Inductive transducer for converting the linear stroke movements of a sensor of mechanical measuring instruments into electrical measurement signals

For converting the linear stroke movements of a sensor of mechanical measuring instruments into electrical measurement signals, an inductive transducer is provided, the rod-shaped iron core 1 of which is connected to the sensor of the relevant measuring instrument and is axially carried inside two primary coils 2,3 arranged at a distance from one another. Furthermore, one or more coaxially arranged secondary coils 4,5 are provided and all coils are located in a return-path shell 6 of ferromagnetic material. The primary coils 2,3 fed with alternating voltage are polarised in opposite directions.; To simplify the structure of the inductive transducer whilst maintaining high linearity, and to improve assembly and disassembly, the length b of the rod-shaped iron core 1 is greater than the sum of the axial distance a of the primary coils 2,3 and the maximum stroke length and the length c of the return-path shell 6 is greater than the sum of the length b of the iron core 1 and the maximum stroke length. The single-layer coils can be constructed as saddle coils and the return-path shell can have the form of two half shells