Device for monitoring yarn motion on a textile machine
US4349784A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1980 |
| Grant date | Sep 14, 1982 |
| Priority date | — |
| Expiry date | Jun 23, 2000 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H13/1633
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An electronic circuitry for evaluating electrical sensing signals furnished by a sensing device responsive to ballooning motion of a yarn in a textile machine and delivering a series of high frequency pulses having a repetition rate corresponding to the low frequency of the ballooning motion, comprises a series arrangement of an A.C.-amplifier, a rectifier, a low-pass filter having an upper cut-off frequency smaller than said high frequency but greater than the low frequency of the ballooning motion, and a frequency discriminator made up of a high-pass filter and integrator, and a final stage to either indicate improper yarn ballooning or disable the machine operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.