Abstract: A support and locking device for nozzles of a high-pressure stage in gas turbines comprises a plurality of groups of stator vanes, which are associated with a plurality of outer sealing plates, for connection of the groups to the outer liner of the combustion chamber, and are associated with a plurality of inner sealing plates, for connection of the groups to the inner liner of the combustion chamber. Each of the groups of stator vanes is locked by an inner ring, and the ring has a first series of outer holes to reinforce this locking, and a second series, of inner, through holes, which are provided in an inner extension of the ring and are used to secure the ring itself to the structure of the gas turbine.

Abstract: A gas flow control valve which enables mass flow to be measured using a flow straightener in a valve entry duct, a tube for lengthening the entry duct into the valve, a valve element exit port with suitably radiused edges and a flow stabilizer in the valve exit duct. Upstream and downstream pressure taps are positioned immediately upstream of the flow straightener and downstream of the flow stabilizer respectively. This enables the flow rate to be controlled not by the formulas traditionally used for valve dimensioning, but by formulas derived from more accurate formulas used for calculating mass flow with standard members of a fixed restriction type.

Abstract: A system for measuring and controlling the mass flow of a gas of variable characteristics within a pipe by a metering valve, wherein a Coriolis mass flow meter mounted in the pipe is connected to the valve processor unit to calculate a correction factor for the flow rate calculated by the valve and represented by the ratio of the values originating from the Coriolis meter to those originating from the valve, this factor being updated periodically when the operating conditions do not introduce an error into the Coriolis meter. A multi-valve system for different flow rates is also described comprising a single Coriolis meter.

Abstract: A giver gripper for a gripper loom comprising a gripper body having a substantially U-shaped cross section including a base and two laterally spaced side walls, one of the side walls adapted to be closer to an associated loom reed, the laterally spaced side walls each having a forward vertical portion, wherein a forwardmost point of the forward vertical portion of the one of the side walls projecting more forwardly than the other of the forward vertical portions; a cover member located on the gripper body between the laterally spaced side walls, the cover having a forward tip located substantially between the forward vertical portions of the side walls, the forward tip having a height greater than the base of the gripper body and less than the forward vertical portions of the side walls; a gripping member for a weft yarn positioned on the base adjacent of the side walls; a guide and positioning groove for the weft yarn; a deflector for maintaining the weft yarn inclined within the giver gripper; wherein the c

Abstract: A gripper loom tape head including a base, comprising a gripper support crest attached to the tape head, the tape head having a plurality of through fixing holes flared towards the base of the tape head and arranged in two longitudinal rows on one and the other side of a longitudinal axis of the tape head, which comprises two flared holes, of greater diameter than the holes, on the longitudinal axis in proximity to the longitudinal ends of the crest, characterized in that the gripper support crest is prefabricated in any desired material, is provided with a series of through fixing holes in proximity to its lower end, is arranged along the longitudinal axis of the underlying tape head perpendicular to this latter and spaced therefrom by a certain gap, and is maintained in position for all or nearly all its length by a thermoplastic injection-molding material which surrounds most of the prefabricated crest and becomes inserted into the fixing holes of this latter, into the gap between the crest and the tape he

Abstract: Twin-screw pump, wherein the four conical screws are vertically arranged and are fed with biphase fluid at the two ends, independently of each other, by means of a stream divider and wherein the two screw shafts each have a central axial drilling which connects the delivery chamber to a series of radial channels which end up on the tip of the single teeth of the screws. A preferen-tial stream divider is described.

Abstract: An automatic positioning system in which a divider element divides the space between the initial position and the required final position into a predetermined number of well defined measurement positions at predetermined but not necessarily constant intervals, at these positions measurement means determining the effective time, velocity and acceleration values and hence the extent of disturbances as an acceleration difference, while suitable calculation means define the acceleration change to be applied to the drive member to compensate said disturbances and restore the predefined law of motion; two different calculation means are also defined.

Abstract: An improved device for shifting the seats of a top entry ball valve, consisting of two identical portions, one for each valve seat, which are permanently interposed between the valve body and the relative seats; each portion comprises a stop ring made rigid with the valve body by first locking means, and a seat shifting second ring cooperating with a valve seat and movable axially by operating means into a withdrawn position to enable said valving element to be extracted or into an active position in which it is locked in position by second locking means. Preferred embodiments of said means are also described.

Abstract: A dobby lever which is insertable into a main lever of a textile loom includes a sliding nut to set and adjust its position along the main lever. The dobby lever has a pair of parallel flat sides, separate but fixed to each other. The sliding nut has a body which can be inserted between the sides of the main lever. The body of the sliding nut has a hole at one end for receiving a joint which can be connected to a driving bar and a blocking device at its other end for the sides of the main lever. The body at the other end has sloping surfaces, and wedge-shaped elements are provided having complimentary slanting surfaces which are insertable into a box-shaped container and act upon the sides of the main lever.

Abstract: An apparatus for rapidly and simultaneously, coupling and uncoupling loom heald frames, of varying length, to and from their respective drive bell cranks. Each heald frame attaches to more than one head of a flexible tie-rod, which in turn, extends down to adjustment sliders which are connected to the drive bell cranks. During the heald frame coupling and uncoupling from a locking apparatus at the head of the flexible tie-rod, two tilting jaws keep all of the flexible tie-rods in a rigid vertical position.

Abstract: A device for measuring the warp yarn tension of a woven fabric in a loom, which includes a fixed deviation bar which extends across the entire loom width and cooperates with a device measuring warp yarn tension, the fixed deviation bar having a central or intermediate portion for the fabric under formation, the intermediate portion being of a length less than that of a minimum formable fabric width and being detached from the remaining sections of the bar by thin breaks in the deviation bar. The intermediate portion is supported via at least one load cell. The device is located in the loom to measure the tension of the fabric already woven and prior to its being wound on the winding beam.

Abstract: A guide system for a gripper insertion tape in a shuttleless loom which includes a sley with a reed, through the dents of which pass upper and lower warp yarns forming a shed, at least one insertion tape moving with reciprocating motion between the upper and lower warp yarns of the open shed, a gripper fixed to one end of the tape to convey a weft yarn through the shed, and a plurality of guide teeth fixed spaced apart on the sley and projecting through the lower warp yarns of the shed when the shed is open. The teeth are provided with a bearing and guiding surface for the insertion tape and for the gripper. The bearing and guiding surface of the teeth includes a convex surface which extends in the direction of the warp yarns. A control mechanism is also provided making guiding of the insertion tape and the gripper more effective during travel thereof within the shed.

Abstract: A weft cutter for an air loom in which a movable blade is hinged to the ram of a pneumatic cylinder which is pneumatically fed through a solenoid valve provided at its inlet with a pressure regulator. The ram is kept in a rest position by a return spring and the solenoid valve is directly piloted from a loom control console.

Abstract: A fill end catching/clamping system in a fill drive clamp body provided at one end with a hook. A wedge is designed to axially move inside the hook. A wall of the wedge cooperates with a wall of said hook to form a "V"-shaped hollow in which the fill end is clamped. At least one elastic blade, positioned below the wedge, has a side wall that cooperates with the wall of the hook which forms one side of the "V"-shaped hollow to assist in retaining the fill end or ends in the "V"-shaped hollow.

Abstract: A control system for a pneumatic valve actuator comprising three operating blocks memorizing respectively the values of the spring pressure p.sub.m, the counter-thrust pressure p.sub.c and the friction pressure p.sub.a for the various valving member position values, said blocks being connected in parallel and, via a switch, to the valving member position transducer or to the set position generator and connected to the pressure computing block connected via a second switch to the pressure generator or, together with the value read by a transducer for the pressure existing in the actuator, to a differentiator connected to two multiplier units for K and for (1-K) respectively, which are connected to the transit memory of the p.sub.c operating block and to the p.sub.a operating block respectively, the switches being driven by a logic control unit which switches over when the valving member is at rest. Means are provided for sensing anomalies and the extent of wear.

Abstract: A main nozzle for an air jet loom has an outer casing and is provided with a compressed air introduction duct and a mixing chamber. A mixer tube provided with an annular distributor ring is inserted into the outer casing to form with the outer casing and annular distribution chamber upstream of the distributor ring and, downstream of the distributor ring, and annular accceleration chamber which feeds into the mixing chamber. The distributor ring has annularly arranged blowing slots. The acceleration chamber is formed by an outer conical wall provided on a portion of the inside of the outer casing and an inner conical wall provided on a portion of the mixing tube. The tapered walls of the annular acceleration chamber optimize the air jet used for inserting the weft into the shed. The inclination of the taper of the outer wall of the nozzle annular acceleration chamber is 12.degree.-16.degree., and that of the inner wall is 4.degree.-8.degree.. In the preferred embodiment, the taper of the outer wall is 15.

Abstract: A reed for an air-jet loom which includes an entry flare allowing several main nozzles to be used. The reed has an inclination of the lower surface of an air guide channel, and an advantageous spacing between the binding spirals which support upper and lower ends of the reeds. The arrangement provides for effective, reliable multi-weft weaving, and can increase the weaving efficiency of the loom, particularly when weaving yarns with irregularities. In a preferred embodiment, the distance between the two binding spirals is approximately 81 mm, with the lower surface of the entry flare having an inclination of approximately 6.degree. with respect to a normal to the rear surface of the channel.

Abstract: An electromagnet-striker bar system for the control device of a rotary dobby includes an amagnetic container having an extremely rigid box structure into which the iron cores of the electromagnets are equidistantly inserted and irreversibly locked. Amagnetic spools for supporting the electrical windings are mounted on electromagnetic pole pieces. The container is provided, in that side further from the hinging axis of said striker bars, with a longitudinal groove into which are inserted the amagnetic support and slide shoulders for the free ends of the striker bars. The free ends of the striker bars are hardened by heat treatment.

Abstract: A compact diffuser for high-power gas turbines, comprising a first diffusion section of substantially axial path defined by two conical coaxial walls, followed by a double curved diffuser with three walls, of which the intermediate wall is cantilever-supported by a set of aerodynamically profiled ribs disposed horizontally and situated near the exit of said double curved diffuser. The diffuser is connected to the turbine exhaust casing by an envelope internal to said exhaust casing and having its contours smoothly joined to the diffuser.

Abstract: System of submarine linking between the anchoring cylinders of the legs of a platform and the relating foundation piles in which the anchoring cylinders are constituted each by two coaxial cylinders defining between each other a radially expansible annular interspace, the inner cylinder being made of steel with yield strength not higher than the half of the yield strength of the relating foundation pile, which is provided in its turn, in the zones wherein the linkage is to be accomplished, with an inner thickening and with a sequence of slots and toothings on its outer surface as well as, possibly, with inner peripheral ribs.