摘要:
A control system for a plurality of tuck-in selvedge forming devices in a loom having a variable reed beat-up position includes a main shaft, a drive shaft connected to all the tuck-in selvedge forming devices, a modulator driven by the main shaft and having an output shaft which pauses at least once during each revolution of the main shaft, as well as a coupling unit rotatable with the drive shaft and operative to be selectively rotatably coupled to the modulator output shaft so that the drive shaft is driven by the main shaft. The coupling unit includes a ring fixed to the drive shaft and a first cover pivoted to the ring so that a key can enter into the recess of the modulator output shaft to rotatably couple the coupling unit to the modulator output shaft during its pauses. A second lever is biased so as to follow contours of a control cam and prevent the first key from entering the recess of the modulator output shaft. An electromagnet controlled by a logic unit cooperates with the second lever to prevent the second lever from engaging the first lever.
摘要:
A crank lever for loom linkages, comprising a body of high-strength aluminum plate with a central hole and grooves on the inner and outer body faces adjacent the hole. A central annular rotation and thrust-bearing hub of steel surface-hardened by heat treatment is inserted into said hole and locked therein by simple compressive plastic deformation of its outer annular edge facilitated by the grooves.
摘要:
A control device for rotary dobbies in which a key has a transverse groove of width equal to the thickness of a control ring with which it cooperates plus the length of travel undergone by the key in its insertion into or withdrawal from radial grooves in a big end of a main crank arm or in a drive shaft. The control ring has an elliptical shape and is fixed onto a operating lever which, pivoted on a minor axis of an ellipse and retained in its rest position by a V-shaped spring, is made to rock to one side or the other about the axis of symmetry of the spring by a pusher rod. The pusher arm is operated by a cam mechanism and moved by a needle selector controlled by a programmer, to act on one of two valleys provided in a rocking sector on an operating lever symmetrically about an axis of symmetry.
摘要:
A tape drive system for the weft gripper of a shuttleless loom which uses a plastically undeformable tape formed of composite laminate layers containing rigid fibers. The tape is driven by a sprocket engaging perforations provided along the tape and the engagement is being ensured by two shoulder blocks. Additionally the tape is provided with a permanent magnet at that end carrying said weft gripper cooperating with a metal plate extending along the whole or at least part of a tape travel track.
摘要:
Device for selection and presentation of the weft yarns for high-speed looms, in which the mechanism of selection of the weft yarns comprises a set of collars, each equipped with an iron armature. The collars are slid through a free end of selectors and cooperate with a transverse lifting beam as well as with a corresponding set of permanent magnets equipped with a coil in order to nullify the magnetic field generated by the same magnet.
摘要:
A bladed loom reed comprising a support base onto which are placed a series of preassembled packs of blades. Each preassembled pack has blades fixed to an auxiliary support and the bladed loom reed is formed by combining the packs on a support base with or without intermediate spacers between packs.
摘要:
A system for safe vapor recovery, particularly for fuel filling installations, in which a positive displacement pump effects controlled drawing of a vapor-air mixture into a vapor return pipe which extends to the bottom of the underground tank of the installation. The system is provided with a non-return valve downstream of the pump and a special circuit for effecting the controlled in-drawing based on the quantity of fuel delivered, the difference in temperature between the underground tank and the recovered mixture, and especially on the density of the mixture, by which its degree of explosiveness is determined. Structure are also provided for preventing or limiting explosion propagation.
摘要:
A warp yarn tensioning device for a loom, in which the warp yarns are wound about a compensator roller through an arc of approximately 180.degree.. The roller is movable against the action of counteracting springs either by rotation or by translation in the direction of the thus wound substantially parallel warp yarns and is supported about an axis by bearings. The device operates in feeding the shed with yarns from the warp beam and in maintaining a constant yarn tension during loom operation. This is accomplished by supporting the compensator roll to undergo only a small amount of swing or translational movement in order to follow the warp yarn tension variations.
摘要:
Hydraulic-exchange pumping device comprising two containers or tanks, inside each of which there are defined: a chamber for the product to be pumped, which is respectively connected, through a delivery valve and a suction valve, to the lines of delivery and of intake of the product to be pumped, as well as a chamber for the hydraulic drive fluid, which is connected to a pump through a four-way, three-position distribution box. This partitioning is accomplished by means of an internal elastic membrane having a decreasing thickness from the its peripheral edge towards its central zone, which can be also equipped with a strengthening cloth embedded inside it, as well as with a set of metal rings having a cross-section surface area decreasing towards the center of the same membrane.
摘要:
An electronic fast-starting system for a textile loom in which an asynchronous driving motor, whose phase windings are triangularly connected, is mechanically connected to the main crank shaft of the loom and is controlled by an inverter/controller receiving not only the set speed value but also the outlet signal of a speed detector situated on the main crank shaft.