Weft thread monitoring device
US4155381A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Feb 2, 1978 |
| Grant date | May 22, 1979 |
| Priority date | — |
| Expiry date | Feb 2, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD03D51/34
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A weft thread monitoring device comprises a carrier element, such as a push rod, that is moved in one direction relative to the loom frame by beating-up motion of the reed and is biased in an opposite return direction. A feeler that is carried for bodily motion by the carrier element and is movable relative to it has a sensing arm that is engaged by a weft thread during beat-up and a controlled arm cooperable with an actuator for a cut-off switch. The feeler is biased relative to the carrier element towards an actuating position in which its controlled arm can engage the actuator during return motion of the carrier element and move the actuator to stop the loom. However, if the sensing arm is held captive by a properly laid and beaten-up weft thread, the feeler is maintained, against its bias, in a position in which the controlled arm clears the actuator during carrier element return motion, and at the conclusion of such return motion the sensing arm is snapped out of engagement with the weft thread.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.