RU99111782A

RU99111782A - ELECTRON BEAM TUBE VALVE RESISTANT TO DIRECTED INSIDE EXPLOSION

Info

Publication number: RU99111782A
Application number: RU99111782/09A
Authority: RU
Inventors: Эйсиш ГОШ; Суреш Т. ГУЛЭЙТИ
Original assignee: Корнинг Инкорпорейтед
Priority date: 1996-10-24
Filing date: 1997-10-20
Publication date: 2001-06-10

Claims

1. Glass bulb for a cathode ray tube, containing a panel, the thickness (t) of which is determined by the equation:
σ _p = kP (a / t) ² ,
where σ _p is the resulting tensile stress in the panel, the panel having a resulting tensile stress of not more than 1150 psi (7929 kPa), the surface compressive stress created during the manufacture of the panel, and a hoop for protection against an inwardly directed explosion, set by hot landing around the side of the panel and increasing the surface compressive stress in the panel.

2. The glass bulb according to claim 1, characterized in that the panel has a rectangular shape.

3. The glass bulb according to claim 1, characterized in that the surface compression stress created during the manufacture of the panel is in the range of 450-1650 psi (3102-11376 kPa).

4. The glass bulb according to claim 1, characterized in that the surface compression stress created by the hoop to protect against an inwardly directed explosion is in the range of 170-290 psi (1172-1999 kPa).

5. The glass bulb according to claim 1, characterized in that said hoop is a hoop of the type of welded connecting plate.

6. A method of reducing the thickness of a glass panel in a cathode ray tube in which the thickness (t) is determined by the equation
σ _p = kP (a / t) ² ,
where σ _p is the maximum tensile stress in the panel, the method comprising creating a compression stress on the surface of the panel by surface treatment and increasing this compression stress by setting a hoop to protect against an inwardly directed explosion around the side of the panel while maintaining the value of σ _{p of} not more than 1150 psi (7929 kPa), which reduces panel thickness.

7. The method according to p. 6, characterized in that by treating the surface create a compressive stress on the surface of the panel in the range of 450-1650 psi. inch (3102-11376 kPa).

8. The method according to claim 6, characterized in that the compression stress on the surface of the panel is created by cooling the outer surface of the panel with a higher speed than the cooling rate of its inner surface.

9. The method according to claim 6, characterized in that they carry out a controlled removal of the generated stresses and thereby create a compression stress on this surface.

10. The method according to claim 6, characterized in that a hoop of the type of welded connecting plate is installed around the side of the panel by means of a hot landing.

11. A method of manufacturing a panel for a cathode ray tube, including stamping a glass panel having a predetermined shape and such a thickness that at a pressure of one atmosphere, the resulting tensile stress in the panel does not exceed 1150 psi (7929 kPa), cooling the outer surface of the panel at cooling it or controlling the release of generated stresses to create compression stress on the surface and installing, by means of a hot landing, a hoop to protect against an inwardly directed explosion around the side of the panel to increase stress compression in the panel, and the total compression stress reduces the resulting tensile stress in the panel to a value of not more than 1150 psi (7929 kPa) when the cathode ray tube is under pressure in one atmosphere.