Device for stopping the supply to a spinning frame drawing system in case of absence of yarn at the outlet
AssigneeN. Schlumberger & Cie
InventorC. Henri Genevray
Life of this patent
Estimating the term…
Abstract
A device, to be incorporated in a spinning frame and including supply rollers for the input of a sliver, a sliver control and drawing station for transforming said sliver into a yarn, and a yarn winding outlet station, comprises on the one hand, between the control and drawing station and the yarn winding outlet station, detector means for detecting the presence of the yarn, and, on the other hand, sensitive means responsive to said detector means for stopping the sliver feed by the supply rollers in case of absence of yarn as detected at the outlet.
Claims11
A spinning frame apparatus comprising:
- first and second supply rollers, said supply rollers having an engaged position in which said supply rollers are engaged in pressure contact to feed sliver and having a disengaged position in which said supply rollers are relatively displaced to prevent feeding of sliver, one of said supply rollers supported by a member which is spring biased toward a disengaged position of said rollers;
- means for overcoming said spring biasing comprising a traction spring, said overcoming means having an active position in which said traction spring generates a force opposing said spring biasing of said member to maintain said engaged position, and having an inactive position in which said traction spring generates a force in cooperation with said spring biasing of said member to maintain said disengaged position;
- means for transforming sliver fed from said supply rollers into yarn;
- means for detecting the presence of yarn output from said transforming means;
- and
- means responsive to said detecting means for relatively displacing said first and second supply rollers, said responsive means comprising:
- an arm connected to said means for overcoming, and means for controlling said arm to move said overcoming means into said inactive position in response to the failure to detect yarn by said detecting means.
A spinning frame apparatus comprising:
- first and second supply rollers, said supply rollers having an engaged position in which said supply rollers are engaged in pressure contact to feed sliver and having a disengaged position in which said supply rollers are relatively displaced to prevent feeding of sliver;
- means for biasing said rollers into said engaged position or said disengaged position, said biasing means comprising a traction spring, said biasing means movable between an active position in which said traction spring biases said supply rollers into said engaged position, and having an inactive position in which said traction spring biases said supply rollers into said disengaged position;
- means for transforming sliver fed from said supply rollers into yarn;
- means for detecting the presence of yarn output from said transforming means;
- and
- means responsive to said detecting means for relatively displacing said supply rollers, said responsive means comprising:
- an arm connected to said biasing means, and means for controlling said arm to move said biasing means into said inactive position in response to the failure to detect yarn by said detecting means.
Dependencies are inferred from the claim text.