Patent · US Expired

Apparatus for determining a reference position of a moving member

US4468666A · kind A · utility

1Cited by
5References
4Claims
0Family size

Assignee

Inventors

Key dates

Filing dateOct 7, 1981
Grant dateAug 28, 1984
Priority date—
Expiry dateOct 7, 2001

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01D5/36
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

The apparatus comprises a first marking element rigid with a disk rotationally driven in synchronism with the translation movement of the member and a detector which delivers an electrical signal upon the passage of the marking. The disk makes many complete rotations for the complete stroke of the member. A second marking element is rigid with the member and a second detecting device delivers an electrical signal upon the passage of the marking in front of the detector. The logic circuit C processes these two electrical signals so as to produce a signal 10 which gives the instant when the moving member passes through the reference position.

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