| 摘要 |
<p>The presence and absence of an inserted weft yarn are sensed respectively by, in moving a sensor body having an aperture opening externally of the body and two contacts located in the aperture and engaged with each other by an elastic force from a first position in which the inserted weft yarn is passed through the aperture during insertion into a second position in which the inserted weft yarn is taken out from the aperture by disengaging the contacts, sensing the contacts being disengaged and remaining engaged.</p> |
