US 4,763,699 AGranted

System of detection of shed closed to shuttle passage in multi-step textile looms

AssigneeNuovo Pignone Industrie Meccaniche e Fonderia S.p.A.

InventorsLuciano Corain, Gianni Maitan, Giulio Bortoli

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Abstract

System of detection of a shed closed to passage of a shuttle in a multi-phase weaving textile loom. This invention is comprised of the following: sensitive control bars made elastically movable along the vertical direction, with a stroke at least equalling the vertical shift necessary for the shuttle roller to disengage from the corresponding thrust roller of the dragging chain of the same shuttle; two adjoining sensitive control blades, both are on the rotary-reed facing divergent side wall of each shuttle; the outward blade is fixed and rigid while the longer inward blade is rotatable around a vertical axis; and upon detection of a persistent entanglement by the control blades, a lever pin, kept in a retracted position by a retainer hook, is freed by movement of the retainer hook such that the lever pin springs outwards to protrude from the shuttle plane, pressing upon a sensitive control bar, generating a stop loom signal.

Claims6

Dependent claims

A system for the detection of a shed closed by a persistent entanglement to passage of a shuttle in multiphase weaving type textile looms comprising:

(a) a plurality of shuttles, each shuttle being provided in its bottom portion with a roller;
(b) the roller of each shuttle cooperates with a corresponding thrust roller of a dragging chain;
(c) a plurality of control bars that guide said shuttles on their upper portion, said control bars and shuttles being elastically moveable along a vertical direction;
(d) two adjoining control blades, an inward rotatable blade and a shorter rigid and stationary outward blade, both located on a divergent side wall of each shuttle on a rotary reed-facing side thereof, wherein said inward control blade is maintained against the outward control blade by a spring;
(e) a rotatable lever pin held in a retracted position within each shuttle such that movement of the inward control blade upon engagement of a persistent entanglement frees the rotation of said lever pin, whereupon the lever pin protrudes from the shuttle, thereby pushing a corresponding control bar upwards;
and
(f) means operatively connected to the loom for converting the upward movement of said control bars into a loom stop signal.

4 more elements

Dependencies are inferred from the claim text.