| 摘要 |
Inserted is each slit of the needle bed of this machine is a needle underneath which is placed a blade element that is provided with three butts, namely a first butt at the top, a second butt below, and a third butt at the bottom. The said third and last butt is carried by a tailpiece able to oscillate or undergo flexure, in contrast with elastic means, inside the corresponding slit. The selection of a blade element is defined by the operation of a selector element, integral with the carriage, whereby the first butt is intercepted causing the blade element to be raised from the neutral position. Through action exerted on the third butt by an operating cam, the blade element is raised further in cases when the selection operation is fully satisfactory; should this not be the case, as also when the blade element is in the neutral position, the cam acts as a guide for the said third butt in order to reach, or maintain, the said neutral position.
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