DE1537270A1 - Mask holder for color television tubes - Google Patents

Description

MTIOIAL VIDEO CORPORATION, 4501 South Kolin Avenue, ' Chicago, Illinois, USA

"Mask holder for color television tubes."

The invention relates to a mask holder for color television tubes and in particular to such a device Bracket that allows the openings of the mask essentially as a function of γόη the temperature to change.

The invention is therefore based on the object "the to compensate thermal expansion of the mask by moving the mask in the axial direction, wherein the mask openings with the. -leg of electrons .of the electron exit to the phosphorus points curse

909843/0866

Bank account: Dresdner Bank AQ Herne 2436 · Postal account: Dortmund 558 68 · Telegram address: Bahrpatente Hemewestfalerr / Babetzpar Munich

BATH ORIGINAL

tend to be held. There is a new connection for this between the mask and the interior of the socket of the cathode ray tube according to the invention intended for serve purpose.

To solve this problem, the invention consists in a mask holder for color television tubes Ddt an elongated socket and a screen at one end in that the shadow mask on the socket near the screen by means of a bracket is attached, which has an arc-shaped part with an Inderung possibility of the arc to temperature changes in the hole, the mask being movable relative to the screen. Through this the mentioned task is solved and the desired ones Benefits are achieved.

Further advantages and details of the invention emerge from the description that follows of an embodiment with reference to the drawing.

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In this show:

Fig. 1 is a partial plan view of a screen of a color television set with a rectangular tube, on which an Iiaske in the according to the invention Way is arranged;

Fig. 2 is a vertical section along the line 2-2 of Fig. 1 with a device to hold the hatch on the side;

Fig. 3 is an enlarged detail of the

Iiaske with a side bracket; . ,

Fig. A view similar to i'ig. 3, however with the representation dc. Toilcin another location;

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5 shows a perspective of part of the mask holder. And

6 shows a view of a modified one Embodiment with elements of the

Bracket. .

With 10 is generally a rectangular color distance

very ear, 'and is for the sake of clarity this is illustrated only with its front part, i.e. with the front plate 11. On the inner front The surface of the mentioned plate 11 is a PhoB phosphor screen 12 arranged, which has several phosphor points, the light in plumb, blue and green colors emit, so that each point corresponding to the red, blue and green I-fields through the first, second and third electron emitters are excited, which in the non-illustrated Eng- place of the tube are provided. The reference number

13 generally denotes the shadow mask that is made up of

^ .a iiahmen 14 and frame-like parts 14a bees

at - to which the mask is welded. Of the

iLc.hiiier: 14 is to be used with a ■ connecting part 15 to

fp-t— ^, -_ ..

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Support of the mask in the drill 10 provided. Wi As can be seen from FIG. 1, brackets 15 in FIG. 2 are arranged on the side in FIG. and a modified embodiment is at 16 for supporting or stabilizing the upper part the mask provided in the tube. As far as the present invention is concerned, the connecting part 15 is only relates, which is arranged on the mask, the remainder of the locking part should have a wide variety of shapes accept.

The connecting part 15 is shown, for example, in FIG. 2 opened at one end as at 17 to form a support on the pin 13, which is a Inner part of the tube TO - acts. These pens will be embedded in the glass tube and serve as anchor connections 15. The connection part 15 is on its upper end is provided with an arched resilient holder 19, which is best illustrated in FIG is. The holder 19 shows feet 20 and 21 which are connected to one another by means of the cross part 22

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who are. This cross part 22 is welded to the part 23 which forms the connecting part 15, the part 23 being between the legs 20 and 21 is arranged. In this way, the connecting part 15 includes the holder 19 as well as one plate-like body 23, which is the part is, which has a generally rectangular opening 17 for receiving the mounting pin 18 is provided.

It can be seen from FIG. 5 that each arm is provided with an integral tab 24 at the end which is welded at 25 to the frame associated with the shadow mask 13, see the upper one right corner of Figure 3. Above that, each arm 20 and 21 is arcuate or in one generally stepped arcuate shape, as best seen by comparing Figures 3 and 5

can be taken.

■ χ. -

S The holder 19 is made of a material with a different

Ren thermal expansion coefficient produced than mask 14. For example, d§r_ ■ ·

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Retainer 19 have a negligible coefficient of thermal expansion, which is the case when it is made from Invar, while the mask 14 is usually made from cold-rolled steel. In a modification, the holder 19 can consist of material with a significantly higher coefficient of thermal expansion than the material that is used to manufacture the mask 14. "·

According to the drawing, the holder 19 is made of material with a low coefficient of thermal expansion manufactured. The mask frame 14, on the other hand, exhibits a high coefficient of thermal expansion therefore, the frame of Figure 3 expands to take the shape illustrated in Figure 4, will the holder 19 changed in its shape, as can best be seen from a comparison of FIGS can be. In other words, the degree or height of the arc of arms 20 and 21 is equal to the subsequent movement of the window frame 14 reduced to the screen 12, compare the

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Dimension χ in Figure 3 with dimension χ in Figure 4. ·

By moving the mask 13 onto the screen 12 the lateral displacement of a given opening 26 in the screen 12 is compensated for, and thus the opening 26 is again with the ■ Electron current and the special group of phosphorus dots aligned, which is activated by the flow of electrons.

In Figure 6, the connecting part 115 is again at 117 for mounting on the pin 118 with an opening Mistake. But two holders 119 and 119 * are arranged opposite one another so that a relative movement to the ignition part 115 and thus both a pivoting movement about the pin 118 as well as a translatory movement in the axial direction the mask. Each holder 119 and 119 'shows a tab 127 protruding from the part 123 and

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in the mask frame is enough to create a stable three-point support.

The terms "arched" and "arched" can be interchanged will. It will appear as an advantage that in some cases the feet 20 and 21 have side panels can have that with the crosses ^ istücken 22 form real arches that can be completed to form complete arches in contrast to the tendon-like training illustrated. In some other embodiments, it may be advantageous be to make the device from a single piece and not the welds 127 according to FIG. 6 to be provided.

Of the invention have been described, it should be emphasized that many changes may be made in detail by the skilled person without departing from the spirit of the ^invention: in the foregoing is only one embodiment.

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All details described and illustrated are important for the invention.

Patents;

909843/0866

Claims (1)

Claims .yrlaskenhalterung for color television tubes with a elongated socket and a screen at one end of the ear, thereby geten η ζ e i e h net that the liaske (13) attached to the socket (11) of the screen by means of a holder (19) is, which is an arched valley (20, 21) 119, 119 ') with a possibility of changing the Arch on Temp era door has changes in the "i-tube, the liaske being movable with respect to the screen. 2. Mask holder according to claim 1, characterized g e k e η η ζ e i c h η e t, cai. the bc ^ enförnigen Parts (20, 21) have a low '.. "ärmeausdehnungskoej have iisients as the liasque (13). BATH 909843/0866 3. Iiaskenhalterung according to claim 1, characterized characterized in that the arch-shaped Part (20, 21, 11S, 119 ') has a higher coefficient of thermal expansion as * has the mask (13). · 4. Mask holder according to claim 1, characterized in that a pair of the b arcuate parts (20, 21, 119, 119 ¹ ) is provided. i ?, I mask holder according to claim 4, characterized marked that the arch-shaped Parts (20, 21, 119, 119 ')' opposite the screen -. (12) are arranged similarly. . 6. Ilaskenhülteruvig according to claim 4, G adurch g e k e r, v. draws a pair of the arch Remaining wedges (20, 21, 119, 119 ') in relation to the Harness,: (12) are arranged opposite one another, uiifi in addition to the trc ^ r-slatory-u movement are resiliently pivotable. 9098A3 / 0866 7. Mask aging according to one or more of the foregoing Claims, characterized in that the mask (13) means inwardly protruding pins (Ic) is attached and a device for connecting the pins with corresponding Parts of the Masek is provided. o. Mask holder according to claim 7> marked ei without t that the device is attached to the mask (13) at at least three points. 9. mask holder according to claim 7, characterized g ~ e k e η η ζ ei without t that the device consists of a one-piece metal part. 10. Mask holder according to claim 9, characterized marked e i -c h η e t, daX the metal Invar is.. ORIGINAL BATH 909843/0866 L e r s e i t e