated material is provided with a resist pattern for forming apertures and subjected to etching to form apertures.

Abstract: A color cathode ray tube includes a generally rectangular shadow mask having a curved apertured portion having a multiplicity of electron-transmissive apertures, a curved imperforate portion surrounding and integral with the apertured portion and a skirt portion bent back from a periphery of the curved imperforate portion, and a generally rectangular support frame for suspending the shadow mask by spot welding the skirt portion thereto, within a panel portion of the color cathode ray tube. The skirt portion is provided with plural embossments extending in a direction of a height of the skirt portion, and the embossments are distributed over each of central portions extending a distance PHL and a distance PVL in long and short sides of the skirt portion, respectively, PHL and PVL satisfying following inequalities: 0.5 HL≦PHL≦0.85 HL, 0.5 VL≦PVL≦0.

Abstract: A shadow mask frame assembly of a flat cathode ray tube (CRT) includes a shadow mask including a plurality of strips formed at a main body in a vertical direction by being separated a predetermined distance by slits and a plurality of bridges forming slots by connecting neighboring strips and sectioning the slits, in which the slots include a first slot group including slots having a wide interval between the bridges and a second slot group including slots having a narrow interval between the bridges, first and second support members secured at a long side portion of the shadow mask, and a frame including first and second elastic members, either end portion of each of which is secured to each of the first and second support members, for applying a tension force to the shadow mask.

Abstract: A color picture tube has a tensioned mask supported by a support frame mounted within said tube. The mask has a significantly lower coeffiecient of thermal expansion than the frame. Intermediary members are located between the mask and the frame. The intermediary members are of a material similar to that of the mask. Each of the members is attached to the frame at a single location and the mask is attached to edges of the intermediary members. Further included are guides for holding the intermediary members to the frame while permitting expansion of the frame relative to the intermediary members.

Abstract: A vacuum envelope of a cathode ray tube comprises a faceplate and a rear envelope bonded to the faceplate. The rear envelope includes a rear plate opposed to the faceplate, a side wall, a plurality of funnels extending from the rear plate, partition walls set up on the rear plate, and necks bonded individually to the funnels. The rear envelope is formed by connecting a plurality of miniature envelopes to one another. Each miniature envelope includes at least one funnel, and is molded by pressing.

Abstract: A mask assembly for a cathode ray tube includes a shadow mask for permitting electron beam to strike phosphor elements associated with the beam, a frame for supporting the shadow mask, and an electron beam interceptor which selectively passes electron beam and is mounted on the frame and between the shadow mask and an electron gun of the cathode ray tube. The electron beam interceptor is a metal sheet and includes a blocking mask on which a plurality of apertures are formed at the positions which correspond to the apertures of the shadow mask, and one or more supporter whose ends are adhered at the frame and the blocking mask to support the blocking mask in a funnel of the CRT.

Abstract: A color cathode ray tube, having a panel portion including a shadow mask structure, a neck portion housing an electron gun and a funnel portion connecting the panel portion and neck portion. The shadow mask structure having a plurality of electron beam passing holes, a substantially rectangular support frame for holding the shadow mask, and at least three of mask springs which are fixed outside wall of side of the substantially rectangular support frame. The mask springs have holding hole to the panel pins, respectively, the portion of the holding hole of the mask spring shift from the fixed portion on outside wall of said rectangular support frame. The mask spring has a value of coefficient of thermal expansion which is from 1.2 to 2.0 times as great as the coefficient of thermal expansion of the support frame.

Abstract: A color cathode-ray tube includes a panel portion, a neck portion, a funnel portion connecting the panel and neck portions, a fluorescent layer formed on an inner surface of a face plate of the panel portion, a shadow mask disposed opposite to the fluorescent layer, an electron gun housed in the neck portion, and an internal magnetic shield disposed in the funnel portion. The internal magnetic shield is formed in a substantially quadrangular pyramid-shape having a substantially rectangular first opening with a smaller diagonal dimension at one end adjacent to the electron gun and a substantially rectangular second opening with a larger diagonal dimension than the smaller diagonal dimension at the other end adjacent to the shadow mask.

Abstract: A color picture tube has a tensioned mask supported by a support frame mounted within the tube. The mask has a significantly lower coefficient of thermal expansion than the frame. The mask has an active apertured portion formed by a plurality of parallel vertically extending strands, through which electron beams pass during operation of the tube, and two opposite side border portions outside the active apertured portion. The two opposite side border portions have tie bars that extend between the vertical strands of the mask. The tie bars accommodate expansion of the frame, while substantially maintaining the positions of the vertical strands in the active portion of the mask.

Abstract: A shadow mask is arranged to face an inner surface of a substantially rectangular face panel. The shadow mask has a substantially rectangular mask body which has a number of apertures for passing an electron beam, and a rectangular mask frame which supports a peripheral edge portion of the mask body. The mask body is curved in a short axis direction, and is fixed to the mask frame in a state that an internal stress of a direction making small a radius of curvature of the short axis direction is applied.

Abstract: A cathode-ray tube having a flat face including a panel having a flat screen surface and provided with a support portion at the inner surfaces of a skirt portion at the periphery thereof, a frame supported by the support portion of the panel, a flat tension mask fixed to the frame in a tensioned state, and a funnel joined to the panel for end thereof to support the frame.

Abstract: In order to prevent doming effect in a shadow mask of a color cathode ray tube caused by thermal expansion of the shadow mask structure produced by heating of the shadow mask due to impingement of the electron beam thereon, the shadow mask is provided with a skirt portion along at least one side thereof. The skirt portion includes a long projection portion where the shadow mask is welded to the frame, an adjacent inclined portion which decreases in length in a direction away from the projection portion. Further, a short portion is disposed therebetween the inclined portion. The inclined portion decreases in length linearly or non-linearly.

Abstract: The present invention relates to a cathode ray tube having an inner magnetic shield and to a method for fixing the inner magnetic shield. The inner magnetic shield is fixed to a frame supporting a shadow mask simply with fixing members. First engagement holes are provided on each side of a first flange portion of the frame, and second engagement holes are provided on each side of a second flange portion of the inner magnetic shield. Each side of the second engagement hole is provided with a folding portion. The fixing member is inserted so as to put into the first engagement hole and the second engagement hole facing the first engagement hole from the side of the inner magnetic shield.

Abstract: A shadow mask is provided in an envelope of a color cathode ray tube. The shadow mask includes a mask body having a number of electron beam apertures, and a mask frame having side walls equipped on the peripheral portion of the mask body. The side walls of the mask frame includes a pair of long side walls extending in parallel with the long axis X and a pair of short side walls extending in parallel with the short axis Y. Beads and are respectively formed on the long side walls and the short side walls. The length of each bead of the long side wall along the long axis is set in a range of 55% to 80% of the length of the long side walls along the long axis, and a width of the bead in the tube axis direction is set in a rage of 40% to 75% of the maximum width of the long side walls in the tube axis direction.

Abstract: A corner spring for color CRT includes a first arm where a coupling hole is formed to mate with a stud pin inside the panel, a second arm coupled with an outer face of the frame for supporting the shadow mask, and a welding portion where the first and second arms are welded to each other. The length(L) of movable piece that is from the welding portion to bent portion of the first arm, is represented as 1.08S≦L≦1.75S to the distance (S) from a center of spring hole in a stud pin coupling portion of the first arm to a frame contacting portion of the second arm. The distance (H) between a central axis of the welding portion and the frame welding portion of the second arm is expressed as H≦0.668S.

Abstract: In a color cathode ray tube comprising a panel with a substantially rectangular effective portion whose outside face is almost flat or slightly curved and whose inside face has a curvature in the direction of minor axis near the short sides of the portion, and a fluorescent substance screen having a substantially rectangular effective region formed on the inside face of the effective portion of the panel, the short sides in the outer circumference of the effective region of the fluorescent substance screen are projected toward the center of the effective region. This improves the flatness of images appearing on the fluorescent substance screen provided on the inside face of the effective portion in the color cathode ray tube with the outside face of the effective portion of the substantially rectangular panel being almost flat and the inside face having a curvature in the direction of minor axis at least near the short sides.

Abstract: A high thermal expansion member consisting substantially of Fe—Ni—Cr based alloy, a low thermal expansion member consisting substantially of an Fe—Ni based alloy, and an intermediary member, which comprises one kind of metal selected from Fe, Al and Cu or an alloy comprising these metals, possesses a thermal expansion coefficient &agr;3 which has a value between those of the high thermal expansion member (thermal expansion coefficient &agr;1) and the low thermal expansion member (thermal expansion coefficient &agr;2) (&agr;1>&agr;3>&agr;2), and is interposed therebetween, are laminated to form a thermal deformation member for an electron tube or a thermal deformation member for electric control. The intermediary member, without adversely affecting strength or long term reliability of the thermal deformation member, contributes to manufacturing cost reductions and improvement of workability.

Abstract: This invention intends to provide an aperture grill supporting frame whereby forces exerted by damper wires on individual thin tapes constituting an aperture grill are uniform. This object is achieved by the following: the surfaces for welding of upper and lower frames of an aperture grill supporting frame are so processed from the beginning as to have sizes compensatory for deformations occurring as a result of pressurization and thus they will form a part of a columnar wall surface with a radius of R when they subject to deformations in the presence of a pressure. Thus, the surfaces for welding at both ends, for example, take a slightly bulged form as compared with a sector of a radius of R before they are subject to welding.

Abstract: A shadow mask opposing a phosphor screen includes a substantially rectangular mask body having a number of electron beam passage apertures, and a substantially rectangular mask frame having four side walls supporting a periphery of the mask body. Among the side walls, a pair of long side walls each has a central connecting portion which is located at a central portion thereof in lengthwise direction and fixed to the mask body, and a pair of protruding portions which are provided on both sides of the central connecting portion in the lengthwise direction and protrude in a direction apart from the mask body. Each protruding portion defines a gap between the side wall and the mask body, and a width of the gap gradually increases as it goes far from the central connecting portion.

Abstract: A cathode-ray tube has an internal magnetic shield and at least one contact spring attached to the shield. The shield includes a land with an outer edge and an inner edge. The spring includes two portions, an improved clasp portion attached to the shield at the land, and a contact leaf portion. The improved clasp portion includes a flat body with a reverse bend hook at a first end, and a latch and a catch at an end opposite to the first end. The hook engages the outer edge of the land, and the latch engages the inner edge of the land. The catch includes a bent end portion that forms an acute angle with the remainder of the catch. The bent end portion is positioned to engage the inner edge of the land if the spring is rotated about the hook. The leaf portion is connected to and extends from the latch.

Abstract: A color cathode-ray tube includes a panel portion, a neck portion, a funnel portion connecting the panel and neck portions, a fluorescent layer formed on an inner surface of a face plate of the panel portion, a shadow mask disposed opposite to the fluorescent layer, an electron gun housed in the neck portion, and an internal magnetic shield disposed in the funnel portion. The internal magnetic shield is formed in a substantially quadrangular pyramid-shape having a substantially rectangular first opening with a smaller diagonal at one end adjacent to the electron gun and a substantially rectangular second opening with a larger diagonal dimension than the smaller diagonal dimension at the other end adjacent to the shadow mask.

Abstract: A shadow mask for a cathode ray tube includes through-holes defined by first and second recessed formed at first and second surfaces of the shadow mask, respectively. Each through-hole has a first wall farther away from a center of the shadow mask than a second wall thereof. The second recess has a smaller size than that of the first recess. The first wall is formed of a first wall portion defined by an inner surface of the first recess and a second wall portion defined by an inner surface of the second recess. The second wall portion of through-holes located at a peripheral region of the first region has a configuration such that electron beams reflected therefrom are directed to an inner surface of the first recess to thereby reduce electron beams reflected therefrom in directions different from a direction in which the electron beams are originally directed before the electron beams enter the shadow mask.

Abstract: In order to prevent doming effect in a shadow mask of a color cathode ray tube caused by thermal expansion of the shadow mask structure produced by heating of the shadow mask due to impingement of the electron beam thereon, the skirt portion of the shadow mask is provided, along at least one side thereof, with a long projection portion where the shadow mask is welded to the frame, an adjacent inclined portion which decreases in length toward the corner of the shadow mask and a short portion disposed therebetween the inclined portion and the corner. The inclined portion may decrease in length linearly or non-linearly.

Abstract: A color picture tube comprises an evacuated envelope having an electron gun therein for generating at least one electron beam, a faceplate panel having a luminescent screen with phosphor lines on an interior surface thereof, and a tension focus mask. The mask has spaced apart first metal strands which are adjacent to an effective picture area of the screen and define a plurality of slots substantially parallel to the phosphor lines. Each of the first metal strands across the effective picture area have a substantially continuous insulator layer on a screen-facing side thereof. The mask also includes a plurality of second metal strands oriented substantially perpendicular to the first metal strands. The second metal strands are spaced from the insulator layer when the tube is not energized and are in contact with the insulator layer when the tube is energized.

Abstract: A holder for maintaining an apertured shadow mask in fixed relation to the display screen of a color cathode ray tube (CRT) includes the combination of a mounting stud attached to an inner portion of the CRT's glass envelope and an apertured resilient metal holder attached to the shadow mask's peripheral frame and adapted to receive the mounting stud in a tight-fitting manner. A plurality of such mounting stud/metal holder combinations securely attach the top, bottom and lateral edges of the shadow mask frame to adjacent inner portions of the CRT's glass envelope adjacent its display screen. Heating of the shadow mask caused by the CRT's electron beams incident thereon gives rise to heating and thermal expansion of the shadow mask metal holders.

Abstract: In a cathode ray tube, a shadow mask has a hole portion where a plurality of electron beam passing holes are formed and a skirt portion extending from the edge of the hole portion. A frame has a support portion to which the skirt portion of the shadow mask is fixed for supporting the shadow mask and a flange portion extending from the support portion. The support portion and the flange portion have a plurality of holes formed therein. An inner shield is supported by the frame.

Abstract: A shadow mask for a color picture tube a thermal includes insulating layer preventing heat transfer to an apertured shadow mask. The side of the mask directed toward the cathode of the color picture tube is coated with a heat-insulating layer including particles having a porous structure. The pores may contain heavy metals or heavy metal compounds so that electron reflection and absorption occurs directly within the layer. The resulting heat is transferred to the interior of the picture tube instead of to the mask.

Abstract: A shadow mask for a flat CRT includes: an effective face in a central region having apertures through which electron beams emitted from an electron gun pass; a rail fixed to the mask, extending around the effective face; and ineffective faces outside the rail where mask holes are formed; wherein at least some of the mask holes formed in the ineffective faces of the mask are shaped as substantially circular dots, and decrease in diameter from the central region toward the outside of edges of the mask.

Abstract: Provided with a shadow mask which is designed to suppress the doming effect by providing a shadow mask plate material for a color CRT having an ideal texture suitable for an etching to form the uniform profile of holes for the electron beams to pass through and thereby to prevent the etching deviation, the shadow mask plate material consisting of as main component Fe--Ni alloy, thus the shadow mask being characterized by the volume ratio of crystals with CUBE orientation being 2 to 20 times as high as that of crystals with (.beta.)-Fiber in the shadow mask plate material for the enhancement of etching property; and the method of manufacturing the shadow mask including the steps of hot-rolling and cold-rolling, thermal-refining and heat-treating the shadow mask raw material to obtain a shadow mask thin plate having the volume ratio of crystals with CUBE orientation being 2 to 20 times as high as that of crystals with (.beta.)-Fiber; and etching, forming and blackening the resulting shadow mask thin plate.

Abstract: Device (8) for suspending the shadow mask (1) of a cathode ray display tube, of the type comprising a thermostatic bimetal (10) whose deflection between 60.degree. C. and 130.degree. C. is less than the deflection between 20.degree. C. and 60.degree. C. Bimetal whose deflection between 60.degree. C. and 130.degree. C. is less than its deflection between 20.degree. C. and 60.degree. C.

Abstract: An aperture grille for cathode ray tube which includes a frame having at least one cutout portion. The aperture grille further includes a color screening electrode having a plurality of grille tapes which are held in tension in the frame thus causing at least one stress level in an associated region of the frame. The cutout portion is positioned adjacent the region so as to reduce the stress level.