Abstract: A turbine for a flowmeter includes pulse-generating elements which are distributed at specified angular intervals adjacent to a front wall of a wheel hub for measuring speed. The pulse-generating elements are housed in a pot-like, plastic container having a bottom that forms the front wall. A circumferential wall of the container and the pulse-generating elements, on a side thereof opposite the front wall, are sprayed with a plastic material.

Abstract: A calorimetric flow indicator includes a sensor element which forms a temperature-dependent resistance and which heats up in a short period of time by application thereto of electrical current. A resistance variation of the sensor element, induced by cooling, represents a measure of flow velocity of a medium flowing by the sensor element. The sensor element rests against an inner surface of a front wall of a housing projecting into the flowing medium. That section of the housing that includes the front wall and projects into the flowing medium has the shape of an obtusely truncated cone.

Abstract: In a relay station for use in a radio telephone network, which relay station includes a time storage unit composed of a time delay member connected to be switched, in response to recognition of a calling signal by its associated evaluator, from a reset state in which it is inactive to a set state in which it triggers emission of an identification signal after a delay period which is characteristic of the relay station and which differs from that of all other relay stations in the network, a member responsive to detection of such selective calling signal by its associated evaluator subsequent to recognition of a calling signal and prior to emission of a resulting identification signal for returning the time delay member to its reset state and preventing emission of that identification signal, and a member for automatically returning the time delay member to its reset state at the end of a time interval which follows recognition of a calling signal and is longer than the longest delay period characteristic of a