DE2224702A1 - CATHODE TUBE WITH A MAGNETIC DEFLECTOR SET AND PROCEDURE FOR THEIR ASSEMBLY - Google Patents

Description

Kabhoen ray tube with a magnetic deflection tube set and method for their assembly

The present invention relates to one consisting of a .ivathovlenstranlrohre with a magnetic deflection coil set Arrangement and a method for producing such an arrangement.

With many cathode ray tubes, such as color television picture tubes, it is necessary to attach a magnetic deflection coil set to the outside of the tube-piston. A such deflection coil set contains horizontal and vertical deflection coils sox / ie one or more associated kernels. For color television tubes the deflection coil set generally serves to generate three electron beams both in the vertical direction and in the to deflect horizontally across the screen of the tube.

309829/0712 _bad0R1S1 NaC

222A702

- 9 -

The position of the deflection coil set in relation to the tube becomes current adjusted and the Ablerikspulsatz v / ird is then in the adjusted Layer attached to the tube.

There are already various devices known by which the deflection coil set in a desired position on the Rönre can be mounted and held. Common is the deflection coil set for this purpose arranged in a housing. From US-PS 3,566,321 it is known the housing and the deflection coil set to set up on the tube and then glue it there. When the tube is glued in place, the glue generally fills the gap between the housing and the tube. This may require a considerable amount of material and can therefore be used in operation of the tube result in insufficient strength and stability of the deflection coil set. Besides, the use large amounts of glue are uneconomical.

It is also known to put the housing on the pipes clamp and set up the deflection coil set in the housing and then also clamp it. In the case of a non-positive Attaching the deflection coil set by clamping, however, there is a risk that the deflection coil set accidentally is moved.

Finally, it is also known to glue a platform to the outside of the tube and then the deflection coil set and to slide the housing over the tube and clamp it to the platform. The platform is glued in generally by means of an adhesive tape coated on both sides with pressure-sensitive adhesive, which is placed between the tube and a platform provided fingers is arranged. The adhesive tape prevents the platform on the tube in general slides but is not the only support for the platform and the set of deflection coils attached to it. The deflection coil set housing is namely by an attached to it

309829/0712 _BAD original

Clamp attached to the tube. Even with one Deflection coil set attached in this way, there is a risk that the A deflection coil set is accidentally moved and the intended Position with respect to the tube during the life of the tube or the deflection coil set does not maintain.

The present invention is accordingly based on the object of a cathode ray tube with a magnetic Specify lead coil set at which it is guaranteed that the mutual position of the deflection coil set and the cathode ray tube throughout the service life of these parts

^c changes is retained.

This object is achieved according to the invention

achieved that a platform is fixed and rigid to predetermined, fixed Faces on the outside of the tube are attached by means of a hardened adhesive material, which is the only bracket for the platform and the deflection coil set mounted on it represents. The hardened adhesive material ensures an arrangement in which a predetermined operating position can be maintained during the life of the tube without the There is a risk of accidental displacement of the deflection coil set with respect to the tube.

In the present combination contains the

Plattforia preferably at least one recessed part, which forms a chamber between the outside of the tubular piston and the platform. The mentioned adhesive material is located at least in parts of this chamber. The receding part reveals itself the use of a thin layer of hardened adhesive material, which increases the rigidity and stability of the platform on the pipes and an economical glue consumption guaranteed are.

309829/0712 bad ORIGINAL

222A702

In one embodiment of the invention

Ciie platform and a deflection coil set housing are through one Ilaging device connected, which has a number of recesses in the housing and a corresponding number of projections on the platform. With Cpiel, every lead extends into one of the Recesses. A second hardened adhesive material is located at least between portions of each recess and each protrusion. This ensures a permanent connection between the tube, deflection coil set platform and deflection coil set, with no accidental relocation of the deflection coil set with respect to of the tube and no adjustment errors or further shifts are possible after adjusting the arrangement. There the length of the material used in the various recesses surrounds the respective projection, remains essentially constant, the result is a rigid, stable position of the deflection coil set on the tube.

In another embodiment of the present Arrangement contains the mounting device between the platform and the / \ blenkspulsatz at least three oversized Holes in the housing and a corresponding number of threaded protrusions on the platform. Everyone who Vorjjung is enough with a game or distance in a corresponding oversized hole. On each protrusion there are two threaded adjustment devices, one of which is one on each side of the housing so that it is clamped firmly between the two adjusting devices can. In this arrangement, the deflection coil set is adjustably mounted and is only supported by the platform. This results in a rigid, stable arrangement which allows the deflection coil set to be adjusted with respect to the tube and still eliminates the risk of accidental displacements of the deflection coil set with respect to the tube.

A preferred method of making a

22247Q2

Arrangement of a cathode ray tube and a magnetic deflection coil set bestexit that a platform on the tube and a first hardenable material is introduced at least between parts of the platform thus arranged and the tube v / earth. This curable material is then allowed to cure to attach the platform to the tube. Then a deflection coil set housing is made with the magnetic deflection coil located therein on the tube at the fixed platform. The position of the housing with respect to the fixed platform is then adjusted / that the deflection coil set / desired Operational position with respect to the tube assumes. The housing with the set of deflection coils inside is then adjusted in the Position mounted on the platform.

This method enables economical, quick and easy permanent assembly of a platform a tube as the only holder for a set of deflection coils.

The idea of the invention is explained in more detail below with the aid of exemplary embodiments in connection with the drawing / explained it show:

Fig. 1 is a partially sectioned side view of an arrangement of a cathode ray tube, a platform and a deflection coil set;

Fig. 2 is an enlarged partially broken away

Sectional view of the arrangement according to FIG. 1, seen in a plane 2-2 of FIG.

3 shows a sectional view in a TZ plane 3-3 of FIG. 2;

Fig. 4 is an enlarged, partially broken away

Sectional View of an Opposite Pig. 2 slightly modified version form,

FIG. 5 is a sectional view in a plane 5-5 of FIG. 4;

6 is an enlarged, partially broken away

Sectional view of a further modified embodiment similar the embodiment according to FIG. 2 and

FIG. 7 shows a sectional view in a plane 7-7 of FIG. 6.

The arrangement shown in Fig. 1 includes

a Loclimaskan color television picture tube 20 with an evacuated glass bulb 21. The bulb 21 contains a front part with a front plate 22, a funnel-shaped part 23 and a neck 24. On the inside of the front plate 22 there is a three-color fluorescent screen 25. The screen 25 is preferably a fluorescent strip grid of known design. An electron beam generating system 25 is arranged in the neck 24 and contains three beam generators (not shown) which are each assigned to one of the three fluorescent colors of the screen 25. In front of the screen 25 in the piston 21 there is a perforated mask 28 which, in the case of a luminescent strip raster screen, has slit-shaped holes. During operation, the electron beam generating system 27 supplies three electron beams which fall through the perforated mask 28 onto the screen 25. The electron beam generation system 27 is preferably a so-called ^: row beam generation system, ie a beam generation system which supplies three electron beam bundles lying next to one another in a row or plane and extending to the screen 25.

On the outside of the funnel-shaped part

309823/0712

A platform 29 is attached to the tubular piston. Furthermore. is on the piston at the transition from the funnel-shaped part 23 to Neck 24 a deflection assembly 30 is arranged, which is a set of deflection coils 31 and a housing for this contains. The deflection coil set 31 preferably contains two pairs of opposite, a magnetic deflection field generating coils (not shown) with toroidal windings. The deflection coil set can also a DC-fed electromagnet or a permanent magnet, such as a device for adjusting the convergence or color purity (not shown) included. The housing 32 with the set of deflection coils contained in it can on be attached to the platform in the following way:

E®st§_. Bracket for the deflection coil set

Example 1 : In Figs. 2 and 3 is an embodiment

Approximation example of the invention with the color television picture tube, 20, the Platform 29 and deflector assembly 30 are shown. The platform 29 is an annular component that is on the funnel-shaped Part 23 of the tubular piston is arranged. The platform 29 has a forwardly facing inner surface 33, the shape of which in essentially part of the outside of the funnel-shaped part 23 corresponds. The base of the platform 23 is arranged concentrically to the funnel-shaped part 23 and lies in one plane 34, which runs essentially perpendicular to the axis 35 of the tube 20. The inner surface 33 of the platform 29 has four re-entrant Parts or depressions 36, which lihen with im v / es ent equal VJinkelabstands are distributed on the inner surface 33. The recesses 36 preferably have the shape of recessed segments of a circular ring, as is shown in FIG. 2. tfei a platform 29 for a 17V color television picture tube the recesses 36 can be, for example, approximately 44.5 mm long, 19 mm wide and 7.9 mm deep. The platform 29 also includes first channels or holes 37 which pass through the platform and each open into the recesses 36, as shown in FIGS is. Rienn the platform 29 in the manner indicated above

30982Ö / 0712

funnel-shaped part 23 rests, the four depressions 36 each form chambers 3B between the funnel-shaped part 23 and the platform 29. The chambers 38 are hardened with a first Glue material 39 is essentially filled / that the Platform 29 immovably connects to the funnel-shaped part 23. This adhesive material is preferably a hot melt one thermoplastic adhesive. Suitable materials and melting temperatures are:

Material manufacturer melting temperature

(aancielsnaraen)

Versalon 1300 General Mills Chemical y 2 ° C

_T , _Ί τη -, - Co., Minneapolis, liinn. _Λ

Versalon 113o ,,, " _r o _r

Versalon 1165 "13 4 ° C

Resyln 34-2927 National Starch and Chemical Corp., New York Π.Υ. 58 C

The first adhesive material must remain solid and below the operating temperature of the tube, which is about 50 ° the temperature in practice around 150 ° C at which damage to the deflection arrangement or the tube occurs, to allow reuse of the parts. The adhesive material must also after solidification good on the glass bulb as well as the platform, which is made of a plastic, such as Noryl No. 3E-O-94O (manufacturer General Electric, Schenectady, N.Y.) may be liable. It is also desirable that the adhesive material hardens quickly to enable rapid and economical mass production. Preferably the first adhesive material should set in about 15 seconds after the end of the application.

The deflection coil set 31 is in the housing 32

assembled. The housing 32 has an annular portion with an inner surface 40 whose shape is substantially the same as that of a portion the outside of the deflection coil set 31 coincides. Of the

3Q982Ö / 0712 bad original

- q_

The deflection coil set 31 is provisional in the housing 32 by means of flexible ones waken 41, which form parts of the housing wall as it is made from 2 and 3 can be seen, held in a fixed position in the housing 32. In the final, immovable situation the Deflection coil set 31 on the housing 32 and this on the platform 29 by a second hardened adhesive material 42, which located between parts of the platform 29 and the housing 32 is attached. The second adhesive material is also preferably a hot melt thermoplastic adhesive material is used. Suitable materials and melting temperatures are:

Material manufacturer melting temperature

(Trade names)

Versalon 1138 General I ¹ UIls Chemical.

Co., Minneapolis, Minn. 125 C

Versalon 1165 "134 ° C

The second adhesive material must remain firm at the operating temperature of the deflection coil set, which is around 100 ° C and below that at about. Melt at a temperature of 15O ° C, in which damage to the deflector assembly or the tube would occur, in order to avoid reuse of the various Enable parts. When the second adhesive material 32 is directly on the outside (winding) of the deflection coil set is attached, it should preferably remain firm at 125 °. The second liver material must also be used after hardening adhere well to the platform 29 and the housing 32, which, as mentioned, is made of a plastic of the type indicated above Kind can exist. Preferably, the second adhesive material should be used within about 30 seconds after the insertion ends is to harden.

The platform 29 also has lugs or projections 43 which are essentially parallel to the platform 29 to aciise 35 of the tube 20 in the direction of the neck 24

3 09829/0712

IU

protrude. In the illustrated preferred embodiment, eight projections 43 arranged in pairs are provided and the pairs are spaced at substantially equal angular intervals on the top of the platform 29, as shown in FIG Fig. 2 is shown. The four pairs of protrusions are preferably each directly opposite one of the four depressions 36 formed to ensure structural alignment that is in integrity of the housing 32 with the platform 39 and of the tube 20 results. The holes 37 passing through the platform 29 preferably open between the projections of a associated couple, in the case of a 17V color television picture tube for example, the protrusions 43 project about 17.8 mm, about 2.4 mm thick and about 12.5 ima in length along an arc of a circle with a radius of 65 mm.

The housing 32 also has troughs or depressions 45, each over a pair 44 of projections on the platform 29, as shown in FIGS. 2 and 3. The recesses 45 are larger than the respective pairs of protrusions 44, so that the housing 32 prior to the introduction of adhesive material into the recesses 45 with respect to the platform 29 can be adjusted. The housing 32 can be displaced perpendicular to the axis 35 of the tube 20 in leases that represented by arrows X and Y in Fig. 2, and in parallel to the axis 35 in a direction Z (Fig. 1), about the axis 35 of the tube in a direction indicated by a double arrow R in the direction shown in Fig. 2 and rotated with respect to the axis 35 of the tube 20 in a direction indicated by a double arrow T in the direction shown in Fig. 1 are tilted. The inboard side walls 46 and the outboard side walls 47 of the depressions 45 limit the displacement perpendicular to the axis 35 and the tilting with respect to the axis 35. The end walls 43 of the depressions 45 limit the rotation about the axis 35 and the length of the engaging in the depressions 35 Projections 33 limit the displacement along the axis 35. The depressions 45 are preferably that much larger

309829/0712 bad origin-.

as the pairs of projections 44 _T that a movement of about 3.2 inm is possible in each of said directions.

The second hardened adhesive material 42 fills the in each case a pair of projections 44 surrounding recesses 45 substantially the end. In addition, the second cured adhesive material 42 fills second holes 50 between the inner side wall 46 of the depressions 45 and the outer winding of the deflection coil set 31 (see FIGS. 2 and 3) and connects therewith the deflection coil set 31 rigid and solid: with the housing 32. The second hardened adhesive material 32 fixes the housing 32 and the deflection coil set 31 in an unchangeable position permanently on the platform 29. The term "unchangeable" is intended here to mean a Location mean the except by removing or reheating the adhesive material cannot be changed. Adjustments or changes in position are not possible with hardened adhesive material.

Example 2: A second exemplary embodiment of the arrangement according to the invention is shown in FIGS. The arrangement contains a platform 51 corresponding to the platform 29 according to FIGS. 2 and 3, which is arranged on the funnel-shaped part 23 of the tubular piston. The platform 51 is an essentially annular component and contains a forwardly directed inner surface 52, the shape of which is essentially adapted to the shape of a part of the outside of the funnel-shaped part 23. As in the exemplary embodiment according to FIG. 1, the base 53 of the platform 51 is arranged concentrically on the funnel-shaped part '. The forward-facing inner surface 52 of the platform 51 has a peripheral depression 54. The depression 54 preferably has a width of approximately 25 mm in total and a depth which changes in the following manner: A central part 55 of the depression 54 is approximately 15 mm , 7 mm deep and 12.7 '".ΙΓΛ wide, while the depth of side parts 56a and 56b from 15.7 tuu aiii middle part 55 down to zero at the edges of the

309829/0712

depression 54 decreases. The platform 51 touches the funnel-shaped Part 23 at the outermost edges 57a and 57b of the recess 54.

The platform 51 also has lateral parts 5cia and 58b, which in cross section have a wall thickness of approximately 7.9 mm. As a result, the inner surface 52 can be well adapted to the shape of the surface of the funnel-shaped part 25. The side Parts 58a and 58b also allow the platform to undergo strong heating or cooling and thus expansion or contraction the combination soda to bend something. The platform 51 also has four first openings or holes 59 which open into the recess 54, as shown in FIGS. 4 and 5 is.

ienn the platform 51 in the described .7eise is arranged on the funnel-shaped part 23 of the tubular piston, the recess 54 forms a chamber 60 between the funnel-shaped Part 23 and the platform 51. At least a part of the chamber 60 is coated with a first hardened adhesive material

61 filled in, which makes the platform immovable with the funnel-shaped Part 23 connects. The same adhesive materials are preferably used as the adhesive material 61 as for the first adhesive material 39 of example 1.

The platform 51 has four lugs or projections

62, which correspond to the projections 43 of the first embodiment. Preferably four projections 62 are provided and distributed at substantially the same mutual angular distances on the base surface of the platform 51, as from FIG. 4 can be seen. In one embodiment, the protrusions have 62 preferably each have a diameter of approximately 8.7 mm and a length of approximately 18.7 ram. Preferably, the holes 59 go of the platform 51 each essentially through the middle of a the protrusions 60.

BATH

309829/0712 ^BA

* -13-

The deflection coil set 31 is first provisionally in a housing 63, which corresponds to the housing 32 of Example 1, mounted to form a deflector assembly 64. The housing has an annular part with four holding devices 65 which fit onto part of the outer surface of deflection coil set 31. The deflection coil set 31 is provisional by flexible hooks 66 is held on the holding devices 65 and assumes a fixed position in the housing 63. The hooks 66 correspond to the Hook 41 of Example 1 (Fig. 5). The final fixation ier position of the deflection coil set 31 in the housing is carried out by an adhesive material, which will be discussed in more detail below.

The housing 63 also contains troughs or depressions 67, which correspond to the depressions 45 of the first embodiment correspond and each receive one of the projections 62. A hole 63 opens in the bottom of each recess 67, as is from Fig. 5 can be seen. The recesses 67 are larger than the associated projections 62, so that the position of the housing 63 with respect to the platform 51 before the introduction of the liquid or pasty adhesive material 61 into the depressions 67 can be adjusted. Preferably, the depressions 67 are so much larger than the projections 62 that a displacement of about 3.2 mm in each of the directions mentioned in the description of Example 1 is possible. The interior side walls of the wells 67 are grounded through the outside of the deflection coil set 31 formed. There are therefore no holes, such as the holes 50 in the first embodiment.

The recesses 67 are coated with a second hardened adhesive material 69, which surrounds the projections 62 in each case, essentially filled out. The second adhesive material 69 also communicates with the outside of the deflection coil set 31 on the inside of the recess 67, as shown in Fig. 4 and 5, and thereby fixes the deflection coil set 31 rigidly and immovably in the housing 63.

309829/0712

Material 69 is preferably one of the second adhesive materials 42 of the first example is used. The second adhesive material 69 fixes the housing 63 in a permanent, immovable manner Position on the platform 51 and the deflection coil set 31 in a permanent, immovable position in the housing 63.

J usti newable halter clothes the Abl enkanordnung Example 3:

A third embodiment of the present new arrangement is shown in FIGS. Like Fig. 6 shows, this arrangement includes a platform 70 that comes in handy the same way as it was swept using Example 1 is firmly and immovably attached to the glass bulb 21 of the tube 20. The platform 70 includes a flat one Recess g or groove 71 and in this opening, continuous Holes 72. The groove 71 preferably has in one embodiment a depth of about 0.8mm and a width of about 19mm. The groove 71 is at least partially covered with an adhesive material 39 of Example 1 corresponding first hardened adhesive material 73 filled, which the platform 70 with the funnel-shaped Tel 23 of the tubular flask connects.

The deflection coil set 31 is mounted in a housing 74 to form a deflection assembly 75. The case 74 is toroidal and has a penetrating thickness direction through it Split radial slot. The radial slot is bridged with a clamping device that has a screw 76 with nut contains, which attack shoulders on both sides of the separation point and allow the housing 78 on a part of the Clamp the outside of the deflection coil set 31 around the deflection coil set 31 to be held in the housing 74, as shown in FIGS. 6 and 7.

309829/071 ^

The deflection coil set 31 is clamped as described in the housing 74 and this is then on the Platform 70 attached. The housing has a fixed, adjustable position with respect to the platform 70. The platform 70 projections or threaded bolts 77 which are essentially parallel to the tube axis 35 in the direction of the neck 24 protrude from platform 70. Preferably, there are three threaded bolts 77 with equal mutual angular distances arranged on the platform 70, as can be seen from FIG. The heads of the threaded bolts 77 are countersunk in the groove 71 and fixed by the hardened first adhesive material 73.

The housing 74 is penetrated by holes 78 which each correspond to one of the threaded bolts 77 and to Assembly of the housing 74 on the platform 70 are used. The holes 73 are each larger than the associated threaded bolts 77, so that a translational adjustment of the deflection coil set 31 with respect to the tube 20 is possible, as it is in connection with Fig. 1 had been explained. On the threaded bolts 77 are adjusting wheels 79 between the platform 70 and the housing 74, which have a locn with a threaded hole and a toothed outer edge, screwed on. During assembly, the deflection arrangement 75 is pushed over the threaded bolts 77 up to the adjusting wheels 79 and then nuts 80 with washers oil are applied to the ends of the bolts and up to Resting against the housing 74, as shown in Fig. 7, so that the deflector assembly '75 is clamped and the housing 74 is connected to the platform 70 in a mechanically adjustable manner.

I! Ontage of the deflection arrangement on the platform

In the preferred method of assembling a LYblenkspulensetze «31 on the glass bulb 21 of a cathode ray tube a platform is arranged at the glass bulb 21.

The platform should preferably face the piston 21 on its side Inside have at least one recessed part (like the recess 36 in Example 2). The platform fits around the piston 31 and is adjusted so that it runs essentially perpendicular to the longitudinal axis 35 of the tube 20.

Between the recessed parts of the platform unu a first liquid adhesive material is then introduced into the piston 20, e.g. injected, i ^ then ground the platform a deflection arrangement with the deflection coil set 31 and the associated housing. The deflection arrangement is then referred to the Rönre 20 adjusted to the intended operating position. iSiun the deflector assembly is attached to the platform. The attachment of the deflection arrangement to the housing can be carried out according to a method A or a method B according to FIGS Examples 1 and 2 can be attached permanently and not adjustable or can be adjusted according to method C according to example 3 attached v / earth.

Method A: Referring to FIGS. 2 and 3, a platform 29 is pushed over the handles 24 of the tube 20 and with it correspondingly shaped inner surface 33 brought into contact with the funnel-shaped part 23 of the tubular piston.

A certain amount of a liquid adhesive material previously heated to at least the melting temperature is then introduced through the first holes 37 until at least some of the four depressions 36 between the platform 29 and the funnel-shaped part 23 are filled. The first adhesive material 39 cools very quickly on contact with the recessed parts 36 and the piston 21 and solidifies in about five seconds. In example 1, the platform 29 is attached to the tube 20 in a permanent, non-adjustable position. Preferably the platform is in front of it & befe- 29 on the tube 20 in the following _v-described mounting of the deflector 30

309Ö2Ö / Q712

stigt.

The deflection coil set 31 and its housing 32 are preliminarily assembled to form a deflection assembly 36 before ax deflector assembly 30 is attached to tube 20. The pre-assembly of the deflection assembly is carried out in that the Deflection coil set 31 is pressed into the housing 32 by bending the flexible hook 41 (Fig. 3) until the deflection coil set 31 sits entirely in the housing 32 and the flexible hook 41 in an essentially undeformed position in front of the end of the deflection coil set 31 snap back and thereby hold the deflection coil set 31 in the housing 32, as shown in FIG. 3 is.

The deflection assembly 30 with the set of deflection coils fastened in it by the flexible sheets 41 is then shown in FIG brought an electrical test device not shown, which simulates a television receiver. The deflector assembly 30 is used in a device with which it can be adjusted in the directions mentioned above. Now becomes a tube 20 with a platform 29 attached in the manner indicated by the hardened first adhesive material 39 so in that not The test device shown is used so that the deflection arrangement is at least approximately centered with respect to the axis 35 of the tube 20 is and the pairs of attachments 44 on the platform 29 in corresponding Recesses 45 of the housing 32 engage.

The tube and the deflection arrangement are now put into operation electrically, with the screen 25 a test grid appears. The deflection arrangement 30 is then adjusted in the directions described until the desired operating position the deflection assembly 30 on the tube 20 is reached and the combination works optimally.

When adjusting the deflection arrangement 30

309829/0712

for a 17V color television picture tube, the tube 20 is brought into a horizontal viewing position with the deflection arrangement 30 arranged in the manner described above. The test grid or test image is then generated on the screen 25 with the tube 20 and the deflection arrangement 30. The optimal operating position of the deflector assembly 30 is determined by first displacing the deflector assembly 30 axially with respect to the tube in the direction indicated by the arrow 7 in Fig. 1 in order to establish the color centers on the screen 20 in a known manner. The deflector assembly 30 is then rotated in the direction of arrow R (Fig. 2) until there are substantially vertical and horizontal grid lines. The deflection arrangement 30 is now vertically displaced in the direction of the arrow Y (FIG. 2) in order to bring the different colored vertical and horizontal lines of the test piece as closely as possible into congruence, and the deflection arrangement 30 is then in the direction indicated by the arrow X (FIG. 2) The direction shown is shifted horizontally until the sizes of the grids of the different colors are substantially the same as a whole. The deflection arrangement 30 can also be tilted in the direction shown by the arrow T in FIG. 1 with respect to the tube axis 35 in order to optimize the above-mentioned conditions.

The baffle assembly 30 and tube 20 are

then erected in the adjusted position in the device, so that the axis 35 runs in the vertical direction and the neck 24 points downwards. This is preferably done in the test device, so that you can still carry out an operational check, as will be explained. The vertical positioning of the Tubing is done by orienting and holding the tube 20 in a fixture and then the fixture tilts until tube 20 and deflector assembly 30 stand upright with neck 24 facing down. In the upright Adjusted position of the deflector assembly 30 and the tube, a further liquid adhesive material 42 is in the liquid State in the open end of each recess 45 up to its w-

309829/0712

At least approximate filling is injected. With the tube upright and the recesses 45 open at the top, the amount can of the introduced adhesive material can be visually controlled and checked. Preferably the liquid second adhesive material so injected between the pairs of attachments 44 that it is on both sides flows around the lugs 43 and essentially fills the depressions 45 surrounding the lug pairs 44.

The second adhesive material 42 also flows through each of the second holes 50 until it comes into contact with the Outside of the deflection coil set 31. The holes 50 are thereby essentially filled. Even if the deflection coil set 31 does not fit exactly into the inner surface 40 of the housing 32 / thin sections of the second adhesive material 42 cure so quickly that that very little adhesive material due to any gaps or irregularities between the deflection coil set 31 and the housing 32 flows. The second adhesive material 42 hardens within about 15 seconds and after about one minute the arrangement can be can be taken from the test device. In some types, the chambers 38 allow the first adhesive material 39 to be so tight be included that the glass bulb breaks at very low temperatures, such as at -40 ° C. If there is any danger it can be avoided by the arrangement according to example 2 and method B.

After the second adhesive material 42 has been applied and cured, the assembly can be tested again before it is removed from the testing device. During this final test, the deflector assembly 30 sits freely on the tube 20 without additional assistance, as is the case with the television receiver .

Method B: Method B is very similar to Method A, the differences are primarily due to the different structure of the platform 41 and the housing

309829/0712

According to FIGS. 4 and 5, the platform 51 is raised over the neck 24 the tube 20 is placed and a certain amount of the melted first adhesive material is through the holes 59 in the Chamber 60 introduced. The first adhesive material 61 cools by contact with those at room temperature Split very quickly and set in less than 15 seconds.

The first adhesive material 61 introduced through the four holes 59 also flows in both directions from the holes until the currents meet and the chamber 60 is substantially filled.

In general, the tightness of the imported control the first adhesive material through the injection pressure, the injection time and the injection temperature. , «Jenn die The amount of adhesive material in each of the four holes 59 is controlled so that it does not completely fill the chamber 60 fills, four separate bodies are created from the first adhesive material. The four separate bodies were then im essentially the first adhesive material 39 in the four depressions correspond to the embodiment according to FIG.

The body or bodies made of the first adhesive material 61 in the chamber 60 decrease in thickness in the direction of the peripheral edges of the inner surface 52 of the platform. The thinner edge portions of the adhesive material 61 are also enclosed by the flexible side portions 58a and 58b of the platform 51, thereby allowing slight movement of the platform to compensate for differences in expansion and contraction of the glass bulb, platform and adhesive material with temperature changes.

The deflection coil set 31 and the housing 63 are preassembled before the deflection arrangement 64 thus formed is attached to the tube 20 . The pre-assembly of the

309829/0712

Deflection assembly 64 takes place in that the deflection coils - '^ set 31 presses into the housing 63 and thereby the hooks 66 (FIG. 5) .biegt until the deflection coil set 31 is completely on the holding devices 65 is present. When the deflection coil set 31 is properly seated in the housing 63, the flexible hooks 66 snap back into place their relaxed position before the end of the deflection coil set 31 back, as shown in Fig. 5, and hold thereby the deflection coil set 31 temporarily in the housing 63.

The deflector assembly 64 with the one held in it by the flexible hooks 66 and the holding devices 65 Deflection coil set is then converted into an electrical (not shown) Test device used, which simulates a television receiver. The deflector assembly 64 and a tube 20 with an on their attached platform 51 are used in the manner described with reference to Example 1 in the test device so that the Projections 62 engage in recesses 67. The deflection arrangement 64 is then adjusted to the intended operating position as explained with the aid of Example 1.

When the deflector assembly 64 and tube 20 are adjusted to the optimum operating position, melt will be melted second adhesive material 69 through holes 68 from the bottom of the wells 67 injected. Preferably, the molten second adhesive material 69 is introduced simultaneously the holes 68 of all four wells. The introduced second adhesive material flows into the recesses 67 and around the protrusions 62. In practice, the amount of the injected second adhesive material 69 is controlled so that it is used to determine the Projections 62 in the recesses 67 is sufficient. Using of a second adhesive material 69 having a relatively high melting point, as was mentioned with reference to Example 1, the material solidifies in wells 67 in less than 30 seconds.

Method B uses the same device

309829/0712 badorignal

v / ends as in example A, around the tube when injecting the second adhesive material 69 to hold in the recesses 67 perpendicular. Since the recesses 67 are provided with the holes 68 are, the second adhesive material 69 can be pressed into the depressions 67 from bottom to top. This enables a Filling of the depressions 67 also when additional chassis parts or simulated components of the test device are introduced Do not allow the second adhesive material into the open ends of the depressions according to Example A.

Method C: Referring to Figures 6 and 7, a platform x 20 is slid over the neck 24 of the tube and with the molded The inside is brought into contact with the funnel-shaped part 23. Molten adhesive material 69 is then passed through the holes 72 are pressed into the groove 71 to permanently and immovably secure the platform 70 to the tube 20, as is as described in procedures A and B above.

The platform 70 and bolts 77 are assembled prior to attachment to the tube 20. the Heads of the screw bolts 77 are countersunk in the groove 71 and the hardened first adhesive material 69 essentially fills the recesses and thereby holds the threaded bolts 77 in the platform 70 fixed.

The deflection coil set 31 and the associated housing 74 are assembled to form a deflection arrangement 75, before it is attached to the tube. The assembly of the deflection assembly 75 is accomplished by having the deflection coil set 31 is inserted into the housing 74 and the clamping screw 76 with the associated nut and thereby the housing 74 clamped on the set of deflection coils 31 surrounded by it.

Now the adjusting wheels 79 are screwed onto the threaded bolts 77 until they are at least approximately at the

30962Ö / 0712

The surface of the platform 73, as shown in FIG. 7 is.

The deflection arrangement 75 is then temporarily mounted in a mounting device of a test device, which allows the deflection arrangement to be adjusted in the directions X, Y _f Z, R and T mentioned in Example A.

The tube 20 is now in the horizontal viewing position inserted into the test device so that the threaded bolts 77 come to lie in the holes 78 of the housing 74. the The tube is arranged so that its axis 35 extends substantially centrally through the deflector assembly 75. The holding device presses the deflection arrangement 75 against all adjusting wheels 79. The screw nuts 80 and used for fixing Washers 31 are then screwed a few turns onto the threaded bolts 77, but not tightened, see above that a margin of about 3 to 3.5 mm to the housing 54 remains.

The arrangement of the tube and the deflection coil set is now put into operation and the deflection assembly 75 wirivder in the manner described in Example A adjusted until the optimal operating position of the deflector assembly 75 with respect to the tube 20 is reached is. When adjusting the operating position of a deflector assembly 75 for a 17V color television picture tube, the deflector assembly 75 first adjusted axially in the direction of arrow Z (Fig. 1) in the direction of the neck 24 of the tube 20 by the adjusting wheels 69 are rotated by the same amount in each case. This creates the color centers of the three electron beams aligned in a known manner on the screen. The deflector assembly 75 is then moved in the direction of arrow R (Fig. 6) rotated to align the vertical lines of the test pattern to the vertical direction of the screen and the horizontal lines of the To align the test image to the horizontal direction of the screen.

309829/0712 badow »ml

judge. This is followed by a vertical translation movement the deflection assembly 75 in the direction of arrow Y (Fig. 6) and a horizontal translational movement in line with the arrow X (Fig. 6), as it had also already been described in Example A, to those written by the three electron beams To bring the grid and the grid as a whole to coincide. The deflection arrangement 75 can also be adjusted by unequal adjustment of the adjusting wheels 79 in the direction of the arrow T in FIG. 1 with respect to the axis 35, to the position of the deflection arrangement to optimize.

After the desired operating position has been reached, the adjusting wheels with the screw nuts 80 and washers 81 tightened to deflector assembly 75 to secure deflector assembly 75 in the adjusted position to the platform 70 to lock. The deflection arrangement 75 can then be released from the holding device used for adjustment and the assembly can then be rechecked to ensure that while the second adhesive material is being fed in 69 the order has not been shifted.

The platforms described with reference to the preferred exemplary embodiments contain a peripheral depression or groove or four depressions, but of course other shapes are also possible, for example several parallel, narrow IJuten on the periphery of the shaped inside. If an adhesive material is used which sets quickly, the length of the flow path and the time of solidification of this adhesive material determine, to some extent, the size and shape of the indentations. Empirical investigations have shown that the Klöbematorial becomes cold and solidified too quickly for it to be inserted through a hole and over the entire surface

3 0 9 8 2 9/0712 bad original

could be distributed. There are therefore several for each azimuthal hat Holes required to insert the adhesive material. The volume of the wells determines the amount required • Adhesive materials. For economic reasons one will therefore generally do not make the indentation or indentations larger than necessary to provide structural strength and achieve rigidity.

VI if the deflection arrangement is permanent and unadjustable is attached to the platform, a peripheral tongue and groove can be used in such an embodiment however, an uneconomically large amount of adhesive material may be required. In the preferred embodiments the required structural rigidity is achieved with an ilininum on second adhesive material. The amount of Second adhesive material is also in these embodiments regardless of the final position of the deflection coil set housing and platform.

A heat fusible adhesive material was used in the preferred embodiments, but other adhesive materials such as paraffin wax or epoxy resins can be used if the setting or setting time is not critical. For the present arrangement and the present method, it is only important that the adhesive material used meets the structural requirements explained; the adhesive material can also be applied to the platform in the form of pearls or tropics before assembly, instead of being pressed or injected in the manner described to become.

The embodiments described above concerned Color television picture tubes with multiple beam generators or a beam generation system that uses multiple electron beams different arrangement delivers. However, the invention is

309829/0712 BADORlGiNAt

not restricted to this, but can also be used with other cathode ray tubes, for example single-ray tubes such as Schwär ζ-v / ei ß-picture tubes, or single-beam television recording devices. The invention is therefore very generally applicable to cathode ray tubes that. contain a deflection or focusing device which is to be fixed in a certain position with respect to the tube or the electron beams in the tube. However, the invention is particularly advantageous for multi-beam tubes in which several grids are generated by deflecting the electron beam across the screen of the tube. The described permanent fixation of the deflection coil set with respect to the electron beams of the tube ensures an optimal coincidence of the through
Electron beams on a grid written on top of each other.

098 29/07 12

Claims (7)

7417-72 / Dr. V. B / Elf 2/24702 Patent application before Iy) cathode ray tube with a magnetic deflection coil set, characterized / that the deflection coil set (31) is fixedly mounted on a platform (29,51,70) which is rigidly attached to predetermined surfaces on the outside of the by a hardened adhesive material (39,61,73) Tube (20) is attached. 2.) cathode ray tube with deflection coil set according to claim 1, characterized in that the adhesive material (39,61,73) is a hot melt thermoplastic. 3.) cathode ray tube with deflection coil according to claim 1 or 2, characterized in that one with the deflection coil set (31) and the platform (29,51,70) Housing (32,63,74) is attached. 4.) cathode ray tube with deflection coil set according to claim 1, 2 or 3, characterized in that the platform has at least one recess that forms a chamber (38, 60, 71) between the outside of the piston (21) the tube and the platform (29,51,70) and is at least partially filled with the adhesive material (39,61,73). 5.) cathode ray tube with deflection coil set according to claim 3, characterized in that the housing (32,63,64) has several recesses (45,67) in which a corresponding number of projections (44,62) of the platform (29,51) extend in such a way that there is a space between the depressions and the projections reaching into them remains and that the projections in the associated 309829/0712 Room Wells are attached by an adhesive material (42,69). 6.) cathode ray tube with deflection coil set according to claim 5, characterized in that the projections (77) are each provided with a thread and that two threaded adjusting devices (79, 71) are screwed onto each projection, between which the housing is firmly clamped. 7.) Method for producing an arrangement from a cathode ray tube and a magnetic deflection coil set according to claim 1, characterized in that gluing a platform (29,51,70) onto the tube; that a housing (32,63,74) with a set of deflection coils fixed in these (31) placed at the platform; that the position of the housing with respect to the platform to a desired Operating position of the deflection coil set is adjusted with respect to the tube and that the housing is then attached to the platform will. 309829/0712