Pulse-producing transducer

US4446367A · kind A · utility

Assignee

• Mannesmann AG · DE

Inventors

• Alfred Babsch · Blaustein, DE
• Gerhard Lohrmann · Thalfingen, DE

Key dates

• Filing date: Sep 16, 1981
• Grant date: May 1, 1984
• Expiry date: Sep 16, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G01P13/045
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A linear or annular optical grating cooperates with a detector unit having two detectors on the front face of a carrier member of rotational symmetry and being either directly rotatable through a rear-face screwdriver slot, or via a cam-operated lever, the cam being rotatable by screwdriver action. The two detectors are aligned along a diameter line of the carrier member and will produce two phase-shifted pulse trains upon relative movement between the detection unit and the grating. The preferred field of application is matrix printers, the grating defining print position.