Textiles: manufacturing – Warp preparing or handling – With means responsive to sensed condition
Patent
1989-10-30
1990-06-26
Schroeder, Werner H.
Textiles: manufacturing
Warp preparing or handling
With means responsive to sensed condition
200 6118, B65H 6300, D02H 1312, F26B 1312
Patent
active
049359991
ABSTRACT:
Apparatus for detecting tight ends in a sheet of yarns of an associated yarn processing machine comprises an elongate channel extending transversely below the yarn sheet and having an upper open side. A multiplicity of sensing fingers having upwardly bowed central portions and projecting end portions are retained in the open side of the channel by flanges engaging the end portions of the fingers. A resilient strip or inflated tube engages a first end portion of each sensing finger to press the end portions of the sensing fingers up against the respective retaining flanges. The yarn sheet passes over the sensing fingers and, on both sides of the channel, is held down by guide bars which are lower than the sensing fingers. If tension on a yarn exceeds a predetermined value, such yarn presses the finger or fingers that it engages down to bring the second end portions into engagement with an electrical contact strip which constitutes a switch element in an electrical circuit comprising a signal light and a relay for stopping the associated yarn processing machine. In one embodiment, the contact strip is divided into sections which are insulated from one another and the electric circuit includes an LED connected with each section of the contact strip so as to indicate the approximate location of a tight end in the yarn sheet.
REFERENCES:
patent: 3429146 (1969-02-01), Cvach
patent: 4571582 (1986-02-01), Walter
Burns Robert E.
DeSandro Bradley K.
Lindly & Company, Inc.
Lobato Emmanuel J.
Schroeder Werner H.
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