Weather hat

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Weather hat to Agricola

A weather hat is a technical construction that is attached to an opening in the mine . The weather hat is supposed to catch the natural draft and direct it into the mine building. Weather hats were only used in small mines where there were only a few and short distances from the shaft .

Structure and use

The weather hat consists of a conical box made of wood or sheet metal . This case is such a in the shaft built Lutte mounted such that it can guide the air flows generated by the wind into the mine. So that the weather hat is always in the wind direction, it can be rotated on the axis. So that the weather hat can turn automatically with the wind, a stiff wooden or sheet metal flag has been attached to the shafts of some mines on top of the weather hat. Usually the weather hat acts as a weather blower. There are also weather hats that are designed to turn like a weather vane in the opposite direction to the direction from which the wind is coming. As a result, the wind blows across the weather cap. The penetration of the external draft into the opening of the duct is thus prevented. The weather hat now acts as a weather vacuum.

Individual evidence

  1. ^ Moritz Ferdinand Gätzschmann: Collection of mining expressions. Second significantly increased edition. Verlag von Craz & Gerlach, Freiberg 1881
  2. a b c d Gustav Köhler: Textbook of mining science. Second improved edition. Published by Wilhelm Engelmann, Leipzig 1887
  3. a b c Explanatory dictionary of the technical terms and foreign words that occur in the mining industry, in metallurgy and in salt works. Falkenberg'schen Buchhandlung publishing house, Burgsteinfurt 1869