Abstract: A vacuum toilet system comprises a plurality of toilets, a collecting tank, a conduit system that connects the plurality of toilets with the collecting tank, and a vacuum generator that is connected in a fluidic manner to the collecting tank. The conduit system further comprises a main duct and a plurality of branch ducts, via which the plurality of toilets are connected to said main duct and which discharge into the main duct at an acute angle formed with a component that is pointed in a delivery direction in the main duct, wherein the branch ducts describe curved sections adjacent to a respective inflow thereof having a curvature mid-point of a respective mid-line of the curved sections of the branch ducts being located behind a respective inflow point of a center line in the main duct with regard to the delivery direction in said main duct.

Abstract: A vacuum toilet system for a vehicle, notably a passenger aircraft, comprising a plurality of toilets (1), a collecting tank (4), a duct system (3) which connects the toilets (1) with the collecting tank (4) via one flush valve (2) per toilet, a vacuum generator (5) which is connected to the collecting tank (4) in a fluidic manner, a flush water tank (8) and a flush water system (9), which connects the toilets (1) via one flush water valve (10) each and/or via a flush water pump with the flush water tank (8). A flush control (11) which acts on the flush valve (2) and the flush water valve (10) or flush water pump of the individual toilets (1) and can be actuated via an actuating means (12) assigned to the toilet. A standard flush program is stored in said control.

Abstract: Method and apparatus for measuring conditions affecting susceptibility of a surface to ice formation, as for an aircraft. Detection surfaces are provided with cooling and heating elements. At least a portion of a detection surface is cooled below the ambient to cause ice to form. The temperature of ice formation and the time required for ice to build up provide measures of the risk of icing.

Abstract: An apparatus for mixing a first liquid component with at least one additional liquid component. A fluid flow-through measuring device in the form of a gear pulser is connected to a supply line for a first component and generates a number of electrical pulses corresponding to the flow volume. A geared feed pump connected to the supply line for each additional component is driven by an electric stepping motor. A current supply circuit for each stepping motor operates to maintain an adjusted mixing ratio in response to pulses generated by said flowthrough measuring device.

Abstract: An accelerometer having an electromagnetic spring for restraint of an axially movable accelerator mass. The spring comprises at least one magnetic field transverse in direction to that of the mass and at least one conductor in the field, carrying current, for generating a restoring force during relative movement between the field and the conductor, the force being varied by varying the current flow to the conductor. A positive indicator comprises a first winding fixed mechanically to the mass and a second winding fixed to the casing of the accelerometer. The first winding carries a-c and the second winding receives an induced a-c signal with amplitude proportional to the acceleration, its phase position indicating the direction of acceleration.

Abstract: A spring system has an adjustable spring force and includes at least one magnet. The magnet has a magnetic field, and at least one conductor passing direct current is disposed in the magnetic field. The magnet is formed by a number of pole pairs disposed along the path of displacement of the conductor, and each of the pole pairs encloses an air gap; the current-carrying conductor is a wire.