Patent · US Expired

Probe assembly and circuit for measuring machine

US4780961A · kind A · utility

11Cited by
7References
40Claims
0Family size

Inventors

Key dates

Filing dateNov 10, 1986
Grant dateNov 1, 1988
Priority date—
Expiry dateNov 10, 2006

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01B7/002
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A probe assembly has a housing connected to the head of a coordinate measuring machine, a carrier movably connected to the housing, and a piezoelectric crystal mounted on the carrier. A stylus is mounted on the carrier. An electronic circuit receives signals from the crystal and, at an adjustable threshold value, the circuit provides output signals which are greater than and substantially simultaneous with signals from the crystal. A timer maintains the output signal for a time interval after the signal is produced by the crystal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.