Abstract: 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.

Abstract: An electropneumatic converter controlled by solenoid valves, in which the solenoid valves are connected respectively to the feed pressure and to atmosphere, each via a pressure regulator controlled by a differential pressure measurement device connected across a respective solenoid valve, so as to maintain a constant pressure difference across the solenoid valves.

Abstract: A combination control valve wherein a seal directed towards the valve exterior is achieved by a double gland which straddles a lantern sleeve with an intermediate vent and is pressed axially between the stem and guide for the main valving member by preloaded elastic elements, said guide being held elastically pressed against the differently inclined surface of a shoulder ring retained by circular sectors fitted into the valve body, a series of labyrinths being interposed between said guide and said main valving member, the pilot valving member being of parabolic profile, a bellows elastic seal element being provided between the first seat and the valve body, the trim including a hollow cylindrical structure which is inserted coaxially into an end cavity in the main relying member, is provided with transverse holes arranged offset from corresponding holes in the cavity of the main valving member, and terminates with a parabolic profile.

Abstract: A shuttleless loom weft brake includes at least two braking units arranged in series in the weft yarn travel direction and operating mutually out of phase. Each unit formed from a vertically arranged elastic blade at least partly of ferromagnetic material and a flat support plate of non-magnetic material, between which the weft yarn is made to travel. The blade is fixed to the frame of the weft brake by the end which is closer to the feed bobbin and is preloaded in a direction urging it away from said support plate and against a respective stop pin. The blade is pressed against the support plate by the attraction of an at least one electromagnet of adjustable excitation.

Abstract: A device for continuously regulating the feeler sensitivity in the control of weft insertion in a loom. The device includes a selector having a memory into which the sensitivity value corresponding to the count of the weft passing through the eye of each rod is fed. The selector is electrically connected to a piezoelectric sensor-comparator, and is controlled by a logic control unit. The logic control unit provides electrical pulses or signals for selecting weft presenter rods of a presenter, and the same signal from the logic control unit is provided to the selector, such that the selector utilizes the signal from the logic control unit for providing the feeler sensitivity information to the sensor-comparator.

Abstract: A flowmeter controller, which includes emitter sensor pairs coaxial to a rectilinear measurement tube which has a cross-section uniformly decreasing from its inlet, this latter being of annular radial extension symmetrical about the tube axis, and being provided with a grid of annular structure offering resistance to passage of the fluid under examination which increases from the outer end to the inner end of the grid, and being connected to the tube by an annular inlet duct which is curved in the shape of a circular arc with a uniformly decreasing cross-section and including a deflection fairing an axial flow deflector is provided at the tube outlet to convey the fluid into an annular duct of decreasing cross-section and the radial exit port is closable by a valving member moved along the measurement tube axis by an operating member.

Abstract: A system for maintaining a constant terry height in forming a terry cloth despite loom stoppage, e.g., to correct yarn breakage. The system includes a proximity sensor which is positioned at a predetermined distance from a floating roller, and on the same side of the floating roller as a loading spring. The proximity sensor causes stoppage of an electric motor of the feed beam for the terry warp yarns which were previously driven in a forward direction by the electric control center. Upon sensing movement of the floating roller by a predetermined distance, the electrical control sensor causes motion inversion of the electric motor to reverse the movement of the feed beam for the terry warp yarns.

Abstract: A mechanism for transmitting the selection command for a reed beating position in a terry loom, the terry loom including a connecting rod, one end of which is hinged to the common articulated joint of two pivoted arms by which the support body for the toothed sector mounted on the axis of rotation of the loom sley is hinged to the lower end of the sley, the other end being hinged to the end of the rocker lever. The other end is hinged so as to lie on the axis of rotation of the sley when said rocker lever rests against the fixed shoulder of the loom.

Abstract: 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.

Abstract: A loom with a leno-weaving device which can act completely within the loom heddle frames, with the two links of the leno-weaving device slidably supported within a slide guide. The slide guide extends from within the heddle frames, and is located above the reed, with the two links driven by a single cam drive and a pair of spring-loaded pushers. The spring-loaded pushers can extend into the heddle frames, and are connected to one end of the links, with the links thus raised and lowered within the heddle frames while being slidingly supported by the slide guide. An advantageous cam drive can also be provided which allows for switching of the mode of the operation, to switch the type of weaving being performed by axially moving a shaft upon which cams of the cam drive are mounted.

Abstract: A roller bearing of very small axial extension and with sliding annular elastic seals is provided for forming a connection joint. Opposing shoulder rings project orthogonally beyond the guide and rolling track of the bearing outer race, which race is of rectangular cross-section. The rings are held in position by the two cheeks of the female part of the joint that is to be formed. Annular elastic seals, moreover, cooperate under axial action with the sides of the bearing outer race. Preferred embodiments of the seals and of the shoulder rings are also provided.

Abstract: A seal system particularly suitable for a process valve, in which the intermediate chamber formed between two sliding seal gaskets arranged in series is connected to a static separator of elastic plenum chamber or bag type filled with a biodegradable, non-contaminating, non-aggressive auxiliary lubricant fluid, the internal plenum chamber or bag, which is of very high elasticity, being connected to the process fluid and cooperating with a movable head which itself cooperates with a position sensor. A modified embodiment is also described.

Abstract: A cam for a revolving dobby includes a plate with an upwardly extending protective external edge, the external edge has two peripherally located, mutually opposite notches, key levers are associated with the plate and are protected by the external edge, thrust teeth on the auxiliary and drive pushers cooperate with the key levers. The thrust tooth of the drive pusher is rotatable hinged relative thereto and is rotated on the same axis as the auxiliary pusher, springs cooperate with the auxiliary and drive pushers to engage the key levers via one of the notches on the plate.

Abstract: 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.

Abstract: 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.

Abstract: A barrier system for the lubricating oil for the bearings of a centrifugal compressor with labyrinth seals installed in a confined environment, consisting of a disc concentrically rigid with the rotating compressor shaft in the chamber facing the bearing situated on the compressor suction side, in a position between said bearing and the relative suction side labyrinth seal, the disc having an inverted U-shaped rim housing a stator ring rigid with the wall of said chamber and arranged concentric with said shaft, which with said rotating disc forms a small passage continuously fed, and kept filled by the centrifugal effect of said rotating disc, with barrier oil bled from the lubricating oil feed, said stator ring being provided, on that side facing the disc, with a wedge which is inserted into a corresponding cavity in the disc, and with an annular deflector tooth projecting beyond the outer edge of said disc cavity.

Abstract: A device for driving the ring levers that control the keys of a high-speed rotary dobby. In the device, a metal rocker armature is hinged to each lever along the axis of symmetry of the device. The axis passes through the fulcrum about which the levers rock. The levers have at their lower ends teeth that cooperate with corresponding grooves in two digging tracks that move with a reciprocating motion and in mutual opposition perpendicular to the axis of symmetry. The upper rocker armature surface, moreover, cooperates with one of two overlying electromagnets that are arranged symmetrically about the axis of symmetry.

Abstract: An weft yarn gripping device in a shuttleless loom in which the spring-loaded lever for pressing the gripping foot onto the relative rigid gripping surface cooperates with a travel stop block which absorbs part of the load exerted by said spring. The block is connected to the foot by a leaf spring rigid with the lever, and the leaf spring is inserted into a slot in a connection block which is rigid with said foot. Various mechanisms are also provided for varying the load transmitted to the gripping foot.

Abstract: 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.

Abstract: 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.