together, as when breakage occurs, or, if there is lapping, they are
separated so as to make contact above. In any case, the current causes
the electro-magnet, S, against the side of the machine to move its
armature and set the stop motion in play.

Figs. 4 and 5 represent in detail the manner in which electric
connection is made in two cases requiring the intervention of the stop
motion. In Fig. 4 the upper part of a receiving can is shown. When
the can is full the cotton lifts the tube wheel, J, until it makes an
electrical connection, and the stop motion is brought into instant
action. In Fig. 5, the traction upon the yarn holds the hook borne by
the spring, F, away from G, and the electric circuit is interrupted. A
breakage of the yarn allows this spring to act; contact is made, and the
stop motion operates as before.

This simple and efficient device is exhibited by Howard & Bullough &
Riley, of Boston.


NEW POSITIVE MOTION LOOM.

Fig. 6 shows the essential features of a positive motion loom, intended
for weaving narrow fabrics, exhibited by Knowles, of Worcester, Mass.
The engraving shows so clearly how, by a right and left movement of the
rack, the shuttle is thrown by the action of the intermediate cogwheels,
that further description is unnecessary.

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