Textiles: weaving – Stopping – Weft
Patent
1988-12-28
1990-07-24
Falik, Andrew M.
Textiles: weaving
Stopping
Weft
139452, D03D 5134
Patent
active
049429094
ABSTRACT:
A device for detecting weft yarn breakage is adapted to be positioned upstream of a weft yarn feeding and storage device, and comprises a signal generator which directs the stoppage of the loom after a predetermined delay time T has elapsed from the moment at which weft yarn breakage is detected. The device comprises an electronic circuit including components which receive signals representative of the speed of the motor shaft and detection of weft yarn breakage. In one embodiment, the motor speed signal is fed to a counter-divider upon detection of weft yarn breakage, which in turn generates a signal after a time inversely proportional to the motor speed. This signal can be fed to a monostable circuit which generates the pulse for stopping the loom, the delay time T being in relation to the detected speed of the motor of the weft yarn feeding and storage device.
REFERENCES:
patent: 4041985 (1977-08-01), Gotoh
patent: 4051871 (1977-10-01), Vella
patent: 4095621 (1978-06-01), Kakinaka
patent: 4326564 (1982-04-01), Teixeira et al.
patent: 4556088 (1985-12-01), Tanaka et al.
patent: 4617971 (1986-10-01), Hellstroem
Falik Andrew M.
Roj Electrotex S.p.A.
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