FI66502B - VAERMARANSLUTNINGSBYGEL FOER KATODSTRAOLEROER - Google Patents

Description

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The Federal Republic of Germany-Förbundsrepubliken

Tyskland (DE) P 2734869.2 (71) International Standard Electric Corporation, 320 Park Avenue,

New York, N.Y. 10022, USA (72) Peter Schmidt, Denkendorf, Germany Republic of Germany 1 ta-Förbur> dsrepub-1iken Tyskland (DE) (74) Oy Kolster Ab (54) Heater connection bracket for cathode ray tubes -VSrmaransIutningsbygel för katodsträlerör

The invention relates to a heater connection bracket for cathode ray tubes, in particular color picture tubes, wherein the head of the heater is welded to each half of the bracket, the bracket halves being attached to the support arms of the electrode system and conductively connected to the heating joints in the tube base.

Such heater connection brackets are known, e.g. from FR patent 1,504,694, from DT application 1,564,462, in which they are shown in Fig. 1 as part 11 and are described in DT application in the lower half of page 10. The heater bracket 11 is made in one piece and, after installation of the heater, is welded to the support arms 10 and connected by tongues 12 to the heating joints in the pipe base. By separating the part 11 ', the bracket 11 is separated into two electrically isolated bracket halves 1 and 2. When separating the part 11', there is a risk that the adjustment of the installed and adjusted heater will be disturbed again. System installation then requires that both; 2 The ends of the 66502 heater connection bracket are mechanically attached to each other.

It is therefore an object of the present invention to find a solution which makes this possible without subsequent removal.

The solution to this problem is apparent from the claims. The advantage in this case is that a sturdy, one-piece heater connection string is available for the installation and adjustment of the electrode system, which does not have to be removed again later. The omission of the subsequent removal step then practically offsets the additional costs caused by the manufacture of a handle consisting entirely of two halves and connected by an insulating piece.

"The invention will now be described in detail by means of figures.

Figure 1 shows a heater connection bracket according to the prior art.

Figure 2 shows this bracket with an insulating component according to the invention.

Figure 3 shows a variant in which the insulating component is a glass bead.

The structure of the connecting bracket of the prior art heater according to Fig. 1 has already been described in detail in the introduction. Figure 2 shows a heater connection bracket according to the invention, which consists of bracket halves 1 and 2, which, although insulated from each other by the insulating component 3, are nevertheless mechanically firmly connected to each other. Any material common in high-temperature technology in the temperature range of the heater's connection buckets, such as ceramics, glass, mica, etc., can be used as the insulating material. Only the gaseous waste trapped at the temperatures, which could impair the vacuum of the picture tubes, should be taken into account. and that the mechanical connection between the bracket and the insulating component can be carried out easily and economically and that this connection retains sufficient strength also during the melting operations carried out during the installation of the electrode system and the picture tubes. The material of the handle halves 1 and 2 used in pipe technology is the common iron-nickel or iron-chromium or nickel-chromium alloy available under the trade name Vacon 10. If glass is used as the insulating material, both handle halves 1 and 2 can be joined together. by melting the insulating material into a glass bead. This is shown in Fig. 4, in which the handle halves 66502 1 and 2 made of wadding are mechanically connected to each other by a glass bead 3 '. This heater connection bracket is welded to the support arms (not shown) which simultaneously supply the incandescent voltage, and is thus fixed in the desired position.

Finally, the question of whether the insulating component 3 could possibly be coated with a conductive layer when possibly sucking gas waste from the picture tube should be examined. As in all tubes, the gas vacuum ball is also placed in the picture tube so that as little metal gas as possible is deposited on the surface of the electrode structure. When the gas is sucked in, practically only an atomic layer is deposited, which is itself so large-scale that it is insignificant for the supply of the glow stream as a side stream.

In the connection handle of the heater according to the invention, the separation of the connection part after the installation of the electrode system is eliminated. Due to the omission of this cutting phase, the adjustment of the installed system can no longer be disturbed.