Cross-coil moving-magnet measuring instrument

A crossed-coil moving-magnet measuring instrument having an approximately cylindrical core developed as winding form, the instrument further comprising a first coil and a second coil wound about the core and disposed respectively in a first plane and a second plane which are perpendicular to each other and parallel to an axis of the core, on which core the first coil and the second coil are wound crossed one over the other, the second coil passing in the regions of ends of the winding form over the first coil and thus having a greater height of turn than the latter, there being mounted within the core a moving magnet having a pointer shaft brought out from an extension of the core, the measurement instrument further comprising

• spacing means disposed on the core for guiding turns of the coils alongside the extension of the core;
• the spacing means being arranged around the core in the first and the second planes;
• and wherein
• the core is asymmetric as viewed in a third plane being larger than a core diameter in the second plane by an amount equalizing the effect of magnetic flux of the first and second coils on the moving magnet.