Apparatus for stopping a takeup bobbin

Claim 2

Apparatus for stopping a bobbin adapted to be rotated by a drive shaft comprising a driving roller journaled on the drive shaft for rotation and axial displacement with respect thereto, the bobbin being mechanically coupled to the driving roller for rotation therewith, a first clutch member mounted on the drive shaft for rotation therewith, a second clutch member mounted on the driving roller for rotation therewith and operatively associated with the first clutch member, and magnet means mounted to prevent axial displacement with respect to the drive shaft and adapted to urge the second clutch member against the first clutch member for locking the first and second clutch members together.

Claim 3

Apparatus according to claim 1 wherein each of the first and second clutch members is formed with at least one ring of teeth, the teeth of the two clutch members meshing with each other when the clutch members are engaged.

Claim 4

Apparatus according to claim 1 including means for displacing the driving roller axialLy of the drive shaft in one direction to engage the first and second clutch members and in the opposite direction to disengage the first and second clutch members.

Claim 5

Apparatus for stopping a bobbin adapted to be rotated by a drive shaft comprising a driving roller journaled on the drive shaft for rotation and axial displacement with respect thereto, the bobbin being mechanically coupled to the driving roller for rotation therewith, a first clutch member mounted on the drive shaft for rotation therewith, a second clutch member mounted on the driving roller for rotation therewith and operatively associated with the first clutch member, means for locking the first and second clutch members together, and means for displacing the driving roller axially of the drive shaft in one direction to engage the first and second clutch members and in the opposite direction to disengage the first and second clutch members, the displacing means including a pair of spaced fingers mounted for movement together, each of the fingers being adjacent a different end of the driving roller, one of the fingers being adapted to engage the driving roller and displace it in the direction to engage the clutch members, and the other finger being adapted to engage the driving roller and displace it in the direction to disengage the clutch members.

Claim 6

Apparatus for stopping a bobbin adapted to be rotated by a drive shaft comprising a driving roller journaled on the drive shaft for rotation and axial displacement with respect thereto, the bobbin being mechanically coupled to the driving roller for rotation therewith, a first clutch member mounted on the drive shaft for rotation therewith, a second clutch member mounted on the driving roller for rotation therewith and operatively associated with the first clutch member, means for locking the first and second clutch members together, and means for displacing the driving roller axially of the drive shaft in one direction to engage the first and second clutch members and in the opposite direction to disengage the first and second clutch members, the displacing means including a pair of spaced fingers mounted for movement together, each of the fingers being adjacent a different end of the driving roller, one of the fingers being adapted to engage the driving roller and displace it in the direction to engage the clutch members, and the other finger being adapted to engage the driving roller and displace it in the direction to disengage the clutch members.

Claim 7

Apparatus for stopping a bobbin adapted to be rotated by a drive shaft comprising a driving roller journaled on the drive shaft for rotation and axial displacement with respect thereto, the bobbin being mechanically coupled to the driving roller for rotation therewith, a first clutch member mounted on the drive shaft for rotation therewith, a second clutch member mounted on the driving roller for rotation therewith and operatively associated with the first clutch member, means for locking the first and second clutch members together, means for displacing the driving roller axially of the drive shaft in one direction to engage the first and second clutch members and in the opposite direction to disengage the first and second clutch members, the second clutch member being mounted on one end of the driving roller, and stationary brake means adjacent the opposite end of the driving roller for engaging the driving roller and stopping the rotation thereof when the latter is urged thereagainst.

Claim 8

Apparatus for stopping a bobbin adapted to be rotated by a drive shaft comprising a driving roller journaled on the drive shaft for rotation and axial displacement with respect thereto, the bobbin being mechanically coupled to the driving roller for rotation therewith, a first clutch member mounted on the drive shaft for rotation therewith, a second clutch member mounted on the driving roller for rotation therewith and operatively associated with the first clutch member, means for locking the first and second clutch members together, means for displacing the driving roller axially of the drive shaft in one direction to engage the first and second clutch members and in the opposite direction to disengage the first and second clutch members, the second clutch member being mounted on one end of the driving roller, and stationary brake means adjacent the opposite end of the driving roller for engaging the driving roller and stopping the rotation thereof when the latter is urged thereagainst.

Claim 9

Apparatus according to claim 5 including means for biasing the displacing means in the direction for disengaging the clutch members and for urging the driving roller against the brake means.

Claim 10

Apparatus according to claim 6 including means for locking the displacing means to prevent the biasing means from driving the driving roller against the brake means.

Claim 11

Apparatus according to claim 7 wherein the locking means locks the displacing means in a neutral position in which each of the displacing fingers is disposed in spaced relation to the adjacent end of the driving roller when the first and second clutch members are engaged.

Claim 12

Apparatus according to claim 7 including means for displacing the displacing means against the force exerted by the biasing means in the direction for withdrawing the driving roller from the brake means and for engaging the clutch members.

Claim 13

Apparatus according to claim 7 wherein the bobbin is rotated to wind up a yarn fed thereto, and including means responsive to a predetermined condition of the yarn for releasing the locking means.

Claim 14

Apparatus according to claim 10 wherein the locking means includes a force reduction linkage to enable a relatively small force on the releasing means to release the displacing means when the biasing means exerts a relatively large force on the displacing means.

Claim 15

Apparatus according to claim 10 wherein the releasing means includes a feeler adapted to engage the yarn, a switch coupled to the feeler and adapted to be operated when the yarn assumes a predetermined disposition, and an electromechanical transducer adapted to be activated by the switch to release the locking means.

Claim 16

Apparatus according to claim 1 including a magnetizable element mounted on the driving roller, and wherein the magnet means includes a magnet mounted on the second clutch member and adapted to coact with the magnetizable element.

Claim 17

Apparatus according to claim 5 wherein the locking means includes a magnet mounted on one of the drive shaft and the driving roller, and a magnetizable element mounted on the other of the drive shaft and the driving roller, the magnet and the magnetizable element coacting to lock the first and second clutch members in engaged relation.