Means for controlling the travel of a yarn in a textile machine

US5301887A · kind A · utility

Assignee

• W. Schlafhorst AG & Co. · DE

Inventors

• Ulrich Wirtz · Mönchengladbach, DE
• Andreas Kruger · Donaurieden, DE

Key dates

• Filing date: Sep 30, 1991
• Grant date: Apr 12, 1994
• Expiry date: Sep 30, 2011

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2701/31
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A heat sensor which detects the heat generated from sliding frictional contact with a traveling yarn in a textile machine and generates control signals therefrom for the controlling of a yarn winding operation. A temperature-sensitive electric resistor, especially a thin-layer resistor or a film thermometer, serves as the heat sensor. The heat sensor is connected e.g. via a signal converter to control devices, e.g. to a controllable yarn brake and/or to a drive motor for yarn take-up. When the measured temperature rises above a limit value, the braking force of the yarn brake can be first lowered and then the speed of the drive motor can be reduced.