DE205079C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- Λδ 205079 - CLASS 21 /. GROUP

JOHANN LUX in VIENNA.

Supports made of refractory oxides, such as

they are used with the osmium lamp, are not suitable for other metal filament lamps.

So you can, for example, tungsten filaments with an economy of around ι watt per

Hefner unit, with eyelets made of fire-resistant oxides, not prop.

It seems that at the points of contact

ίο the glowing thread and carrier Oxydationsbzw. Reduction processes (of the metal or of the wearer) and the threads perish prematurely at these points.

Are z. B. tungsten lamps, which are provided with supports made of oxides, with alternating current fed, these phenomena occur as a result of the constant oscillation of the thread seldom before.

However, if such a lamp is switched on

ao a direct current circuit, whereby the thread does not start to oscillate, so is already after shortly (12 to 48 hours) the thread will burn through at the point of contact with the wearer.

The above-mentioned interactions appear through continued calm contact Accelerated in direct current and through the great void of air in the pear to become.

The present invention enables the refractory oxides, e.g. B. the oxides of rare earths of magnesium, aluminum or mixtures of these oxides Support supports can also be used with tungsten or other metal filament lamps.

According to this invention, in a known manner, e.g. B. according to the Austrian patent 7245 produced support supports in order to make them usable for other metal filament lamps, metallized in the following way:

The supports are impregnated with solutions of metal compounds that can be reducible to metal, possibly in a vacuum to remove the gases in the carrier and to to allow an even distribution of the liquid in the carrier. Then you glow the loops, hooks etc. dried beforehand (possibly only in the air) in a reducing The atmosphere.

For example, you can use the. Thorium oxide generated vehicles with solutions of Metatungstic acid, colloidal tungstic acid, ammonium, possibly amine salts of tungsten, Impregnate the thio-tungstate, etc., then dry and place in suitable vessels if suitable Glowing temperature in a stream of hydrogen. The annealed supports are then left in the reducing gases to cool off.

The supports that have now cooled down have become light gray throughout, and you can do it yourself Do not perceive any other colored areas when enlarged.

Of course, you can repeat the procedure described a few times and thereby reinforce the metallization of the oxide carrier, especially on the surface.

Oxide carriers can also be metallized in the following way:

If the supports or girders made of refractory oxides are exposed to vapors Halogen compounds of tungsten or mo-

(see edition, issued on December 8th igrr.J

lybdenum, or is it incorporated into the molten halogen compounds of these metals, so you can either in the presence of reducing agents in the Cold or, if necessary, provided with metal coatings at a suitable, elevated temperature or metallize them through and through. In this way, oxide carriers can be used with almost all metals that are difficult to melt

ίο prepare.

The oxide carriers treated in this way have the advantages of a metal support without its disadvantages.

If you use metal supports, the glowing threads at the points of contact (of the thread and the support) so much heat is withdrawn due to the good thermal conductivity of the metals that they become dark have (non-glowing) spots.

On the other hand, the pure oxide carriers have the defects described earlier.

Under certain circumstances, one could use supports made of coal instead of supports made of refractory oxides Impregnate metal, but refractories are generally recommended Oxides.

Claims (5)

Godfather sayings: 1. Support for metal thread electrical Lamps, characterized in that in a known manner made of refractory oxides support supports either merely on the surface with a coating of one or more difficult-to-melt metals provided or impregnated or interspersed in their mass with one or more of these metals. 2. Process for the production of metallized supports from refractory oxides for electric metal filament lamps, characterized in that one known in Way columns made of refractory oxides with solutions from in the cold or treated in the heat reducible metal compounds, dried and then these substances absorbed by the carrier appropriately reduced to metal. 3. Process for the production of metallized supports from refractory oxides for electric metal filament lamps, characterized in that one known in Way made of the mentioned oxides with fused metal compounds treated and then the substances absorbed by the carrier are reduced to metal in a suitable manner. 4. Process for the production of metallized supports from refractory oxides for electric metal filament lamps, ■ characterized in that one known in Way made of refractory oxides with vaporous metal compounds either in the cold or at a suitable temperature, optionally with the simultaneous use of reducing agents Gases, treated, for the purpose of metallizing the carrier either only on the surface or, under certain circumstances, through and through. 5. Process for the production of metallized supports from refractory oxides for electric metal filament lamps, characterized in that one known in Manner made of the mentioned oxides supports repeated one of the processes according to claim 2, 3 and 4 or in sequence two or all of these processes.