Abstract: A mechatronic device comprising a housing that encompasses a mechanical part and an electronic part is provided. The mechanical part includes one or more solenoid valves and pressure-directing ducts. The electronic part includes a printed circuit board with electronic components. Sensor modules are incorporated in the pressure-directing ducts to measure physical parameters. In order to minimize electrical connections and separate seals for the sensor modules, the sensor modules wirelessly communicate with at least one reading station located on the circuit board by means of radio technology or light-emitting and light sensitive elements.

Abstract: A mechatronic device comprising a housing that encompasses a mechanical part and an electronic part is provided. The mechanical part includes one or more solenoid valves and pressure-directing ducts. The electronic part includes a printed circuit board with electronic components. Sensor modules are incorporated in the pressure-directing ducts to measure physical parameters. In order to minimize electrical connection and separate seals for the sensor modules, the sensor modules wirelessly communicate with at least one reading station located on the circuit board by means of radio technology or light-emitting and light sensitive elements.

Abstract: A string tensioning system is provided for ball rackets, in particular for tennis rackets and squash rackets. The string tensioning system, formed by a string tensioning member (1), is insertable between the substantially parallel disposed strings (2 to 7) of a ball racket (19) such that these substantially parallel disposed strings are lifted up and down, respectively, relative to their original common plane and relative to each neighboring string of a parallel direction. Thereby the strings are retensioned and the original stringing hardness is recovered.

Abstract: A gas-blast circuit breaker has a plurality of serially arranged circuit breaking stations per pole and a tubular throughgoing stationary casing of electrically insulating material enclosing the circuit breaking stations. Each circuit breaking station has a stationary contact affixed to the casing, a movable contact cooperating with the stationary contact, a movable nozzle of insulating material and a gas pressurizing piston-and-cylinder arrangement. Each such arrangement has an outer cylindrical wall structure, a piston slidable therein and a stationary component affixed to the casing and forming a radial cylinder base. Each outer cylindrical wall structure is constituted by a length portion of the casing. Each piston-and-cylinder arrangement has an inner wall structure spaced from the casing. The inner wall structures each constitute a guide for slidably supporting the movable contact for axial displacement with respect to the inner wall structure.