Leesona Corporation

Larry C Cowan

Charles W Brouwer

Karl W Wueger

Robert Horton

David T Guerin

In a loom of the type in which a weft strand is projected in free flying fashion from one side of a warp shed to the opposite side thereof and which includes a lay rockable between a weft projecting position and a beat up position, a reed fixed on the lay for beating up the inserted weft strand into the fell of the fabric being woven when the lay moves to beat up position, and a strand reception tube carried on the lay for receiving the free end of the projected weft strand proximate to such opposite side, the improvement of a support for the reception tube which permits bodily pivotal displacement of the reception tube toward and away from the reed while pivoting with the lay.

Weft end reception system

A monitoring unit for a fluid weft insertion loom monitors the yarn supply withdrawal.

Fluid weft insertion loom monitoring system

The admission of pressurized fluid into the weft insertion nozzle of a loom is detected by an electrical signal generating means arranged in the nozzle in communication with the fluid delivery passage through the nozzle, the generating means generating a signal indicative of such fluid admission and applying the same to a conductor extending to an exterior point for use in monitoring the proper operation of the loom. Preferably, the signal generating means is fluid pressure responsive, such as a piezoelectric crystal exposed to the fluid pressure in the nozzle passage.

An intermittently-operating strand delivery system having:

Strand delivery system

An improved solenoid actuated yarn clamp for controlling the flow of a moving strand of yarn particularly in conjunction with a fluid weft insertion loom. The improved clamp is double acting, being displaced positively between an operative yarn clamping position and an inoperative position releasing the yarn for further movement. The actuation of the clamp in both directions preferably occurs in two stages in which a relatively movable portion of the armature is first attracted into engagement with the energized solenoid, resulting in enhancement of the flux path of the solenoid, causing movement of the remainder of the armature. A preferred electronic circuit for regulating the actuation of the improved clamp is also disclosed which permits the adjustment of the clamping and nonclamping portions of the operative cycle of the clamp.

Yarn clamp

A monitoring system for a fluid weft insertion loom monitors the significant operative events of each weaving cycle of the loom, e.g. yarn supply withdrawal, insertion nozzle actuation and yarn end arrival, and indicates the occurrence of each such event, preferably in terms of the elapsed time of such occurrence from a fixed reference point of the loom cycle, for example front dead center. The indications of the relative timing of the occurrences of such events is preferably retained on corresponding visual displays until the successful completion of each weaving cycle or in the event of a defective cycle until the defect is corrected and the loom is restarted. Preferred individual sensing units for the respective significant operative events are also disclosed.

Growing community of inventors

York, SC, United States of America

Larry C Cowan