초록 ▼

Measuring apparatus comprises a probe having a stylus supported on a housing by a spring extending in a plane transverse to the axis of the stylus and allowing the stylus to pivot about a center lying on the axis and to move linearly in the direction of the axis. A sensor has fixed and movable parts

Measuring apparatus comprises a probe having a stylus supported on a housing by a spring extending in a plane transverse to the axis of the stylus and allowing the stylus to pivot about a center lying on the axis and to move linearly in the direction of the axis. A sensor has fixed and movable parts off-set from the axis, the movable part being connected to the stylus by a transverse arm. The sensor senses both pivotal and axial movement, the pivotal movement corresponding to movement of the work-contacting end of the stylus transverse to the axis. At least one further sensor is provided to sense at least the axial movement of the stylus. An electrical network responsive to both sensor outputs is arranged to discriminate between transverse and axial movements of the stylus. Alternatively the sensors are arranged to give a single output for any movement of the stylus.

대표청구항 ▼

Apparatus for measuring displacement in at least two orthogonal dimensions comprising a support, a stylus connected to said support for displacement from a rest position pivotally about a center and linearly along an axis containing said center, a first and a second sensor each having a first compon

Apparatus for measuring displacement in at least two orthogonal dimensions comprising a support, a stylus connected to said support for displacement from a rest position pivotally about a center and linearly along an axis containing said center, a first and a second sensor each having a first component secured to the support and a second component secured to the stylus, said second components being movable relative to the respective first components in the direction of said axis when the stylus is displaced axially, said first sensor being offset from said axis whereby said second component of said second sensor is moved axially also when said stylus is moved pivotally, said first and second sensors having outputs which are zero when said stylus is in said rest position; the outputs of each said sensor being of opposite sign with respect to displacement of said stylus pivotally from said rest position, the respective outputs of said first and second sensors being of opposite sign when said stylus is displaced axially from said rest position, means for adding the output of said second sensor to the output of said first sensor whereby during axial displacement of said stylus the output of said second sensor, being of opposite sign, is cancelled from the output of said first sensor and the outputs of said first and second sensors are discreet indications of said pivotal and linear displacements, respectively.