Abstract: The applications of the CRT proposed by the present invention include televisions and computer terminals, and the object of the present invention is to increase electrical security of the CRT. The CRT has a metal part 8 forming a vacuum glass container in order to reduce the weight of the CRT. A stud pin 12 made of an insulating material is on the inner surface of the metal part and fixes the shadow mask. The metal part 8 is joined between an edge of the panel screen 2a and an edge of the funnel 4, and forms a part of the vacuum container where the highest stress is applied. The stud pin 12 is fixed to the inner surface of the metal part 8 and fixes the shadow mask 10 by sealing to a plate spring 13 welded to the edge of the shadow mask 10. Since the stud pin 12 is insulating, it electrically separates the metal part 8 from the high voltage shadow mask 10. The stud pin 12 has a constriction or a multistage fin, and around the stud pin shielding material 16 made of a metal mesh or a metal plate is placed.

Abstract: A cathode ray tube with a shadow mask, the shadow mask structure being suspended and fixed behind the panel of the cathode ray tube. Plate springs for connecting the shadow mask structure and the panel are placed to apply pulling forces at either the sides or the corners of the shadow mask frame, so as to firmly hold the shadow mask to the skirt without deforming the shadow mask.

Abstract: The improved color picture tube includes an evacuated glass envelope having a rectangular faceplate panel with two long sides and two short sides. The panel includes a major axis paralleling the two long sides, a minor axis paralleling the two short sides and two diagonals that extend between opposing corners of the panel. The panel includes a shadow mask assembly mounted therein by support means that are located at the corners of the panel. The support means at each of the spaced positions includes a stud attached to the glass envelope and a spring having an aperture therein engaging the stud. The improvement comprises the studs being located slightly off of the diagonals of the panel between the diagonals and the major axis.

Abstract: A panel of a color cathode ray tube is disclosed which is characterized in that an extended portion contacting the inner face of the skirt portion and facing the inner bottom face of the panel is provided on each of the stud pins, so that the aluminum coating layer is let to extend to the extended portion. According to the present invention, the conventional graphite spreading process for supplementing the electrical connection state between the aluminum coating layer and the stud pins is omitted.

Abstract: A shadow mask frame for a color picture tube has side walls which are cut out to form cut-out sections, leaving only a plurality of bridge portions. A separate supporting means for the frame is provided in a direct contact with the shadow mask. According to the shadow mask frame of the present invention, the compensation period or the purity drift period from the starting of the operation of the color picture tube to the stabilization of the screen images will become very short.

Abstract: A thermally respective, monometallic article is isclosed which obviates the need for bonding of dissimilar metals as in a bimetal. The thermally responsive article is formed of an alloy or a metal and has at least two portions. The two portions are characterized by different coefficients of thermal expansion over a given temperature range, the difference being sufficiently large to result in deflection of the article when heated or cooled. In the preferred form of the article, the alloy or metal is present in a first phase in one portion of the article and in a second phase in the other portion. The process for obtaining the dual phase arrangement includes subjecting one portion of an intermediate form to cold treatment, cold reduction, decarburization, or a combination thereof, depending on the material used. A cathode ray tube employing the thermally responsive article as a temperature compensating device is also disclosed.

Abstract: An improved color picture tube includes a rectangular faceplate panel having two long sides and two short sides. A rectangular shadow mask is suspended at its four corners by support means within the panel adjacent to a cathodoluminescent screen located on the panel. The tube has three principal axes that are mutually orthogonal to each other. These axes include a longitudinal axis which extends through the center of the tube perpendicularly to the center of the panel, a major axis which passes through the center of the panel paralleling the long sides of the panel, and a minor axis which passes through the center of the panel paralleling the short sides of the panel. Each of the support means has a central support axis. The improvement comprises the two support axes on each side of the minor axis crossing a plane containing the longitudinal and major axes at a point located between the minor axis and a short side of the panel.

Abstract: An improved color picture tube includes an evacuated glass envelope having a rectangular faceplate panel. The panel includes a shadow mask assembly mounted therein by support means located at peripherally spaced positions within the panel. The support means at each of the spaced positions includes a stud, attached to the glass envelope, and a spring, having an aperture therein that engages the stud. The spring is interconnected with the shadow mask assembly. The improvement comprises the spring including a first portion interconnected with the shadow mask assembly, an elongated second portion extending from the first portion toward the stud, a third portion interconnected with the second portion and including an aperture engaging the stud, and an offset section that positions the center of the aperture on a central longitudinal plane passing through the second portion.

Abstract: A color selection electrode is suspended in a color display tube from pins which are provided in the corners of the display window. The suspension means comprise a resilient element which is secured to the color selection electrode, and a slide plate slidably secured relative to the flat resilient element rigidly secured to the pin. During the suspension the position of the color selection electrode is adjusted, and the slide plate is rigidly secured to the resilient element.

Abstract: This invention relates to a color display tube having a color selection electrode which is suspended from the display window by means of pin-shaped members which are inserted in the upright edge 3 of a display window. The pin-shaped members have a spherical free end 16 portion which engages in an aperture of a conical portion of the flat resilient suspension element attached to the corners of the mask. To avoid the flat resilient suspension element from lying against the pin-shaped member, the central axis A of the pin-shaped member forms an angle .alpha. of from 5.degree. to 20.degree. with the X-Y plane.

Abstract: In a color cathode ray tube according to this invention, there are provided a plurality of first elastic supporting members welded to a mask frame to support a shadow mask in a panel and each having a metal plate, and at least one second elastic supporting member each having a metal plate and a washer. The area of a polygon formed on a plane lying at right angles with the tube axis and having apices corresponding to the first elastic supporting members is at least about 1/2 of the area of the substantial quadrangle formed by projecting the shadow mask on said plane.

Abstract: A shadow mask mounting in a cathode ray tube includes an evacuated envelope including a funnel section, a cylindrical neck section and a faceplate of generally cup-shaped configuration, including a screen plate and a side wall perpendicular to the screen plate. The shadow mask mounting includes a shadow mask assembly including a rigid support frame and a finely perforated shadow mask mounted across the support frame, a plurality of generally elongated support members distributed around the support frame, stud pins each provided in the faceplate for anchoring one end of each support member to the side wall of the faceplate, and a generally elongated resilient member provided for each of the support members. The resilient member is for applying a biasing force, acting in a direction radially outwardly of the shadow mask, to the respective support member.

Abstract: The present invention provides an improvement in color picture tubes including an evacuated glass envelope having a rectangular faceplate panel. The panel includes a shadow mask assembly mounted therein by support means located at peripherally spaced positions within the panel. The support means at each of the spaced positions includes a stud attached to the glass envelope, a spring and a plate. The spring has an aperture therein that engages the stud. The spring is attached to the plate, and the plate is welded to the mask assembly. The improvement comprises the plate being welded to the mask assembly at only one location. This location is on a line, perpendicular to the plate, that passes through the center of the aperture in the spring.

Abstract: A color cathode ray tube according to this invention comprises a cylindrical neck section having an electron gun which emits three electron beams, a funnel section extending from the neck section, and a panel section having a faceplate on which an image is formed. Phosphor stripes for emitting red, green, and blue light rays, upon electron beams landing thereon, are formed on an inner surface of a faceplate of the panel. A shadow mask having slit apertures for directing the three electron beams onto the corresponding phosphor stripes is arranged in the panel, and is welded to a mask frame which is suspended and supported on the panel by supporting structures welded to the frame. Each supporting structure comprises a fixed section secured to the frame, and a movable section having a hole into which a panel pin is fitted.

Abstract: A color picture tube of this invention has a CRT envelope having a substantially rectangular front panel, a phosphor screen formed on an inner surface of the front panel, a shadow mask which is detachably mounted on the panel adjacent to the phosphor screen by a supporting assembly, and a frame surrounding the shadow mask. The supporting assembly has a plurality of stud pins which project from the four corners of the front panel and leaf springs which are fixed at one end to a corresponding corner of the frame are detachably engaged at the other end with a corresponding stud pin. Each leaf spring has an elastically deformable portion between one end portion fixed to the frame and the other end portion engaged with the corresponding one of the stud pins. Angle .beta., defined by the axis of the elastically deformable portion a central line axis of the CRT envelope, and angle .alpha.

Abstract: The shadow mask (2) of a color picture tube has retaining springs (6) near its corners and parallel to its rim. The free ends of the retaining springs (6) extend into the corners of the faceplate (1), where they rest on spherical ends (10) of studs (5). The ends of the retaining springs (6) are bent so as to be perpendicular to the longitudinal axes of the studs (5).

Abstract: Means for suspending a color selection electrode from the display window of a color display tube, the means consisting of a first element which is connected to the color selection electrode, and a two-part second element connected to the display window. The second element consists of two separately made parts, a head and a base, enabling manufacture and placement of the head with a high degree of accuracy, and resulting in improved insertion reproducibility of the color selection.

Abstract: A color picture tube comprises a panel of a substantially rectangular shape, a phosphor screen formed on the inner surface of the panel, a stud pin which is made of a rod with a tapered portion and which is mounted on the inner side surface of the panel, a spring member having a through hole and fitted with the tapered portion of the stud pin through the through hole, and a shadow mask mounted on the panel through the stud pin and the spring member so as to be opposite or adjacent to the phosphor screen, wherein if the spring member is in contact with the stud pin at least two positions, the following inequality is satisfied:N/F.ltoreq.1.8whereN: a force of the spring member acting on that portion of the stud pin which contacts the spring member along a direction substantially perpendicular to the surface of the stud pin (kg.

Abstract: The electrical connection between the shadow mask and screen of a cathode ray tube is provided by a contact spring, one end of which engages one of the metal mask support pins upstanding from the sidewall of the tube's faceplate, and the other end of which contacts the electrically conductive layer overlying the screen. Engagement with the pin occurs at a transition region between the conical base portion and the spherical head of the pin, and produces a simple and reliable electric connection between the shadow mask and the electrically conductive layer.

Abstract: A color picture tube having a shadow mask structure with a shadow mask and a mask frame supporting the shadow mask facing a phosphor screen inside a panel comprises a plurality of V-shaped support members, each having a folded portion apart from a sidewall of the mask frame and two arm portions extending from the folded portion.The support members support the shadow mask structure to the panel to control a relative distance beween the phosphor screen and the shadow mask according to thermal expansion of the shadow mask structure or the panel, whereby positions impinged by an electron beam on the phosphor screen remained invariably.

Abstract: A corner stud for a color CRT face panel comprises a hollow body having two juxtaposed frusto-conical portions, one closed and one opened. The opened end is sealed into the corner formed by two adjacent walls of the face panel.

Abstract: A color selection electrode (29) for a color television display tube is suspended in the corners of the display window (20) with the aid of suspension means which comprise a flat resilient element (27). The resilient element (27) comprises an embossment (28). The embossment (28) falls partly through a recess (36) in a brace (34) which is connected to the color selection electrode (29). This assembly of the embossment (28) and the recess (36) forms a so-called ball joint. As a result of the hinging action of the ball-joint the color selection electrode (29) is suspended without moments being exerted on the color selection electrode (29). FIG. 2a.

Abstract: A plurality of mountings for locating a shadow mask carrying frame in a color cathode ray tube each comprise one mounting element bonded to the tube wall and another mounting element connected to the frame, which together provide a spring-loaded spigot-and-socket connection. One feature is that the element has a portion bonded to the wall of a compatible material and a second portion of a hard material for low-wear. Another feature is that the element which provides the spigot has a recess therearound within the thickness of the wall into which the other element extends in order to save space.

Abstract: A color cathode-ray tube where an electron beam selection mask with an aperture grille type beam selection electrode of a thin metal plate attached to a frame is supported by engagement of stud pins with support springs and is thereby positioned stably opposite to a color luminescent screen formed on the inner surface of a panel. A projection is formed on either the top of each stud pin or the bottom of each cap opposed thereto, while a recess is formed in the other for engagement with the projection in the direction orthogonal to the action of the support spring. The mutual contact portions of such projection and recess are coated with solid lubricant films so that the beam selection mask can be reset at its proper position despite any external impact applied thereto.

Abstract: A compensator for a shadow mask for a color television picture tube comprises an elongated bimetal support member comprising a high expansion austenitic stainless steel alloy extending the length and half the width of the support member and a low expansion age hardenable stainless steel alloy extending the length and half the width of the support member, the two alloys being edge bonded to each other.

Abstract: The invention relates to a color display tube having a color selection electrode which is suspended in the tube by engagement of apertured elements connected to flat resilient elements extending from the corners of the electrode, with the spherical heads of pins extending from the corners of the display window. According to the invention, a rigid construction is obtained by providing apertures shaped so that each spherical part has at least three points of engagement with its respective apertured element, and at least one point of engagement is outside the plane of the flat resilient element.

Abstract: A corner stud for a color CRT face panel comprises a hollow body having two juxtaposed frusto-conical portions, one closed and one opened. The opened end is sealed into the corner formed by two adjacent walls of the face panel.

Abstract: The shadow mask of a color picture tube is connected to studs in the faceplate via hold members. To secure the hold members in position, screw or pressfit fasteners are inserted into the free ends of the studs. The heads of the fasteners force the hold members against the studs.

Abstract: In a color picture tube in which a shadow mask is placed close to a phosphor screen inside an envelope which has an oblong-shaped panel, the shadow mask is supported at the four corners of the panel by plate spring members. The spring members are each constructed from a 1st member which is fixed so that it is easily mounted on and dismounted from the stud pins on the panel and a 2nd member which is welded to the mask frame of the shadow mask. These members are incorporated as one by face-welding together at their ends. In this type of spring member structure, the members work together to alleviate the bending deformation which is applied to the members through the repeated mounting of the shadow mask panel which accompanies production.

Abstract: Hold members are used for abutting a shadow mask on the pins in the rim portion of the faceplate of a color picture tube. These hold members are of a two-part design and connected to one another with the aid of means permitting a transverse movement in relation to the axis of symmetry of the color picture tube. These means may consist either of a swivel joint or of a straight line motion device. During the first insertion of the shadow mask into the faceplate, any possible tolerances of the pins can be compensated for because the possible transverse movement of the hold members. The spacing between the shadow mask and the phosphor screen is not affected.

Abstract: An improved color picture tube according to the invention includes a faceplate panel having a cathodoluminescent screen thereon. A low expansion color-selection electrode is mounted in the faceplate panel by a support structure including a bimetal element. The support structure is responsive to changes in temperature of the faceplate panel and moves the color selection electrode relative to the screen.

Abstract: In a color picture tube, the shadow mask is suspended in a way such that the pins inserted into the rim portion of the faceplate are aligned vertically in relation to the axis of symmetry of the color picture tube. The free ends of the pins are of spherical design, and comprise a conical part. Two-piece, trapezoidal hold members for the shadow mask rest on the pins. Each of the hold members is resiliently pressed upon the pins by a locking spring.

Abstract: An improved color picture tube according to the invention includes an evacuated envelope enclosing a substantially rectangular cathodoluminescent screen, a color selection electrode suspended in register with the screen by a support structure, and an electron gun. The support structure includes a plurality of studs attached to the envelope adjacent to the corners of the screen and a plurality of springs connecting the color selection electrode to the studs. Each spring is a bimetal member of laminated construction having two layers of dissimilar metal joined along facing surfaces. Each of the springs has a proximal end attached at an angle to the color selection electrode and a distal end with an aperture therethrough which pivotably engages one of the studs. Each of the springs includes a step-like portion formed therein.

Abstract: A supporting device for an electron beam landing position selecting mask of a color cathode ray tube having an envelope, a color phosphor screen and an electron gun is disclosed which includes a metal stud pin arranged within the envelope and a spring member attached to the electron beam landing position selecting mask, the spring member being engaged with the metal stud pin so that the electron beam selecting mask is disposed in opposed relation to the color phosphor screen, the spring member having a polygonal engaging aperture bored therethrough at its end portion with which the metal stud pin is engaged wherein the stud pin contacts with the polygonal engaging aperture at three points to thereby settle the position of the electron beam selecting mask and the inner peripheral edge of the polygonal engaging aperture and the peripheral surface of the metal stud pin are fixed together at least at one point other than the three points by welding.

Abstract: A CRT has a spring for mounting the shadow mask assembly of the CRT onto a stud of the CRT panel. The spring has a circular flange contered on a stud receiving hole. Thus the stud hole is always straight up and at a fixed distance from a locator of an insertion machine regardless of any tilt of the spring, and therefore the shadow mask assembly is always correctly inserted into the panel.

Abstract: An improved color picture tube according to the invention includes an evacuated envelope enclosing a substantially rectangular cathodoluminescent screen, a color selection electrode suspended in register with the screen by a support structure, and an electron gun. The support structure includes a plurality of studs attached to the envelope adjacent to the corners of the screen. The support structure also includes a plurality of spring assemblies. Each spring assembly includes a first bimetal member attached to the color selection electrode and a second bimetal member having an aperture therein for engaging one of said studs. The first and second bimetal members provide longitudinal and rotational compensation, respectively, for maintaining the color selection electrode in register with the screen when the electrode and the spring assemblies are heated.

Abstract: Resilient means on the mask frame of a cathode ray tube support the mask-frame assembly by mating with positioning studs embedded in the sidewall of the tube's viewing panel. To prevent permanent deformation of the resilient support means, mesas are formed adjacent to each means to beneficially limit their flexural movement necessitated by repeated insertion and removal of the mask-frame assembly during tube manufacturing.

Abstract: A shadow mask assembly for a cathode-ray tube. The shadow mask assembly includes a taut shadow mask membrane affixed to one edge of a closed frame. The frame is angled inwardly from the edge for increased resistance to buckling. Mounting clips generally aligned with the tube axis are secured to the frame inwardly of the outer edge and project outwardly thereof into engagement with locating holes in the envelope. The clips are deflected inwardly behind the outer edge for disengagement and to permit assembly of the shadow mask into an envelope having an inside dimension close to the outside dimension of the frame.

Abstract: An improved color picture tube according to the invention includes an evacuated envelope enclosing an apertured mask attached to a frame which are suspended in relation to a cathodoluminescent screen by novel support means. The tube also includes an electron gun for forming a plurality of electron beams and directing the beams through the mask to the screen. An axis passing through the center of the electron gun and the center of the screen is the longitudinal axis of the tube. The screen also includes a major axis and a minor axis which are perpendicular to each other and perpendicular to the longitudinal axis. The support means includes a plurality of studs embedded in the envelope and spaced around the frame and a plurality of springs. Each spring has an aperture at one end engaged with one of the studs and each spring is attached at the other end to the frame.

Abstract: An improved bimetal mounting bracket for color cathode ray tubes allows an increase in the space between the mask and screen of the tube to accommodate a miniaturized electron gun without the need for changes to the other tube components.

Abstract: A color cathode picture tube including an envelope having a fluorescent screen therein, a shadow mask assembly having a shadow mask and a mask frame for holding the shadow mask at its peripheral edge, and a shadow mask supporting member for supporting the shadow mask assembly inside the envelope. The shadow mask supporting member comprises a first metal strip having a thermal expansion coefficient substantially equal to that of the mask frame, a second metal strip joined to the first metal strip at one side thereof so that their respective faces may form a continuous face, this second strip having a thermal expansion coefficient higher than that of the first strip, and a third metal strip joined to the first metal strip at the other side thereof so that their respective faces may form a continuous face, the third strip having a thermal expansion coefficient lower than that of the first metal strip.

Abstract: A cathode ray tube includes a faceplate panel with a plurality of electrode support studs distributed about and attached to the panel. A color selection electrode having a plurality of support springs is disposed within the panel. Each of the support springs comprises a strap-like element having a proximal end secured to the electrode and a distal end spaced from the electrode. A washer-like element is located between the panel and the distal end of at least one of the strap-like elements. The washer-like element has a frustoconically-shaped portion with an aperture therein for snugly receiving one of the studs. The base portion of the washer-like element is substantially flat and is permanently secured to the strap-like element near its distal end.

Abstract: A glass funnel for a cathode ray tube is formed by centrifically casting it in a rotating mold. Integrally formed lugs are formed on the interior wall of the funnel. The lugs vary in geometry and are utilized to position and attach a magnetic shield to the funnel. The funnel and its attached magnetic shield forms a subassembly that is independent of the remainder of the cathode ray tube components.A method is set forth for fabricating the funnel and the attached lugs by centrifugally spinning molten glass within a mold.

Abstract: An improved color picture tube according to the invention includes an evacuated envelope enclosing a mask attached to a frame, which is suspended in relation to a cathodoluminescent screen by novel support means. The tube also includes an electron gun for forming a plurality of electron beams and directing the beams through the mask to the screen. The novel support means includes a plurality of springs each having an aperture engaged with a stud which is embedded in the envelope. Each of the springs is attached to the frame and has a resilient portion between the aperture and each location of attachment. The resilient portion is inclined relative to the longitudinal axis of the tube, and a plane containing a major surface of the resilient portion approximately parallels one of the perpendicular screen axes.

Abstract: An improved color picture tube includes an evacuated envelope enclosing a mask attached to a frame, which is suspended in relation to a cathodoluminescent screen by novel support means. The tube also includes an electron gun for forming a plurality of electron beams and directing the beams through the mask to the screen. The novel support means includes a plurality of studs embedded in the envelope and a plurality of spring assemblies spaced around the frame. Each spring assembly comprises a first spring and a second spring, each spring including a central portion, two flexible portions extending from the ends of the central portion and two end portions extending from the flexible portions. The end portions of the first spring are attached to the end portions of the second spring. The central portion of the first spring is attached to the frame and the central portion of the second spring includes an aperture which is in engagement with one of the studs.

Abstract: A color selection electrode (7) is suspended from the corners of the upright edge (3) of a display window (2) by means of resilient elements (25) which extend substantially perpendicularly to the electron beams deflected towards the corners. The resilient elements (25) have apertures (28) with which the resilient elements (25) are placed on mandrils (31). The mandrils (31) are embedded in the corners of the upright edge (3) of the display window (2) perpendicularly to the planes of the resilient elements (25). A screening cap for screening the electron beams from the earth's magnetic field is connected on the mandrils (31) in such manner that the screening cap exerts no pressure on the resilient elements (25).

Abstract: A color selection electrode (7) is suspended in the corners of the upright edge (3) of the display window (2) by means of strip-shaped resilient elements (25) which extend substantially perpendicularly to the electron beams deflected towards the respective corner of the display window. The resilient elements (25), at their ends remote from the color selection electrode (7), comprise a peg (27) the axis of which extends substantially parallel to the direction of the electron beams directed towards the respective corner. In the corner of the upright edge (3) of the display window (2) a supporting element (30) is connected which comprises a portion (32) which is provided with an aperture (33), which portion (32) extends substantially perpendicularly to the axis of the peg (27). The pegs (27) fall partly through the apertures (33).

Abstract: Apparatus is disclosed for assembling a frameless, relatively thin and torsionally flexible shadow mask and four relatively thick and inflexible mask-suspension brackets. The apparatus, which is for use in the manufacture of color television cathode ray picture tubes, provides for conforming of the brackets to the contour of the skirt of the mask, and the welding of the brackets thereto. The brackets according to the invention have a planar central section and two arms for the embracing of and attachment to the skirt around the corners of the mask. Each bracket has at least one region in each arm adjacent to the central section that is perforated to decrease the cross-sectional area of the region and thus increase electrical resistance of the region.

Abstract: A mask support including a multiplicity of retainers is disclosed which supports a shadow mask assembly consisting of a shadow mask disposed in front of a fluorescent screen formed on the internal panel surface of a color picture tube and of a frame to hold the shadow mask. Each of the retainers comprises a spring member secured to the side wall of the frame and a rigid support member for supporting most weight of the shadow mask assembly, which rigid support member is attached to the spring member and engages a fixed member fixed on an internal surface of the picture tube. The spring member provides an action which causes the support member to be displaced towards the internal surface of the color picture tube so that the support member and the fixed member are firmly engaged.

Abstract: A color cathode ray tube is depicted which has a faceplate and a shadow mask mounted in precise relationship to the faceplate by a plurality of suspension devices spaced on the periphery of the faceplate. The suspension devices provide for rigidly and stably suspending the mask. Each suspension device comprises a stud extending from the faceplate and a leaf spring formed to support and space the mask in proper relationship to the faceplate with the spring having a first end formed for detachable engagement to the stud. A bracket or frame attached to the mask has a seat for receiving in permanent attachment the second end of the spring. The suspension device is characterized by the spring and bracket or frame having configurations at their interface which are such that the lateral edges of the spring are compressively preloaded against the bracket or frame to provide a wide stance, which enhances the stability of the suspension of said mask in relation to said faceplate.