PATENTSCOPE sera indisponible quelques heures pour des raisons de maintenance le mardi 19.11.2019 à 16:00 CET
Recherche dans les collections de brevets nationales et internationales
Certains contenus de cette application ne sont pas disponibles pour le moment.
Si cette situation persiste, veuillez nous contacter àObservations et contact
1. (WO1988003326) AGENCEMENT DE FENETRES POUR TUBES A RAYONS CATHODIQUES COULEUR ET PROCEDE DE FIXATION DE LA STRUCTURE DE SUPPORT DU MASQUE D'OMBRE A LA FENETRE DUDIT TUBE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS
1. A front assembly for a color cathode ray tube including a faceplate having on its inner surface a centrally disposed phosphor screen, said assembly
including a shadow mask support structure having an undulated cross-section and substantially surrounding the phosphor screen for supporting the shadow mask in tension upon said undulated structure, and means for securing said undulated structure to the faceplate.
2. The assembly of claim 1, wherein said undulated structure includes peaks disposed in a common plane to provide means for supporting said shadow mask in tension upon said undulated structure.
3. The assembly of claim 1, wherein said undulated structure includes valleys disposed in a common plane for securing said undulated structure to the faceplate.
4. The assembly of claim 3, wherein said undulated structure includes peaks disposed in a predetermined different common plane to provide means for supporting said shadow mask in tension upon said undulated structure.

5. The assembly of claim 2, 3 or 4, wherein the peaks or valleys of said undulated structure are flattened in a common plane, respectively.
6. The assembly of any of claims 1 to 5, wherein said undulated member comprises a strip of metal and the securing means comprises weld means or a hardened cement.

7. The assembly of any of claims 1 to 6, wherein said undulated structure is one of a plurality of said undulated structures substantially surrounding the
centrally disposed phosphor screen.
8. The assembly of any of the preceding claims, wherein the faceplate is fabricated of glass, and said undulated structure is secured to the faceplate by
embedding the structure partially into the glass when the glass is at a temperature in the range between its
strainpoint and its annealing point.

9. The assembly of claim 1, wherein said support structure comprises an undulated member, defining top and bottom sinuous edges, the bottom sinuous edge providing means for securing the support structure to the faceplate, and the top sinuous edge providing means for securing the shadow mask to the support structure.
10. The assembly of claim 8, wherein said undulated member has a generally uniform width, with said top sinuous edge being disposed in a plane generally parallel to the faceplate.
11. The assembly of claim 9 or 10, wherein said undulated member comprises a strip of metal and the sides of said strip are preferably flattened.
12. The assembly of claim 9, 10 or 11, including cap means having a land portion extending along said top sinuous edge elevated above the top edge for securing the shadow mask thereto.
13. The assembly of claim 12, wherein said elevated portion of the cap means is located along the inside of the top sinuous edge nearest the centrally disposed phosphor screen.
14. The assembly of claim 12 or 13, including a plurality of said undulated members and respective cap means substantially surrounding the centrally disposed phosphor screen and meeting at corner areas of the screen, the outside of the cap means being chamfered around said corners.
15. The assembly of claim 12, 13 or 14, wherein said cap means is generally ϋ-shaped with leg portions
overlying the sides of the undulated member.
16. The assembly of claim 15, wherein said undulated member and cap means are fabricated of metal material and the leg portions of the cap means are secured to the undulated member by weld means.
17. A front assembly for a color cathode ray tube including a faceplate having on its inner surface a centrally disposed phosphor screen, said assembly
including a shadow mask support structure for securing a shadow mask in tension upon said faceplate inner surface and for spacing the shadow mask from the screen, said support structure comprising an upper portion for securing the shadow mask to said structure, and a series of legs flared outwardly from each side of the upper portion in opposed directions to stabilize the support structure.
18. The assembly of claim 17, wherein said legs flare outwardly from said upper portion in an alternating array on opposite sides thereof.
19. The assembly of claim 17 or 18, wherein the support structure preferably comprises a strip of formed metal, the top of the upper portion providing a flattened ridge, said legs flaring outwardly from the ridge in an alternating array on opposite sides thereof.
20. The assembly of claim 17, wherein alternate ones of said legs are disposed in the plane of said upper portion and the remaining legs are angled outwardly from the upper planar portion preferably toward the screen.
21. The assembly of claim 20, wherein said support structure is stamped and formed from a generally planar strip-like blank.
22. The assembly of any of claims 17 to 21, wherein said faceplate is fabricated of glass, and said support structure is secured to the faceplate by embedding the distal ends of the legs partially into the glass when the glass is at a temperature in the range between its strain point and its annealing point.
23. The assembly of any of claims 17 to 21, wherein the distal ends of said legs are secured to flat plate means and the flat plate means, in turn, is secured to the faceplate preferably by a hardened cement.
24. A faceplate assembly for a color cathode ray tube comprising a glass faceplate having on its inner surface a centrally disposed phosphor screen, and a foil shadow mask mounted in tension on a mask support structure located on opposed sides of the screen, said mask support structure physically penetrating said faceplate for permanent, cementless anchoring of said structure to said faceplate, with the embedment of said mask support
structure being of such depth as to cause said structure to resist tensile forces created by said mask.
25. The assembly of claim 24, wherein said support structure comprises a material having a coefficient of thermal expansion compatible with that of said glass, such as a metal alloy or a ceramic.
26. The assembly of claim 24 or 25, wherein said support structure includes a surface for receiving and securing said shadow mask in tension, and a base portion physically penetrating a predetermined distance into said faceplate for anchoring of said support structure to said faceplate and placing said mounting surface at a
predetermined Q distance from said faceplate inner surface.

27. A process of securing a support structure for a tensed foil shadow mask to a glass faceplate having a centrally disposed phosphor screening area on an inner surface thereof, said process including the steps of providing a frame-like support structure for receiving and supporting said shadow mask in tension, said support structure having a mounting surface suitable for securing said mask thereon, and a base portion adapted for
physically penetrating said faceplate, providing a
faceplate at least said surface of which is heated to a predetermined temperature at which it is conditioned to be penetrated by said support structure, pressing said
structure into said faceplate through said inner surface on opposed sides of said screen, causing said base portion to penetrate to a depth effective both to secure said structure to said faceplate against the tensile forces imparted by said mask, and to position. said mounting surface at a predetermined distance from said faceplate inner surface, whereby said mounting surface is positioned for receiving said foil shadow mask in tension in
appropriate spaced relationship to said faceplate inner surface; and mounting said foil mask in tension on said mounting surface after the disposition of the phosphor screen on said inner surface.
28. The process of claim 27, wherein said
predetermined temperature of said faceplate is a
temperature in the range between the strain point
temperature and the annealing point temperature of said glass, i.e., in the range of 462 to 503 degrees Centigrade.

29. The process of claim 27 or 28, including the step of also heating the support structure to a
predetermined temperature and pressing said heated
structure into the glass of said heated faceplate to position said mounting surface at a predetermined distance from said faceplate inner surface.
30. The process of claim 29, wherein said
predetermined temperature of said support structure is a temperature substantially equivalent to the working point of said glass of said faceplate, i.e., about 1,000 degrees Centigrade.
31. The process of claim 29 or 30, wherein the support structure is heated by electrical resistance to the working point temperature of said glass after which said structure is pressed into said glass through said inner surface to permanently secure said structure to said faceplate and position said mounting surface in
appropriate spaced relationship to said faceplate inner surface.