Abstract: A mixer for mixing air flows is provided that can include an air duct, which has at least one hot air duct and one cold air duct, wherein an air flow through the hot air duct and through the cold air duct can be controlled by a respective mixing flap. A heating element is arranged in the hot air duct in order to heat the air passing through the hot air duct. Furthermore, the mixer can include a mixing chamber, which is connected to an air outlet side of the hot air duct and of the cold air duct of the air duct such as to enable fluid flow. The mixing chamber can have air guiding elements, which are arranged in such a way that air flowing out of an air outlet side of the hot air duct crosses air flowing out of an air outlet side of the cold air duct.

Abstract: A mixer for mixing air flows is provided that can include an air duct, which has at least one hot air duct and one cold air duct, wherein an air flow through the hot air duct and through the cold air duct can be controlled by a respective mixing flap. A heating element is arranged in the hot air duct in order to heat the air passing through the hot air duct. Furthermore, the mixer can include a mixing chamber, which is connected to an air outlet side of the hot air duct and of the cold air duct of the air duct such as to enable fluid flow. The mixing chamber can have air guiding elements, which are arranged in such a way that air flowing out of an air outlet side of the hot air duct crosses air flowing out of an air outlet side of the cold air duct.

Abstract: A shower head has a housing having an end wall provided with a plurality of sets of spray nozzles, a partition element defining in the housing a pressurizable inlet chamber and formed offset from the axis with an axially throughgoing outlet hole, and a valve element rotatable in the housing on the partition about the axis, overlying the outlet hole, and formed offset from the axis with a plurality of axially throughgoing apertures radially equispaced from the axis and angularly spaced thereabout, selectively alignable with the partition hole, and each associated with a respective set of the nozzles. The housing also is formed with respective passages connecting the apertures with the respective sets of nozzles. One of the elements is provided with a restriction formation for progressive restriction of the outlet hole from a fully open to fully closed condition on rotation of the valve element through a predetermined angular stroke.

Abstract: A device for the vertical stacking of successively fed coins or similar disk-shaped articles, including a coin carrier connected to a continuously revolving conveyor belt and receiving the stack of coins while capable of being lowered in a stacking space of a coin packing machine in synchronism with the growing stack. The coin carriers are formed by an L-shaped finger whose first shank protrudes horizontally into the stacking space while its second shank is so connected with a pair of continuously revolving conveyor belts that the conveyor belts, based on the longitudinal axis of the second shank, attach on two mutually offset, lateral articulated axles. The continuously revolving conveyor belts run along trajectories which correspond to the spacing of the width of the second shank and are parallel to each other while in the vertical stacking direction they are mutually offset in accordance with the spacing of the lateral articulated axles.

Abstract: A process for adding water to a concrete mix wherein, after addition of an initial quantity of water to bring a particular concrete mix to or close to a so-called zero consistency, the set point consistency is reached by the one-shot addition of the balance of the water determined from stored empirical and interpolated data based upon measuring consistency and water addition values. The method has the advantage that the establishment of a zero value consistency by the addition of water to the dry mix or a mix of unknown moisture content permits the consistency measurement at this point to be easily carried out by indirect electrical techniques.

Abstract: A method of and an apparatus for controlling the water added to concrete batches wherein for a given concrete recipe and batch size, while mixing same, a series of empirical values of water quantity and consistency of the resulting mix are determined by initially feeding a quantity of water to the batch reduced by an amount equivalent to the moisture content of the aggregates of the batch at maximum intrinsic moisture content and thereafter incrementally adding water while measuring the consistency after each water addition, and these values are stored for the respective recipe and batch size. For the addition of water to a further batch of the recipe, while mixing the further batch, an initial quantity of water is added to the further batch which is not reduced by the quantity of water equivalent to the moisture contents of the aggregates and the consistency of the further batch after the initial addition of water thereto is measured.