Abstract: An improved weft carrying/feeding gripper for weaving machines, consisting of two components which are biased together by a spring device, and wherein one of the contact areas of at least one of the components comprises a resilient component (6), and wherein the setting of the pretension of the resilient component (6) is adjustable. The weft is thus held firmly in a direction along its length between the contact areas, and loosely in a weft feeding direction.

Abstract: A valve arrangement for the control of blowers of air jet looms that are attached to a batten, wherein the valve is formed by a housing fastened to the batten, and is provided with an inlet for blow air and an outlet connected with at least one blower or nozzle. A valve closing element moves with respect to the housing to open and close the valve. A valve actuator mechanism commands the valve closing element which is arranged to move in a translating direction parallel to the batten axis to cover the air outlet port in a plane perpendicular to the valve translating direction.

Abstract: Optical scanning and inspection of loomed fabric on one or more looms is carried out using a travelling optical scanner that scans an inspection area of fabric on a loom faster than the fabric traverses the inspection area, such inspection area provided between the weaving portion of the loom and the fabric take-up roll. The scanner generates signals that can routinely be compared with preset reference standards and which can be used to control the stopping of the loom upon the detection of a weaving defect. Fabric moving through multiple looms can be scanned in sequence by a scanner traversing multiple inspection areas of the looms.

Abstract: An adjustable control for weft thread delivery of an air jet weaving loom includes a system for selectively controlling the control time and the duration of master weft delivery jets in response to measurements made of weft thread delivery during the weaving process. Different types of weft threads are provided with their own master jets that are independently controllable as to duration time and/or control time. The duration and/or control time of auxiliary jets disposed along the shed of the loom are also controllable in response to detected weft motion. The system also includes a control system for the weft supply drums responsive to detected weft thread delivery during the weaving process.

Abstract: A weft cancellation mechanism for gripper looms, characterized by consisting primarily of a bar (7) located in a position situated between the feed of the weft (4) and the shed (2) which forms an angle with the weft or wefts (4), this bar (7) being attached to an electromagnet (9) which, once a weft breaks, is activated so as to remove the weft (4) offered up to the gripper from the path of the gripper (6).

Abstract: A batten for a massive or weaving loom of the kind composed of a solid batten shaft on bearings, on which shaft batten components like batten legs, a batten beam and a reed are fastened, characterized by the fact that the batten is located in such a way that its swinging axis (O--O) is parallel with the central axis (A--A) of the batten shaft (1) and with the axis of gravity (Z--Z) of the system composed of the batten shaft (1) and of the batten components (2, 3, 4) fastened on it, whereby the swinging axis (O--O) and the axis of gravity (Z--Z) are located outside the center axis of the shaft (A--A), but within the periphery of the batten shaft (1).

Abstract: A shot seeking mechanism for weaving looms characterized by consisting primarily of the combination of two clutches (1 and 2), each of which is respectively constituted primarily of clutch units (5 and 6 and 7 and 8) whereby one of these clutches is placed between a drive component (3) and a driven component (4) of the main shaft of the machine, while the second clutch (2) is placed between the driven component (4) of the main shaft of the machine and an auxiliary drive motor (13).

Abstract: Weft gripper drive for looms of the type consisting of a flexible perforated tape at one end of which a gripper is fixed and of an oscillating gear-wheel that enmeshes with the tape along part of its circumference, whereby guiding devices are provided where the tape leaves the wheel, characterized thereby that the tooth height of the wheel is smaller than the thickness of the tape and that the form and dimensions of the teeth and of the perforations barely allow a mutual enmeshment, whereby the side of the tape directed towards the wheel, in the enmeshment zone, is tangent to the root circle of the gearing of the wheel.

Abstract: Device for electronically controlling pneumatic thread tensioners or other related components of looms of the kind comprising a cam, the motion of which is synchronized in relation to the rotation of the crankshaft of the loom and which produces a signal by means of an electronic detector, characterized in that it also comprises a generator of electric impulses which is excited by the aforesaid signal for emitting a train of impulses with an adjustable frequency by means of which per operational cycle, is being effected the control of the concerned components of the machine.

Abstract: Weft inserting device for pneumatic weaving looms, of the type comprising a yarn pulling off mechanism, an air jet nozzle next to an edge of the warp, and a clamp which is located between these two last named components, this clamp being cyclically controlled to clamp the yarn at the end of the insertion of the next weft yarn, characterized in that the mutual geometric positions of the yarn pulling off mechanism and of the clamp are selected in relation to the position of the jet nozzle so that the yarn completely leaves the clamp whilst the latter is open.

Abstract: Device for selecting the color of weft threads in looms, characterized in that the mechanism controlling the weaving programme transmits a mechanical order to a so called color selector which converts the said order in a first electric signal which is sent to a synchronization device and is momentarily stored therein, whereas a second signal is produced by a switching disc and a contactless switch as a function of the rotation of the drive shaft of the loom, whereby the said first signal is sent by the said synchronization device to a so called color giver as soon as the said second signal has reached the said synchronization device.

Abstract: The invention pertains to a process for watching the weft thread of weaving looms, characterized by the fact that it consists in preparing a stop signal for the weaving loom, each time the weft carrier has completely left the shed; in checking for the presence of the weft thread behind the weft carrying means, just outside the shed, and in cancelling aforesaid stop signal if thread is present, respectively in making use of the stop signal if thread is absent.

Abstract: The invention pertains to an improved slay for weaving looms, consisting of the slay itself and of two slay swords, characterized by the fact that at least the slay swords are built as hollow structures, whereby the head of each slay sword is attached to the corresponding end of the slay and along the extension of same, and whereby the width of the slay swords is greater than that of the slay itself.

Abstract: The present invention concerns a mechanical multiplier for weaving looms, for instance for the drive of rapiers or lances, of the head frames or such like.