Thread monitoring switch for textile machines having magnet biasing lever to prevent any annoying thread flutter
US4075445A · kind A · utility
12Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1976 |
| Grant date | Feb 21, 1978 |
| Priority date | — |
| Expiry date | Apr 14, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/31
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A filament supplied to a textile machine is held under tension by a thread mounted on a weighted or otherwise biased lever which trips a switch to arrest the machine upon rupture of the filament. In normal operation, the lever is held against a stop by the tension of the thread supplemented by the force of a magnet whose attraction diminishes rapidly over the swing range of the lever, the biasing force slightly exceeding the magnetic force in the normal lever position to prevent oscillations in response to minor fluctuations in filament tension but to initiate a rapid cutoff in the event of a break.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.