Improvements with the assemblies of tube of television, their processes of obtaining and the avoid-implosion associated

FRENCH REPUBLIC

SERVICE

iNTELLECTUAL INDUSTRIELLE of the

PATENT On PROBLEMS [...] no. 936,562 [...] 1.374.367 international Classification: H 04 n

Society said: BROTHERS [...] LIMITED residing in the UK.

/- Demanded 30 May 1963, to 14^{m h 55,} to Paris.

Issued by f stopped 31 August 1964.

\-, ^ [Official Bulletin of the industrial A property, no. 41 of 1964.) (^ ^ patent[...] nde deposited in the UK 7 June 1962, under the no. 22.124/1962, the names of the applicant is aware and mm. Walter Raymond [...] William and Roy Blood.)

Assemblies

television tube, a-implosion for such a

the assembly and method of assembling a tube

television for a-implosion in a station

television.

In order to protect the viewer of a TV station-

sion, normally is provided, at the front,

between the cathode ray tube which constitutes the

television tube and the viewer, a screen trans-

own parent to prevent, during the implosion eventual-

standard of the tube, the glass pieces escape

the station in the direction of viewers. Such

said transparent screen will be, hereinafter, " shield [...] -

sion " and may conveniently be-Infection

glass engine.

By providing the implosion the shape of the tube,

can be reduced and the depth of the station is

already used various methods for

place of a cylindrical container and profile in a station

television. One such method affixes

by clamping a glass screen at a certain dis-

adhesion of the face or screen of the television tube and

this is ensured by means of a metal coupling-

jority. However, a coupling of this type requires a

expensive operations to the punch and pre-

feel, further, an exposed metal surface

capable of acquiring a high potential, so

to addition of devices

mass or predict the special arrangements

particular cover to protect the operator.

Another method already used includes separating

the implosion of the surface of the-ray tube

cathode forming, in the space between

the implosion and the tube, an interposed layer

cured resin. The resin [...] hand-

retains the implosion in the position rela-

cism desired relative to the tube, but the assembly

64 2191,0 73,590 3-φ-

a-implosion and of a tube by means of a resin is a costly and messy.

A main purpose is to provide a television tube assembly, and a method of assembling a tube for a-implosion in desired relative positions which substantially undo the main disadvantages of methods and arrangements heretofore used.

According to the present invention, there is provided a tube assembly comprising a television tube and a-implosion transparent glass cured, having the form of a plate which includes a base to double curvature, conforming to the shape of the end of the tube, and a continuous peripheral wall arranged to surround the end of the tube and to define, with the corresponding end wall of the tube, an annular space in which a lining shaped to serve as a shock absorber between the lateral and axial end of the tube and the tray.

Preferably, the invention includes a band that fits on the peripheral wall of the end of the tube and a bead secured to this strip which extends between the edge area of the front face of the tube and the base of the tray.

The present invention further relates to a-implosion cured transparent glass for use in a television tube assembly according to the invention, provided that-implosion in the form of a tray that has a socket at double radius of curvature conforming to the shape of the end of the tube and a continuous peripheral wall arranged to surround the end of the tube.

The implosion includes means for centring on its continuous peripheral wall and these means are, preferably, formed by a Price the booklet: 2 francs

ear provided at each of four corners of the continuous peripheral wall, each ear being adapted to engage in a body, so as to define the position of the-implosion, the latter protruding out through the body at a distance determined by the position of these lugs carried by its continuous peripheral wall.

Experience has shown an assembly of television tube according to the invention, comprising a-implosion which has the features mentioned, can be assembled by a process very simple and direct, whose implementation is relatively fast.

Therefore, according to this aspect of the invention, there is provided a method of assembling a television tube in a television set, including inserting into the body a-implosion station hardened glass which protrudes through the casing at a distance determined by means that it is packed, which bear against the interior of the box, and the engagement of the face of the tube in the back of the-implosion, through a sealing spacer which surrounds the sides of the face of the television tube.

It will be appreciated better the invention to the reading of the detailed description, which are to give example, one of its embodiments, with reference to the accompanying drawings, on which:

Figure 1 is a exploded view, partially sectional, components of a television tube assembly and a part of the front of the box in which will be the assembly;

Figure 2 is also a partially sectional view of the television tube assembly shown in Figure 1, placed in a headbox television set;

Figure 3 is, larger scale, a cross-sectional view of a portion of the television tube assembly shown in Figure 2, showing the shape and arrangement of the liner;

Figures 4 and 5 illustrate the method of mounting the television tube assembly in accordance with Figure 2.

In the drawings, the counter parts carry, on all Figures, the same numeric references.

On the drawings, the reference 1 denotes the set of a-implosion transparent glass cured in the form of a tray having a base 2 and a continuous peripheral wall 3. The base of the tray 2 is double-curved, i.e. its radii of curvature extend in two mutually perpendicular planes, its double curvature conforming to the shape of the end of the television tube 4. That is, the double curvature of the base corresponding to the double curvature of the screen of the television tube 4.

The continuous peripheral wall 3 is separated from the center of the implosion 1 by a distance greater than that between the outer edge and the center of the television tube 4, so that it is arranged to surround the end of the tube.

The implosion 1 is made from hardened glass, whose degree of curing is that desired to allow the imploding withstand the forces that it undergoes during the implosion of a television tube. These forces are: the pressure wave directed from the outside of the station to the interior of the television tube and blows to the face of the-implosion adjacent to the tube by the glass fragments projected.

Therefore, it is necessary that the degree of cure visor [...] or to enable the latter to resist both to a force tending to bend against the resistance afforded by the curvature of the platen 2, flying fragments that impinge on the concave face of the tray 2 during the implosion of a television tube.

The liner 5 is provided for holding the implosion 1 in the desired position with respect to a television tube 4, when the members are joined together to form the television tube assembly. The liner 5 may be rubber or synthetic resin foam, e.g. polystyrene foam, and comprises a strip 6, of the required dimensions to fit on the peripheral wall of the end of the television tube 4 and in the continuous peripheral wall 3 of the-implosion 1. The liner 5 comprises, further, a bead 7 secured to the band 6 and which is, in the joined position, between the edge area of the front face of the tube 4 and the base 2 of the tray formed by the implosion 1. The shape of the lining 5 is represented in detail in Figure 3.

Also represented, in Figure 1, a section 8 of which includes the television tube assembly.

Figure 2 shows the television tube assembly, comprising the-implosion 1, the television tube 4 and the packing 5, mounted in the cabinet 8, the implosion protruding through the body. The liner 5 provides cushioning lateral and axial between the end of the tube 4 and the tray 2 of the-implosion 1 and prevents, further, dust from entering the space between the front-implosion and the tube 4. The distance to which the-implosion 1 projects through the body 8 is determined by the position of the ears 9 (fig. 4) carried by the implosion 1, an ear 9 being provided at each of four corners of the continuous peripheral wall of the vehicle-implosion.

The assembly of television tube is held in place in the body by a support bracket 10 which surrounds the television tube door 4 and, further, against locator members 11 mounted within the station.