Electromagnetic device for automated jacquard machine needle actuation
AssigneeDentelles Darquer
InventorFranck Duhamel
Life of this patent
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Abstract
An electromagnetic device for controlling the needles of a Jacquard machine is provided. The electromagnetic device selectively actuates the needles of a Jacquard machine using solenoids. The solenoids control selector members and place them either in a deployed position or a withdrawn position. When the device is moved with respect to the needles of a Jacquard machine, those selector members that are in the deployed position engage pushers to move the associated needles.
Claims13
A Jacquard machine having a device for automated actuation of needles of the Jacquard machine, the needles being arranged in parallel consecutive rows having a spacing between the rows, the device, being adapted to be moved in each cycle of the Jacquard machine with respect to the needles to push the needles individually and selectively and employing, for each needle, at least one of a plurality of selector members which are adapted to move in a direction that is transverse to a direction of pushing of the device between a first, selection, position and a second, withdrawn, position, and wherein movement between the two, selection and withdrawn, positions can be controlled electromagnetically in such a way that as the device moves, the device pushes only those needles of the Jacquard machine which are associated with a selector member that is in the selection position, wherein the device comprises a number of parallel plates spaced apart in pairs at a spacing which is adapted to be the same as the spacing separating two consecutive rows of needles, and wherein the selector members associated with the needles of the same row are mounted in the space between two consecutive plates, the selector members being adapted to move in a plane parallel to a plane of the plates, wherein for each selector member, there is a two-part electromagnetic circuit allowing the creation of at least one induced electromagnetic field which is oriented so that it is transverse to the plane of the plates, the two parts of the electromagnetic circuit being mounted, one on each opposing face of two plates and comprising, respectively, a wound main part with at least two opposite electromagnetic polar ends, and an armature for closing the electromagnetic field, the armature being positioned opposite the wound main part, each selector member comprising a magnetized part which is positioned between the two parts of the associated electromagnetic circuit, so as to allow movement of the selector member to be controlled.
In combination:
- a Jacquard machine having needles arranged in parallel consecutive rows, each row having a spacing therebetween;
- and
- a device for automated actuation of the needles of the Jacquard machine, the device being adapted to be moved with each cycle of the Jacquard machine with respect to the needles to push the needles individually and selectively, the device comprising:
- a number of parallel plates spaced apart in pairs at a spacing adapted to be the same as the spacing separating two consecutive rows of needles in the Jacquard machine;
- a plurality of selector members mounted in the spacing between two plates of a pair and associated with a corresponding row of needles, the selector members being adapted to move in a same plane parallel to a plane of the plates and in a direction that is transverse to a direction of pushing of the device;
- and
- a two-part electromagnetic circuit for each selector member allowing the creation of at least one induced electromagnetic field, the electromagnetic circuit being oriented transverse to the plane of the plates, two parts of the electromagnetic circuit being mounted on opposing faces of two plates and including a wound main part with at least two opposite electromagnetic polar ends, and an armature for closing the electromagnetic field, the armature being positioned opposite the wound main part, wherein each selector member comprises a magnetized part positioned between the two parts of the associated electromagnetic circuit to allow the movement of the magnetized part to be controlled.
Dependencies are inferred from the claim text.