Thread or yarn monitor for textile machines
AssigneeZellweger Luwa AG
InventorPeter Mueller
Life of this patent
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Abstract
The thread monitor serves to detect the passage in a textile machine of a thread (F) moving in a direction transverse to the thread length. The monitor contains a pivoting member (B) which can be actuated by the thread and a sensor (7) monitoring the actuation of this pivoting member. The pivoting member (B) is designed in such a way that, during the passage of the thread, the pivoting member (B) is deflected from its rest position and then returned into its rest position, the sensor (7) being designed for detecting this return. The pivoting member (B) is elastic and in one-piece and the sensor (7) is sensitive to pressure. The monitor may be used in thread storage means and thread-transfer devices, particularly those in weaving and in warp-thread preparation apparatus.
Claims11
An apparatus for monitoring an elongated thread having a portion which is movable along a path extending in a direction at an angle to the lengthwise dimension of said thread for detecting the movement of said thread portion along said path over a predetermined location in a textile machine, comprising a deflectable member biased toward a rest position in the path of movement of said thread portion, said deflectable member being deflected from and returned to said rest position during movement of said thread portion along said path, and pressure sensitive sensor means for determining movement of said thread portion over said predetermined location by detecting pressure applied by the deflectable member when the deflectable member returns to the rest position, said deflectable member being movable relative to said sensor means and being mounted in a position such that said sensor means is contacted by said deflectable member when said deflectable member returns to said rest position to detect the return of said member to said rest position after the movement of said thread portion over said predetermined location.
A thread monitor for detecting movement of a thread past a fixed point, said monitor having a deflectable member which is actuable by the movement of the thread, and a pressure sensitive sensor monitoring the actuation of said deflectable member by detecting pressure applied to the sensor by the deflectable member, wherein said deflectable member is flexible and of one-piece design so that, during the movement of the thread past said fixed point, the deflectable member is deflected relative to the sensor from a first position and then returned into said first position, and said sensor determining that the thread has moved past said fixed point by detecting pressure applied to the sensor by the deflectable member upon said return of said deflectable member to said first position.
Dependencies are inferred from the claim text.