DE162613C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The essence of the trigger mechanism described in the main patent consists in that the sliver is very close to the needles of a drafting device or a comb a pair of pliers is grasped and removed. There are wandering rods used for this purpose grab the tape in pairs like pliers and move with it to get after delivery same again to the needle bars

0. Like. To return.

Instead of two rows of loose, in the form of needle bars a quadrangle movement exporting rods AA ¹ is according to the present invention, a single clamp rod pair AA ¹ is provided, whose movement is caused positively by a lever mechanism together with the cam plate. The back and forth movement of the bars A and A ¹ between the rollers N and 2V ¹ and the needle bars S ο. The like. Is caused by the fact that they BEZW on both sides at the front ends of levers B. B ¹ , which jointly engage with the rear ends on a lever C, which is set in oscillating motion by a cam disk G acting on a sliding roller H and seated on a shaft O in cooperation with a tension spring acting at K. The levers BB ¹ together with the rods AA ¹ form a pair of pliers. The opening and closing of these pliers is done by mediating special on the levers B and B ¹ attacking links D BEzw. D ¹ , which on the other hand are mounted on pins FF ¹ of levers EE ^1. These are in turn held in contact with the cam plate G ^{by the springs acting at P and P 1} using sliding rollers J and J ¹ and set in oscillating motion when the cam plate rotates, whereby the clamping rods are alternately pressed together and removed from one another. The cam has the same thumbs i, 2, 3, 4 ... with front curves of the same radius of curvature, arranged at the same intervals on a base circle. The starting curves of the thumb are flatter than the sequence curves, so that the return stroke of the pliers AA ^{1 is} faster than the working stroke. The sliding rollers HJJ ¹ are also arranged around the cam G that the rollers JJ ^{1 are} always in the transition curves, while the roller H is in contact with a front curve part, so that the opening and closing of the pliers takes place during their standstill. It should be noted, however, that the opening can begin a little before the end of the working stroke and this can begin before the pliers are completely closed. The main thing is that there is never a stroking effect in the direction opposite to that of the movement of the tape. In the position illustrated in the drawing, the pliers have just completed one working stroke, the roller H rests on the front curve of the thumb 3, the rollers / and J ¹ being

Claims (5)

entered the thumb gaps via the arched side curves of the thumbs 4 and 1 that support them and accordingly the pliers have opened to a certain extent. As a result, the tongs initially open completely while they are stationary. Then the roller H comes to the flat side curve of the thumb 3, while the rollers / and J1 rest on the smallest circle of the disk G, so that the pliers move back quickly with the same opening. While the pliers then stand still near the needle bars, because the roller H has reached the smallest circle of the disk G, the clamping rods are pressed together by the action of the arched side curves of the thumbs 5 and 2 on the rollers J and J1 to now return to to persist this mutual position until the roles JJ1 again on the back of the thumb 5 respectively. 2 slide down after the pliers have now completed an operation from the needle bars to the rollers by the action of the start-up curve of the thumb 4. It is necessary that the bars A A1 grip the tape with resilient pressure. For this purpose, one link D is elastically connected to its lever E1. In the embodiment shown, it is provided at the end with a longitudinal slot in which the bearing for the pin F1 can be displaced with the support of a spring R. The pull of the lever is thus transmitted to the handlebar D and thus to the rod A1 through the intermediary of the spring R, so that the sliver is clamped with elastic pressure. In order to take account of the interrupted feed of the sliver by the tongs, the rollers N N1 are also rotated intermittently. A rear derailleur consisting of ratchet M and ratchet L, the latter ζ, is used for this purpose. B., as shown, can be mounted on the lever B1 so that the circuit always takes place simultaneously with the forward movement of the pliers. Godfather ν τ-An Proverbs: 1. Pull-off device for needle bar. Like. Stretching, combing machines, etc. according to patent 157030, characterized in that the sliver is pulled off by a single pair of rods (AA ¹ ) forming the jaws of a pair of pliers, which grips the sliver behind the last needle bar, releases it again in front of the take-off rollers and returns open to the needlework when the work rolls are at a standstill (NN ^l ). 2. Trigger device according to claim 1, characterized in that the pliers are moved back and forth and closed and opened by special lever mechanisms moved by a cam disc (G). 3. Pull-off device according to claim 2, characterized in that an elastic member (spring R) is switched on in the opening and closing movement of the lever mechanism (E ¹ D) causing the pincer jaw so that the sliver is detected with resilient pressure. 4. Trigger device according to claim 1, characterized in that the pliers leading to the decline curves of the cam (G) are steeper than those coming into effect during the operation in order to achieve a rapid decline and increase the performance. 5. Pull-off device according to claim I, characterized in that the interrupted drive of the pull-off rollers (NN ¹ ) is effected by a switching mechanism, the pawl (L) of which is mounted on one of the pliers legs (B ¹ ). 1 sheet of drawings.