Chart recorder having review means

US5576740A · kind A · utility

Inventors

• Sean Keeping · Wegberg, DE
• John C. Emmerson
• David J. Claydon

Key dates

• Filing date: May 19, 1994
• Grant date: Nov 19, 1996
• Expiry date: May 19, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D15/24
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A chart recorder with the facility to automatically review recorded data on chart paper. This review feature is high speed and accurate, and is provided by a series of one way drive mechanisms. These mechanisms comprise of various spools, rollers and gears. The chart paper is transferred from spool to spool. A removable cassette houses these mechanisms. The cassette is juxtapositioned with a floating recording station. The mutual abutment of the cassette with the recording station ensures that the required tolerances between the chart paper and the pen head are achieved.