AT232296B

AT232296B - Thermal bimetal for measuring the temperature of the environment

Info

Publication number: AT232296B
Application number: AT128461A
Authority: AT
Inventors: Josef Dr Graw
Original assignee: Josef Dr Graw
Priority date: 1961-02-15
Filing date: 1961-02-15
Publication date: 1964-03-10

Description

  

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  Thermobimetall zur Messung der Temperatur der Umgebung 
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 dann gemeinsam mit diesem verschweisst oder verlötet werden. Dann werden die Drähte gemeinsam vom Bimetall abgespreizt. Vorzugsweise verwendet man dünne Kupferdrähte, die nach dem Umwickeln und Befestigen in ein Zinnbad getaucht werden. Anschliessend werden die Drähte abgeschnitten, galvanisch stark gebeizt und versilbert. Diese Herstellung ist einfach und billig. 



     AlsWärmeaustauscher   können anstelle der   dünnenDrähte erfindungsgemäss   auch schlanke Kegel verwendet werden, die mit ihrer Basis am Thermobimetall befestigt sind. Man stellt sie aus einem Metall grosser Wärmeleitfähigkeit, beispielsweise Kupfer, her, und macht ihre Oberfläche gut strahlenreflektierend. Sie können durch ein elektrolytisches, nachträgliches Abätzen des Bimetalls hergestellt werden, indem man letzteres stark beizt und anschliessend schwach versilbert. Sie leiten die Wärme aus dem Bime- - tall genau so schnell ab wie zylindrische Drähte, haben aber einen günstigeren Formfaktor.



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  Thermal bimetal for measuring the temperature of the environment
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 then be welded or soldered together with this. Then the wires are spread apart from the bimetal together. It is preferred to use thin copper wires, which are immersed in a tin bath after being wrapped and fastened. Then the wires are cut off, strongly electroplated and silver-plated. This production is simple and cheap.



     According to the invention, instead of the thin wires, slender cones can also be used as heat exchangers, the bases of which are attached to the thermal bimetal. They are made from a metal of high thermal conductivity, for example copper, and their surface is made to reflect rays well. They can be produced by electrolytic, subsequent etching of the bimetal by pickling the latter strongly and then silver-plating it slightly. They dissipate the heat from the bimetal - just as quickly as cylindrical wires, but they have a cheaper form factor.

Claims

PATENT CLAIMS: 1. Thermobimetal for measuring the temperature of the environment, for example air, especially for radiosondes, characterized in that the bimetal is thermally conductive with bodies of a large heat transfer factor to the environment and low capacity for radiant heat, such as. B. thin wires or slender cones connected.

2. thermal bimetal according to claim 1, characterized in that the thin wires spread approximately perpendicularly from the bimetal sheet.

3. thermal bimetal according to claim 1, characterized in that the bimetal at a certain distance, for. B. in the region of recesses (11) is spanned with thin wires.

4. thermal bimetal according to claim 1 or 2, characterized in that the bimetal itself has a wire shape (Fig. 4, 5).

5. thermal bimetal according to claim 4, characterized in that the wire shape tapers towards the end (2a) carrying the pointer (7) in cross section (Fig. 5).

6. Thermal bimetal according to claim 4 or 5, characterized in that the end (2a) of the bimetal carrying the pointer (7) has a circular cross-section, while the stationary end (2b) has an elongated cross-section.

7. thermal bimetal according to one of claims 2 to 7, characterized in that the thin wires taper from the fastening point on the bimetal, preferably that they have the shape of slender cones.

8. thermal bimetal according to claim 1 or 2, characterized in that it is surrounded by a heat-insulating layer (22, 23) and a highly reflective layer (24) through which the wires (25) lead to the outside.

9. thermal bimetal according to claim l, characterized in that a cooling frame (20) with thin wires (21) is connected to it in a thermally conductive manner (Fig. 7).

10. thermal bimetal according to claim l, characterized in that it is thermally conductive via a body of good thermal conductivity (40) with a heat exchanger (41, 42) of high reactivity and low radiation sensitivity (Fig. 8).

11. thermal bimetal according to claims 1 and 10, characterized in that the bimetal and EMI3.1 sphere are connected.

12. thermal bimetal according to one of claims 1 to 7, 9 and 10, characterized in that the thermal bimetal is attached without radiation protection on that upper side of the radiosonde which is in the direction of flight (Fig. 10).

13. Thermal bimetal according to one of claims 1, 2, 3 and 8, characterized in that all the wires are placed on the bimetal by machine, attached to the bimetal together and cut through.

14. Thermal bimetal according to claim 7, characterized in that the tapered wires and the bimetal body consist of one piece, for example by being produced by etching off the bimetal.