Apparatus for the controlled moving of a warp thread
AssigneeSulzer Rueti AG
InventorDietmar Markward
Life of this patent
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Abstract
An apparatus moves a warp thread in a controlled manner by a punctuate compulsory guidance between three positions, namely a middle, an upper and a lower position. It comprises a pendulum which is pivotal about an axis and into which an electrical coil is integrated and stationary permanent magnets. The named positions are given by equilibrium positions of the pendulum, with forces which act on the pendulum in these positions being in each case in an equilibrium. The equilibrium positions for the upper or the lower position respectively can be produced by forces between the permanent magnets and the currently carrying coil; the equilibrium position for the middle position is given by the pendulum with a current-less coil.
Claims14
An apparatus for controlled moving of a warp thread by a punctuate compulsory guidance between three positions, namely a middle position, an upper position, and a lower position, the apparatus comprising:
- a pendulum which is pivotal about a pendulum axis to move between left and right positions, the pendulum including an electrical coil chargeable with a current, the pendulum configured to be connected with the warp thread;
- and
- a pair of stationary permanent magnets disposed adjacent the right position and the left position, respectively,
- wherein the pendulum is movable between the three positions and is in equilibrium in the three positions by forces between the electrical coil and the stationary permanent magnets, the middle position in equilibrium being produced when the electrical coil is current-less, the upper position in equilibrium being produced when the electrical coil carries a current in one polarity, the lower position in equilibrium being produced when the electrical coil carries a current in an opposite polarity.
A weaving machine comprising:
- a plurality of apparatuses each for controlled moving of a warp thread by a punctuate compulsory guidance between three positions, namely a middle position, an upper position, and a lower position, each apparatus comprising:
- a pendulum which is pivotal about a pendulum axis to move between left and right positions, the pendulum including an electrical coil chargeable with a current, the pendulum configured to be connected with the warp thread;
- and
- a pair of stationary permanent magnets disposed adjacent the right position and the left position, respectively,
- wherein the pendulum is movable between the three positions and is in equilibrium in the three positions by forces between the electrical coil and the stationary permanent magnets, the middle position in equilibrium being produced when the electrical coil is current-less, the upper position in equilibrium being produced when the electrical coil carries a current in one polarity, the lower position in equilibrium being produced when the electrical coil carries a current in an opposite polarity;
- and
- an electronic and programmable control system for actuating the apparatuses,
- wherein the electrical currents of the coils are settable and predeterminable in accordance with warp thread type.
Dependencies are inferred from the claim text.