| 摘要 |
In an improved electromagnet structure for stopping the unwinding of the weft yarn in weft feeding devices for weaving looms, comprises-mounted in a casing-an electromagnetic coil and an armature mobile therein. The armature comprises a shank, at least partly constituted by a piece of stainless steel cable and a head of ferrous material fixed to the shank by rolling and/or plastic deformation. The head is urged, on activation of the coil, to strike against a stopping plate interposed between the casing and its closure cover, against the action of a return spring and by way of a damping washer carried by the plate.
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