DE640110C - Metal vapor glass rectifier with bent anode arms and a continuation of the forearm that extends beyond the attachment point of the upper anode arm - Google Patents

Description

The invention relates to a metal vapor rectifier, in particular a mercury vapor glass rectifier for high performance.

The increase in the efficiency of mercury-vapor glass rectifiers has so far been made limited by the stress on the glass as a result of the heat generated by the arc. Are particularly heavily used the arms that house the anodes. The dimensions of the anode arms are determined according to length and diameter with consideration of the risk of re-ignition. That's why it is not easily possible by enlarging these arms and thus yours To create more favorable conditions for the cooling surface and to reduce the stress.

It is already known to use metal vapor glass rectifiers with kinked anode arms equip, in which over the attachment point of the anode upper arm extensions of the forearm reach out.

It is also known, a part of the anode arm with a metal cap and the Anode arm with a metal coating, e.g. B. by spraying, to be provided.

By these measures, however, the disadvantage of the unfavorable cooling effect of the Glass is not eliminated due to its poor thermal conductivity.

The risk of breakage of the anode arms formed in the known manner is therefore with the due to the high temperatures and poor heat dissipation occurring high Stresses on the glass, which is per se sensitive as a material, especially in the case of re-ignition and temperature fluctuations, great.

The disadvantages mentioned are eliminated according to the invention in that the anodes isolated parts of the vessel wall, namely the upper arms or the extension of the forearms or both, including the forearms, are made of metal.

Some exemplary embodiments are shown in the drawing.

Fig. Ι shows a glass rectifier, the arms of which are made entirely of metal,

Fig. 2 shows a glass rectifier in which only the upper arms are made of metal.

In the rectifier shown in Fig. 3, there is the over the attachment point of the Metal extension of the forearm extending beyond the upper arm.

In Fig. R, a glass bulb 1 is shown, in which the anode arms 2 completely Made of metal. Naturally, the power supply for the anode 3 must be separated from the metal anode by an insulating body 4.

*) The patent seeker stated as the inventor:

Dipl.-Ing. Alfred Siemens in Berlin-Grunewald.

upper arm 5 be separated. The same applies to the embodiment shown in Fig. 2, in which only the upper arm 5 from Made of metal. In both of the above-mentioned embodiments, this comes on the one hand aiii " mechanical, on the other hand thermal strength? j speed as well as a good cooling effect. In addition, you can now also parts that only need to be cooled well, but not otherwise are further claimed to run from metal, for example the continuation of the Forearm beyond the point of attachment of the upper arm. Such an embodiment is shown in Fig. 3, in which the extension 6 of the forearm is made of metal.

It is readily apparent that by employing metal arms according to the invention good cooling of the arc path is guaranteed and breakage of the arms is not to be expected. The current introduction, which can have one of the known shapes, must always against the metal parts of the vessel be isolated. Are the anode arms or those parts of the glass vessel on which "■ Metal parts are inserted, particularly strongly heated, so it is advantageous that the metal , at / the melting points have the same coefficient of thermal expansion like the glass used.

Claims (1)

Claim: Metal vapor glass rectifier, in particular mercury vapor glass rectifier for high power, addition, reaching with bent anode arms and the attachment point of the anode upper arm extensions of the lower arm, characterized in that "poor from the anodes isolated parts of the vessel wall, namely the upper arms or the extensions of the _sub-4, or both, including of the forearms, are made of metal. 1 sheet of drawings