Search International and National Patent Collections

1. (WO2001035059) DEVICE FOR THE OPTICAL DETECTION AND MEASUREMENT OF LINEAR MOVEMENTS

Pub. No.:    WO/2001/035059    International Application No.:    PCT/IB2000/001092
Publication Date: Fri May 18 01:59:59 CEST 2001 International Filing Date: Sat Aug 05 01:59:59 CEST 2000
IPC: G01D 5/347
Applicants: BALLADO INVESTMENTS, INC.
AMMANN, Beat
Inventors: AMMANN, Beat
Title: DEVICE FOR THE OPTICAL DETECTION AND MEASUREMENT OF LINEAR MOVEMENTS
Abstract:
A description is given of a device (1) for the optical detection and measurement of the linear movements of a body (2) in the direction of its axis (Z-Z), comprising a surface (3), integral with the body (2) which makes the said movements, carrying a scale (8) formed by a plurality of equidistant parallel ribs (4n) arranged perpendicularly to the direction of the movements to be detected, and a fixed reading head (7) capable of detecting the number of ribs (4n) which pass through its reading field in both directions, characterized in that the said surface (3) is the external surface of a solid of revolution (5) coaxial and integral with the said body (2), the said ribs (4n) forming circumferences lying on parallel planes perpendicular to the axis of the aforesaid solid of revolution (5).