DE1464316A1 - Process for the production of tension grids for electron tubes - Google Patents

Description

r. HY Philips' Gloeilaepenfabrieken M. I7.SQ + j ν

Old.". PH 17 804 dJo / Arta

. ··· July 1, 1963 "ΑβΑ ***

P H 64 316.4 1464316

"Procedures for the production of tension grids for flexural

to roar ".

The invention relates to a method of manufacture a 3 grid for .electron tubes with a metal wire u is wound on a frame in one direction

Such a tension grid consists of a frame Molybdenum or an iron-Miekel-cobalt alloy (Fernico), on which a tungsten wire is wound in one direction. So far, the turns aurden on the boast, for example by means of Introductions attached into which the wire is wound up inserted and firmly pressed into the intestine. For production of Tension grids with extremely thin uitteru seam with e.g. a ' Diameter from 5 to 10 / u and a very small size from z.ü. 50 / u for grids wound on one side and 100 / u for However, this method is not very suitable for double-sided wrapped grids.

Such tension grids are used, for example, in display tubes in which ten cathodes in perm of the digits 0 to 9 »one anode and one or more of these tension grids are present between groups of the digit-shaped cathodes or between two of these cathodes. The ziffernförnigen cathodes can be illuminated sum _o ebracht by aie be applied to a voltage relative to the ioiode. Of course, there is a 41 · tensioning grid lying between the digits. In high »Masi

be translucent eüe.en. $ 09902/04 52

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-2- fH. 17,804

Clamping devices are also often used in amplifier tubes

used. In Ancient on the course of the I -ti characteristic curve cer

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Let the (»ang height of the winding be very small.

When producing tensioners with a wire diameter of 5 to 10 / u and a pitch of 50 / u, attempts have been made to attach the 1 / wire frame in different ways. In solder containing copper or silver, which, as is well known, would be dirt at a relatively low temperature and therefore particularly suitable for me, is not usable when it is inside for electron tubes filled with a mercury vapor-containing gas, since the mercury contains these Easily forms amalgams in metals. It is also suggested that a metal band be welded on the wire over the windings. The sheaths were located on both sides next to the turns, because a tight lock on the turns led slightly to the fact that the wire broke off and came loose. With this one

after

Welding procedure, however, the wires were loose so that they could move easily.

It has also been proposed to use the turns to set an enamel layer that was applied as a suspension. This was also not a good solution because the suspension tends to get caught between the coils.

In particular, it is desirable that the wires are not fixed at too high a temperature. The usual materials $ _ν of Rahjftens, molybdenum or üieen-üickel-cobalt alloys have a Erhe oil I. greater thermal expansion coefficient than the material tungsten. After cooling down, the drab ttnat AioM is sufficiently tense that 41 · Hasti «ttäie« reft »a ©>

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It has also been suggested a better way of cleaning the water, in which the barge was first coated in a chemical bath of nickel with a phosphorous layer consisting of an aqueous solution containing nickel ions and hypophosphite ions. Then the Gixiesdraht wurue the race wound and daa (dance heated to a temperature between 700 and 800 ^0C. Un a Üickelschioht old to achieve a sufficiently low melting point "special Maesnahmen were required £ ntweder any cheniaches Vernicklungebad was dug in aea the nickel-plating has been carried out until the bath is exhausted or a small nickel-plating bath has been used to which a compound has been added which forms complexes with nicellonene.

With this attachment, however, the margin was relatively large. It showed that when the olfactory wire wound seams were heated, the prudish Nlokel-Voliran alloy was formed The wires are often only loosely, as soon as the nickel loops are completely screwed. . "{

By the method genfies of the invention, a considerable sale is achieved in this regard, inden der Frame initially galvanically or by chemical induction nit a tightly holding Micjeelschient Uoersogen, then old the aitteraraht wrapped and at the points where fttr ^ Wire is wound up, nlt a layer of winding or tiiokelosydpuiver beceokt and when Mlc / telpulver used in an inert,. or «wenii ll« iwloay «palv # r a reduiWrena · "Atnosphtre auf" int p

o. · 0 ·· 02 / β462 BAD ORIGINAL

FH. 17,804

$ 146 431

In this process the i »ic .-: el powder is sintered, uafaast the grid wires with good adhesion uru also adheres £ ut on the nickel-plated frame surfaces.

Since the glue inside and the powder inside the powder cause the adhesion on the surface of the coating, in this case it is not necessary that the Uiekelschloht galvanically or chemically applied to the surface has a particularly low melting point, each galvanically or by chemical means Reduction 'applied oil layer is suitable for feat sintering of the powdery HieKe la.

The powder layer made of nickel or liicKeloxyu svira preferably applied in a suspension

üinaoit ^ - _ö wrapped wire mesh can be made daauraii that two frames placed against each other are wrapped and na oh dea fix the uitterdrahtwlndu & gen ^; "., • according to the present method, earth the wire at the 4-way separating point along the two frames, see page, separated by cutting or grinding.

BATH ORIGINAL

Claims (4)

-5- Pri. 17,604 YJ A process for the production of a tensioning grid for electric electron tubes, in which a metal wire is wound in a seal on a socket, characterized in that the frame is covered with a firmly adhering nickel layer by electroplating or chemical reduction, then wrapped with the oitter wire and at least at the points in which the wire is wound on the frame, covered with a layer of nickel or nickel oxide powder and, if nickel powder is used, in an inert or, if nickel oxide powder is used, in a reducing atmosphere on a peratural wipe 600 ⁰ C is heated. 2. The method according to claim 1, for the production of a Spanntitterβ, characterized in that the nickel or nickel oxide powder is applied in a suspension. >. Process according to claims 1 and 2 »for production ▼ on one-sided wound wire mesh, characterized in that »Because Kahaen bits placed one against the other are wound around the oitter wire and after the wire turns are fixed, the wire is wound on · ν the separating atelle between the two feet along β.B. by j Cutting or separated by grinding. 4. 'Spfenngitter, which is divided by the method according to claims _t 1 to 3 berge'. 5 · Klektronenrihret % n the alndeiteno tin by the process according to claims 1 to 5 herfMteUt ·· Spannfitter an ^ tanned