Abstract: The dispenser has a circular mixing chamber (8) which is arranged immediately in front of a mixing nozzle (7). A first channel (15) leads to the mixing chamber (8) which is connected with a rising pipe which is immersed in the filled material of a squeezable container. Simultaneously, a second channel (9) leads into the mixing chamber which is connected to the air space above the filled material. A sieve arranged in the outlet channel (19) at a distance after the mixing nozzle which completely covers the outlet channel under the effect of the pressure of the filled material flowing out when the container (1) is squeezed. With release of the container, the sieve partially releases the outlet channel under the suction effect of the air return flow. With that, the container is rapidly ready for a renewed press sequence.

Abstract: When the container is compressed, liquid flows via a riser (2) and an inflow channel (10) tangentially into a vortex chamber (9), where a rotary flow is induced. The liquid is accelerated by the conical cross-section of the inner wall (5) of the liquid nozzle (1) until it is discharged from the orifice (7) of the liquid nozzle (1). At the same time, air from the container flows via an inflow channel (11) into the annular chamber (3) which surrounds the liquid nozzle (1). Coaxial with the liquid nozzle there is a mixture nozzle (4) with a conical inner wall (5'). The orifice (7) of the liquid nozzle (1) is retracted relative to the orifice (8) of the mixture nozzle (4), so that the two media are jointly accelerated after mixing.

Abstract: A device for measuring the density of fluids comprises two float elements of unequal density distribution pivotally mounted on a common axis about which they rotate in opposite directions with change of density of the fluid in which they are immersed. The density is indicated by the position of an index carried by one element relative to a scale carried by the other element. Scale range is increased and scale linearity is improved by having the elements respond respectively differently to density changes in the upper and lower density ranges. Temperature compensation is effected by the choice of materials for the float elements relative to the thermal expansion characteristics of the fluid, and by the manner in which the relatively more dense and relatively less dense portions of each float element are mounted with respect to the axis.

Abstract: For measuring the density of fluids whose densities lie within a predetermined range and whose coefficients of thermal expansion vary within this range, a stem hydrometer has a lower body volume which extends up to the lowest marking on the density scale and is immersed when the hydrometer is buoyant in a fluid at the highest part of the density range, a scale volume which extends between the lowest and highest markings on the density scale and is immersed with the body volume when the hydrometer is buoyant in a fluid at the lowest part of the density range, and a stem volume above the highest scale marking. The body volume has a coefficient of expansion substantially equal to that of the fluid at the highest part of the range, and the scale volume is comprised of material such that the coefficient of expansion of the combined body volume and scale volume is substantially equal to that of the fluid at the lowest part of the range.