Electrostatic weft detector
AssigneeSulzer Brothers Limited
InventorGodert De Jager
Life of this patent
Estimating the term…
Abstract
The weft break stop motion (1) detects without contact a potential displacement in the feeler (5a) effected by a weft thread moving past by means of a plate-like layered sensor element (2). With the feeler (5a) turned towards the weft thread insertion, the sensor element (2) can be introduced between the drop wires (23) of the reed (18). The weft break stop motion (1) and the sensor element (2) can be variably positioned along the reed (18), depending on the screen of the drop wires (23), and is normally placed directly outside the warp threads according to the loom width.
Claims20
Apparatus for sensing an electrical charge of a weft thread for installation on a loom, the apparatus comprising a plate-like sensor element defined by at least three layers of a conductive material and insulation material between and separating adjacent layers of the conductive material to thereby define a middle conductive layer and first and second outer conductive layers, means for grounding the outer conductive layers, and means for electrically coupling the middle conductive layer with means for registering an electrical potential, whereby an electric charge of the weft thread located in the vicinity of and spaced from the middle conductive layer can be sensed without physical contact between the weft thread and the middle conductive layer.
A loom comprising a detector for sensing an electrical charge of a weft thread inserted in the loom, the detector including a plate-like sensor element defined by at least three layers of a conductive material and insulation material between and separating adjacent layers of the conductive material to thereby define a middle conductive layer and first and second outer conductive layers, means for grounding the outer conductive layers, and means for electrically coupling the middle conductive layer with means for registering an electrical potential, whereby an electric charge of the weft thread located in the vicinity of and spaced from the middle conductive layer can be sensed without physical contact between the weft thread and the middle conductive layer.
Dependencies are inferred from the claim text.