Patent ID: 8035371

Claim:
A measuring system for detecting a rotary-linear displacement of a shaft, said measuring system comprising: a linear sensor detecting a linear displacement of the rotary-linear displacement; a rotary sensor detecting a rotary displacement of the rotary-linear displacement, said rotary sensor being a hollow-shaft sensor having an interior for accommodation of the second measuring section; and a decoupling device decoupling the rotary displacement from the linear displacement of the rotary-linear displacement, said decoupling device including a first measuring section which is coupled linearly in a fixed manner to the shaft to be measured and read by the linear sensor, and a second measuring section which is coupled in a rotationally fixed manner to the shaft to be measured and read by the rotary sensor, wherein the coupling of one of the measuring sections to the shaft is exclusive, wherein the decoupling device has a linear spherical liner received in the hollow-shaft sensor and having a surface to define the second measuring section.