Fig. 82.
Lines of Movement Necessary for Narrowing.
The explanation of this movement applies to all of the automatic movements for narrowing or fashioning on this machine. Inasmuch as all these irregular cams for the different movements are mounted on this same shaft 9, after once being set right they must always be in synchronism unless the setting is disturbed by accident. We have seen how the first movement is secured to bring the openings in the decker points down to a point directly over the needle hooks. We have assumed that they were in a line sidewise to begin with. Now we will see how the second movement, or bringing the deckers down on to the hooks of the needles after being moved directly over them, and lifting them off again, is accomplished.
Second and Third Movements
Referring to Fig. 77, it has been explained how the decker points with their clamp a and yoke are mounted on the rods b and c in such a manner that they will swing freely with the rod c acting as a pivot. Referring to Fig. 78, we find that the rods c and b have another yoke at i, which is attached securely to these rods, with a short extension toward the outside of the machine on which to attach the connection rod h.
If we now turn to Fig. 79, we will find that the connection rod h comes down and is attached at the other end to a lever at j. While, as the reader may surmise, the connection rod h, Fig. 78, is on the front of the machine, and the rod h, Fig. 79, is on the back, the connections and manner of moving are the same. The lever to which this connection rod h (Fig. 79) is attached at j is mounted on the shaft 13, so as to swing up and down freely, and has an extension on the other side of the shaft from which there is another rod connecting it with the inside end of lever 2.
This lever has the proper movements imparted to it through the pin and roller, which may be plainly seen, resting on the periphery of an irregular cam, just the same as has been explained for lever 1 for the first movement, except that the pin and roller rest on the top of the cam in this instance, while in the former case the pin and roller were held firmly up against the bottom of the cam by a coil spring.
The third movement to carry the loops in toward the center one needle, designated in Fig. 82 as 5, is a straight line movement and always in one direction. But the movement as to distance must be more exact than either of the others, therefore while the source of the movement is the same as the others, an irregular cam on the cam shaft 9, the transmission of it to the deckers is accomplished in an entirely different manner.
Fine Adjustment Necessary
We will refer again to Fig. 77, where we will find two long flat steel straps, one on each side of the machine, marked e and e. It will be noted that these straps are attached securely to the yokes that carry the deckers, as well as to the crossheads or bridges marked l and m. Reaching across from one to the other and attached to these bridges is a yoke the two arms of which are indicated by k and k. These two arms come together at the center in a hub through which runs the worm or screw indicated by g.