Method and apparatus for detecting the faulty operation of spinning units open-end spinning machines

US4246748A · kind A · utility

Assignee

• Schubert & Salzer · DE

Inventors

• Peter Artzt · Reutlingen, DE
• Gerhard Egbers · Reutlingen, DE
• Rolf Guse · Reutlingen, DE
• Sohrab Tabibi · Pfullingen, DE

Key dates

• Filing date: Feb 11, 1977
• Grant date: Jan 27, 1981
• Expiry date: Feb 11, 1997

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/365
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and apparatus of detecting faulty operations of spinning units of an open-end spinning machine by monitoring the faults appearing in the yarn being produced by the machine and generating a fault signal responsive thereto. Another speed responsive signal is produced responsive to the speed that the yarn is being delivered from the spinning compartment of the machine. The fault signal is fed to a variable gain amplifier which has its gain controlled by the speed responsive signal. The signal produced by the amplifier is then differentiated, shaped, and integrated. The integrated signal is, in turn, compared with a threshold value for determining when the faults in the yarn exceed a predetermined level.